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-rw-r--r--lapi.c18
-rw-r--r--lcode.c1045
-rw-r--r--lcode.h49
-rw-r--r--ldebug.c360
-rw-r--r--ldebug.h27
-rw-r--r--lfunc.c11
-rw-r--r--lgc.c8
-rw-r--r--llimits.h89
-rw-r--r--lobject.h8
-rw-r--r--lopcodes.h219
-rw-r--r--lparser.c558
-rw-r--r--lparser.h32
-rw-r--r--ltests.c133
-rw-r--r--lvm.c476
-rw-r--r--lvm.h7
15 files changed, 1599 insertions, 1441 deletions
diff --git a/lapi.c b/lapi.c
index 45139f6c..36e0aef7 100644
--- a/lapi.c
+++ b/lapi.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lapi.c,v 1.140 2001/04/17 17:35:54 roberto Exp roberto $ 2** $Id: lapi.c,v 1.141 2001/04/23 16:35:45 roberto Exp roberto $
3** Lua API 3** Lua API
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -184,9 +184,10 @@ LUA_API int lua_iscfunction (lua_State *L, int index) {
184LUA_API int lua_isnumber (lua_State *L, int index) { 184LUA_API int lua_isnumber (lua_State *L, int index) {
185 TObject *o; 185 TObject *o;
186 int i; 186 int i;
187 TObject n;
187 lua_lock(L); 188 lua_lock(L);
188 o = luaA_indexAcceptable(L, index); 189 o = luaA_indexAcceptable(L, index);
189 i = (o == NULL) ? 0 : (tonumber(o) == 0); 190 i = (o != NULL && (ttype(o) == LUA_TNUMBER || luaV_tonumber(o, &n)));
190 lua_unlock(L); 191 lua_unlock(L);
191 return i; 192 return i;
192} 193}
@@ -234,13 +235,18 @@ LUA_API int lua_lessthan (lua_State *L, int index1, int index2) {
234 235
235 236
236LUA_API lua_Number lua_tonumber (lua_State *L, int index) { 237LUA_API lua_Number lua_tonumber (lua_State *L, int index) {
237 StkId o; 238 const TObject *o;
238 lua_Number n; 239 TObject n;
240 lua_Number res;
239 lua_lock(L); 241 lua_lock(L);
240 o = luaA_indexAcceptable(L, index); 242 o = luaA_indexAcceptable(L, index);
241 n = (o == NULL || tonumber(o)) ? 0 : nvalue(o); 243 if (o != NULL &&
244 (ttype(o) == LUA_TNUMBER || (o = luaV_tonumber(o, &n)) != NULL))
245 res = nvalue(o);
246 else
247 res = 0;
242 lua_unlock(L); 248 lua_unlock(L);
243 return n; 249 return res;
244} 250}
245 251
246LUA_API const l_char *lua_tostring (lua_State *L, int index) { 252LUA_API const l_char *lua_tostring (lua_State *L, int index) {
diff --git a/lcode.c b/lcode.c
index 783158d9..2658e602 100644
--- a/lcode.c
+++ b/lcode.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lcode.c,v 1.67 2001/04/06 18:25:00 roberto Exp roberto $ 2** $Id: lcode.c,v 1.68 2001/04/23 16:35:45 roberto Exp roberto $
3** Code generator for Lua 3** Code generator for Lua
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -11,6 +11,7 @@
11#include "lua.h" 11#include "lua.h"
12 12
13#include "lcode.h" 13#include "lcode.h"
14#include "ldebug.h"
14#include "ldo.h" 15#include "ldo.h"
15#include "llex.h" 16#include "llex.h"
16#include "lmem.h" 17#include "lmem.h"
@@ -19,6 +20,12 @@
19#include "lparser.h" 20#include "lparser.h"
20 21
21 22
23#define hasjumps(e) ((e)->t != (e)->f)
24
25#define getcode(fs,e) ((fs)->f->code[(e)->u.i.info])
26
27
28
22void luaK_error (LexState *ls, const l_char *msg) { 29void luaK_error (LexState *ls, const l_char *msg) {
23 luaX_error(ls, msg, ls->t.token); 30 luaX_error(ls, msg, ls->t.token);
24} 31}
@@ -33,12 +40,27 @@ static Instruction previous_instruction (FuncState *fs) {
33 if (fs->pc > fs->lasttarget) /* no jumps to current position? */ 40 if (fs->pc > fs->lasttarget) /* no jumps to current position? */
34 return fs->f->code[fs->pc-1]; /* returns previous instruction */ 41 return fs->f->code[fs->pc-1]; /* returns previous instruction */
35 else 42 else
36 return CREATE_0(-1); /* no optimizations after an invalid instruction */ 43 return (Instruction)(-1);/* no optimizations after an invalid instruction */
44}
45
46
47void luaK_nil (FuncState *fs, int from, int n) {
48 Instruction previous = previous_instruction(fs);
49 if (GET_OPCODE(previous) == OP_LOADNIL) {
50 int pfrom = GETARG_A(previous);
51 int pto = GETARG_B(previous);
52 if (pfrom <= from && from <= pto+1) { /* can connect both? */
53 if (from+n-1 > pto)
54 SETARG_B(fs->f->code[fs->pc-1], from+n-1);
55 return;
56 }
57 }
58 luaK_codeABC(fs, OP_LOADNIL, from, from+n-1, 0); /* else no optimization */
37} 59}
38 60
39 61
40int luaK_jump (FuncState *fs) { 62int luaK_jump (FuncState *fs) {
41 int j = luaK_code1(fs, OP_JMP, NO_JUMP); 63 int j = luaK_codeAsBc(fs, OP_JMP, 0, NO_JUMP);
42 if (j == fs->lasttarget) { /* possible jumps to this jump? */ 64 if (j == fs->lasttarget) { /* possible jumps to this jump? */
43 luaK_concat(fs, &j, fs->jlt); /* keep them on hold */ 65 luaK_concat(fs, &j, fs->jlt); /* keep them on hold */
44 fs->jlt = NO_JUMP; 66 fs->jlt = NO_JUMP;
@@ -47,36 +69,33 @@ int luaK_jump (FuncState *fs) {
47} 69}
48 70
49 71
72static int luaK_condjump (FuncState *fs, OpCode op, int B, int C) {
73 luaK_codeABC(fs, op, NO_REG, B, C);
74 return luaK_codeAsBc(fs, OP_CJMP, 0, NO_JUMP);
75}
76
77
50static void luaK_fixjump (FuncState *fs, int pc, int dest) { 78static void luaK_fixjump (FuncState *fs, int pc, int dest) {
51 Instruction *jmp = &fs->f->code[pc]; 79 Instruction *jmp = &fs->f->code[pc];
52 if (dest == NO_JUMP) 80 if (dest == NO_JUMP)
53 SETARG_S(*jmp, NO_JUMP); /* point to itself to represent end of list */ 81 SETARG_sBc(*jmp, NO_JUMP); /* point to itself to represent end of list */
54 else { /* jump is relative to position following jump instruction */ 82 else { /* jump is relative to position following jump instruction */
55 int offset = dest-(pc+1); 83 int offset = dest-(pc+1);
56 if (abs(offset) > MAXARG_S) 84 if (abs(offset) > MAXARG_sBc)
57 luaK_error(fs->ls, l_s("control structure too long")); 85 luaK_error(fs->ls, l_s("control structure too long"));
58 SETARG_S(*jmp, offset); 86 SETARG_sBc(*jmp, offset);
59 } 87 }
60} 88}
61 89
62 90
63/* 91/*
64** prep-for instructions (OP_FORPREP & OP_LFORPREP) have a negated jump, 92** prep-for instructions (OP_FORPREP & OP_TFORPREP) have a negated jump,
65** as they simulate the real jump... 93** as they simulate the real jump...
66*/ 94*/
67void luaK_fixfor (FuncState *fs, int pc, int dest) { 95void luaK_fixfor (FuncState *fs, int pc, int dest) {
68 Instruction *jmp = &fs->f->code[pc]; 96 Instruction *jmp = &fs->f->code[pc];
69 int offset = dest-(pc+1); 97 int offset = dest-(pc+1);
70 SETARG_S(*jmp, -offset); 98 SETARG_sBc(*jmp, -offset);
71}
72
73
74static int luaK_getjump (FuncState *fs, int pc) {
75 int offset = GETARG_S(fs->f->code[pc]);
76 if (offset == NO_JUMP) /* point to itself represents end of list */
77 return NO_JUMP; /* end of list */
78 else
79 return (pc+1)+offset; /* turn offset into absolute position */
80} 99}
81 100
82 101
@@ -96,609 +115,677 @@ int luaK_getlabel (FuncState *fs) {
96} 115}
97 116
98 117
99void luaK_deltastack (FuncState *fs, int delta) { 118static int luaK_getjump (FuncState *fs, int pc) {
100 fs->stacklevel += delta; 119 int offset = GETARG_sBc(fs->f->code[pc]);
101 if (fs->stacklevel > fs->f->maxstacksize) { 120 if (offset == NO_JUMP) /* point to itself represents end of list */
102 if (fs->stacklevel > MAXSTACK) 121 return NO_JUMP; /* end of list */
103 luaK_error(fs->ls, l_s("function or expression too complex")); 122 else
104 fs->f->maxstacksize = (short)fs->stacklevel; 123 return (pc+1)+offset; /* turn offset into absolute position */
105 }
106} 124}
107 125
108 126
109void luaK_kstr (LexState *ls, int c) { 127static Instruction *getjumpcontrol (FuncState *fs, int pc) {
110 luaK_code1(ls->fs, OP_PUSHSTRING, c); 128 Instruction *pi = &fs->f->code[pc];
129 OpCode op = GET_OPCODE(*pi);
130 if (op == OP_CJMP)
131 return pi-1;
132 else {
133 lua_assert(op == OP_JMP || op == OP_FORLOOP || op == OP_TFORLOOP);
134 return pi;
135 }
111} 136}
112 137
113 138
114static int number_constant (FuncState *fs, lua_Number r) { 139static int need_value (FuncState *fs, int list, OpCode op) {
115 /* check whether `r' has appeared within the last LOOKBACKNUMS entries */ 140 /* check whether list has any jump different from `op' */
116 Proto *f = fs->f; 141 for (; list != NO_JUMP; list = luaK_getjump(fs, list))
117 int c = fs->nknum; 142 if (GET_OPCODE(*getjumpcontrol(fs, list)) != op) return 1;
118 int lim = c < LOOKBACKNUMS ? 0 : c-LOOKBACKNUMS; 143 return 0; /* not found */
119 while (--c >= lim)
120 if (f->knum[c] == r) return c;
121 /* not found; create a new entry */
122 luaM_growvector(fs->L, f->knum, fs->nknum, f->sizeknum, lua_Number,
123 MAXARG_U, l_s("constant table overflow"));
124 c = fs->nknum++;
125 f->knum[c] = r;
126 return c;
127} 144}
128 145
129 146
130void luaK_number (FuncState *fs, lua_Number f) { 147static void luaK_patchlistaux (FuncState *fs, int list,
131 if (f <= (lua_Number)MAXARG_S && (lua_Number)(int)f == f) 148 int ttarget, int treg, int ftarget, int freg, int dtarget) {
132 luaK_code1(fs, OP_PUSHINT, (int)f); /* f has a short integer value */ 149 while (list != NO_JUMP) {
133 else 150 int next = luaK_getjump(fs, list);
134 luaK_code1(fs, OP_PUSHNUM, number_constant(fs, f)); 151 Instruction *i = getjumpcontrol(fs, list);
152 switch (GET_OPCODE(*i)) {
153 case OP_TESTT: {
154 SETARG_A(*i, treg);
155 luaK_fixjump(fs, list, ttarget);
156 break;
157 }
158 case OP_TESTF: {
159 SETARG_A(*i, freg);
160 luaK_fixjump(fs, list, ftarget);
161 break;
162 }
163 default: {
164 luaK_fixjump(fs, list, dtarget); /* jump to default target */
165 break;
166 }
167 }
168 list = next;
169 }
135} 170}
136 171
137 172
138void luaK_adjuststack (FuncState *fs, int n) { 173void luaK_patchlist (FuncState *fs, int list, int target) {
139 if (n > 0) 174 if (target == fs->lasttarget) /* same target that list `jlt'? */
140 luaK_code1(fs, OP_POP, n); 175 luaK_concat(fs, &fs->jlt, list); /* delay fixing */
141 else 176 else
142 luaK_code1(fs, OP_PUSHNIL, -n); 177 luaK_patchlistaux(fs, list, target, NO_REG, target, NO_REG, target);
143} 178}
144 179
145 180
146int luaK_lastisopen (FuncState *fs) { 181void luaK_concat (FuncState *fs, int *l1, int l2) {
147 /* check whether last instruction is an open function call */ 182 if (*l1 == NO_JUMP)
148 Instruction i = previous_instruction(fs); 183 *l1 = l2;
149 if (GET_OPCODE(i) == OP_CALL && GETARG_B(i) == MULT_RET) 184 else {
150 return 1; 185 int list = *l1;
151 else return 0; 186 int next;
187 while ((next = luaK_getjump(fs, list)) != NO_JUMP) /* find last element */
188 list = next;
189 luaK_fixjump(fs, list, l2);
190 }
152} 191}
153 192
154 193
155void luaK_setcallreturns (FuncState *fs, int nresults) { 194void luaK_reserveregs (FuncState *fs, int n) {
156 if (luaK_lastisopen(fs)) { /* expression is an open function call? */ 195 fs->freereg += n;
157 SETARG_B(fs->f->code[fs->pc-1], nresults); /* set number of results */ 196 if (fs->freereg > fs->f->maxstacksize) {
158 luaK_deltastack(fs, nresults); /* push results */ 197 if (fs->freereg >= MAXSTACK)
198 luaK_error(fs->ls, l_s("function or expression too complex"));
199 fs->f->maxstacksize = (short)fs->freereg;
159 } 200 }
160} 201}
161 202
162 203
163static int discharge (FuncState *fs, expdesc *var) { 204static void freereg (FuncState *fs, int reg) {
164 switch (var->k) { 205 if (reg >= fs->nactloc && reg < MAXSTACK) {
165 case VLOCAL: 206 fs->freereg--;
166 luaK_code1(fs, OP_GETLOCAL, var->u.index); 207 lua_assert(reg == fs->freereg);
167 break;
168 case VGLOBAL:
169 luaK_code1(fs, OP_GETGLOBAL, var->u.index);
170 break;
171 case VINDEXED:
172 luaK_code0(fs, OP_GETTABLE);
173 break;
174 case VEXP:
175 return 0; /* nothing to do */
176 } 208 }
177 var->k = VEXP;
178 var->u.l.t = var->u.l.f = NO_JUMP;
179 return 1;
180} 209}
181 210
182 211
183static void discharge1 (FuncState *fs, expdesc *var) { 212static void freeexp (FuncState *fs, expdesc *e) {
184 discharge(fs, var); 213 if (e->k == VNONRELOC)
185 /* if it has jumps then it is already discharged */ 214 freereg(fs, e->u.i.info);
186 if (var->u.l.t == NO_JUMP && var->u.l.f == NO_JUMP)
187 luaK_setcallreturns(fs, 1); /* call must return 1 value */
188} 215}
189 216
190 217
191void luaK_storevar (LexState *ls, const expdesc *var) { 218static int addk (FuncState *fs, TObject *k) {
192 FuncState *fs = ls->fs; 219 Proto *f = fs->f;
193 switch (var->k) { 220 luaM_growvector(fs->L, f->k, fs->nk, f->sizek, TObject,
194 case VLOCAL: 221 MAXARG_Bc, l_s("constant table overflow"));
195 luaK_code1(fs, OP_SETLOCAL, var->u.index); 222 setobj(&f->k[fs->nk], k);
196 break; 223 return fs->nk++;
197 case VGLOBAL: 224}
198 luaK_code1(fs, OP_SETGLOBAL, var->u.index); 225
199 break; 226
200 case VINDEXED: /* table is at top-3; pop 3 elements after operation */ 227int luaK_stringk (FuncState *fs, TString *s) {
201 luaK_code2(fs, OP_SETTABLE, 3, 3); 228 Proto *f = fs->f;
202 break; 229 int c = s->u.s.constindex;
203 default: 230 if (c >= fs->nk || ttype(&f->k[c]) != LUA_TSTRING || tsvalue(&f->k[c]) != s) {
204 lua_assert(0); /* invalid var kind to store */ 231 TObject o;
232 setsvalue(&o, s);
233 c = addk(fs, &o);
234 s->u.s.constindex = c; /* hint for next time */
205 } 235 }
236 return c;
206} 237}
207 238
208 239
209static OpCode invertjump (OpCode op) { 240static int number_constant (FuncState *fs, lua_Number r) {
210 switch (op) { 241 /* check whether `r' has appeared within the last LOOKBACKNUMS entries */
211 case OP_JMPNE: return OP_JMPEQ; 242 TObject o;
212 case OP_JMPEQ: return OP_JMPNE; 243 Proto *f = fs->f;
213 case OP_JMPLT: return OP_JMPGE; 244 int c = fs->nk;
214 case OP_JMPLE: return OP_JMPGT; 245 int lim = c < LOOKBACKNUMS ? 0 : c-LOOKBACKNUMS;
215 case OP_JMPGT: return OP_JMPLE; 246 while (--c >= lim) {
216 case OP_JMPGE: return OP_JMPLT; 247 if (ttype(&f->k[c]) == LUA_TNUMBER && nvalue(&f->k[c]) == r)
217 case OP_JMPT: case OP_JMPONT: return OP_JMPF; 248 return c;
218 case OP_JMPF: case OP_JMPONF: return OP_JMPT;
219 default:
220 lua_assert(0); /* invalid jump instruction */
221 return OP_JMP; /* to avoid warnings */
222 } 249 }
250 /* not found; create a new entry */
251 setnvalue(&o, r);
252 return addk(fs, &o);
223} 253}
224 254
225 255
226static void luaK_patchlistaux (FuncState *fs, int list, int target, 256void luaK_setcallreturns (FuncState *fs, expdesc *e, int nresults) {
227 OpCode special, int special_target) { 257 if (e->k == VCALL) { /* expression is an open function call? */
228 Instruction *code = fs->f->code; 258 SETARG_C(getcode(fs, e), nresults); /* set number of results */
229 while (list != NO_JUMP) { 259 if (nresults == 1) { /* `regular' expression? */
230 int next = luaK_getjump(fs, list); 260 e->k = VNONRELOC;
231 Instruction *i = &code[list]; 261 e->u.i.info = GETARG_A(getcode(fs, e));
232 OpCode op = GET_OPCODE(*i);
233 if (op == special) /* this `op' already has a value */
234 luaK_fixjump(fs, list, special_target);
235 else {
236 luaK_fixjump(fs, list, target); /* do the patch */
237 if (op == OP_JMPONT) /* remove eventual values */
238 SET_OPCODE(*i, OP_JMPT);
239 else if (op == OP_JMPONF)
240 SET_OPCODE(*i, OP_JMPF);
241 } 262 }
242 list = next;
243 } 263 }
244} 264}
245 265
246 266
247void luaK_patchlist (FuncState *fs, int list, int target) { 267static void dischargevars (FuncState *fs, expdesc *e) {
248 if (target == fs->lasttarget) /* same target that list `jlt'? */ 268 switch (e->k) {
249 luaK_concat(fs, &fs->jlt, list); /* delay fixing */ 269 case VLOCAL: {
250 else 270 e->k = VNONRELOC;
251 luaK_patchlistaux(fs, list, target, OP_ADD, 0); 271 break;
272 }
273 case VGLOBAL: {
274 e->u.i.info = luaK_codeABc(fs, OP_GETGLOBAL, 0, e->u.i.info);
275 e->k = VRELOCABLE;
276 break;
277 }
278 case VINDEXED: {
279 freereg(fs, e->u.i.aux);
280 freereg(fs, e->u.i.info);
281 e->u.i.info = luaK_codeABC(fs, OP_GETTABLE, 0, e->u.i.info, e->u.i.aux);
282 e->k = VRELOCABLE;
283 break;
284 }
285 case VCALL: {
286 luaK_setcallreturns(fs, e, 1);
287 break;
288 }
289 default: break; /* there is one value available (somewhere) */
290 }
252} 291}
253 292
254 293
255static int need_value (FuncState *fs, int list, OpCode hasvalue) { 294static int code_label (FuncState *fs, OpCode op, int A, int sBc) {
256 /* check whether list has a jump without a value */ 295 luaK_getlabel(fs); /* those instructions may be jump targets */
257 for (; list != NO_JUMP; list = luaK_getjump(fs, list)) 296 return luaK_codeAsBc(fs, op, A, sBc);
258 if (GET_OPCODE(fs->f->code[list]) != hasvalue) return 1;
259 return 0; /* not found */
260} 297}
261 298
262 299
263void luaK_concat (FuncState *fs, int *l1, int l2) { 300static void dischargejumps (FuncState *fs, expdesc *e, int reg) {
264 if (*l1 == NO_JUMP) 301 if (hasjumps(e)) {
265 *l1 = l2; 302 int final; /* position after whole expression */
266 else { 303 int p_nil = NO_JUMP; /* position of an eventual PUSHNIL */
267 int list = *l1; 304 int p_1 = NO_JUMP; /* position of an eventual PUSHINT */
268 int next; 305 if (need_value(fs, e->f, OP_TESTF) || need_value(fs, e->t, OP_TESTT)) {
269 while ((next = luaK_getjump(fs, list)) != NO_JUMP) /* find last element */ 306 /* expression needs values */
270 list = next; 307 if (e->k != VJMP)
271 luaK_fixjump(fs, list, l2); 308 code_label(fs, OP_JMP, 0, 2); /* to jump over both pushes */
309 p_nil = code_label(fs, OP_NILJMP, reg, 0);
310 p_1 = code_label(fs, OP_LOADINT, reg, 1);
311 }
312 final = luaK_getlabel(fs);
313 luaK_patchlistaux(fs, e->f, p_nil, NO_REG, final, reg, p_nil);
314 luaK_patchlistaux(fs, e->t, final, reg, p_1, NO_REG, p_1);
272 } 315 }
316 e->f = e->t = NO_JUMP;
273} 317}
274 318
275 319
276static void luaK_testgo (FuncState *fs, expdesc *v, int invert, OpCode jump) { 320static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
277 int prevpos; /* position of last instruction */ 321 dischargevars(fs, e);
278 Instruction *previous; 322 switch (e->k) {
279 int *golist, *exitlist; 323 case VNIL: {
280 if (!invert) { 324 luaK_nil(fs, reg, 1);
281 golist = &v->u.l.f; /* go if false */ 325 break;
282 exitlist = &v->u.l.t; /* exit if true */ 326 }
283 } 327 case VNUMBER: {
284 else { 328 lua_Number f = e->u.n;
285 golist = &v->u.l.t; /* go if true */ 329 int i = (int)f;
286 exitlist = &v->u.l.f; /* exit if false */ 330 if ((lua_Number)i == f && -MAXARG_sBc <= i && i <= MAXARG_sBc)
331 luaK_codeAsBc(fs, OP_LOADINT, reg, i); /* f has a small int value */
332 else
333 luaK_codeABc(fs, OP_LOADK, reg, number_constant(fs, f));
334 break;
335 }
336 case VK: {
337 luaK_codeABc(fs, OP_LOADK, reg, e->u.i.info);
338 break;
339 }
340 case VRELOCABLE: {
341 Instruction *pc = &getcode(fs, e);
342 SETARG_A(*pc, reg);
343 break;
344 }
345 default: return;
287 } 346 }
288 discharge1(fs, v); 347 e->u.i.info = reg;
289 prevpos = fs->pc-1; 348 e->k = VNONRELOC;
290 previous = &fs->f->code[prevpos]; 349}
291 lua_assert(*previous==previous_instruction(fs)); /* no jump allowed here */ 350
292 if (!ISJUMP(GET_OPCODE(*previous))) 351
293 prevpos = luaK_code1(fs, jump, NO_JUMP); 352static void discharge2anyreg (FuncState *fs, expdesc *e) {
294 else { /* last instruction is already a jump */ 353 if (e->k != VNONRELOC) {
295 if (invert) 354 luaK_reserveregs(fs, 1);
296 SET_OPCODE(*previous, invertjump(GET_OPCODE(*previous))); 355 discharge2reg(fs, e, fs->freereg-1);
297 } 356 }
298 luaK_concat(fs, exitlist, prevpos); /* insert last jump in `exitlist' */
299 luaK_patchlist(fs, *golist, luaK_getlabel(fs));
300 *golist = NO_JUMP;
301} 357}
302 358
303 359
304void luaK_goiftrue (FuncState *fs, expdesc *v, int keepvalue) { 360static void luaK_exp2reg (FuncState *fs, expdesc *e, int reg) {
305 luaK_testgo(fs, v, 1, keepvalue ? OP_JMPONF : OP_JMPF); 361 discharge2reg(fs, e, reg);
362 switch (e->k) {
363 case VVOID: {
364 return; /* nothing to do... */
365 }
366 case VNONRELOC: {
367 if (reg != e->u.i.info)
368 luaK_codeABC(fs, OP_MOVE, reg, e->u.i.info, 0);
369 break;
370 }
371 case VJMP: {
372 luaK_concat(fs, &e->t, e->u.i.info); /* put this jump in `t' list */
373 break;
374 }
375 default: {
376 lua_assert(0); /* cannot happen */
377 break;
378 }
379 }
380 dischargejumps(fs, e, reg);
381 e->u.i.info = reg;
382 e->k = VNONRELOC;
306} 383}
307 384
308 385
309static void luaK_goiffalse (FuncState *fs, expdesc *v) { 386void luaK_exp2nextreg (FuncState *fs, expdesc *e) {
310 luaK_testgo(fs, v, 0, OP_JMPONT); 387 int reg;
388 dischargevars(fs, e);
389 freeexp(fs, e);
390 reg = fs->freereg;
391 luaK_reserveregs(fs, 1);
392 luaK_exp2reg(fs, e, reg);
311} 393}
312 394
313 395
314static int code_label (FuncState *fs, OpCode op, int arg) { 396int luaK_exp2anyreg (FuncState *fs, expdesc *e) {
315 luaK_getlabel(fs); /* those instructions may be jump targets */ 397 dischargevars(fs, e);
316 return luaK_code1(fs, op, arg); 398 if (e->k == VNONRELOC) {
317} 399 if (!hasjumps(e)) return e->u.i.info; /* exp is already in a register */
318 400 if (e->u.i.info >= fs->nactloc) { /* reg. is not a local? */
319 401 dischargejumps(fs, e, e->u.i.info); /* put value on it */
320void luaK_tostack (LexState *ls, expdesc *v, int onlyone) { 402 return e->u.i.info;
321 FuncState *fs = ls->fs;
322 if (!discharge(fs, v)) { /* `v' is an expression? */
323 OpCode previous = GET_OPCODE(fs->f->code[fs->pc-1]);
324 if (!ISJUMP(previous) && v->u.l.f == NO_JUMP && v->u.l.t == NO_JUMP) {
325 /* expression has no jumps */
326 if (onlyone)
327 luaK_setcallreturns(fs, 1); /* call must return 1 value */
328 }
329 else { /* expression has jumps */
330 int final; /* position after whole expression */
331 int j = NO_JUMP; /* eventual jump over values */
332 int p_nil = NO_JUMP; /* position of an eventual PUSHNIL */
333 int p_1 = NO_JUMP; /* position of an eventual PUSHINT */
334 if (ISJUMP(previous) || need_value(fs, v->u.l.f, OP_JMPONF)
335 || need_value(fs, v->u.l.t, OP_JMPONT)) {
336 /* expression needs values */
337 if (ISJUMP(previous))
338 luaK_concat(fs, &v->u.l.t, fs->pc-1); /* put `previous' in t. list */
339 else {
340 j = code_label(fs, OP_JMP, NO_JUMP); /* to jump over both pushes */
341 /* correct stack for compiler and symbolic execution */
342 luaK_adjuststack(fs, 1);
343 }
344 p_nil = code_label(fs, OP_PUSHNILJMP, 0);
345 p_1 = code_label(fs, OP_PUSHINT, 1);
346 luaK_patchlist(fs, j, luaK_getlabel(fs));
347 }
348 final = luaK_getlabel(fs);
349 luaK_patchlistaux(fs, v->u.l.f, p_nil, OP_JMPONF, final);
350 luaK_patchlistaux(fs, v->u.l.t, p_1, OP_JMPONT, final);
351 v->u.l.f = v->u.l.t = NO_JUMP;
352 } 403 }
353 } 404 }
405 luaK_exp2nextreg(fs, e); /* default */
406 return e->u.i.info;
354} 407}
355 408
356 409
357void luaK_prefix (LexState *ls, UnOpr op, expdesc *v) { 410void luaK_exp2val (FuncState *fs, expdesc *e) {
358 FuncState *fs = ls->fs; 411 if (hasjumps(e))
359 if (op == OPR_MINUS) { 412 luaK_exp2anyreg(fs, e);
360 luaK_tostack(ls, v, 1); 413 else
361 luaK_code0(fs, OP_MINUS); 414 dischargevars(fs, e);
362 }
363 else { /* op == NOT */
364 Instruction *previous;
365 discharge1(fs, v);
366 previous = &fs->f->code[fs->pc-1];
367 if (ISJUMP(GET_OPCODE(*previous)))
368 SET_OPCODE(*previous, invertjump(GET_OPCODE(*previous)));
369 else
370 luaK_code0(fs, OP_NOT);
371 /* interchange true and false lists */
372 { int temp = v->u.l.f; v->u.l.f = v->u.l.t; v->u.l.t = temp; }
373 }
374} 415}
375 416
376 417
377void luaK_infix (LexState *ls, BinOpr op, expdesc *v) { 418int luaK_exp2RK (FuncState *fs, expdesc *e) {
378 FuncState *fs = ls->fs; 419 luaK_exp2val(fs, e);
379 switch (op) { 420 if (e->k == VNUMBER && fs->nk + MAXSTACK <= MAXARG_C) {
380 case OPR_AND: 421 e->u.i.info = number_constant(fs, e->u.n);
381 luaK_goiftrue(fs, v, 1); 422 e->k = VK;
382 break;
383 case OPR_OR:
384 luaK_goiffalse(fs, v);
385 break;
386 default:
387 luaK_tostack(ls, v, 1); /* all other binary operators need a value */
388 } 423 }
424 else if (!(e->k == VK && e->u.i.info + MAXSTACK <= MAXARG_C))
425 luaK_exp2anyreg(fs, e); /* not a constant in the right range */
426 return (e->k == VK) ? e->u.i.info+MAXSTACK : e->u.i.info;
389} 427}
390 428
391 429
392 430void luaK_storevar (FuncState *fs, expdesc *var, expdesc *exp) {
393static const struct { 431 switch (var->k) {
394 OpCode opcode; /* opcode for each binary operator */ 432 case VLOCAL: {
395 int arg; /* default argument for the opcode */ 433 freeexp(fs, exp);
396} codes[] = { /* ORDER OPR */ 434 luaK_exp2reg(fs, exp, var->u.i.info);
397 {OP_ADD, 0}, {OP_SUB, 0}, {OP_MULT, 0}, {OP_DIV, 0},
398 {OP_POW, 0}, {OP_CONCAT, 2},
399 {OP_JMPNE, NO_JUMP}, {OP_JMPEQ, NO_JUMP},
400 {OP_JMPLT, NO_JUMP}, {OP_JMPLE, NO_JUMP},
401 {OP_JMPGT, NO_JUMP}, {OP_JMPGE, NO_JUMP}
402};
403
404
405void luaK_posfix (LexState *ls, BinOpr op, expdesc *v1, expdesc *v2) {
406 FuncState *fs = ls->fs;
407 switch (op) {
408 case OPR_AND: {
409 lua_assert(v1->u.l.t == NO_JUMP); /* list must be closed */
410 discharge1(fs, v2);
411 v1->u.l.t = v2->u.l.t;
412 luaK_concat(fs, &v1->u.l.f, v2->u.l.f);
413 break; 435 break;
414 } 436 }
415 case OPR_OR: { 437 case VGLOBAL: {
416 lua_assert(v1->u.l.f == NO_JUMP); /* list must be closed */ 438 int e = luaK_exp2anyreg(fs, exp);
417 discharge1(fs, v2); 439 freereg(fs, e);
418 v1->u.l.f = v2->u.l.f; 440 luaK_codeABc(fs, OP_SETGLOBAL, e, var->u.i.info);
419 luaK_concat(fs, &v1->u.l.t, v2->u.l.t); 441 break;
442 }
443 case VINDEXED: {
444 int e = luaK_exp2anyreg(fs, exp);
445 freereg(fs, e);
446 luaK_codeABC(fs, OP_SETTABLE, e, var->u.i.info, var->u.i.aux);
420 break; 447 break;
421 } 448 }
422 default: { 449 default: {
423 luaK_tostack(ls, v2, 1); /* `v2' must be a value */ 450 lua_assert(0); /* invalid var kind to store */
424 luaK_code1(fs, codes[op].opcode, codes[op].arg); 451 break;
425 } 452 }
426 } 453 }
427} 454}
428 455
429 456
430static void codelineinfo (FuncState *fs) { 457void luaK_self (FuncState *fs, expdesc *e, expdesc *key) {
431 Proto *f = fs->f; 458 luaK_exp2anyreg(fs, e);
432 LexState *ls = fs->ls; 459 freeexp(fs, e);
433 if (ls->lastline > fs->lastline) { 460 luaK_reserveregs(fs, 2);
434 if (ls->lastline > fs->lastline+1) { 461 luaK_codeABC(fs, OP_SELF, fs->freereg-2, e->u.i.info, luaK_exp2RK(fs, key));
435 luaM_growvector(fs->L, f->lineinfo, fs->nlineinfo, f->sizelineinfo, int, 462 e->u.i.info = fs->freereg-2;
436 MAX_INT, l_s("line info overflow")); 463 e->k = VNONRELOC;
437 f->lineinfo[fs->nlineinfo++] = -(ls->lastline - (fs->lastline+1)); 464}
438 } 465
439 luaM_growvector(fs->L, f->lineinfo, fs->nlineinfo, f->sizelineinfo, int, 466
440 MAX_INT, l_s("line info overflow")); 467static OpCode invertoperator (OpCode op) {
441 f->lineinfo[fs->nlineinfo++] = fs->pc; 468 switch (op) {
442 fs->lastline = ls->lastline; 469 case OP_TESTNE: return OP_TESTEQ;
470 case OP_TESTEQ: return OP_TESTNE;
471 case OP_TESTLT: return OP_TESTGE;
472 case OP_TESTLE: return OP_TESTGT;
473 case OP_TESTGT: return OP_TESTLE;
474 case OP_TESTGE: return OP_TESTLT;
475 case OP_TESTT: return OP_TESTF;
476 case OP_TESTF: return OP_TESTT;
477 default: lua_assert(0); return op; /* invalid jump instruction */
443 } 478 }
444} 479}
445 480
446 481
447int luaK_code0 (FuncState *fs, OpCode o) { 482static void invertjump (FuncState *fs, expdesc *e) {
448 return luaK_code2(fs, o, 0, 0); 483 Instruction *pc = getjumpcontrol(fs, e->u.i.info);
484 *pc = SET_OPCODE(*pc, invertoperator(GET_OPCODE(*pc)));
449} 485}
450 486
451 487
452int luaK_code1 (FuncState *fs, OpCode o, int arg1) { 488static int jumponcond (FuncState *fs, expdesc *e, OpCode op) {
453 return luaK_code2(fs, o, arg1, 0); 489 if (e->k == VRELOCABLE) {
490 Instruction ie = getcode(fs, e);
491 if (GET_OPCODE(ie) == OP_NOT) {
492 op = invertoperator(op);
493 fs->pc--; /* remove previous OP_NOT */
494 return luaK_condjump(fs, op, GETARG_B(ie), 0);
495 }
496 /* else go through */
497 }
498 discharge2anyreg(fs, e);
499 freeexp(fs, e);
500 return luaK_condjump(fs, op, e->u.i.info, 0);
454} 501}
455 502
456 503
457int luaK_code2 (FuncState *fs, OpCode o, int arg1, int arg2) { 504void luaK_goiftrue (FuncState *fs, expdesc *e) {
458 Proto *f; 505 int pc; /* pc of last jump */
459 Instruction i = previous_instruction(fs); 506 dischargevars(fs, e);
460 int push = (int)luaK_opproperties[o].push; 507 switch (e->k) {
461 int pop = (int)luaK_opproperties[o].pop; 508 case VK: case VNUMBER: {
462 int optm = 0; /* 1 when there is an optimization */ 509 pc = NO_JUMP; /* always true; do nothing */
463 switch (o) {
464 case OP_CLOSURE: {
465 pop = arg2;
466 break; 510 break;
467 } 511 }
468 case OP_SETTABLE: { 512 case VNIL: {
469 pop = arg2; 513 pc = luaK_codeAsBc(fs, OP_JMP, 0, NO_JUMP); /* always jump */
470 break; 514 break;
471 } 515 }
472 case OP_SETLIST: { 516 case VJMP: {
473 pop = fs->stacklevel - 1 - arg2; 517 invertjump(fs, e);
518 pc = e->u.i.info;
474 break; 519 break;
475 } 520 }
476 case OP_SETMAP: { 521 case VRELOCABLE:
477 pop = fs->stacklevel - 1 - arg1; 522 case VNONRELOC: {
523 pc = jumponcond(fs, e, OP_TESTF);
478 break; 524 break;
479 } 525 }
480 case OP_PUSHNIL: { 526 default: {
481 if (arg1 == 0) return NO_JUMP; /* nothing to do */ 527 pc = 0; /* to avoid warnings */
482 push = arg1; 528 lua_assert(0); /* cannot happen */
483 switch(GET_OPCODE(i)) {
484 case OP_PUSHNIL: SETARG_U(i, GETARG_U(i)+arg1); optm = 1; break;
485 default: break;
486 }
487 break; 529 break;
488 } 530 }
489 case OP_POP: { 531 }
490 if (arg1 == 0) return NO_JUMP; /* nothing to do */ 532 luaK_concat(fs, &e->f, pc); /* insert last jump in `f' list */
491 pop = arg1; 533 luaK_patchlist(fs, e->t, luaK_getlabel(fs));
492 switch(GET_OPCODE(i)) { 534 e->t = NO_JUMP;
493 case OP_SETTABLE: SETARG_B(i, GETARG_B(i)+arg1); optm = 1; break; 535}
494 default: break; 536
495 } 537
538static void luaK_goiffalse (FuncState *fs, expdesc *e) {
539 int pc; /* pc of last jump */
540 dischargevars(fs, e);
541 switch (e->k) {
542 case VNIL: {
543 pc = NO_JUMP; /* always false; do nothing */
496 break; 544 break;
497 } 545 }
498 case OP_GETTABLE: { 546 case VJMP: {
499 switch(GET_OPCODE(i)) { 547 pc = e->u.i.info;
500 case OP_PUSHSTRING: /* `t.x' */
501 SET_OPCODE(i, OP_GETDOTTED);
502 optm = 1;
503 break;
504 case OP_GETLOCAL: /* `t[i]' */
505 SET_OPCODE(i, OP_GETINDEXED);
506 optm = 1;
507 break;
508 default: break;
509 }
510 break; 548 break;
511 } 549 }
512 case OP_ADD: { 550 case VK: case VNUMBER: /* cannot optimize it (`or' must keep value) */
513 switch(GET_OPCODE(i)) { 551 case VRELOCABLE:
514 case OP_PUSHINT: SET_OPCODE(i, OP_ADDI); optm = 1; break; /* `a+k' */ 552 case VNONRELOC: {
515 default: break; 553 pc = jumponcond(fs, e, OP_TESTT);
516 }
517 break; 554 break;
518 } 555 }
519 case OP_SUB: { 556 default: {
520 switch(GET_OPCODE(i)) { 557 pc = 0; /* to avoid warnings */
521 case OP_PUSHINT: /* `a-k' */ 558 lua_assert(0); /* cannot happen */
522 i = CREATE_S(OP_ADDI, -GETARG_S(i));
523 optm = 1;
524 break;
525 default: break;
526 }
527 break; 559 break;
528 } 560 }
529 case OP_CONCAT: { 561 }
530 pop = arg1; 562 luaK_concat(fs, &e->t, pc); /* insert last jump in `t' list */
531 switch(GET_OPCODE(i)) { 563 luaK_patchlist(fs, e->f, luaK_getlabel(fs));
532 case OP_CONCAT: /* `a..b..c' */ 564 e->f = NO_JUMP;
533 SETARG_U(i, GETARG_U(i)+1); 565}
534 optm = 1; 566
535 break; 567
536 default: break; 568static void codenot (FuncState *fs, expdesc *e) {
537 } 569 dischargevars(fs, e);
570 switch (e->k) {
571 case VNIL: {
572 e->u.n = 1;
573 e->k = VNUMBER;
538 break; 574 break;
539 } 575 }
540 case OP_MINUS: { 576 case VK: case VNUMBER: {
541 switch(GET_OPCODE(i)) { 577 e->k = VNIL;
542 case OP_PUSHINT: /* `-k' */
543 SETARG_S(i, -GETARG_S(i));
544 optm = 1;
545 break;
546 case OP_PUSHNUM: /* `-k' */
547 SET_OPCODE(i, OP_PUSHNEGNUM);
548 optm = 1;
549 break;
550 default: break;
551 }
552 break; 578 break;
553 } 579 }
554 case OP_JMPNE: { 580 case VJMP: {
555 if (i == CREATE_U(OP_PUSHNIL, 1)) { /* `a~=nil' */ 581 invertjump(fs, e);
556 i = CREATE_S(OP_JMPT, NO_JUMP);
557 optm = 1;
558 }
559 break; 582 break;
560 } 583 }
561 case OP_JMPEQ: { 584 case VRELOCABLE:
562 if (i == CREATE_U(OP_PUSHNIL, 1)) { /* `a==nil' */ 585 case VNONRELOC: {
563 i = CREATE_0(OP_NOT); 586 discharge2anyreg(fs, e);
564 pop = 1; /* just undo effect of previous PUSHNIL */ 587 freeexp(fs, e);
565 optm = 1; 588 e->u.i.info = luaK_codeABC(fs, OP_NOT, 0, e->u.i.info, 0);
566 } 589 e->k = VRELOCABLE;
567 break; 590 break;
568 } 591 }
569 case OP_JMPT: 592 default: {
570 case OP_JMPONT: { 593 lua_assert(0); /* cannot happen */
571 switch (GET_OPCODE(i)) {
572 case OP_NOT: {
573 i = CREATE_S(OP_JMPF, NO_JUMP);
574 optm = 1;
575 break;
576 }
577 case OP_PUSHINT: {
578 if (o == OP_JMPT) { /* JMPONT must keep original integer value */
579 i = CREATE_S(OP_JMP, NO_JUMP);
580 optm = 1;
581 }
582 break;
583 }
584 case OP_PUSHNIL: {
585 if (GETARG_U(i) == 1) {
586 fs->pc--; /* erase previous instruction */
587 luaK_deltastack(fs, -1); /* correct stack */
588 return NO_JUMP;
589 }
590 break;
591 }
592 default: break;
593 }
594 break; 594 break;
595 } 595 }
596 case OP_JMPF: 596 }
597 case OP_JMPONF: { 597 /* interchange true and false lists */
598 switch (GET_OPCODE(i)) { 598 { int temp = e->f; e->f = e->t; e->t = temp; }
599 case OP_NOT: { 599}
600 i = CREATE_S(OP_JMPT, NO_JUMP); 600
601 optm = 1; 601
602 break; 602void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {
603 } 603 t->u.i.aux = luaK_exp2RK(fs, k);
604 case OP_PUSHINT: { /* `while 1 do ...' */ 604 t->k = VINDEXED;
605 fs->pc--; /* erase previous instruction */ 605}
606 luaK_deltastack(fs, -1); /* correct stack */ 606
607 return NO_JUMP; 607
608 } 608void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) {
609 case OP_PUSHNIL: { /* `repeat ... until nil' */ 609 if (op == OPR_MINUS) {
610 if (GETARG_U(i) == 1) { 610 luaK_exp2val(fs, e);
611 i = CREATE_S(OP_JMP, NO_JUMP); 611 if (e->k == VNUMBER)
612 optm = 1; 612 e->u.n = -e->u.n;
613 } 613 else {
614 break; 614 luaK_exp2anyreg(fs, e);
615 } 615 freeexp(fs, e);
616 default: break; 616 e->u.i.info = luaK_codeABC(fs, OP_UNM, 0, e->u.i.info, 0);
617 } 617 e->k = VRELOCABLE;
618 }
619 }
620 else /* op == NOT */
621 codenot(fs, e);
622}
623
624
625void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
626 switch (op) {
627 case OPR_AND: {
628 luaK_goiftrue(fs, v);
629 break;
630 }
631 case OPR_OR: {
632 luaK_goiffalse(fs, v);
633 break;
634 }
635 case OPR_CONCAT: {
636 luaK_exp2nextreg(fs, v); /* operand must be on the `stack' */
618 break; 637 break;
619 } 638 }
620 case OP_GETDOTTED: 639 case OPR_SUB: case OPR_DIV: case OPR_POW: {
621 case OP_GETINDEXED: 640 /* non-comutative operators */
622 case OP_ADDI: { 641 luaK_exp2anyreg(fs, v); /* first operand must be a register */
623 lua_assert(0); /* instruction used only for optimizations */
624 break; 642 break;
625 } 643 }
626 default: { 644 default: {
645 luaK_exp2RK(fs, v);
627 break; 646 break;
628 } 647 }
629 } 648 }
630 f = fs->f; 649}
631 lua_assert(push != VD); 650
632 lua_assert(pop != VD); 651
633 luaK_deltastack(fs, push); 652
634 luaK_deltastack(fs, -pop); 653/* opcode for each binary operator */
635 if (optm) { /* optimize: put instruction in place of last one */ 654static const OpCode codes[] = { /* ORDER OPR */
636 f->code[fs->pc-1] = i; /* change previous instruction */ 655 OP_ADD, OP_SUB, OP_MUL, OP_DIV,
637 return fs->pc-1; /* do not generate new instruction */ 656 OP_POW, OP_CONCAT,
657 OP_TESTNE, OP_TESTEQ,
658 OP_TESTLT, OP_TESTLE, OP_TESTGT, OP_TESTGE
659};
660
661
662/* `inverted' opcode for each binary operator */
663/* ( -1 means operator has no inverse) */
664static const OpCode invcodes[] = { /* ORDER OPR */
665 OP_ADD, (OpCode)-1, OP_MUL, (OpCode)-1,
666 (OpCode)-1, (OpCode)-1,
667 OP_TESTNE, OP_TESTEQ,
668 OP_TESTGT, OP_TESTGE, OP_TESTLT, OP_TESTLE
669};
670
671
672void luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2) {
673 switch (op) {
674 case OPR_AND: {
675 lua_assert(e1->t == NO_JUMP); /* list must be closed */
676 dischargevars(fs, e2);
677 luaK_concat(fs, &e1->f, e2->f);
678 e1->k = e2->k; e1->u = e2->u; e1->t = e2->t;
679 break;
680 }
681 case OPR_OR: {
682 lua_assert(e1->f == NO_JUMP); /* list must be closed */
683 dischargevars(fs, e2);
684 luaK_concat(fs, &e1->t, e2->t);
685 e1->k = e2->k; e1->u = e2->u; e1->f = e2->f;
686 break;
687 }
688 case OPR_CONCAT: {
689 luaK_exp2val(fs, e2);
690 if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {
691 lua_assert(e1->u.i.info == GETARG_B(getcode(fs, e2))-1);
692 freeexp(fs, e1);
693 SETARG_B(getcode(fs, e2), e1->u.i.info);
694 e1->k = e2->k; e1->u.i.info = e2->u.i.info;
695 }
696 else {
697 luaK_exp2nextreg(fs, e2);
698 freeexp(fs, e2);
699 freeexp(fs, e1);
700 e1->u.i.info = luaK_codeABC(fs, codes[op], 0, e1->u.i.info,
701 e2->u.i.info);
702 e1->k = VRELOCABLE;
703 }
704 break;
705 }
706 case OPR_EQ: case OPR_NE: {
707 luaK_exp2val(fs, e2);
708 if (e2->k == VNIL) { /* exp x= nil ? */
709 if (e1->k == VK) { /* constant x= nil ? */
710 if (op == OPR_EQ) /* constant == nil ? */
711 e1->k = VNIL; /* always false */
712 /* else always true (leave the constant itself) */
713 }
714 else {
715 OpCode opc = (op == OPR_EQ) ? OP_TESTF : OP_TESTT;
716 e1->u.i.info = jumponcond(fs, e1, opc);
717 e1->k = VJMP;
718 }
719 break;
720 }
721 /* else go through */
722 }
723 default: {
724 int o1, o2;
725 OpCode opc;
726 if (e1->k != VK) { /* not a constant operator? */
727 o1 = e1->u.i.info;
728 o2 = luaK_exp2RK(fs, e2); /* maybe other operator is constant... */
729 opc = codes[op];
730 }
731 else { /* invert operands */
732 o2 = luaK_exp2RK(fs, e1); /* constant must be 2nd operand */
733 o1 = luaK_exp2anyreg(fs, e2); /* other operator must be in register */
734 opc = invcodes[op]; /* use inverted operator */
735 }
736 freeexp(fs, e2);
737 freeexp(fs, e1);
738 if (op < OPR_NE) { /* ORDER OPR */
739 e1->u.i.info = luaK_codeABC(fs, opc, 0, o1, o2);
740 e1->k = VRELOCABLE;
741 }
742 else { /* jump */
743 e1->u.i.info = luaK_condjump(fs, opc, o1, o2);
744 e1->k = VJMP;
745 }
746 }
638 } 747 }
639 /* else build new instruction */ 748}
640 switch ((enum Mode)luaK_opproperties[o].mode) { 749
641 case iO: i = CREATE_0(o); break; 750
642 case iU: i = CREATE_U(o, arg1); break; 751static void codelineinfo (FuncState *fs) {
643 case iS: i = CREATE_S(o, arg1); break; 752 Proto *f = fs->f;
644 case iAB: i = CREATE_AB(o, arg1, arg2); break; 753 LexState *ls = fs->ls;
754 if (ls->lastline > fs->lastline) {
755 if (ls->lastline > fs->lastline+1) {
756 luaM_growvector(fs->L, f->lineinfo, fs->nlineinfo, f->sizelineinfo, int,
757 MAX_INT, l_s("line info overflow"));
758 f->lineinfo[fs->nlineinfo++] = -(ls->lastline - (fs->lastline+1));
759 }
760 luaM_growvector(fs->L, f->lineinfo, fs->nlineinfo, f->sizelineinfo, int,
761 MAX_INT, l_s("line info overflow"));
762 f->lineinfo[fs->nlineinfo++] = fs->pc;
763 fs->lastline = ls->lastline;
645 } 764 }
765}
766
767
768static int luaK_code (FuncState *fs, Instruction i) {
769 Proto *f;
646 codelineinfo(fs); 770 codelineinfo(fs);
771 f = fs->f;
647 /* put new instruction in code array */ 772 /* put new instruction in code array */
648 luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction, 773 luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction,
649 MAX_INT, l_s("code size overflow")); 774 MAX_INT, l_s("code size overflow"));
650 f->code[fs->pc] = i; 775 f->code[fs->pc] = i;
776/*printf("free: %d ", fs->freereg); printopcode(f, fs->pc);*/
651 return fs->pc++; 777 return fs->pc++;
652} 778}
653 779
654 780
655const OpProperties luaK_opproperties[] = { 781int luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c) {
656 {iU, 0, 0}, /* OP_RETURN */ 782 lua_assert(getOpMode(o) == iABC);
657 {iAB, 0, 0}, /* OP_CALL */ 783 return luaK_code(fs, CREATE_ABC(o, a, b, c));
658 {iU, VD, 0}, /* OP_PUSHNIL */ 784}
659 {iU, 0, VD}, /* OP_POP */ 785
660 {iS, 1, 0}, /* OP_PUSHINT */ 786
661 {iU, 1, 0}, /* OP_PUSHSTRING */ 787int luaK_codeABc (FuncState *fs, OpCode o, int a, int bc) {
662 {iU, 1, 0}, /* OP_PUSHNUM */ 788 lua_assert(getOpMode(o) == iABc || getOpMode(o) == iAsBc);
663 {iU, 1, 0}, /* OP_PUSHNEGNUM */ 789 return luaK_code(fs, CREATE_ABc(o, a, bc));
664 {iU, 1, 0}, /* OP_PUSHUPVALUE */ 790}
665 {iU, 1, 0}, /* OP_GETLOCAL */
666 {iU, 1, 0}, /* OP_GETGLOBAL */
667 {iO, 1, 2}, /* OP_GETTABLE */
668 {iU, 1, 1}, /* OP_GETDOTTED */
669 {iU, 1, 1}, /* OP_GETINDEXED */
670 {iU, 2, 1}, /* OP_PUSHSELF */
671 {iU, 1, 0}, /* OP_CREATETABLE */
672 {iU, 0, 1}, /* OP_SETLOCAL */
673 {iU, 0, 1}, /* OP_SETGLOBAL */
674 {iAB, 0, VD}, /* OP_SETTABLE */
675 {iAB, 0, VD}, /* OP_SETLIST */
676 {iU, 0, VD}, /* OP_SETMAP */
677 {iO, 1, 2}, /* OP_ADD */
678 {iS, 1, 1}, /* OP_ADDI */
679 {iO, 1, 2}, /* OP_SUB */
680 {iO, 1, 2}, /* OP_MULT */
681 {iO, 1, 2}, /* OP_DIV */
682 {iO, 1, 2}, /* OP_POW */
683 {iU, 1, VD}, /* OP_CONCAT */
684 {iO, 1, 1}, /* OP_MINUS */
685 {iO, 1, 1}, /* OP_NOT */
686 {iS, 0, 2}, /* OP_JMPNE */
687 {iS, 0, 2}, /* OP_JMPEQ */
688 {iS, 0, 2}, /* OP_JMPLT */
689 {iS, 0, 2}, /* OP_JMPLE */
690 {iS, 0, 2}, /* OP_JMPGT */
691 {iS, 0, 2}, /* OP_JMPGE */
692 {iS, 0, 1}, /* OP_JMPT */
693 {iS, 0, 1}, /* OP_JMPF */
694 {iS, 0, 1}, /* OP_JMPONT */
695 {iS, 0, 1}, /* OP_JMPONF */
696 {iS, 0, 0}, /* OP_JMP */
697 {iO, 0, 0}, /* OP_PUSHNILJMP */
698 {iS, 0, 0}, /* OP_FORPREP */
699 {iS, 0, 3}, /* OP_FORLOOP */
700 {iS, 3, 0}, /* OP_LFORPREP */
701 {iS, 0, 4}, /* OP_LFORLOOP */
702 {iAB, 1, VD} /* OP_CLOSURE */
703};
704 791
diff --git a/lcode.h b/lcode.h
index b73e9947..e82d1b17 100644
--- a/lcode.h
+++ b/lcode.h
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lcode.h,v 1.20 2001/02/20 18:15:33 roberto Exp roberto $ 2** $Id: lcode.h,v 1.21 2001/02/23 17:17:25 roberto Exp roberto $
3** Code generator for Lua 3** Code generator for Lua
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -31,43 +31,36 @@ typedef enum BinOpr {
31 OPR_NOBINOPR 31 OPR_NOBINOPR
32} BinOpr; 32} BinOpr;
33 33
34typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_NOUNOPR } UnOpr; 34#define binopistest(op) ((op) >= OPR_NE)
35
36
37enum Mode {iO, iU, iS, iAB}; /* instruction format */
38 35
39#define VD 100 /* flag for variable delta */ 36typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_NOUNOPR } UnOpr;
40
41typedef struct OpProperties {
42 lu_byte mode;
43 lu_byte push;
44 lu_byte pop;
45} OpProperties;
46 37
47extern const OpProperties luaK_opproperties[];
48 38
39#define luaK_codeAsBc(fs,o,A,sBc) luaK_codeABc(fs,o,A,(sBc)+MAXARG_sBc)
49 40
50void luaK_error (LexState *ls, const l_char *msg); 41void luaK_error (LexState *ls, const l_char *msg);
51int luaK_code0 (FuncState *fs, OpCode o); 42int luaK_codeABc (FuncState *fs, OpCode o, int A, int Bc);
52int luaK_code1 (FuncState *fs, OpCode o, int arg1); 43int luaK_codeABC (FuncState *fs, OpCode o, int A, int B, int C);
53int luaK_code2 (FuncState *fs, OpCode o, int arg1, int arg2); 44void luaK_nil (FuncState *fs, int from, int n);
45void luaK_reserveregs (FuncState *fs, int n);
46int luaK_stringk (FuncState *fs, TString *s);
47int luaK_exp2anyreg (FuncState *fs, expdesc *e);
48void luaK_exp2nextreg (FuncState *fs, expdesc *e);
49void luaK_exp2val (FuncState *fs, expdesc *e);
50int luaK_exp2RK (FuncState *fs, expdesc *e);
51void luaK_self (FuncState *fs, expdesc *e, expdesc *key);
52void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k);
53void luaK_goiftrue (FuncState *fs, expdesc *e);
54void luaK_storevar (FuncState *fs, expdesc *var, expdesc *e);
55void luaK_setcallreturns (FuncState *fs, expdesc *var, int nresults);
54int luaK_jump (FuncState *fs); 56int luaK_jump (FuncState *fs);
55void luaK_patchlist (FuncState *fs, int list, int target); 57void luaK_patchlist (FuncState *fs, int list, int target);
56void luaK_fixfor (FuncState *fs, int pc, int dest); 58void luaK_fixfor (FuncState *fs, int pc, int dest);
57void luaK_concat (FuncState *fs, int *l1, int l2); 59void luaK_concat (FuncState *fs, int *l1, int l2);
58void luaK_goiftrue (FuncState *fs, expdesc *v, int keepvalue);
59int luaK_getlabel (FuncState *fs); 60int luaK_getlabel (FuncState *fs);
60void luaK_deltastack (FuncState *fs, int delta); 61void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v);
61void luaK_kstr (LexState *ls, int c); 62void luaK_infix (FuncState *fs, BinOpr op, expdesc *v);
62void luaK_number (FuncState *fs, lua_Number f); 63void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1, expdesc *v2);
63void luaK_adjuststack (FuncState *fs, int n);
64int luaK_lastisopen (FuncState *fs);
65void luaK_setcallreturns (FuncState *fs, int nresults);
66void luaK_tostack (LexState *ls, expdesc *v, int onlyone);
67void luaK_storevar (LexState *ls, const expdesc *var);
68void luaK_prefix (LexState *ls, UnOpr op, expdesc *v);
69void luaK_infix (LexState *ls, BinOpr op, expdesc *v);
70void luaK_posfix (LexState *ls, BinOpr op, expdesc *v1, expdesc *v2);
71 64
72 65
73#endif 66#endif
diff --git a/ldebug.c b/ldebug.c
index f8369d2d..9cb65a1f 100644
--- a/ldebug.c
+++ b/ldebug.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: ldebug.c,v 1.75 2001/03/26 14:31:49 roberto Exp roberto $ 2** $Id: ldebug.c,v 1.76 2001/04/06 18:25:00 roberto Exp roberto $
3** Debug Interface 3** Debug Interface
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -22,6 +22,7 @@
22#include "ltable.h" 22#include "ltable.h"
23#include "ltm.h" 23#include "ltm.h"
24#include "luadebug.h" 24#include "luadebug.h"
25#include "lvm.h"
25 26
26 27
27 28
@@ -298,6 +299,10 @@ LUA_API int lua_getinfo (lua_State *L, const l_char *what, lua_Debug *ar) {
298 299
299#define check(x) if (!(x)) return 0; 300#define check(x) if (!(x)) return 0;
300 301
302#define checkjump(pt,pc) check(0 <= pc && pc < pt->sizecode)
303
304#define checkreg(pt,reg) check((reg) < (pt)->maxstacksize)
305
301 306
302static int checklineinfo (const Proto *pt) { 307static int checklineinfo (const Proto *pt) {
303 int *lineinfo = pt->lineinfo; 308 int *lineinfo = pt->lineinfo;
@@ -318,231 +323,199 @@ static int precheck (const Proto *pt) {
318} 323}
319 324
320 325
321/* value for non-initialized entries in array stacklevel */ 326static int checkopenop (Instruction i) {
322#define SL_EMPTY 255 327 OpCode op = GET_OPCODE(i);
323 328 switch (op) {
324#define checkjump(pt,sl,top,pc) if (!checkjump_aux(pt,sl,top,pc)) return 0; 329 case OP_CALL:
325 330 case OP_RETURN: {
326static int checkjump_aux (const Proto *pt, lu_byte *sl, int top, int pc) { 331 check(GETARG_B(i) == NO_REG);
327 check(0 <= pc && pc < pt->sizecode); 332 return 1;
328 if (sl == NULL) return 1; /* not full checking */ 333 }
329 if (sl[pc] == SL_EMPTY) 334 case OP_SETLISTO: return 1;
330 sl[pc] = (lu_byte)top; 335 default: return 0; /* invalid instruction after an open call */
331 else 336 }
332 check(sl[pc] == top);
333 return 1;
334} 337}
335 338
336 339
337static Instruction luaG_symbexec (lua_State *L, const Proto *pt, 340static Instruction luaG_symbexec (const Proto *pt, int lastpc, int reg) {
338 int lastpc, int stackpos) {
339 int stack[MAXSTACK]; /* stores last instruction that changed a stack entry */
340 lu_byte *sl = NULL;
341 int top;
342 int pc; 341 int pc;
343 if (stackpos < 0) { /* full check? */ 342 int last; /* stores position of last instruction that changed `reg' */
344 int i; 343 last = pt->sizecode-1; /* points to final return (a `neutral' instruction) */
345 sl = luaO_openspace(L, pt->sizecode, lu_byte); 344 if (reg == NO_REG) /* full check? */
346 for (i=0; i<pt->sizecode; i++) /* initialize stack-level array */
347 sl[i] = SL_EMPTY;
348 check(precheck(pt)); 345 check(precheck(pt));
349 } 346 for (pc = 0; pc < lastpc; pc++) {
350 top = pt->numparams; 347 const Instruction i = pt->code[pc];
351 pc = 0;
352 if (pt->is_vararg) /* varargs? */
353 top++; /* `arg' */
354 if (sl) sl[0] = (lu_byte)top;
355 while (pc < lastpc) {
356 const Instruction i = pt->code[pc++];
357 OpCode op = GET_OPCODE(i); 348 OpCode op = GET_OPCODE(i);
358 int arg1 = 0; 349 int a = GETARG_A(i);
359 int arg2 = 0; 350 int b = 0;
360 int push, pop; 351 int c = 0;
361 check(op < NUM_OPCODES); 352#undef check
362 push = (int)luaK_opproperties[op].push; 353#define check(x) if (!(x)) { \
363 pop = (int)luaK_opproperties[op].pop; 354printf(">>>%d %d %d %d %d %d\n", op, a, b, c, pt->maxstacksize, pt->sizek); \
364 switch ((enum Mode)luaK_opproperties[op].mode) { 355return 0; }
365 case iO: break; 356 switch (getOpMode(op)) {
366 case iU: arg1 = GETARG_U(i); check(arg1 >= 0); break; 357 case iABC: {
367 case iS: arg1 = GETARG_S(i); break; 358 b = GETARG_B(i);
368 case iAB: 359 c = GETARG_C(i);
369 arg1 = GETARG_A(i); arg2 = GETARG_B(i); check(arg1 >= 0); break; 360 if (testOpMode(op, OpModeBreg)) {
370 } 361 checkreg(pt, b);
371 switch (op) { 362 check(c < pt->maxstacksize ||
372 case OP_RETURN: { 363 (c >= MAXSTACK && c-MAXSTACK < pt->sizek));
373 check(arg1 <= top); 364 }
374 pop = top-arg1;
375 break; 365 break;
376 } 366 }
377 case OP_CALL: { 367 case iABc: {
378 if (arg2 == MULT_RET) arg2 = 1; 368 b = GETARG_Bc(i);
379 check(arg1 < top); 369 if (testOpMode(op, OpModeK)) check(b < pt->sizek);
380 pop = top-arg1;
381 push = arg2;
382 break; 370 break;
383 } 371 }
384 case OP_PUSHNIL: { 372 case iAsBc: {
385 check(arg1 > 0); 373 b = GETARG_sBc(i);
386 push = arg1;
387 break; 374 break;
388 } 375 }
389 case OP_POP: { 376 }
390 pop = arg1; 377 if (testOpMode(op, OpModeAreg)) checkreg(pt, a);
378 if (testOpMode(op, OpModesetA)) {
379 if (a == reg) last = pc; /* change register `a' */
380 }
381 if (testOpMode(op, OpModeT))
382 check(GET_OPCODE(pt->code[pc+1]) == OP_CJMP);
383 switch (op) {
384 case OP_LOADNIL: {
385 if (a <= reg && reg <= b)
386 last = pc; /* set registers from `a' to `b' */
391 break; 387 break;
392 } 388 }
393 case OP_PUSHSTRING: 389 case OP_LOADUPVAL: {
394 case OP_GETGLOBAL: 390 check(b < pt->nupvalues);
395 case OP_GETDOTTED:
396 case OP_PUSHSELF:
397 case OP_SETGLOBAL: {
398 check(arg1 < pt->sizekstr);
399 break; 391 break;
400 } 392 }
401 case OP_PUSHNUM: 393 case OP_GETGLOBAL:
402 case OP_PUSHNEGNUM: { 394 case OP_SETGLOBAL: {
403 check(arg1 < pt->sizeknum); 395 check(ttype(&pt->k[b]) == LUA_TSTRING);
404 break; 396 break;
405 } 397 }
406 case OP_PUSHUPVALUE: { 398 case OP_SELF: {
407 check(arg1 < pt->nupvalues); 399 checkreg(pt, a+1);
400 if (reg == a+1) last = pc;
408 break; 401 break;
409 } 402 }
410 case OP_GETLOCAL: 403 case OP_CONCAT: {
411 case OP_GETINDEXED: 404 check(b < c); /* at least two operands */
412 case OP_SETLOCAL: {
413 check(arg1 < top);
414 break; 405 break;
415 } 406 }
416 case OP_SETTABLE: { 407 case OP_JMP:
417 check(3 <= arg1 && arg1 <= top); 408 case OP_CJMP: {
418 pop = arg2; 409 int dest = pc+1+b;
410 check(0 <= dest && dest < pt->sizecode);
411 /* not full check and jump is forward and do not skip `lastpc'? */
412 if (reg != NO_REG && pc < dest && dest <= lastpc)
413 pc += b; /* do the jump */
419 break; 414 break;
420 } 415 }
421 case OP_SETLIST: { 416 case OP_TESTT:
422 check(arg2 >= 0); 417 case OP_TESTF: {
423 pop = top-arg2-1; 418 if (a != NO_REG)
419 checkreg(pt, a);
424 break; 420 break;
425 } 421 }
426 case OP_SETMAP: { 422 case OP_NILJMP: {
427 check(arg1 >= 0); 423 check(pc+2 < pt->sizecode); /* check its jump */
428 pop = top-arg1-1;
429 break; 424 break;
430 } 425 }
431 case OP_CONCAT: { 426 case OP_CALL: {
432 pop = arg1; 427 if (b == NO_REG) b = pt->maxstacksize;
428 if (c == NO_REG) {
429 check(checkopenop(pt->code[pc+1]));
430 c = 1;
431 }
432 check(b > a);
433 checkreg(pt, b-1);
434 checkreg(pt, a+c-1);
435 if (reg >= a) last = pc; /* affect all registers above base */
433 break; 436 break;
434 } 437 }
435 case OP_CLOSURE: { 438 case OP_RETURN: {
436 check(arg1 < pt->sizekproto); 439 if (b == NO_REG) b = pt->maxstacksize;
437 check(arg2 == pt->kproto[arg1]->nupvalues); 440 checkreg(pt, b-1);
438 pop = arg2;
439 break; 441 break;
440 } 442 }
441 case OP_JMPNE: 443 case OP_FORPREP:
442 case OP_JMPEQ: 444 case OP_TFORPREP: {
443 case OP_JMPLT: 445 int dest = pc-b; /* jump is negated here */
444 case OP_JMPLE: 446 check(0 <= dest && dest < pt->sizecode &&
445 case OP_JMPGT: 447 GET_OPCODE(pt->code[dest]) == op+1);
446 case OP_JMPGE:
447 case OP_JMPT:
448 case OP_JMPF:
449 case OP_JMP: {
450 checkjump(pt, sl, top-pop, pc+arg1);
451 break; 448 break;
452 } 449 }
453 case OP_FORLOOP: 450 case OP_FORLOOP:
454 case OP_LFORLOOP: 451 case OP_TFORLOOP: {
455 case OP_JMPONT: 452 int dest = pc+b;
456 case OP_JMPONF: { 453 check(0 <= dest && dest < pt->sizecode &&
457 int newpc = pc+arg1; 454 pt->code[dest] == SET_OPCODE(i, op-1));
458 checkjump(pt, sl, top, newpc); 455 checkreg(pt, a + ((op == OP_FORLOOP) ? 2 : 3));
459 /* jump is forward and do not skip `lastpc' and not full check? */
460 if (pc < newpc && newpc <= lastpc && stackpos >= 0) {
461 stack[top-1] = pc-1; /* value comes from `and'/`or' */
462 pc = newpc; /* do the jump */
463 pop = 0; /* do not pop */
464 }
465 break;
466 }
467 case OP_PUSHNILJMP: {
468 check(GET_OPCODE(pt->code[pc]) == OP_PUSHINT); /* only valid sequence */
469 break; 456 break;
470 } 457 }
471 case OP_FORPREP: { 458 case OP_SETLIST: {
472 int endfor = pc-arg1-1; /* jump is `negative' here */ 459 checkreg(pt, a + (b&(LFIELDS_PER_FLUSH-1)) + 1);
473 check(top >= 3);
474 checkjump(pt, sl, top+push, endfor);
475 check(GET_OPCODE(pt->code[endfor]) == OP_FORLOOP);
476 check(GETARG_S(pt->code[endfor]) == arg1);
477 break;
478 }
479 case OP_LFORPREP: {
480 int endfor = pc-arg1-1; /* jump is `negative' here */
481 check(top >= 1);
482 checkjump(pt, sl, top+push, endfor);
483 check(GET_OPCODE(pt->code[endfor]) == OP_LFORLOOP);
484 check(GETARG_S(pt->code[endfor]) == arg1);
485 break; 460 break;
486 } 461 }
487 case OP_PUSHINT: 462 case OP_CLOSURE: {
488 case OP_GETTABLE: 463 check(b < pt->sizekproto);
489 case OP_CREATETABLE: 464 checkreg(pt, a + pt->kproto[b]->nupvalues - 1);
490 case OP_ADD:
491 case OP_ADDI:
492 case OP_SUB:
493 case OP_MULT:
494 case OP_DIV:
495 case OP_POW:
496 case OP_MINUS:
497 case OP_NOT: {
498 break; 465 break;
499 } 466 }
467 default: break;
500 } 468 }
501 top -= pop;
502 check(0 <= top && top+push <= pt->maxstacksize);
503 while (push--) stack[top++] = pc-1;
504 checkjump(pt, sl, top, pc);
505 } 469 }
506 return (stackpos >= 0) ? pt->code[stack[stackpos]] : 1; 470 return pt->code[last];
507} 471}
508 472
509/* }====================================================== */ 473/* }====================================================== */
510 474
511 475
512int luaG_checkcode (lua_State *L, const Proto *pt) { 476int luaG_checkcode (const Proto *pt) {
513 return luaG_symbexec(L, pt, pt->sizecode-1, -1); 477 return luaG_symbexec(pt, pt->sizecode, NO_REG);
514} 478}
515 479
516 480
517static const l_char *getobjname (lua_State *L, StkId obj, const l_char **name) { 481static const l_char *getobjname (lua_State *L, StkId obj, const l_char **name) {
518 CallInfo *ci = ci_stack(L, obj); 482 CallInfo *ci = ci_stack(L, obj);
519 if (!isLmark(ci)) 483 if (isLmark(ci)) { /* an active Lua function? */
520 return NULL; /* not an active Lua function */
521 else {
522 Proto *p = ci_func(ci)->f.l; 484 Proto *p = ci_func(ci)->f.l;
523 int pc = currentpc(ci); 485 int pc = currentpc(ci);
524 int stackpos = obj - ci->base; 486 int stackpos = obj - ci->base;
525 Instruction i = luaG_symbexec(L, p, pc, stackpos); 487 Instruction i;
488 *name = luaF_getlocalname(p, stackpos+1, pc);
489 if (*name) /* is a local? */
490 return l_s("local");
491 i = luaG_symbexec(p, pc, stackpos); /* try symbolic execution */
526 lua_assert(pc != -1); 492 lua_assert(pc != -1);
527 switch (GET_OPCODE(i)) { 493 switch (GET_OPCODE(i)) {
528 case OP_GETGLOBAL: { 494 case OP_GETGLOBAL: {
529 *name = getstr(p->kstr[GETARG_U(i)]); 495 lua_assert(ttype(&p->k[GETARG_Bc(i)]) == LUA_TSTRING);
496 *name = getstr(tsvalue(&p->k[GETARG_Bc(i)]));
530 return l_s("global"); 497 return l_s("global");
531 } 498 }
532 case OP_GETLOCAL: { 499 case OP_MOVE: {
533 *name = luaF_getlocalname(p, GETARG_U(i)+1, pc); 500 int a = GETARG_A(i);
534 lua_assert(*name); 501 int b = GETARG_B(i); /* move from `b' to `a' */
535 return l_s("local"); 502 if (b < a)
503 return getobjname(L, ci->base+b, name); /* get name for `b' */
504 break;
536 } 505 }
537 case OP_PUSHSELF: 506 case OP_GETTABLE:
538 case OP_GETDOTTED: { 507 case OP_SELF: {
539 *name = getstr(p->kstr[GETARG_U(i)]); 508 int c = GETARG_C(i) - MAXSTACK;
540 return l_s("field"); 509 if (c >= 0 && ttype(&p->k[c]) == LUA_TSTRING) {
510 *name = getstr(tsvalue(&p->k[c]));
511 return l_s("field");
512 }
513 break;
541 } 514 }
542 default: 515 default: break;
543 return NULL; /* no useful name found */
544 } 516 }
545 } 517 }
518 return NULL; /* no useful name found */
546} 519}
547 520
548 521
@@ -576,10 +549,18 @@ void luaG_typeerror (lua_State *L, StkId o, const l_char *op) {
576} 549}
577 550
578 551
579void luaG_binerror (lua_State *L, StkId p1, int t, const l_char *op) { 552void luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
580 if (ttype(p1) == t) p1++; 553 if (ttype(p1) == LUA_TSTRING) p1 = p2;
581 lua_assert(ttype(p1) != t); 554 lua_assert(ttype(p1) != LUA_TSTRING);
582 luaG_typeerror(L, p1, op); 555 luaG_typeerror(L, p1, l_s("concat"));
556}
557
558
559void luaG_aritherror (lua_State *L, StkId p1, TObject *p2) {
560 TObject temp;
561 if (luaV_tonumber(p1, &temp) != NULL)
562 p1 = p2; /* first operand is OK; error is in the second */
563 luaG_typeerror(L, p1, l_s("perform arithmetic on"));
583} 564}
584 565
585 566
@@ -592,3 +573,52 @@ void luaG_ordererror (lua_State *L, const TObject *p1, const TObject *p2) {
592 luaO_verror(L, l_s("attempt to compare %.10s with %.10s"), t1, t2); 573 luaO_verror(L, l_s("attempt to compare %.10s with %.10s"), t1, t2);
593} 574}
594 575
576
577
578#define opmode(t,a,b,c,sa,k,m) (((t)<<OpModeT) | \
579 ((a)<<OpModeAreg) | ((b)<<OpModeBreg) | ((c)<<OpModeCreg) | \
580 ((sa)<<OpModesetA) | ((k)<<OpModeK) | (m))
581
582
583const unsigned char luaG_opmodes[] = {
584/* T A B C sA K mode opcode */
585 opmode(0,1,1,0, 1,0,iABC), /* OP_MOVE */
586 opmode(0,1,0,0, 1,1,iABc), /* OP_LOADK */
587 opmode(0,1,0,0, 1,0,iAsBc), /* OP_LOADINT */
588 opmode(0,1,1,0, 1,0,iABC), /* OP_LOADNIL */
589 opmode(0,1,0,0, 1,0,iABc), /* OP_LOADUPVAL */
590 opmode(0,1,0,0, 1,1,iABc), /* OP_GETGLOBAL */
591 opmode(0,1,1,1, 1,0,iABC), /* OP_GETTABLE */
592 opmode(0,1,0,0, 0,1,iABc), /* OP_SETGLOBAL */
593 opmode(0,1,1,1, 0,0,iABC), /* OP_SETTABLE */
594 opmode(0,1,0,0, 1,0,iABc), /* OP_NEWTABLE */
595 opmode(0,1,1,1, 1,0,iABC), /* OP_SELF */
596 opmode(0,1,1,1, 1,0,iABC), /* OP_ADD */
597 opmode(0,1,1,1, 1,0,iABC), /* OP_SUB */
598 opmode(0,1,1,1, 1,0,iABC), /* OP_MUL */
599 opmode(0,1,1,1, 1,0,iABC), /* OP_DIV */
600 opmode(0,1,1,1, 1,0,iABC), /* OP_POW */
601 opmode(0,1,1,0, 1,0,iABC), /* OP_UNM */
602 opmode(0,1,1,0, 1,0,iABC), /* OP_NOT */
603 opmode(0,1,1,1, 1,0,iABC), /* OP_CONCAT */
604 opmode(0,0,0,0, 0,0,iAsBc), /* OP_JMP */
605 opmode(0,0,0,0, 0,0,iAsBc), /* OP_CJMP */
606 opmode(1,0,1,1, 0,0,iABC), /* OP_TESTEQ */
607 opmode(1,0,1,1, 0,0,iABC), /* OP_TESTNE */
608 opmode(1,0,1,1, 0,0,iABC), /* OP_TESTLT */
609 opmode(1,0,1,1, 0,0,iABC), /* OP_TESTLE */
610 opmode(1,0,1,1, 0,0,iABC), /* OP_TESTGT */
611 opmode(1,0,1,1, 0,0,iABC), /* OP_TESTGE */
612 opmode(1,0,1,0, 1,0,iABC), /* OP_TESTT */
613 opmode(1,0,1,0, 1,0,iABC), /* OP_TESTF */
614 opmode(0,1,0,0, 1,0,iAsBc), /* OP_NILJMP */
615 opmode(0,1,0,0, 0,0,iABC), /* OP_CALL */
616 opmode(0,1,0,0, 0,0,iABC), /* OP_RETURN */
617 opmode(0,1,0,0, 0,0,iAsBc), /* OP_FORPREP */
618 opmode(0,1,0,0, 0,0,iAsBc), /* OP_FORLOOP */
619 opmode(0,1,0,0, 0,0,iAsBc), /* OP_TFORPREP */
620 opmode(0,1,0,0, 0,0,iAsBc), /* OP_TFORLOOP */
621 opmode(0,1,0,0, 0,0,iABc), /* OP_SETLIST */
622 opmode(0,1,0,0, 0,0,iABc), /* OP_SETLIST0 */
623 opmode(0,1,0,0, 0,0,iABc) /* OP_CLOSURE */
624};
diff --git a/ldebug.h b/ldebug.h
index 9bdc7c03..7dd7ed23 100644
--- a/ldebug.h
+++ b/ldebug.h
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: ldebug.h,v 1.10 2001/02/12 19:54:50 roberto Exp roberto $ 2** $Id: ldebug.h,v 1.11 2001/02/23 17:17:25 roberto Exp roberto $
3** Auxiliary functions from Debug Interface module 3** Auxiliary functions from Debug Interface module
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -12,11 +12,32 @@
12#include "luadebug.h" 12#include "luadebug.h"
13 13
14 14
15enum OpMode {iABC, iABc, iAsBc}; /* basic instruction format */
16
17/*
18** masks for instruction properties
19*/
20enum OpModeMask {
21 OpModeAreg = 2, /* A is a register */
22 OpModeBreg, /* B is a register */
23 OpModeCreg, /* C is a register/constant */
24 OpModesetA, /* instruction set register A */
25 OpModeK, /* Bc is a constant */
26 OpModeT /* operator is a test */
27};
28
29extern const unsigned char luaG_opmodes[];
30
31#define getOpMode(m) ((enum OpMode)(luaG_opmodes[m] & 3))
32#define testOpMode(m, b) (luaG_opmodes[m] & (1 << (b)))
33
34
15void luaG_typeerror (lua_State *L, StkId o, const l_char *op); 35void luaG_typeerror (lua_State *L, StkId o, const l_char *op);
16void luaG_binerror (lua_State *L, StkId p1, int t, const l_char *op); 36void luaG_concaterror (lua_State *L, StkId p1, StkId p2);
37void luaG_aritherror (lua_State *L, StkId p1, TObject *p2);
17int luaG_getline (int *lineinfo, int pc, int refline, int *refi); 38int luaG_getline (int *lineinfo, int pc, int refline, int *refi);
18void luaG_ordererror (lua_State *L, const TObject *p1, const TObject *p2); 39void luaG_ordererror (lua_State *L, const TObject *p1, const TObject *p2);
19int luaG_checkcode (lua_State *L, const Proto *pt); 40int luaG_checkcode (const Proto *pt);
20 41
21 42
22#endif 43#endif
diff --git a/lfunc.c b/lfunc.c
index 5fe9fa99..9be4e738 100644
--- a/lfunc.c
+++ b/lfunc.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lfunc.c,v 1.42 2001/02/23 17:17:25 roberto Exp roberto $ 2** $Id: lfunc.c,v 1.43 2001/03/26 14:31:49 roberto Exp roberto $
3** Auxiliary functions to manipulate prototypes and closures 3** Auxiliary functions to manipulate prototypes and closures
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -30,10 +30,8 @@ Closure *luaF_newclosure (lua_State *L, int nelems) {
30 30
31Proto *luaF_newproto (lua_State *L) { 31Proto *luaF_newproto (lua_State *L) {
32 Proto *f = luaM_new(L, Proto); 32 Proto *f = luaM_new(L, Proto);
33 f->knum = NULL; 33 f->k = NULL;
34 f->sizeknum = 0; 34 f->sizek = 0;
35 f->kstr = NULL;
36 f->sizekstr = 0;
37 f->kproto = NULL; 35 f->kproto = NULL;
38 f->sizekproto = 0; 36 f->sizekproto = 0;
39 f->code = NULL; 37 f->code = NULL;
@@ -58,8 +56,7 @@ Proto *luaF_newproto (lua_State *L) {
58void luaF_freeproto (lua_State *L, Proto *f) { 56void luaF_freeproto (lua_State *L, Proto *f) {
59 luaM_freearray(L, f->code, f->sizecode, Instruction); 57 luaM_freearray(L, f->code, f->sizecode, Instruction);
60 luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar); 58 luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
61 luaM_freearray(L, f->kstr, f->sizekstr, TString *); 59 luaM_freearray(L, f->k, f->sizek, TObject);
62 luaM_freearray(L, f->knum, f->sizeknum, lua_Number);
63 luaM_freearray(L, f->kproto, f->sizekproto, Proto *); 60 luaM_freearray(L, f->kproto, f->sizekproto, Proto *);
64 luaM_freearray(L, f->lineinfo, f->sizelineinfo, int); 61 luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
65 luaM_freelem(L, f, Proto); 62 luaM_freelem(L, f, Proto);
diff --git a/lgc.c b/lgc.c
index 0237b88c..6eba56d9 100644
--- a/lgc.c
+++ b/lgc.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lgc.c,v 1.96 2001/04/11 14:42:41 roberto Exp roberto $ 2** $Id: lgc.c,v 1.97 2001/04/17 17:35:54 roberto Exp roberto $
3** Garbage Collector 3** Garbage Collector
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -48,8 +48,10 @@ static void protomark (Proto *f) {
48 int i; 48 int i;
49 f->marked = 1; 49 f->marked = 1;
50 strmark(f->source); 50 strmark(f->source);
51 for (i=0; i<f->sizekstr; i++) 51 for (i=0; i<f->sizek; i++) {
52 strmark(f->kstr[i]); 52 if (ttype(f->k+i) == LUA_TSTRING)
53 strmark(tsvalue(f->k+i));
54 }
53 for (i=0; i<f->sizekproto; i++) 55 for (i=0; i<f->sizekproto; i++)
54 protomark(f->kproto[i]); 56 protomark(f->kproto[i]);
55 for (i=0; i<f->sizelocvars; i++) /* mark local-variable names */ 57 for (i=0; i<f->sizelocvars; i++) /* mark local-variable names */
diff --git a/llimits.h b/llimits.h
index 51dbe7af..2b288981 100644
--- a/llimits.h
+++ b/llimits.h
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: llimits.h,v 1.27 2001/02/23 20:28:56 roberto Exp roberto $ 2** $Id: llimits.h,v 1.28 2001/03/26 14:31:49 roberto Exp roberto $
3** Limits, basic types, and some other `installation-dependent' definitions 3** Limits, basic types, and some other `installation-dependent' definitions
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -89,92 +89,23 @@ union L_Umaxalign { double d; void *s; long l; };
89/* 89/*
90** type for virtual-machine instructions 90** type for virtual-machine instructions
91** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h) 91** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
92** For a very small machine, you may change that to 2 bytes (and adjust
93** the following limits accordingly)
94*/ 92*/
95typedef unsigned long Instruction; 93typedef unsigned long Instruction;
96 94
97 95
98/* 96/* maximum stack for a Lua function */
99** size and position of opcode arguments.
100** For an instruction with 2 bytes, size is 16, and size_b can be 5
101** (accordingly, size_u will be 10, and size_a will be 5)
102*/
103#define SIZE_INSTRUCTION 32
104#define SIZE_B 8
105
106#define SIZE_OP 6
107#define SIZE_U (SIZE_INSTRUCTION-SIZE_OP)
108#define POS_U SIZE_OP
109#define POS_B SIZE_OP
110#define SIZE_A (SIZE_INSTRUCTION-(SIZE_OP+SIZE_B))
111#define POS_A (SIZE_OP+SIZE_B)
112
113
114/*
115** limits for opcode arguments.
116** we use (signed) int to manipulate most arguments,
117** so they must fit in BITS_INT-1 bits (-1 for sign)
118*/
119#if SIZE_U < BITS_INT-1
120#define MAXARG_U ((1<<SIZE_U)-1)
121#define MAXARG_S (MAXARG_U>>1) /* `S' is signed */
122#else
123#define MAXARG_U MAX_INT
124#define MAXARG_S MAX_INT
125#endif
126
127#if SIZE_A < BITS_INT-1
128#define MAXARG_A ((1<<SIZE_A)-1)
129#else
130#define MAXARG_A MAX_INT
131#endif
132
133#if SIZE_B < BITS_INT-1
134#define MAXARG_B ((1<<SIZE_B)-1)
135#else
136#define MAXARG_B MAX_INT
137#endif
138
139
140/* maximum stack size in a function */
141#ifndef MAXSTACK
142#define MAXSTACK 250 97#define MAXSTACK 250
143#endif
144
145#if MAXSTACK > MAXARG_B
146#undef MAXSTACK
147#define MAXSTACK MAXARG_B
148#endif
149 98
150 99
151/* maximum number of local variables */ 100/* maximum number of local variables */
152#ifndef MAXLOCALS 101#ifndef MAXLOCALS
153#define MAXLOCALS 200 /* arbitrary limit (<MAXSTACK) */ 102#define MAXLOCALS 200 /* arbitrary limit (<MAXSTACK) */
154#endif 103#endif
155#if MAXLOCALS>=MAXSTACK
156#undef MAXLOCALS
157#define MAXLOCALS (MAXSTACK-1)
158#endif
159 104
160 105
161/* maximum number of upvalues */ 106/* maximum number of upvalues */
162#ifndef MAXUPVALUES 107#ifndef MAXUPVALUES
163#define MAXUPVALUES 32 /* arbitrary limit (<=MAXARG_B) */ 108#define MAXUPVALUES 32 /* arbitrary limit (<MAXSTACK) */
164#endif
165#if MAXUPVALUES>MAXARG_B
166#undef MAXUPVALUES
167#define MAXUPVALUES MAXARG_B
168#endif
169
170
171/* maximum number of variables in the left side of an assignment */
172#ifndef MAXVARSLH
173#define MAXVARSLH 100 /* arbitrary limit (<MULT_RET) */
174#endif
175#if MAXVARSLH>=MULT_RET
176#undef MAXVARSLH
177#define MAXVARSLH (MULT_RET-1)
178#endif 109#endif
179 110
180 111
@@ -182,27 +113,17 @@ typedef unsigned long Instruction;
182#ifndef MAXPARAMS 113#ifndef MAXPARAMS
183#define MAXPARAMS 100 /* arbitrary limit (<MAXLOCALS) */ 114#define MAXPARAMS 100 /* arbitrary limit (<MAXLOCALS) */
184#endif 115#endif
185#if MAXPARAMS>=MAXLOCALS
186#undef MAXPARAMS
187#define MAXPARAMS (MAXLOCALS-1)
188#endif
189 116
190 117
191/* number of list items to accumulate before a SETLIST instruction */ 118/* number of list items to accumulate before a SETLIST instruction */
119/* (must be a power of 2) */
192#define LFIELDS_PER_FLUSH 64 120#define LFIELDS_PER_FLUSH 64
193#if LFIELDS_PER_FLUSH>(MAXSTACK/4)
194#undef LFIELDS_PER_FLUSH
195#define LFIELDS_PER_FLUSH (MAXSTACK/4)
196#endif
197 121
198/* number of record items to accumulate before a SETMAP instruction */
199/* (each item counts 2 elements on the stack: an index and a value) */
200#define RFIELDS_PER_FLUSH (LFIELDS_PER_FLUSH/2)
201 122
202 123
203/* maximum lookback to find a real constant (for code generation) */ 124/* maximum lookback to find a real constant (for code generation) */
204#ifndef LOOKBACKNUMS 125#ifndef LOOKBACKNUMS
205#define LOOKBACKNUMS 20 /* arbitrary constant */ 126#define LOOKBACKNUMS 40 /* arbitrary constant */
206#endif 127#endif
207 128
208 129
diff --git a/lobject.h b/lobject.h
index b6f7afac..97f77a97 100644
--- a/lobject.h
+++ b/lobject.h
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lobject.h,v 1.101 2001/03/07 18:09:25 roberto Exp roberto $ 2** $Id: lobject.h,v 1.102 2001/04/11 14:42:41 roberto Exp roberto $
3** Type definitions for Lua objects 3** Type definitions for Lua objects
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -114,10 +114,8 @@ union L_UTString {
114** Function Prototypes 114** Function Prototypes
115*/ 115*/
116typedef struct Proto { 116typedef struct Proto {
117 lua_Number *knum; /* numbers used by the function */ 117 TObject *k; /* constants used by the function */
118 int sizeknum; /* size of `knum' */ 118 int sizek; /* size of `k' */
119 struct TString **kstr; /* strings used by the function */
120 int sizekstr; /* size of `kstr' */
121 struct Proto **kproto; /* functions defined inside the function */ 119 struct Proto **kproto; /* functions defined inside the function */
122 int sizekproto; /* size of `kproto' */ 120 int sizekproto; /* size of `kproto' */
123 Instruction *code; 121 Instruction *code;
diff --git a/lopcodes.h b/lopcodes.h
index 3b743880..5819c407 100644
--- a/lopcodes.h
+++ b/lopcodes.h
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lopcodes.h,v 1.71 2001/03/07 13:22:55 roberto Exp roberto $ 2** $Id: lopcodes.h,v 1.72 2001/04/06 18:25:00 roberto Exp roberto $
3** Opcodes for Lua virtual machine 3** Opcodes for Lua virtual machine
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -12,29 +12,55 @@
12 12
13/*=========================================================================== 13/*===========================================================================
14 We assume that instructions are unsigned numbers. 14 We assume that instructions are unsigned numbers.
15 All instructions have an opcode in the first 6 bits. Moreover, 15 All instructions have an opcode in the first 6 bits.
16 an instruction can have 0, 1, or 2 arguments. Instructions can 16 Instructions can have the following fields:
17 have the following types: 17 `A' : 8 bits (25-32)
18 type 0: no arguments 18 `B' : 8 bits (17-24)
19 type 1: 1 unsigned argument in the higher bits (called `U') 19 `C' : 10 bits (7-16)
20 type 2: 1 signed argument in the higher bits (`S') 20 `Bc' : 18 bits (`B' and `C' together)
21 type 3: 1st unsigned argument in the higher bits (`A') 21 `sBc' : signed Bc
22 2nd unsigned argument in the middle bits (`B')
23 22
24 A signed argument is represented in excess K; that is, the number 23 A signed argument is represented in excess K; that is, the number
25 value is the unsigned value minus K. K is exactly the maximum value 24 value is the unsigned value minus K. K is exactly the maximum value
26 for that argument (so that -max is represented by 0, and +max is 25 for that argument (so that -max is represented by 0, and +max is
27 represented by 2*max), which is half the maximum for the corresponding 26 represented by 2*max), which is half the maximum for the corresponding
28 unsigned argument. 27 unsigned argument.
29
30 The size of each argument is defined in `llimits.h'. The usual is an
31 instruction with 32 bits, U arguments with 26 bits (32-6), B arguments
32 with 9 bits, and A arguments with 17 bits (32-6-9). For small
33 installations, the instruction size can be 16, so U has 10 bits,
34 and A and B have 5 bits each.
35===========================================================================*/ 28===========================================================================*/
36 29
37 30
31/*
32** size and position of opcode arguments.
33*/
34#define SIZE_C 10
35#define SIZE_B 8
36#define SIZE_Bc (SIZE_C + SIZE_B)
37#define SIZE_A 8
38
39#define SIZE_OP 6
40
41#define POS_C SIZE_OP
42#define POS_B (POS_C + SIZE_C)
43#define POS_Bc POS_C
44#define POS_A (POS_B + SIZE_B)
45
46
47/*
48** limits for opcode arguments.
49** we use (signed) int to manipulate most arguments,
50** so they must fit in BITS_INT-1 bits (-1 for sign)
51*/
52#if SIZE_Bc < BITS_INT-1
53#define MAXARG_Bc ((1<<SIZE_Bc)-1)
54#define MAXARG_sBc (MAXARG_Bc>>1) /* `sBc' is signed */
55#else
56#define MAXARG_Bc MAX_INT
57#define MAXARG_sBc MAX_INT
58#endif
59
60
61#define MAXARG_A ((1<<SIZE_A)-1)
62#define MAXARG_B ((1<<SIZE_B)-1)
63#define MAXARG_C ((1<<SIZE_C)-1)
38 64
39 65
40/* creates a mask with `n' 1 bits at position `p' */ 66/* creates a mask with `n' 1 bits at position `p' */
@@ -47,120 +73,129 @@
47** the following macros help to manipulate instructions 73** the following macros help to manipulate instructions
48*/ 74*/
49 75
50#define CREATE_0(o) ((Instruction)(o))
51#define GET_OPCODE(i) ((OpCode)((i)&MASK1(SIZE_OP,0))) 76#define GET_OPCODE(i) ((OpCode)((i)&MASK1(SIZE_OP,0)))
52#define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,0)) | (Instruction)(o))) 77#define SET_OPCODE(i,o) (((i)&MASK0(SIZE_OP,0)) | (Instruction)(o))
53
54#define CREATE_U(o,u) ((Instruction)(o) | ((Instruction)(u)<<POS_U))
55#define GETARG_U(i) ((int)((i)>>POS_U))
56#define SETARG_U(i,u) ((i) = (((i)&MASK0(SIZE_U,POS_U)) | \
57 ((Instruction)(u)<<POS_U)))
58 78
59#define CREATE_S(o,s) CREATE_U((o),(s)+MAXARG_S)
60#define GETARG_S(i) (GETARG_U(i)-MAXARG_S)
61#define SETARG_S(i,s) SETARG_U((i),(s)+MAXARG_S)
62
63
64#define CREATE_AB(o,a,b) ((Instruction)(o) | ((Instruction)(a)<<POS_A) \
65 | ((Instruction)(b)<<POS_B))
66#define GETARG_A(i) ((int)((i)>>POS_A)) 79#define GETARG_A(i) ((int)((i)>>POS_A))
67#define SETARG_A(i,a) ((i) = (((i)&MASK0(SIZE_A,POS_A)) | \ 80#define SETARG_A(i,u) ((i) = (((i)&MASK0(SIZE_A,POS_A)) | \
68 ((Instruction)(a)<<POS_A))) 81 ((Instruction)(u)<<POS_A)))
82
69#define GETARG_B(i) ((int)(((i)>>POS_B) & MASK1(SIZE_B,0))) 83#define GETARG_B(i) ((int)(((i)>>POS_B) & MASK1(SIZE_B,0)))
70#define SETARG_B(i,b) ((i) = (((i)&MASK0(SIZE_B,POS_B)) | \ 84#define SETARG_B(i,b) ((i) = (((i)&MASK0(SIZE_B,POS_B)) | \
71 ((Instruction)(b)<<POS_B))) 85 ((Instruction)(b)<<POS_B)))
72 86
87#define GETARG_C(i) ((int)(((i)>>POS_C) & MASK1(SIZE_C,0)))
88#define SETARG_C(i,b) ((i) = (((i)&MASK0(SIZE_C,POS_C)) | \
89 ((Instruction)(b)<<POS_C)))
90
91#define GETARG_Bc(i) ((int)(((i)>>POS_Bc) & MASK1(SIZE_Bc,0)))
92#define SETARG_Bc(i,b) ((i) = (((i)&MASK0(SIZE_Bc,POS_Bc)) | \
93 ((Instruction)(b)<<POS_Bc)))
94
95#define GETARG_sBc(i) (GETARG_Bc(i)-MAXARG_sBc)
96#define SETARG_sBc(i,b) SETARG_Bc((i),(b)+MAXARG_sBc)
97
98
99#define CREATE_ABC(o,a,b,c) ((Instruction)(o) \
100 | ((Instruction)(a)<<POS_A) \
101 | ((Instruction)(b)<<POS_B) \
102 | ((Instruction)(c)<<POS_C))
103
104#define CREATE_ABc(o,a,bc) ((Instruction)(o) \
105 | ((Instruction)(a)<<POS_A) \
106 | ((Instruction)(bc)<<POS_Bc))
107
108
109
73 110
74/* 111/*
75** K = U argument used as index to `kstr' 112** an invalid register that fits in 8 bits
76** J = S argument used as jump offset (relative to pc of next instruction) 113*/
77** L = unsigned argument used as index of local variable 114#define NO_REG MAXARG_A
78** N = U argument used as index to `knum' 115
116
117/*
118** R(x) - register
119** Kst(x) - constant (in constant table)
120** R/K(x) == if x < MAXSTACK then R(x) else Kst(x-MAXSTACK)
79*/ 121*/
80 122
81typedef enum { 123typedef enum {
82/*---------------------------------------------------------------------- 124/*----------------------------------------------------------------------
83name args stack before stack after side effects 125name args description
84------------------------------------------------------------------------*/ 126------------------------------------------------------------------------*/
85OP_RETURN,/* U v_n-v_x(at u) (return) returns v_x-v_n */ 127OP_MOVE,/* A B R(A) := R(B) */
86 128OP_LOADK,/* A Bc R(A) := Kst(Bc) */
87OP_CALL,/* A B v_n-v_1 f(at a) r_b-r_1 f(v1,...,v_n) */ 129OP_LOADINT,/* A sBc R(A) := (Number)sBc */
88 130OP_LOADNIL,/* A B R(A) := ... := R(B) := nil */
89OP_PUSHNIL,/* U - nil_1-nil_u */ 131OP_LOADUPVAL,/* A Bc R(A) := UpValue[Bc] */
90OP_POP,/* U a_u-a_1 - */
91 132
92OP_PUSHINT,/* S - (lua_Number)s */ 133OP_GETGLOBAL,/* A Bc R(A) := Gbl[Kst(Bc)] */
93OP_PUSHSTRING,/* K - KSTR[k] */ 134OP_GETTABLE,/* A B C R(A) := R(B)[R/K(C)] */
94OP_PUSHNUM,/* N - KNUM[n] */
95OP_PUSHNEGNUM,/* N - -KNUM[n] */
96 135
97OP_PUSHUPVALUE,/* U - Closure[u] */ 136OP_SETGLOBAL,/* A Bc Gbl[Kst(Bc)] := R(A) */
137OP_SETTABLE,/* A B C R(B)[R/K(C)] := R(A) */
98 138
99OP_GETLOCAL,/* L - LOC[l] */ 139OP_NEWTABLE,/* A Bc R(A) := {} (size = Bc) */
100OP_GETGLOBAL,/* K - VAR[KSTR[k]] */
101 140
102OP_GETTABLE,/* - i t t[i] */ 141OP_SELF,/* A B C R(A+1) := R(B); R(A) := R(B)[R/K(C)] */
103OP_GETDOTTED,/* K t t[KSTR[k]] */
104OP_GETINDEXED,/* L t t[LOC[l]] */
105OP_PUSHSELF,/* K t t t[KSTR[k]] */
106 142
107OP_CREATETABLE,/* U - newarray(size = u) */ 143OP_ADD,/* A B C R(A) := R(B) + R/K(C) */
144OP_SUB,/* A B C R(A) := R(B) - R/K(C) */
145OP_MUL,/* A B C R(A) := R(B) * R/K(C) */
146OP_DIV,/* A B C R(A) := R(B) / R/K(C) */
147OP_POW,/* A B C R(A) := R(B) ^ R/K(C) */
148OP_UNM,/* A B R(A) := -R(B) */
149OP_NOT,/* A B R(A) := not R(B) */
108 150
109OP_SETLOCAL,/* L x - LOC[l]=x */ 151OP_CONCAT,/* A B C R(A) := R(B).. ... ..R(C) */
110OP_SETGLOBAL,/* K x - VAR[KSTR[k]]=x */
111OP_SETTABLE,/* A B v a_a-a_1 i t (pops b values) t[i]=v */
112 152
113OP_SETLIST,/* A B v_n-v_1 v_b v_b v_b[i+a*FPF]=v_i */ 153OP_JMP,/* sBc PC += sBc */
114OP_SETMAP,/* U v_n k_n - v_1 k_1 v_u v_u v_u[k_i]=v_i */ 154OP_CJMP,/* sBc if test then PC += sBc (see (1)) */
115 155
116OP_ADD,/* - y x x+y */ 156OP_TESTEQ,/* B C test := (R(B) == R/K(C)) */
117OP_ADDI,/* S x x+s */ 157OP_TESTNE,/* B C test := (R(B) ~= R/K(C)) */
118OP_SUB,/* - y x x-y */ 158OP_TESTLT,/* B C test := (R(B) < R/K(C)) */
119OP_MULT,/* - y x x*y */ 159OP_TESTLE,/* B C test := (R(B) <= R/K(C)) */
120OP_DIV,/* - y x x/y */ 160OP_TESTGT,/* B C test := (R(B) > R/K(C)) */
121OP_POW,/* - y x x^y */ 161OP_TESTGE,/* B C test := (R(B) >= R/K(C)) */
122OP_CONCAT,/* U v_u-v_1 v1..-..v_u */
123OP_MINUS,/* - x -x */
124OP_NOT,/* - x (x==nil)? 1 : nil */
125 162
126OP_JMPNE,/* J y x - (x~=y)? PC+=s */ 163OP_TESTT,/* A B test := R(B); if (test) R(A) := R(B) */
127OP_JMPEQ,/* J y x - (x==y)? PC+=s */ 164OP_TESTF,/* A B test := not R(B); if (test) R(A) := nil */
128OP_JMPLT,/* J y x - (x<y)? PC+=s */
129OP_JMPLE,/* J y x - (x<y)? PC+=s */
130OP_JMPGT,/* J y x - (x>y)? PC+=s */
131OP_JMPGE,/* J y x - (x>=y)? PC+=s */
132 165
133OP_JMPT,/* J x - (x~=nil)? PC+=s */ 166OP_NILJMP,/* A R(A) := nil; PC++; */
134OP_JMPF,/* J x - (x==nil)? PC+=s */
135OP_JMPONT,/* J x (x~=nil)? x : - (x~=nil)? PC+=s */
136OP_JMPONF,/* J x (x==nil)? x : - (x==nil)? PC+=s */
137OP_JMP,/* J - - PC+=s */
138 167
139OP_PUSHNILJMP,/* - - nil PC++; */ 168OP_CALL,/* A B C R(A), ... ,R(A+C-1) := R(A)(R(A+1), ... ,R(B-1))*/
169OP_RETURN,/* A B return R(A), ... ,R(B-1) (see (3)) */
140 170
141OP_FORPREP,/* J */ 171OP_FORPREP,/* A sBc */
142OP_FORLOOP,/* J */ 172OP_FORLOOP,/* A sBc */
143 173
144OP_LFORPREP,/* J */ 174OP_TFORPREP,/* A sBc */
145OP_LFORLOOP,/* J */ 175OP_TFORLOOP,/* A sBc */
146 176
147OP_CLOSURE/* A B v_b-v_1 closure(KPROTO[a], v_1-v_b) */ 177OP_SETLIST,/* A Bc R(A)[Bc-Bc%FPF+i] := R(A+i), 1 <= i <= Bc%FPF+1 */
178OP_SETLISTO,/* A Bc */
148 179
180OP_CLOSURE /* A Bc R(A) := closure(KPROTO[Bc], R(A), ... ,R(A+n)) */
149} OpCode; 181} OpCode;
150 182
183
151#define NUM_OPCODES ((int)OP_CLOSURE+1) 184#define NUM_OPCODES ((int)OP_CLOSURE+1)
152 185
153 186
154#define ISJUMP(o) (OP_JMPNE <= (o) && (o) <= OP_JMP)
155 187
188/*===========================================================================
189 Notes:
190 (1) In the current implementation there is no `test' variable;
191 instructions OP_TEST* and OP_CJMP must always occur together.
156 192
193 (2) In OP_CALL, if (B == NO_REG) then B = top. C is the number of returns,
194 and can be NO_REG. OP_CALL always set "top" to last_result+1, so
195 next open instruction (OP_CALL, OP_RETURN, OP_SETLIST) may use "top".
157 196
158/* special code to fit a LUA_MULTRET inside an argB */ 197 (3) In OP_RETURN, if (B == NO_REG) then B = top.
159#define MULT_RET 255 /* (<=MAXARG_B) */ 198===========================================================================*/
160#if MULT_RET>MAXARG_B
161#undef MULT_RET
162#define MULT_RET MAXARG_B
163#endif
164 199
165 200
166#endif 201#endif
diff --git a/lparser.c b/lparser.c
index a5a56829..2236d79d 100644
--- a/lparser.c
+++ b/lparser.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lparser.c,v 1.141 2001/04/05 16:49:14 roberto Exp roberto $ 2** $Id: lparser.c,v 1.142 2001/04/06 18:25:00 roberto Exp roberto $
3** LL(1) Parser and code generator for Lua 3** LL(1) Parser and code generator for Lua
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -35,10 +35,12 @@ typedef struct Constdesc {
35} Constdesc; 35} Constdesc;
36 36
37 37
38/*
39** nodes for break list (list of active breakable loops)
40*/
38typedef struct Breaklabel { 41typedef struct Breaklabel {
39 struct Breaklabel *previous; /* chain */ 42 struct Breaklabel *previous; /* chain */
40 int breaklist; 43 int breaklist; /* list of jumps out of this loop */
41 int stacklevel;
42} Breaklabel; 44} Breaklabel;
43 45
44 46
@@ -47,11 +49,10 @@ typedef struct Breaklabel {
47/* 49/*
48** prototypes for recursive non-terminal functions 50** prototypes for recursive non-terminal functions
49*/ 51*/
50static void body (LexState *ls, int needself, int line); 52static void body (LexState *ls, expdesc *v, int needself, int line);
51static void chunk (LexState *ls); 53static void chunk (LexState *ls);
52static void constructor (LexState *ls); 54static void constructor (LexState *ls, expdesc *v);
53static void expr (LexState *ls, expdesc *v); 55static void expr (LexState *ls, expdesc *v);
54static void exp1 (LexState *ls);
55 56
56 57
57 58
@@ -119,25 +120,6 @@ static void check_match (LexState *ls, int what, int who, int where) {
119} 120}
120 121
121 122
122static int string_constant (FuncState *fs, TString *s) {
123 Proto *f = fs->f;
124 int c = s->u.s.constindex;
125 if (c >= fs->nkstr || f->kstr[c] != s) {
126 luaM_growvector(fs->L, f->kstr, fs->nkstr, f->sizekstr, TString *,
127 MAXARG_U, l_s("constant table overflow"));
128 c = fs->nkstr++;
129 f->kstr[c] = s;
130 s->u.s.constindex = c; /* hint for next time */
131 }
132 return c;
133}
134
135
136static void code_string (LexState *ls, TString *s) {
137 luaK_kstr(ls, string_constant(ls->fs, s));
138}
139
140
141static TString *str_checkname (LexState *ls) { 123static TString *str_checkname (LexState *ls) {
142 TString *ts; 124 TString *ts;
143 check_condition(ls, (ls->t.token == TK_NAME), l_s("<name> expected")); 125 check_condition(ls, (ls->t.token == TK_NAME), l_s("<name> expected"));
@@ -147,11 +129,21 @@ static TString *str_checkname (LexState *ls) {
147} 129}
148 130
149 131
150static int checkname (LexState *ls) { 132static void init_exp (expdesc *e, expkind k, int i) {
151 return string_constant(ls->fs, str_checkname(ls)); 133 e->f = e->t = NO_JUMP;
134 e->k = k;
135 e->u.i.info = i;
136}
137
138
139static void codestring (LexState *ls, expdesc *e, TString *s) {
140 init_exp(e, VK, luaK_stringk(ls->fs, s));
152} 141}
153 142
154 143
144#define checkname(ls,e) codestring(ls,e,str_checkname(ls))
145
146
155static int luaI_registerlocalvar (LexState *ls, TString *varname) { 147static int luaI_registerlocalvar (LexState *ls, TString *varname) {
156 FuncState *fs = ls->fs; 148 FuncState *fs = ls->fs;
157 Proto *f = fs->f; 149 Proto *f = fs->f;
@@ -195,14 +187,13 @@ static int search_local (LexState *ls, TString *n, expdesc *var) {
195 int i; 187 int i;
196 for (i=fs->nactloc-1; i >= 0; i--) { 188 for (i=fs->nactloc-1; i >= 0; i--) {
197 if (n == fs->f->locvars[fs->actloc[i]].varname) { 189 if (n == fs->f->locvars[fs->actloc[i]].varname) {
198 var->k = VLOCAL; 190 init_exp(var, VLOCAL, i);
199 var->u.index = i;
200 return level; 191 return level;
201 } 192 }
202 } 193 }
203 level++; /* `var' not found; check outer level */ 194 level++; /* `var' not found; check outer level */
204 } 195 }
205 var->k = VGLOBAL; /* not found in any level; must be global */ 196 init_exp(var, VGLOBAL, 0); /* not found in any level; must be global */
206 return -1; 197 return -1;
207} 198}
208 199
@@ -213,7 +204,7 @@ static void singlevar (LexState *ls, TString *n, expdesc *var) {
213 luaX_syntaxerror(ls, l_s("cannot access a variable in outer function"), 204 luaX_syntaxerror(ls, l_s("cannot access a variable in outer function"),
214 getstr(n)); 205 getstr(n));
215 else if (level == -1) /* global? */ 206 else if (level == -1) /* global? */
216 var->u.index = string_constant(ls->fs, n); 207 var->u.i.info = luaK_stringk(ls->fs, n);
217} 208}
218 209
219 210
@@ -221,7 +212,7 @@ static int indexupvalue (LexState *ls, expdesc *v) {
221 FuncState *fs = ls->fs; 212 FuncState *fs = ls->fs;
222 int i; 213 int i;
223 for (i=0; i<fs->f->nupvalues; i++) { 214 for (i=0; i<fs->f->nupvalues; i++) {
224 if (fs->upvalues[i].k == v->k && fs->upvalues[i].u.index == v->u.index) 215 if (fs->upvalues[i].k == v->k && fs->upvalues[i].u.i.info == v->u.i.info)
225 return i; 216 return i;
226 } 217 }
227 /* new one */ 218 /* new one */
@@ -231,37 +222,43 @@ static int indexupvalue (LexState *ls, expdesc *v) {
231} 222}
232 223
233 224
234static void pushupvalue (LexState *ls, TString *n) { 225static void codeupvalue (LexState *ls, expdesc *v, TString *n) {
235 FuncState *fs = ls->fs; 226 FuncState *fs = ls->fs;
236 expdesc v; 227 int level;
237 int level = search_local(ls, n, &v); 228 level = search_local(ls, n, v);
238 if (level == -1) { /* global? */ 229 if (level == -1) { /* global? */
239 if (fs->prev == NULL) 230 if (fs->prev == NULL)
240 luaX_syntaxerror(ls, l_s("cannot access an upvalue at top level"), getstr(n)); 231 luaX_syntaxerror(ls, l_s("cannot access an upvalue at top level"),
241 v.u.index = string_constant(fs->prev, n); 232 getstr(n));
233 v->u.i.info = luaK_stringk(fs->prev, n);
242 } 234 }
243 else if (level != 1) { 235 else if (level != 1) {
244 luaX_syntaxerror(ls, 236 luaX_syntaxerror(ls,
245 l_s("upvalue must be global or local to immediately outer function"), getstr(n)); 237 l_s("upvalue must be global or local to immediately outer function"),
238 getstr(n));
246 } 239 }
247 luaK_code1(fs, OP_PUSHUPVALUE, indexupvalue(ls, &v)); 240 init_exp(v, VRELOCABLE,
241 luaK_codeABc(fs, OP_LOADUPVAL, 0, indexupvalue(ls, v)));
248} 242}
249 243
250 244
251static void adjust_mult_assign (LexState *ls, int nvars, int nexps) { 245static void adjust_assign (LexState *ls, int nvars, int nexps, expdesc *e) {
252 FuncState *fs = ls->fs; 246 FuncState *fs = ls->fs;
253 int diff = nexps - nvars; 247 int extra = nvars - nexps;
254 if (nexps > 0 && luaK_lastisopen(fs)) { /* list ends in a function call */ 248 if (e->k == VCALL) {
255 diff--; /* do not count function call itself */ 249 extra++; /* includes call itself */
256 if (diff <= 0) { /* more variables than values? */ 250 if (extra <= 0) extra = 0;
257 luaK_setcallreturns(fs, -diff); /* function call provide extra values */ 251 else luaK_reserveregs(fs, extra-1);
258 diff = 0; /* no more difference */ 252 luaK_setcallreturns(fs, e, extra); /* call provides the difference */
253 }
254 else {
255 if (e->k != VVOID) luaK_exp2nextreg(fs, e); /* close last expression */
256 if (extra > 0) {
257 int reg = fs->freereg;
258 luaK_reserveregs(fs, extra);
259 luaK_nil(fs, reg, extra);
259 } 260 }
260 else /* more values than variables */
261 luaK_setcallreturns(fs, 0); /* call should provide no value */
262 } 261 }
263 /* push or pop eventual difference between list lengths */
264 luaK_adjuststack(fs, diff);
265} 262}
266 263
267 264
@@ -275,12 +272,11 @@ static void code_params (LexState *ls, int nparams, short dots) {
275 new_localvarstr(ls, l_s("arg"), 0); 272 new_localvarstr(ls, l_s("arg"), 0);
276 adjustlocalvars(ls, 1); 273 adjustlocalvars(ls, 1);
277 } 274 }
278 luaK_deltastack(fs, fs->nactloc); /* count parameters in the stack */ 275 luaK_reserveregs(fs, fs->nactloc); /* reserve register for parameters */
279} 276}
280 277
281 278
282static void enterbreak (FuncState *fs, Breaklabel *bl) { 279static void enterbreak (FuncState *fs, Breaklabel *bl) {
283 bl->stacklevel = fs->stacklevel;
284 bl->breaklist = NO_JUMP; 280 bl->breaklist = NO_JUMP;
285 bl->previous = fs->bl; 281 bl->previous = fs->bl;
286 fs->bl = bl; 282 fs->bl = bl;
@@ -289,21 +285,24 @@ static void enterbreak (FuncState *fs, Breaklabel *bl) {
289 285
290static void leavebreak (FuncState *fs, Breaklabel *bl) { 286static void leavebreak (FuncState *fs, Breaklabel *bl) {
291 fs->bl = bl->previous; 287 fs->bl = bl->previous;
292 lua_assert(bl->stacklevel == fs->stacklevel);
293 luaK_patchlist(fs, bl->breaklist, luaK_getlabel(fs)); 288 luaK_patchlist(fs, bl->breaklist, luaK_getlabel(fs));
294} 289}
295 290
296 291
297static void pushclosure (LexState *ls, FuncState *func) { 292static void pushclosure (LexState *ls, FuncState *func, expdesc *v) {
298 FuncState *fs = ls->fs; 293 FuncState *fs = ls->fs;
299 Proto *f = fs->f; 294 Proto *f = fs->f;
300 int i; 295 int i;
296 int reg = fs->freereg;
301 for (i=0; i<func->f->nupvalues; i++) 297 for (i=0; i<func->f->nupvalues; i++)
302 luaK_tostack(ls, &func->upvalues[i], 1); 298 luaK_exp2nextreg(fs, &func->upvalues[i]);
303 luaM_growvector(ls->L, f->kproto, fs->nkproto, f->sizekproto, Proto *, 299 luaM_growvector(ls->L, f->kproto, fs->nkproto, f->sizekproto, Proto *,
304 MAXARG_A, l_s("constant table overflow")); 300 MAXARG_Bc, l_s("constant table overflow"));
305 f->kproto[fs->nkproto++] = func->f; 301 f->kproto[fs->nkproto++] = func->f;
306 luaK_code2(fs, OP_CLOSURE, fs->nkproto-1, func->f->nupvalues); 302 fs->freereg = reg; /* CLOSURE will consume those values */
303 init_exp(v, VNONRELOC, reg);
304 luaK_reserveregs(fs, 1);
305 luaK_codeABc(fs, OP_CLOSURE, v->u.i.info, fs->nkproto-1);
307} 306}
308 307
309 308
@@ -317,10 +316,9 @@ static void open_func (LexState *ls, FuncState *fs) {
317 fs->pc = 0; 316 fs->pc = 0;
318 fs->lasttarget = 0; 317 fs->lasttarget = 0;
319 fs->jlt = NO_JUMP; 318 fs->jlt = NO_JUMP;
320 fs->stacklevel = 0; 319 fs->freereg = 0;
321 fs->nkstr = 0; 320 fs->nk = 0;
322 fs->nkproto = 0; 321 fs->nkproto = 0;
323 fs->nknum = 0;
324 fs->nlineinfo = 0; 322 fs->nlineinfo = 0;
325 fs->nlocvars = 0; 323 fs->nlocvars = 0;
326 fs->nactloc = 0; 324 fs->nactloc = 0;
@@ -328,7 +326,7 @@ static void open_func (LexState *ls, FuncState *fs) {
328 fs->bl = NULL; 326 fs->bl = NULL;
329 f->code = NULL; 327 f->code = NULL;
330 f->source = ls->source; 328 f->source = ls->source;
331 f->maxstacksize = 0; 329 f->maxstacksize = 1; /* register 0 is always valid */
332 f->numparams = 0; /* default for main chunk */ 330 f->numparams = 0; /* default for main chunk */
333 f->is_vararg = 0; /* default for main chunk */ 331 f->is_vararg = 0; /* default for main chunk */
334} 332}
@@ -338,15 +336,13 @@ static void close_func (LexState *ls) {
338 lua_State *L = ls->L; 336 lua_State *L = ls->L;
339 FuncState *fs = ls->fs; 337 FuncState *fs = ls->fs;
340 Proto *f = fs->f; 338 Proto *f = fs->f;
341 luaK_code1(fs, OP_RETURN, ls->fs->nactloc); /* final return */ 339 luaK_codeABC(fs, OP_RETURN, 0, 0, 0); /* final return */
342 luaK_getlabel(fs); /* close eventual list of pending jumps */ 340 luaK_getlabel(fs); /* close eventual list of pending jumps */
343 removelocalvars(ls, fs->nactloc); 341 removelocalvars(ls, fs->nactloc);
344 luaM_reallocvector(L, f->code, f->sizecode, fs->pc, Instruction); 342 luaM_reallocvector(L, f->code, f->sizecode, fs->pc, Instruction);
345 f->sizecode = fs->pc; 343 f->sizecode = fs->pc;
346 luaM_reallocvector(L, f->kstr, f->sizekstr, fs->nkstr, TString *); 344 luaM_reallocvector(L, f->k, f->sizek, fs->nk, TObject);
347 f->sizekstr = fs->nkstr; 345 f->sizek = fs->nk;
348 luaM_reallocvector(L, f->knum, f->sizeknum, fs->nknum, lua_Number);
349 f->sizeknum = fs->nknum;
350 luaM_reallocvector(L, f->kproto, f->sizekproto, fs->nkproto, Proto *); 346 luaM_reallocvector(L, f->kproto, f->sizekproto, fs->nkproto, Proto *);
351 f->sizekproto = fs->nkproto; 347 f->sizekproto = fs->nkproto;
352 luaM_reallocvector(L, f->locvars, f->sizelocvars, fs->nlocvars, LocVar); 348 luaM_reallocvector(L, f->locvars, f->sizelocvars, fs->nlocvars, LocVar);
@@ -354,9 +350,9 @@ static void close_func (LexState *ls) {
354 luaM_reallocvector(L, f->lineinfo, f->sizelineinfo, fs->nlineinfo+1, int); 350 luaM_reallocvector(L, f->lineinfo, f->sizelineinfo, fs->nlineinfo+1, int);
355 f->lineinfo[fs->nlineinfo++] = MAX_INT; /* end flag */ 351 f->lineinfo[fs->nlineinfo++] = MAX_INT; /* end flag */
356 f->sizelineinfo = fs->nlineinfo; 352 f->sizelineinfo = fs->nlineinfo;
357 lua_assert(luaG_checkcode(L, f)); 353 lua_assert(luaG_checkcode(f));
358 ls->fs = fs->prev;
359 lua_assert(fs->bl == NULL); 354 lua_assert(fs->bl == NULL);
355 ls->fs = fs->prev;
360} 356}
361 357
362 358
@@ -367,7 +363,8 @@ Proto *luaY_parser (lua_State *L, ZIO *z) {
367 open_func(&lexstate, &funcstate); 363 open_func(&lexstate, &funcstate);
368 next(&lexstate); /* read first token */ 364 next(&lexstate); /* read first token */
369 chunk(&lexstate); 365 chunk(&lexstate);
370 check_condition(&lexstate, (lexstate.t.token == TK_EOS), l_s("<eof> expected")); 366 check_condition(&lexstate, (lexstate.t.token == TK_EOS),
367 l_s("<eof> expected"));
371 close_func(&lexstate); 368 close_func(&lexstate);
372 lua_assert(funcstate.prev == NULL); 369 lua_assert(funcstate.prev == NULL);
373 lua_assert(funcstate.f->nupvalues == 0); 370 lua_assert(funcstate.f->nupvalues == 0);
@@ -381,48 +378,64 @@ Proto *luaY_parser (lua_State *L, ZIO *z) {
381/*============================================================*/ 378/*============================================================*/
382 379
383 380
384static int explist1 (LexState *ls) { 381static void luaY_field (LexState *ls, expdesc *v) {
382 /* field -> ['.' | ':'] NAME */
383 FuncState *fs = ls->fs;
384 expdesc key;
385 luaK_exp2anyreg(fs, v);
386 next(ls); /* skip the dot or colon */
387 checkname(ls, &key);
388 luaK_indexed(fs, v, &key);
389}
390
391
392static void luaY_index (LexState *ls, expdesc *v) {
393 /* index -> '[' expr ']' */
394 next(ls); /* skip the '[' */
395 expr(ls, v);
396 luaK_exp2val(ls->fs, v);
397 check(ls, l_c(']'));
398}
399
400
401static int explist1 (LexState *ls, expdesc *v) {
385 /* explist1 -> expr { `,' expr } */ 402 /* explist1 -> expr { `,' expr } */
386 int n = 1; /* at least one expression */ 403 int n = 1; /* at least one expression */
387 expdesc v; 404 expr(ls, v);
388 expr(ls, &v);
389 while (ls->t.token == l_c(',')) { 405 while (ls->t.token == l_c(',')) {
390 next(ls); /* skip comma */ 406 next(ls); /* skip comma */
391 luaK_tostack(ls, &v, 1); /* gets only 1 value from previous expression */ 407 luaK_exp2nextreg(ls->fs, v);
392 expr(ls, &v); 408 expr(ls, v);
393 n++; 409 n++;
394 } 410 }
395 luaK_tostack(ls, &v, 0); /* keep open number of values of last expression */
396 return n; 411 return n;
397} 412}
398 413
399 414
400static void funcargs (LexState *ls, int slf) { 415static void funcargs (LexState *ls, expdesc *f) {
401 FuncState *fs = ls->fs; 416 FuncState *fs = ls->fs;
402 int slevel = fs->stacklevel - slf - 1; /* where is func in the stack */ 417 expdesc args;
418 int base, top;
403 switch (ls->t.token) { 419 switch (ls->t.token) {
404 case l_c('('): { /* funcargs -> `(' [ explist1 ] `)' */ 420 case l_c('('): { /* funcargs -> `(' [ explist1 ] `)' */
405 int line = ls->linenumber; 421 int line = ls->linenumber;
406 int nargs = 0;
407 next(ls); 422 next(ls);
408 if (ls->t.token != l_c(')')) /* arg list not empty? */ 423 if (ls->t.token == l_c(')')) /* arg list is empty? */
409 nargs = explist1(ls); 424 args.k = VVOID;
425 else {
426 explist1(ls, &args);
427 luaK_setcallreturns(fs, &args, NO_REG);
428 }
410 check_match(ls, l_c(')'), l_c('('), line); 429 check_match(ls, l_c(')'), l_c('('), line);
411#ifdef LUA_COMPAT_ARGRET
412 if (nargs > 0) /* arg list is not empty? */
413 luaK_setcallreturns(fs, 1); /* last call returns only 1 value */
414#else
415 UNUSED(nargs); /* to avoid warnings */
416#endif
417 break; 430 break;
418 } 431 }
419 case l_c('{'): { /* funcargs -> constructor */ 432 case l_c('{'): { /* funcargs -> constructor */
420 constructor(ls); 433 constructor(ls, &args);
421 break; 434 break;
422 } 435 }
423 case TK_STRING: { /* funcargs -> STRING */ 436 case TK_STRING: { /* funcargs -> STRING */
424 code_string(ls, ls->t.seminfo.ts); /* must use `seminfo' before `next' */ 437 codestring(ls, &args, ls->t.seminfo.ts);
425 next(ls); 438 next(ls); /* must use `seminfo' before `next' */
426 break; 439 break;
427 } 440 }
428 default: { 441 default: {
@@ -430,11 +443,22 @@ static void funcargs (LexState *ls, int slf) {
430 break; 443 break;
431 } 444 }
432 } 445 }
433 fs->stacklevel = slevel; /* call will remove function and arguments */ 446 lua_assert(f->k == VNONRELOC);
434 luaK_code2(fs, OP_CALL, slevel, MULT_RET); 447 base = f->u.i.info; /* base register for call */
448 if (args.k == VCALL)
449 top = NO_REG; /* open call */
450 else {
451 if (args.k != VVOID)
452 luaK_exp2nextreg(fs, &args); /* close last argument */
453 top = fs->freereg;
454 }
455 init_exp(f, VCALL, luaK_codeABC(fs, OP_CALL, base, top, 1));
456 fs->freereg = base+1; /* call remove function and arguments and leaves
457 (unless changed) one result */
435} 458}
436 459
437 460
461
438/* 462/*
439** {====================================================================== 463** {======================================================================
440** Rules for Constructors 464** Rules for Constructors
@@ -442,69 +466,82 @@ static void funcargs (LexState *ls, int slf) {
442*/ 466*/
443 467
444 468
445static void recfield (LexState *ls) { 469static void recfield (LexState *ls, expdesc *t) {
446 /* recfield -> (NAME | `['exp1`]') = exp1 */ 470 /* recfield -> (NAME | `['exp1`]') = exp1 */
471 FuncState *fs = ls->fs;
472 int reg = ls->fs->freereg;
473 expdesc key, val;
447 switch (ls->t.token) { 474 switch (ls->t.token) {
448 case TK_NAME: { 475 case TK_NAME: {
449 luaK_kstr(ls, checkname(ls)); 476 checkname(ls, &key);
450 break; 477 break;
451 } 478 }
452 case l_c('['): { 479 case l_c('['): {
453 next(ls); 480 luaY_index(ls, &key);
454 exp1(ls);
455 check(ls, l_c(']'));
456 break; 481 break;
457 } 482 }
458 default: luaK_error(ls, l_s("<name> or `[' expected")); 483 default: luaK_error(ls, l_s("<name> or `[' expected"));
459 } 484 }
460 check(ls, l_c('=')); 485 check(ls, l_c('='));
461 exp1(ls); 486 luaK_exp2RK(fs, &key);
487 expr(ls, &val);
488 luaK_exp2anyreg(fs, &val);
489 luaK_codeABC(fs, OP_SETTABLE, val.u.i.info, t->u.i.info,
490 luaK_exp2RK(fs, &key));
491 fs->freereg = reg; /* free registers */
462} 492}
463 493
464 494
465static int recfields (LexState *ls) { 495static int recfields (LexState *ls, expdesc *t) {
466 /* recfields -> recfield { `,' recfield } [`,'] */ 496 /* recfields -> recfield { `,' recfield } [`,'] */
467 FuncState *fs = ls->fs;
468 int t = fs->stacklevel-1; /* level of table on the stack */
469 int n = 1; /* at least one element */ 497 int n = 1; /* at least one element */
470 recfield(ls); 498 luaK_exp2nextreg(ls->fs, t);
471 while (ls->t.token == l_c(',') && 499 recfield(ls, t);
472 (next(ls), (ls->t.token != l_c(';') && ls->t.token != l_c('}')))) { 500 while (ls->t.token == l_c(',')) {
473 if (n%RFIELDS_PER_FLUSH == 0) 501 next(ls);
474 luaK_code1(fs, OP_SETMAP, t); 502 if (ls->t.token == l_c(';') || ls->t.token == l_c('}')) break;
475 recfield(ls); 503 recfield(ls, t);
476 n++; 504 n++;
477 } 505 }
478 luaK_code1(fs, OP_SETMAP, t);
479 return n; 506 return n;
480} 507}
481 508
482 509
483static int listfields (LexState *ls) { 510static int listfields (LexState *ls, expdesc *t) {
484 /* listfields -> exp1 { `,' exp1 } [`,'] */ 511 /* listfields -> exp1 { `,' exp1 } [`,'] */
485 expdesc v; 512 expdesc v;
486 FuncState *fs = ls->fs; 513 FuncState *fs = ls->fs;
487 int t = fs->stacklevel-1; /* level of table on the stack */
488 int n = 1; /* at least one element */ 514 int n = 1; /* at least one element */
515 int reg;
516 luaK_exp2nextreg(ls->fs, t);
517 reg = fs->freereg;
489 expr(ls, &v); 518 expr(ls, &v);
490 while (ls->t.token == l_c(',') && 519 while (ls->t.token == l_c(',') &&
491 (next(ls), (ls->t.token != l_c(';') && ls->t.token != l_c('}')))) { 520 (next(ls), (ls->t.token != l_c(';') && ls->t.token != l_c('}')))) {
492 luaK_tostack(ls, &v, 1); /* only one value from intermediate expressions */ 521 luaK_exp2nextreg(fs, &v);
493 luaX_checklimit(ls, n/LFIELDS_PER_FLUSH, MAXARG_A, 522 luaX_checklimit(ls, n, MAXARG_Bc,
494 l_s("`item groups' in a list initializer")); 523 l_s("`item groups' in a list initializer"));
495 if (n%LFIELDS_PER_FLUSH == 0) 524 if (n%LFIELDS_PER_FLUSH == 0) {
496 luaK_code2(fs, OP_SETLIST, (n-1)/LFIELDS_PER_FLUSH, t); 525 luaK_codeABc(fs, OP_SETLIST, t->u.i.info, n-1);
526 fs->freereg = reg; /* free registers */
527 }
497 expr(ls, &v); 528 expr(ls, &v);
498 n++; 529 n++;
499 } 530 }
500 luaK_tostack(ls, &v, 0); /* allow multiple values for last expression */ 531 if (v.k == VCALL) {
501 luaK_code2(fs, OP_SETLIST, (n-1)/LFIELDS_PER_FLUSH, t); 532 luaK_setcallreturns(fs, &v, NO_REG);
533 luaK_codeABc(fs, OP_SETLISTO, t->u.i.info, n-1);
534 }
535 else {
536 luaK_exp2nextreg(fs, &v);
537 luaK_codeABc(fs, OP_SETLIST, t->u.i.info, n-1);
538 }
539 fs->freereg = reg; /* free registers */
502 return n; 540 return n;
503} 541}
504 542
505 543
506 544static void constructor_part (LexState *ls, expdesc *t, Constdesc *cd) {
507static void constructor_part (LexState *ls, Constdesc *cd) {
508 switch (ls->t.token) { 545 switch (ls->t.token) {
509 case l_c(';'): case l_c('}'): { /* constructor_part -> empty */ 546 case l_c(';'): case l_c('}'): { /* constructor_part -> empty */
510 cd->n = 0; 547 cd->n = 0;
@@ -518,13 +555,13 @@ static void constructor_part (LexState *ls, Constdesc *cd) {
518 /* else go through to recfields */ 555 /* else go through to recfields */
519 } 556 }
520 case l_c('['): { /* constructor_part -> recfields */ 557 case l_c('['): { /* constructor_part -> recfields */
521 cd->n = recfields(ls); 558 cd->n = recfields(ls, t);
522 cd->k = 1; /* record */ 559 cd->k = 1; /* record */
523 break; 560 break;
524 } 561 }
525 default: { /* constructor_part -> listfields */ 562 default: { /* constructor_part -> listfields */
526 case_default: 563 case_default:
527 cd->n = listfields(ls); 564 cd->n = listfields(ls, t);
528 cd->k = 0; /* list */ 565 cd->k = 0; /* list */
529 break; 566 break;
530 } 567 }
@@ -532,25 +569,27 @@ static void constructor_part (LexState *ls, Constdesc *cd) {
532} 569}
533 570
534 571
535static void constructor (LexState *ls) { 572static void constructor (LexState *ls, expdesc *t) {
536 /* constructor -> `{' constructor_part [`;' constructor_part] `}' */ 573 /* constructor -> `{' constructor_part [`;' constructor_part] `}' */
537 FuncState *fs = ls->fs; 574 FuncState *fs = ls->fs;
538 int line = ls->linenumber; 575 int line = ls->linenumber;
539 int pc = luaK_code1(fs, OP_CREATETABLE, 0); 576 int n;
540 int nelems; 577 int pc;
541 Constdesc cd; 578 Constdesc cd;
579 pc = luaK_codeABc(fs, OP_NEWTABLE, 0, 0);
580 init_exp(t, VRELOCABLE, pc);
542 check(ls, l_c('{')); 581 check(ls, l_c('{'));
543 constructor_part(ls, &cd); 582 constructor_part(ls, t, &cd);
544 nelems = cd.n; 583 n = cd.n;
545 if (optional(ls, l_c(';'))) { 584 if (optional(ls, l_c(';'))) {
546 Constdesc other_cd; 585 Constdesc other_cd;
547 constructor_part(ls, &other_cd); 586 constructor_part(ls, t, &other_cd);
548 check_condition(ls, (cd.k != other_cd.k), l_s("invalid constructor syntax")); 587 check_condition(ls, (cd.k != other_cd.k), l_s("invalid constructor syntax"));
549 nelems += other_cd.n; 588 n += other_cd.n;
550 } 589 }
551 check_match(ls, l_c('}'), l_c('{'), line); 590 check_match(ls, l_c('}'), l_c('{'), line);
552 luaX_checklimit(ls, nelems, MAXARG_U, l_s("elements in a table constructor")); 591 luaX_checklimit(ls, n, MAXARG_Bc, l_s("elements in a table constructor"));
553 SETARG_U(fs->f->code[pc], nelems); /* set initial table size */ 592 SETARG_Bc(fs->f->code[pc], n); /* set initial table size */
554} 593}
555 594
556/* }====================================================================== */ 595/* }====================================================================== */
@@ -565,31 +604,30 @@ static void constructor (LexState *ls) {
565*/ 604*/
566 605
567static void primaryexp (LexState *ls, expdesc *v) { 606static void primaryexp (LexState *ls, expdesc *v) {
568 FuncState *fs = ls->fs;
569 switch (ls->t.token) { 607 switch (ls->t.token) {
570 case TK_NUMBER: { 608 case TK_NUMBER: {
571 lua_Number r = ls->t.seminfo.r; 609 init_exp(v, VNUMBER, 0);
572 next(ls); 610 v->u.n = ls->t.seminfo.r;
573 luaK_number(fs, r); 611 next(ls); /* must use `seminfo' before `next' */
574 break; 612 break;
575 } 613 }
576 case TK_STRING: { 614 case TK_STRING: {
577 code_string(ls, ls->t.seminfo.ts); /* must use `seminfo' before `next' */ 615 codestring(ls, v, ls->t.seminfo.ts);
578 next(ls); 616 next(ls); /* must use `seminfo' before `next' */
579 break; 617 break;
580 } 618 }
581 case TK_NIL: { 619 case TK_NIL: {
582 luaK_adjuststack(fs, -1); 620 init_exp(v, VNIL, 0);
583 next(ls); 621 next(ls);
584 break; 622 break;
585 } 623 }
586 case l_c('{'): { /* constructor */ 624 case l_c('{'): { /* constructor */
587 constructor(ls); 625 constructor(ls, v);
588 break; 626 break;
589 } 627 }
590 case TK_FUNCTION: { 628 case TK_FUNCTION: {
591 next(ls); 629 next(ls);
592 body(ls, 0, ls->linenumber); 630 body(ls, v, 0, ls->linenumber);
593 break; 631 break;
594 } 632 }
595 case l_c('('): { 633 case l_c('('): {
@@ -604,7 +642,7 @@ static void primaryexp (LexState *ls, expdesc *v) {
604 } 642 }
605 case l_c('%'): { 643 case l_c('%'): {
606 next(ls); /* skip `%' */ 644 next(ls); /* skip `%' */
607 pushupvalue(ls, str_checkname(ls)); 645 codeupvalue(ls, v, str_checkname(ls));
608 break; 646 break;
609 } 647 }
610 default: { 648 default: {
@@ -612,46 +650,38 @@ static void primaryexp (LexState *ls, expdesc *v) {
612 return; 650 return;
613 } 651 }
614 } 652 }
615 v->k = VEXP;
616 v->u.l.t = v->u.l.f = NO_JUMP;
617} 653}
618 654
619 655
620static void simpleexp (LexState *ls, expdesc *v) { 656static void simpleexp (LexState *ls, expdesc *v) {
621 /* simpleexp -> 657 /* simpleexp ->
622 primaryexp { `.' NAME | `[' exp `]' | `:' NAME funcargs | funcargs } */ 658 primaryexp { `.' NAME | `[' exp `]' | `:' NAME funcargs | funcargs } */
659 FuncState *fs = ls->fs;
623 primaryexp(ls, v); 660 primaryexp(ls, v);
624 for (;;) { 661 for (;;) {
625 switch (ls->t.token) { 662 switch (ls->t.token) {
626 case l_c('.'): { /* `.' NAME */ 663 case l_c('.'): { /* field */
627 next(ls); 664 luaY_field(ls, v);
628 luaK_tostack(ls, v, 1); /* `v' must be on stack */
629 luaK_kstr(ls, checkname(ls));
630 v->k = VINDEXED;
631 break; 665 break;
632 } 666 }
633 case l_c('['): { /* `[' exp1 `]' */ 667 case l_c('['): { /* `[' exp1 `]' */
634 next(ls); 668 expdesc key;
635 luaK_tostack(ls, v, 1); /* `v' must be on stack */ 669 luaK_exp2anyreg(fs, v);
636 v->k = VINDEXED; 670 luaY_index(ls, &key);
637 exp1(ls); 671 luaK_indexed(fs, v, &key);
638 check(ls, l_c(']'));
639 break; 672 break;
640 } 673 }
641 case l_c(':'): { /* `:' NAME funcargs */ 674 case l_c(':'): { /* `:' NAME funcargs */
675 expdesc key;
642 next(ls); 676 next(ls);
643 luaK_tostack(ls, v, 1); /* `v' must be on stack */ 677 checkname(ls, &key);
644 luaK_code1(ls->fs, OP_PUSHSELF, checkname(ls)); 678 luaK_self(fs, v, &key);
645 funcargs(ls, 1); 679 funcargs(ls, v);
646 v->k = VEXP;
647 v->u.l.t = v->u.l.f = NO_JUMP;
648 break; 680 break;
649 } 681 }
650 case l_c('('): case TK_STRING: case l_c('{'): { /* funcargs */ 682 case l_c('('): case TK_STRING: case l_c('{'): { /* funcargs */
651 luaK_tostack(ls, v, 1); /* `v' must be on stack */ 683 luaK_exp2nextreg(fs, v);
652 funcargs(ls, 0); 684 funcargs(ls, v);
653 v->k = VEXP;
654 v->u.l.t = v->u.l.f = NO_JUMP;
655 break; 685 break;
656 } 686 }
657 default: return; /* should be follow... */ 687 default: return; /* should be follow... */
@@ -714,7 +744,7 @@ static BinOpr subexpr (LexState *ls, expdesc *v, int limit) {
714 if (uop != OPR_NOUNOPR) { 744 if (uop != OPR_NOUNOPR) {
715 next(ls); 745 next(ls);
716 subexpr(ls, v, UNARY_PRIORITY); 746 subexpr(ls, v, UNARY_PRIORITY);
717 luaK_prefix(ls, uop, v); 747 luaK_prefix(ls->fs, uop, v);
718 } 748 }
719 else simpleexp(ls, v); 749 else simpleexp(ls, v);
720 /* expand while operators have priorities higher than `limit' */ 750 /* expand while operators have priorities higher than `limit' */
@@ -723,10 +753,10 @@ static BinOpr subexpr (LexState *ls, expdesc *v, int limit) {
723 expdesc v2; 753 expdesc v2;
724 BinOpr nextop; 754 BinOpr nextop;
725 next(ls); 755 next(ls);
726 luaK_infix(ls, op, v); 756 luaK_infix(ls->fs, op, v);
727 /* read sub-expression with higher priority */ 757 /* read sub-expression with higher priority */
728 nextop = subexpr(ls, &v2, (int)priority[op].right); 758 nextop = subexpr(ls, &v2, (int)priority[op].right);
729 luaK_posfix(ls, op, v, &v2); 759 luaK_posfix(ls->fs, op, v, &v2);
730 op = nextop; 760 op = nextop;
731 } 761 }
732 return op; /* return first untreated operator */ 762 return op; /* return first untreated operator */
@@ -737,13 +767,6 @@ static void expr (LexState *ls, expdesc *v) {
737 subexpr(ls, v, -1); 767 subexpr(ls, v, -1);
738} 768}
739 769
740
741static void exp1 (LexState *ls) {
742 expdesc v;
743 expr(ls, &v);
744 luaK_tostack(ls, &v, 1);
745}
746
747/* }==================================================================== */ 770/* }==================================================================== */
748 771
749 772
@@ -769,41 +792,87 @@ static void block (LexState *ls) {
769 FuncState *fs = ls->fs; 792 FuncState *fs = ls->fs;
770 int nactloc = fs->nactloc; 793 int nactloc = fs->nactloc;
771 chunk(ls); 794 chunk(ls);
772 luaK_adjuststack(fs, fs->nactloc - nactloc); /* remove local variables */
773 removelocalvars(ls, fs->nactloc - nactloc); 795 removelocalvars(ls, fs->nactloc - nactloc);
796 fs->freereg = nactloc; /* free registers used by locals */
774} 797}
775 798
776 799
777static int assignment (LexState *ls, expdesc *v, int nvars) { 800/*
778 int left = 0; /* number of values left in the stack after assignment */ 801** structure to chain all variables in the left-hand side of an
779 luaX_checklimit(ls, nvars, MAXVARSLH, l_s("variables in a multiple assignment")); 802** assignment
803*/
804struct LHS_assign {
805 struct LHS_assign *prev;
806 expdesc v; /* variable (global, local, or indexed) */
807};
808
809
810/*
811** check whether, in an assignment to a local variable, the local variable
812** is needed in a previous assignment (to a table). If so, save original
813** local value in a safe place and use this safe copy in the previous
814** assignment.
815*/
816static void check_conflict (LexState *ls, struct LHS_assign *lh, expdesc *v) {
817 FuncState *fs = ls->fs;
818 int extra = fs->freereg; /* eventual position to save local variable */
819 int conflict = 0;
820 for (; lh; lh = lh->prev) {
821 if (lh->v.k == VINDEXED) {
822 if (lh->v.u.i.info == v->u.i.info) { /* conflict? */
823 conflict = 1;
824 lh->v.u.i.info = extra; /* previous assignment will use safe copy */
825 }
826 if (lh->v.u.i.aux == v->u.i.info) { /* conflict? */
827 conflict = 1;
828 lh->v.u.i.aux = extra; /* previous assignment will use safe copy */
829 }
830 }
831 }
832 if (conflict) {
833 luaK_codeABC(fs, OP_MOVE, fs->freereg, v->u.i.info, 0); /* make copy */
834 luaK_reserveregs(fs, 1);
835 }
836}
837
838
839static void assignment (LexState *ls, struct LHS_assign *lh, int nvars) {
840 expdesc e;
841 check_condition(ls, lh->v.k == VLOCAL || lh->v.k == VGLOBAL ||
842 lh->v.k == VINDEXED,
843 l_s("syntax error"));
780 if (ls->t.token == l_c(',')) { /* assignment -> `,' simpleexp assignment */ 844 if (ls->t.token == l_c(',')) { /* assignment -> `,' simpleexp assignment */
781 expdesc nv; 845 struct LHS_assign nv;
846 nv.prev = lh;
782 next(ls); 847 next(ls);
783 simpleexp(ls, &nv); 848 simpleexp(ls, &nv.v);
784 check_condition(ls, (nv.k != VEXP), l_s("syntax error")); 849 if (nv.v.k == VLOCAL)
785 left = assignment(ls, &nv, nvars+1); 850 check_conflict(ls, lh, &nv.v);
851 assignment(ls, &nv, nvars+1);
786 } 852 }
787 else { /* assignment -> `=' explist1 */ 853 else { /* assignment -> `=' explist1 */
788 int nexps; 854 int nexps;
789 check(ls, l_c('=')); 855 check(ls, l_c('='));
790 nexps = explist1(ls); 856 nexps = explist1(ls, &e);
791 adjust_mult_assign(ls, nvars, nexps); 857 if (nexps != nvars) {
792 } 858 adjust_assign(ls, nvars, nexps, &e);
793 if (v->k != VINDEXED) 859 if (nexps > nvars)
794 luaK_storevar(ls, v); 860 ls->fs->freereg -= nexps - nvars; /* remove extra values */
795 else { /* there may be garbage between table-index and value */ 861 }
796 luaK_code2(ls->fs, OP_SETTABLE, left+nvars+2, 1); 862 else {
797 left += 2; 863 luaK_storevar(ls->fs, &lh->v, &e);
864 return; /* avoid default */
865 }
798 } 866 }
799 return left; 867 init_exp(&e, VNONRELOC, ls->fs->freereg-1); /* default assignment */
868 luaK_storevar(ls->fs, &lh->v, &e);
800} 869}
801 870
802 871
803static void cond (LexState *ls, expdesc *v) { 872static void cond (LexState *ls, expdesc *v) {
804 /* cond -> exp */ 873 /* cond -> exp */
805 expr(ls, v); /* read condition */ 874 expr(ls, v); /* read condition */
806 luaK_goiftrue(ls->fs, v, 0); 875 luaK_goiftrue(ls->fs, v);
807} 876}
808 877
809 878
@@ -819,7 +888,7 @@ static void whilestat (LexState *ls, int line) {
819 check(ls, TK_DO); 888 check(ls, TK_DO);
820 block(ls); 889 block(ls);
821 luaK_patchlist(fs, luaK_jump(fs), while_init); 890 luaK_patchlist(fs, luaK_jump(fs), while_init);
822 luaK_patchlist(fs, v.u.l.f, luaK_getlabel(fs)); 891 luaK_patchlist(fs, v.f, luaK_getlabel(fs));
823 check_match(ls, TK_END, TK_WHILE, line); 892 check_match(ls, TK_END, TK_WHILE, line);
824 leavebreak(fs, &bl); 893 leavebreak(fs, &bl);
825} 894}
@@ -836,20 +905,28 @@ static void repeatstat (LexState *ls, int line) {
836 block(ls); 905 block(ls);
837 check_match(ls, TK_UNTIL, TK_REPEAT, line); 906 check_match(ls, TK_UNTIL, TK_REPEAT, line);
838 cond(ls, &v); 907 cond(ls, &v);
839 luaK_patchlist(fs, v.u.l.f, repeat_init); 908 luaK_patchlist(fs, v.f, repeat_init);
840 leavebreak(fs, &bl); 909 leavebreak(fs, &bl);
841} 910}
842 911
843 912
913static void exp1 (LexState *ls) {
914 expdesc e;
915 expr(ls, &e);
916 luaK_exp2nextreg(ls->fs, &e);
917}
918
919
844static void forbody (LexState *ls, int nvar, OpCode prepfor, OpCode loopfor) { 920static void forbody (LexState *ls, int nvar, OpCode prepfor, OpCode loopfor) {
845 /* forbody -> DO block END */ 921 /* forbody -> DO block END */
846 FuncState *fs = ls->fs; 922 FuncState *fs = ls->fs;
847 int prep = luaK_code1(fs, prepfor, NO_JUMP); 923 int basereg = fs->freereg - nvar;
924 int prep = luaK_codeAsBc(fs, prepfor, basereg, NO_JUMP);
848 int blockinit = luaK_getlabel(fs); 925 int blockinit = luaK_getlabel(fs);
849 check(ls, TK_DO); 926 check(ls, TK_DO);
850 adjustlocalvars(ls, nvar); /* scope for control variables */ 927 adjustlocalvars(ls, nvar); /* scope for control variables */
851 block(ls); 928 block(ls);
852 luaK_patchlist(fs, luaK_code1(fs, loopfor, NO_JUMP), blockinit); 929 luaK_patchlist(fs, luaK_codeAsBc(fs, loopfor, basereg, NO_JUMP), blockinit);
853 luaK_fixfor(fs, prep, luaK_getlabel(fs)); 930 luaK_fixfor(fs, prep, luaK_getlabel(fs));
854 removelocalvars(ls, nvar); 931 removelocalvars(ls, nvar);
855} 932}
@@ -864,8 +941,10 @@ static void fornum (LexState *ls, TString *varname) {
864 exp1(ls); /* limit */ 941 exp1(ls); /* limit */
865 if (optional(ls, l_c(','))) 942 if (optional(ls, l_c(',')))
866 exp1(ls); /* optional step */ 943 exp1(ls); /* optional step */
867 else 944 else {
868 luaK_code1(fs, OP_PUSHINT, 1); /* default step */ 945 luaK_codeAsBc(fs, OP_LOADINT, fs->freereg, 1); /* default step */
946 luaK_reserveregs(fs, 1);
947 }
869 new_localvar(ls, varname, 0); 948 new_localvar(ls, varname, 0);
870 new_localvarstr(ls, l_s("(limit)"), 1); 949 new_localvarstr(ls, l_s("(limit)"), 1);
871 new_localvarstr(ls, l_s("(step)"), 2); 950 new_localvarstr(ls, l_s("(step)"), 2);
@@ -889,7 +968,8 @@ static void forlist (LexState *ls, TString *indexname) {
889 new_localvarstr(ls, l_s("(index)"), 1); 968 new_localvarstr(ls, l_s("(index)"), 1);
890 new_localvar(ls, indexname, 2); 969 new_localvar(ls, indexname, 2);
891 new_localvar(ls, valname, 3); 970 new_localvar(ls, valname, 3);
892 forbody(ls, 4, OP_LFORPREP, OP_LFORLOOP); 971 luaK_reserveregs(ls->fs, 3); /* registers for control, index and val */
972 forbody(ls, 4, OP_TFORPREP, OP_TFORLOOP);
893} 973}
894 974
895 975
@@ -928,17 +1008,17 @@ static void ifstat (LexState *ls, int line) {
928 test_then_block(ls, &v); /* IF cond THEN block */ 1008 test_then_block(ls, &v); /* IF cond THEN block */
929 while (ls->t.token == TK_ELSEIF) { 1009 while (ls->t.token == TK_ELSEIF) {
930 luaK_concat(fs, &escapelist, luaK_jump(fs)); 1010 luaK_concat(fs, &escapelist, luaK_jump(fs));
931 luaK_patchlist(fs, v.u.l.f, luaK_getlabel(fs)); 1011 luaK_patchlist(fs, v.f, luaK_getlabel(fs));
932 test_then_block(ls, &v); /* ELSEIF cond THEN block */ 1012 test_then_block(ls, &v); /* ELSEIF cond THEN block */
933 } 1013 }
934 if (ls->t.token == TK_ELSE) { 1014 if (ls->t.token == TK_ELSE) {
935 luaK_concat(fs, &escapelist, luaK_jump(fs)); 1015 luaK_concat(fs, &escapelist, luaK_jump(fs));
936 luaK_patchlist(fs, v.u.l.f, luaK_getlabel(fs)); 1016 luaK_patchlist(fs, v.f, luaK_getlabel(fs));
937 next(ls); /* skip ELSE */ 1017 next(ls); /* skip ELSE */
938 block(ls); /* `else' part */ 1018 block(ls); /* `else' part */
939 } 1019 }
940 else 1020 else
941 luaK_concat(fs, &escapelist, v.u.l.f); 1021 luaK_concat(fs, &escapelist, v.f);
942 luaK_patchlist(fs, escapelist, luaK_getlabel(fs)); 1022 luaK_patchlist(fs, escapelist, luaK_getlabel(fs));
943 check_match(ls, TK_END, TK_IF, line); 1023 check_match(ls, TK_END, TK_IF, line);
944} 1024}
@@ -948,35 +1028,32 @@ static void localstat (LexState *ls) {
948 /* stat -> LOCAL NAME {`,' NAME} [`=' explist1] */ 1028 /* stat -> LOCAL NAME {`,' NAME} [`=' explist1] */
949 int nvars = 0; 1029 int nvars = 0;
950 int nexps; 1030 int nexps;
1031 expdesc e;
951 do { 1032 do {
952 next(ls); /* skip LOCAL or `,' */ 1033 next(ls); /* skip LOCAL or `,' */
953 new_localvar(ls, str_checkname(ls), nvars++); 1034 new_localvar(ls, str_checkname(ls), nvars++);
954 } while (ls->t.token == l_c(',')); 1035 } while (ls->t.token == l_c(','));
955 if (optional(ls, l_c('='))) 1036 if (optional(ls, l_c('=')))
956 nexps = explist1(ls); 1037 nexps = explist1(ls, &e);
957 else 1038 else {
1039 e.k = VVOID;
958 nexps = 0; 1040 nexps = 0;
959 adjust_mult_assign(ls, nvars, nexps); 1041 }
1042 adjust_assign(ls, nvars, nexps, &e);
960 adjustlocalvars(ls, nvars); 1043 adjustlocalvars(ls, nvars);
961} 1044}
962 1045
963 1046
964static int funcname (LexState *ls, expdesc *v) { 1047static int funcname (LexState *ls, expdesc *v) {
965 /* funcname -> NAME {`.' NAME} [`:' NAME] */ 1048 /* funcname -> NAME {field} [`:' NAME] */
966 int needself = 0; 1049 int needself = 0;
967 singlevar(ls, str_checkname(ls), v); 1050 singlevar(ls, str_checkname(ls), v);
968 while (ls->t.token == l_c('.')) { 1051 while (ls->t.token == l_c('.')) {
969 next(ls); 1052 luaY_field(ls, v);
970 luaK_tostack(ls, v, 1);
971 luaK_kstr(ls, checkname(ls));
972 v->k = VINDEXED;
973 } 1053 }
974 if (ls->t.token == l_c(':')) { 1054 if (ls->t.token == l_c(':')) {
975 needself = 1; 1055 needself = 1;
976 next(ls); 1056 luaY_field(ls, v);
977 luaK_tostack(ls, v, 1);
978 luaK_kstr(ls, checkname(ls));
979 v->k = VINDEXED;
980 } 1057 }
981 return needself; 1058 return needself;
982} 1059}
@@ -985,26 +1062,25 @@ static int funcname (LexState *ls, expdesc *v) {
985static void funcstat (LexState *ls, int line) { 1062static void funcstat (LexState *ls, int line) {
986 /* funcstat -> FUNCTION funcname body */ 1063 /* funcstat -> FUNCTION funcname body */
987 int needself; 1064 int needself;
988 expdesc v; 1065 expdesc v, b;
989 next(ls); /* skip FUNCTION */ 1066 next(ls); /* skip FUNCTION */
990 needself = funcname(ls, &v); 1067 needself = funcname(ls, &v);
991 body(ls, needself, line); 1068 body(ls, &b, needself, line);
992 luaK_storevar(ls, &v); 1069 luaK_storevar(ls->fs, &v, &b);
993} 1070}
994 1071
995 1072
996static void exprstat (LexState *ls) { 1073static void exprstat (LexState *ls) {
997 /* stat -> func | assignment */ 1074 /* stat -> func | assignment */
998 FuncState *fs = ls->fs; 1075 FuncState *fs = ls->fs;
999 expdesc v; 1076 struct LHS_assign v;
1000 simpleexp(ls, &v); 1077 simpleexp(ls, &v.v);
1001 if (v.k == VEXP) { /* stat -> func */ 1078 if (v.v.k == VCALL) { /* stat -> func */
1002 check_condition(ls, luaK_lastisopen(fs), l_s("syntax error")); /* an upvalue? */ 1079 luaK_setcallreturns(fs, &v.v, 0); /* call statement uses no results */
1003 luaK_setcallreturns(fs, 0); /* call statement uses no results */
1004 } 1080 }
1005 else { /* stat -> assignment */ 1081 else { /* stat -> assignment */
1006 int left = assignment(ls, &v, 1); 1082 v.prev = NULL;
1007 luaK_adjuststack(fs, left); /* remove eventual garbage left on stack */ 1083 assignment(ls, &v, 1);
1008 } 1084 }
1009} 1085}
1010 1086
@@ -1012,26 +1088,45 @@ static void exprstat (LexState *ls) {
1012static void retstat (LexState *ls) { 1088static void retstat (LexState *ls) {
1013 /* stat -> RETURN explist */ 1089 /* stat -> RETURN explist */
1014 FuncState *fs = ls->fs; 1090 FuncState *fs = ls->fs;
1091 expdesc e;
1092 int first, last1; /* registers with returned values */
1015 next(ls); /* skip RETURN */ 1093 next(ls); /* skip RETURN */
1016 if (!block_follow(ls->t.token) && ls->t.token != l_c(';')) 1094 if (block_follow(ls->t.token) || ls->t.token == l_c(';'))
1017 explist1(ls); /* optional return values */ 1095 first = last1 = 0; /* return no values */
1018 luaK_code1(fs, OP_RETURN, ls->fs->nactloc); 1096 else {
1019 fs->stacklevel = fs->nactloc; /* removes all temp values */ 1097 int n = explist1(ls, &e); /* optional return values */
1098 if (e.k == VCALL) {
1099 luaK_setcallreturns(fs, &e, NO_REG);
1100 first = fs->nactloc;
1101 last1 = NO_REG; /* return all values */
1102 }
1103 else {
1104 if (n == 1) { /* only one value? */
1105 luaK_exp2anyreg(fs, &e);
1106 first = e.u.i.info;
1107 last1 = first+1; /* return only this value */
1108 }
1109 else {
1110 luaK_exp2nextreg(fs, &e); /* values must go to the `stack' */
1111 first = fs->nactloc;
1112 last1 = fs->freereg; /* return all `active' values */
1113 }
1114 }
1115 }
1116 luaK_codeABC(fs, OP_RETURN, first, last1, 0);
1117 fs->freereg = fs->nactloc; /* removes all temp values */
1020} 1118}
1021 1119
1022 1120
1023static void breakstat (LexState *ls) { 1121static void breakstat (LexState *ls) {
1024 /* stat -> BREAK [NAME] */ 1122 /* stat -> BREAK [NAME] */
1025 FuncState *fs = ls->fs; 1123 FuncState *fs = ls->fs;
1026 int currentlevel = fs->stacklevel;
1027 Breaklabel *bl = fs->bl; 1124 Breaklabel *bl = fs->bl;
1028 if (!bl) 1125 if (!bl)
1029 luaK_error(ls, l_s("no loop to break")); 1126 luaK_error(ls, l_s("no loop to break"));
1030 next(ls); /* skip BREAK */ 1127 next(ls); /* skip BREAK */
1031 luaK_adjuststack(fs, currentlevel - bl->stacklevel);
1032 luaK_concat(fs, &bl->breaklist, luaK_jump(fs)); 1128 luaK_concat(fs, &bl->breaklist, luaK_jump(fs));
1033 /* correct stack for compiler and symbolic execution */ 1129 /* correct stack for compiler and symbolic execution */
1034 luaK_adjuststack(fs, bl->stacklevel - currentlevel);
1035} 1130}
1036 1131
1037 1132
@@ -1105,7 +1200,7 @@ static void parlist (LexState *ls) {
1105} 1200}
1106 1201
1107 1202
1108static void body (LexState *ls, int needself, int line) { 1203static void body (LexState *ls, expdesc *e, int needself, int line) {
1109 /* body -> `(' parlist `)' chunk END */ 1204 /* body -> `(' parlist `)' chunk END */
1110 FuncState new_fs; 1205 FuncState new_fs;
1111 open_func(ls, &new_fs); 1206 open_func(ls, &new_fs);
@@ -1120,7 +1215,7 @@ static void body (LexState *ls, int needself, int line) {
1120 chunk(ls); 1215 chunk(ls);
1121 check_match(ls, TK_END, TK_FUNCTION, line); 1216 check_match(ls, TK_END, TK_FUNCTION, line);
1122 close_func(ls); 1217 close_func(ls);
1123 pushclosure(ls, &new_fs); 1218 pushclosure(ls, &new_fs, e);
1124} 1219}
1125 1220
1126 1221
@@ -1133,7 +1228,10 @@ static void chunk (LexState *ls) {
1133 while (!islast && !block_follow(ls->t.token)) { 1228 while (!islast && !block_follow(ls->t.token)) {
1134 islast = statement(ls); 1229 islast = statement(ls);
1135 optional(ls, l_c(';')); 1230 optional(ls, l_c(';'));
1136 lua_assert(ls->fs->stacklevel == ls->fs->nactloc); 1231if (ls->fs->freereg < ls->fs->nactloc)
1232printf(">>>>>>> %d %d\n", ls->fs->freereg, ls->fs->nactloc);
1233 lua_assert(ls->fs->freereg >= ls->fs->nactloc);
1234 ls->fs->freereg = ls->fs->nactloc; /* free registers */
1137 } 1235 }
1138} 1236}
1139 1237
diff --git a/lparser.h b/lparser.h
index a754b3be..b55270c1 100644
--- a/lparser.h
+++ b/lparser.h
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lparser.h,v 1.29 2000/12/28 12:55:41 roberto Exp roberto $ 2** $Id: lparser.h,v 1.30 2001/02/20 18:28:11 roberto Exp roberto $
3** LL(1) Parser and code generator for Lua 3** LL(1) Parser and code generator for Lua
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -16,25 +16,32 @@
16*/ 16*/
17 17
18typedef enum { 18typedef enum {
19 VGLOBAL, 19 VVOID, /* no value */
20 VLOCAL, 20 VNIL,
21 VINDEXED, 21 VNUMBER, /* n = value */
22 VEXP 22 VK, /* info = index of constant in `k' */
23 VGLOBAL, /* info = index of global name in `k' */
24 VLOCAL, /* info = local register */
25 VINDEXED, /* info = table register; aux = index register (or `k') */
26 VRELOCABLE, /* info = instruction pc */
27 VNONRELOC, /* info = result register */
28 VJMP, /* info = result register */
29 VCALL /* info = result register */
23} expkind; 30} expkind;
24 31
25typedef struct expdesc { 32typedef struct expdesc {
26 expkind k; 33 expkind k;
27 union { 34 union {
28 int index; /* VGLOBAL: `kstr' index of global name; VLOCAL: stack index */
29 struct { 35 struct {
30 int t; /* patch list of `exit when true' */ 36 int info, aux;
31 int f; /* patch list of `exit when false' */ 37 } i;
32 } l; 38 lua_Number n;
33 } u; 39 } u;
40 int t; /* patch list of `exit when true' */
41 int f; /* patch list of `exit when false' */
34} expdesc; 42} expdesc;
35 43
36 44
37
38/* state needed to generate code for a given function */ 45/* state needed to generate code for a given function */
39typedef struct FuncState { 46typedef struct FuncState {
40 Proto *f; /* current function header */ 47 Proto *f; /* current function header */
@@ -44,10 +51,9 @@ typedef struct FuncState {
44 int pc; /* next position to code (equivalent to `ncode') */ 51 int pc; /* next position to code (equivalent to `ncode') */
45 int lasttarget; /* `pc' of last `jump target' */ 52 int lasttarget; /* `pc' of last `jump target' */
46 int jlt; /* list of jumps to `lasttarget' */ 53 int jlt; /* list of jumps to `lasttarget' */
47 int stacklevel; /* number of values on activation register */ 54 int freereg; /* first free register */
48 int nkstr; /* number of elements in `kstr' */ 55 int nk; /* number of elements in `k' */
49 int nkproto; /* number of elements in `kproto' */ 56 int nkproto; /* number of elements in `kproto' */
50 int nknum; /* number of elements in `knum' */
51 int nlineinfo; /* number of elements in `lineinfo' */ 57 int nlineinfo; /* number of elements in `lineinfo' */
52 int nlocvars; /* number of elements in `locvars' */ 58 int nlocvars; /* number of elements in `locvars' */
53 int nactloc; /* number of active local variables */ 59 int nactloc; /* number of active local variables */
diff --git a/ltests.c b/ltests.c
index 77fc6048..95d7813d 100644
--- a/ltests.c
+++ b/ltests.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: ltests.c,v 1.79 2001/04/17 17:35:54 roberto Exp roberto $ 2** $Id: ltests.c,v 1.80 2001/04/23 16:35:45 roberto Exp roberto $
3** Internal Module for Debugging of the Lua Implementation 3** Internal Module for Debugging of the Lua Implementation
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -140,77 +140,65 @@ void *debug_realloc (void *block, size_t oldsize, size_t size) {
140 140
141 141
142static const l_char *const instrname[NUM_OPCODES] = { 142static const l_char *const instrname[NUM_OPCODES] = {
143 l_s("RETURN"), 143 l_s("OP_MOVE"),
144 l_s("CALL"), 144 l_s("OP_LOADK"),
145 l_s("PUSHNIL"), 145 l_s("OP_LOADINT"),
146 l_s("POP"), 146 l_s("OP_LOADNIL"),
147 l_s("PUSHINT"), 147 l_s("OP_LOADUPVAL"),
148 l_s("PUSHSTRING"), 148 l_s("OP_GETGLOBAL"),
149 l_s("PUSHNUM"), 149 l_s("OP_GETTABLE"),
150 l_s("PUSHNEGNUM"), 150 l_s("OP_SETGLOBAL"),
151 l_s("PUSHUPVALUE"), 151 l_s("OP_SETTABLE"),
152 l_s("GETLOCAL"), 152 l_s("OP_NEWTABLE"),
153 l_s("GETGLOBAL"), 153 l_s("OP_SELF"),
154 l_s("GETTABLE"), 154 l_s("OP_ADD"),
155 l_s("GETDOTTED"), 155 l_s("OP_SUB"),
156 l_s("GETINDEXED"), 156 l_s("OP_MUL"),
157 l_s("PUSHSELF"), 157 l_s("OP_DIV"),
158 l_s("CREATETABLE"), 158 l_s("OP_POW"),
159 l_s("SETLOCAL"), 159 l_s("OP_UNM"),
160 l_s("SETGLOBAL"), 160 l_s("OP_NOT"),
161 l_s("SETTABLE"), 161 l_s("OP_CONCAT"),
162 l_s("SETLIST"), 162 l_s("OP_JMP"),
163 l_s("SETMAP"), 163 l_s("OP_CJMP"),
164 l_s("ADD"), 164 l_s("OP_TESTEQ"),
165 l_s("ADDI"), 165 l_s("OP_TESTNE"),
166 l_s("SUB"), 166 l_s("OP_TESTLT"),
167 l_s("MULT"), 167 l_s("OP_TESTLE"),
168 l_s("DIV"), 168 l_s("OP_TESTGT"),
169 l_s("POW"), 169 l_s("OP_TESTGE"),
170 l_s("CONCAT"), 170 l_s("OP_TESTT"),
171 l_s("MINUS"), 171 l_s("OP_TESTF"),
172 l_s("NOT"), 172 l_s("OP_NILJMP"),
173 l_s("JMPNE"), 173 l_s("OP_CALL"),
174 l_s("JMPEQ"), 174 l_s("OP_RETURN"),
175 l_s("JMPLT"), 175 l_s("OP_FORPREP"),
176 l_s("JMPLE"), 176 l_s("OP_FORLOOP"),
177 l_s("JMPGT"), 177 l_s("OP_LFORPREP"),
178 l_s("JMPGE"), 178 l_s("OP_LFORLOOP"),
179 l_s("JMPT"), 179 l_s("OP_SETLIST"),
180 l_s("JMPF"), 180 l_s("OP_CLOSURE")
181 l_s("JMPONT"),
182 l_s("JMPONF"),
183 l_s("JMP"),
184 l_s("PUSHNILJMP"),
185 l_s("FORPREP"),
186 l_s("FORLOOP"),
187 l_s("LFORPREP"),
188 l_s("LFORLOOP"),
189 l_s("CLOSURE")
190}; 181};
191 182
192 183
193static void pushop (lua_State *L, Proto *p, int pc) { 184static l_char *buildop (Proto *p, int pc, l_char *buff) {
194 l_char buff[100];
195 Instruction i = p->code[pc]; 185 Instruction i = p->code[pc];
196 OpCode o = GET_OPCODE(i); 186 OpCode o = GET_OPCODE(i);
197 const l_char *name = instrname[o]; 187 const l_char *name = instrname[o];
198 sprintf(buff, l_s("%5d - "), luaG_getline(p->lineinfo, pc, 1, NULL)); 188 sprintf(buff, l_s("%4d - "), pc);
199 switch ((enum Mode)luaK_opproperties[o].mode) { 189 switch (getOpMode(o)) {
200 case iO: 190 case iABC:
201 sprintf(buff+8, l_s("%-12s"), name); 191 sprintf(buff+strlen(buff), l_s("%-12s%4d %4d %4d"), name,
192 GETARG_A(i), GETARG_B(i), GETARG_C(i));
202 break; 193 break;
203 case iU: 194 case iABc:
204 sprintf(buff+8, l_s("%-12s%4u"), name, GETARG_U(i)); 195 sprintf(buff+strlen(buff), l_s("%-12s%4d %4d"), name, GETARG_A(i), GETARG_Bc(i));
205 break; 196 break;
206 case iS: 197 case iAsBc:
207 sprintf(buff+8, l_s("%-12s%4d"), name, GETARG_S(i)); 198 sprintf(buff+strlen(buff), l_s("%-12s%4d %4d"), name, GETARG_A(i), GETARG_sBc(i));
208 break;
209 case iAB:
210 sprintf(buff+8, l_s("%-12s%4d %4d"), name, GETARG_A(i), GETARG_B(i));
211 break; 199 break;
212 } 200 }
213 lua_pushstring(L, buff); 201 return buff;
214} 202}
215 203
216 204
@@ -224,24 +212,25 @@ static int listcode (lua_State *L) {
224 setnameval(L, l_s("maxstack"), p->maxstacksize); 212 setnameval(L, l_s("maxstack"), p->maxstacksize);
225 setnameval(L, l_s("numparams"), p->numparams); 213 setnameval(L, l_s("numparams"), p->numparams);
226 for (pc=0; pc<p->sizecode; pc++) { 214 for (pc=0; pc<p->sizecode; pc++) {
215 l_char buff[100];
227 lua_pushnumber(L, pc+1); 216 lua_pushnumber(L, pc+1);
228 pushop(L, p, pc); 217 lua_pushstring(L, buildop(p, pc, buff));
229 lua_settable(L, -3); 218 lua_settable(L, -3);
230 } 219 }
231 return 1; 220 return 1;
232} 221}
233 222
234 223
235static int liststrings (lua_State *L) { 224static int listk (lua_State *L) {
236 Proto *p; 225 Proto *p;
237 int i; 226 int i;
238 luaL_arg_check(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 227 luaL_arg_check(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
239 1, l_s("Lua function expected")); 228 1, l_s("Lua function expected"));
240 p = clvalue(luaA_index(L, 1))->f.l; 229 p = clvalue(luaA_index(L, 1))->f.l;
241 lua_newtable(L); 230 lua_newtable(L);
242 for (i=0; i<p->sizekstr; i++) { 231 for (i=0; i<p->sizek; i++) {
243 lua_pushnumber(L, i+1); 232 lua_pushnumber(L, i+1);
244 lua_pushstring(L, getstr(p->kstr[i])); 233 luaA_pushobject(L, p->k+i);
245 lua_settable(L, -3); 234 lua_settable(L, -3);
246 } 235 }
247 return 1; 236 return 1;
@@ -276,20 +265,10 @@ static int get_limits (lua_State *L) {
276 lua_newtable(L); 265 lua_newtable(L);
277 setnameval(L, l_s("BITS_INT"), BITS_INT); 266 setnameval(L, l_s("BITS_INT"), BITS_INT);
278 setnameval(L, l_s("LFPF"), LFIELDS_PER_FLUSH); 267 setnameval(L, l_s("LFPF"), LFIELDS_PER_FLUSH);
279 setnameval(L, l_s("MAXARG_A"), MAXARG_A);
280 setnameval(L, l_s("MAXARG_B"), MAXARG_B);
281 setnameval(L, l_s("MAXARG_S"), MAXARG_S);
282 setnameval(L, l_s("MAXARG_U"), MAXARG_U);
283 setnameval(L, l_s("MAXLOCALS"), MAXLOCALS); 268 setnameval(L, l_s("MAXLOCALS"), MAXLOCALS);
284 setnameval(L, l_s("MAXPARAMS"), MAXPARAMS); 269 setnameval(L, l_s("MAXPARAMS"), MAXPARAMS);
285 setnameval(L, l_s("MAXSTACK"), MAXSTACK); 270 setnameval(L, l_s("MAXSTACK"), MAXSTACK);
286 setnameval(L, l_s("MAXUPVALUES"), MAXUPVALUES); 271 setnameval(L, l_s("MAXUPVALUES"), MAXUPVALUES);
287 setnameval(L, l_s("MAXVARSLH"), MAXVARSLH);
288 setnameval(L, l_s("RFPF"), RFIELDS_PER_FLUSH);
289 setnameval(L, l_s("SIZE_A"), SIZE_A);
290 setnameval(L, l_s("SIZE_B"), SIZE_B);
291 setnameval(L, l_s("SIZE_OP"), SIZE_OP);
292 setnameval(L, l_s("SIZE_U"), SIZE_U);
293 return 1; 272 return 1;
294} 273}
295 274
@@ -700,7 +679,7 @@ static const struct luaL_reg tests_funcs[] = {
700 {l_s("hash"), hash_query}, 679 {l_s("hash"), hash_query},
701 {l_s("limits"), get_limits}, 680 {l_s("limits"), get_limits},
702 {l_s("listcode"), listcode}, 681 {l_s("listcode"), listcode},
703 {l_s("liststrings"), liststrings}, 682 {l_s("listk"), listk},
704 {l_s("listlocals"), listlocals}, 683 {l_s("listlocals"), listlocals},
705 {l_s("loadlib"), loadlib}, 684 {l_s("loadlib"), loadlib},
706 {l_s("querystr"), string_query}, 685 {l_s("querystr"), string_query},
diff --git a/lvm.c b/lvm.c
index 9c1b13d0..4cead1d9 100644
--- a/lvm.c
+++ b/lvm.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lvm.c,v 1.177 2001/03/26 14:31:49 roberto Exp roberto $ 2** $Id: lvm.c,v 1.178 2001/04/06 18:25:00 roberto Exp roberto $
3** Lua virtual machine 3** Lua virtual machine
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -28,15 +28,14 @@
28 28
29 29
30 30
31int luaV_tonumber (TObject *obj) { 31const TObject *luaV_tonumber (const TObject *obj, TObject *n) {
32 if (ttype(obj) != LUA_TSTRING) 32 if (ttype(obj) == LUA_TNUMBER) return obj;
33 return 1; 33 if (ttype(obj) == LUA_TSTRING && luaO_str2d(svalue(obj), &nvalue(n))) {
34 else { 34 ttype(n) = LUA_TNUMBER;
35 if (!luaO_str2d(svalue(obj), &nvalue(obj))) 35 return n;
36 return 2;
37 ttype(obj) = LUA_TNUMBER;
38 return 0;
39 } 36 }
37 else
38 return NULL;
40} 39}
41 40
42 41
@@ -148,8 +147,7 @@ void luaV_gettable (lua_State *L, StkId t, TObject *key, StkId res) {
148 } 147 }
149 } 148 }
150 /* else will call the tag method */ 149 /* else will call the tag method */
151 } 150 } else { /* not a table; try a `gettable' tag method */
152 else { /* not a table; try a `gettable' tag method */
153 tm = luaT_gettmbyObj(G(L), t, TM_GETTABLE); 151 tm = luaT_gettmbyObj(G(L), t, TM_GETTABLE);
154 if (tm == NULL) /* no tag method? */ 152 if (tm == NULL) /* no tag method? */
155 luaG_typeerror(L, t, l_s("index")); 153 luaG_typeerror(L, t, l_s("index"));
@@ -162,7 +160,7 @@ void luaV_gettable (lua_State *L, StkId t, TObject *key, StkId res) {
162/* 160/*
163** Receives table at `t', key at `key' and value at `val'. 161** Receives table at `t', key at `key' and value at `val'.
164*/ 162*/
165void luaV_settable (lua_State *L, StkId t, StkId key, StkId val) { 163void luaV_settable (lua_State *L, StkId t, TObject *key, StkId val) {
166 Closure *tm; 164 Closure *tm;
167 if (ttype(t) == LUA_TTABLE) { /* `t' is a table? */ 165 if (ttype(t) == LUA_TTABLE) { /* `t' is a table? */
168 int tg = hvalue(t)->htag; 166 int tg = hvalue(t)->htag;
@@ -172,8 +170,7 @@ void luaV_settable (lua_State *L, StkId t, StkId key, StkId val) {
172 return; 170 return;
173 } 171 }
174 /* else will call the tag method */ 172 /* else will call the tag method */
175 } 173 } else { /* not a table; try a `settable' tag method */
176 else { /* not a table; try a `settable' tag method */
177 tm = luaT_gettmbyObj(G(L), t, TM_SETTABLE); 174 tm = luaT_gettmbyObj(G(L), t, TM_SETTABLE);
178 if (tm == NULL) /* no tag method? */ 175 if (tm == NULL) /* no tag method? */
179 luaG_typeerror(L, t, l_s("index")); 176 luaG_typeerror(L, t, l_s("index"));
@@ -188,8 +185,7 @@ void luaV_getglobal (lua_State *L, TString *name, StkId res) {
188 if (!HAS_TM_GETGLOBAL(L, ttype(value)) || /* is there a tag method? */ 185 if (!HAS_TM_GETGLOBAL(L, ttype(value)) || /* is there a tag method? */
189 (tm = luaT_gettmbyObj(G(L), value, TM_GETGLOBAL)) == NULL) { 186 (tm = luaT_gettmbyObj(G(L), value, TM_GETGLOBAL)) == NULL) {
190 setobj(res, value); /* default behavior */ 187 setobj(res, value); /* default behavior */
191 } 188 } else
192 else
193 callTM(L, l_s("csor"), tm, name, value, res); 189 callTM(L, l_s("csor"), tm, name, value, res);
194} 190}
195 191
@@ -200,8 +196,7 @@ void luaV_setglobal (lua_State *L, TString *name, StkId val) {
200 if (!HAS_TM_SETGLOBAL(L, ttype(oldvalue)) || /* no tag methods? */ 196 if (!HAS_TM_SETGLOBAL(L, ttype(oldvalue)) || /* no tag methods? */
201 (tm = luaT_gettmbyObj(G(L), oldvalue, TM_SETGLOBAL)) == NULL) { 197 (tm = luaT_gettmbyObj(G(L), oldvalue, TM_SETGLOBAL)) == NULL) {
202 setobj(oldvalue, val); /* raw set */ 198 setobj(oldvalue, val); /* raw set */
203 } 199 } else
204 else
205 callTM(L, l_s("csoo"), tm, name, oldvalue, val); 200 callTM(L, l_s("csoo"), tm, name, oldvalue, val);
206} 201}
207 202
@@ -224,9 +219,10 @@ static int call_binTM (lua_State *L, const TObject *p1, const TObject *p2,
224} 219}
225 220
226 221
227static void call_arith (lua_State *L, StkId p1, TMS event) { 222static void call_arith (lua_State *L, StkId p1, TObject *p2,
228 if (!call_binTM(L, p1, p1+1, p1, event)) 223 StkId res, TMS event) {
229 luaG_binerror(L, p1, LUA_TNUMBER, l_s("perform arithmetic on")); 224 if (!call_binTM(L, p1, p2, res, event))
225 luaG_aritherror(L, p1, p2);
230} 226}
231 227
232 228
@@ -270,9 +266,8 @@ void luaV_strconc (lua_State *L, int total, StkId top) {
270 int n = 2; /* number of elements handled in this pass (at least 2) */ 266 int n = 2; /* number of elements handled in this pass (at least 2) */
271 if (tostring(L, top-2) || tostring(L, top-1)) { 267 if (tostring(L, top-2) || tostring(L, top-1)) {
272 if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT)) 268 if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
273 luaG_binerror(L, top-2, LUA_TSTRING, l_s("concat")); 269 luaG_concaterror(L, top-2, top-1);
274 } 270 } else if (tsvalue(top-1)->len > 0) { /* if len=0, do nothing */
275 else if (tsvalue(top-1)->len > 0) { /* if len=0, do nothing */
276 /* at least two string values; get as many as possible */ 271 /* at least two string values; get as many as possible */
277 lu_mem tl = (lu_mem)tsvalue(top-1)->len + (lu_mem)tsvalue(top-2)->len; 272 lu_mem tl = (lu_mem)tsvalue(top-1)->len + (lu_mem)tsvalue(top-2)->len;
278 l_char *buffer; 273 l_char *buffer;
@@ -321,7 +316,32 @@ static void adjust_varargs (lua_State *L, StkId base, int nfixargs) {
321 316
322 317
323 318
324#define dojump(pc, i) ((pc) += GETARG_S(i)) 319/*
320** some macros for common tasks in `luaV_execute'
321*/
322
323#define runtime_check(L, c) { if (!(c)) return L->top; }
324
325#define RA(i) (base+GETARG_A(i))
326#define RB(i) (base+GETARG_B(i))
327#define RC(i) (base+GETARG_C(i))
328#define RKC(i) ((GETARG_C(i) < MAXSTACK) ? \
329 base+GETARG_C(i) : \
330 tf->k+GETARG_C(i)-MAXSTACK)
331#define KBc(i) (tf->k+GETARG_Bc(i))
332
333#define Arith(op, optm) { \
334 const TObject *b = RB(i); const TObject *c = RKC(i); \
335 TObject tempb, tempc; \
336 if ((ttype(b) == LUA_TNUMBER || (b = luaV_tonumber(b, &tempb)) != NULL) && \
337 (ttype(c) == LUA_TNUMBER || (c = luaV_tonumber(c, &tempc)) != NULL)) { \
338 setnvalue(RA(i), nvalue(b) op nvalue(c)); \
339 } else \
340 call_arith(L, RB(i), RKC(i), RA(i), optm); \
341}
342
343
344#define dojump(pc, i) ((pc) += GETARG_sBc(i))
325 345
326/* 346/*
327** Executes the given Lua function. Parameters are between [base,top). 347** Executes the given Lua function. Parameters are between [base,top).
@@ -329,328 +349,294 @@ static void adjust_varargs (lua_State *L, StkId base, int nfixargs) {
329*/ 349*/
330StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) { 350StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
331 const Proto *const tf = cl->f.l; 351 const Proto *const tf = cl->f.l;
332 StkId top; /* keep top local, for performance */ 352 const Instruction *pc;
333 const Instruction *pc = tf->code; 353 lua_Hook linehook;
334 const lua_Hook linehook = L->linehook;
335 L->ci->pc = &pc;
336 if (tf->is_vararg) /* varargs? */ 354 if (tf->is_vararg) /* varargs? */
337 adjust_varargs(L, base, tf->numparams); 355 adjust_varargs(L, base, tf->numparams);
338 luaD_adjusttop(L, base, tf->maxstacksize); 356 luaD_adjusttop(L, base, tf->maxstacksize);
339 top = base+tf->numparams+tf->is_vararg; 357 pc = tf->code;
358 L->ci->pc = &pc;
359 linehook = L->linehook;
340 /* main loop of interpreter */ 360 /* main loop of interpreter */
341 for (;;) { 361 for (;;) {
342 const Instruction i = *pc++; 362 const Instruction i = *pc++;
343 lua_assert(L->top == base+tf->maxstacksize);
344 if (linehook) 363 if (linehook)
345 traceexec(L, linehook); 364 traceexec(L, linehook);
346 switch (GET_OPCODE(i)) { 365 switch (GET_OPCODE(i)) {
347 case OP_RETURN: { 366 case OP_MOVE: {
348 L->top = top; 367 setobj(RA(i), RB(i));
349 return base+GETARG_U(i);
350 }
351 case OP_CALL: {
352 int nres = GETARG_B(i);
353 if (nres == MULT_RET) nres = LUA_MULTRET;
354 L->top = top;
355 luaD_call(L, base+GETARG_A(i), nres);
356 top = L->top;
357 L->top = base+tf->maxstacksize;
358 break;
359 }
360 case OP_PUSHNIL: {
361 int n = GETARG_U(i);
362 lua_assert(n>0);
363 do {
364 setnilvalue(top++);
365 } while (--n > 0);
366 break;
367 }
368 case OP_POP: {
369 top -= GETARG_U(i);
370 break;
371 }
372 case OP_PUSHINT: {
373 setnvalue(top, (lua_Number)GETARG_S(i));
374 top++;
375 break;
376 }
377 case OP_PUSHSTRING: {
378 setsvalue(top, tf->kstr[GETARG_U(i)]);
379 top++;
380 break; 368 break;
381 } 369 }
382 case OP_PUSHNUM: { 370 case OP_LOADK: {
383 setnvalue(top, tf->knum[GETARG_U(i)]); 371 setobj(RA(i), KBc(i));
384 top++;
385 break; 372 break;
386 } 373 }
387 case OP_PUSHNEGNUM: { 374 case OP_LOADINT: {
388 setnvalue(top, -tf->knum[GETARG_U(i)]); 375 setnvalue(RA(i), (lua_Number)GETARG_sBc(i));
389 top++;
390 break; 376 break;
391 } 377 }
392 case OP_PUSHUPVALUE: { 378 case OP_LOADUPVAL: {
393 setobj(top++, &cl->upvalue[GETARG_U(i)]); 379 setobj(RA(i), cl->upvalue+GETARG_Bc(i));
394 break; 380 break;
395 } 381 }
396 case OP_GETLOCAL: { 382 case OP_LOADNIL: {
397 setobj(top++, base+GETARG_U(i)); 383 TObject *ra = RA(i);
384 TObject *rb = RB(i);
385 do {
386 setnilvalue(ra++);
387 } while (ra <= rb);
398 break; 388 break;
399 } 389 }
400 case OP_GETGLOBAL: { 390 case OP_GETGLOBAL: {
401 luaV_getglobal(L, tf->kstr[GETARG_U(i)], top); 391 lua_assert(ttype(KBc(i)) == LUA_TSTRING);
402 top++; 392 luaV_getglobal(L, tsvalue(KBc(i)), RA(i));
403 break; 393 break;
404 } 394 }
405 case OP_GETTABLE: { 395 case OP_GETTABLE: {
406 top--; 396 luaV_gettable(L, RB(i), RKC(i), RA(i));
407 luaV_gettable(L, top-1, top, top-1);
408 break;
409 }
410 case OP_GETDOTTED: {
411 setsvalue(top, tf->kstr[GETARG_U(i)]);
412 luaV_gettable(L, top-1, top, top-1);
413 break;
414 }
415 case OP_GETINDEXED: {
416 luaV_gettable(L, top-1, base+GETARG_U(i), top-1);
417 break;
418 }
419 case OP_PUSHSELF: {
420 setobj(top, top-1);
421 setsvalue(top+1, tf->kstr[GETARG_U(i)]);
422 luaV_gettable(L, top-1, top+1, top-1);
423 top++;
424 break;
425 }
426 case OP_CREATETABLE: {
427 luaC_checkGC(L);
428 sethvalue(top, luaH_new(L, GETARG_U(i)));
429 top++;
430 break;
431 }
432 case OP_SETLOCAL: {
433 setobj(base+GETARG_U(i), --top);
434 break; 397 break;
435 } 398 }
436 case OP_SETGLOBAL: { 399 case OP_SETGLOBAL: {
437 top--; 400 lua_assert(ttype(KBc(i)) == LUA_TSTRING);
438 luaV_setglobal(L, tf->kstr[GETARG_U(i)], top); 401 luaV_setglobal(L, tsvalue(KBc(i)), RA(i));
439 break; 402 break;
440 } 403 }
441 case OP_SETTABLE: { 404 case OP_SETTABLE: {
442 StkId t = top-GETARG_A(i); 405 luaV_settable(L, RB(i), RKC(i), RA(i));
443 luaV_settable(L, t, t+1, top-1);
444 top -= GETARG_B(i); /* pop values */
445 break; 406 break;
446 } 407 }
447 case OP_SETLIST: { 408 case OP_NEWTABLE: {
448 int aux = GETARG_A(i) * LFIELDS_PER_FLUSH; 409 luaC_checkGC(L);
449 TObject *t = base+GETARG_B(i); 410 sethvalue(RA(i), luaH_new(L, GETARG_Bc(i)));
450 Hash *h = hvalue(t);
451 int n;
452 for (n = top-t-1; n; n--)
453 setobj(luaH_setnum(L, h, n+aux), --top);
454 break; 411 break;
455 } 412 }
456 case OP_SETMAP: { 413 case OP_SELF: {
457 TObject *t = base+GETARG_U(i); 414 StkId ra = RA(i);
458 Hash *h = hvalue(t); 415 StkId rb = RB(i);
459 while (top-1 > t) { 416 setobj(ra+1, rb);
460 top-=2; 417 luaV_gettable(L, rb, RKC(i), ra);
461 setobj(luaH_set(L, h, top), top+1);
462 }
463 break; 418 break;
464 } 419 }
465 case OP_ADD: { 420 case OP_ADD: {
466 if (tonumber(top-2) || tonumber(top-1)) 421 Arith( + , TM_ADD);
467 call_arith(L, top-2, TM_ADD);
468 else
469 nvalue(top-2) += nvalue(top-1);
470 top--;
471 break;
472 }
473 case OP_ADDI: {
474 if (tonumber(top-1)) {
475 setnvalue(top, (lua_Number)GETARG_S(i));
476 call_arith(L, top-1, TM_ADD);
477 }
478 else
479 nvalue(top-1) += (lua_Number)GETARG_S(i);
480 break; 422 break;
481 } 423 }
482 case OP_SUB: { 424 case OP_SUB: {
483 if (tonumber(top-2) || tonumber(top-1)) 425 Arith( - , TM_SUB);
484 call_arith(L, top-2, TM_SUB);
485 else
486 nvalue(top-2) -= nvalue(top-1);
487 top--;
488 break; 426 break;
489 } 427 }
490 case OP_MULT: { 428 case OP_MUL: {
491 if (tonumber(top-2) || tonumber(top-1)) 429 Arith( * , TM_MUL);
492 call_arith(L, top-2, TM_MUL);
493 else
494 nvalue(top-2) *= nvalue(top-1);
495 top--;
496 break; 430 break;
497 } 431 }
498 case OP_DIV: { 432 case OP_DIV: {
499 if (tonumber(top-2) || tonumber(top-1)) 433 Arith( / , TM_DIV);
500 call_arith(L, top-2, TM_DIV);
501 else
502 nvalue(top-2) /= nvalue(top-1);
503 top--;
504 break; 434 break;
505 } 435 }
506 case OP_POW: { 436 case OP_POW: {
507 if (!call_binTM(L, top-2, top-1, top-2, TM_POW)) 437 call_arith(L, RB(i), RKC(i), RA(i), TM_POW);
508 luaD_error(L, l_s("undefined operation"));
509 top--;
510 break; 438 break;
511 } 439 }
512 case OP_CONCAT: { 440 case OP_UNM: {
513 int n = GETARG_U(i); 441 const TObject *rb = RB(i);
514 luaV_strconc(L, n, top); 442 StkId ra = RA(i);
515 top -= n-1; 443 if (ttype(rb) == LUA_TNUMBER || (rb=luaV_tonumber(rb, ra)) != NULL) {
516 luaC_checkGC(L); 444 setnvalue(ra, -nvalue(rb));
517 break; 445 }
518 } 446 else {
519 case OP_MINUS: { 447 TObject temp;
520 if (tonumber(top-1)) { 448 setnilvalue(&temp);
521 setnilvalue(top); 449 call_arith(L, RB(i), &temp, ra, TM_UNM);
522 call_arith(L, top-1, TM_UNM);
523 } 450 }
524 else
525 nvalue(top-1) = -nvalue(top-1);
526 break; 451 break;
527 } 452 }
528 case OP_NOT: { 453 case OP_NOT: {
529 ttype(top-1) = 454 if (ttype(RB(i)) == LUA_TNIL) {
530 (ttype(top-1) == LUA_TNIL) ? LUA_TNUMBER : LUA_TNIL; 455 setnvalue(RA(i), 1);
531 nvalue(top-1) = 1; 456 } else {
457 setnilvalue(RA(i));
458 }
532 break; 459 break;
533 } 460 }
534 case OP_JMPNE: { 461 case OP_CONCAT: {
535 top -= 2; 462 StkId top = RC(i)+1;
536 if (!luaO_equalObj(top, top+1)) dojump(pc, i); 463 StkId rb = RB(i);
464 luaV_strconc(L, top-rb, top);
465 setobj(RA(i), rb);
466 luaC_checkGC(L);
537 break; 467 break;
538 } 468 }
539 case OP_JMPEQ: { 469 case OP_CJMP:
540 top -= 2; 470 case OP_JMP: {
541 if (luaO_equalObj(top, top+1)) dojump(pc, i); 471 dojump(pc, i);
542 break; 472 break;
543 } 473 }
544 case OP_JMPLT: { 474 case OP_TESTEQ: {
545 top -= 2; 475 lua_assert(GET_OPCODE(*pc) == OP_CJMP);
546 if (luaV_lessthan(L, top, top+1)) dojump(pc, i); 476 if (luaO_equalObj(RB(i), RKC(i))) dojump(pc, *pc);
477 pc++;
547 break; 478 break;
548 } 479 }
549 case OP_JMPLE: { /* a <= b === !(b<a) */ 480 case OP_TESTNE: {
550 top -= 2; 481 lua_assert(GET_OPCODE(*pc) == OP_CJMP);
551 if (!luaV_lessthan(L, top+1, top)) dojump(pc, i); 482 if (!luaO_equalObj(RB(i), RKC(i))) dojump(pc, *pc);
483 pc++;
552 break; 484 break;
553 } 485 }
554 case OP_JMPGT: { /* a > b === (b<a) */ 486 case OP_TESTLT: {
555 top -= 2; 487 lua_assert(GET_OPCODE(*pc) == OP_CJMP);
556 if (luaV_lessthan(L, top+1, top)) dojump(pc, i); 488 if (luaV_lessthan(L, RB(i), RKC(i))) dojump(pc, *pc);
489 pc++;
557 break; 490 break;
558 } 491 }
559 case OP_JMPGE: { /* a >= b === !(a<b) */ 492 case OP_TESTLE: { /* b <= c === !(c<b) */
560 top -= 2; 493 lua_assert(GET_OPCODE(*pc) == OP_CJMP);
561 if (!luaV_lessthan(L, top, top+1)) dojump(pc, i); 494 if (!luaV_lessthan(L, RKC(i), RB(i))) dojump(pc, *pc);
495 pc++;
562 break; 496 break;
563 } 497 }
564 case OP_JMPT: { 498 case OP_TESTGT: { /* b > c === (c<b) */
565 if (ttype(--top) != LUA_TNIL) dojump(pc, i); 499 lua_assert(GET_OPCODE(*pc) == OP_CJMP);
500 if (luaV_lessthan(L, RKC(i), RB(i))) dojump(pc, *pc);
501 pc++;
566 break; 502 break;
567 } 503 }
568 case OP_JMPF: { 504 case OP_TESTGE: { /* b >= c === !(b<c) */
569 if (ttype(--top) == LUA_TNIL) dojump(pc, i); 505 lua_assert(GET_OPCODE(*pc) == OP_CJMP);
506 if (!luaV_lessthan(L, RB(i), RKC(i))) dojump(pc, *pc);
507 pc++;
570 break; 508 break;
571 } 509 }
572 case OP_JMPONT: { 510 case OP_TESTT: {
573 if (ttype(top-1) == LUA_TNIL) top--; 511 StkId rb = RB(i);
574 else dojump(pc, i); 512 lua_assert(GET_OPCODE(*pc) == OP_CJMP);
513 if (ttype(rb) != LUA_TNIL) {
514 int a = GETARG_A(i);
515 if (a != NO_REG) setobj(base+a, rb);
516 dojump(pc, *pc);
517 }
518 pc++;
575 break; 519 break;
576 } 520 }
577 case OP_JMPONF: { 521 case OP_TESTF: {
578 if (ttype(top-1) != LUA_TNIL) top--; 522 lua_assert(GET_OPCODE(*pc) == OP_CJMP);
579 else dojump(pc, i); 523 if (ttype(RB(i)) == LUA_TNIL) {
524 int a = GETARG_A(i);
525 if (a != NO_REG) setnilvalue(base+a);
526 dojump(pc, *pc);
527 }
528 pc++;
580 break; 529 break;
581 } 530 }
582 case OP_JMP: { 531 case OP_NILJMP: {
583 dojump(pc, i); 532 setnilvalue(RA(i));
533 pc++;
584 break; 534 break;
585 } 535 }
586 case OP_PUSHNILJMP: { 536 case OP_CALL: {
587 setnilvalue(top++); 537 int nres;
588 pc++; 538 int b = GETARG_B(i);
539 if (b != NO_REG)
540 L->top = base+b;
541 nres = GETARG_C(i);
542 if (nres == NO_REG) nres = LUA_MULTRET;
543 luaD_call(L, RA(i), nres);
544 if (nres != LUA_MULTRET) {
545 lua_assert(L->top == RA(i)+nres);
546 L->top = base+tf->maxstacksize;
547 }
589 break; 548 break;
590 } 549 }
550 case OP_RETURN: {
551 int b = GETARG_B(i);
552 if (b != NO_REG)
553 L->top = base+b;
554 return RA(i);
555 }
591 case OP_FORPREP: { 556 case OP_FORPREP: {
592 int jmp = GETARG_S(i); 557 int jmp = GETARG_sBc(i);
593 if (tonumber(top-1)) 558 StkId breg = RA(i);
594 luaD_error(L, l_s("`for' step must be a number")); 559 if (luaV_tonumber(breg, breg) == NULL)
595 if (tonumber(top-2))
596 luaD_error(L, l_s("`for' limit must be a number"));
597 if (tonumber(top-3))
598 luaD_error(L, l_s("`for' initial value must be a number")); 560 luaD_error(L, l_s("`for' initial value must be a number"));
561 if (luaV_tonumber(breg+1, breg+1) == NULL)
562 luaD_error(L, l_s("`for' limit must be a number"));
563 if (luaV_tonumber(breg+2, breg+2) == NULL)
564 luaD_error(L, l_s("`for' step must be a number"));
599 pc += -jmp; /* `jump' to loop end (delta is negated here) */ 565 pc += -jmp; /* `jump' to loop end (delta is negated here) */
600 goto forloop; /* do not increment index */ 566 nvalue(breg) -= nvalue(breg+2);/* decrement index (to be incremented) */
567 /* go through */
601 } 568 }
602 case OP_FORLOOP: { 569 case OP_FORLOOP: {
603 lua_assert(ttype(top-1) == LUA_TNUMBER); 570 StkId breg = RA(i);
604 lua_assert(ttype(top-2) == LUA_TNUMBER); 571 if (ttype(breg) != LUA_TNUMBER)
605 if (ttype(top-3) != LUA_TNUMBER)
606 luaD_error(L, l_s("`for' index must be a number")); 572 luaD_error(L, l_s("`for' index must be a number"));
607 nvalue(top-3) += nvalue(top-1); /* increment index */ 573 runtime_check(L, ttype(breg+1) == LUA_TNUMBER &&
608 forloop: 574 ttype(breg+2) == LUA_TNUMBER);
609 if (nvalue(top-1) > 0 ? 575 nvalue(breg) += nvalue(breg+2); /* increment index */
610 nvalue(top-3) > nvalue(top-2) : 576 if (nvalue(breg+2) > 0 ?
611 nvalue(top-3) < nvalue(top-2)) 577 nvalue(breg) <= nvalue(breg+1) :
612 top -= 3; /* end loop: remove control variables */ 578 nvalue(breg) >= nvalue(breg+1))
613 else
614 dojump(pc, i); /* repeat loop */ 579 dojump(pc, i); /* repeat loop */
615 break; 580 break;
616 } 581 }
617 case OP_LFORPREP: { 582 case OP_TFORPREP: {
618 int jmp = GETARG_S(i); 583 int jmp = GETARG_sBc(i);
619 if (ttype(top-1) != LUA_TTABLE) 584 StkId breg = RA(i);
585 if (ttype(breg) != LUA_TTABLE)
620 luaD_error(L, l_s("`for' table must be a table")); 586 luaD_error(L, l_s("`for' table must be a table"));
621 top += 3; /* index,key,value */ 587 setnvalue(breg+1, -1); /* initial index */
622 setnvalue(top-3, -1); /* initial index */ 588 setnilvalue(breg+2);
623 setnilvalue(top-2); 589 setnilvalue(breg+3);
624 setnilvalue(top-1);
625 pc += -jmp; /* `jump' to loop end (delta is negated here) */ 590 pc += -jmp; /* `jump' to loop end (delta is negated here) */
626 /* go through */ 591 /* go through */
627 } 592 }
628 case OP_LFORLOOP: { 593 case OP_TFORLOOP: {
629 Hash *t = hvalue(top-4); 594 StkId breg = RA(i);
630 int n = (int)nvalue(top-3); 595 Hash *t;
631 lua_assert(ttype(top-3) == LUA_TNUMBER); 596 int n;
632 lua_assert(ttype(top-4) == LUA_TTABLE); 597 runtime_check(L, ttype(breg) == LUA_TTABLE);
598 runtime_check(L, ttype(breg+1) == LUA_TNUMBER);
599 t = hvalue(breg);
600 n = (int)nvalue(breg+1);
633 n = luaH_nexti(t, n); 601 n = luaH_nexti(t, n);
634 if (n == -1) /* end loop? */ 602 if (n != -1) { /* repeat loop? */
635 top -= 4; /* remove table, index, key, and value */
636 else {
637 Node *node = node(t, n); 603 Node *node = node(t, n);
638 setnvalue(top-3, n); /* index */ 604 setnvalue(breg+1, n); /* index */
639 setkey2obj(top-2, node); 605 setkey2obj(breg+2, node);
640 setobj(top-1, val(node)); 606 setobj(breg+3, val(node));
641 dojump(pc, i); /* repeat loop */ 607 dojump(pc, i); /* repeat loop */
642 } 608 }
643 break; 609 break;
644 } 610 }
611 case OP_SETLIST:
612 case OP_SETLISTO: {
613 int bc;
614 int n;
615 Hash *h;
616 StkId ra = RA(i);
617 runtime_check(L, ttype(ra) == LUA_TTABLE);
618 h = hvalue(ra);
619 bc = GETARG_Bc(i);
620 if (GET_OPCODE(i) == OP_SETLIST)
621 n = (bc&(LFIELDS_PER_FLUSH-1)) + 1;
622 else
623 n = L->top - ra - 1;
624 bc &= ~(LFIELDS_PER_FLUSH-1); /* bc = bc - bc%FPF */
625 for (; n > 0; n--)
626 setobj(luaH_setnum(L, h, bc+n), ra+n);
627 break;
628 }
645 case OP_CLOSURE: { 629 case OP_CLOSURE: {
646 int nup = GETARG_B(i); 630 Proto *p = tf->kproto[GETARG_Bc(i)];
647 luaC_checkGC(L); 631 int nup = p->nupvalues;
648 L->top = top; 632 StkId ra = RA(i);
649 luaV_Lclosure(L, tf->kproto[GETARG_A(i)], nup); 633 L->top = ra+nup;
650 top -= (nup-1); 634 luaV_Lclosure(L, p, nup);
651 L->top = base+tf->maxstacksize; 635 L->top = base+tf->maxstacksize;
636 luaC_checkGC(L);
652 break; 637 break;
653 } 638 }
654 } 639 }
655 } 640 }
656} 641}
642
diff --git a/lvm.h b/lvm.h
index a8513c8a..cbd47be4 100644
--- a/lvm.h
+++ b/lvm.h
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lvm.h,v 1.28 2001/02/01 16:03:38 roberto Exp roberto $ 2** $Id: lvm.h,v 1.29 2001/02/07 18:13:49 roberto Exp roberto $
3** Lua virtual machine 3** Lua virtual machine
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -13,14 +13,13 @@
13#include "ltm.h" 13#include "ltm.h"
14 14
15 15
16#define tonumber(o) ((ttype(o) != LUA_TNUMBER) && (luaV_tonumber(o) != 0))
17#define tostring(L,o) ((ttype(o) != LUA_TSTRING) && (luaV_tostring(L, o) != 0)) 16#define tostring(L,o) ((ttype(o) != LUA_TSTRING) && (luaV_tostring(L, o) != 0))
18 17
19 18
20int luaV_tonumber (TObject *obj); 19const TObject *luaV_tonumber (const TObject *obj, TObject *n);
21int luaV_tostring (lua_State *L, TObject *obj); 20int luaV_tostring (lua_State *L, TObject *obj);
22void luaV_gettable (lua_State *L, StkId t, TObject *key, StkId res); 21void luaV_gettable (lua_State *L, StkId t, TObject *key, StkId res);
23void luaV_settable (lua_State *L, StkId t, StkId key, StkId val); 22void luaV_settable (lua_State *L, StkId t, TObject *key, StkId val);
24void luaV_getglobal (lua_State *L, TString *s, StkId res); 23void luaV_getglobal (lua_State *L, TString *s, StkId res);
25void luaV_setglobal (lua_State *L, TString *s, StkId val); 24void luaV_setglobal (lua_State *L, TString *s, StkId val);
26StkId luaV_execute (lua_State *L, const Closure *cl, StkId base); 25StkId luaV_execute (lua_State *L, const Closure *cl, StkId base);
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-03-16 14:05:48 +0000