From 7178a5e34aa56c09a01a6664bb7a61c6771700d4 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Wed, 7 Feb 2001 16:13:49 -0200
Subject: new way to handle top x L->top
---
lapi.c | 10 +--
lcode.c | 39 ++++++-----
ldebug.c | 18 ++---
ldebug.h | 4 +-
ldo.c | 11 +---
ldo.h | 3 +-
lgc.c | 9 ++-
lvm.c | 227 ++++++++++++++++++++++++++++-----------------------------------
lvm.h | 12 ++--
9 files changed, 153 insertions(+), 180 deletions(-)
diff --git a/lapi.c b/lapi.c
index 387f7a21..e58fe789 100644
--- a/lapi.c
+++ b/lapi.c
@@ -1,5 +1,5 @@
/*
-** $Id: lapi.c,v 1.124 2001/02/01 16:03:38 roberto Exp roberto $
+** $Id: lapi.c,v 1.125 2001/02/02 15:13:05 roberto Exp roberto $
** Lua API
** See Copyright Notice in lua.h
*/
@@ -208,7 +208,7 @@ LUA_API int lua_lessthan (lua_State *L, int index1, int index2) {
o1 = luaA_indexAcceptable(L, index1);
o2 = luaA_indexAcceptable(L, index2);
i = (o1 == NULL || o2 == NULL) ? 0 /* index out-of-range */
- : luaV_lessthan(L, o1, o2, L->top);
+ : luaV_lessthan(L, o1, o2);
LUA_UNLOCK(L);
return i;
}
@@ -364,7 +364,7 @@ LUA_API void lua_gettable (lua_State *L, int index) {
StkId t;
LUA_LOCK(L);
t = Index(L, index);
- luaV_gettable(L, t, L->top, L->top-1);
+ luaV_gettable(L, t, L->top-1, L->top-1);
LUA_UNLOCK(L);
}
@@ -433,7 +433,7 @@ LUA_API void lua_newtable (lua_State *L) {
LUA_API void lua_setglobal (lua_State *L, const char *name) {
LUA_LOCK(L);
- luaV_setglobal(L, luaS_new(L, name), L->top);
+ luaV_setglobal(L, luaS_new(L, name), L->top - 1);
L->top--; /* remove element from the top */
LUA_UNLOCK(L);
}
@@ -443,7 +443,7 @@ LUA_API void lua_settable (lua_State *L, int index) {
StkId t;
LUA_LOCK(L);
t = Index(L, index);
- luaV_settable(L, t, L->top - 2, L->top);
+ luaV_settable(L, t, L->top - 2, L->top - 1);
L->top -= 2; /* pop index and value */
LUA_UNLOCK(L);
}
diff --git a/lcode.c b/lcode.c
index 8fb0f70c..321af3c9 100644
--- a/lcode.c
+++ b/lcode.c
@@ -1,5 +1,5 @@
/*
-** $Id: lcode.c,v 1.58 2001/01/29 13:14:49 roberto Exp roberto $
+** $Id: lcode.c,v 1.59 2001/01/29 15:26:40 roberto Exp roberto $
** Code generator for Lua
** See Copyright Notice in lua.h
*/
@@ -460,25 +460,26 @@ int luaK_code1 (FuncState *fs, OpCode o, int arg1) {
int luaK_code2 (FuncState *fs, OpCode o, int arg1, int arg2) {
Proto *f;
Instruction i = previous_instruction(fs);
- int delta = (int)luaK_opproperties[o].push - (int)luaK_opproperties[o].pop;
+ int push = (int)luaK_opproperties[o].push;
+ int pop = (int)luaK_opproperties[o].pop;
int optm = 0; /* 1 when there is an optimization */
switch (o) {
case OP_CLOSURE: {
- delta = -arg2+1;
+ pop = arg2;
break;
}
case OP_SETTABLE: {
- delta = -arg2;
+ pop = arg2;
break;
}
case OP_SETLIST: {
if (arg2 == 0) return NO_JUMP; /* nothing to do */
- delta = -arg2;
+ pop = arg2;
break;
}
case OP_SETMAP: {
if (arg1 == 0) return NO_JUMP; /* nothing to do */
- delta = -2*arg1;
+ pop = 2*arg1;
break;
}
case OP_RETURN: {
@@ -491,7 +492,7 @@ int luaK_code2 (FuncState *fs, OpCode o, int arg1, int arg2) {
}
case OP_PUSHNIL: {
if (arg1 == 0) return NO_JUMP; /* nothing to do */
- delta = arg1;
+ push = arg1;
switch(GET_OPCODE(i)) {
case OP_PUSHNIL: SETARG_U(i, GETARG_U(i)+arg1); optm = 1; break;
default: break;
@@ -500,7 +501,7 @@ int luaK_code2 (FuncState *fs, OpCode o, int arg1, int arg2) {
}
case OP_POP: {
if (arg1 == 0) return NO_JUMP; /* nothing to do */
- delta = -arg1;
+ pop = arg1;
switch(GET_OPCODE(i)) {
case OP_SETTABLE: SETARG_B(i, GETARG_B(i)+arg1); optm = 1; break;
default: break;
@@ -539,7 +540,7 @@ int luaK_code2 (FuncState *fs, OpCode o, int arg1, int arg2) {
break;
}
case OP_CONCAT: {
- delta = -arg1+1;
+ pop = arg1;
switch(GET_OPCODE(i)) {
case OP_CONCAT: /* `a..b..c' */
SETARG_U(i, GETARG_U(i)+1);
@@ -573,7 +574,7 @@ int luaK_code2 (FuncState *fs, OpCode o, int arg1, int arg2) {
case OP_JMPEQ: {
if (i == CREATE_U(OP_PUSHNIL, 1)) { /* `a==nil' */
i = CREATE_0(OP_NOT);
- delta = -1; /* just undo effect of previous PUSHNIL */
+ pop = 1; /* just undo effect of previous PUSHNIL */
optm = 1;
}
break;
@@ -637,12 +638,14 @@ int luaK_code2 (FuncState *fs, OpCode o, int arg1, int arg2) {
break;
}
default: {
- lua_assert(delta != VD);
break;
}
}
f = fs->f;
- luaK_deltastack(fs, delta);
+ lua_assert(push != VD);
+ lua_assert(pop != VD);
+ luaK_deltastack(fs, push);
+ luaK_deltastack(fs, -pop);
if (optm) { /* optimize: put instruction in place of last one */
f->code[fs->pc-1] = i; /* change previous instruction */
return fs->pc-1; /* do not generate new instruction */
@@ -668,7 +671,7 @@ const OpProperties luaK_opproperties[NUM_OPCODES] = {
{iAB, 0, 0}, /* OP_CALL */
{iAB, 0, 0}, /* OP_TAILCALL */
{iU, VD, 0}, /* OP_PUSHNIL */
- {iU, VD, 0}, /* OP_POP */
+ {iU, 0, VD}, /* OP_POP */
{iS, 1, 0}, /* OP_PUSHINT */
{iU, 1, 0}, /* OP_PUSHSTRING */
{iU, 1, 0}, /* OP_PUSHNUM */
@@ -683,16 +686,16 @@ const OpProperties luaK_opproperties[NUM_OPCODES] = {
{iU, 1, 0}, /* OP_CREATETABLE */
{iU, 0, 1}, /* OP_SETLOCAL */
{iU, 0, 1}, /* OP_SETGLOBAL */
- {iAB, VD, 0}, /* OP_SETTABLE */
- {iAB, VD, 0}, /* OP_SETLIST */
- {iU, VD, 0}, /* OP_SETMAP */
+ {iAB, 0, VD}, /* OP_SETTABLE */
+ {iAB, 0, VD}, /* OP_SETLIST */
+ {iU, 0, VD}, /* OP_SETMAP */
{iO, 1, 2}, /* OP_ADD */
{iS, 1, 1}, /* OP_ADDI */
{iO, 1, 2}, /* OP_SUB */
{iO, 1, 2}, /* OP_MULT */
{iO, 1, 2}, /* OP_DIV */
{iO, 1, 2}, /* OP_POW */
- {iU, VD, 0}, /* OP_CONCAT */
+ {iU, 1, VD}, /* OP_CONCAT */
{iO, 1, 1}, /* OP_MINUS */
{iO, 1, 1}, /* OP_NOT */
{iS, 0, 2}, /* OP_JMPNE */
@@ -711,6 +714,6 @@ const OpProperties luaK_opproperties[NUM_OPCODES] = {
{iS, 0, 3}, /* OP_FORLOOP */
{iS, 3, 0}, /* OP_LFORPREP */
{iS, 0, 4}, /* OP_LFORLOOP */
- {iAB, VD, 0} /* OP_CLOSURE */
+ {iAB, 1, VD} /* OP_CLOSURE */
};
diff --git a/ldebug.c b/ldebug.c
index 0cb93494..a54b293c 100644
--- a/ldebug.c
+++ b/ldebug.c
@@ -1,5 +1,5 @@
/*
-** $Id: ldebug.c,v 1.58 2001/01/29 17:16:58 roberto Exp roberto $
+** $Id: ldebug.c,v 1.59 2001/02/02 15:13:05 roberto Exp roberto $
** Debug Interface
** See Copyright Notice in lua.h
*/
@@ -397,10 +397,12 @@ static Instruction luaG_symbexec (const Proto *pt, int lastpc, int stackpos) {
}
default: {
OpCode op = GET_OPCODE(i);
- lua_assert(luaK_opproperties[op].push != VD);
- top -= (int)luaK_opproperties[op].pop;
- lua_assert(top >= 0);
- top = pushpc(stack, pc, top, luaK_opproperties[op].push);
+ int push = (int)luaK_opproperties[op].push;
+ int pop = (int)luaK_opproperties[op].pop;
+ lua_assert(push != VD && pop != VD);
+ lua_assert(0 <= top-pop && top+push <= pt->maxstacksize);
+ top -= pop;
+ top = pushpc(stack, pc, top, push);
}
}
}
@@ -482,9 +484,9 @@ void luaG_binerror (lua_State *L, StkId p1, int t, const char *op) {
}
-void luaG_ordererror (lua_State *L, StkId top) {
- const char *t1 = luaT_typename(G(L), top-2);
- const char *t2 = luaT_typename(G(L), top-1);
+void luaG_ordererror (lua_State *L, const TObject *p1, const TObject *p2) {
+ const char *t1 = luaT_typename(G(L), p1);
+ const char *t2 = luaT_typename(G(L), p2);
if (t1[2] == t2[2])
luaO_verror(L, "attempt to compare two %.10s values", t1);
else
diff --git a/ldebug.h b/ldebug.h
index dd217513..bab4d1d7 100644
--- a/ldebug.h
+++ b/ldebug.h
@@ -1,5 +1,5 @@
/*
-** $Id: ldebug.h,v 1.6 2000/10/02 20:10:55 roberto Exp roberto $
+** $Id: ldebug.h,v 1.7 2000/10/05 12:14:08 roberto Exp roberto $
** Auxiliary functions from Debug Interface module
** See Copyright Notice in lua.h
*/
@@ -15,7 +15,7 @@
void luaG_typeerror (lua_State *L, StkId o, const char *op);
void luaG_binerror (lua_State *L, StkId p1, int t, const char *op);
int luaG_getline (int *lineinfo, int pc, int refline, int *refi);
-void luaG_ordererror (lua_State *L, StkId top);
+void luaG_ordererror (lua_State *L, const TObject *p1, const TObject *p2);
#endif
diff --git a/ldo.c b/ldo.c
index 24f4a169..39ef5626 100644
--- a/ldo.c
+++ b/ldo.c
@@ -1,5 +1,5 @@
/*
-** $Id: ldo.c,v 1.121 2001/02/02 15:13:05 roberto Exp roberto $
+** $Id: ldo.c,v 1.122 2001/02/02 16:23:20 roberto Exp roberto $
** Stack and Call structure of Lua
** See Copyright Notice in lua.h
*/
@@ -143,14 +143,6 @@ static StkId callCclosure (lua_State *L, const struct Closure *cl, StkId base) {
}
-void luaD_callTM (lua_State *L, Closure *f, int nParams, int nResults) {
- StkId base = L->top - nParams;
- luaD_openstack(L, base);
- setclvalue(base, f);
- luaD_call(L, base, nResults);
-}
-
-
/*
** Call a function (C or Lua). The function to be called is at *func.
** The arguments are on the stack, right after the function.
@@ -182,6 +174,7 @@ void luaD_call (lua_State *L, StkId func, int nResults) {
if (callhook) /* same hook that was active at entry */
luaD_callHook(L, func, callhook, "return");
lua_assert(ttype(func) == LUA_TMARK);
+ setnilvalue(func); /* remove callinfo from the stack */
/* move results to `func' (to erase parameters and function) */
if (nResults == LUA_MULTRET) {
while (firstResult < L->top) /* copy all results */
diff --git a/ldo.h b/ldo.h
index 42497736..2cd9a91c 100644
--- a/ldo.h
+++ b/ldo.h
@@ -1,5 +1,5 @@
/*
-** $Id: ldo.h,v 1.28 2000/10/06 12:45:25 roberto Exp roberto $
+** $Id: ldo.h,v 1.29 2001/01/24 15:45:33 roberto Exp roberto $
** Stack and Call structure of Lua
** See Copyright Notice in lua.h
*/
@@ -23,7 +23,6 @@ void luaD_init (lua_State *L, int stacksize);
void luaD_adjusttop (lua_State *L, StkId base, int extra);
void luaD_lineHook (lua_State *L, StkId func, int line, lua_Hook linehook);
void luaD_call (lua_State *L, StkId func, int nResults);
-void luaD_callTM (lua_State *L, Closure *f, int nParams, int nResults);
void luaD_checkstack (lua_State *L, int n);
void luaD_error (lua_State *L, const char *s);
diff --git a/lgc.c b/lgc.c
index c8331b69..77927940 100644
--- a/lgc.c
+++ b/lgc.c
@@ -1,5 +1,5 @@
/*
-** $Id: lgc.c,v 1.86 2001/02/02 16:23:20 roberto Exp roberto $
+** $Id: lgc.c,v 1.87 2001/02/02 16:32:00 roberto Exp roberto $
** Garbage Collector
** See Copyright Notice in lua.h
*/
@@ -101,11 +101,14 @@ static void markobject (GCState *st, TObject *o) {
static void markstacks (lua_State *L, GCState *st) {
lua_State *L1 = L;
do { /* for each thread */
- StkId o;
+ StkId o, lim;
marktable(st, L1->gt); /* mark table of globals */
for (o=L1->stack; o<L1->top; o++)
markobject(st, o);
- lua_assert(L->previous->next == L && L->next->previous == L);
+ lim = (L1->stack_last - L1->top > MAXSTACK) ? L1->top+MAXSTACK
+ : L1->stack_last;
+ for (; o<=lim; o++) setnilvalue(o);
+ lua_assert(L1->previous->next == L1 && L1->next->previous == L1);
L1 = L1->next;
} while (L1 != L);
}
diff --git a/lvm.c b/lvm.c
index a25f02cd..55a9e433 100644
--- a/lvm.c
+++ b/lvm.c
@@ -1,10 +1,11 @@
/*
-** $Id: lvm.c,v 1.164 2001/02/02 15:13:05 roberto Exp roberto $
+** $Id: lvm.c,v 1.165 2001/02/06 16:01:29 roberto Exp roberto $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
+#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -26,14 +27,6 @@
-/*
-** Extra stack size to run a function:
-** TAG_LINE(1), NAME(1), TM calls(3) (plus some extra...)
-*/
-#define EXTRA_FSTACK 8
-
-
-
int luaV_tonumber (TObject *obj) {
if (ttype(obj) != LUA_TSTRING)
return 1;
@@ -58,7 +51,7 @@ int luaV_tostring (lua_State *L, TObject *obj) { /* LUA_NUMBER */
}
-static void traceexec (lua_State *L, StkId base, StkId top, lua_Hook linehook) {
+static void traceexec (lua_State *L, StkId base, lua_Hook linehook) {
CallInfo *ci = infovalue(base-1);
int *lineinfo = ci->func->f.l->lineinfo;
int pc = (*ci->pc - ci->func->f.l->code) - 1;
@@ -72,7 +65,6 @@ static void traceexec (lua_State *L, StkId base, StkId top, lua_Hook linehook) {
/* calls linehook when enters a new line or jumps back (loop) */
if (newline != ci->line || pc <= ci->lastpc) {
ci->line = newline;
- L->top = top;
luaD_lineHook(L, base-2, newline, linehook);
}
ci->lastpc = pc;
@@ -104,19 +96,52 @@ void luaV_Lclosure (lua_State *L, Proto *l, int nelems) {
}
+static void callTM (lua_State *L, const char *fmt, ...) {
+ va_list argp;
+ StkId base = L->top;
+ int has_result = 0;
+ va_start(argp, fmt);
+ for (;;) {
+ switch (*fmt++) {
+ case 'c':
+ setclvalue(L->top, va_arg(argp, Closure *));
+ break;
+ case 'o':
+ setobj(L->top, va_arg(argp, TObject *));
+ break;
+ case 's':
+ setsvalue(L->top, va_arg(argp, TString *));
+ break;
+ case 'r':
+ has_result = 1;
+ /* go through */
+ default:
+ goto endloop;
+ }
+ incr_top;
+ } endloop:
+ luaD_call(L, base, has_result);
+ if (has_result) {
+ L->top--;
+ setobj(va_arg(argp, TObject *), L->top);
+ }
+ va_end(argp);
+}
+
+
/*
** Function to index a table.
-** Receives the table at `t' and the key at the top (`top'-1),
+** Receives the table at `t' and the key at the `key'.
** leaves the result at `res'.
*/
-void luaV_gettable (lua_State *L, StkId t, StkId top, StkId res) {
+void luaV_gettable (lua_State *L, StkId t, TObject *key, StkId res) {
Closure *tm;
int tg;
if (ttype(t) == LUA_TTABLE && /* `t' is a table? */
((tg = hvalue(t)->htag) == LUA_TTABLE || /* with default tag? */
luaT_gettm(G(L), tg, TM_GETTABLE) == NULL)) { /* or no TM? */
/* do a primitive get */
- const TObject *h = luaH_get(hvalue(t), top-1);
+ const TObject *h = luaH_get(hvalue(t), key);
/* result is no nil or there is no `index' tag method? */
if (ttype(h) != LUA_TNIL || ((tm=luaT_gettm(G(L), tg, TM_INDEX)) == NULL)) {
setobj(res, h);
@@ -127,116 +152,79 @@ void luaV_gettable (lua_State *L, StkId t, StkId top, StkId res) {
else { /* try a `gettable' tag method */
tm = luaT_gettmbyObj(G(L), t, TM_GETTABLE);
}
- L->top = top;
if (tm == NULL) /* no tag method? */
luaG_typeerror(L, t, "index");
- else { /* call tag method */
- luaD_checkstack(L, 2);
- setobj(res+2, top-1); /* key */
- setobj(res+1, t); /* table */
- setclvalue(res, tm); /* tag method */
- L->top = res+3;
- luaD_call(L, res, 1);
- L->top = top; /* will be decremented by the callee */
- }
+ else
+ callTM(L, "coor", tm, t, key, res);
}
+
/*
-** Receives table at `t', key at `key' and value at top.
+** Receives table at `t', key at `key' and value at `val'.
*/
-void luaV_settable (lua_State *L, StkId t, StkId key, StkId top) {
+void luaV_settable (lua_State *L, StkId t, StkId key, StkId val) {
int tg;
if (ttype(t) == LUA_TTABLE && /* `t' is a table? */
((tg = hvalue(t)->htag) == LUA_TTABLE || /* with default tag? */
luaT_gettm(G(L), tg, TM_SETTABLE) == NULL)) { /* or no TM? */
- setobj(luaH_set(L, hvalue(t), key), top-1); /* do a primitive set */
+ setobj(luaH_set(L, hvalue(t), key), val); /* do a primitive set */
}
else { /* try a `settable' tag method */
Closure *tm = luaT_gettmbyObj(G(L), t, TM_SETTABLE);
- lua_assert(L->top == top);
if (tm == NULL) /* no tag method? */
luaG_typeerror(L, t, "index");
- else {
- luaD_checkstack(L, 3);
- setobj(top+2, top-1);
- setobj(top+1, key);
- setobj(top, t);
- setclvalue(top-1, tm);
- L->top = top+3;
- luaD_call(L, top-1, 0); /* call `settable' tag method */
- lua_assert(L->top == top-1);
- L->top = top; /* will be decremented by the callee */
- }
+ else
+ callTM(L, "cooo", tm, t, key, val);
}
}
-void luaV_getglobal (lua_State *L, TString *s, StkId top) {
- const TObject *value = luaH_getstr(L->gt, s);
+void luaV_getglobal (lua_State *L, TString *name, StkId res) {
+ const TObject *value = luaH_getstr(L->gt, name);
Closure *tm;
if (!HAS_TM_GETGLOBAL(L, ttype(value)) || /* is there a tag method? */
(tm = luaT_gettmbyObj(G(L), value, TM_GETGLOBAL)) == NULL) {
- setobj(top, value); /* default behavior */
- }
- else { /* call tag method */
- L->top = top;
- luaD_checkstack(L, 3);
- setclvalue(top, tm);
- setsvalue(top+1, s); /* global name */
- setobj(top+2, value);
- L->top = top+3;
- luaD_call(L, top, 1);
- lua_assert(L->top == top+1);
- L->top = top; /* will be incremented by the callee */
+ setobj(res, value); /* default behavior */
}
+ else
+ callTM(L, "csor", tm, name, value, res);
}
-void luaV_setglobal (lua_State *L, TString *s, StkId top) {
- TObject *oldvalue = luaH_setstr(L, L->gt, s);
+void luaV_setglobal (lua_State *L, TString *name, StkId val) {
+ TObject *oldvalue = luaH_setstr(L, L->gt, name);
Closure *tm;
if (!HAS_TM_SETGLOBAL(L, ttype(oldvalue)) || /* no tag methods? */
(tm = luaT_gettmbyObj(G(L), oldvalue, TM_SETGLOBAL)) == NULL) {
- setobj(oldvalue, top-1); /* raw set */
- }
- else { /* call tag method */
- lua_assert(L->top == top);
- luaD_checkstack(L, 3);
- setobj(top+2, top-1); /* new value */
- setobj(top+1, oldvalue); /* old value */
- setsvalue(top, s); /* var name */
- setclvalue(top-1, tm); /* tag method */
- L->top = top+3;
- luaD_call(L, top-1, 0);
- lua_assert(L->top == top-1);
- L->top = top; /* will be decremented by the callee */
+ setobj(oldvalue, val); /* raw set */
}
+ else
+ callTM(L, "csoo", tm, name, oldvalue, val);
}
-static int call_binTM (lua_State *L, StkId top, TMS event) {
- /* try first operand */
- Closure *tm = luaT_gettmbyObj(G(L), top-2, event);
- L->top = top;
+static int call_binTM (lua_State *L, const TObject *p1, const TObject *p2,
+ TObject *res, TMS event) {
+ TString *opname;
+ Closure *tm = luaT_gettmbyObj(G(L), p1, event); /* try first operand */
if (tm == NULL) {
- tm = luaT_gettmbyObj(G(L), top-1, event); /* try second operand */
+ tm = luaT_gettmbyObj(G(L), p2, event); /* try second operand */
if (tm == NULL) {
tm = luaT_gettm(G(L), 0, event); /* try a `global' method */
if (tm == NULL)
- return 0; /* error */
+ return 0; /* no tag method */
}
}
- setsvalue(L->top, luaS_new(L, luaT_eventname[event]));
- incr_top;
- luaD_callTM(L, tm, 3, 1);
+ opname = luaS_new(L, luaT_eventname[event]);
+ callTM(L, "coosr", tm, p1, p2, opname, res);
return 1;
}
-static void call_arith (lua_State *L, StkId top, TMS event) {
- if (!call_binTM(L, top, event))
- luaG_binerror(L, top-2, LUA_TNUMBER, "perform arithmetic on");
+static void call_arith (lua_State *L, StkId p1, TMS event) {
+ if (!call_binTM(L, p1, p1+1, p1, event))
+ luaG_binerror(L, p1, LUA_TNUMBER, "perform arithmetic on");
}
@@ -262,19 +250,14 @@ static int luaV_strlessthan (const TString *ls, const TString *rs) {
}
-int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r, StkId top) {
+int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r) {
if (ttype(l) == LUA_TNUMBER && ttype(r) == LUA_TNUMBER)
return (nvalue(l) < nvalue(r));
else if (ttype(l) == LUA_TSTRING && ttype(r) == LUA_TSTRING)
return luaV_strlessthan(tsvalue(l), tsvalue(r));
- else { /* call TM */
- L->top = top;
- luaD_checkstack(L, 2);
- setobj(top++, l);
- setobj(top++, r);
- if (!call_binTM(L, top, TM_LT))
- luaG_ordererror(L, top);
- L->top--;
+ else { /* try TM */
+ if (!call_binTM(L, l, r, L->top, TM_LT))
+ luaG_ordererror(L, l, r);
return (ttype(L->top) != LUA_TNIL);
}
}
@@ -284,7 +267,7 @@ void luaV_strconc (lua_State *L, int total, StkId top) {
do {
int n = 2; /* number of elements handled in this pass (at least 2) */
if (tostring(L, top-2) || tostring(L, top-1)) {
- if (!call_binTM(L, top, TM_CONCAT))
+ if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
luaG_binerror(L, top-2, LUA_TSTRING, "concat");
}
else if (tsvalue(top-1)->len > 0) { /* if len=0, do nothing */
@@ -350,17 +333,16 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
TString **const kstr = tf->kstr;
const lua_Hook linehook = L->linehook;
infovalue(base-1)->pc = &pc;
- luaD_checkstack(L, tf->maxstacksize+EXTRA_FSTACK);
if (tf->is_vararg) /* varargs? */
adjust_varargs(L, base, tf->numparams);
- else
- luaD_adjusttop(L, base, tf->numparams);
- top = L->top;
+ luaD_adjusttop(L, base, tf->maxstacksize);
+ top = base+tf->numparams+tf->is_vararg;
/* main loop of interpreter */
for (;;) {
const Instruction i = *pc++;
+ lua_assert(L->top == base+tf->maxstacksize);
if (linehook)
- traceexec(L, base, top, linehook);
+ traceexec(L, base, linehook);
switch (GET_OPCODE(i)) {
case OP_RETURN: {
L->top = top;
@@ -372,6 +354,7 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
L->top = top;
luaD_call(L, base+GETARG_A(i), nres);
top = L->top;
+ L->top = base+tf->maxstacksize;
break;
}
case OP_TAILCALL: {
@@ -425,31 +408,27 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
break;
}
case OP_GETTABLE: {
- luaV_gettable(L, top-2, top, top-2);
top--;
+ luaV_gettable(L, top-1, top, top-1);
break;
}
case OP_GETDOTTED: {
setsvalue(top, kstr[GETARG_U(i)]);
- luaV_gettable(L, top-1, top+1, top-1);
+ luaV_gettable(L, top-1, top, top-1);
break;
}
case OP_GETINDEXED: {
- setobj(top, base+GETARG_U(i));
- luaV_gettable(L, top-1, top+1, top-1);
+ luaV_gettable(L, top-1, base+GETARG_U(i), top-1);
break;
}
case OP_PUSHSELF: {
- TObject receiver;
- setobj(&receiver, top-1);
- setsvalue(top, kstr[GETARG_U(i)]);
+ setobj(top, top-1);
+ setsvalue(top+1, kstr[GETARG_U(i)]);
+ luaV_gettable(L, top-1, top+1, top-1);
top++;
- luaV_gettable(L, top-2, top, top-2);
- setobj(top-1, &receiver);
break;
}
case OP_CREATETABLE: {
- L->top = top;
luaC_checkGC(L);
sethvalue(top, luaH_new(L, GETARG_U(i)));
top++;
@@ -460,15 +439,13 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
break;
}
case OP_SETGLOBAL: {
- L->top = top; /* primitive set may generate an error */
- luaV_setglobal(L, kstr[GETARG_U(i)], top);
top--;
+ luaV_setglobal(L, kstr[GETARG_U(i)], top);
break;
}
case OP_SETTABLE: {
StkId t = top-GETARG_A(i);
- L->top = top; /* primitive set may generate an error */
- luaV_settable(L, t, t+1, top);
+ luaV_settable(L, t, t+1, top-1);
top -= GETARG_B(i); /* pop values */
break;
}
@@ -476,16 +453,13 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
int aux = GETARG_A(i) * LFIELDS_PER_FLUSH;
int n = GETARG_B(i);
Hash *arr = hvalue(top-n-1);
- L->top = top-n;
for (; n; n--)
setobj(luaH_setnum(L, arr, n+aux), --top);
break;
}
case OP_SETMAP: {
int n = GETARG_U(i);
- StkId finaltop = top-2*n;
- Hash *arr = hvalue(finaltop-1);
- L->top = finaltop;
+ Hash *arr = hvalue((top-2*n)-1);
for (; n; n--) {
top-=2;
setobj(luaH_set(L, arr, top), top+1);
@@ -494,7 +468,7 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
}
case OP_ADD: {
if (tonumber(top-2) || tonumber(top-1))
- call_arith(L, top, TM_ADD);
+ call_arith(L, top-2, TM_ADD);
else
nvalue(top-2) += nvalue(top-1);
top--;
@@ -503,7 +477,7 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
case OP_ADDI: {
if (tonumber(top-1)) {
setnvalue(top, (lua_Number)GETARG_S(i));
- call_arith(L, top+1, TM_ADD);
+ call_arith(L, top-1, TM_ADD);
}
else
nvalue(top-1) += (lua_Number)GETARG_S(i);
@@ -511,7 +485,7 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
}
case OP_SUB: {
if (tonumber(top-2) || tonumber(top-1))
- call_arith(L, top, TM_SUB);
+ call_arith(L, top-2, TM_SUB);
else
nvalue(top-2) -= nvalue(top-1);
top--;
@@ -519,7 +493,7 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
}
case OP_MULT: {
if (tonumber(top-2) || tonumber(top-1))
- call_arith(L, top, TM_MUL);
+ call_arith(L, top-2, TM_MUL);
else
nvalue(top-2) *= nvalue(top-1);
top--;
@@ -527,14 +501,14 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
}
case OP_DIV: {
if (tonumber(top-2) || tonumber(top-1))
- call_arith(L, top, TM_DIV);
+ call_arith(L, top-2, TM_DIV);
else
nvalue(top-2) /= nvalue(top-1);
top--;
break;
}
case OP_POW: {
- if (!call_binTM(L, top, TM_POW))
+ if (!call_binTM(L, top-2, top-1, top-2, TM_POW))
luaD_error(L, "undefined operation");
top--;
break;
@@ -543,14 +517,13 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
int n = GETARG_U(i);
luaV_strconc(L, n, top);
top -= n-1;
- L->top = top;
luaC_checkGC(L);
break;
}
case OP_MINUS: {
if (tonumber(top-1)) {
setnilvalue(top);
- call_arith(L, top+1, TM_UNM);
+ call_arith(L, top-1, TM_UNM);
}
else
nvalue(top-1) = -nvalue(top-1);
@@ -574,22 +547,22 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
}
case OP_JMPLT: {
top -= 2;
- if (luaV_lessthan(L, top, top+1, top+2)) dojump(pc, i);
+ if (luaV_lessthan(L, top, top+1)) dojump(pc, i);
break;
}
case OP_JMPLE: { /* a <= b === !(b<a) */
top -= 2;
- if (!luaV_lessthan(L, top+1, top, top+2)) dojump(pc, i);
+ if (!luaV_lessthan(L, top+1, top)) dojump(pc, i);
break;
}
case OP_JMPGT: { /* a > b === (b<a) */
top -= 2;
- if (luaV_lessthan(L, top+1, top, top+2)) dojump(pc, i);
+ if (luaV_lessthan(L, top+1, top)) dojump(pc, i);
break;
}
case OP_JMPGE: { /* a >= b === !(a<b) */
top -= 2;
- if (!luaV_lessthan(L, top, top+1, top+2)) dojump(pc, i);
+ if (!luaV_lessthan(L, top, top+1)) dojump(pc, i);
break;
}
case OP_JMPT: {
@@ -675,11 +648,11 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
}
case OP_CLOSURE: {
int nup = GETARG_B(i);
+ luaC_checkGC(L);
L->top = top;
luaV_Lclosure(L, tf->kproto[GETARG_A(i)], nup);
top -= (nup-1);
- lua_assert(top == L->top);
- luaC_checkGC(L);
+ L->top = base+tf->maxstacksize;
break;
}
}
diff --git a/lvm.h b/lvm.h
index ed862f2d..a8513c8a 100644
--- a/lvm.h
+++ b/lvm.h
@@ -1,5 +1,5 @@
/*
-** $Id: lvm.h,v 1.27 2000/10/05 12:14:08 roberto Exp roberto $
+** $Id: lvm.h,v 1.28 2001/02/01 16:03:38 roberto Exp roberto $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
@@ -19,14 +19,14 @@
int luaV_tonumber (TObject *obj);
int luaV_tostring (lua_State *L, TObject *obj);
-void luaV_gettable (lua_State *L, StkId t, StkId top, StkId res);
-void luaV_settable (lua_State *L, StkId t, StkId key, StkId top);
-void luaV_getglobal (lua_State *L, TString *s, StkId top);
-void luaV_setglobal (lua_State *L, TString *s, StkId top);
+void luaV_gettable (lua_State *L, StkId t, TObject *key, StkId res);
+void luaV_settable (lua_State *L, StkId t, StkId key, StkId val);
+void luaV_getglobal (lua_State *L, TString *s, StkId res);
+void luaV_setglobal (lua_State *L, TString *s, StkId val);
StkId luaV_execute (lua_State *L, const Closure *cl, StkId base);
void luaV_Cclosure (lua_State *L, lua_CFunction c, int nelems);
void luaV_Lclosure (lua_State *L, Proto *l, int nelems);
-int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r, StkId top);
+int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r);
void luaV_strconc (lua_State *L, int total, StkId top);
#endif
--
cgit v1.2.3-55-g6feb