From 0267168675cb21f19e685749e1737dfd2884bdf2 Mon Sep 17 00:00:00 2001 From: Roberto Ierusalimschy Date: Fri, 8 Jun 2001 09:29:27 -0300 Subject: details. --- lvm.c | 103 ++++++++++++++++++++++++++++++------------------------------------ 1 file changed, 46 insertions(+), 57 deletions(-) (limited to 'lvm.c') diff --git a/lvm.c b/lvm.c index 728f128e..29a6ea4d 100644 --- a/lvm.c +++ b/lvm.c @@ -1,5 +1,5 @@ /* -** $Id: lvm.c,v 1.179 2001/06/05 18:17:01 roberto Exp roberto $ +** $Id: lvm.c,v 1.180 2001/06/05 19:27:32 roberto Exp roberto $ ** Lua virtual machine ** See Copyright Notice in lua.h */ @@ -346,9 +346,9 @@ static void adjust_varargs (lua_State *L, StkId base, int nfixargs) { TObject tempb, tempc; \ if ((ttype(b) == LUA_TNUMBER || (b = luaV_tonumber(b, &tempb)) != NULL) && \ (ttype(c) == LUA_TNUMBER || (c = luaV_tonumber(c, &tempc)) != NULL)) { \ - setnvalue(RA(i), nvalue(b) op nvalue(c)); \ + setnvalue(ra, nvalue(b) op nvalue(c)); \ } else \ - call_arith(L, RB(i), RKC(i), RA(i), optm); \ + call_arith(L, RB(i), RKC(i), ra, optm); \ } @@ -375,59 +375,57 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) { /* main loop of interpreter */ for (;;) { const Instruction i = *pc++; + const StkId ra = RA(i); if (linehook) traceexec(L, linehook); switch (GET_OPCODE(i)) { case OP_MOVE: { - setobj(RA(i), RB(i)); + setobj(ra, RB(i)); break; } case OP_LOADK: { - setobj(RA(i), KBc(i)); + setobj(ra, KBc(i)); break; } case OP_LOADINT: { - setnvalue(RA(i), (lua_Number)GETARG_sBc(i)); + setnvalue(ra, (lua_Number)GETARG_sBc(i)); break; } case OP_LOADUPVAL: { - setobj(RA(i), cl->upvalue+GETARG_Bc(i)); + setobj(ra, cl->upvalue+GETARG_Bc(i)); break; } case OP_LOADNIL: { - TObject *ra = RA(i); TObject *rb = RB(i); do { - setnilvalue(ra++); - } while (ra <= rb); + setnilvalue(rb--); + } while (rb >= ra); break; } case OP_GETGLOBAL: { lua_assert(ttype(KBc(i)) == LUA_TSTRING); - luaV_getglobal(L, tsvalue(KBc(i)), RA(i)); + luaV_getglobal(L, tsvalue(KBc(i)), ra); break; } case OP_GETTABLE: { - luaV_gettable(L, RB(i), RKC(i), RA(i)); + luaV_gettable(L, RB(i), RKC(i), ra); break; } case OP_SETGLOBAL: { lua_assert(ttype(KBc(i)) == LUA_TSTRING); - luaV_setglobal(L, tsvalue(KBc(i)), RA(i)); + luaV_setglobal(L, tsvalue(KBc(i)), ra); break; } case OP_SETTABLE: { - luaV_settable(L, RB(i), RKC(i), RA(i)); + luaV_settable(L, RB(i), RKC(i), ra); break; } case OP_NEWTABLE: { - StkId ra = RA(i); sethvalue(ra, luaH_new(L, GETARG_Bc(i))); luaV_checkGC(L, ra+1); break; } case OP_SELF: { - StkId ra = RA(i); StkId rb = RB(i); setobj(ra+1, rb); luaV_gettable(L, rb, RKC(i), ra); @@ -450,12 +448,11 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) { break; } case OP_POW: { - call_arith(L, RB(i), RKC(i), RA(i), TM_POW); + call_arith(L, RB(i), RKC(i), ra, TM_POW); break; } case OP_UNM: { const TObject *rb = RB(i); - StkId ra = RA(i); if (ttype(rb) == LUA_TNUMBER || (rb=luaV_tonumber(rb, ra)) != NULL) { setnvalue(ra, -nvalue(rb)); } @@ -468,9 +465,9 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) { } case OP_NOT: { if (ttype(RB(i)) == LUA_TNIL) { - setnvalue(RA(i), 1); + setnvalue(ra, 1); } else { - setnilvalue(RA(i)); + setnilvalue(ra); } break; } @@ -478,7 +475,7 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) { StkId top = RC(i)+1; StkId rb = RB(i); luaV_strconc(L, top-rb, top); - setobj(RA(i), rb); + setobj(ra, rb); break; } case OP_CJMP: @@ -526,8 +523,7 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) { StkId rb = RB(i); lua_assert(GET_OPCODE(*pc) == OP_CJMP); if (ttype(rb) != LUA_TNIL) { - int a = GETARG_A(i); - if (a != NO_REG) setobj(base+a, rb); + setobj(ra, rb); dojump(pc, *pc); } pc++; @@ -536,15 +532,14 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) { case OP_TESTF: { lua_assert(GET_OPCODE(*pc) == OP_CJMP); if (ttype(RB(i)) == LUA_TNIL) { - int a = GETARG_A(i); - if (a != NO_REG) setnilvalue(base+a); + setnilvalue(ra); dojump(pc, *pc); } pc++; break; } case OP_NILJMP: { - setnilvalue(RA(i)); + setnilvalue(ra); pc++; break; } @@ -555,9 +550,9 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) { L->top = base+b; nres = GETARG_C(i); if (nres == NO_REG) nres = LUA_MULTRET; - luaD_call(L, RA(i), nres); + luaD_call(L, ra, nres); if (nres != LUA_MULTRET) { - lua_assert(L->top == RA(i)+nres); + lua_assert(L->top == ra+nres); L->top = base+tf->maxstacksize; } break; @@ -566,59 +561,55 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) { int b = GETARG_B(i); if (b != NO_REG) L->top = base+b; - return RA(i); + return ra; } case OP_FORPREP: { int jmp = GETARG_sBc(i); - StkId breg = RA(i); - if (luaV_tonumber(breg, breg) == NULL) + if (luaV_tonumber(ra, ra) == NULL) luaD_error(L, l_s("`for' initial value must be a number")); - if (luaV_tonumber(breg+1, breg+1) == NULL) + if (luaV_tonumber(ra+1, ra+1) == NULL) luaD_error(L, l_s("`for' limit must be a number")); - if (luaV_tonumber(breg+2, breg+2) == NULL) + if (luaV_tonumber(ra+2, ra+2) == NULL) luaD_error(L, l_s("`for' step must be a number")); pc += -jmp; /* `jump' to loop end (delta is negated here) */ - nvalue(breg) -= nvalue(breg+2);/* decrement index (to be incremented) */ + nvalue(ra) -= nvalue(ra+2);/* decrement index (to be incremented) */ /* go through */ } case OP_FORLOOP: { - StkId breg = RA(i); - if (ttype(breg) != LUA_TNUMBER) + if (ttype(ra) != LUA_TNUMBER) luaD_error(L, l_s("`for' index must be a number")); - runtime_check(L, ttype(breg+1) == LUA_TNUMBER && - ttype(breg+2) == LUA_TNUMBER); - nvalue(breg) += nvalue(breg+2); /* increment index */ - if (nvalue(breg+2) > 0 ? - nvalue(breg) <= nvalue(breg+1) : - nvalue(breg) >= nvalue(breg+1)) + runtime_check(L, ttype(ra+1) == LUA_TNUMBER && + ttype(ra+2) == LUA_TNUMBER); + nvalue(ra) += nvalue(ra+2); /* increment index */ + if (nvalue(ra+2) > 0 ? + nvalue(ra) <= nvalue(ra+1) : + nvalue(ra) >= nvalue(ra+1)) dojump(pc, i); /* repeat loop */ break; } case OP_TFORPREP: { int jmp = GETARG_sBc(i); - StkId breg = RA(i); - if (ttype(breg) != LUA_TTABLE) + if (ttype(ra) != LUA_TTABLE) luaD_error(L, l_s("`for' table must be a table")); - setnvalue(breg+1, -1); /* initial index */ - setnilvalue(breg+2); - setnilvalue(breg+3); + setnvalue(ra+1, -1); /* initial index */ + setnilvalue(ra+2); + setnilvalue(ra+3); pc += -jmp; /* `jump' to loop end (delta is negated here) */ /* go through */ } case OP_TFORLOOP: { - StkId breg = RA(i); Hash *t; int n; - runtime_check(L, ttype(breg) == LUA_TTABLE); - runtime_check(L, ttype(breg+1) == LUA_TNUMBER); - t = hvalue(breg); - n = (int)nvalue(breg+1); + runtime_check(L, ttype(ra) == LUA_TTABLE); + runtime_check(L, ttype(ra+1) == LUA_TNUMBER); + t = hvalue(ra); + n = (int)nvalue(ra+1); n = luaH_nexti(t, n); if (n != -1) { /* repeat loop? */ Node *node = node(t, n); - setnvalue(breg+1, n); /* index */ - setkey2obj(breg+2, node); - setobj(breg+3, val(node)); + setnvalue(ra+1, n); /* index */ + setkey2obj(ra+2, node); + setobj(ra+3, val(node)); dojump(pc, i); /* repeat loop */ } break; @@ -628,7 +619,6 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) { int bc; int n; Hash *h; - StkId ra = RA(i); runtime_check(L, ttype(ra) == LUA_TTABLE); h = hvalue(ra); bc = GETARG_Bc(i); @@ -644,7 +634,6 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) { case OP_CLOSURE: { Proto *p = tf->kproto[GETARG_Bc(i)]; int nup = p->nupvalues; - StkId ra = RA(i); luaV_checkGC(L, ra+nup); L->top = ra+nup; luaV_Lclosure(L, p, nup); -- cgit v1.2.3-55-g6feb