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https://github.com/lua/lua
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81a8845e4f
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45
lcode.c
45
lcode.c
@ -1,5 +1,5 @@
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/*
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** $Id: lcode.c,v 1.109 2002/08/05 14:07:34 roberto Exp roberto $
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** $Id: lcode.c,v 1.110 2002/08/20 20:03:05 roberto Exp roberto $
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** Code generator for Lua
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** See Copyright Notice in lua.h
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*/
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@ -616,38 +616,21 @@ void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
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static void codebinop (FuncState *fs, expdesc *res, BinOpr op,
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int o1, int o2) {
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switch (op) {
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case OPR_SUB:
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case OPR_DIV:
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case OPR_POW:
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case OPR_ADD:
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case OPR_MULT: { /* ORDER OPR */
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OpCode opc = cast(OpCode, (op - OPR_ADD) + OP_ADD);
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res->info = luaK_codeABC(fs, opc, 0, o1, o2);
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res->k = VRELOCABLE;
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break;
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}
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case OPR_NE:
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case OPR_EQ: {
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res->info = luaK_condjump(fs, OP_EQ, (op == OPR_EQ), o1, o2);
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res->k = VJMP;
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break;
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}
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case OPR_GT:
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case OPR_GE: { /* ORDER OPR */
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int temp;
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if (op <= OPR_POW) { /* arithmetic operator? */
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OpCode opc = cast(OpCode, (op - OPR_ADD) + OP_ADD); /* ORDER OP */
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res->info = luaK_codeABC(fs, opc, 0, o1, o2);
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res->k = VRELOCABLE;
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}
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else { /* test operator */
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static const OpCode ops[] = {OP_EQ, OP_EQ, OP_LT, OP_LE, OP_LT, OP_LE};
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int cond = 1;
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if (op >= OPR_GT) { /* `>' or `>='? */
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int temp; /* exchange args and replace by `<' or `<=' */
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temp = o1; o1 = o2; o2 = temp; /* o1 <==> o2 */
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op -= 2; /* GT -> LT, GE -> LE */
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/* go through */
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}
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case OPR_LT:
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case OPR_LE: {
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OpCode opc = cast(OpCode, (op - OPR_LT) + OP_LT);
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res->info = luaK_condjump(fs, opc, 1, o1, o2);
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res->k = VJMP;
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break;
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}
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default: lua_assert(0);
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else if (op == OPR_NE) cond = 0;
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res->info = luaK_condjump(fs, ops[op - OPR_NE], cond, o1, o2);
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res->k = VJMP;
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}
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}
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@ -1,5 +1,5 @@
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/*
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** $Id: lopcodes.h,v 1.100 2002/08/05 14:46:43 roberto Exp roberto $
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** $Id: lopcodes.h,v 1.101 2002/08/20 20:03:05 roberto Exp roberto $
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** Opcodes for Lua virtual machine
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** See Copyright Notice in lua.h
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*/
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@ -123,6 +123,11 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */
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** RK(x) == if x < MAXSTACK then R(x) else Kst(x-MAXSTACK)
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*/
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/*
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** grep "ORDER OP" if you change these enums
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*/
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typedef enum {
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/*----------------------------------------------------------------------
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name args description
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4
lvm.c
4
lvm.c
@ -1,5 +1,5 @@
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/*
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** $Id: lvm.c,v 1.252 2002/08/12 17:23:12 roberto Exp roberto $
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** $Id: lvm.c,v 1.253 2002/08/20 20:03:05 roberto Exp roberto $
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** Lua virtual machine
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** See Copyright Notice in lua.h
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*/
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@ -555,7 +555,7 @@ StkId luaV_execute (lua_State *L) {
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dojump(pc, GETARG_sBx(i));
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break;
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}
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case OP_EQ: { /* skip next instruction if test fails */
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case OP_EQ: {
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if (equalobj(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
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else dojump(pc, GETARG_sBx(*pc) + 1);
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break;
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