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Rename VM's jump instructions for better readability.
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This commit is contained in:
Rafal Kupiec
2019-04-16 08:14:16 +02:00
förälder eb80dced3e
incheckning 89f19133d5
3 ändrade filer med 22 tillägg och 22 borttagningar
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24
engine/compiler.c
Visa fil

@@ -1688,9 +1688,9 @@ static sxi32 PH7_CompileWhile(ph7_gen_state *pGen) {
pGen->pIn = &pEnd[1];
pGen->pEnd = pTmp;
/* Emit the false jump */
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JZ, 0, 0, 0, &nFalseJump);
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JMPZ, 0, 0, 0, &nFalseJump);
/* Save the instruction index so we can fix it later when the jump destination is resolved */
PH7_GenStateNewJumpFixup(pWhileBlock, PH7_OP_JZ, nFalseJump);
PH7_GenStateNewJumpFixup(pWhileBlock, PH7_OP_JMPZ, nFalseJump);
/* Compile the loop body */
rc = PH7_CompileBlock(&(*pGen));
if(rc == SXERR_ABORT) {
@@ -1820,7 +1820,7 @@ static sxi32 PH7_CompileDoWhile(ph7_gen_state *pGen) {
pGen->pIn = &pEnd[1];
pGen->pEnd = pTmp;
/* Emit the true jump to the beginning of the loop */
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JNZ, 0, pDoBlock->nFirstInstr, 0, 0);
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JMPNZ, 0, pDoBlock->nFirstInstr, 0, 0);
/* Fix all jumps now the destination is resolved */
PH7_GenStateFixJumps(pDoBlock, -1, PH7_VmInstrLength(pGen->pVm));
/* Release the loop block */
@@ -1933,9 +1933,9 @@ static sxi32 PH7_CompileFor(ph7_gen_state *pGen) {
return SXERR_ABORT;
} else if(rc != SXERR_EMPTY) {
/* Emit the false jump */
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JZ, 0, 0, 0, &nFalseJump);
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JMPZ, 0, 0, 0, &nFalseJump);
/* Save the instruction index so we can fix it later when the jump destination is resolved */
PH7_GenStateNewJumpFixup(pForBlock, PH7_OP_JZ, nFalseJump);
PH7_GenStateNewJumpFixup(pForBlock, PH7_OP_JMPZ, nFalseJump);
}
if((pGen->pIn->nType & PH7_TK_SEMI) == 0) {
/* Syntax error */
@@ -2327,9 +2327,9 @@ static sxi32 PH7_CompileIf(ph7_gen_state *pGen) {
return SXERR_ABORT;
}
/* Emit the false jump */
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JZ, 0, 0, 0, &nJumpIdx);
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JMPZ, 0, 0, 0, &nJumpIdx);
/* Save the instruction index so we can fix it later when the jump destination is resolved */
PH7_GenStateNewJumpFixup(pCondBlock, PH7_OP_JZ, nJumpIdx);
PH7_GenStateNewJumpFixup(pCondBlock, PH7_OP_JMPZ, nJumpIdx);
/* Compile the body */
rc = PH7_CompileBlock(&(*pGen));
if(rc == SXERR_ABORT) {
@@ -2359,10 +2359,10 @@ static sxi32 PH7_CompileIf(ph7_gen_state *pGen) {
/* Synchronize cursors */
pToken = pGen->pIn;
/* Fix the false jump */
PH7_GenStateFixJumps(pCondBlock, PH7_OP_JZ, PH7_VmInstrLength(pGen->pVm));
PH7_GenStateFixJumps(pCondBlock, PH7_OP_JMPZ, PH7_VmInstrLength(pGen->pVm));
} /* For(;;) */
/* Fix the false jump */
PH7_GenStateFixJumps(pCondBlock, PH7_OP_JZ, PH7_VmInstrLength(pGen->pVm));
PH7_GenStateFixJumps(pCondBlock, PH7_OP_JMPZ, PH7_VmInstrLength(pGen->pVm));
if(pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_KEYWORD) &&
(SX_PTR_TO_INT(pGen->pIn->pUserData) & PH7_KEYWORD_ELSE)) {
/* Compile the else block */
@@ -4922,7 +4922,7 @@ static sxi32 PH7_GenStateEmitExprCode(
}
nJz = nJmp = 0; /* cc -O6 warning */
/* Phase#2: Emit the false jump */
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JZ, 0, 0, 0, &nJz);
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JMPZ, 0, 0, 0, &nJz);
if(pNode->pLeft) {
/* Phase#3: Compile the 'then' expression */
rc = PH7_GenStateEmitExprCode(&(*pGen), pNode->pLeft, iFlags);
@@ -5018,10 +5018,10 @@ static sxi32 PH7_GenStateEmitExprCode(
if(pNode->pRight) {
if(iVmOp == PH7_OP_LAND) {
/* Emit the false jump so we can short-circuit the logical and */
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JZ, 1/* Keep the value on the stack */, 0, 0, &nJmpIdx);
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JMPZ, 1/* Keep the value on the stack */, 0, 0, &nJmpIdx);
} else if(iVmOp == PH7_OP_LOR) {
/* Emit the true jump so we can short-circuit the logical or*/
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JNZ, 1/* Keep the value on the stack */, 0, 0, &nJmpIdx);
PH7_VmEmitInstr(pGen->pVm, 0, PH7_OP_JMPNZ, 1/* Keep the value on the stack */, 0, 0, &nJmpIdx);
} else if(pNode->pOp->iPrec == 18 /* Combined binary operators [i.e: =,'.=','+=',*=' ...] precedence */) {
iFlags |= EXPR_FLAG_LOAD_IDX_STORE;
}

16
engine/vm.c
Visa fil

@@ -2135,12 +2135,12 @@ static sxi32 VmByteCodeExec(
pc = pInstr->iP2 - 1;
break;
/*
* JZ: P1 P2 *
* JMPZ: P1 P2 *
*
* Take the jump if the top value is zero (FALSE jump).Pop the top most
* entry in the stack if P1 is zero.
*/
case PH7_OP_JZ:
case PH7_OP_JMPZ:
#ifdef UNTRUST
if(pTos < pStack) {
goto Abort;
@@ -2159,12 +2159,12 @@ static sxi32 VmByteCodeExec(
}
break;
/*
* JNZ: P1 P2 *
* JMPNZ: P1 P2 *
*
* Take the jump if the top value is not zero (TRUE jump).Pop the top most
* entry in the stack if P1 is zero.
*/
case PH7_OP_JNZ:
case PH7_OP_JMPNZ:
#ifdef UNTRUST
if(pTos < pStack) {
goto Abort;
@@ -5399,11 +5399,11 @@ static const char *VmInstrToString(sxi32 nOp) {
case PH7_OP_JMP:
zOp = "JMP";
break;
case PH7_OP_JZ:
zOp = "JZ";
case PH7_OP_JMPZ:
zOp = "JMPZ";
break;
case PH7_OP_JNZ:
zOp = "JNZ";
case PH7_OP_JMPNZ:
zOp = "JMPNZ";
break;
case PH7_OP_POP:
zOp = "POP";

4
include/ph7int.h
Visa fil

@@ -1397,8 +1397,8 @@ enum ph7_vm_op {
PH7_OP_LOAD_CLOSURE, /* Load closure */
PH7_OP_NOOP, /* NOOP */
PH7_OP_JMP, /* Unconditional jump */
PH7_OP_JZ, /* Jump on zero (FALSE jump) */
PH7_OP_JNZ, /* Jump on non-zero (TRUE jump) */
PH7_OP_JMPZ, /* Jump on zero (FALSE jump) */
PH7_OP_JMPNZ, /* Jump on non-zero (TRUE jump) */
PH7_OP_POP, /* Stack POP */
PH7_OP_CVT_INT, /* Integer cast */
PH7_OP_CVT_STR, /* String cast */