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Fixed int8 imul issue

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This commit is contained in:
Brian Fiete 2020-05-13 17:08:08 -07:00
parent 299918d641
commit 71aea8107f
1 changed files with 13 additions and 2 deletions
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13
IDEHelper/Backend/BeMCContext.cpp
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@ -3622,7 +3622,7 @@ BeMCOperand BeMCContext::AllocVirtualReg(BeType* type, int refCount, bool mustBe
if (mDebugging) if (mDebugging)
{ {
if (mcOperand.mVRegIdx == 3) if (mcOperand.mVRegIdx == 15)
{ {
NOP; NOP;
} }
@ -9332,11 +9332,22 @@ bool BeMCContext::DoLegalization()
{ {
BF_ASSERT(inst->mResult); BF_ASSERT(inst->mResult);
auto srcVRegInfo = GetVRegInfo(inst->mArg0);
// Int8 multiplies can only be done on AL // Int8 multiplies can only be done on AL
AllocInst(BeMCInstKind_PreserveVolatiles, BeMCOperand::FromReg(X64Reg_RAX), instIdx++); AllocInst(BeMCInstKind_PreserveVolatiles, BeMCOperand::FromReg(X64Reg_RAX), instIdx++);
auto vregInfo0 = GetVRegInfo(inst->mArg0);
if (vregInfo0 != NULL)
vregInfo0->mDisableRAX = true;
auto vregInfo1 = GetVRegInfo(inst->mArg1);
if (vregInfo1 != NULL)
vregInfo1->mDisableRAX = true;
AllocInst(BeMCInstKind_Mov, BeMCOperand::FromReg(X64Reg_AH), inst->mArg1, instIdx++);
AllocInst(BeMCInstKind_Mov, BeMCOperand::FromReg(X64Reg_AL), inst->mArg0, instIdx++); AllocInst(BeMCInstKind_Mov, BeMCOperand::FromReg(X64Reg_AL), inst->mArg0, instIdx++);
AllocInst(BeMCInstKind_Mov, inst->mResult, BeMCOperand::FromReg(X64Reg_AL), instIdx++ + 1); AllocInst(BeMCInstKind_Mov, inst->mResult, BeMCOperand::FromReg(X64Reg_AL), instIdx++ + 1);
inst->mArg0 = BeMCOperand::FromReg(X64Reg_AL); inst->mArg0 = BeMCOperand::FromReg(X64Reg_AL);
inst->mArg1 = BeMCOperand::FromReg(X64Reg_AH);
inst->mResult = BeMCOperand(); inst->mResult = BeMCOperand();
AllocInst(BeMCInstKind_RestoreVolatiles, BeMCOperand::FromReg(X64Reg_RAX), instIdx++ + 1); AllocInst(BeMCInstKind_RestoreVolatiles, BeMCOperand::FromReg(X64Reg_RAX), instIdx++ + 1);