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Fixed X64 div emission, proper arg1 register disabling for mul

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This commit is contained in:
Brian Fiete 2022-01-12 06:31:16 -05:00
parent 0e9f135d7e
commit c43673d454
1 changed files with 28 additions and 28 deletions
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56
IDEHelper/Backend/BeMCContext.cpp
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@ -10135,13 +10135,9 @@ bool BeMCContext::DoLegalization()
// Int8 multiplies can only be done on AL
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;
DisableRegister(inst->mArg0, X64Reg_RAX);
DisableRegister(inst->mArg1, X64Reg_RAX);
AllocInst(BeMCInstKind_Mov, BeMCOperand::FromReg(X64Reg_AH), inst->mArg1, instIdx++);
AllocInst(BeMCInstKind_Mov, BeMCOperand::FromReg(X64Reg_AL), inst->mArg0, instIdx++);
AllocInst(BeMCInstKind_Mov, inst->mResult ? inst->mResult : inst->mArg0, BeMCOperand::FromReg(X64Reg_AL), instIdx++ + 1);
@ -10174,21 +10170,10 @@ bool BeMCContext::DoLegalization()
// unsigned multiplies can only be done on AX/EAX/RAX
AllocInst(BeMCInstKind_PreserveVolatiles, BeMCOperand::FromReg(X64Reg_RAX), instIdx++);
AllocInst(BeMCInstKind_PreserveVolatiles, BeMCOperand::FromReg(X64Reg_RDX), instIdx++);
auto vregInfo0 = GetVRegInfo(inst->mArg0);
if (vregInfo0 != NULL)
{
vregInfo0->mDisableRAX = true;
vregInfo0->mDisableRDX = true;
}
auto vregInfo1 = GetVRegInfo(inst->mArg1);
if (vregInfo1 != NULL)
{
vregInfo1->mDisableRAX = true;
vregInfo1->mDisableRDX = true;
}
DisableRegister(inst->mArg0, X64Reg_RAX);
DisableRegister(inst->mArg0, X64Reg_RDX);
DisableRegister(inst->mArg1, X64Reg_RAX);
DisableRegister(inst->mArg1, X64Reg_RDX);
AllocInst(BeMCInstKind_Mov, BeMCOperand::FromReg(wantReg0), inst->mArg0, instIdx++);
AllocInst(BeMCInstKind_Mov, inst->mResult ? inst->mResult : inst->mArg0, BeMCOperand::FromReg(wantReg0), instIdx++ + 1);
inst->mArg0 = BeMCOperand::FromReg(wantReg0);
@ -10208,6 +10193,22 @@ bool BeMCContext::DoLegalization()
BF_ASSERT(!inst->mResult);
handled = true;
}
if (inst->mArg0.IsNativeReg())
{
auto vregInfo1 = GetVRegInfo(inst->mArg1);
if (vregInfo1 != NULL)
{
auto arg1 = GetFixedOperand(inst->mArg1);
if ((arg1.IsNativeReg()) && (inst->mArg0.mReg == arg1.mReg) &&
((ResizeRegister(arg1.mReg, 8) == X64Reg_RAX) || (ResizeRegister(arg1.mReg, 8) == X64Reg_RDX)))
{
DisableRegister(inst->mArg1, X64Reg_RAX);
DisableRegister(inst->mArg1, X64Reg_RDX);
isFinalRun = false;
}
}
}
if (!handled)
{
@ -14656,7 +14657,7 @@ void BeMCContext::DoCodeEmission()
BF_ASSERT((inst->mArg0.IsNativeReg()) && (inst->mArg0.mReg == X64Reg_AL));
// XOR ah, ah
Emit(0x30); Emit(0xE4);
// IDIV rm
// DIV rm
EmitREX(BeMCOperand::FromReg(X64Reg_AX), inst->mArg1, false);
Emit(0xF6); EmitModRM(0x6, inst->mArg1);
break;
@ -14664,7 +14665,7 @@ void BeMCContext::DoCodeEmission()
BF_ASSERT((inst->mArg0.IsNativeReg()) && (inst->mArg0.mReg == X64Reg_AX));
// XOR dx, dx
Emit(0x66); Emit(0x31); Emit(0xD2);
// IDIV rm
// DIV rm
Emit(0x66);
EmitREX(BeMCOperand::FromReg(X64Reg_AX), inst->mArg1, false);
Emit(0xF7); EmitModRM(0x6, inst->mArg1);
@ -14673,7 +14674,7 @@ void BeMCContext::DoCodeEmission()
BF_ASSERT((inst->mArg0.IsNativeReg()) && (inst->mArg0.mReg == X64Reg_EAX));
// XOR edx, edx
Emit(0x31); Emit(0xD2);
// IDIV rm
// DIV rm
EmitREX(BeMCOperand::FromReg(X64Reg_EAX), inst->mArg1, false);
Emit(0xF7); EmitModRM(0x6, inst->mArg1);
break;
@ -14681,8 +14682,7 @@ void BeMCContext::DoCodeEmission()
BF_ASSERT((inst->mArg0.IsNativeReg()) && (inst->mArg0.mReg == X64Reg_RAX));
// XOR rdx, rdx
Emit(0x48); Emit(0x31); Emit(0xD2);
EmitREX(BeMCOperand::FromReg(X64Reg_RAX), inst->mArg1, true);
// IDIV rm
// DIV rm
EmitREX(BeMCOperand::FromReg(X64Reg_RAX), inst->mArg1, true);
Emit(0xF7); EmitModRM(0x6, inst->mArg1);
break;
@ -16056,7 +16056,7 @@ void BeMCContext::Generate(BeFunction* function)
mDbgPreferredRegs[32] = X64Reg_R8;*/
//mDbgPreferredRegs[8] = X64Reg_RAX;
//mDebugging = (function->mName == "?InitThread@Foo@BeefTest@bf@@CA?AU?$Result@X@System@3@H@Z");
//mDebugging = (function->mName == "?InitDecHexDigits@NumberFormatter@System@bf@@AEAAX_K@Z");
// || (function->mName == "?MethodA@TestProgram@BeefTest@bf@@CAXXZ");
// || (function->mName == "?Hey@Blurg@bf@@SAXXZ")
// ;