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Implement SMMLA, SMMLS, SMMUL

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Tillmann Karras
2016-08-06 12:10:43 +01:00
parent 846d07d7b5
commit 55204a80d0
2 changed files with 60 additions and 4 deletions
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44
src/frontend/translate/translate_arm/multiply.cpp
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@@ -171,15 +171,53 @@ bool ArmTranslatorVisitor::arm_SMULWy(Cond cond, Reg d, Reg m, bool M, Reg n) {
// Multiply (Most significant word) instructions
bool ArmTranslatorVisitor::arm_SMMLA(Cond cond, Reg d, Reg a, Reg m, bool R, Reg n) {
return InterpretThisInstruction();
if (d == Reg::PC || n == Reg::PC || m == Reg::PC /* no check for a */)
return UnpredictableInstruction();
if (ConditionPassed(cond)) {
auto n64 = ir.SignExtendWordToLong(ir.GetRegister(n));
auto m64 = ir.SignExtendWordToLong(ir.GetRegister(m));
auto a64 = ir.Pack2x32To1x64(ir.Imm32(0), ir.GetRegister(a));
auto temp = ir.Add64(a64, ir.Mul64(n64, m64));
auto result_carry = ir.MostSignificantWord(temp);
auto result = result_carry.result;
if (R)
result = ir.AddWithCarry(result, ir.Imm32(0), result_carry.carry).result;
ir.SetRegister(d, result);
}
return true;
}
bool ArmTranslatorVisitor::arm_SMMLS(Cond cond, Reg d, Reg a, Reg m, bool R, Reg n) {
return InterpretThisInstruction();
if (d == Reg::PC || n == Reg::PC || m == Reg::PC || a == Reg::PC)
return UnpredictableInstruction();
if (ConditionPassed(cond)) {
auto n64 = ir.SignExtendWordToLong(ir.GetRegister(n));
auto m64 = ir.SignExtendWordToLong(ir.GetRegister(m));
auto a64 = ir.Pack2x32To1x64(ir.Imm32(0), ir.GetRegister(a));
auto temp = ir.Sub64(a64, ir.Mul64(n64, m64));
auto result_carry = ir.MostSignificantWord(temp);
auto result = result_carry.result;
if (R)
result = ir.AddWithCarry(result, ir.Imm32(0), result_carry.carry).result;
ir.SetRegister(d, result);
}
return true;
}
bool ArmTranslatorVisitor::arm_SMMUL(Cond cond, Reg d, Reg m, bool R, Reg n) {
return InterpretThisInstruction();
if (d == Reg::PC || n == Reg::PC || m == Reg::PC)
return UnpredictableInstruction();
if (ConditionPassed(cond)) {
auto n64 = ir.SignExtendWordToLong(ir.GetRegister(n));
auto m64 = ir.SignExtendWordToLong(ir.GetRegister(m));
auto product = ir.Mul64(n64, m64);
auto result_carry = ir.MostSignificantWord(product);
auto result = result_carry.result;
if (R)
result = ir.AddWithCarry(result, ir.Imm32(0), result_carry.carry).result;
ir.SetRegister(d, result);
}
return true;
}