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CPU/Recompiler/AArch32: Reduce register usage of Mul

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Stenzek 2023-10-19 21:40:16 +10:00
parent 23dff0a9b6
commit cce1ec598c
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1 changed files with 9 additions and 6 deletions
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15
src/core/cpu_recompiler_code_generator_aarch32.cpp
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@ -665,20 +665,23 @@ void CodeGenerator::EmitCmp(HostReg to_reg, const Value& value)
void CodeGenerator::EmitMul(HostReg to_reg_hi, HostReg to_reg_lo, const Value& lhs, const Value& rhs, void CodeGenerator::EmitMul(HostReg to_reg_hi, HostReg to_reg_lo, const Value& lhs, const Value& rhs,
bool signed_multiply) bool signed_multiply)
{ {
Value lhs_in_reg = GetValueInHostRegister(lhs); // We could use GetValueInHostRegister() here, but we run out of registers...
Value rhs_in_reg = GetValueInHostRegister(rhs); // Value lhs_in_reg = GetValueInHostRegister(lhs);
// Value rhs_in_reg = GetValueInHostRegister(rhs);
const HostReg lhs_in_reg = lhs.IsInHostRegister() ? lhs.GetHostRegister() : (EmitCopyValue(RARG1, lhs), RARG1);
const HostReg rhs_in_reg = rhs.IsInHostRegister() ? rhs.GetHostRegister() : (EmitCopyValue(RARG2, rhs), RARG2);
if (lhs.size < RegSize_64) if (lhs.size < RegSize_64)
{ {
if (signed_multiply) if (signed_multiply)
{ {
m_emit->smull(GetHostReg32(to_reg_lo), GetHostReg32(to_reg_hi), GetHostReg32(lhs_in_reg.host_reg), m_emit->smull(GetHostReg32(to_reg_lo), GetHostReg32(to_reg_hi), GetHostReg32(lhs_in_reg),
GetHostReg32(rhs_in_reg.host_reg)); GetHostReg32(rhs_in_reg));
} }
else else
{ {
m_emit->umull(GetHostReg32(to_reg_lo), GetHostReg32(to_reg_hi), GetHostReg32(lhs_in_reg.host_reg), m_emit->umull(GetHostReg32(to_reg_lo), GetHostReg32(to_reg_hi), GetHostReg32(lhs_in_reg),
GetHostReg32(rhs_in_reg.host_reg)); GetHostReg32(rhs_in_reg));
} }
} }
else else