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CPU/Recompiler: Tiny optimization for div on x64

This commit is contained in:
Connor McLaughlin 2021-03-19 18:06:25 +10:00
parent 7d634ca278
commit 8b7e2b525e
1 changed files with 9 additions and 0 deletions
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9
src/core/cpu_recompiler_code_generator_x64.cpp
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@ -785,6 +785,15 @@ void CodeGenerator::EmitDiv(HostReg to_reg_quotient, HostReg to_reg_remainder, H
// what we want, but swapped, so exchange them
m_emit->xchg(m_emit->rax, m_emit->rdx);
}
else if (to_reg_quotient != Xbyak::Operand::RAX && to_reg_quotient != Xbyak::Operand::RDX &&
to_reg_remainder != Xbyak::Operand::RAX && to_reg_remainder != Xbyak::Operand::RDX)
{
// store to the registers we want.. this could be optimized better
if (to_reg_quotient != HostReg_Count)
m_emit->mov(GetHostReg64(to_reg_quotient), m_emit->rax);
if (to_reg_remainder != HostReg_Count)
m_emit->mov(GetHostReg64(to_reg_remainder), m_emit->rdx);
}
else
{
// store to the registers we want.. this could be optimized better