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Merge pull request #10051 from Pokechu22/dsp-jit-revert-acs-extension 

Revert "DSPJit: Sign-extend acS.h to 32 bits"
This commit is contained in:
Mai M 2021-08-24 08:33:32 -04:00 committed by GitHub
parent 757985d4c2 1abaff758a
commit 19f8e39929
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 22 additions and 3 deletions
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25
Source/Core/Core/DSP/Jit/x64/DSPJitRegCache.cpp
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@ -704,6 +704,23 @@ OpArg DSPJitRegCache::GetReg(int reg, bool load)
const OpArg oparg = m_regs[real_reg].loc; const OpArg oparg = m_regs[real_reg].loc;
m_regs[real_reg].used = true; m_regs[real_reg].used = true;
// do some register specific fixup
switch (reg)
{
case DSP_REG_ACC0_64:
case DSP_REG_ACC1_64:
if (load)
{
// need to do this because interpreter only does 48 bits
// (and PutReg does the same)
m_emitter.SHL(64, oparg, Imm8(64 - 40)); // sign extend
m_emitter.SAR(64, oparg, Imm8(64 - 40));
}
break;
default:
break;
}
return oparg; return oparg;
} }
@ -721,13 +738,15 @@ void DSPJitRegCache::PutReg(int reg, bool dirty)
case DSP_REG_ACH1: case DSP_REG_ACH1:
if (dirty) if (dirty)
{ {
// no need to extend to full 64bit here until interpreter
// uses that
if (oparg.IsSimpleReg()) if (oparg.IsSimpleReg())
{ {
// register is already shifted correctly // register is already shifted correctly
// (if at all) // (if at all)
// sign extend from the bottom 8 bits. // sign extend from the bottom 8 bits.
m_emitter.MOVSX(32, 8, oparg.GetSimpleReg(), oparg); m_emitter.MOVSX(16, 8, oparg.GetSimpleReg(), oparg);
} }
else if (oparg.IsImm()) else if (oparg.IsImm())
{ {
@ -740,8 +759,8 @@ void DSPJitRegCache::PutReg(int reg, bool dirty)
// of real_reg, since it has the right loc // of real_reg, since it has the right loc
X64Reg tmp = GetFreeXReg(); X64Reg tmp = GetFreeXReg();
// Sign extend from the bottom 8 bits. // Sign extend from the bottom 8 bits.
m_emitter.MOVSX(32, 8, tmp, m_regs[reg].loc); m_emitter.MOVSX(16, 8, tmp, m_regs[reg].loc);
m_emitter.MOV(32, m_regs[reg].loc, R(tmp)); m_emitter.MOV(16, m_regs[reg].loc, R(tmp));
PutXReg(tmp); PutXReg(tmp);
} }
} }