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rlwimix optimizations

This commit is contained in:
calc84maniac 2012-01-02 15:07:36 -05:00
parent a2bd91b726
commit 7d262ff1f4
1 changed files with 66 additions and 12 deletions
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72
Source/Core/Core/Src/PowerPC/Jit64/Jit_Integer.cpp
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@ -1476,26 +1476,80 @@ void Jit64::rlwimix(UGeckoInstruction inst)
{
u32 mask = Helper_Mask(inst.MB,inst.ME);
gpr.SetImmediate32(a, ((u32)gpr.R(a).offset & ~mask) | (_rotl((u32)gpr.R(s).offset,inst.SH) & mask));
if (inst.Rc)
{
ComputeRC(gpr.R(a));
}
}
else
{
gpr.Lock(a, s);
gpr.KillImmediate(a, true, true);
gpr.BindToRegister(a, true, true);
u32 mask = Helper_Mask(inst.MB, inst.ME);
MOV(32, R(EAX), gpr.R(s));
AND(32, gpr.R(a), Imm32(~mask));
if (inst.SH)
ROL(32, R(EAX), Imm8(inst.SH));
AND(32, R(EAX), Imm32(mask));
OR(32, gpr.R(a), R(EAX));
gpr.UnlockAll();
if (mask == 0 || (a == s && inst.SH == 0))
{
if (inst.RC)
{
ComputeRC(gpr.R(a));
}
}
else if (mask == 0xFFFFFFFF)
{
if (a != s)
{
MOV(32, gpr.R(a), gpr.R(s));
}
if (inst.SH)
{
ROL(32, gpr.R(a), Imm8(inst.SH));
}
if (inst.Rc)
{
ComputeRC(gpr.R(a));
}
}
else if (inst.SH)
{
if (mask == -(1 << inst.SH))
{
MOV(32, R(EAX), gpr.R(s));
SHL(32, R(EAX), Imm8(inst.SH));
AND(32, gpr.R(a), Imm32(~mask));
OR(32, gpr.R(a), R(EAX));
}
else if (mask == (1 << inst.SH) - 1)
{
MOV(32, R(EAX), gpr.R(s));
SHR(32, R(EAX), Imm8(32-inst.SH));
AND(32, gpr.R(a), Imm32(~mask));
OR(32, gpr.R(a), R(EAX));
}
else
{
MOV(32, R(EAX), gpr.R(s));
ROL(32, R(EAX), Imm8(inst.SH));
XOR(32, R(EAX), gpr.R(a));
AND(32, R(EAX), Imm32(mask));
XOR(32, gpr.R(a), R(EAX));
}
if (inst.Rc)
{
GenerateRC();
}
}
else
{
XOR(32, gpr.R(a), gpr.R(s));
AND(32, gpr.R(a), Imm32(~mask));
XOR(32, gpr.R(a), gpr.R(s));
if (inst.Rc)
{
GenerateRC();
}
}
gpr.UnlockAll();
}
}
void Jit64::rlwnmx(UGeckoInstruction inst)
{