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Optimize and/or 0 to just a mov in x86 jit.

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Unknown W. Brackets 2013-01-25 00:25:40 -08:00
parent ab9bea068c
commit a7c6f46829
1 changed files with 34 additions and 25 deletions
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59
Core/MIPS/x86/CompALU.cpp
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@ -141,31 +141,6 @@ namespace MIPSComp
}
}
//rd = rs X rt
void Jit::CompTriArith(u32 op, void (XEmitter::*arith)(int, const OpArg &, const OpArg &), u32 (*doImm)(const u32, const u32))
{
int rt = _RT;
int rs = _RS;
int rd = _RD;
// Yes, this happens. Let's make it fast.
if (doImm && gpr.IsImmediate(rs) && gpr.IsImmediate(rt))
{
gpr.SetImmediate32(rd, doImm(gpr.GetImmediate32(rs), gpr.GetImmediate32(rt)));
return;
}
gpr.Lock(rt, rs, rd);
// Use EAX as a temporary if we'd overwrite it.
if (rd == rt)
MOV(32, R(EAX), gpr.R(rt));
gpr.BindToRegister(rd, rs == rd, true);
if (rs != rd)
MOV(32, gpr.R(rd), gpr.R(rs));
(this->*arith)(32, gpr.R(rd), rd == rt ? R(EAX) : gpr.R(rt));
gpr.UnlockAll();
}
static u32 RType3_ImmAdd(const u32 a, const u32 b)
{
return a + b;
@ -191,6 +166,40 @@ namespace MIPSComp
return a ^ b;
}
//rd = rs X rt
void Jit::CompTriArith(u32 op, void (XEmitter::*arith)(int, const OpArg &, const OpArg &), u32 (*doImm)(const u32, const u32))
{
int rt = _RT;
int rs = _RS;
int rd = _RD;
// Yes, this happens. Let's make it fast.
if (doImm && gpr.IsImmediate(rs) && gpr.IsImmediate(rt))
{
gpr.SetImmediate32(rd, doImm(gpr.GetImmediate32(rs), gpr.GetImmediate32(rt)));
return;
}
gpr.Lock(rt, rs, rd);
// Optimize out + 0 and | 0.
if ((doImm == &RType3_ImmAdd || doImm == &RType3_ImmOr) && (rs == 0 || rt == 0))
{
gpr.BindToRegister(rd, rd == rs || rd == rt, true);
MOV(32, gpr.R(rd), gpr.R(rt == 0 ? rs : rt));
}
else
{
// Use EAX as a temporary if we'd overwrite it.
if (rd == rt)
MOV(32, R(EAX), gpr.R(rt));
gpr.BindToRegister(rd, rs == rd, true);
if (rs != rd)
MOV(32, gpr.R(rd), gpr.R(rs));
(this->*arith)(32, gpr.R(rd), rd == rt ? R(EAX) : gpr.R(rt));
}
gpr.UnlockAll();
}
void Jit::Comp_RType3(u32 op)
{
CONDITIONAL_DISABLE