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Jit_Integer: srawix

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This commit is contained in:
MerryMage
2018-10-15 21:01:15 +01:00
parent 817fddf734
commit 31bd9b5cd0
1 changed files with 17 additions and 15 deletions
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32
Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
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@ -1865,49 +1865,51 @@ void Jit64::srawix(UGeckoInstruction inst)
if (amount != 0) if (amount != 0)
{ {
gpr.Lock(a, s); RCX64Reg Ra = gpr.Bind(a, RCMode::Write);
gpr.BindToRegister(a, a == s, true); RCOpArg Rs = gpr.Use(s, RCMode::Read);
RegCache::Realize(Ra, Rs);
if (!js.op->wantsCA) if (!js.op->wantsCA)
{ {
if (a != s) if (a != s)
MOV(32, gpr.R(a), gpr.R(s)); MOV(32, Ra, Rs);
SAR(32, gpr.R(a), Imm8(amount)); SAR(32, Ra, Imm8(amount));
} }
else else
{ {
MOV(32, R(RSCRATCH), gpr.R(s)); MOV(32, R(RSCRATCH), Rs);
if (a != s) if (a != s)
MOV(32, gpr.R(a), R(RSCRATCH)); MOV(32, Ra, R(RSCRATCH));
// some optimized common cases that can be done in slightly fewer ops // some optimized common cases that can be done in slightly fewer ops
if (amount == 1) if (amount == 1)
{ {
SHR(32, R(RSCRATCH), Imm8(31)); // sign SHR(32, R(RSCRATCH), Imm8(31)); // sign
AND(32, R(RSCRATCH), gpr.R(a)); // (sign && carry) AND(32, R(RSCRATCH), Ra); // (sign && carry)
SAR(32, gpr.R(a), Imm8(1)); SAR(32, Ra, Imm8(1));
MOV(8, PPCSTATE(xer_ca), MOV(8, PPCSTATE(xer_ca),
R(RSCRATCH)); // XER.CA = sign && carry, aka (input&0x80000001) == 0x80000001 R(RSCRATCH)); // XER.CA = sign && carry, aka (input&0x80000001) == 0x80000001
} }
else else
{ {
SAR(32, gpr.R(a), Imm8(amount)); SAR(32, Ra, Imm8(amount));
SHL(32, R(RSCRATCH), Imm8(32 - amount)); SHL(32, R(RSCRATCH), Imm8(32 - amount));
TEST(32, R(RSCRATCH), gpr.R(a)); TEST(32, R(RSCRATCH), Ra);
FinalizeCarry(CC_NZ); FinalizeCarry(CC_NZ);
} }
} }
} }
else else
{ {
gpr.Lock(a, s);
FinalizeCarry(false); FinalizeCarry(false);
gpr.BindToRegister(a, a == s, true); RCX64Reg Ra = gpr.Bind(a, RCMode::Write);
RCOpArg Rs = gpr.Use(s, RCMode::Read);
RegCache::Realize(Ra, Rs);
if (a != s) if (a != s)
MOV(32, gpr.R(a), gpr.R(s)); MOV(32, Ra, Rs);
} }
if (inst.Rc) if (inst.Rc)
ComputeRC(gpr.R(a)); ComputeRC(a);
gpr.UnlockAll();
} }
// count leading zeroes // count leading zeroes