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Implement clz/clo in x86 jit.

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Unknown W. Brackets 2013-07-04 18:01:17 -07:00
parent e27ab6fa11
commit 654490566f
1 changed files with 36 additions and 4 deletions
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40
Core/MIPS/x86/CompALU.cpp
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@ -172,11 +172,43 @@ namespace MIPSComp
switch (op & 63)
{
case 22: //clz
DISABLE;
break;
{
gpr.Lock(rd, rs);
gpr.BindToRegister(rd, rd == rs, true);
BSR(32, EAX, gpr.R(rs));
FixupBranch notFound = J_CC(CC_Z);
MOV(32, gpr.R(rd), Imm32(31));
SUB(32, gpr.R(rd), R(EAX));
FixupBranch skip = J();
SetJumpTarget(notFound);
MOV(32, gpr.R(rd), Imm32(32));
SetJumpTarget(skip);
gpr.UnlockAll();
break;
}
case 23: //clo
DISABLE;
break;
{
gpr.Lock(rd, rs);
gpr.BindToRegister(rd, rd == rs, true);
MOV(32, R(EAX), gpr.R(rs));
NOT(32, R(EAX));
BSR(32, EAX, R(EAX));
FixupBranch notFound = J_CC(CC_Z);
MOV(32, gpr.R(rd), Imm32(31));
SUB(32, gpr.R(rd), R(EAX));
FixupBranch skip = J();
SetJumpTarget(notFound);
MOV(32, gpr.R(rd), Imm32(32));
SetJumpTarget(skip);
gpr.UnlockAll();
break;
}
default:
DISABLE;
}