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Emulated vslb.

This commit is contained in:
Ben Vanik 2013-10-14 18:33:17 -07:00
parent 1eba1fb5c2
commit 929ea13548
1 changed files with 29 additions and 1 deletions
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30
src/xenia/cpu/x64/x64_emit_altivec.cc
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@ -1552,6 +1552,15 @@ XEEMITTER(vsl, 0x100001C4, VX )(X64Emitter& e, X86Compiler& c, Instr
return 1;
}
// TODO(benvanik): implement for real - this is in the memcpy path.
static __m128i __emulated_vslb(__m128i va, __m128i vb) {
__m128i result;
for (int n = 0; n < 16; n++) {
int sh = vb.m128i_u8[n] & 0x7;
result.m128i_u8[n] = va.m128i_u8[n] << sh;
}
return result;
}
XEEMITTER(vslb, 0x10000104, VX )(X64Emitter& e, X86Compiler& c, InstrData& i) {
XEINSTRNOTIMPLEMENTED();
// o = {0}
@ -1559,7 +1568,26 @@ XEEMITTER(vslb, 0x10000104, VX )(X64Emitter& e, X86Compiler& c, Instr
// t = shift input by VB[b] *bits*
// o = o | (t & mask)
// write o
return 1;
XmmVar tva(c.newXmmVar());
c.movaps(tva, e.vr_value(i.VX.VA));
c.save(tva);
XmmVar tvb(c.newXmmVar());
c.movaps(tvb, e.vr_value(i.VX.VB));
c.save(tvb);
GpVar pva(c.newGpVar());
c.lea(pva, tva.m128());
GpVar pvb(c.newGpVar());
c.lea(pvb, tvb.m128());
XmmVar v(c.newXmmVar());
X86CompilerFuncCall* call = c.call(__emulated_vslb);
uint32_t args[] = {kX86VarTypeGpq, kX86VarTypeGpq};
call->setPrototype(kX86FuncConvDefault, kX86VarTypeGpq, args, XECOUNT(args));
call->setArgument(0, pva);
call->setArgument(1, pvb);
call->setReturn(v);
e.update_vr_value(i.VX.VD, v);
e.TraceVR(i.VX.VD, i.VX.VA, i.VX.VB);
return 0;
}
XEEMITTER(vslh, 0x10000144, VX )(X64Emitter& e, X86Compiler& c, InstrData& i) {