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[JIT] Properly mask NaNs in vctsxs

This commit is contained in:
DrChat 2018-03-03 13:56:30 -06:00
parent a9d2a50082
commit 1c1fdb4ccd
1 changed files with 12 additions and 9 deletions
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21
src/xenia/cpu/backend/x64/x64_sequences.cc
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@ -1634,18 +1634,21 @@ struct VECTOR_CONVERT_F2I
// saturate values > UINT_MAX // saturate values > UINT_MAX
e.vpor(i.dest, i.dest, e.xmm0); e.vpor(i.dest, i.dest, e.xmm0);
} else { } else {
Xmm src1 = e.xmm2; // xmm2 = NaN mask
e.vmovdqa(src1, i.src1); // Duplicate src1. e.vcmpunordps(e.xmm2, i.src1, i.src1);
e.vcvttps2dq(i.dest, i.src1); // convert packed floats to packed dwords
e.vcvttps2dq(e.xmm0, i.src1);
// if dest is indeterminate and i.src1 >= 0 (i.e. !(i.src1 & 0x80000000)) // (high bit) xmm1 = dest is indeterminate and i.src1 >= 0
// i.dest = 0x7FFFFFFF e.vpcmpeqd(e.xmm1, e.xmm0, e.GetXmmConstPtr(XMMIntMin));
e.vpcmpeqd(e.xmm0, i.dest, e.GetXmmConstPtr(XMMIntMin)); e.vpandn(e.xmm1, i.src1, e.xmm1);
e.vpandn(e.xmm0, src1, e.xmm0);
// (high bit of xmm0 = is ind. && i.src1 >= 0) // saturate positive values
e.vblendvps(i.dest, i.dest, e.GetXmmConstPtr(XMMIntMax), e.xmm0); e.vblendvps(i.dest, e.xmm0, e.GetXmmConstPtr(XMMIntMax), e.xmm1);
// mask NaNs
e.vpandn(i.dest, e.xmm2, i.dest);
} }
} }
}; };