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Retain NaN bits in fp16/fp32 conversions.

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This matches PSP behavior better.
This commit is contained in:
Unknown W. Brackets 2015-04-19 16:07:00 -07:00
parent 6c0bc5502b
commit bd6d9a97a5
1 changed files with 3 additions and 3 deletions
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6
math/math_util.h
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@ -151,8 +151,8 @@ inline FP32 half_to_float_fast5(FP16 h)
FP32 o;
o.u = (h.u & 0x7fff) << 13; // exponent/mantissa bits
o.f *= magic.f; // exponent adjust
if (o.f >= was_infnan.f) // make sure Inf/NaN survive
o.u |= 255 << 23;
if (o.f >= was_infnan.f) // make sure Inf/NaN survive (retain the low bits)
o.u = (255 << 23) | (h.u & 0x03ff);
o.u |= (h.u & 0x8000) << 16; // sign bit
return o;
}
@ -178,7 +178,7 @@ inline FP16 float_to_half_fast3(FP32 f)
f.u ^= sign;
if (f.u >= f32infty.u) // Inf or NaN (all exponent bits set)
o.u = (f.u > f32infty.u) ? 0x7e00 : 0x7c00; // NaN->qNaN and Inf->Inf
o.u = (f.u > f32infty.u) ? (0x7e00 | (f.u & 0x3ff)) : 0x7c00; // NaN->qNaN and Inf->Inf
else // (De)normalized number or zero
{
f.u &= round_mask;