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include/fpu/softfloat: implement float16_chs helper

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Backports commit 5f10aef521427b3909c24a0c7a82839b43f876e2 from qemu
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Alex Bennée 2018-03-08 10:01:01 -05:00 committed by Lioncash
parent facbc9ef66
commit 380699fa35
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1 changed files with 8 additions and 0 deletions
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8
qemu/include/fpu/softfloat.h
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@ -260,6 +260,14 @@ static inline float16 float16_abs(float16 a)
return make_float16(float16_val(a) & 0x7fff); return make_float16(float16_val(a) & 0x7fff);
} }
static inline float16 float16_chs(float16 a)
{
/* Note that chs does *not* handle NaN specially, nor does
* it flush denormal inputs to zero.
*/
return make_float16(float16_val(a) ^ 0x8000);
}
/*---------------------------------------------------------------------------- /*----------------------------------------------------------------------------
| The pattern for a default generated half-precision NaN. | The pattern for a default generated half-precision NaN.
*----------------------------------------------------------------------------*/ *----------------------------------------------------------------------------*/