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softfloat: Define misc operations for bfloat16

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Backports 5ebf5f4be66c378fd5f3dee85f54dd4942171d57
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LIU Zhiwei 2021-02-27 16:39:52 -05:00 • committed by Lioncash
parent d8168a8142
commit d26cd63ad6
18 changed files with 118 additions and 0 deletions
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48
qemu/include/fpu/softfloat.h
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@ -426,9 +426,57 @@ bfloat16 bfloat16_sqrt(bfloat16, float_status *status);
FloatRelation bfloat16_compare(bfloat16, bfloat16, float_status *status);
FloatRelation bfloat16_compare_quiet(bfloat16, bfloat16, float_status *status);
bool bfloat16_is_quiet_nan(bfloat16, float_status *status);
bool bfloat16_is_signaling_nan(bfloat16, float_status *status);
bfloat16 bfloat16_silence_nan(bfloat16, float_status *status);
bfloat16 bfloat16_default_nan(float_status *status);
static inline bool bfloat16_is_any_nan(bfloat16 a)
{
return ((a & ~0x8000) > 0x7F80);
}
static inline bool bfloat16_is_neg(bfloat16 a)
{
return a >> 15;
}
static inline bool bfloat16_is_infinity(bfloat16 a)
{
return (a & 0x7fff) == 0x7F80;
}
static inline bool bfloat16_is_zero(bfloat16 a)
{
return (a & 0x7fff) == 0;
}
static inline bool bfloat16_is_zero_or_denormal(bfloat16 a)
{
return (a & 0x7F80) == 0;
}
static inline bool bfloat16_is_normal(bfloat16 a)
{
return (((a >> 7) + 1) & 0xff) >= 2;
}
static inline bfloat16 bfloat16_abs(bfloat16 a)
{
/* Note that abs does *not* handle NaN specially, nor does
* it flush denormal inputs to zero.
*/
return a & 0x7fff;
}
static inline bfloat16 bfloat16_chs(bfloat16 a)
{
/* Note that chs does *not* handle NaN specially, nor does
* it flush denormal inputs to zero.
*/
return a ^ 0x8000;
}
static inline bfloat16 bfloat16_set_sign(bfloat16 a, int sign)
{
return (a & 0x7fff) | (sign << 15);