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include/fpu/softfloat: implement float16_abs helper

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This will be required when expanding the MINMAX() macro for 16
bit/half-precision operations.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alex Bennée 2017-07-03 14:33:08 +01:00
parent 24f91e81b6
commit 28136775cd
1 changed files with 7 additions and 0 deletions
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7
include/fpu/softfloat.h
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@ -265,6 +265,13 @@ static inline int float16_is_zero_or_denormal(float16 a)
return (float16_val(a) & 0x7c00) == 0;
}
static inline float16 float16_abs(float16 a)
{
/* Note that abs does *not* handle NaN specially, nor does
* it flush denormal inputs to zero.
*/
return make_float16(float16_val(a) & 0x7fff);
}
/*----------------------------------------------------------------------------
| The pattern for a default generated half-precision NaN.
*----------------------------------------------------------------------------*/