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softfloat: Add float/double to 16 bit integer conversion functions

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The ARM architecture needs float/double to 16 bit integer conversions.
(The 32 bit versions aren't sufficient because of the requirement
to saturate at 16 bit MAXINT/MININT and to get the exception bits right.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
This commit is contained in:
Peter Maydell 2010-12-07 15:37:34 +00:00
parent 26a5e69aaf
commit cbcef455a2
2 changed files with 140 additions and 0 deletions
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4
fpu/softfloat.h
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@ -251,6 +251,8 @@ float32 float16_to_float32( bits16, flag STATUS_PARAM );
/*----------------------------------------------------------------------------
| Software IEC/IEEE single-precision conversion routines.
*----------------------------------------------------------------------------*/
int float32_to_int16_round_to_zero( float32 STATUS_PARAM );
unsigned int float32_to_uint16_round_to_zero( float32 STATUS_PARAM );
int float32_to_int32( float32 STATUS_PARAM );
int float32_to_int32_round_to_zero( float32 STATUS_PARAM );
unsigned int float32_to_uint32( float32 STATUS_PARAM );
@ -327,6 +329,8 @@ INLINE int float32_is_any_nan(float32 a)
/*----------------------------------------------------------------------------
| Software IEC/IEEE double-precision conversion routines.
*----------------------------------------------------------------------------*/
int float64_to_int16_round_to_zero( float64 STATUS_PARAM );
unsigned int float64_to_uint16_round_to_zero( float64 STATUS_PARAM );
int float64_to_int32( float64 STATUS_PARAM );
int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
unsigned int float64_to_uint32( float64 STATUS_PARAM );