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fpu/softfloat: re-factor int/uint to float

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These are considerably simpler as the lower order integers can just
use the higher order conversion function. As the decomposed fractional
part is a full 64 bit rounding and inexact handling comes from the
pack functions.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Alex Bennée 2017-11-30 10:57:08 +00:00
parent ab52f973a5
commit c02e1fb80b
2 changed files with 172 additions and 180 deletions
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30
include/fpu/softfloat.h
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@ -190,9 +190,13 @@ enum {
/*----------------------------------------------------------------------------
| Software IEC/IEEE integer-to-floating-point conversion routines.
*----------------------------------------------------------------------------*/
float32 int16_to_float32(int16_t, float_status *status);
float32 int32_to_float32(int32_t, float_status *status);
float64 int16_to_float64(int16_t, float_status *status);
float64 int32_to_float64(int32_t, float_status *status);
float32 uint16_to_float32(uint16_t, float_status *status);
float32 uint32_to_float32(uint32_t, float_status *status);
float64 uint16_to_float64(uint16_t, float_status *status);
float64 uint32_to_float64(uint32_t, float_status *status);
floatx80 int32_to_floatx80(int32_t, float_status *status);
float128 int32_to_float128(int32_t, float_status *status);
@ -204,27 +208,6 @@ float32 uint64_to_float32(uint64_t, float_status *status);
float64 uint64_to_float64(uint64_t, float_status *status);
float128 uint64_to_float128(uint64_t, float_status *status);
/* We provide the int16 versions for symmetry of API with float-to-int */
static inline float32 int16_to_float32(int16_t v, float_status *status)
{
return int32_to_float32(v, status);
}
static inline float32 uint16_to_float32(uint16_t v, float_status *status)
{
return uint32_to_float32(v, status);
}
static inline float64 int16_to_float64(int16_t v, float_status *status)
{
return int32_to_float64(v, status);
}
static inline float64 uint16_to_float64(uint16_t v, float_status *status)
{
return uint32_to_float64(v, status);
}
/*----------------------------------------------------------------------------
| Software half-precision conversion routines.
*----------------------------------------------------------------------------*/
@ -245,6 +228,11 @@ uint64_t float16_to_uint64(float16 a, float_status *status);
int64_t float16_to_int64_round_to_zero(float16, float_status *status);
uint64_t float16_to_uint64_round_to_zero(float16 a, float_status *status);
float16 int16_to_float16(int16_t a, float_status *status);
float16 int32_to_float16(int32_t a, float_status *status);
float16 int64_to_float16(int64_t a, float_status *status);
float16 uint16_to_float16(uint16_t a, float_status *status);
float16 uint32_to_float16(uint32_t a, float_status *status);
float16 uint64_to_float16(uint64_t a, float_status *status);
/*----------------------------------------------------------------------------
| Software half-precision operations.