vitalif
/
mirror_qemu
mirror of https://github.com/proxmox/mirror_qemu
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

softfloat: Define convert operations for bfloat16 

Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200813071421.2509-3-zhiwei_liu@c-sky.com>
[rth: Use FloatRoundMode for conversion functions.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
master
LIU Zhiwei 2020-08-13 15:14:20 +08:00 committed by Richard Henderson
parent 8282310d85
commit 34f0c0a98a
2 changed files with 277 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

223
fpu/softfloat.c
View File

@ -2014,6 +2014,34 @@ float32 float64_to_float32(float64 a, float_status *s)
return float32_round_pack_canonical(pr, s);
}
float32 bfloat16_to_float32(bfloat16 a, float_status *s)
{
FloatParts p = bfloat16_unpack_canonical(a, s);
FloatParts pr = float_to_float(p, &float32_params, s);
return float32_round_pack_canonical(pr, s);
}
float64 bfloat16_to_float64(bfloat16 a, float_status *s)
{
FloatParts p = bfloat16_unpack_canonical(a, s);
FloatParts pr = float_to_float(p, &float64_params, s);
return float64_round_pack_canonical(pr, s);
}
bfloat16 float32_to_bfloat16(float32 a, float_status *s)
{
FloatParts p = float32_unpack_canonical(a, s);
FloatParts pr = float_to_float(p, &bfloat16_params, s);
return bfloat16_round_pack_canonical(pr, s);
}
bfloat16 float64_to_bfloat16(float64 a, float_status *s)
{
FloatParts p = float64_unpack_canonical(a, s);
FloatParts pr = float_to_float(p, &bfloat16_params, s);
return bfloat16_round_pack_canonical(pr, s);
}
/*
* Rounds the floating-point value `a' to an integer, and returns the
* result as a floating-point value. The operation is performed
@ -2143,6 +2171,18 @@ float64 float64_round_to_int(float64 a, float_status *s)
return float64_round_pack_canonical(pr, s);
}
/*
* Rounds the bfloat16 value `a' to an integer, and returns the
* result as a bfloat16 value.
*/
bfloat16 bfloat16_round_to_int(bfloat16 a, float_status *s)
{
FloatParts pa = bfloat16_unpack_canonical(a, s);
FloatParts pr = round_to_int(pa, s->float_rounding_mode, 0, s);
return bfloat16_round_pack_canonical(pr, s);
}
/*
* Returns the result of converting the floating-point value `a' to
* the two's complement integer format. The conversion is performed
@ -2365,6 +2405,62 @@ int64_t float64_to_int64_round_to_zero(float64 a, float_status *s)
return float64_to_int64_scalbn(a, float_round_to_zero, 0, s);
}
/*
* Returns the result of converting the floating-point value `a' to
* the two's complement integer format.
*/
int16_t bfloat16_to_int16_scalbn(bfloat16 a, FloatRoundMode rmode, int scale,
float_status *s)
{
return round_to_int_and_pack(bfloat16_unpack_canonical(a, s),
rmode, scale, INT16_MIN, INT16_MAX, s);
}
int32_t bfloat16_to_int32_scalbn(bfloat16 a, FloatRoundMode rmode, int scale,
float_status *s)
{
return round_to_int_and_pack(bfloat16_unpack_canonical(a, s),
rmode, scale, INT32_MIN, INT32_MAX, s);
}
int64_t bfloat16_to_int64_scalbn(bfloat16 a, FloatRoundMode rmode, int scale,
float_status *s)
{
return round_to_int_and_pack(bfloat16_unpack_canonical(a, s),
rmode, scale, INT64_MIN, INT64_MAX, s);
}
int16_t bfloat16_to_int16(bfloat16 a, float_status *s)
{
return bfloat16_to_int16_scalbn(a, s->float_rounding_mode, 0, s);
}
int32_t bfloat16_to_int32(bfloat16 a, float_status *s)
{
return bfloat16_to_int32_scalbn(a, s->float_rounding_mode, 0, s);
}
int64_t bfloat16_to_int64(bfloat16 a, float_status *s)
{
return bfloat16_to_int64_scalbn(a, s->float_rounding_mode, 0, s);
}
int16_t bfloat16_to_int16_round_to_zero(bfloat16 a, float_status *s)
{
return bfloat16_to_int16_scalbn(a, float_round_to_zero, 0, s);
}
int32_t bfloat16_to_int32_round_to_zero(bfloat16 a, float_status *s)
{
return bfloat16_to_int32_scalbn(a, float_round_to_zero, 0, s);
}
int64_t bfloat16_to_int64_round_to_zero(bfloat16 a, float_status *s)
{
return bfloat16_to_int64_scalbn(a, float_round_to_zero, 0, s);
}
/*
* Returns the result of converting the floating-point value `a' to
* the unsigned integer format. The conversion is performed according
@ -2590,6 +2686,62 @@ uint64_t float64_to_uint64_round_to_zero(float64 a, float_status *s)
return float64_to_uint64_scalbn(a, float_round_to_zero, 0, s);
}
/*
* Returns the result of converting the bfloat16 value `a' to
* the unsigned integer format.
*/
uint16_t bfloat16_to_uint16_scalbn(bfloat16 a, FloatRoundMode rmode,
int scale, float_status *s)
{
return round_to_uint_and_pack(bfloat16_unpack_canonical(a, s),
rmode, scale, UINT16_MAX, s);
}
uint32_t bfloat16_to_uint32_scalbn(bfloat16 a, FloatRoundMode rmode,
int scale, float_status *s)
{
return round_to_uint_and_pack(bfloat16_unpack_canonical(a, s),
rmode, scale, UINT32_MAX, s);
}
uint64_t bfloat16_to_uint64_scalbn(bfloat16 a, FloatRoundMode rmode,
int scale, float_status *s)
{
return round_to_uint_and_pack(bfloat16_unpack_canonical(a, s),
rmode, scale, UINT64_MAX, s);
}
uint16_t bfloat16_to_uint16(bfloat16 a, float_status *s)
{
return bfloat16_to_uint16_scalbn(a, s->float_rounding_mode, 0, s);
}
uint32_t bfloat16_to_uint32(bfloat16 a, float_status *s)
{
return bfloat16_to_uint32_scalbn(a, s->float_rounding_mode, 0, s);
}
uint64_t bfloat16_to_uint64(bfloat16 a, float_status *s)
{
return bfloat16_to_uint64_scalbn(a, s->float_rounding_mode, 0, s);
}
uint16_t bfloat16_to_uint16_round_to_zero(bfloat16 a, float_status *s)
{
return bfloat16_to_uint16_scalbn(a, float_round_to_zero, 0, s);
}
uint32_t bfloat16_to_uint32_round_to_zero(bfloat16 a, float_status *s)
{
return bfloat16_to_uint32_scalbn(a, float_round_to_zero, 0, s);
}
uint64_t bfloat16_to_uint64_round_to_zero(bfloat16 a, float_status *s)
{
return bfloat16_to_uint64_scalbn(a, float_round_to_zero, 0, s);
}
/*
* Integer to float conversions
*
@ -2721,6 +2873,41 @@ float64 int16_to_float64(int16_t a, float_status *status)
return int64_to_float64_scalbn(a, 0, status);
}
/*
* Returns the result of converting the two's complement integer `a'
* to the bfloat16 format.
*/
bfloat16 int64_to_bfloat16_scalbn(int64_t a, int scale, float_status *status)
{
FloatParts pa = int_to_float(a, scale, status);
return bfloat16_round_pack_canonical(pa, status);
}
bfloat16 int32_to_bfloat16_scalbn(int32_t a, int scale, float_status *status)
{
return int64_to_bfloat16_scalbn(a, scale, status);
}
bfloat16 int16_to_bfloat16_scalbn(int16_t a, int scale, float_status *status)
{
return int64_to_bfloat16_scalbn(a, scale, status);
}
bfloat16 int64_to_bfloat16(int64_t a, float_status *status)
{
return int64_to_bfloat16_scalbn(a, 0, status);
}
bfloat16 int32_to_bfloat16(int32_t a, float_status *status)
{
return int64_to_bfloat16_scalbn(a, 0, status);
}
bfloat16 int16_to_bfloat16(int16_t a, float_status *status)
{
return int64_to_bfloat16_scalbn(a, 0, status);
}
/*
* Unsigned Integer to float conversions
@ -2851,6 +3038,42 @@ float64 uint16_to_float64(uint16_t a, float_status *status)
return uint64_to_float64_scalbn(a, 0, status);
}
/*
* Returns the result of converting the unsigned integer `a' to the
* bfloat16 format.
*/
bfloat16 uint64_to_bfloat16_scalbn(uint64_t a, int scale, float_status *status)
{
FloatParts pa = uint_to_float(a, scale, status);
return bfloat16_round_pack_canonical(pa, status);
}
bfloat16 uint32_to_bfloat16_scalbn(uint32_t a, int scale, float_status *status)
{
return uint64_to_bfloat16_scalbn(a, scale, status);
}
bfloat16 uint16_to_bfloat16_scalbn(uint16_t a, int scale, float_status *status)
{
return uint64_to_bfloat16_scalbn(a, scale, status);
}
bfloat16 uint64_to_bfloat16(uint64_t a, float_status *status)
{
return uint64_to_bfloat16_scalbn(a, 0, status);
}
bfloat16 uint32_to_bfloat16(uint32_t a, float_status *status)
{
return uint64_to_bfloat16_scalbn(a, 0, status);
}
bfloat16 uint16_to_bfloat16(uint16_t a, float_status *status)
{
return uint64_to_bfloat16_scalbn(a, 0, status);
}
/* Float Min/Max */
/* min() and max() functions. These can't be implemented as
* 'compare and pick one input' because that would mishandle

54
include/fpu/softfloat.h
View File

@ -348,6 +348,60 @@ static inline bool float16_unordered_quiet(float16 a, float16 b,
#define float16_three make_float16(0x4200)
#define float16_infinity make_float16(0x7c00)
/*----------------------------------------------------------------------------
| Software bfloat16 conversion routines.
*----------------------------------------------------------------------------*/
bfloat16 bfloat16_round_to_int(bfloat16, float_status *status);
bfloat16 float32_to_bfloat16(float32, float_status *status);
float32 bfloat16_to_float32(bfloat16, float_status *status);
bfloat16 float64_to_bfloat16(float64 a, float_status *status);
float64 bfloat16_to_float64(bfloat16 a, float_status *status);
int16_t bfloat16_to_int16_scalbn(bfloat16, FloatRoundMode,
int, float_status *status);
int32_t bfloat16_to_int32_scalbn(bfloat16, FloatRoundMode,
int, float_status *status);
int64_t bfloat16_to_int64_scalbn(bfloat16, FloatRoundMode,
int, float_status *status);
int16_t bfloat16_to_int16(bfloat16, float_status *status);
int32_t bfloat16_to_int32(bfloat16, float_status *status);
int64_t bfloat16_to_int64(bfloat16, float_status *status);
int16_t bfloat16_to_int16_round_to_zero(bfloat16, float_status *status);
int32_t bfloat16_to_int32_round_to_zero(bfloat16, float_status *status);
int64_t bfloat16_to_int64_round_to_zero(bfloat16, float_status *status);
uint16_t bfloat16_to_uint16_scalbn(bfloat16 a, FloatRoundMode,
int, float_status *status);
uint32_t bfloat16_to_uint32_scalbn(bfloat16 a, FloatRoundMode,
int, float_status *status);
uint64_t bfloat16_to_uint64_scalbn(bfloat16 a, FloatRoundMode,
int, float_status *status);
uint16_t bfloat16_to_uint16(bfloat16 a, float_status *status);
uint32_t bfloat16_to_uint32(bfloat16 a, float_status *status);
uint64_t bfloat16_to_uint64(bfloat16 a, float_status *status);
uint16_t bfloat16_to_uint16_round_to_zero(bfloat16 a, float_status *status);
uint32_t bfloat16_to_uint32_round_to_zero(bfloat16 a, float_status *status);
uint64_t bfloat16_to_uint64_round_to_zero(bfloat16 a, float_status *status);
bfloat16 int16_to_bfloat16_scalbn(int16_t a, int, float_status *status);
bfloat16 int32_to_bfloat16_scalbn(int32_t a, int, float_status *status);
bfloat16 int64_to_bfloat16_scalbn(int64_t a, int, float_status *status);
bfloat16 uint16_to_bfloat16_scalbn(uint16_t a, int, float_status *status);
bfloat16 uint32_to_bfloat16_scalbn(uint32_t a, int, float_status *status);
bfloat16 uint64_to_bfloat16_scalbn(uint64_t a, int, float_status *status);
bfloat16 int16_to_bfloat16(int16_t a, float_status *status);
bfloat16 int32_to_bfloat16(int32_t a, float_status *status);
bfloat16 int64_to_bfloat16(int64_t a, float_status *status);
bfloat16 uint16_to_bfloat16(uint16_t a, float_status *status);
bfloat16 uint32_to_bfloat16(uint32_t a, float_status *status);
bfloat16 uint64_to_bfloat16(uint64_t a, float_status *status);
/*----------------------------------------------------------------------------
| Software bfloat16 operations.
*----------------------------------------------------------------------------*/