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softfloat: Add fp16 and uint8/int8 conversion functions 

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Message-Id: <1596102747-20226-4-git-send-email-chihmin.chao@sifive.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Frank Chang 2020-07-30 02:52:24 -07:00 committed by Richard Henderson
parent dd205025a0
commit 0d93d8ec63
2 changed files with 42 additions and 0 deletions
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34
fpu/softfloat.c
View File

@ -2109,6 +2109,13 @@ static int64_t round_to_int_and_pack(FloatParts in, FloatRoundMode rmode,
}
}
int8_t float16_to_int8_scalbn(float16 a, FloatRoundMode rmode, int scale,
float_status *s)
{
return round_to_int_and_pack(float16_unpack_canonical(a, s),
rmode, scale, INT8_MIN, INT8_MAX, s);
}
int16_t float16_to_int16_scalbn(float16 a, FloatRoundMode rmode, int scale,
float_status *s)
{
@ -2172,6 +2179,11 @@ int64_t float64_to_int64_scalbn(float64 a, FloatRoundMode rmode, int scale,
rmode, scale, INT64_MIN, INT64_MAX, s);
}
int8_t float16_to_int8(float16 a, float_status *s)
{
return float16_to_int8_scalbn(a, s->float_rounding_mode, 0, s);
}
int16_t float16_to_int16(float16 a, float_status *s)
{
return float16_to_int16_scalbn(a, s->float_rounding_mode, 0, s);
@ -2322,6 +2334,13 @@ static uint64_t round_to_uint_and_pack(FloatParts in, FloatRoundMode rmode,
}
}
uint8_t float16_to_uint8_scalbn(float16 a, FloatRoundMode rmode, int scale,
float_status *s)
{
return round_to_uint_and_pack(float16_unpack_canonical(a, s),
rmode, scale, UINT8_MAX, s);
}
uint16_t float16_to_uint16_scalbn(float16 a, FloatRoundMode rmode, int scale,
float_status *s)
{
@ -2385,6 +2404,11 @@ uint64_t float64_to_uint64_scalbn(float64 a, FloatRoundMode rmode, int scale,
rmode, scale, UINT64_MAX, s);
}
uint8_t float16_to_uint8(float16 a, float_status *s)
{
return float16_to_uint8_scalbn(a, s->float_rounding_mode, 0, s);
}
uint16_t float16_to_uint16(float16 a, float_status *s)
{
return float16_to_uint16_scalbn(a, s->float_rounding_mode, 0, s);
@ -2539,6 +2563,11 @@ float16 int16_to_float16(int16_t a, float_status *status)
return int64_to_float16_scalbn(a, 0, status);
}
float16 int8_to_float16(int8_t a, float_status *status)
{
return int64_to_float16_scalbn(a, 0, status);
}
float32 int64_to_float32_scalbn(int64_t a, int scale, float_status *status)
{
FloatParts pa = int_to_float(a, scale, status);
@ -2664,6 +2693,11 @@ float16 uint16_to_float16(uint16_t a, float_status *status)
return uint64_to_float16_scalbn(a, 0, status);
}
float16 uint8_to_float16(uint8_t a, float_status *status)
{
return uint64_to_float16_scalbn(a, 0, status);
}
float32 uint64_to_float32_scalbn(uint64_t a, int scale, float_status *status)
{
FloatParts pa = uint_to_float(a, scale, status);

8
include/fpu/softfloat.h
View File

@ -136,9 +136,11 @@ float16 uint16_to_float16_scalbn(uint16_t a, int, float_status *status);
float16 uint32_to_float16_scalbn(uint32_t a, int, float_status *status);
float16 uint64_to_float16_scalbn(uint64_t a, int, float_status *status);
float16 int8_to_float16(int8_t 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 uint8_to_float16(uint8_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);
@ -187,10 +189,13 @@ float32 float16_to_float32(float16, bool ieee, float_status *status);
float16 float64_to_float16(float64 a, bool ieee, float_status *status);
float64 float16_to_float64(float16 a, bool ieee, float_status *status);
int8_t float16_to_int8_scalbn(float16, FloatRoundMode, int,
float_status *status);
int16_t float16_to_int16_scalbn(float16, FloatRoundMode, int, float_status *);
int32_t float16_to_int32_scalbn(float16, FloatRoundMode, int, float_status *);
int64_t float16_to_int64_scalbn(float16, FloatRoundMode, int, float_status *);
int8_t float16_to_int8(float16, float_status *status);
int16_t float16_to_int16(float16, float_status *status);
int32_t float16_to_int32(float16, float_status *status);
int64_t float16_to_int64(float16, float_status *status);
@ -199,6 +204,8 @@ int16_t float16_to_int16_round_to_zero(float16, float_status *status);
int32_t float16_to_int32_round_to_zero(float16, float_status *status);
int64_t float16_to_int64_round_to_zero(float16, float_status *status);
uint8_t float16_to_uint8_scalbn(float16 a, FloatRoundMode,
int, float_status *status);
uint16_t float16_to_uint16_scalbn(float16 a, FloatRoundMode,
int, float_status *status);
uint32_t float16_to_uint32_scalbn(float16 a, FloatRoundMode,
@ -206,6 +213,7 @@ uint32_t float16_to_uint32_scalbn(float16 a, FloatRoundMode,
uint64_t float16_to_uint64_scalbn(float16 a, FloatRoundMode,
int, float_status *status);
uint8_t float16_to_uint8(float16 a, float_status *status);
uint16_t float16_to_uint16(float16 a, float_status *status);
uint32_t float16_to_uint32(float16 a, float_status *status);
uint64_t float16_to_uint64(float16 a, float_status *status);