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softfloat: Add fp16 and uint8/int8 conversion functions

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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
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@ -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);