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authorFrank Chang <frank.chang@sifive.com>2020-07-30 02:52:24 -0700
committerRichard Henderson <richard.henderson@linaro.org>2020-08-28 10:48:07 -0700
commit0d93d8ec632154dea2627a9e989972ee09721187 (patch)
treed147bde9503b9cccb25b64348f59a9a0ae564ad9
parentdd205025a048ef6f53ff51eb86ddc58e7a82a771 (diff)
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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>
-rw-r--r--fpu/softfloat.c34
-rw-r--r--include/fpu/softfloat.h8
2 files changed, 42 insertions, 0 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 33abc82..64de0b4 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -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);
diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index 573fce9..0a5a5e5 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -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);