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[RFC 60/65] softfloat: add fp16 and uint8/int8 interconvert functions
From: |
frank . chang |
Subject: |
[RFC 60/65] softfloat: add fp16 and uint8/int8 interconvert functions |
Date: |
Fri, 10 Jul 2020 18:49:14 +0800 |
From: Frank Chang <frank.chang@sifive.com>
Signed-off-by: Frank Chang <frank.chang@sifive.com>
---
fpu/softfloat.c | 34 ++++++++++++++++++++++++++++++++++
include/fpu/softfloat.h | 8 ++++++++
2 files changed, 42 insertions(+)
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 79be4f5840..fa1c99c03e 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 ff4e2605b1..b0ae8f6295 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);
--
2.17.1
- [RFC 32/65] target/riscv: rvv-0.9: integer extension instructions, (continued)
- [RFC 32/65] target/riscv: rvv-0.9: integer extension instructions, frank . chang, 2020/07/10
- [RFC 33/65] target/riscv: rvv-0.9: single-width averaging add and subtract instructions, frank . chang, 2020/07/10
- [RFC 35/65] target/riscv: rvv-0.9: narrowing integer right shift instructions, frank . chang, 2020/07/10
- [RFC 38/65] target/riscv: rvv-0.9: integer merge and move instructions, frank . chang, 2020/07/10
- [RFC 39/65] target/riscv: rvv-0.9: single-width saturating add and subtract instructions, frank . chang, 2020/07/10
- [RFC 40/65] target/riscv: rvv-0.9: integer comparison instructions, frank . chang, 2020/07/10
- [RFC 43/65] target/riscv: rvv-0.9: widening integer reduction instructions, frank . chang, 2020/07/10
- [RFC 50/65] target/riscv: rvv-0.9: floating-point/integer type-convert instructions, frank . chang, 2020/07/10
- [RFC 54/65] target/riscv: rvv-0.9: remove widening saturating scaled multiply-add, frank . chang, 2020/07/10
- [RFC 55/65] target/riscv: rvv-0.9: remove vmford.vv and vmford.vf, frank . chang, 2020/07/10
- [RFC 60/65] softfloat: add fp16 and uint8/int8 interconvert functions,
frank . chang <=
[RFC 63/65] fpu: implement full set compare for fp16, frank . chang, 2020/07/10
[RFC 11/65] target/riscv: rvv-0.9: add fractional LMUL, VTA and VMA, frank . chang, 2020/07/10