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That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, LIU Zhiwei Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: LIU Zhiwei Signed-off-by: LIU Zhiwei Reviewed-by: Richard Henderson Message-Id: <20200813071421.2509-3-zhiwei_liu@c-sky.com> [rth: Use FloatRoundMode for conversion functions.] Signed-off-by: Richard Henderson --- include/fpu/softfloat.h | 54 ++++++++++ fpu/softfloat.c | 223 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 277 insertions(+) diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h index 68b3cf488d..95f0789a92 100644 --- a/include/fpu/softfloat.h +++ b/include/fpu/softfloat.h @@ -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. *----------------------------------------------------------------------------*/ diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 77d81ab9b0..67cfa0fd82 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -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 -- 2.25.1