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| author | LIU Zhiwei <zhiwei_liu@c-sky.com> | 2020-08-13 15:14:19 +0800 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2020-08-28 10:48:07 -0700 |
| commit | 8282310d8535cc2a8431c516e907da79f92df6eb (patch) | |
| tree | 770b25f08c3f2ba057fdccb9ce496bf94b1c5d1e /include/fpu | |
| parent | a03e924cf8a22888060fc0de4d91de053cd5cde4 (diff) | |
| download | qemu-8282310d8535cc2a8431c516e907da79f92df6eb.zip qemu-8282310d8535cc2a8431c516e907da79f92df6eb.tar.gz qemu-8282310d8535cc2a8431c516e907da79f92df6eb.tar.bz2 | |
softfloat: Define operations for bfloat16
This patch implements operations for bfloat16 except conversion and some misc
operations. We also add FloatFmt and pack/unpack interfaces for bfloat16.
As they are both static fields, we can't make a sperate patch for them.
Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200813071421.2509-2-zhiwei_liu@c-sky.com>
[rth: Use FloatRelation for comparison operations.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'include/fpu')
| -rw-r--r-- | include/fpu/softfloat-types.h | 5 | ||||
| -rw-r--r-- | include/fpu/softfloat.h | 38 |
2 files changed, 43 insertions, 0 deletions
diff --git a/include/fpu/softfloat-types.h b/include/fpu/softfloat-types.h index c7ddcab..8a3f20f 100644 --- a/include/fpu/softfloat-types.h +++ b/include/fpu/softfloat-types.h @@ -113,6 +113,11 @@ typedef struct { #define make_float128_init(high_, low_) { .high = high_, .low = low_ } /* + * Software neural-network floating-point types. + */ +typedef uint16_t bfloat16; + +/* * Software IEC/IEEE floating-point underflow tininess-detection mode. */ diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h index 863dfc6..68b3cf4 100644 --- a/include/fpu/softfloat.h +++ b/include/fpu/softfloat.h @@ -109,6 +109,7 @@ void float_raise(uint8_t flags, float_status *status); float16 float16_squash_input_denormal(float16 a, float_status *status); float32 float32_squash_input_denormal(float32 a, float_status *status); float64 float64_squash_input_denormal(float64 a, float_status *status); +bfloat16 bfloat16_squash_input_denormal(bfloat16 a, float_status *status); /*---------------------------------------------------------------------------- | Options to indicate which negations to perform in float*_muladd() @@ -348,6 +349,43 @@ static inline bool float16_unordered_quiet(float16 a, float16 b, #define float16_infinity make_float16(0x7c00) /*---------------------------------------------------------------------------- +| Software bfloat16 operations. +*----------------------------------------------------------------------------*/ + +bfloat16 bfloat16_add(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_sub(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_mul(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_div(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_muladd(bfloat16, bfloat16, bfloat16, int, + float_status *status); +float16 bfloat16_scalbn(bfloat16, int, float_status *status); +bfloat16 bfloat16_min(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_max(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_minnum(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_maxnum(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_minnummag(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_maxnummag(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_sqrt(bfloat16, float_status *status); +FloatRelation bfloat16_compare(bfloat16, bfloat16, float_status *status); +FloatRelation bfloat16_compare_quiet(bfloat16, bfloat16, float_status *status); + +bfloat16 bfloat16_silence_nan(bfloat16, float_status *status); +bfloat16 bfloat16_default_nan(float_status *status); + +static inline bfloat16 bfloat16_set_sign(bfloat16 a, int sign) +{ + return (a & 0x7fff) | (sign << 15); +} + +#define bfloat16_zero 0 +#define bfloat16_half 0x3f00 +#define bfloat16_one 0x3f80 +#define bfloat16_one_point_five 0x3fc0 +#define bfloat16_two 0x4000 +#define bfloat16_three 0x4040 +#define bfloat16_infinity 0x7f80 + +/*---------------------------------------------------------------------------- | The pattern for a default generated half-precision NaN. *----------------------------------------------------------------------------*/ float16 float16_default_nan(float_status *status); |