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| author | Han-Kuan Chen <hankuan.chen@sifive.com> | 2020-03-24 19:39:36 -0700 |
|---|---|---|
| committer | Han-Kuan Chen <hankuan.chen@sifive.com> | 2020-03-24 19:40:37 -0700 |
| commit | 2d11e8acaef0573903f795e7277352c1442d64d2 (patch) | |
| tree | 2f930c3aa9eeea3c3aa5d97d95b50e3dadd0444c /softfloat | |
| parent | 6cc52d6029e4236ba3b0d5c8e4a842f4a53b469b (diff) | |
| download | spike-2d11e8acaef0573903f795e7277352c1442d64d2.zip spike-2d11e8acaef0573903f795e7277352c1442d64d2.tar.gz spike-2d11e8acaef0573903f795e7277352c1442d64d2.tar.bz2 | |
add f16_classify
Diffstat (limited to 'softfloat')
| -rwxr-xr-x | softfloat/f16_classify.c | 36 | ||||
| -rw-r--r-- | softfloat/softfloat.mk.in | 1 |
2 files changed, 37 insertions, 0 deletions
diff --git a/softfloat/f16_classify.c b/softfloat/f16_classify.c new file mode 100755 index 0000000..9402ff1 --- /dev/null +++ b/softfloat/f16_classify.c @@ -0,0 +1,36 @@ + +#include <stdbool.h> +#include <stdint.h> +#include "platform.h" +#include "internals.h" +#include "specialize.h" +#include "softfloat.h" + +uint_fast16_t f16_classify( float16_t a ) +{ + union ui16_f16 uA; + uint_fast16_t uiA; + + uA.f = a; + uiA = uA.ui; + + uint_fast16_t infOrNaN = expF16UI( uiA ) == 0x1F; + uint_fast16_t subnormalOrZero = expF16UI( uiA ) == 0; + bool sign = signF16UI( uiA ); + bool fracZero = fracF16UI( uiA ) == 0; + bool isNaN = isNaNF16UI( uiA ); + bool isSNaN = softfloat_isSigNaNF16UI( uiA ); + + return + ( sign && infOrNaN && fracZero ) << 0 | + ( sign && !infOrNaN && !subnormalOrZero ) << 1 | + ( sign && subnormalOrZero && !fracZero ) << 2 | + ( sign && subnormalOrZero && fracZero ) << 3 | + ( !sign && infOrNaN && fracZero ) << 7 | + ( !sign && !infOrNaN && !subnormalOrZero ) << 6 | + ( !sign && subnormalOrZero && !fracZero ) << 5 | + ( !sign && subnormalOrZero && fracZero ) << 4 | + ( isNaN && isSNaN ) << 8 | + ( isNaN && !isSNaN ) << 9; +} + diff --git a/softfloat/softfloat.mk.in b/softfloat/softfloat.mk.in index 52ee1dd..0ca17cd 100644 --- a/softfloat/softfloat.mk.in +++ b/softfloat/softfloat.mk.in @@ -38,6 +38,7 @@ softfloat_c_srcs = \ f128_to_ui64.c \ f128_to_ui64_r_minMag.c \ f16_add.c \ + f16_classify.c \ f16_div.c \ f16_eq.c \ f16_eq_signaling.c \ |