You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
35 lines
1.1 KiB
35 lines
1.1 KiB
// See LICENSE for license details.
|
|
|
|
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include "platform.h"
|
|
#include "internals.h"
|
|
#include "specialize.h"
|
|
#include "softfloat.h"
|
|
|
|
uint_fast16_t f32_classify( float32_t a )
|
|
{
|
|
union ui32_f32 uA;
|
|
uint_fast32_t uiA;
|
|
|
|
uA.f = a;
|
|
uiA = uA.ui;
|
|
|
|
uint_fast16_t infOrNaN = expF32UI( uiA ) == 0xFF;
|
|
uint_fast16_t subnormalOrZero = expF32UI( uiA ) == 0;
|
|
bool sign = signF32UI( uiA );
|
|
|
|
return
|
|
( sign && infOrNaN && fracF32UI( uiA ) == 0 ) << 0 |
|
|
( sign && !infOrNaN && !subnormalOrZero ) << 1 |
|
|
( sign && subnormalOrZero && fracF32UI( uiA ) ) << 2 |
|
|
( sign && subnormalOrZero && fracF32UI( uiA ) == 0 ) << 3 |
|
|
( !sign && infOrNaN && fracF32UI( uiA ) == 0 ) << 7 |
|
|
( !sign && !infOrNaN && !subnormalOrZero ) << 6 |
|
|
( !sign && subnormalOrZero && fracF32UI( uiA ) ) << 5 |
|
|
( !sign && subnormalOrZero && fracF32UI( uiA ) == 0 ) << 4 |
|
|
( isNaNF32UI( uiA ) && softfloat_isSigNaNF32UI( uiA )) << 8 |
|
|
( isNaNF32UI( uiA ) && !softfloat_isSigNaNF32UI( uiA )) << 9;
|
|
}
|
|
|
|
|