softfloat/f32_eq.c

   1
   2 #include <stdbool.h>
   3 #include <stdint.h>
   4 #include "platform.h"
   5 #include "internals.h"
   6 #include "specialize.h"
   7 #include "softfloat.h"
   8
   9 bool f32_eq( float32_t a, float32_t b )
  10 {
  11     union ui32_f32 uA;
  12     uint_fast32_t uiA;
  13     union ui32_f32 uB;
  14     uint_fast32_t uiB;
  15
  16     uA.f = a;
  17     uiA = uA.ui;
  18     uB.f = b;
  19     uiB = uB.ui;
  20     if (
  21            ( ( expF32UI( uiA ) == 0xFF ) && fracF32UI( uiA ) )
  22         || ( ( expF32UI( uiB ) == 0xFF ) && fracF32UI( uiB ) )
  23     ) {
  24         if (
  25             softfloat_isSigNaNF32UI( uiA ) || softfloat_isSigNaNF32UI( uiB )
  26         ) {
  27             softfloat_raiseFlags( softfloat_flag_invalid );
  28         }
  29         return false;
  30     }
  31     return ( uiA == uiB ) || ! (uint32_t) ( ( uiA | uiB )<<1 );
  32
  33 }
  34