softfloat/i64_to_f64.c

   1
   2 #include <stdbool.h>
   3 #include <stdint.h>
   4 #include "platform.h"
   5 #include "internals.h"
   6 #include "softfloat.h"
   7
   8 float64_t i64_to_f64( int_fast64_t a )
   9 {
  10     bool sign;
  11     union ui64_f64 uZ;
  12
  13     sign = ( a < 0 );
  14     if ( ! ( a & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) ) {
  15         uZ.ui = sign ? packToF64UI( 1, 0x43E, 0 ) : 0;
  16         return uZ.f;
  17     }
  18     return softfloat_normRoundPackToF64( sign, 0x43C, sign ? - a : a );
  19
  20 }
  21