softfloat/s_normRoundPackToF64.c

   1
   2 #include <stdbool.h>
   3 #include <stdint.h>
   4 #include "platform.h"
   5 #include "primitives.h"
   6 #include "internals.h"
   7
   8 float64_t
   9  softfloat_normRoundPackToF64( bool sign, int_fast16_t exp, uint_fast64_t sig )
  10 {
  11     int shiftCount;
  12     union ui64_f64 uZ;
  13
  14     shiftCount = softfloat_countLeadingZeros64( sig ) - 1;
  15     exp -= shiftCount;
  16     if ( ( 10 <= shiftCount ) && ( (uint16_t) exp < 0x7FD ) ) {
  17         uZ.ui = packToF64UI( sign, sig ? exp : 0, sig<<( shiftCount - 10 ) );
  18         return uZ.f;
  19     } else {
  20         return softfloat_roundPackToF64( sign, exp, sig<<shiftCount );
  21     }
  22
  23 }
  24