Net2/usr/src/usr.bin/gcc/gnulib/longlong/floatdidf.c

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#include "longlong.h"

#define HIGH_HALFWORD_COEFF (((long long) 1) << (BITS_PER_WORD / 2))
#define HIGH_WORD_COEFF (((long long) 1) << BITS_PER_WORD)

double
__floatdidf (u)
     long long u;
{
  double d;
  int negate = 0;

  if (u < 0)
    u = -u, negate = 1;

  d = (unsigned int) (u >> BITS_PER_WORD);
  d *= HIGH_HALFWORD_COEFF;
  d *= HIGH_HALFWORD_COEFF;
  d += (unsigned int) (u & (HIGH_WORD_COEFF - 1));

  return (negate ? -d : d);
}