[unix-history] / gnu / usr.bin / gcc1 / gnulib / longlong / negdi2.c

#include "longlong.h"

static int bneg ();

long long 
__negdi2 (u)
     long long u;
{
  unsigned long a[2], b[2];
  long_long w;
  long_long uu;

  uu.ll = u;

  a[HIGH] = uu.s.high;
  a[LOW] = uu.s.low;

  bneg (a, b, sizeof b);

  w.s.high = b[HIGH];
  w.s.low = b[LOW];
  return w.ll;
}

static int
bneg (a, b, n)
     unsigned short *a, *b;
     size_t n;
{
  signed long acc;
  int i;

  n /= sizeof (short);

  acc = 0;
  for (i = little_end (n); is_not_msd (i, n); i = next_msd (i))
    {
      acc -= a[i];
      b[i] = acc & low16;
      acc = acc >> 16;
    }
  return acc;
}
Commit	Line	Data
15637ed4 RG	1	#include "longlong.h"
	2
	3	static int bneg ();
	4
	5	long long
	6	__negdi2 (u)
	7	long long u;
	8	{
	9	unsigned long a[2], b[2];
	10	long_long w;
	11	long_long uu;
	12
	13	uu.ll = u;
	14
	15	a[HIGH] = uu.s.high;
	16	a[LOW] = uu.s.low;
	17
	18	bneg (a, b, sizeof b);
	19
	20	w.s.high = b[HIGH];
	21	w.s.low = b[LOW];
	22	return w.ll;
	23	}
	24
	25	static int
	26	bneg (a, b, n)
	27	unsigned short a, b;
	28	size_t n;
	29	{
	30	signed long acc;
	31	int i;
	32
	33	n /= sizeof (short);
	34
	35	acc = 0;
	36	for (i = little_end (n); is_not_msd (i, n); i = next_msd (i))
	37	{
	38	acc -= a[i];
	39	b[i] = acc & low16;
	40	acc = acc >> 16;
	41	}
	42	return acc;
	43	}