/*

 * Written by J.T. Conklin <jtc@netbsd.org>.

 * Change for long double by Jakub Jelinek <jj@ultra.linux.cz>

 * Public domain.

 */

#if defined(LIBM_SCCS) && !defined(lint)

static char rcsid[] = "$NetBSD: $";

#endif

/*

 * isinfl(x) returns 1 if x is inf, -1 if x is -inf, else 0;

 * no branching!

 * slightly dodgy in relying on signed shift right copying sign bit

 */

#include <math.h>

#include <math_private.h>

#include <math_ldbl_opt.h>

int

___isinfl (long double x)

{

  double xhi;

  int64_t hx, mask;

  xhi = ldbl_high (x);

  EXTRACT_WORDS64 (hx, xhi);

  mask = (hx & 0x7fffffffffffffffLL) ^ 0x7ff0000000000000LL;

  mask |= -mask;

  mask >>= 63;

  return ~mask & (hx >> 62);

}

hidden_ver (___isinfl, __isinfl)

#if !IS_IN (libm)

weak_alias (___isinfl, ____isinfl)

long_double_symbol (libc, ___isinfl, isinfl);

long_double_symbol (libc, ____isinfl, __isinfl);

#endif