[thirdparty/gcc.git] / libquadmath / math / isinfq.c

/*
 * 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

/*
 * isinfq(x) returns 1 if x is inf, -1 if x is -inf, else 0;
 * no branching!
 */

#include "quadmath-imp.h"

int
isinfq (__float128 x)
{
	int64_t hx,lx;
	GET_FLT128_WORDS64(hx,lx,x);
	lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL;
	lx |= -lx;
	return ~(lx >> 63) & (hx >> 62);
}
Commit	Line	Data
1ec601bf FXC	1	/*
	2	* Written by J.T. Conklin <jtc@netbsd.org>.
	3	* Change for long double by Jakub Jelinek <jj@ultra.linux.cz>
	4	* Public domain.
	5	*/
	6
4239f144 JM	7	#if defined(LIBM_SCCS) && !defined(lint)
	8	static char rcsid[] = "$NetBSD: $";
	9	#endif
	10
	11	/*
	12	* isinfq(x) returns 1 if x is inf, -1 if x is -inf, else 0;
	13	* no branching!
	14	*/
	15
1ec601bf FXC	16	#include "quadmath-imp.h"
	17
	18	int
	19	isinfq (__float128 x)
	20	{
4239f144 JM	21	int64_t hx,lx;
	22	GET_FLT128_WORDS64(hx,lx,x);
	23	lx \|= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL;
	24	lx \|= -lx;
	25	return ~(lx >> 63) & (hx >> 62);
1ec601bf	26	}