[thirdparty/glibc.git] / sysdeps / ieee754 / ldbl-128 / s_isinfl.c

/*
 * 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!
 */

#include <math.h>
#include <math_private.h>

int
__isinfl (_Float128 x)
{
	int64_t hx,lx;
	GET_LDOUBLE_WORDS64(hx,lx,x);
	lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL;
	lx |= -lx;
	return ~(lx >> 63) & (hx >> 62);
}
mathx_hidden_def (__isinfl)
weak_alias (__isinfl, isinfl)
Commit	Line	Data
76060ec0	1	/*
76060ec0 RM	2	* Public domain.
	3	*/
	4
	5	#if defined(LIBM_SCCS) && !defined(lint)
	6	static char rcsid[] = "$NetBSD: $";
	7	#endif
	8
	9	/*
0d8733c4	10	* isinfl(x) returns 1 if x is inf, -1 if x is -inf, else 0;
76060ec0 RM	11	* no branching!
	12	*/
	13
1ed0291c RH	14	#include <math.h>
1ed0291c RH	15	#include <math_private.h>
76060ec0	16
0413b54c	17	int
15089e04	18	__isinfl (_Float128 x)
76060ec0	19	{
abfbdde1 UD	20	int64_t hx,lx;
	21	GET_LDOUBLE_WORDS64(hx,lx,x);
	22	lx \|= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL;
9eb2730e	23	lx \|= -lx;
abfbdde1	24	return ~(lx >> 63) & (hx >> 62);
76060ec0	25	}
593bf718	26	mathx_hidden_def (__isinfl)
76060ec0	27	weak_alias (__isinfl, isinfl)