glibc/math/w_fmod.c
Ulrich Drepper 7095366d1e * math/w_fmod.c: Also handle x=±Inf as error.
* math/w_fmodf.c: Likewise.
	* math/w_fmodl.c: Likewise.
	* math/libm-test.inc (fmod_test): Add tests for errno after calls for
	x=±Inf or y=0.
2009-04-26 03:43:02 +00:00

50 lines
1.1 KiB
C

/* @(#)w_fmod.c 5.1 93/09/24 */
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
#if defined(LIBM_SCCS) && !defined(lint)
static char rcsid[] = "$NetBSD: w_fmod.c,v 1.6 1995/05/10 20:48:55 jtc Exp $";
#endif
/*
* wrapper fmod(x,y)
*/
#include <math.h>
#include "math_private.h"
#ifdef __STDC__
double __fmod(double x, double y) /* wrapper fmod */
#else
double __fmod(x,y) /* wrapper fmod */
double x,y;
#endif
{
#ifdef _IEEE_LIBM
return __ieee754_fmod(x,y);
#else
double z;
z = __ieee754_fmod(x,y);
if(_LIB_VERSION == _IEEE_ ||__isnan(y)||__isnan(x)) return z;
if(__isinf(x)||y==0.0) {
/* fmod(+-Inf,y) or fmod(x,0) */
return __kernel_standard(x,y,27);
} else
return z;
#endif
}
weak_alias (__fmod, fmod)
#ifdef NO_LONG_DOUBLE
strong_alias (__fmod, __fmodl)
weak_alias (__fmod, fmodl)
#endif