/* $OpenBSD: signbit.c,v 1.7 2013/07/03 04:46:36 espie Exp $ */ /* * Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <sys/types.h> #include <machine/ieee.h> #include <float.h> #include <math.h> int __signbit(double d) { struct ieee_double *p = (struct ieee_double *)&d; return p->dbl_sign; } int __signbitf(float f) { struct ieee_single *p = (struct ieee_single *)&f; return p->sng_sign; } #if LDBL_MANT_DIG == DBL_MANT_DIG __strong_alias(__signbitl, __signbit); #endif /* LDBL_MANT_DIG == DBL_MANT_DIG */