[mirror_edk2.git] / StdLib / LibC / Main / isnanf_ieee754.c

/*  $NetBSD: isnanf_ieee754.c,v 1.1 2004/03/04 23:42:39 kleink Exp $  */\r
\r
/*\r
 * Copyright (c) 1992, 1993\r
 *  The Regents of the University of California.  All rights reserved.\r
 *\r
 * This software was developed by the Computer Systems Engineering group\r
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and\r
 * contributed to Berkeley.\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 * 3. Neither the name of the University nor the names of its contributors\r
 *    may be used to endorse or promote products derived from this software\r
 *    without specific prior written permission.\r
 *\r
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
 * SUCH DAMAGE.\r
 *\r
 * from: Header: isinf.c,v 1.1 91/07/08 19:03:34 torek Exp\r
 */\r
#include  <LibConfig.h>\r
#include <sys/EfiCdefs.h>\r
#if defined(LIBC_SCCS) && !defined(lint)\r
#if 0\r
static char sccsid[] = "@(#)isinf.c 8.1 (Berkeley) 6/4/93";\r
#else\r
__RCSID("$NetBSD: isnanf_ieee754.c,v 1.1 2004/03/04 23:42:39 kleink Exp $");\r
#endif\r
#endif /* LIBC_SCCS and not lint */\r
\r
#include <machine/ieee.h>\r
#include <math.h>\r
\r
/*\r
 * 7.12.3.4 isnan - test for a NaN\r
 *          IEEE 754 single-precision version\r
 */\r
int\r
__isnanf(float x)\r
{\r
  union ieee_single_u u;\r
\r
  u.sngu_f = x;\r
\r
  return (u.sngu_sng.sng_exp == SNG_EXP_INFNAN &&\r
      u.sngu_sng.sng_frac != 0);\r
}\r
Commit	Line	Data
2aa62f2b	1	/* $NetBSD: isnanf_ieee754.c,v 1.1 2004/03/04 23:42:39 kleink Exp $ */\r
	2	\r
	3	/*\r
	4	* Copyright (c) 1992, 1993\r
	5	* The Regents of the University of California. All rights reserved.\r
	6	*\r
	7	* This software was developed by the Computer Systems Engineering group\r
	8	* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and\r
	9	* contributed to Berkeley.\r
	10	*\r
	11	* Redistribution and use in source and binary forms, with or without\r
	12	* modification, are permitted provided that the following conditions\r
	13	* are met:\r
	14	* 1. Redistributions of source code must retain the above copyright\r
	15	* notice, this list of conditions and the following disclaimer.\r
	16	* 2. Redistributions in binary form must reproduce the above copyright\r
	17	* notice, this list of conditions and the following disclaimer in the\r
	18	* documentation and/or other materials provided with the distribution.\r
	19	* 3. Neither the name of the University nor the names of its contributors\r
	20	* may be used to endorse or promote products derived from this software\r
	21	* without specific prior written permission.\r
	22	*\r
	23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r
	24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
	28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
	29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
	30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
	31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
	32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
	33	* SUCH DAMAGE.\r
	34	*\r
	35	* from: Header: isinf.c,v 1.1 91/07/08 19:03:34 torek Exp\r
	36	*/\r
	37	#include <LibConfig.h>\r
	38	#include <sys/EfiCdefs.h>\r
	39	#if defined(LIBC_SCCS) && !defined(lint)\r
	40	#if 0\r
	41	static char sccsid[] = "@(#)isinf.c 8.1 (Berkeley) 6/4/93";\r
	42	#else\r
	43	__RCSID("$NetBSD: isnanf_ieee754.c,v 1.1 2004/03/04 23:42:39 kleink Exp $");\r
	44	#endif\r
	45	#endif /* LIBC_SCCS and not lint */\r
	46	\r
	47	#include <machine/ieee.h>\r
	48	#include <math.h>\r
	49	\r
	50	/*\r
	51	* 7.12.3.4 isnan - test for a NaN\r
	52	* IEEE 754 single-precision version\r
	53	*/\r
	54	int\r
	55	__isnanf(float x)\r
	56	{\r
	57	union ieee_single_u u;\r
	58	\r
	59	u.sngu_f = x;\r
	60	\r
	61	return (u.sngu_sng.sng_exp == SNG_EXP_INFNAN &&\r
	62	u.sngu_sng.sng_frac != 0);\r
	63	}\r