mirror of
https://github.com/intel/linux-sgx
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Li, Xun
70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
/* $OpenBSD: fpclassify.c,v 1.5 2011/05/30 17:28:15 martynas Exp $ */
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/*
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* Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* LINTLIBRARY */
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#include <sys/types.h>
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#include <sys/cdefs.h>
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#include <sys/ieee.h>
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#include <float.h>
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#include <math.h>
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int
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__fpclassify(double d)
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{
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struct ieee_double *p = (struct ieee_double *)&d;
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if (p->dbl_exp == 0) {
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if (p->dbl_frach == 0 && p->dbl_fracl == 0)
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return FP_ZERO;
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else
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return FP_SUBNORMAL;
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}
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if (p->dbl_exp == DBL_EXP_INFNAN) {
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if (p->dbl_frach == 0 && p->dbl_fracl == 0)
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return FP_INFINITE;
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else
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return FP_NAN;
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}
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return FP_NORMAL;
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}
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int
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__fpclassifyf(float f)
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{
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struct ieee_single *p = (struct ieee_single *)&f;
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if (p->sng_exp == 0) {
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if (p->sng_frac == 0)
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return FP_ZERO;
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else
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return FP_SUBNORMAL;
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}
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if (p->sng_exp == SNG_EXP_INFNAN) {
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if (p->sng_frac == 0)
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return FP_INFINITE;
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else
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return FP_NAN;
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}
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return FP_NORMAL;
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}
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