commit long double SoC code from Stathis Kamperis
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christos
parent
e2a86dd3c7
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98b923b685
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/* $NetBSD: s_copysignl.c,v 1.1 2010/09/15 16:12:05 christos Exp $ */
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/*-
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* Copyright (c) 2010 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: s_copysignl.c,v 1.1 2010/09/15 16:12:05 christos Exp $");
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#include <math.h>
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#include <machine/ieee.h>
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/*
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* copysignl(long double x, long double y)
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* This function returns a value with the magnitude of x and the sign of y.
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*/
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long double
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copysignl(long double x, long double y)
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{
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union ieee_ext_u ux, uy;
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ux.extu_ld = x;
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uy.extu_ld = y;
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ux.extu_ext.ext_sign = uy.extu_ext.ext_sign;
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return (ux.extu_ld);
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}
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@ -0,0 +1,47 @@
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/* $NetBSD: s_fabsl.c,v 1.1 2010/09/15 16:12:05 christos Exp $ */
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/*-
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* Copyright (c) 2010 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: s_fabsl.c,v 1.1 2010/09/15 16:12:05 christos Exp $");
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#include <math.h>
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#include <machine/ieee.h>
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/*
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* fabsl(long double x)
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* This function returns the absolute value of its argumetn x, |x|.
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*/
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long double
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fabsl(long double x)
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{
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union ieee_ext_u ux;
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ux.extu_ld = x;
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ux.extu_ext.ext_sign = 0;
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return (ux.extu_ld);
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}
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/* $NetBSD: s_nextafterl.c,v 1.1 2010/09/15 16:12:05 christos Exp $ */
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/* @(#)s_nextafter.c 5.1 93/09/24 */
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: s_nextafterl.c,v 1.1 2010/09/15 16:12:05 christos Exp $");
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#include <float.h>
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#include <math.h>
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#include <machine/ieee.h>
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#if LDBL_MAX_EXP != 0x4000
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#error "Unsupported long double format"
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#endif
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/*
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* IEEE functions
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* nextafterl(x,y)
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* return the next machine floating-point number of x in the
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* direction toward y.
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* Special cases:
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* If x == y, y shall be returned
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* If x or y is NaN, a NaN shall be returned
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*/
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long double
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nextafterl(long double x, long double y)
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{
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volatile long double t;
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union ieee_ext_u ux, uy;
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ux.extu_ld = x;
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uy.extu_ld = y;
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if ((ux.extu_exp == EXT_EXP_NAN &&
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((ux.extu_frach &~ LDBL_NBIT)|ux.extu_fracl) != 0) ||
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(uy.extu_exp == EXT_EXP_NAN &&
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((uy.extu_frach &~ LDBL_NBIT)|uy.extu_fracl) != 0))
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return x+y; /* x or y is nan */
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if (x == y) return y; /* x=y, return y */
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if (x == 0.0) {
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ux.extu_frach = 0; /* return +-minsubnormal */
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ux.extu_fracl = 1;
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ux.extu_sign = uy.extu_sign;
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t = ux.extu_ld * ux.extu_ld;
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if (t == ux.extu_ld)
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return t;
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else
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return ux.extu_ld; /* raise underflow flag */
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}
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if ((x>0.0) ^ (x<y)) { /* x -= ulp */
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if (ux.extu_fracl == 0) {
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if ((ux.extu_frach & ~LDBL_NBIT) == 0)
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ux.extu_exp -= 1;
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ux.extu_frach = (ux.extu_frach - 1) |
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(ux.extu_frach & LDBL_NBIT);
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}
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ux.extu_fracl -= 1;
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} else { /* x += ulp */
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ux.extu_fracl += 1;
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if (ux.extu_fracl == 0) {
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ux.extu_frach = (ux.extu_frach + 1) |
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(ux.extu_frach & LDBL_NBIT);
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if ((ux.extu_frach & ~LDBL_NBIT) == 0)
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ux.extu_exp += 1;
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}
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}
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if (ux.extu_exp == EXT_EXP_INF)
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return x+x; /* overflow */
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if (ux.extu_exp == 0) { /* underflow */
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mask_nbit_l(ux);
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t = ux.extu_ld * ux.extu_ld;
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if (t != ux.extu_ld) /* raise underflow flag */
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return ux.extu_ld;
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}
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return ux.extu_ld;
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}
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/* $NetBSD: s_nexttoward.c,v 1.1 2010/09/15 16:12:05 christos Exp $ */
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/* @(#)s_nextafter.c 5.1 93/09/24 */
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: s_nexttoward.c,v 1.1 2010/09/15 16:12:05 christos Exp $");
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/*
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* We assume that a long double has a 15-bit exponent. On systems
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* where long double is the same as double, nexttoward() is an alias
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* for nextafter(), so we don't use this routine.
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*/
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#include <float.h>
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#include <machine/ieee.h>
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#include "math.h"
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#include "math_private.h"
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#if LDBL_MAX_EXP != 0x4000
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#error "Unsupported long double format"
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#endif
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/*
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* The nexttoward() function is equivalent to nextafter() function,
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* except that the second parameter shall have type long double and
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* the functions shall return y converted to the type of the function
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* if x equals y.
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*
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* Special cases: XXX
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*/
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double
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nexttoward(double x, long double y)
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{
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union ieee_ext_u uy;
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volatile double t;
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int32_t hx, ix;
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uint32_t lx;
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EXTRACT_WORDS(hx, lx, x);
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ix = hx & 0x7fffffff; /* |x| */
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uy.extu_ld = y;
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if (((ix >= 0x7ff00000) && ((ix - 0x7ff00000) | lx) != 0) ||
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(uy.extu_exp == 0x7fff &&
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((uy.extu_frach & ~LDBL_NBIT) | uy.extu_fracl) != 0))
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return x+y; /* x or y is nan */
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if (x == y)
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return (double)y; /* x=y, return y */
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if (x == 0.0) {
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INSERT_WORDS(x, uy.extu_sign<<31, 1); /* return +-minsubnormal */
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t = x*x;
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if (t == x)
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return t;
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else
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return x; /* raise underflow flag */
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}
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if ((hx > 0.0) ^ (x < y)) { /* x -= ulp */
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if (lx == 0) hx -= 1;
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lx -= 1;
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} else { /* x += ulp */
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lx += 1;
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if (lx == 0) hx += 1;
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}
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ix = hx & 0x7ff00000;
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if (ix >= 0x7ff00000) return x+x; /* overflow */
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if (ix < 0x00100000) { /* underflow */
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t = x*x;
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if (t != x) { /* raise underflow flag */
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INSERT_WORDS(y, hx, lx);
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return y;
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}
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}
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INSERT_WORDS(x, hx, lx);
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return x;
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}
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