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- Replaced ISO Latin 1 code #160 with a plain blank space (ASCII code #32) where necessary git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15305 87f5fb63-7c3d-0410-a384-fd976d0f7a62
97 lines
3.0 KiB
C
97 lines
3.0 KiB
C
/*
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* $Id: math_hypotf.c,v 1.3 2006-01-08 12:04:23 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
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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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*
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* - 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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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* 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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*
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* PowerPC math library based in part on work by Sun Microsystems
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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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* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
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*/
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#ifndef _MATH_HEADERS_H
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#include "math_headers.h"
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#endif /* _MATH_HEADERS_H */
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/****************************************************************************/
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#if defined(FLOATING_POINT_SUPPORT)
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/****************************************************************************/
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#define SQRT_FLT_MAX 1.84467429742e+19 /* 0x5f7fffff */
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float
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hypotf(float x, float y)
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{
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float a=x,b=y,t1,t2,w;
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LONG j,ha,hb;
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if (isunordered(x,y))
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return (x-x)/(y-y);
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if (!isfinite(x) || !isfinite(y)) {
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__set_errno(ERANGE);
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return __get_huge_valf();
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}
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GET_FLOAT_WORD(ha,x);
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ha &= 0x7fffffff;
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GET_FLOAT_WORD(hb,y);
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hb &= 0x7fffffff;
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if(hb < ha) {a=y;b=x;j=ha; ha=hb;hb=j;} else {a=x;b=y;}
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SET_FLOAT_WORD(a,ha); /* a <- |a| */
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SET_FLOAT_WORD(b,hb); /* b <- |b| */
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t1 = (a > 0) ? (a/b) : 0;
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if ((t1 >= SQRT_FLT_MAX) && isfinite(x) && isfinite(y)) {
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__set_errno(ERANGE);
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return __get_huge_valf();
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}
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t1 *= t1;
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t2 = sqrtf(++t1);
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if ((t2 > 1) && (b >= FLT_MAX)) {
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__set_errno(ERANGE);
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return __get_huge_valf();
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}
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w = t2 * b;
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return w;
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}
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/****************************************************************************/
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#endif /* FLOATING_POINT_SUPPORT */
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