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git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14685 87f5fb63-7c3d-0410-a384-fd976d0f7a62
187 lines
4.6 KiB
C
187 lines
4.6 KiB
C
/*
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* $Id: math_sin.c,v 1.1.1.1 2004-07-26 16:30:52 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) 2002-2004 by Olaf Barthel <olsen@sourcery.han.de>
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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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#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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#if defined(IEEE_FLOATING_POINT_SUPPORT)
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/****************************************************************************/
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#if defined(__GNUC__)
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/****************************************************************************/
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#if defined(SMALL_DATA)
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#define A4(x) "a4@(" #x ":W)"
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#elif defined(SMALL_DATA32)
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#define A4(x) "a4@(" #x ":L)"
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#else
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#define A4(x) #x
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#endif /* SMALL_DATA */
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/****************************************************************************/
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extern double __sin(double x);
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/****************************************************************************/
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asm("
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.text
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.even
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.globl _MathIeeeDoubTransBase
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.globl ___sin
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___sin:
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movel a6,sp@-
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movel "A4(_MathIeeeDoubTransBase)",a6
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moveml sp@(8),d0/d1
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jsr a6@(-36:W)
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movel sp@+,a6
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rts
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");
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/****************************************************************************/
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#else
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/****************************************************************************/
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INLINE static const double
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__sin(double x)
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{
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double result;
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result = IEEEDPSin(x);
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return(result);
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}
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/****************************************************************************/
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#endif /* __GNUC__ */
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/****************************************************************************/
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#endif /* IEEE_FLOATING_POINT_SUPPORT */
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/****************************************************************************/
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#if defined(M68881_FLOATING_POINT_SUPPORT)
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INLINE static const double
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__sin(double x)
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{
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double result;
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__asm ("fsin%.x %1,%0"
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: "=f" (result)
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: "f" (x));
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return(result);
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}
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#endif /* M68881_FLOATING_POINT_SUPPORT */
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/****************************************************************************/
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#if defined(PPC_FLOATING_POINT_SUPPORT)
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INLINE static const double
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__sin(double x)
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{
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double y[2],z=0.0;
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int n,ix;
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/* High word of x. */
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GET_HIGH_WORD(ix,x);
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/* |x| ~< pi/4 */
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ix &= 0x7fffffff;
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if(ix <= 0x3fe921fb)
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return __kernel_sin(x,z,0);
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/* sin(Inf or NaN) is NaN */
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else if (ix>=0x7ff00000) return x-x;
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/* argument reduction needed */
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else {
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n = __rem_pio2(x,y);
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switch(n&3) {
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case 0: return __kernel_sin(y[0],y[1],1);
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case 1: return __kernel_cos(y[0],y[1]);
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case 2: return -__kernel_sin(y[0],y[1],1);
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default:
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return -__kernel_cos(y[0],y[1]);
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}
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}
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}
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#endif /* PPC_FLOATING_POINT_SUPPORT */
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/****************************************************************************/
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double
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sin(double x)
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{
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double result;
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result = __sin(x);
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return(result);
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}
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/****************************************************************************/
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#endif /* FLOATING_POINT_SUPPORT */
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