Adding cephes_subrl.h and cephes_subrl.c from NetBSD.
This commit is contained in:
Aditya Upadhyay
committed by
Corinna Vinschen
Corinna Vinschen
parent
b1b12e1e00
commit
eee8294c42
@@ -11,7 +11,8 @@ src = cabs.c cacos.c cacosh.c carg.c casin.c casinh.c \
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csin.c csinh.c csqrt.c ctan.c ctanh.c
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lsrc = cabsl.c creall.c cimagl.c ccoshl.c cacoshl.c \
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clogl.c csqrtl.c cargl.c cprojl.c cexpl.c
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clogl.c csqrtl.c cargl.c cprojl.c cexpl.c \
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cephes_subrl.c
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fsrc = cabsf.c casinf.c ccosf.c cimagf.c cprojf.c \
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csqrtf.c cacosf.c casinhf.c ccoshf.c clogf.c clog10f.c \
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@@ -44,4 +45,4 @@ CHAPTERS = complex.tex
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# A partial dependency list.
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$(lib_a_OBJECTS): $(srcdir)/../../libc/include/complex.h $(srcdir)/cephes_subr.h $(srcdir)/cephes_subrf.h
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$(lib_a_OBJECTS): $(srcdir)/../../libc/include/complex.h $(srcdir)/cephes_subr.h $(srcdir)/cephes_subrf.h $(srcdir)/cephes_subrl.h
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128
newlib/libm/complex/cephes_subrl.c
Executable file
128
newlib/libm/complex/cephes_subrl.c
Executable file
@@ -0,0 +1,128 @@
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/* $NetBSD: cephes_subrl.c,v 1.2 2014/10/10 14:06:40 christos Exp $ */
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/*-
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* Copyright (c) 2007 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software written by Stephen L. Moshier.
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* It is redistributed by the NetBSD Foundation by permission of the author.
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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 <complex.h>
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#include <math.h>
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#include "cephes_subrl.h"
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/* calculate cosh and sinh */
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void
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_cchshl(long double x, long double *c, long double *s)
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{
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long double e, ei;
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if (fabsl(x) <= 0.5L) {
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*c = coshl(x);
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*s = sinhl(x);
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} else {
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e = expl(x);
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ei = 0.5L / e;
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e = 0.5L * e;
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*s = e - ei;
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*c = e + ei;
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}
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}
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/* Program to subtract nearest integer multiple of PI */
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/* extended precision value of PI: */
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static const long double DP1 = 3.14159265358979323829596852490908531763125L;
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static const long double DP2 = 1.6667485837041756656403424829301998703007e-19L;
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#ifndef __vax__
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static const long double DP3 = 1.8830410776607851167459095484560349402753e-39L;
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#define MACHEPL 1.1e-38L
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#else
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static const long double DP3 = 0L;
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#define MACHEPL 1.1e-19L
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#endif
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long double
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_redupil(long double x)
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{
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long double t;
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long long i;
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t = x / M_PIL;
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if (t >= 0.0L)
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t += 0.5L;
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else
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t -= 0.5L;
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i = t; /* the multiple */
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t = i;
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t = ((x - t * DP1) - t * DP2) - t * DP3;
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return t;
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}
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/* Taylor series expansion for cosh(2y) - cos(2x) */
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long double
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_ctansl(long double complex z)
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{
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long double f, x, x2, y, y2, rn, t;
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long double d;
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x = fabsl(2.0L * creall(z));
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y = fabsl(2.0L * cimagl(z));
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x = _redupil(x);
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x = x * x;
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y = y * y;
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x2 = 1.0;
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y2 = 1.0;
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f = 1.0;
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rn = 0.0;
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d = 0.0;
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do {
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rn += 1.0L;
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f *= rn;
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rn += 1.0L;
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f *= rn;
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x2 *= x;
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y2 *= y;
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t = y2 + x2;
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t /= f;
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d += t;
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rn += 1.0L;
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f *= rn;
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rn += 1.0L;
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f *= rn;
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x2 *= x;
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y2 *= y;
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t = y2 - x2;
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t /= f;
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d += t;
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} while (fabsl(t/d) > MACHEPL);
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return d;
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}
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9
newlib/libm/complex/cephes_subrl.h
Executable file
9
newlib/libm/complex/cephes_subrl.h
Executable file
@@ -0,0 +1,9 @@
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/* $NetBSD: cephes_subrl.h,v 1.1 2014/10/10 00:48:18 christos Exp $ */
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void _cchshl(long double, long double *, long double *);
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long double _redupil(long double);
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long double _ctansl(long double complex);
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#define M_PIL 3.14159265358979323846264338327950280e+00L
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#define M_PI_2L 1.57079632679489661923132169163975140e+00L
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