[newlib-cygwin] Adding cephes_subrl.h and cephes_subrl.c from NetBSD.
Corinna Vinschen
corinna@sourceware.org
Thu Jun 29 12:04:00 GMT 2017
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=eee8294c428b40566d25818a5f636be26d6e94e7
commit eee8294c428b40566d25818a5f636be26d6e94e7
Author: Aditya Upadhyay <aadit0402@gmail.com>
Date: Thu Jun 29 01:34:23 2017 +0530
Adding cephes_subrl.h and cephes_subrl.c from NetBSD.
Diff:
---
newlib/libm/complex/Makefile.am | 5 +-
newlib/libm/complex/cephes_subrl.c | 128 +++++++++++++++++++++++++++++++++++++
newlib/libm/complex/cephes_subrl.h | 9 +++
3 files changed, 140 insertions(+), 2 deletions(-)
diff --git a/newlib/libm/complex/Makefile.am b/newlib/libm/complex/Makefile.am
index 6eaa685..06706ea 100644
--- a/newlib/libm/complex/Makefile.am
+++ b/newlib/libm/complex/Makefile.am
@@ -11,7 +11,8 @@ src = cabs.c cacos.c cacosh.c carg.c casin.c casinh.c \
csin.c csinh.c csqrt.c ctan.c ctanh.c
lsrc = cabsl.c creall.c cimagl.c ccoshl.c cacoshl.c \
- clogl.c csqrtl.c cargl.c cprojl.c cexpl.c
+ clogl.c csqrtl.c cargl.c cprojl.c cexpl.c \
+ cephes_subrl.c
fsrc = cabsf.c casinf.c ccosf.c cimagf.c cprojf.c \
csqrtf.c cacosf.c casinhf.c ccoshf.c clogf.c clog10f.c \
@@ -44,4 +45,4 @@ CHAPTERS = complex.tex
# A partial dependency list.
-$(lib_a_OBJECTS): $(srcdir)/../../libc/include/complex.h $(srcdir)/cephes_subr.h $(srcdir)/cephes_subrf.h
+$(lib_a_OBJECTS): $(srcdir)/../../libc/include/complex.h $(srcdir)/cephes_subr.h $(srcdir)/cephes_subrf.h $(srcdir)/cephes_subrl.h
diff --git a/newlib/libm/complex/cephes_subrl.c b/newlib/libm/complex/cephes_subrl.c
new file mode 100755
index 0000000..8af11df
--- /dev/null
+++ b/newlib/libm/complex/cephes_subrl.c
@@ -0,0 +1,128 @@
+/* $NetBSD: cephes_subrl.c,v 1.2 2014/10/10 14:06:40 christos Exp $ */
+
+/*-
+ * Copyright (c) 2007 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software written by Stephen L. Moshier.
+ * It is redistributed by the NetBSD Foundation by permission of the author.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <complex.h>
+#include <math.h>
+#include "cephes_subrl.h"
+
+/* calculate cosh and sinh */
+
+void
+_cchshl(long double x, long double *c, long double *s)
+{
+ long double e, ei;
+
+ if (fabsl(x) <= 0.5L) {
+ *c = coshl(x);
+ *s = sinhl(x);
+ } else {
+ e = expl(x);
+ ei = 0.5L / e;
+ e = 0.5L * e;
+ *s = e - ei;
+ *c = e + ei;
+ }
+}
+
+/* Program to subtract nearest integer multiple of PI */
+
+/* extended precision value of PI: */
+static const long double DP1 = 3.14159265358979323829596852490908531763125L;
+static const long double DP2 = 1.6667485837041756656403424829301998703007e-19L;
+#ifndef __vax__
+static const long double DP3 = 1.8830410776607851167459095484560349402753e-39L;
+#define MACHEPL 1.1e-38L
+#else
+static const long double DP3 = 0L;
+#define MACHEPL 1.1e-19L
+#endif
+
+long double
+_redupil(long double x)
+{
+ long double t;
+ long long i;
+
+ t = x / M_PIL;
+ if (t >= 0.0L)
+ t += 0.5L;
+ else
+ t -= 0.5L;
+
+ i = t; /* the multiple */
+ t = i;
+ t = ((x - t * DP1) - t * DP2) - t * DP3;
+ return t;
+}
+
+/* Taylor series expansion for cosh(2y) - cos(2x) */
+
+long double
+_ctansl(long double complex z)
+{
+ long double f, x, x2, y, y2, rn, t;
+ long double d;
+
+ x = fabsl(2.0L * creall(z));
+ y = fabsl(2.0L * cimagl(z));
+
+ x = _redupil(x);
+
+ x = x * x;
+ y = y * y;
+ x2 = 1.0;
+ y2 = 1.0;
+ f = 1.0;
+ rn = 0.0;
+ d = 0.0;
+ do {
+ rn += 1.0L;
+ f *= rn;
+ rn += 1.0L;
+ f *= rn;
+ x2 *= x;
+ y2 *= y;
+ t = y2 + x2;
+ t /= f;
+ d += t;
+
+ rn += 1.0L;
+ f *= rn;
+ rn += 1.0L;
+ f *= rn;
+ x2 *= x;
+ y2 *= y;
+ t = y2 - x2;
+ t /= f;
+ d += t;
+ } while (fabsl(t/d) > MACHEPL);
+ return d;
+}
diff --git a/newlib/libm/complex/cephes_subrl.h b/newlib/libm/complex/cephes_subrl.h
new file mode 100755
index 0000000..6354b23
--- /dev/null
+++ b/newlib/libm/complex/cephes_subrl.h
@@ -0,0 +1,9 @@
+/* $NetBSD: cephes_subrl.h,v 1.1 2014/10/10 00:48:18 christos Exp $ */
+
+void _cchshl(long double, long double *, long double *);
+long double _redupil(long double);
+long double _ctansl(long double complex);
+
+#define M_PIL 3.14159265358979323846264338327950280e+00L
+#define M_PI_2L 1.57079632679489661923132169163975140e+00L
+
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