Importing catanl long double complex method

Importing catanl long double complex method

[Aditya Upadhyay]

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Hello All,

I had ported ctanl long double complex method from NetBSD, But forgot
to change the line
w = HUGE_VALF + HUGE_VALF * I; to w = HUGE_VALL + HUGE_VALL * I;

I have fixed it and sent it as [PATCH 2/2]. I was sending the [PATCH
1/2] for catanl using git send-email but do know why i am not able to
send it. So i am attaching this patch here. Please review the same.

Thanks & Regards,
Aditya Upadhyay

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From 6ba631592044b28dea5584483fc15a84e5ed172b Mon Sep 17 00:00:00 2001
From: Aditya Upadhyay <aadit0402@gmail.com>
Date: Fri, 28 Jul 2017 22:59:40 +0530
Subject: [PATCH 1/2] Importing catanl long double complex method from NetBSD.

---
 newlib/libm/complex/Makefile.am |  2 +-
 newlib/libm/complex/catanl.c    | 77 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+), 1 deletion(-)
 create mode 100644 newlib/libm/complex/catanl.c

diff --git a/newlib/libm/complex/Makefile.am b/newlib/libm/complex/Makefile.am
index 47b966216..897774197 100644
--- a/newlib/libm/complex/Makefile.am
+++ b/newlib/libm/complex/Makefile.am
@@ -14,7 +14,7 @@ lsrc = cabsl.c creall.c cimagl.c ccoshl.c cacoshl.c \
        clogl.c csqrtl.c cargl.c cprojl.c cexpl.c \
        cephes_subrl.c cacosl.c ccosl.c casinl.c \
        catanhl.c conjl.c cpowl.c ctanhl.c ctanl.c \
-       casinhl.c csinhl.c csinl.c
+       casinhl.c csinhl.c csinl.c catanl.c
 
 fsrc =	cabsf.c casinf.c ccosf.c cimagf.c cprojf.c  \
         csqrtf.c cacosf.c casinhf.c ccoshf.c clogf.c clog10f.c \
diff --git a/newlib/libm/complex/catanl.c b/newlib/libm/complex/catanl.c
new file mode 100644
index 000000000..ee2a25930
--- /dev/null
+++ b/newlib/libm/complex/catanl.c
@@ -0,0 +1,77 @@
+/* $NetBSD: catanl.c,v 1.1 2014/10/10 00:48:18 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"
+
+#ifdef __weak_alias
+__weak_alias(catanl, _catanl)
+#endif
+
+long double complex
+catanl(long double complex z)
+{
+	long double complex w;
+	long double a, t, x, x2, y;
+
+	x = creall(z);
+	y = cimagl(z);
+
+	if ((x == 0.0L) && (y > 1.0L))
+		goto ovrf;
+
+	x2 = x * x;
+	a = 1.0L - x2 - (y * y);
+	if (a == 0.0)
+		goto ovrf;
+
+	t = 0.5L * atan2l(2.0L * x, a);
+	w = _redupil(t);
+
+	t = y - 1.0L;
+	a = x2 + (t * t);
+	if (a == 0.0L)
+		goto ovrf;
+
+	t = y + 1.0L;
+	a = (x2 + (t * t))/a;
+	w = w + (0.25L * logl(a)) * I;
+	return w;
+
+ovrf:
+#if 0
+	mtherr ("catanl", OVERFLOW);
+#endif
+	w = HUGE_VALL + HUGE_VALL * I;
+	return w;
+}
+
-- 
2.13.0

Re: Importing catanl long double complex method

[Corinna Vinschen]

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On Jul 28 23:12, Aditya Upadhyay wrote:
> Hello All,
> 
> I had ported ctanl long double complex method from NetBSD, But forgot
> to change the line
> w = HUGE_VALF + HUGE_VALF * I; to w = HUGE_VALL + HUGE_VALL * I;
> 
> I have fixed it and sent it as [PATCH 2/2]. I was sending the [PATCH
> 1/2] for catanl using git send-email but do know why i am not able to
> send it. So i am attaching this patch here. Please review the same.

Pushed.


Thanks,
Corinna

-- 
Corinna Vinschen
Cygwin Maintainer
Red Hat

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