Mercurial > nand-ecoscentric

annotate packages/language/c/libm/current/src/complex/cacosh.c @ 3403:8c8767bb9a62 default tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
devs/nand/micron_mt29: Remove defunct references (in comments) to mt29f2g08_oob_ecc.
author Ross Younger <wry@ecoscentric.com>
date Sun, 18 Jan 2015 17:59:01 +1300
parents 77f9d3253c3e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3337
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
1 /* $NetBSD: cacosh.c,v 1.2 2009/08/03 19:41:32 drochner Exp $ */
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
2
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
3 /*-
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
5 * All rights reserved.
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
6 *
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
7 * This code is derived from software written by Stephen L. Moshier.
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
8 * It is redistributed by the NetBSD Foundation by permission of the author.
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
9 *
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
10 * Redistribution and use in source and binary forms, with or without
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
11 * modification, are permitted provided that the following conditions
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
12 * are met:
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
13 * 1. Redistributions of source code must retain the above copyright
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
14 * notice, this list of conditions and the following disclaimer.
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
15 * 2. Redistributions in binary form must reproduce the above copyright
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
16 * notice, this list of conditions and the following disclaimer in the
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
17 * documentation and/or other materials provided with the distribution.
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
18 *
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
29 * POSSIBILITY OF SUCH DAMAGE.
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
30 *
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
31 * imported and modified include for newlib 2010/10/03
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
32 * Marco Atzeri <marco_atzeri@yahoo.it>
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
33 */
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
34
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
35 /*
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
36 FUNCTION
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
37 <<cacosh>>, <<cacoshf>>---complex arc hyperbolic cosine
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
38
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
39 INDEX
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
40 cacosh
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
41 INDEX
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
42 cacoshf
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
43
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
44 ANSI_SYNOPSIS
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
45 #include <complex.h>
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
46 double complex cacosh(double complex <[z]>);
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
47 float complex cacoshf(float complex <[z]>);
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
48
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
49
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
50 DESCRIPTION
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
51 These functions compute the complex arc hyperbolic cosine of <[z]>,
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
52 with a branch cut at values less than 1 along the real axis.
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
53
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
54 <<cacoshf>> is identical to <<cacosh>>, except that it performs
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
55 its calculations on <<floats complex>>.
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
56
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
57 RETURNS
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
58 @ifnottex
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
59 These functions return the complex arc hyperbolic cosine value,
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
60 in the range of a half-strip of non-negative values along the
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
61 real axis and in the interval [-i * pi, +i * pi] along the
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
62 imaginary axis.
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
63 @end ifnottex
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
64 @tex
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
65 These functions return the complex arc hyperbolic cosine value,
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
66 in the range of a half-strip of non-negative values along the
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
67 real axis and in the interval [$-i\pi$, $+i\pi$] along the
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
68 imaginary axis.
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
69 @end tex
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
70
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
71 PORTABILITY
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
72 <<cacosh>> and <<cacoshf>> are ISO C99
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
73
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
74 QUICKREF
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
75 <<cacosh>> and <<cacoshf>> are ISO C99
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
76
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
77 */
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
78
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
79
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
80 #include <complex.h>
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
81
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
82 double complex
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
83 cacosh(double complex z)
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
84 {
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
85 double complex w;
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
86
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
87 #if 0 /* does not give the principal value */
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
88 w = I * cacos(z);
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
89 #else
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
90 w = clog(z + csqrt(z + 1) * csqrt(z - 1));
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
91 #endif
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
92 return w;
77f9d3253c3e Add: Complex number header and library (single and double precision floating point),
vae
parents:
diff changeset
93 }