GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libm/src/s_cexpf.c Lines: 0 3 0.0 %
Date: 2017-11-13 Branches: 0 0 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: s_cexpf.c,v 1.2 2010/07/18 18:42:26 guenther Exp $	*/
2
/*
3
 * Copyright (c) 2008 Stephen L. Moshier <steve@moshier.net>
4
 *
5
 * Permission to use, copy, modify, and distribute this software for any
6
 * purpose with or without fee is hereby granted, provided that the above
7
 * copyright notice and this permission notice appear in all copies.
8
 *
9
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16
 */
17
18
/*							cexpf()
19
 *
20
 *	Complex exponential function
21
 *
22
 *
23
 *
24
 * SYNOPSIS:
25
 *
26
 * void cexpf();
27
 * cmplxf z, w;
28
 *
29
 * cexpf( &z, &w );
30
 *
31
 *
32
 *
33
 * DESCRIPTION:
34
 *
35
 * Returns the exponential of the complex argument z
36
 * into the complex result w.
37
 *
38
 * If
39
 *     z = x + iy,
40
 *     r = exp(x),
41
 *
42
 * then
43
 *
44
 *     w = r cos y + i r sin y.
45
 *
46
 *
47
 * ACCURACY:
48
 *
49
 *                      Relative error:
50
 * arithmetic   domain     # trials      peak         rms
51
 *    IEEE      -10,+10     30000       1.4e-7      4.5e-8
52
 *
53
 */
54
55
#include <complex.h>
56
#include <math.h>
57
58
float complex
59
cexpf(float complex z)
60
{
61
	float complex w;
62
	float r;
63
64
	r = expf( crealf(z) );
65
	w = r * cosf( cimagf(z) ) +  r * sinf( cimagf(z) ) * I;
66
	return (w);
67
}