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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libm/src/s_ccosf.c	Lines:	0	12	0.0 %
Date:	2017-11-07	Branches:	0	2	0.0 %


/*	$OpenBSD: s_ccosf.c,v 1.2 2010/07/18 18:42:26 guenther Exp $	*/
/*
 * Copyright (c) 2008 Stephen L. Moshier <steve@moshier.net>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*							ccosf()
 *
 *	Complex circular cosine
 *
 *
 *
 * SYNOPSIS:
 *
 * void ccosf();
 * cmplxf z, w;
 *
 * ccosf( &z, &w );
 *
 *
 *
 * DESCRIPTION:
 *
 * If
 *     z = x + iy,
 *
 * then
 *
 *     w = cos x  cosh y  -  i sin x sinh y.
 *
 *
 *
 * ACCURACY:
 *
 *                      Relative error:
 * arithmetic   domain     # trials      peak         rms
 *    IEEE      -10,+10     30000       1.8e-7       5.5e-8
 */

#include <complex.h>
#include <math.h>

/* calculate cosh and sinh */

static void
_cchshf(float xx, float *c, float *s)
{
	float x, e, ei;

	x = xx;
	if(fabsf(x) <= 0.5f) {
		*c = coshf(x);
		*s = sinhf(x);
	}
	else {
		e = expf(x);
		ei = 0.5f/e;
		e = 0.5f * e;
		*s = e - ei;
		*c = e + ei;
	}
}

float complex
ccosf(float complex z)
{
	float complex w;
	float ch, sh;

	_cchshf( cimagf(z), &ch, &sh );
	w = cosf( crealf(z) ) * ch + ( -sinf( crealf(z) ) * sh) * I;
	return (w);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: s_ccosf.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			/* ccosf()
19			*
20			* Complex circular cosine
21			*
22			*
23			*
24			* SYNOPSIS:
25			*
26			* void ccosf();
27			* cmplxf z, w;
28			*
29			* ccosf( &z, &w );
30			*
31			*
32			*
33			* DESCRIPTION:
34			*
35			* If
36			* z = x + iy,
37			*
38			* then
39			*
40			* w = cos x cosh y - i sin x sinh y.
41			*
42			*
43			*
44			* ACCURACY:
45			*
46			* Relative error:
47			* arithmetic domain # trials peak rms
48			* IEEE -10,+10 30000 1.8e-7 5.5e-8
49			*/
50
51			#include <complex.h>
52			#include <math.h>
53
54			/* calculate cosh and sinh */
55
56			static void
57			_cchshf(float xx, float c, float s)
58			{
59			float x, e, ei;
60
61			x = xx;
62			if(fabsf(x) <= 0.5f) {
63			*c = coshf(x);
64			*s = sinhf(x);
65			}
66			else {
67			e = expf(x);
68			ei = 0.5f/e;
69			e = 0.5f * e;
70			*s = e - ei;
71			*c = e + ei;
72			}
73			}
74
75			float complex
76			ccosf(float complex z)
77			{
78			float complex w;
79			float ch, sh;
80
81			_cchshf( cimagf(z), &ch, &sh );
82			w = cosf( crealf(z) ) * ch + ( -sinf( crealf(z) ) * sh) * I;
83			return (w);
84			}