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GCC Code Coverage Report

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


/*	$OpenBSD: s_csinf.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.
 */

/*							csinf()
 *
 *	Complex circular sine
 *
 *
 *
 * SYNOPSIS:
 *
 * void csinf();
 * cmplxf z, w;
 *
 * csinf( &z, &w );
 *
 *
 *
 * DESCRIPTION:
 *
 * If
 *     z = x + iy,
 *
 * then
 *
 *     w = sin x  cosh y  +  i cos x sinh y.
 *
 *
 *
 * ACCURACY:
 *
 *                      Relative error:
 * arithmetic   domain     # trials      peak         rms
 *    IEEE      -10,+10     30000       1.9e-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
csinf(float complex z)
{
	float complex w;
	float ch, sh;

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


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: s_csinf.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			/* csinf()
19			*
20			* Complex circular sine
21			*
22			*
23			*
24			* SYNOPSIS:
25			*
26			* void csinf();
27			* cmplxf z, w;
28			*
29			* csinf( &z, &w );
30			*
31			*
32			*
33			* DESCRIPTION:
34			*
35			* If
36			* z = x + iy,
37			*
38			* then
39			*
40			* w = sin x cosh y + i cos x sinh y.
41			*
42			*
43			*
44			* ACCURACY:
45			*
46			* Relative error:
47			* arithmetic domain # trials peak rms
48			* IEEE -10,+10 30000 1.9e-7 5.5e-8
49			*
50			*/
51
52			#include <complex.h>
53			#include <math.h>
54
55			/* calculate cosh and sinh */
56
57			static void
58			cchshf(float xx, float c, float s)
59			{
60			float x, e, ei;
61
62			x = xx;
63			if(fabsf(x) <= 0.5f) {
64			*c = coshf(x);
65			*s = sinhf(x);
66			}
67			else {
68			e = expf(x);
69			ei = 0.5f/e;
70			e = 0.5f * e;
71			*s = e - ei;
72			*c = e + ei;
73			}
74			}
75
76			float complex
77			csinf(float complex z)
78			{
79			float complex w;
80			float ch, sh;
81
82			cchshf(cimagf(z), &ch, &sh);
83			w = sinf(crealf(z)) * ch + (cosf(crealf(z)) * sh) * I;
84			return (w);
85			}