1 /*
2 Copyright (c) 2007 The NetBSD Foundation, Inc.
3 All rights reserved.
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions
7 are met:
8 1. Redistributions of source code must retain the above copyright
9 notice, this list of conditions and the following disclaimer.
10 2. Redistributions in binary form must reproduce the above copyright
11 notice, this list of conditions and the following disclaimer in the
12 documentation and/or other materials provided with the distribution.
13
14 THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
15 AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
16 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
18 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 POSSIBILITY OF SUCH DAMAGE.
25 */
26 /* $NetBSD: conj.c,v 1.2 2010/09/15 16:11:29 christos Exp $ */
27
28 /*
29 * Written by Matthias Drochner <drochner@NetBSD.org>.
30 * Public domain.
31 *
32 * imported and modified include for newlib 2010/10/03
33 * Marco Atzeri <marco_atzeri@yahoo.it>
34 */
35
36 /*
37 FUNCTION
38 <<conj>>, <<conjf>>---complex conjugate
39
40 INDEX
41 conj
42 INDEX
43 conjf
44
45 SYNOPSIS
46 #include <complex.h>
47 double complex conj(double complex <[z]>);
48 float complex conjf(float complex <[z]>);
49
50
51 DESCRIPTION
52 These functions compute the complex conjugate of <[z]>,
53 by reversing the sign of its imaginary part.
54
55 <<conjf>> is identical to <<conj>>, except that it performs
56 its calculations on <<floats complex>>.
57
58 RETURNS
59 The conj functions return the complex conjugate value.
60
61 PORTABILITY
62 <<conj>> and <<conjf>> are ISO C99
63
64 QUICKREF
65 <<conj>> and <<conjf>> are ISO C99
66
67 */
68
69 #include <complex.h>
70 #include "../common/fdlibm.h"
71
72 double complex
conj(double complex z)73 conj(double complex z)
74 {
75 double_complex w = { .z = z };
76
77 IMAG_PART(w) = -IMAG_PART(w);
78
79 return (w.z);
80 }
81
