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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 77f9d3253c3e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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3260
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1 /* $NetBSD: cproj.c,v 1.3 2010/09/20 17:51:38 christos Exp $ */
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2
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3 /*-
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4 * Copyright (c) 2010 The NetBSD Foundation, Inc.
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5 * All rights reserved.
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6 *
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7 * Redistribution and use in source and binary forms, with or without
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8 * modification, are permitted provided that the following conditions
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9 * are met:
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10 * 1. Redistributions of source code must retain the above copyright
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11 * notice, this list of conditions and the following disclaimer.
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 *
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28 * imported and modified include for newlib 2010/10/03
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29 * Marco Atzeri <marco_atzeri@yahoo.it>
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30 */
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31
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32 /*
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33 FUNCTION
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34 <<cproj>>, <<cprojf>>--- Riemann sphere projection
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35
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36 INDEX
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37 cproj
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38 INDEX
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39 cprojf
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40
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41 ANSI_SYNOPSIS
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42 #include <complex.h>
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43 double complex cproj(double complex <[z]>);
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44 float complex cprojf(float complex <[z]>);
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45
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46
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47 DESCRIPTION
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48 These functions compute a projection of <[z]> onto the Riemann
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49 sphere: <[z]> projects to <[z]> except that all complex infinities
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50 (even those with one infinite part and one NaN part) project
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51 to positive infinity on the real axis. If <[z]> has an infinite part,
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52 then <<cproj>>(<[z]>) is equivalent to
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53
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54 INFINITY + I * copysign(0.0, cimag(z))
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55
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56 <<cprojf>> is identical to <<cproj>>, except that it performs
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57 its calculations on <<floats complex>>.
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58
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59 RETURNS
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60 The cproj functions return the value of the projection onto
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61 the Riemann sphere.
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62
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63 PORTABILITY
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64 <<cproj>> and <<cprojf>> are ISO C99
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65
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66 QUICKREF
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67 <<cproj>> and <<cprojf>> are ISO C99
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68
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69 */
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70
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71 //#include <sys/cdefs.h>
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72 /*__RCSID("$NetBSD: cproj.c,v 1.3 2010/09/20 17:51:38 christos Exp $"); */
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73
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74 #include <complex.h>
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75 #include <math.h>
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76
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77 #include "../mathincl/fdlibm.h"
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78
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79 /*
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80 * cproj(double complex z)
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81 *
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82 * These functions return the value of the projection (not stereographic!)
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83 * onto the Riemann sphere.
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84 *
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85 * z projects to z, except that all complex infinities (even those with one
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86 * infinite part and one NaN part) project to positive infinity on the real axis.
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87 * If z has an infinite part, then cproj(z) shall be equivalent to:
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88 *
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89 * INFINITY + I * copysign(0.0, cimag(z))
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90 */
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91 double complex
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92 cproj(double complex z)
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93 {
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94 double_complex w = { .z = z };
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95
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96 if (isinf(creal(z)) || isinf(cimag(z))) {
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97 #ifdef __INFINITY
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98 REAL_PART(w) = __INFINITY;
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99 #else
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100 REAL_PART(w) = HUGE_VAL;
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101 #endif
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102 IMAG_PART(w) = copysign(0.0, cimag(z));
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103 }
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104
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105 return (w.z);
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106 }