Mercurial > gnulib
annotate tests/test-copysignl.c @ 40057:b06060465f09
maint: Run 'make update-copyright'
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Tue, 01 Jan 2019 00:25:11 +0100 |
| parents | 10eb9086bea0 |
| children |
| rev | line source |
|---|---|
| 15914 | 1 /* Test of copysignl() function. |
|
40057
b06060465f09
maint: Run 'make update-copyright'
Paul Eggert <eggert@cs.ucla.edu>
parents:
19484
diff
changeset
|
2 Copyright (C) 2010-2019 Free Software Foundation, Inc. |
| 15914 | 3 |
| 4 This program is free software: you can redistribute it and/or modify | |
| 5 it under the terms of the GNU General Public License as published by | |
| 6 the Free Software Foundation; either version 3 of the License, or | |
| 7 (at your option) any later version. | |
| 8 | |
| 9 This program is distributed in the hope that it will be useful, | |
| 10 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 GNU General Public License for more details. | |
| 13 | |
| 14 You should have received a copy of the GNU General Public License | |
| 19190 | 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| 15914 | 16 |
| 17 /* Written by Bruno Haible <bruno@clisp.org>, 2010-2011. */ | |
| 18 | |
| 19 #include <config.h> | |
| 20 | |
| 21 #include <math.h> | |
| 22 | |
| 23 #include "signature.h" | |
| 24 SIGNATURE_CHECK (copysignl, long double, (long double, long double)); | |
| 25 | |
| 26 #include "macros.h" | |
| 27 #include "minus-zero.h" | |
| 28 | |
| 29 #include <string.h> | |
| 30 | |
| 31 volatile long double x; | |
| 32 volatile long double y; | |
| 33 long double z; | |
| 34 long double zero = 0.0L; | |
| 35 | |
| 36 int | |
| 37 main () | |
| 38 { | |
| 39 /* A particular value in the first quadrant. */ | |
| 40 x = 0.6L; | |
| 41 y = 0.8L; | |
| 42 z = copysignl (x, y); | |
| 43 ASSERT (z == 0.6L); | |
| 44 | |
| 45 /* A particular value in the second quadrant. */ | |
| 46 x = -0.6L; | |
| 47 y = 0.8L; | |
| 48 z = copysignl (x, y); | |
| 49 ASSERT (z == 0.6L); | |
| 50 | |
| 51 /* A particular value in the third quadrant. */ | |
| 52 x = -0.6L; | |
| 53 y = -0.8L; | |
| 54 z = copysignl (x, y); | |
| 55 ASSERT (z == -0.6L); | |
| 56 | |
| 57 /* A particular value in the fourth quadrant. */ | |
| 58 x = 0.6L; | |
| 59 y = -0.8L; | |
| 60 z = copysignl (x, y); | |
| 61 ASSERT (z == -0.6L); | |
| 62 | |
| 63 /* From signed zero. */ | |
| 64 x = 1.0L; | |
| 65 y = 0.0L; | |
| 66 z = copysignl (x, y); | |
| 67 ASSERT (z == 1.0L); | |
| 68 | |
| 69 x = 1.0L; | |
| 70 y = minus_zerol; | |
| 71 z = copysignl (x, y); | |
| 72 /* Assume all gnulib targets support -0.0L, until proven otherwise. */ | |
| 73 ASSERT (z == -1.0L); | |
| 74 | |
| 75 x = -1.0L; | |
| 76 y = 0.0L; | |
| 77 z = copysignl (x, y); | |
| 78 ASSERT (z == 1.0L); | |
| 79 | |
| 80 x = -1.0L; | |
| 81 y = minus_zerol; | |
| 82 z = copysignl (x, y); | |
| 83 ASSERT (z == -1.0L); | |
| 84 | |
| 85 /* To signed zero. */ | |
| 86 x = 0.0L; | |
| 87 y = 1.0L; | |
| 88 z = copysignl (x, y); | |
| 89 ASSERT (z == 0.0L); | |
| 90 ASSERT (memcmp (&z, &zero, sizeof z) == 0); | |
| 91 | |
| 92 x = 0.0L; | |
| 93 y = -1.0L; | |
| 94 z = copysignl (x, y); | |
| 95 ASSERT (z == 0.0L); | |
| 96 ASSERT (memcmp (&z, &zero, sizeof z) != 0); | |
| 97 | |
| 98 x = minus_zerol; | |
| 99 y = 1.0L; | |
| 100 z = copysignl (x, y); | |
| 101 ASSERT (z == 0.0L); | |
| 102 ASSERT (memcmp (&z, &zero, sizeof z) == 0); | |
| 103 | |
| 104 x = minus_zerol; | |
| 105 y = -1.0L; | |
| 106 z = copysignl (x, y); | |
| 107 ASSERT (z == 0.0L); | |
| 108 ASSERT (memcmp (&z, &zero, sizeof z) != 0); | |
| 109 | |
| 110 return 0; | |
| 111 } |