Mercurial > hg > octave-lojdl > gnulib-hg
annotate tests/test-truncl-ieee.c @ 15681:c21e706c88b2
Tests for module 'shutdown'.
* modules/shutdown-tests: New file.
* tests/test-shutdown.c: New file.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Tue, 20 Sep 2011 21:38:04 +0200 |
| parents | 97fc9a21a8fb |
| children | 8250f2777afc |
| rev | line source |
|---|---|
| 13987 | 1 /* Test of rounding towards zero. |
|
14079
97fc9a21a8fb
maint: update almost all copyright ranges to include 2011
Jim Meyering <meyering@redhat.com>
parents:
13993
diff
changeset
|
2 Copyright (C) 2010-2011 Free Software Foundation, Inc. |
| 13987 | 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 | |
| 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 16 | |
| 17 #include <config.h> | |
| 18 | |
| 19 #include <math.h> | |
| 20 | |
| 21 #include "fpucw.h" | |
| 22 #include "minus-zero.h" | |
| 23 #include "macros.h" | |
| 24 | |
| 25 int | |
| 26 main () | |
| 27 { | |
| 28 DECL_LONG_DOUBLE_ROUNDING | |
| 29 | |
| 30 BEGIN_LONG_DOUBLE_ROUNDING (); | |
| 31 | |
|
13993
9e9aaf4c9464
trunc: Implement result sign according to IEEE 754.
Bruno Haible <bruno@clisp.org>
parents:
13987
diff
changeset
|
32 /* See IEEE 754, section 6.3: |
|
9e9aaf4c9464
trunc: Implement result sign according to IEEE 754.
Bruno Haible <bruno@clisp.org>
parents:
13987
diff
changeset
|
33 "the sign of the result of the round floating-point number to |
|
9e9aaf4c9464
trunc: Implement result sign according to IEEE 754.
Bruno Haible <bruno@clisp.org>
parents:
13987
diff
changeset
|
34 integral value operation is the sign of the operand. These rules |
|
9e9aaf4c9464
trunc: Implement result sign according to IEEE 754.
Bruno Haible <bruno@clisp.org>
parents:
13987
diff
changeset
|
35 shall apply even when operands or results are zero or infinite." */ |
|
9e9aaf4c9464
trunc: Implement result sign according to IEEE 754.
Bruno Haible <bruno@clisp.org>
parents:
13987
diff
changeset
|
36 |
| 13987 | 37 /* Zero. */ |
| 38 ASSERT (!signbit (truncl (0.0L))); | |
| 39 ASSERT (!!signbit (truncl (minus_zerol)) == !!signbit (minus_zerol)); | |
|
13993
9e9aaf4c9464
trunc: Implement result sign according to IEEE 754.
Bruno Haible <bruno@clisp.org>
parents:
13987
diff
changeset
|
40 /* Positive numbers. */ |
|
9e9aaf4c9464
trunc: Implement result sign according to IEEE 754.
Bruno Haible <bruno@clisp.org>
parents:
13987
diff
changeset
|
41 ASSERT (!signbit (truncl (0.3L))); |
|
9e9aaf4c9464
trunc: Implement result sign according to IEEE 754.
Bruno Haible <bruno@clisp.org>
parents:
13987
diff
changeset
|
42 ASSERT (!signbit (truncl (0.7L))); |
|
9e9aaf4c9464
trunc: Implement result sign according to IEEE 754.
Bruno Haible <bruno@clisp.org>
parents:
13987
diff
changeset
|
43 /* Negative numbers. */ |
|
9e9aaf4c9464
trunc: Implement result sign according to IEEE 754.
Bruno Haible <bruno@clisp.org>
parents:
13987
diff
changeset
|
44 ASSERT (!!signbit (truncl (-0.3L)) == !!signbit (minus_zerol)); |
|
9e9aaf4c9464
trunc: Implement result sign according to IEEE 754.
Bruno Haible <bruno@clisp.org>
parents:
13987
diff
changeset
|
45 ASSERT (!!signbit (truncl (-0.7L)) == !!signbit (minus_zerol)); |
| 13987 | 46 |
| 47 return 0; | |
| 48 } |