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Diffstat (limited to 'gnulib/tests/test-copysignl.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/tests/test-copysignl.c | 111 |
2 files changed, 111 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/tests/test-copysignl.c b/gnulib/tests/test-copysignl.c new file mode 100644 index 0000000..29b3c3f --- /dev/null +++ b/gnulib/tests/test-copysignl.c @@ -0,0 +1,111 @@ +/* Test of copysignl() function. + Copyright (C) 2010-2011 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +/* Written by Bruno Haible <bruno@clisp.org>, 2010-2011. */ + +#include <config.h> + +#include <math.h> + +#include "signature.h" +SIGNATURE_CHECK (copysignl, long double, (long double, long double)); + +#include "macros.h" +#include "minus-zero.h" + +#include <string.h> + +volatile long double x; +volatile long double y; +long double z; +long double zero = 0.0L; + +int +main () +{ + /* A particular value in the first quadrant. */ + x = 0.6L; + y = 0.8L; + z = copysignl (x, y); + ASSERT (z == 0.6L); + + /* A particular value in the second quadrant. */ + x = -0.6L; + y = 0.8L; + z = copysignl (x, y); + ASSERT (z == 0.6L); + + /* A particular value in the third quadrant. */ + x = -0.6L; + y = -0.8L; + z = copysignl (x, y); + ASSERT (z == -0.6L); + + /* A particular value in the fourth quadrant. */ + x = 0.6L; + y = -0.8L; + z = copysignl (x, y); + ASSERT (z == -0.6L); + + /* From signed zero. */ + x = 1.0L; + y = 0.0L; + z = copysignl (x, y); + ASSERT (z == 1.0L); + + x = 1.0L; + y = minus_zerol; + z = copysignl (x, y); + /* Assume all gnulib targets support -0.0L, until proven otherwise. */ + ASSERT (z == -1.0L); + + x = -1.0L; + y = 0.0L; + z = copysignl (x, y); + ASSERT (z == 1.0L); + + x = -1.0L; + y = minus_zerol; + z = copysignl (x, y); + ASSERT (z == -1.0L); + + /* To signed zero. */ + x = 0.0L; + y = 1.0L; + z = copysignl (x, y); + ASSERT (z == 0.0L); + ASSERT (memcmp (&z, &zero, sizeof z) == 0); + + x = 0.0L; + y = -1.0L; + z = copysignl (x, y); + ASSERT (z == 0.0L); + ASSERT (memcmp (&z, &zero, sizeof z) != 0); + + x = minus_zerol; + y = 1.0L; + z = copysignl (x, y); + ASSERT (z == 0.0L); + ASSERT (memcmp (&z, &zero, sizeof z) == 0); + + x = minus_zerol; + y = -1.0L; + z = copysignl (x, y); + ASSERT (z == 0.0L); + ASSERT (memcmp (&z, &zero, sizeof z) != 0); + + return 0; +} |