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| author | Joe Simmons-Talbott <josimmon@redhat.com> | 2023-04-04 09:57:47 -0400 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2023-05-16 14:38:20 -0400 |
| commit | d877b52d58b1c73810751bdb48987b84bda87d5e (patch) | |
| tree | e6f6dff58f9a3f0dc4bee2b6a719c74fefff59df | |
| parent | b11db301e162480d1812937ab0410dc7585f423c (diff) | |
| download | glibc-d877b52d58b1c73810751bdb48987b84bda87d5e.tar.gz glibc-d877b52d58b1c73810751bdb48987b84bda87d5e.tar.xz glibc-d877b52d58b1c73810751bdb48987b84bda87d5e.zip | |
stdlib: Add testcases for llabs(). (BZ #30263)
Test minimum and maximum long long values, zero, 32bit crossover points, and part of the range of long long values. Use '-fno-builtin' to ensure we are testing the implementation. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
| -rw-r--r-- | stdlib/Makefile | 2 | ||||
| -rw-r--r-- | stdlib/tst-llabs.c | 55 |
2 files changed, 57 insertions, 0 deletions
diff --git a/stdlib/Makefile b/stdlib/Makefile index 0f58a6b62d..0975f55ee6 100644 --- a/stdlib/Makefile +++ b/stdlib/Makefile @@ -200,6 +200,7 @@ tests := \ tst-getrandom \ tst-labs \ tst-limits \ + tst-llabs \ tst-makecontext \ tst-makecontext-align \ tst-makecontext2 \ @@ -291,6 +292,7 @@ LDLIBS-test-dlclose-exit-race-helper.so = $(libsupport) $(shared-thread-library) CFLAGS-tst-abs.c += -fno-builtin CFLAGS-tst-labs.c += -fno-builtin +CFLAGS-tst-llabs.c += -fno-builtin ifeq ($(have-cxx-thread_local),yes) CFLAGS-tst-quick_exit.o = -std=c++11 diff --git a/stdlib/tst-llabs.c b/stdlib/tst-llabs.c new file mode 100644 index 0000000000..be3cd78ceb --- /dev/null +++ b/stdlib/tst-llabs.c @@ -0,0 +1,55 @@ +/* Basic tests for llabs. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <limits.h> +#include <stdlib.h> + +#include <support/check.h> + +#define LARGE_PRIME 49999 + +static int do_test (void) +{ + long i; + + TEST_COMPARE(llabs(LLONG_MAX), LLONG_MAX); + TEST_COMPARE(llabs(LLONG_MIN + 1), LLONG_MAX); + TEST_COMPARE(llabs(0x00000000ffffffffL), 0x00000000ffffffffL); + TEST_COMPARE(llabs(0x0000000100000000L), 0x0000000100000000L); + TEST_COMPARE(llabs(0x80000000ffffffffL), 0x7fffffff00000001L); + TEST_COMPARE(llabs(0x8000000100000000L), 0x7fffffff00000000L); + TEST_COMPARE(llabs(-1), 1); + TEST_COMPARE(llabs(0), 0); + TEST_COMPARE(llabs(1), 1); + + for (i = LLONG_MIN + 1; i < LLONG_MIN + INT_MAX; i += LARGE_PRIME) + TEST_COMPARE(llabs(i), -i); + + for (i = LLONG_MAX - INT_MAX; i < LLONG_MAX - LARGE_PRIME; i += LARGE_PRIME) + TEST_COMPARE(llabs(i), i); + + for (i = INT_MIN + 1; i < 0; i += LARGE_PRIME) + TEST_COMPARE(llabs(i), -i); + + for (i = 0; i < INT_MAX; i += LARGE_PRIME) + TEST_COMPARE(llabs(i), i); + + return EXIT_SUCCESS; +} + +#include <support/test-driver.c> |