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authorJoe Simmons-Talbott <josimmon@redhat.com>2023-04-04 09:57:47 -0400
committerSiddhesh Poyarekar <siddhesh@sourceware.org>2023-05-16 14:38:20 -0400
commitd877b52d58b1c73810751bdb48987b84bda87d5e (patch)
treee6f6dff58f9a3f0dc4bee2b6a719c74fefff59df
parentb11db301e162480d1812937ab0410dc7585f423c (diff)
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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/Makefile2
-rw-r--r--stdlib/tst-llabs.c55
2 files changed, 57 insertions, 0 deletions
diff --git a/stdlib/Makefile b/stdlib/Makefile
index 0f58a6b..0975f55 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 0000000..be3cd78
--- /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>