94 lines
3.0 KiB
Diff
94 lines
3.0 KiB
Diff
commit d877b52d58b1c73810751bdb48987b84bda87d5e
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Author: Joe Simmons-Talbott <josimmon@redhat.com>
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Date: Tue Apr 4 09:57:47 2023 -0400
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stdlib: Add testcases for llabs(). (BZ #30263)
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Test minimum and maximum long long values, zero, 32bit crossover points, and
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part of the range of long long values. Use '-fno-builtin' to ensure we are
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testing the implementation.
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Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
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diff --git a/stdlib/Makefile b/stdlib/Makefile
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index 2bc09c76ffea39e4..fe43bec0f9d581d5 100644
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--- a/stdlib/Makefile
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+++ b/stdlib/Makefile
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@@ -108,6 +108,7 @@ tests := \
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tst-getrandom \
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tst-labs \
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tst-limits \
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+ tst-llabs \
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tst-makecontext \
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tst-makecontext-align \
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tst-makecontext2 \
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@@ -178,6 +179,7 @@ LDLIBS-test-dlclose-exit-race-helper.so = $(libsupport) $(shared-thread-library)
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CFLAGS-tst-abs.c += -fno-builtin
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CFLAGS-tst-labs.c += -fno-builtin
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+CFLAGS-tst-llabs.c += -fno-builtin
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ifeq ($(have-cxx-thread_local),yes)
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CFLAGS-tst-quick_exit.o = -std=c++11
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diff --git a/stdlib/tst-llabs.c b/stdlib/tst-llabs.c
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new file mode 100644
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index 0000000000000000..be3cd78ceb5e8013
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--- /dev/null
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+++ b/stdlib/tst-llabs.c
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@@ -0,0 +1,55 @@
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+/* Basic tests for llabs.
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+ Copyright (C) 2023 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <https://www.gnu.org/licenses/>. */
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+
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+#include <limits.h>
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+#include <stdlib.h>
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+
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+#include <support/check.h>
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+
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+#define LARGE_PRIME 49999
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+
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+static int do_test (void)
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+{
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+ long i;
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+
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+ TEST_COMPARE(llabs(LLONG_MAX), LLONG_MAX);
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+ TEST_COMPARE(llabs(LLONG_MIN + 1), LLONG_MAX);
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+ TEST_COMPARE(llabs(0x00000000ffffffffL), 0x00000000ffffffffL);
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+ TEST_COMPARE(llabs(0x0000000100000000L), 0x0000000100000000L);
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+ TEST_COMPARE(llabs(0x80000000ffffffffL), 0x7fffffff00000001L);
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+ TEST_COMPARE(llabs(0x8000000100000000L), 0x7fffffff00000000L);
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+ TEST_COMPARE(llabs(-1), 1);
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+ TEST_COMPARE(llabs(0), 0);
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+ TEST_COMPARE(llabs(1), 1);
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+
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+ for (i = LLONG_MIN + 1; i < LLONG_MIN + INT_MAX; i += LARGE_PRIME)
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+ TEST_COMPARE(llabs(i), -i);
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+
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+ for (i = LLONG_MAX - INT_MAX; i < LLONG_MAX - LARGE_PRIME; i += LARGE_PRIME)
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+ TEST_COMPARE(llabs(i), i);
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+
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+ for (i = INT_MIN + 1; i < 0; i += LARGE_PRIME)
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+ TEST_COMPARE(llabs(i), -i);
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+
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+ for (i = 0; i < INT_MAX; i += LARGE_PRIME)
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+ TEST_COMPARE(llabs(i), i);
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+
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+ return EXIT_SUCCESS;
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+}
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+
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+#include <support/test-driver.c>
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