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| author | Yu-Ping Wu <yupingso@chromium.org> | 2021-12-02 10:54:32 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2021-12-08 00:51:43 +0000 |
| commit | 00c834dc26348487f40e835630ab11cf30fe30f6 (patch) | |
| tree | 7140ac20ca8d8e490f35f31b72636d33d921ed5b /tests | |
| parent | 04cf42775cca3f300dc3e8240bc70e706f091ca0 (diff) | |
| download | coreboot-00c834dc26348487f40e835630ab11cf30fe30f6.tar.gz coreboot-00c834dc26348487f40e835630ab11cf30fe30f6.tar.bz2 coreboot-00c834dc26348487f40e835630ab11cf30fe30f6.zip | |
lib: Fix log2_ceil() for 0xffffffff
Current log2_ceil(x) is defined as log2(x * 2 - 1). When x is larger
than (1 << 31), (x * 2 - 1) won't fit in u32, leading to incorrect
result. Therefore, correct it as (log2(x - 1) + 1). Also add unit tests
for inline functions in lib.h.
BUG=none
TEST=make tests/lib/lib-test
BRANCH=none
Change-Id: If868f793b909a6ad7fc48a7affac15e2c714fa2e
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59834
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/lib/Makefile.inc | 3 | ||||
| -rw-r--r-- | tests/lib/lib-test.c | 60 |
2 files changed, 63 insertions, 0 deletions
diff --git a/tests/lib/Makefile.inc b/tests/lib/Makefile.inc index 0aea0ce62a76..9a624767ca45 100644 --- a/tests/lib/Makefile.inc +++ b/tests/lib/Makefile.inc @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0-only +tests-y += lib-test tests-y += string-test tests-y += b64_decode-test tests-y += hexstrtobin-test @@ -40,6 +41,8 @@ tests-y += cbfs-lookup-no-mcache-test tests-y += cbfs-lookup-has-mcache-test tests-y += lzma-test +lib-test-srcs += tests/lib/lib-test.c + string-test-srcs += tests/lib/string-test.c string-test-srcs += src/lib/string.c diff --git a/tests/lib/lib-test.c b/tests/lib/lib-test.c new file mode 100644 index 000000000000..adaa2f9500ef --- /dev/null +++ b/tests/lib/lib-test.c @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <lib.h> +#include <tests/test.h> + +void test_popcnt(void **state) +{ + assert_int_equal(popcnt(0x0), 0); + assert_int_equal(popcnt(0x10), 1); + assert_int_equal(popcnt(0x10010010), 3); + assert_int_equal(popcnt(0xffffffff), 32); +} + +void test_clz(void **state) +{ + assert_int_equal(clz(0x0), 32); + assert_int_equal(clz(0xf), 28); + assert_int_equal(clz(0x80000000), 0); + assert_int_equal(clz(0xffffffff), 0); +} + +void test_log2(void **state) +{ + assert_int_equal(log2(0x0), -1); + assert_int_equal(log2(0x1), 0); + assert_int_equal(log2(0x5), 2); + assert_int_equal(log2(0x80000000), 31); + assert_int_equal(log2(0xffffffff), 31); +} + +void test_ffs(void **state) +{ + assert_int_equal(__ffs(0x0), -1); + assert_int_equal(__ffs(0x1), 0); + assert_int_equal(__ffs(0x1010), 4); + assert_int_equal(__ffs(0x10000000), 28); + assert_int_equal(__ffs(0xffffffff), 0); +} + +void test_log2_ceil(void **state) +{ + assert_int_equal(log2_ceil(0x0), -1); + assert_int_equal(log2_ceil(0x1), 0); + assert_int_equal(log2_ceil(0x5), 3); + assert_int_equal(log2_ceil(0x80000000), 31); + assert_int_equal(log2_ceil(0xffffffff), 32); +} + +int main(void) +{ + const struct CMUnitTest tests[] = { + cmocka_unit_test(test_popcnt), + cmocka_unit_test(test_clz), + cmocka_unit_test(test_log2), + cmocka_unit_test(test_ffs), + cmocka_unit_test(test_log2_ceil), + }; + + return cb_run_group_tests(tests, NULL, NULL); +} |