diff options
| -rw-r--r-- | src/include/lib.h | 4 | ||||
| -rw-r--r-- | tests/lib/Makefile.inc | 3 | ||||
| -rw-r--r-- | tests/lib/lib-test.c | 60 |
3 files changed, 65 insertions, 2 deletions
diff --git a/src/include/lib.h b/src/include/lib.h index 8e8bab55c19c..b3cedb571c78 100644 --- a/src/include/lib.h +++ b/src/include/lib.h @@ -54,8 +54,8 @@ static inline int log2(u32 x) { return sizeof(x) * 8 - clz(x) - 1; } /* Find First Set: __ffs(1) == 0, __ffs(0) == -1, __ffs(1<<31) == 31 */ static inline int __ffs(u32 x) { return log2(x & (u32)(-(s32)x)); } -/* Integer binary logarithm (rounding up): log2_ceil(0) == -1, log2(5) == 3 */ -static inline int log2_ceil(u32 x) { return (x == 0) ? -1 : log2(x * 2 - 1); } +/* Integer binary logarithm (rounding up): log2_ceil(0) == -1, log2_ceil(5) == 3 */ +static inline int log2_ceil(u32 x) { return (x == 0) ? -1 : log2(x - 1) + 1; } static inline int popcnt64(u64 x) { return __builtin_popcountll(x); } static inline int clz64(u64 x) { return x ? __builtin_clzll(x) : sizeof(x) * 8; } 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); +} |