From c3f8962f320d58fcd28bd8722334f6221edf7738 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Alex=20Benn=C3=A9e?= Date: Fri, 9 Dec 2016 14:36:00 +0000 Subject: tests: New test-bitcnt MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add some unit tests for bit count functions (currently only ctpop). As the routines are based on the Hackers Delight optimisations I based the test patterns on their tests. Signed-off-by: Alex Bennée Signed-off-by: Richard Henderson --- tests/test-bitcnt.c | 140 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 140 insertions(+) create mode 100644 tests/test-bitcnt.c (limited to 'tests/test-bitcnt.c') diff --git a/tests/test-bitcnt.c b/tests/test-bitcnt.c new file mode 100644 index 0000000000..e153dcb8a2 --- /dev/null +++ b/tests/test-bitcnt.c @@ -0,0 +1,140 @@ +/* + * Test bit count routines + * + * This work is licensed under the terms of the GNU LGPL, version 2 or later. + * See the COPYING.LIB file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "qemu/host-utils.h" + +struct bitcnt_test_data { + /* value to count */ + union { + uint8_t w8; + uint16_t w16; + uint32_t w32; + uint64_t w64; + } value; + /* expected result */ + int popct; +}; + +struct bitcnt_test_data eight_bit_data[] = { + { { .w8 = 0x00 }, .popct=0 }, + { { .w8 = 0x01 }, .popct=1 }, + { { .w8 = 0x03 }, .popct=2 }, + { { .w8 = 0x04 }, .popct=1 }, + { { .w8 = 0x0f }, .popct=4 }, + { { .w8 = 0x3f }, .popct=6 }, + { { .w8 = 0x40 }, .popct=1 }, + { { .w8 = 0xf0 }, .popct=4 }, + { { .w8 = 0x7f }, .popct=7 }, + { { .w8 = 0x80 }, .popct=1 }, + { { .w8 = 0xf1 }, .popct=5 }, + { { .w8 = 0xfe }, .popct=7 }, + { { .w8 = 0xff }, .popct=8 }, +}; + +static void test_ctpop8(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(eight_bit_data); i++) { + struct bitcnt_test_data *d = &eight_bit_data[i]; + g_assert(ctpop8(d->value.w8)==d->popct); + } +} + +struct bitcnt_test_data sixteen_bit_data[] = { + { { .w16 = 0x0000 }, .popct=0 }, + { { .w16 = 0x0001 }, .popct=1 }, + { { .w16 = 0x0003 }, .popct=2 }, + { { .w16 = 0x000f }, .popct=4 }, + { { .w16 = 0x003f }, .popct=6 }, + { { .w16 = 0x00f0 }, .popct=4 }, + { { .w16 = 0x0f0f }, .popct=8 }, + { { .w16 = 0x1f1f }, .popct=10 }, + { { .w16 = 0x4000 }, .popct=1 }, + { { .w16 = 0x4001 }, .popct=2 }, + { { .w16 = 0x7000 }, .popct=3 }, + { { .w16 = 0x7fff }, .popct=15 }, +}; + +static void test_ctpop16(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(sixteen_bit_data); i++) { + struct bitcnt_test_data *d = &sixteen_bit_data[i]; + g_assert(ctpop16(d->value.w16)==d->popct); + } +} + +struct bitcnt_test_data thirtytwo_bit_data[] = { + { { .w32 = 0x00000000 }, .popct=0 }, + { { .w32 = 0x00000001 }, .popct=1 }, + { { .w32 = 0x0000000f }, .popct=4 }, + { { .w32 = 0x00000f0f }, .popct=8 }, + { { .w32 = 0x00001f1f }, .popct=10 }, + { { .w32 = 0x00004001 }, .popct=2 }, + { { .w32 = 0x00007000 }, .popct=3 }, + { { .w32 = 0x00007fff }, .popct=15 }, + { { .w32 = 0x55555555 }, .popct=16 }, + { { .w32 = 0xaaaaaaaa }, .popct=16 }, + { { .w32 = 0xff000000 }, .popct=8 }, + { { .w32 = 0xc0c0c0c0 }, .popct=8 }, + { { .w32 = 0x0ffffff0 }, .popct=24 }, + { { .w32 = 0x80000000 }, .popct=1 }, + { { .w32 = 0xffffffff }, .popct=32 }, +}; + +static void test_ctpop32(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(thirtytwo_bit_data); i++) { + struct bitcnt_test_data *d = &thirtytwo_bit_data[i]; + g_assert(ctpop32(d->value.w32)==d->popct); + } +} + +struct bitcnt_test_data sixtyfour_bit_data[] = { + { { .w64 = 0x0000000000000000ULL }, .popct=0 }, + { { .w64 = 0x0000000000000001ULL }, .popct=1 }, + { { .w64 = 0x000000000000000fULL }, .popct=4 }, + { { .w64 = 0x0000000000000f0fULL }, .popct=8 }, + { { .w64 = 0x0000000000001f1fULL }, .popct=10 }, + { { .w64 = 0x0000000000004001ULL }, .popct=2 }, + { { .w64 = 0x0000000000007000ULL }, .popct=3 }, + { { .w64 = 0x0000000000007fffULL }, .popct=15 }, + { { .w64 = 0x0000005500555555ULL }, .popct=16 }, + { { .w64 = 0x00aa0000aaaa00aaULL }, .popct=16 }, + { { .w64 = 0x000f000000f00000ULL }, .popct=8 }, + { { .w64 = 0x0c0c0000c0c0c0c0ULL }, .popct=12 }, + { { .w64 = 0xf00f00f0f0f0f000ULL }, .popct=24 }, + { { .w64 = 0x8000000000000000ULL }, .popct=1 }, + { { .w64 = 0xf0f0f0f0f0f0f0f0ULL }, .popct=32 }, + { { .w64 = 0xffffffffffffffffULL }, .popct=64 }, +}; + +static void test_ctpop64(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(sixtyfour_bit_data); i++) { + struct bitcnt_test_data *d = &sixtyfour_bit_data[i]; + g_assert(ctpop64(d->value.w64)==d->popct); + } +} + +int main(int argc, char **argv) +{ + g_test_init(&argc, &argv, NULL); + g_test_add_func("/bitcnt/ctpop8", test_ctpop8); + g_test_add_func("/bitcnt/ctpop16", test_ctpop16); + g_test_add_func("/bitcnt/ctpop32", test_ctpop32); + g_test_add_func("/bitcnt/ctpop64", test_ctpop64); + return g_test_run(); +} -- cgit v1.2.1