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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright (C) 2023 Microsoft Corporation
*/
#include <limits.h>
#include <string.h>
#include <rte_bitops.h>
#include <rte_debug.h>
#include "test.h"
RTE_LOG_REGISTER(bitcount_logtype_test, test.bitcount, INFO);
static int
test_clz32(void)
{
size_t leading;
uint32_t v = 0xffffffff;
for (leading = 0; v; leading++) {
RTE_TEST_ASSERT(rte_clz32(v) == leading,
"Unexpected count.");
v >>= 1;
}
return 0;
}
static int
test_clz64(void)
{
size_t leading;
uint64_t v = 0xffffffffffffffff;
for (leading = 0; v; leading++) {
RTE_TEST_ASSERT(rte_clz64(v) == leading,
"Unexpected count.");
v >>= 1;
}
return 0;
}
static int
test_ctz32(void)
{
size_t trailing;
uint32_t v = 1;
for (trailing = 0; v; trailing++) {
RTE_TEST_ASSERT(rte_ctz32(v) == trailing,
"Unexpected count.");
v <<= 1;
}
return 0;
}
static int
test_ctz64(void)
{
size_t trailing;
uint64_t v = 1;
for (trailing = 0; v; trailing++) {
RTE_TEST_ASSERT(rte_ctz64(v) == trailing,
"Unexpected count.");
v <<= 1;
}
return 0;
}
static int
test_popcount32(void)
{
size_t shift;
uint32_t v = 0;
const size_t bits = sizeof(v) * CHAR_BIT;
for (shift = 0; shift < bits; shift++) {
RTE_TEST_ASSERT(rte_popcount32(v) == shift,
"Unexpected count.");
v <<= 1;
v |= 1;
}
RTE_TEST_ASSERT(rte_popcount32(v) == bits,
"Unexpected count.");
return 0;
}
static int
test_popcount64(void)
{
size_t shift;
uint64_t v = 0;
const size_t bits = sizeof(v) * CHAR_BIT;
for (shift = 0; shift < bits; shift++) {
RTE_TEST_ASSERT(rte_popcount64(v) == shift,
"Unexpected count.");
v <<= 1;
v |= 1;
}
RTE_TEST_ASSERT(rte_popcount64(v) == bits,
"Unexpected count.");
return 0;
}
static int
test_bit_scan_forward(void)
{
unsigned int bit_nr;
TEST_ASSERT((bit_nr = rte_ffs32(0)) == 0,
"rte_ffs32 returned unexpected %d", bit_nr);
for (int i = 0; i < 32; ++i) {
uint32_t n = RTE_BIT32(i);
TEST_ASSERT((bit_nr = rte_ffs32(n)) == (unsigned int)(i+1),
"rte_ffs32 returned unexpected %d", bit_nr);
}
return TEST_SUCCESS;
}
static int
test_bit_scan_forward64(void)
{
unsigned int bit_nr;
TEST_ASSERT((bit_nr = rte_ffs64(0)) == 0,
"rte_ffs64 returned unexpected %d", bit_nr);
for (int i = 0; i < 64; ++i) {
uint64_t n = RTE_BIT64(i);
TEST_ASSERT((bit_nr = rte_ffs64(n)) == (unsigned int)(i+1),
"rte_ffs64 returned unexpected %d", bit_nr);
}
return TEST_SUCCESS;
}
static struct unit_test_suite bitcount_test_suite = {
.suite_name = "bitcount autotest",
.setup = NULL,
.teardown = NULL,
.unit_test_cases = {
TEST_CASE(test_clz32),
TEST_CASE(test_clz64),
TEST_CASE(test_ctz32),
TEST_CASE(test_ctz64),
TEST_CASE(test_popcount32),
TEST_CASE(test_popcount64),
TEST_CASE(test_bit_scan_forward),
TEST_CASE(test_bit_scan_forward64),
TEST_CASES_END()
}
};
static int
test_bitcount(void)
{
return unit_test_suite_runner(&bitcount_test_suite);
}
REGISTER_FAST_TEST(bitcount_autotest, true, true, test_bitcount);
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