LXR qemu/tests/test-bitops.c

   1/*
   2 * Test bitops routines
   3 *
   4 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
   5 * See the COPYING.LIB file in the top-level directory.
   6 *
   7 */
   8
   9#include "qemu/osdep.h"
  10#include <glib.h>
  11#include "qemu/bitops.h"
  12
  13typedef struct {
  14    uint32_t value;
  15    int start;
  16    int length;
  17    int32_t result;
  18} S32Test;
  19
  20typedef struct {
  21    uint64_t value;
  22    int start;
  23    int length;
  24    int64_t result;
  25} S64Test;
  26
  27static const S32Test test_s32_data[] = {
  28    { 0x38463983, 4, 4, -8 },
  29    { 0x38463983, 12, 8, 0x63 },
  30    { 0x38463983, 0, 32, 0x38463983 },
  31};
  32
  33static const S64Test test_s64_data[] = {
  34    { 0x8459826734967223ULL, 60, 4, -8 },
  35    { 0x8459826734967223ULL, 0, 64, 0x8459826734967223LL },
  36};
  37
  38static void test_sextract32(void)
  39{
  40    int i;
  41
  42    for (i = 0; i < ARRAY_SIZE(test_s32_data); i++) {
  43        const S32Test *test = &test_s32_data[i];
  44        int32_t r = sextract32(test->value, test->start, test->length);
  45
  46        g_assert_cmpint(r, ==, test->result);
  47    }
  48}
  49
  50static void test_sextract64(void)
  51{
  52    int i;
  53
  54    for (i = 0; i < ARRAY_SIZE(test_s32_data); i++) {
  55        const S32Test *test = &test_s32_data[i];
  56        int64_t r = sextract64(test->value, test->start, test->length);
  57
  58        g_assert_cmpint(r, ==, test->result);
  59    }
  60
  61    for (i = 0; i < ARRAY_SIZE(test_s64_data); i++) {
  62        const S64Test *test = &test_s64_data[i];
  63        int64_t r = sextract64(test->value, test->start, test->length);
  64
  65        g_assert_cmpint(r, ==, test->result);
  66    }
  67}
  68
  69int main(int argc, char **argv)
  70{
  71    g_test_init(&argc, &argv, NULL);
  72    g_test_add_func("/bitops/sextract32", test_sextract32);
  73    g_test_add_func("/bitops/sextract64", test_sextract64);
  74    return g_test_run();
  75}
  76