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
  13 typedef struct {
  14     uint32_t value;
  15     int start;
  16     int length;
  17     int32_t result;
  18 } S32Test;
  19
  20 typedef struct {
  21     uint64_t value;
  22     int start;
  23     int length;
  24     int64_t result;
  25 } S64Test;
  26
  27 static const S32Test test_s32_data[] = {
  28     { 0x38463983, 4, 4, -8 },
  29     { 0x38463983, 12, 8, 0x63 },
  30     { 0x38463983, 0, 32, 0x38463983 },
  31 };
  32
  33 static const S64Test test_s64_data[] = {
  34     { 0x8459826734967223ULL, 60, 4, -8 },
  35     { 0x8459826734967223ULL, 0, 64, 0x8459826734967223LL },
  36 };
  37
  38 static 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
  50 static 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
  69 int 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 }