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