tests/test-mul64.c

   1 /*
   2  * Test 64x64 -> 128 multiply subroutines
   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/host-utils.h"
  12
  13
  14 typedef struct {
  15     uint64_t a, b;
  16     uint64_t rh, rl;
  17 } Test;
  18
  19 static const Test test_u_data[] = {
  20     { 1, 1, 0, 1 },
  21     { 10000, 10000, 0, 100000000 },
  22     { 0xffffffffffffffffULL, 2, 1, 0xfffffffffffffffeULL },
  23     { 0xffffffffffffffffULL, 0xffffffffffffffffULL,
  24       0xfffffffffffffffeULL, 0x0000000000000001ULL },
  25     { 0x1122334455667788ull, 0x8877665544332211ull,
  26       0x092228fb777ae38full, 0x0a3e963337c60008ull },
  27 };
  28
  29 static const Test test_s_data[] = {
  30     { 1, 1, 0, 1 },
  31     { 1, -1, -1, -1 },
  32     { -10, -10, 0, 100 },
  33     { 10000, 10000, 0, 100000000 },
  34     { -1, 2, -1, -2 },
  35     { 0x1122334455667788ULL, 0x1122334455667788ULL,
  36       0x01258f60bbc2975cULL, 0x1eace4a3c82fb840ULL },
  37 };
  38
  39 static void test_u(void)
  40 {
  41     int i;
  42
  43     for (i = 0; i < ARRAY_SIZE(test_u_data); ++i) {
  44         uint64_t rl, rh;
  45         mulu64(&rl, &rh, test_u_data[i].a, test_u_data[i].b);
  46         g_assert_cmpuint(rl, ==, test_u_data[i].rl);
  47         g_assert_cmpuint(rh, ==, test_u_data[i].rh);
  48     }
  49 }
  50
  51 static void test_s(void)
  52 {
  53     int i;
  54
  55     for (i = 0; i < ARRAY_SIZE(test_s_data); ++i) {
  56         uint64_t rl, rh;
  57         muls64(&rl, &rh, test_s_data[i].a, test_s_data[i].b);
  58         g_assert_cmpuint(rl, ==, test_s_data[i].rl);
  59         g_assert_cmpint(rh, ==, test_s_data[i].rh);
  60     }
  61 }
  62
  63 int main(int argc, char **argv)
  64 {
  65     g_test_init(&argc, &argv, NULL);
  66     g_test_add_func("/host-utils/mulu64", test_u);
  67     g_test_add_func("/host-utils/muls64", test_s);
  68     return g_test_run();
  69 }