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 "qemu/host-utils.h"
  11
  12
  13 typedef struct {
  14     uint64_t a, b;
  15     uint64_t rh, rl;
  16 } Test;
  17
  18 static const Test test_u_data[] = {
  19     { 1, 1, 0, 1 },
  20     { 10000, 10000, 0, 100000000 },
  21     { 0xffffffffffffffffULL, 2, 1, 0xfffffffffffffffeULL },
  22     { 0xffffffffffffffffULL, 0xffffffffffffffffULL,
  23       0xfffffffffffffffeULL, 0x0000000000000001ULL },
  24     { 0x1122334455667788ull, 0x8877665544332211ull,
  25       0x092228fb777ae38full, 0x0a3e963337c60008ull },
  26 };
  27
  28 static const Test test_s_data[] = {
  29     { 1, 1, 0, 1 },
  30     { 1, -1, -1, -1 },
  31     { -10, -10, 0, 100 },
  32     { 10000, 10000, 0, 100000000 },
  33     { -1, 2, -1, -2 },
  34     { 0x1122334455667788ULL, 0x1122334455667788ULL,
  35       0x01258f60bbc2975cULL, 0x1eace4a3c82fb840ULL },
  36 };
  37
  38 static void test_u(void)
  39 {
  40     int i;
  41
  42     for (i = 0; i < ARRAY_SIZE(test_u_data); ++i) {
  43         uint64_t rl, rh;
  44         mulu64(&rl, &rh, test_u_data[i].a, test_u_data[i].b);
  45         g_assert_cmpuint(rl, ==, test_u_data[i].rl);
  46         g_assert_cmpuint(rh, ==, test_u_data[i].rh);
  47     }
  48 }
  49
  50 static void test_s(void)
  51 {
  52     int i;
  53
  54     for (i = 0; i < ARRAY_SIZE(test_s_data); ++i) {
  55         uint64_t rl, rh;
  56         muls64(&rl, &rh, test_s_data[i].a, test_s_data[i].b);
  57         g_assert_cmpuint(rl, ==, test_s_data[i].rl);
  58         g_assert_cmpint(rh, ==, test_s_data[i].rh);
  59     }
  60 }
  61
  62 int main(int argc, char **argv)
  63 {
  64     g_test_init(&argc, &argv, NULL);
  65     g_test_add_func("/host-utils/mulu64", test_u);
  66     g_test_add_func("/host-utils/muls64", test_s);
  67     return g_test_run();
  68 }