LXR qemu/tests/unit/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
  13typedef struct {
  14    uint64_t a, b;
  15    uint64_t rh, rl;
  16} Test;
  17
  18static 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
  28static 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
  38static 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
  50static 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
  62int 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}
  69