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 <glib.h>
  10 #include <stdint.h>
  11 #include "qemu/host-utils.h"
  12 #include "qemu/osdep.h"
  13
  14
  15 typedef struct {
  16     uint64_t a, b;
  17     uint64_t rh, rl;
  18 } Test;
  19
  20 static const Test test_u_data[] = {
  21     { 1, 1, 0, 1 },
  22     { 10000, 10000, 0, 100000000 },
  23     { 0xffffffffffffffffULL, 2, 1, 0xfffffffffffffffeULL },
  24     { 0xffffffffffffffffULL, 0xffffffffffffffffULL,
  25       0xfffffffffffffffeULL, 0x0000000000000001ULL },
  26     { 0x1122334455667788ull, 0x8877665544332211ull,
  27       0x092228fb777ae38full, 0x0a3e963337c60008ull },
  28 };
  29
  30 static const Test test_s_data[] = {
  31     { 1, 1, 0, 1 },
  32     { 1, -1, -1, -1 },
  33     { -10, -10, 0, 100 },
  34     { 10000, 10000, 0, 100000000 },
  35     { -1, 2, -1, -2 },
  36     { 0x1122334455667788ULL, 0x1122334455667788ULL,
  37       0x01258f60bbc2975cULL, 0x1eace4a3c82fb840ULL },
  38 };
  39
  40 static void test_u(void)
  41 {
  42     int i;
  43
  44     for (i = 0; i < ARRAY_SIZE(test_u_data); ++i) {
  45         uint64_t rl, rh;
  46         mulu64(&rl, &rh, test_u_data[i].a, test_u_data[i].b);
  47         g_assert_cmpuint(rl, ==, test_u_data[i].rl);
  48         g_assert_cmpuint(rh, ==, test_u_data[i].rh);
  49     }
  50 }
  51
  52 static void test_s(void)
  53 {
  54     int i;
  55
  56     for (i = 0; i < ARRAY_SIZE(test_s_data); ++i) {
  57         uint64_t rl, rh;
  58         muls64(&rl, &rh, test_s_data[i].a, test_s_data[i].b);
  59         g_assert_cmpuint(rl, ==, test_s_data[i].rl);
  60         g_assert_cmpint(rh, ==, test_s_data[i].rh);
  61     }
  62 }
  63
  64 int main(int argc, char **argv)
  65 {
  66     g_test_init(&argc, &argv, NULL);
  67     g_test_add_func("/host-utils/mulu64", test_u);
  68     g_test_add_func("/host-utils/muls64", test_s);
  69     return g_test_run();
  70 }