tests/tcg/sh4/test-macw.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <stdint.h>
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6
   7 int64_t mac_w(int64_t mac, const int16_t *a, const int16_t *b)
   8 {
   9     register uint32_t macl __asm__("macl") = mac;
  10     register uint32_t mach __asm__("mach") = mac >> 32;
  11
  12     asm volatile("mac.w @%0+,@%1+"
  13                  : "+r"(a), "+r"(b), "+x"(macl), "+x"(mach));
  14
  15     return ((uint64_t)mach << 32) | macl;
  16 }
  17
  18 typedef struct {
  19     int64_t mac;
  20     int16_t a, b;
  21     int64_t res[2];
  22 } Test;
  23
  24 __attribute__((noinline))
  25 void test(const Test *t, int sat)
  26 {
  27     int64_t res;
  28
  29     if (sat) {
  30         asm volatile("sets");
  31     } else {
  32         asm volatile("clrs");
  33     }
  34     res = mac_w(t->mac, &t->a, &t->b);
  35
  36     if (res != t->res[sat]) {
  37         fprintf(stderr, "%#llx + (%#x * %#x) = %#llx -- got %#llx\n",
  38                 t->mac, t->a, t->b, t->res[sat], res);
  39         abort();
  40     }
  41 }
  42
  43 int main()
  44 {
  45     static const Test tests[] = {
  46         { 0, 2, 3, { 6, 6 } },
  47         { 0x123456787ffffffell, 2, -3,
  48           { 0x123456787ffffff8ll, 0x123456787ffffff8ll } },
  49         { 0xabcdef127ffffffall, 2, 3,
  50           { 0xabcdef1280000000ll, 0x000000017fffffffll } },
  51         { 0xfffffffffll, INT16_MAX, INT16_MAX,
  52           { 0x103fff0000ll, 0xf3fff0000ll } },
  53     };
  54
  55     for (int i = 0; i < sizeof(tests) / sizeof(tests[0]); ++i) {
  56         for (int j = 0; j < 2; ++j) {
  57             test(&tests[i], j);
  58         }
  59     }
  60     return 0;
  61 }