tests/tcg/riscv64/test-div.c

   1 #include <assert.h>
   2 #include <limits.h>
   3
   4 struct TestS {
   5     long x, y, q, r;
   6 };
   7
   8 static struct TestS test_s[] = {
   9     { 4, 2, 2, 0 },                 /* normal cases */
  10     { 9, 7, 1, 2 },
  11     { 0, 0, -1, 0 },                /* div by zero cases */
  12     { 9, 0, -1, 9 },
  13     { LONG_MIN, -1, LONG_MIN, 0 },  /* overflow case */
  14 };
  15
  16 struct TestU {
  17     unsigned long x, y, q, r;
  18 };
  19
  20 static struct TestU test_u[] = {
  21     { 4, 2, 2, 0 },                 /* normal cases */
  22     { 9, 7, 1, 2 },
  23     { 0, 0, ULONG_MAX, 0 },         /* div by zero cases */
  24     { 9, 0, ULONG_MAX, 9 },
  25 };
  26
  27 #define ARRAY_SIZE(X)  (sizeof(X) / sizeof(*(X)))
  28
  29 int main (void)
  30 {
  31     int i;
  32
  33     for (i = 0; i < ARRAY_SIZE(test_s); i++) {
  34         long q, r;
  35
  36         asm("div %0, %2, %3\n\t"
  37             "rem %1, %2, %3"
  38             : "=&r" (q), "=r" (r)
  39             : "r" (test_s[i].x), "r" (test_s[i].y));
  40
  41         assert(q == test_s[i].q);
  42         assert(r == test_s[i].r);
  43     }
  44
  45     for (i = 0; i < ARRAY_SIZE(test_u); i++) {
  46         unsigned long q, r;
  47
  48         asm("divu %0, %2, %3\n\t"
  49             "remu %1, %2, %3"
  50             : "=&r" (q), "=r" (r)
  51             : "r" (test_u[i].x), "r" (test_u[i].y));
  52
  53         assert(q == test_u[i].q);
  54         assert(r == test_u[i].r);
  55     }
  56
  57     return 0;
  58 }