tests/tcg/mips/user/isa/r5900/test_r5900_divu1.c

   1 /*
   2  * Test R5900-specific DIVU1.
   3  */
   4
   5 #include <stdio.h>
   6 #include <inttypes.h>
   7 #include <assert.h>
   8
   9 struct quotient_remainder { uint32_t quotient, remainder; };
  10
  11 static struct quotient_remainder divu1(uint32_t rs, uint32_t rt)
  12 {
  13     uint32_t lo, hi;
  14
  15     __asm__ __volatile__ (
  16             "    divu1 $0, %2, %3\n"
  17             "    mflo1 %0\n"
  18             "    mfhi1 %1\n"
  19             : "=r" (lo), "=r" (hi)
  20             : "r" (rs), "r" (rt));
  21
  22     assert(rs / rt == lo);
  23     assert(rs % rt == hi);
  24
  25     return (struct quotient_remainder) { .quotient = lo, .remainder = hi };
  26 }
  27
  28 static void verify_divu1(uint32_t rs, uint32_t rt,
  29                          uint32_t expected_quotient,
  30                          uint32_t expected_remainder)
  31 {
  32     struct quotient_remainder qr = divu1(rs, rt);
  33
  34     assert(qr.quotient == expected_quotient);
  35     assert(qr.remainder == expected_remainder);
  36 }
  37
  38 int main()
  39 {
  40     verify_divu1(0, 1, 0, 0);
  41     verify_divu1(1, 1, 1, 0);
  42     verify_divu1(1, 2, 0, 1);
  43     verify_divu1(17, 19, 0, 17);
  44     verify_divu1(19, 17, 1, 2);
  45     verify_divu1(77773, 101, 770, 3);
  46
  47     return 0;
  48 }