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 }
49