1
2
3
4
5#include <stdio.h>
6#include <inttypes.h>
7#include <assert.h>
8
9struct quotient_remainder { uint32_t quotient, remainder; };
10
11static 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
28static 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
38int 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
