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
divu1(uint32_t rs,uint32_t rt)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
verify_divu1(uint32_t rs,uint32_t rt,uint32_t expected_quotient,uint32_t expected_remainder)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
main()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