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/*
* Test R5900-specific DIVU1.
*/
#include <stdio.h>
#include <inttypes.h>
#include <assert.h>
struct quotient_remainder { uint32_t quotient, remainder; };
static struct quotient_remainder divu1(uint32_t rs, uint32_t rt)
{
uint32_t lo, hi;
__asm__ __volatile__ (
" divu1 $0, %2, %3\n"
" mflo1 %0\n"
" mfhi1 %1\n"
: "=r" (lo), "=r" (hi)
: "r" (rs), "r" (rt));
assert(rs / rt == lo);
assert(rs % rt == hi);
return (struct quotient_remainder) { .quotient = lo, .remainder = hi };
}
static void verify_divu1(uint32_t rs, uint32_t rt,
uint32_t expected_quotient,
uint32_t expected_remainder)
{
struct quotient_remainder qr = divu1(rs, rt);
assert(qr.quotient == expected_quotient);
assert(qr.remainder == expected_remainder);
}
int main()
{
verify_divu1(0, 1, 0, 0);
verify_divu1(1, 1, 1, 0);
verify_divu1(1, 2, 0, 1);
verify_divu1(17, 19, 0, 17);
verify_divu1(19, 17, 1, 2);
verify_divu1(77773, 101, 770, 3);
return 0;
}
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