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