tests/tcg/mips/mipsr5900/maddu.c


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/*
 * Test R5900-specific three-operand MADDU.
 */

#include <stdio.h>
#include <inttypes.h>
#include <assert.h>

uint64_t maddu(uint64_t a, uint32_t rs, uint32_t rt)
{
    uint32_t lo = a;
    uint32_t hi = a >> 32;
    uint32_t rd;
    uint64_t r;

    __asm__ __volatile__ (
            "    mtlo  %5\n"
            "    mthi  %6\n"
            "    maddu %0, %3, %4\n"
            "    mflo  %1\n"
            "    mfhi  %2\n"
            : "=r" (rd), "=r" (lo), "=r" (hi)
            : "r" (rs), "r" (rt), "r" (lo), "r" (hi));
    r = ((uint64_t)hi << 32) | (uint32_t)lo;

    assert(a + (uint64_t)rs * rt == r);
    assert(rd == lo);

    return r;
}

int main()
{
    assert(maddu(13, 17, 19) == 336);

    return 0;
}