__divrem_u64_t wrap_divrem_u64(uint64_t dividend, uint64_t divisor) {
     __divrem_u64_t out;
    asm(".extern ___divrem_u64;"
      "r0 = %2L;"
        "r1 = %2H;"
        "r2 = %3L;"
        "r3 = %3H;"
        "[--sp] = r3;"
        "[--sp] = r2;"
        "[--sp] = r1;"
        "[--sp] = r0;"      // Wants a minimal stack frame for scratch space
        "call ___divrem_u64;"
        "sp += 16;"
        "%0L = r0;"
        "%0H = r1;"
        "%1L = r2;"
        "%1H = r3;"
        : "=I"(out.quo),"=I"(out.rem)   // Outputs
        : "I"(dividend),"I"(divisor)                // Inputs
        // Clobbers (includes those clobbered by ___divrem_u64)
        : "r0","r1","r2","r3","p0","p1","p2","lc0","lt0","lb0","cc"
        );
    return out;
};