除算器 | Codetter（こーどったー）

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// div_u8.v
module div_u8 (
    n, d, q, r
);
    input [7:0] n, d;
    output [7:0] q, r;
    assign q = n / d;
    assign r = n % d;
endmodule
// div_8.sflp
declare div_u8 interface
{
    input n<8>, d<8>;
    output q<8>, r<8>;
}
circuit div_8
{
    input n<8>, d<8>;
    output q<8>, r<8>;
    instrin u(n, d), s(n, d);
    div_u8 div;
    instruct u par{ // unsigned div
        div.n = n;
        div.d = d;
        q = div.q;
        r = div.r;
    }
    instruct s par{ // signed div
        if(n<7>) div.n = -n;
        else div.n = n;
        if(d<7>) div.d = -d;
        else div.d = d;
        if(n<7>@d<7>) q = -div.q;
        else q = div.q;
        if(n<7>) r = -div.r;
        else r = div.r;
    }
}
// div_test.cpp
#include<stdio.h>
#include "Vdiv_8.h"
int main(void)
{
    Vdiv_8 *div = new Vdiv_8;
    int n, d;
    unsigned char q, r;
    for (n = 0; n < 256; n++){
        for (d = 1; d < 256; d++){
            div->n = n;
            div->d = d;
            div->u = 1;
            div->s = 0;
            div->eval();
            printf("H %02X / %02X = %02X . %02X\n", n, d, div->q, div->r);
            q = (unsigned char)n / (unsigned char)d;
            r = (unsigned char)n % (unsigned char)d;
            printf("U %02X / %02X = %02X . %02X\n", n, d, q, r);
            if (div->q != q || div->r != r){
                printf("err\n");
                getchar();
            }
            div->u = 0;
            div->s = 1;
            div->eval();
            printf("H %02X / %02X = %02X . %02X\n", n, d, div->q, div->r);
            q = (signed char)n / (signed char)d;
            r = (signed char)n % (signed char)d;
            printf("S %02X / %02X = %02X . %02X\n", n, d, q, r);
            if (div->q != q || div->r != r){
                printf("err\n");
                getchar();
            }
            printf("\n");
        }
    }
    div->final();
    delete div;
    return 0;
}
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