Subversion Repositories dblclockfft

#include <stdio.h>

#include <stdint.h>

#include "Vbutterfly.h"

#include "verilated.h"

void    tick(Vbutterfly *bfly) {

        bfly->i_clk = 0;

        bfly->eval();

        bfly->i_clk = 1;

        bfly->eval();

}

void    reset(Vbutterfly *bfly) {

        bfly->i_ce  = 0;

        bfly->i_rst = 1;

        tick(bfly);

        bfly->i_ce  = 0;

        bfly->i_rst = 0;

        tick(bfly);

}

int     main(int argc, char **argv, char **envp) {

        Verilated::commandArgs(argc, argv);

        Vbutterfly      *bfly = new Vbutterfly;

        int16_t         ir0, ii0, lstr, lsti;

        int32_t         sumr, sumi, difr, difi;

        int32_t         smr, smi, dfr, dfi;

        int             rnd = 0;

        reset(bfly);

        for(int k=0; k<270; k++) {

                int32_t or0, oi0, or1, oi1;

                bfly->i_ce = 1;

                bfly->i_sync = ((k&0x0ff)==0);

                // Let's pick some random values, ...

                ir0 = rand(); if (ir0&4) ir0 = -ir0;

                ii0 = rand(); if (ii0&2) ii0 = -ii0;

                bfly->i_data  = ((ir0&0x0ffff) << 16) | (ii0 & 0x0ffff);

                tick(bfly);

                printf("k=%3d: COEF=%08x, LFT=%08x, RHT=%08x, AUX=%d, OLFT =%09lx, ORHT=%09lx, AUX=%d\n",

                        k, bfly->i_coef, bfly->i_left, bfly->i_right, bfly->i_aux,

                        bfly->o_left, bfly->o_right, bfly->o_sync);

                or0 = (bfly->o_data  >> 17) & 0x01ffff;

                oi0 =  bfly->o_data         & 0x01ffff;

                if (or0 & 0x010000)     or0 |= (-1<<16);

                if (oi0 & 0x010000)     oi0 |= (-1<<16);

                if (k>3) {

                        /*

                        printf("\tOR0 = %6x, OI0 = %6x, SUM = %6x + %6x, DIF = %6x + %6x\n",

                                or0, oi0, sumr, sumi, difr, difi);

                        */

                        if (0==(k&1)) {

                                if (or0 != sumr)        {fprintf(stderr, "FAIL 1\n"); exit(-1);}

                                if (oi0 != sumi)        {fprintf(stderr, "FAIL 2\n"); exit(-1);}

                        } else if (1==(k&1)) {

                                if (or0 != difr)        {fprintf(stderr, "FAIL 3\n"); exit(-1);}

                                if (oi0 != difi)        {fprintf(stderr, "FAIL 4\n"); exit(-1);}

                        }

                }

                if (((4==(k&0x0ff))?1:0) != bfly->o_sync) { fprintf(stderr, "BAD O-SYNC\n"); exit(-1); }

                if (1 == (k&1)) {

                        sumr = smr; sumi = smi; difr=dfr, difi= dfi;

                        smr = lstr + ir0 + rnd;

                        smi = lsti + ii0 + rnd;

                        dfr = lstr - ir0 + rnd;

                        dfi = lsti - ii0 + rnd;

                }

                lstr = ir0;

                lsti = ii0;

        }

        delete  bfly;

        printf("SUCCESS!\n");

        exit(0);

}