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/*
* Copyright 2024 Peter McGoron
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <memory>
#include <limits>
#include <cstdint>
#include <iostream>
#include <verilated.h>
#include "Vxorshift.h"
Vxorshift *mod;
static void run_clock() {
mod->clk = !mod->clk;
mod->eval();
mod->clk = !mod->clk;
mod->eval();
}
static uint64_t xorshift_64() {
static uint64_t state = 88172645463325252LL;
state ^= state << 13;
state ^= state >> 7;
return state ^= state << 17;
}
int main(int argc, char **argv) {
Verilated::commandArgs(argc, argv);
mod = new Vxorshift;
mod->clk = 0;
mod->eval();
for (int i = 0; i < 100000; i++) {
uint64_t correct = xorshift_64();
run_clock();
if (correct != mod->data) {
std::cout << i << " " << correct << "!=" << mod->data << std::endl;
}
}
mod->final();
delete mod;
return 0;
}
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