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-rw-r--r--backends/autotest/autotest.cc336
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diff --git a/backends/autotest/autotest.cc b/backends/autotest/autotest.cc
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index 3e2fab006..000000000
--- a/backends/autotest/autotest.cc
+++ /dev/null
@@ -1,336 +0,0 @@
-/*
- * yosys -- Yosys Open SYnthesis Suite
- *
- * Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-
-#include "kernel/register.h"
-#include "kernel/log.h"
-#include <stdlib.h>
-#include <stdio.h>
-
-#define NUM_ITER 1000
-
-static std::string id(std::string internal_id)
-{
- const char *str = internal_id.c_str();
- bool do_escape = false;
-
- if (*str == '\\')
- str++;
-
- if ('0' <= *str && *str <= '9')
- do_escape = true;
-
- for (int i = 0; str[i]; i++) {
- if ('0' <= str[i] && str[i] <= '9')
- continue;
- if ('a' <= str[i] && str[i] <= 'z')
- continue;
- if ('A' <= str[i] && str[i] <= 'Z')
- continue;
- if (str[i] == '_')
- continue;
- do_escape = true;
- break;
- }
-
- if (do_escape)
- return "\\" + std::string(str) + " ";
- return std::string(str);
-}
-
-static std::string idx(std::string str)
-{
- if (str[0] == '\\')
- return str.substr(1);
- return str;
-}
-
-static std::string idy(std::string str1, std::string str2 = std::string(), std::string str3 = std::string())
-{
- str1 = idx(str1);
- if (!str2.empty())
- str1 += "_" + idx(str2);
- if (!str3.empty())
- str1 += "_" + idx(str3);
- return id(str1);
-}
-
-static void autotest(FILE *f, RTLIL::Design *design)
-{
- fprintf(f, "module testbench;\n\n");
-
- fprintf(f, "integer i;\n\n");
-
- fprintf(f, "reg [31:0] xorshift128_x = 123456789;\n");
- fprintf(f, "reg [31:0] xorshift128_y = 362436069;\n");
- fprintf(f, "reg [31:0] xorshift128_z = 521288629;\n");
- fprintf(f, "reg [31:0] xorshift128_w = 88675123;\n");
- fprintf(f, "reg [31:0] xorshift128_t;\n\n");
- fprintf(f, "task xorshift128;\n");
- fprintf(f, "begin\n");
- fprintf(f, "\txorshift128_t = xorshift128_x ^ (xorshift128_x << 11);\n");
- fprintf(f, "\txorshift128_x = xorshift128_y;\n");
- fprintf(f, "\txorshift128_y = xorshift128_z;\n");
- fprintf(f, "\txorshift128_z = xorshift128_w;\n");
- fprintf(f, "\txorshift128_w = xorshift128_w ^ (xorshift128_w >> 19) ^ xorshift128_t ^ (xorshift128_t >> 8);\n");
- fprintf(f, "end\n");
- fprintf(f, "endtask\n\n");
-
- for (auto it = design->modules.begin(); it != design->modules.end(); it++)
- {
- std::map<std::string, int> signal_in;
- std::map<std::string, std::string> signal_const;
- std::map<std::string, int> signal_clk;
- std::map<std::string, int> signal_out;
-
- RTLIL::Module *mod = it->second;
-
- if (mod->get_bool_attribute("\\gentb_skip"))
- continue;
-
- int count_ports = 0;
- log("Generating test bench for module `%s'.\n", it->first.c_str());
- for (auto it2 = mod->wires.begin(); it2 != mod->wires.end(); it2++) {
- RTLIL::Wire *wire = it2->second;
- if (wire->port_output) {
- count_ports++;
- signal_out[idy("sig", mod->name, wire->name)] = wire->width;
- fprintf(f, "wire [%d:0] %s;\n", wire->width-1, idy("sig", mod->name, wire->name).c_str());
- } else if (wire->port_input) {
- count_ports++;
- bool is_clksignal = wire->get_bool_attribute("\\gentb_clock");
- for (auto it3 = mod->processes.begin(); it3 != mod->processes.end(); it3++)
- for (auto it4 = it3->second->syncs.begin(); it4 != it3->second->syncs.end(); it4++) {
- if ((*it4)->type == RTLIL::ST0 || (*it4)->type == RTLIL::ST1)
- continue;
- RTLIL::SigSpec &signal = (*it4)->signal;
- for (size_t i = 0; i < signal.chunks.size(); i++) {
- if (signal.chunks[i].wire == wire)
- is_clksignal = true;
- }
- }
- if (is_clksignal && wire->attributes.count("\\gentb_constant") == 0) {
- signal_clk[idy("sig", mod->name, wire->name)] = wire->width;
- } else {
- signal_in[idy("sig", mod->name, wire->name)] = wire->width;
- if (wire->attributes.count("\\gentb_constant") != 0)
- signal_const[idy("sig", mod->name, wire->name)] = wire->attributes["\\gentb_constant"].as_string();
- }
- fprintf(f, "reg [%d:0] %s;\n", wire->width-1, idy("sig", mod->name, wire->name).c_str());
- }
- }
- fprintf(f, "%s %s(\n", id(mod->name).c_str(), idy("uut", mod->name).c_str());
- for (auto it2 = mod->wires.begin(); it2 != mod->wires.end(); it2++) {
- RTLIL::Wire *wire = it2->second;
- if (wire->port_output || wire->port_input)
- fprintf(f, "\t.%s(%s)%s\n", id(wire->name).c_str(),
- idy("sig", mod->name, wire->name).c_str(), --count_ports ? "," : "");
- }
- fprintf(f, ");\n\n");
-
- fprintf(f, "task %s;\n", idy(mod->name, "reset").c_str());
- fprintf(f, "begin\n");
- int delay_counter = 0;
- for (auto it = signal_in.begin(); it != signal_in.end(); it++)
- fprintf(f, "\t%s <= #%d 0;\n", it->first.c_str(), ++delay_counter*2);
- for (auto it = signal_clk.begin(); it != signal_clk.end(); it++)
- fprintf(f, "\t%s <= #%d 0;\n", it->first.c_str(), ++delay_counter*2);
- for (auto it = signal_clk.begin(); it != signal_clk.end(); it++) {
- fprintf(f, "\t#100; %s <= 1;\n", it->first.c_str());
- fprintf(f, "\t#100; %s <= 0;\n", it->first.c_str());
- }
- delay_counter = 0;
- for (auto it = signal_in.begin(); it != signal_in.end(); it++)
- fprintf(f, "\t%s <= #%d ~0;\n", it->first.c_str(), ++delay_counter*2);
- for (auto it = signal_clk.begin(); it != signal_clk.end(); it++) {
- fprintf(f, "\t#100; %s <= 1;\n", it->first.c_str());
- fprintf(f, "\t#100; %s <= 0;\n", it->first.c_str());
- }
- delay_counter = 0;
- for (auto it = signal_in.begin(); it != signal_in.end(); it++) {
- if (signal_const.count(it->first) == 0)
- continue;
- fprintf(f, "\t%s <= #%d 'b%s;\n", it->first.c_str(), ++delay_counter*2, signal_const[it->first].c_str());
- }
- fprintf(f, "end\n");
- fprintf(f, "endtask\n\n");
-
- fprintf(f, "task %s;\n", idy(mod->name, "update_data").c_str());
- fprintf(f, "begin\n");
- delay_counter = 0;
- for (auto it = signal_in.begin(); it != signal_in.end(); it++) {
- if (signal_const.count(it->first) > 0)
- continue;
- fprintf(f, "\txorshift128;\n");
- fprintf(f, "\t%s <= #%d { xorshift128_x, xorshift128_y, xorshift128_z, xorshift128_w };\n", it->first.c_str(), ++delay_counter*2);
- }
- fprintf(f, "end\n");
- fprintf(f, "endtask\n\n");
-
- fprintf(f, "task %s;\n", idy(mod->name, "update_clock").c_str());
- fprintf(f, "begin\n");
- if (signal_clk.size()) {
- fprintf(f, "\txorshift128;\n");
- fprintf(f, "\t{");
- int total_clock_bits = 0;
- for (auto it = signal_clk.begin(); it != signal_clk.end(); it++) {
- fprintf(f, "%s %s", it == signal_clk.begin() ? "" : ",", it->first.c_str());
- total_clock_bits += it->second;
- }
- fprintf(f, " } = {");
- for (auto it = signal_clk.begin(); it != signal_clk.end(); it++)
- fprintf(f, "%s %s", it == signal_clk.begin() ? "" : ",", it->first.c_str());
- fprintf(f, " } ^ (%d'b1 << (xorshift128_w %% %d));\n", total_clock_bits, total_clock_bits);
- }
- fprintf(f, "end\n");
- fprintf(f, "endtask\n\n");
-
- char shorthand = 'A';
- std::vector<std::string> header1;
- std::string header2 = "";
-
- fprintf(f, "task %s;\n", idy(mod->name, "print_status").c_str());
- fprintf(f, "begin\n");
- fprintf(f, "\t$display(\"#OUT# %%b %%b %%b %%t %%d\", {");
- if (signal_in.size())
- for (auto it = signal_in.begin(); it != signal_in.end(); it++) {
- fprintf(f, "%s %s", it == signal_in.begin() ? "" : ",", it->first.c_str());
- int len = it->second;
- if (len > 1)
- header2 += "/", len--;
- while (len > 1)
- header2 += "-", len--;
- if (len > 0)
- header2 += shorthand, len--;
- header1.push_back(" " + it->first);
- header1.back()[0] = shorthand++;
- }
- else {
- fprintf(f, " 1'bx");
- header2 += "#";
- }
- fprintf(f, " }, {");
- header2 += " ";
- if (signal_clk.size()) {
- for (auto it = signal_clk.begin(); it != signal_clk.end(); it++) {
- fprintf(f, "%s %s", it == signal_clk.begin() ? "" : ",", it->first.c_str());
- int len = it->second;
- if (len > 1)
- header2 += "/", len--;
- while (len > 1)
- header2 += "-", len--;
- if (len > 0)
- header2 += shorthand, len--;
- header1.push_back(" " + it->first);
- header1.back()[0] = shorthand++;
- }
- } else {
- fprintf(f, " 1'bx");
- header2 += "#";
- }
- fprintf(f, " }, {");
- header2 += " ";
- if (signal_out.size()) {
- for (auto it = signal_out.begin(); it != signal_out.end(); it++) {
- fprintf(f, "%s %s", it == signal_out.begin() ? "" : ",", it->first.c_str());
- int len = it->second;
- if (len > 1)
- header2 += "/", len--;
- while (len > 1)
- header2 += "-", len--;
- if (len > 0)
- header2 += shorthand, len--;
- header1.push_back(" " + it->first);
- header1.back()[0] = shorthand++;
- }
- } else {
- fprintf(f, " 1'bx");
- header2 += "#";
- }
- fprintf(f, " }, $time, i);\n");
- fprintf(f, "end\n");
- fprintf(f, "endtask\n\n");
-
- fprintf(f, "task %s;\n", idy(mod->name, "print_header").c_str());
- fprintf(f, "begin\n");
- fprintf(f, "\t$display(\"#OUT#\");\n");
- for (auto &hdr : header1)
- fprintf(f, "\t$display(\"#OUT# %s\");\n", hdr.c_str());
- fprintf(f, "\t$display(\"#OUT#\");\n");
- fprintf(f, "\t$display(\"#OUT# %s\");\n", header2.c_str());
- fprintf(f, "end\n");
- fprintf(f, "endtask\n\n");
-
- fprintf(f, "task %s;\n", idy(mod->name, "test").c_str());
- fprintf(f, "begin\n");
- fprintf(f, "\t$display(\"#OUT#\\n#OUT# ==== %s ====\");\n", idy(mod->name).c_str());
- fprintf(f, "\t%s;\n", idy(mod->name, "reset").c_str());
- fprintf(f, "\tfor (i=0; i<%d; i=i+1) begin\n", NUM_ITER);
- fprintf(f, "\t\tif (i %% 20 == 0) %s;\n", idy(mod->name, "print_header").c_str());
- fprintf(f, "\t\t#100; %s;\n", idy(mod->name, "update_data").c_str());
- fprintf(f, "\t\t#100; %s;\n", idy(mod->name, "update_clock").c_str());
- fprintf(f, "\t\t#100; %s;\n", idy(mod->name, "print_status").c_str());
- fprintf(f, "\tend\n");
- fprintf(f, "end\n");
- fprintf(f, "endtask\n\n");
- }
-
- fprintf(f, "initial begin\n");
- fprintf(f, "\t// $dumpfile(\"testbench.vcd\");\n");
- fprintf(f, "\t// $dumpvars(0, testbench);\n");
- for (auto it = design->modules.begin(); it != design->modules.end(); it++)
- if (!it->second->get_bool_attribute("\\gentb_skip"))
- fprintf(f, "\t%s;\n", idy(it->first, "test").c_str());
- fprintf(f, "\t$finish;\n");
- fprintf(f, "end\n\n");
-
- fprintf(f, "endmodule\n");
-}
-
-struct AutotestBackend : public Backend {
- AutotestBackend() : Backend("autotest", "generate simple test benches") { }
- virtual void help()
- {
- // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
- log("\n");
- log(" write_autotest [filename]\n");
- log("\n");
- log("Automatically create primitive verilog test benches for all modules in the\n");
- log("design. The generated testbenches toggle the input pins of the module in\n");
- log("a semi-random manner and dumps the resulting output signals.\n");
- log("\n");
- log("This can be used to check the synthesis results for simple circuits by\n");
- log("comparing the testbench output for the input files and the synthesis results.\n");
- log("\n");
- log("The backend automatically detects clock signals. Additionally a signal can\n");
- log("be forced to be interpreted as clock signal by setting the attribute\n");
- log("'gentb_clock' on the signal.\n");
- log("\n");
- log("The attribute 'gentb_constant' can be used to force a signal to a constant\n");
- log("value after initialization. This can e.g. be used to force a reset signal\n");
- log("low in order to explore more inner states in a state machine.\n");
- log("\n");
- }
- virtual void execute(FILE *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design)
- {
- log_header("Executing AUTOTEST backend (auto-generate pseudo-random test benches).\n");
- extra_args(f, filename, args, 1);
- autotest(f, design);
- }
-} AutotestBackend;
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 17:12:12 +0000