memory.cc

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/*
 *  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>

USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN

struct MemoryPass : public Pass {
    MemoryPass() : Pass("memory", "translate memories to basic cells") { }
    virtual void help()
    {
        //   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
        log("\n");
        log("    memory [-nomap] [selection]\n");
        log("\n");
        log("This pass calls all the other memory_* passes in a useful order:\n");
        log("\n");
        log("    memory_dff\n");
        log("    opt_clean\n");
        log("    memory_share\n");
        log("    opt_clean\n");
        log("    memory_collect\n");
        log("    memory_map          (skipped if called with -nomap)\n");
        log("\n");
        log("This converts memories to word-wide DFFs and address decoders\n");
        log("or multiport memory blocks if called with the -nomap option.\n");
        log("\n");
    }
    virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
    {
        bool flag_nomap = false;

        log_header("Executing MEMORY pass.\n");
        log_push();

        size_t argidx;
        for (argidx = 1; argidx < args.size(); argidx++) {
            if (args[argidx] == "-nomap") {
                flag_nomap = true;
                continue;
            }
            break;
        }
        extra_args(args, argidx, design);

        Pass::call(design, "memory_dff");
        Pass::call(design, "opt_clean");
        Pass::call(design, "memory_share");
        Pass::call(design, "opt_clean");
        Pass::call(design, "memory_collect");

        if (!flag_nomap)
            Pass::call(design, "memory_map");

        log_pop();
    }
} MemoryPass;
 
PRIVATE_NAMESPACE_END