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https://github.com/verilator/verilator.git
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133 lines
3.9 KiB
C++
133 lines
3.9 KiB
C++
// -*- mode: C++; c-file-style: "cc-mode" -*-
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//*************************************************************************
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// DESCRIPTION: Verilator: Emit C++ for tree
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//
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// Code available from: http://www.veripool.org/verilator
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//
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//*************************************************************************
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//
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// Copyright 2003-2016 by Wilson Snyder. This program is free software; you can
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// redistribute it and/or modify it under the terms of either the GNU
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// Lesser General Public License Version 3 or the Perl Artistic License
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// Version 2.0.
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//
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// Verilator is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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//*************************************************************************
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#include "config_build.h"
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#include "verilatedos.h"
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#include <cstdio>
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#include <cstdarg>
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#include <unistd.h>
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#include <cmath>
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#include <map>
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#include <vector>
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#include "V3Global.h"
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#include "V3EmitC.h"
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#include "V3EmitCBase.h"
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#include "V3Stats.h"
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#define EMITCINLINES_NUM_CONSTW 10 // Number of VL_CONST_W_*X's in verilated.h (IE VL_CONST_W_9X is last)
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//######################################################################
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class EmitCInlines : EmitCBaseVisitor {
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// STATE
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vector<V3Double0> m_wordWidths; // What sizes are used?
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// METHODS
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void emitInt();
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// VISITORS
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virtual void visit(AstVar* nodep, AstNUser*) {
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// All wide constants load into variables, so we can just hunt for them
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nodep->iterateChildren(*this);
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int words = nodep->widthWords();
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if (words >= EMITCINLINES_NUM_CONSTW ) {
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if (int(m_wordWidths.size()) <= words) {
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m_wordWidths.resize(words+5);
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}
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++ m_wordWidths.at(words);
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v3Global.needHInlines(true);
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}
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}
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virtual void visit(AstBasicDType* nodep, AstNUser*) {
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if (nodep->keyword() == AstBasicDTypeKwd::STRING) {
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v3Global.needHeavy(true); // #include <string> via verilated_heavy.h when we create symbol file
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}
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}
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// NOPs
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virtual void visit(AstNodeStmt*, AstNUser*) {}
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// Default
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virtual void visit(AstNode* nodep, AstNUser*) {
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nodep->iterateChildren(*this);
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}
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//---------------------------------------
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// ACCESSORS
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public:
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explicit EmitCInlines(AstNetlist* nodep) {
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nodep->accept(*this);
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if (v3Global.needHInlines()) {
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emitInt();
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}
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}
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};
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void EmitCInlines::emitInt() {
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string filename = v3Global.opt.makeDir()+"/"+topClassName()+"__Inlines.h";
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newCFile(filename, false/*slow*/, false/*source*/);
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V3OutCFile hf (filename);
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m_ofp = &hf;
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ofp()->putsHeader();
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puts("#ifndef _"+topClassName()+"__Inlines_H_\n");
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puts("#define _"+topClassName()+"__Inlines_H_\n");
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puts("\n");
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puts("#include \"verilated.h\"\n");
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puts("\n//======================\n\n");
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for (unsigned words=0; words<m_wordWidths.size(); words++) {
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if (m_wordWidths.at(words)) {
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puts("#ifndef VL_HAVE_CONST_W_"+cvtToStr(words)+"X\n");
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puts("# define VL_HAVE_CONST_W_"+cvtToStr(words)+"X\n");
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puts("static inline WDataOutP VL_CONST_W_"+cvtToStr(words)+"X(int obits, WDataOutP o\n");
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puts("\t");
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for (int i=words-1; i>=0; --i) {
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puts(",IData d"+cvtToStr(i));
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if (i && (i % 8 == 0)) puts("\n\t");
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}
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puts(") {\n");
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puts(" ");
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for (int i=words-1; i>=0; --i) {
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puts(" o["+cvtToStr(i)+"]=d"+cvtToStr(i)+";");
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if (i && (i % 8 == 0)) puts("\n ");
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}
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puts("\n");
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puts(" for(int i="+cvtToStr(words)+";i<VL_WORDS_I(obits);i++) o[i] = (IData)0x0;\n");
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puts(" return o;\n");
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puts("}\n");
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puts("#endif\n");
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puts("\n");
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}
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}
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puts("//======================\n\n");
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puts("#endif /*guard*/\n");
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}
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//######################################################################
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// EmitC class functions
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void V3EmitC::emitcInlines() {
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UINFO(2,__FUNCTION__<<": "<<endl);
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EmitCInlines syms (v3Global.rootp());
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}
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