Fix compile error in some oses

git-svn-id: file://localhost/svn/verilator/trunk/verilator@992 77ca24e4-aefa-0310-84f0-b9a241c72d87

Changes

@@ -3,6 +3,20 @@ Revision history for Verilator
 The contributors that suggested a given feature are shown in [].  [by ...]
 indicates the contributor was also the author of the fix; Thanks!
 
+* Verilator 3.658 2008/02/25
+
+**** Fix unistd compile error in 3.657.  [Patricio Kaplan, Jonathan Kimmitt]
+
+* Verilator 3.657 2008/02/20
+
+**** Fix assignments of {a,b,c} = {c,b,a}.  [Jonathan Kimmitt]
+
+**** Fix Perl warning with --lint-only.  [by Ding Xiaoliang]
+
+**** Avoid creating obj_dir with --lint-only.  [Ding Xiaoliang]
+
+**** Fix parsing of always @(*).  [Patricio Kaplan]
+
 * Verilator 3.656 2008/01/18
 
 **** Wide VL_CONST_W_#X functions are now made automatically. [Bernard Deadman]

TODO

@@ -52,6 +52,10 @@ Usability:
 	Better reporting of unopt problems, including what lines of code
 	Report more errors (all of them?) before exiting [Eugene Weber]	
 
+Internal Code:
+	Eliminate the AstNUser* passed to all visitors; its only needed in V3Width,
+	and removing it will speed up and simplify all the other code.
+
 Performance:
 	Constant propagation
 		Extra cleaning AND:  1 & ((VARREF >> 1) | ((&VARREF >> 1) & VARREF))

bin/verilator

@@ -91,6 +91,7 @@ if (! GetOptions (
 		  "sp!"		=> sub {$Opt_Sp = 'sp';},
 		  "sc!"		=> sub {$Opt_Sp = 'sc';},
 		  "cc!"		=> sub {$Opt_Sp = 0;},
+		  "lint-only!"	=> sub {$Opt_Sp = 0;},
 		  #"ignc!"	=> ...,		# Undocumented debugging, disable $c but don't complain
 		  # Additional parameters
 		  "<>"		=> sub {},	# Ignored
@@ -434,7 +435,7 @@ to gcc -MP option.
 =item --Mdir I<directory>
 
 Specifies the name of the Make object directory.  All generated files will
-be placed in this directory.
+be placed in this directory.  If not specified, "obj_dir" is used.
 
 =item --mod-prefix I<topname>
 

src/V3Const.cpp

@@ -39,11 +39,63 @@
 #include "V3Width.h"
 #include "V3Signed.h"
 
+//######################################################################
+// Utilities
+
+class ConstVarMarkVisitor : public AstNVisitor {
+    // NODE STATE
+    // AstVar::userp		-> bool, Var marked, 0=not set yet
+private:
+    // VISITORS
+    virtual void visit(AstVarRef* nodep, AstNUser*) {
+	if (nodep->varp()) nodep->varp()->user(1);
+    }
+    virtual void visit(AstNode* nodep, AstNUser*) {
+	nodep->iterateChildren(*this);
+    }
+public:
+    // CONSTUCTORS
+    ConstVarMarkVisitor(AstNode* nodep) {
+	AstNode::userClearTree();
+	nodep->iterateAndNext(*this, NULL);
+    }
+    virtual ~ConstVarMarkVisitor() {}
+};
+
+class ConstVarFindVisitor : public AstNVisitor {
+    // NODE STATE
+    // AstVar::userp		-> bool, input from ConstVarMarkVisitor
+    // MEMBERS
+    bool m_found;
+private:
+    // VISITORS
+    virtual void visit(AstVarRef* nodep, AstNUser*) {
+	if (nodep->varp() && nodep->varp()->user()) m_found = true;
+    }
+    virtual void visit(AstNode* nodep, AstNUser*) {
+	nodep->iterateChildren(*this);
+    }
+public:
+    // CONSTUCTORS
+    ConstVarFindVisitor(AstNode* nodep) {
+	m_found = false;
+	nodep->iterateAndNext(*this, NULL);
+    }
+    virtual ~ConstVarFindVisitor() {}
+    // METHODS
+    bool found() const { return m_found; }
+};
+
 //######################################################################
 // Const state, as a visitor of each AstNode
 
 class ConstVisitor : public AstNVisitor {
 private:
+    // NODE STATE
+    // ** only when m_warn is set.  If state is needed other times,
+    // ** must track down everywhere V3Const is called and make sure no overlaps.
+    // AstVar::userp		-> Used by ConstVarMarkVisitor/ConstVarFindVisitor
+
     // STATE
     bool	m_params;	// If true, propogate parameterized and true numbers only
     bool	m_required;	// If true, must become a constant
@@ -494,10 +546,26 @@ private:
 	    }
 	}
 	else if (!m_cpp && nodep->lhsp()->castConcat()) {
-	    UINFO(4,"  ASSI "<<nodep<<endl);
+	    bool need_temp = false;
+	    if (m_warn && !nodep->castAssignDly()) {  // Is same var on LHS and RHS?
+		ConstVarMarkVisitor mark(nodep->lhsp());
+		ConstVarFindVisitor find(nodep->rhsp());
+		if (find.found()) need_temp = true;
+	    }
+	    if (need_temp) {
+		// The first time we constify, there may be the same variable on the LHS
+		// and RHS.  In that case, we must use temporaries, or {a,b}={b,a} will break.
+		UINFO(4,"  ASSITEMP "<<nodep<<endl);
+		// ASSIGN(CONCAT(lc1,lc2),rhs) -> ASSIGN(temp1,SEL(rhs,{size})),
+		//				  ASSIGN(temp2,SEL(newrhs,{size}))
+		//                                ASSIGN(lc1,temp1),
+		//				  ASSIGN(lc2,temp2)
+	    } else {
+		UINFO(4,"  ASSI "<<nodep<<endl);
+		// ASSIGN(CONCAT(lc1,lc2),rhs) -> ASSIGN(lc1,SEL(rhs,{size})),
+		//				  ASSIGN(lc2,SEL(newrhs,{size}))
+	    }
 	    if (debug()>=9) nodep->dumpTree(cout,"  Ass_old: ");
-	    // ASSIGN(CONCAT(lc1,lc2),rhs) -> ASSIGN(lc1,SEL(rhs,{size})),
-	    //				      ASSIGN(lc2,SEL(newrhs,{size}))
 	    // Unlink the stuff
 	    AstNode*   lc1p    = nodep->lhsp()->castConcat()->lhsp()->unlinkFrBack();
 	    AstNode*   lc2p    = nodep->lhsp()->castConcat()->rhsp()->unlinkFrBack();
@@ -517,14 +585,50 @@ private:
 	    sel2p->width(msb2-lsb2+1,msb2-lsb2+1);
 	    // Make new assigns of same flavor as old one
 	    //*** Not cloneTree; just one node.
-	    AstNodeAssign* asn1p=nodep->cloneType(lc1p, sel1p)->castNodeAssign();
-	    AstNodeAssign* asn2p=nodep->cloneType(lc2p, sel2p)->castNodeAssign();
-	    asn1p->width(msb1-lsb1+1,msb1-lsb1+1);
-	    asn2p->width(msb2-lsb2+1,msb2-lsb2+1);
-	    nodep->addNextHere(asn1p);
-	    nodep->addNextHere(asn2p);
-	    if (debug()>=9) asn1p->dumpTree(cout,"     _new: ");
-	    if (debug()>=9) asn2p->dumpTree(cout,"     _new: ");
+	    AstNode* newp = NULL;
+	    if (!need_temp) {
+		AstNodeAssign* asn1ap=nodep->cloneType(lc1p, sel1p)->castNodeAssign();
+		AstNodeAssign* asn2ap=nodep->cloneType(lc2p, sel2p)->castNodeAssign();
+		asn1ap->width(msb1-lsb1+1,msb1-lsb1+1);
+		asn2ap->width(msb2-lsb2+1,msb2-lsb2+1);
+		newp = newp->addNext(asn1ap);
+		newp = newp->addNext(asn2ap);
+	    } else {
+		if (!m_modp) nodep->v3fatalSrc("Not under module");
+		// We could create just one temp variable, but we'll get better optimization
+		// if we make one per term.
+		string name1 = ((string)"__Vconcswap__"+cvtToStr(m_modp->varNumGetInc()));
+		string name2 = ((string)"__Vconcswap__"+cvtToStr(m_modp->varNumGetInc()));
+		AstVar* temp1p = new AstVar(sel1p->fileline(), AstVarType::BLOCKTEMP, name1,
+					    new AstRange(sel1p->fileline(), msb1-lsb1, 0));
+		AstVar* temp2p = new AstVar(sel2p->fileline(), AstVarType::BLOCKTEMP, name2,
+					    new AstRange(sel2p->fileline(), msb2-lsb2, 0));
+		m_modp->addStmtp(temp1p);
+		m_modp->addStmtp(temp2p);
+		AstNodeAssign* asn1ap=nodep->cloneType
+		    (new AstVarRef(sel1p->fileline(), temp1p, true),
+		     sel1p)->castNodeAssign();
+		AstNodeAssign* asn2ap=nodep->cloneType
+		    (new AstVarRef(sel2p->fileline(), temp2p, true),
+		     sel2p)->castNodeAssign();
+		AstNodeAssign* asn1bp=nodep->cloneType
+		    (lc1p, new AstVarRef(sel1p->fileline(), temp1p, false))
+		    ->castNodeAssign();
+		AstNodeAssign* asn2bp=nodep->cloneType
+		    (lc2p, new AstVarRef(sel2p->fileline(), temp2p, false))
+		    ->castNodeAssign();
+		asn1ap->width(msb1-lsb1+1,msb1-lsb1+1);
+		asn1bp->width(msb1-lsb1+1,msb1-lsb1+1);
+		asn2ap->width(msb2-lsb2+1,msb2-lsb2+1);
+		asn2bp->width(msb2-lsb2+1,msb2-lsb2+1);
+		// This order matters
+		newp = newp->addNext(asn1ap);
+		newp = newp->addNext(asn2ap);
+		newp = newp->addNext(asn1bp);
+		newp = newp->addNext(asn2bp);
+	    }
+	    if (debug()>=9) newp->dumpTreeAndNext(cout,"     _new: ");
+	    nodep->addNextHere(newp);
 	    // Cleanup
 	    nodep->unlinkFrBack()->deleteTree(); nodep=NULL;
 	    conp->deleteTree(); conp=NULL;

src/V3File.cpp

@@ -23,6 +23,7 @@
 #include "verilatedos.h"
 #include <stdarg.h>
 #include <sys/stat.h>
+#include <sys/types.h>
 #include <unistd.h>
 #include <iomanip>
 #include <memory>
@@ -232,6 +233,14 @@ bool V3File::checkTimes(const string& filename, const string& cmdline) {
     return dependImp.checkTimes(filename, cmdline);
 }
 
+void V3File::createMakeDir() {
+    static bool created = false;
+    if (!created) {
+	created = true;
+	mkdir(v3Global.opt.makeDir().c_str(), 0777);
+    }
+}
+
 //######################################################################
 // V3OutFile: A class for printing to a file, with automatic indentation of C++ code.
 

src/V3File.h

@@ -46,6 +46,7 @@ public:
 	return new_ofstream_nodepend (filename, append);
     }
     static ofstream* new_ofstream_nodepend(const string& filename, bool append=false) {
+	if (filename != "/dev/null") createMakeDir();
 	if (append) {
 	    return new ofstream(filename.c_str(), ios::app);
 	} else {
@@ -53,15 +54,20 @@ public:
 	}
     }
     static FILE* new_fopen_w(const string& filename) {
+	if (filename != "/dev/null") createMakeDir();
 	addTgtDepend(filename);
 	return fopen(filename.c_str(),"w");
     }
+
     // Dependencies
     static void addSrcDepend(const string& filename);
     static void addTgtDepend(const string& filename);
     static void writeDepend(const string& filename);
     static void writeTimes(const string& filename, const string& cmdline);
     static bool checkTimes(const string& filename, const string& cmdline);
+
+    // Directory utilities
+    static void createMakeDir();
 };
 
 //============================================================================

src/V3Options.cpp

@@ -24,6 +24,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <dirent.h>
+#include <unistd.h>
 #include <set>
 #include <list>
 #include <map>
@@ -226,6 +227,55 @@ string V3Options::filePath (FileLine* fl, const string& modname, const string& e
     return "";
 }
 
+void V3Options::unlinkRegexp(const string& dir, const string& regexp) {
+    if (DIR* dirp = opendir(dir.c_str())) {
+	while (struct dirent* direntp = readdir(dirp)) {
+	    if (wildmatch(direntp->d_name, regexp.c_str())) {
+		string fullname = dir + "/" + string(direntp->d_name);
+		unlink (fullname.c_str());
+	    }
+	}
+	closedir(dirp);
+    }
+}
+ 
+// Double procedures, inlined, unrolls loop much better
+inline bool V3Options::wildmatchi(const char* s, const char* p) {
+    for ( ; *p; s++, p++) {
+	if (*p!='*') {
+	    if (((*s)!=(*p)) && *p != '?')
+		return false;
+	}
+	else {
+	    // Trailing star matches everything.
+	    if (!*++p) return true;
+	    while (wildmatch(s, p) == false)
+		if (*++s == '\0')
+		    return false;
+	    return true;
+	}
+    }
+    return(*s == '\0' || *s == '[');
+}
+
+bool V3Options::wildmatch(const char* s, const char* p) {
+    for ( ; *p; s++, p++) {
+	if (*p!='*') {
+	    if (((*s)!=(*p)) && *p != '?')
+		return false;
+	}
+	else {
+	    // Trailing star matches everything.
+	    if (!*++p) return true;
+	    while (wildmatchi(s, p) == false)
+		if (*++s == '\0')
+		    return false;
+	    return true;
+	}
+    }
+    return(*s == '\0' || *s == '[');
+}
+
 //######################################################################
 // V3 Options accessors
 

src/V3Options.h

@@ -115,6 +115,7 @@ class V3Options {
     void optimize(int level);
     void coverage(bool flag) { m_coverageLine = m_coverageUser = flag; }
     bool onoff(const char* sw, const char* arg, bool& flag);
+    static bool wildmatchi(const char* s, const char* p);
 
   public:
     // CREATORS
@@ -203,12 +204,16 @@ class V3Options {
     void parseOptsList (FileLine* fl, int argc, char** argv);
     void parseOptsFile (FileLine* fl, const string& filename);
 
+    // METHODS (generic string utilities)
+    static bool wildmatch(const char* s, const char* p);
+
     // METHODS (generic file utilities)
     static string filenameFromDirBase (const string& dir, const string& basename);
     static string filenameNonDir (const string& filename);	///< Return non-directory part of filename
     static string filenameNonExt (const string& filename);	///< Return non-extensioned (no .) part of filename
     static string filenameNonDirExt (const string& filename) { return filenameNonExt(filenameNonDir(filename)); }	///< Return basename of filename
     static string filenameDir (const string& filename);	///< Return directory part of filename
+    static void   unlinkRegexp(const string& dir, const string& regexp);
     static string getenvStr(const char* envvar, const char* defaultValue) {
 	if (const char* envvalue = getenv(envvar)) {
 	    return envvalue;

src/V3PreShell.cpp

@@ -33,6 +33,7 @@
 #include "V3PreShell.h"
 #include "V3PreProc.h"
 #include "V3File.h"
+#include "V3Read.h"
 
 //######################################################################
 
@@ -64,38 +65,15 @@ protected:
 	}
     }
 
-    void preproc (FileLine* fl, const string& modname, const string& vppFilename) {
+    void preproc (FileLine* fl, const string& modname, V3Read* readerp) {
 	// Preprocess the given module, putting output in vppFilename
-	unlink(vppFilename.c_str());
 	UINFONL(1,"  Preprocessing "<<modname<<endl);
 
-	// Open
-	ofstream* ofp = NULL;
-	ostream* osp;
-	if (v3Global.opt.preprocOnly()) {
-	    osp = &cout;
-	} else if (!v3Global.opt.keepTempFiles()) {  // Must match unlink rule in V3Read.cpp
-	    osp = ofp = V3File::new_ofstream_nodepend(vppFilename);
-	} else {
-	    osp = ofp = V3File::new_ofstream(vppFilename);
-	}
-	if (osp->fail()) {
-	    fl->v3error("Cannot write preprocessor output: "+vppFilename);
-	    return;
-	}
-
 	// Preprocess
 	preprocOpen(fl, modname, "Cannot find file containing module: ");
 	while (!s_preprocp->isEof()) {
 	    string line = s_preprocp->getline();
-	    *osp << line;
-	}
-
-	// Close
-	if (ofp) {
-	    ofp->close();
-	    delete ofp;
-	    osp = ofp = NULL;
+	    readerp->ppPushText(line);
 	}
     }
 
@@ -129,8 +107,8 @@ V3PreProc* V3PreShellImp::s_preprocp = NULL;
 void V3PreShell::boot(char** env) {
     V3PreShellImp::s_preImp.boot(env);
 }
-void V3PreShell::preproc(FileLine* fl, const string& modname, const string& vppFilename) {
-    V3PreShellImp::s_preImp.preproc(fl, modname, vppFilename);
+void V3PreShell::preproc(FileLine* fl, const string& modname, V3Read* readerp) {
+    V3PreShellImp::s_preImp.preproc(fl, modname, readerp);
 }
 void V3PreShell::preprocInclude(FileLine* fl, const string& modname) {
     V3PreShellImp::s_preImp.preprocInclude(fl, modname);

src/V3PreShell.h

@@ -26,13 +26,15 @@
 #include "verilatedos.h"
 #include "V3Error.h"
 
+class V3Read;
+
 //============================================================================
 
 class V3PreShell {
     // Static class for calling preprocessor
 public:
     static void boot(char** env);
-    static void preproc(FileLine* fileline, const string& module, const string& vppFilename);
+    static void preproc(FileLine* fileline, const string& module, V3Read* readerp);
     static void preprocInclude(FileLine* fileline, const string& module);
     static string dependFiles() { return ""; }   // Perl only
     static void define(const string& name, const string& value);

src/V3Read.cpp

@@ -57,7 +57,7 @@ extern int yydebug;
 class V3Lexer : public V3LexerBase {
 public:
     // CONSTRUCTORS
-    V3Lexer(std::istream* arg_yyin) : V3LexerBase(arg_yyin) {}
+    V3Lexer() : V3LexerBase(NULL) {}
     ~V3Lexer() {}
     // METHODS
     void stateExitPsl() {
@@ -91,6 +91,29 @@ V3Read::~V3Read() {
     parserClear();
 }
 
+int V3Read::ppInputToLex(char* buf, int max_size) {
+    int got = 0;
+    while (got < max_size	// Haven't got enough
+	   && !m_ppBuffers.empty()) {	// And something buffered
+	string front = m_ppBuffers.front(); m_ppBuffers.pop_front();
+	int len = front.length();
+	if (len > (max_size-got)) {  // Front string too big
+	    string remainder = front.substr(max_size-got);
+	    front = front.substr(0, max_size-got);
+	    m_ppBuffers.push_front(remainder);  // Put back remainder for next time
+	    len = (max_size-got);
+	}
+	strncpy(buf+got, front.c_str(), len);
+	got += len;
+    }
+    if (debug()>=9) {
+	string out = string(buf,got);
+	cout<<"   inputToLex  got="<<got<<" '"<<out<<"'"<<endl;
+    }
+    // Note returns 0 at EOF
+    return got;
+}
+
 void V3Read::readFile(FileLine* fileline, const string& modfilename, bool inLibrary) {
     string modname = V3Options::filenameNonExt(modfilename);
 
@@ -98,42 +121,52 @@ void V3Read::readFile(FileLine* fileline, const string& modfilename, bool inLibr
     m_fileline = new FileLine(fileline);
     m_inLibrary = inLibrary;
 
-    // Read it
-    string vppfilename = v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"_"+modname+".vpp";
-    V3PreShell::preproc(fileline, modfilename, vppfilename);
+    // Preprocess into m_ppBuffer
+    V3PreShell::preproc(fileline, modfilename, this);
 
-    if (!v3Global.opt.preprocOnly()) {
-	lexFile (vppfilename, modfilename);
+    if (v3Global.opt.preprocOnly() || v3Global.opt.keepTempFiles()) {
+	// Create output file with all the preprocessor output we buffered up
+	string vppfilename = v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"_"+modname+".vpp";
+	ofstream* ofp = NULL;
+	ostream* osp;
+	if (v3Global.opt.preprocOnly()) {
+	    osp = &cout;
+	} else {
+	    osp = ofp = V3File::new_ofstream(vppfilename);
+	}
+	if (osp->fail()) {
+	    fileline->v3error("Cannot write preprocessor output: "+vppfilename);
+	    return;
+	} else {
+	    for (deque<string>::iterator it = m_ppBuffers.begin(); it!=m_ppBuffers.end(); ++it) {
+		*osp << *it;
+	    }
+	    if (ofp) {
+		ofp->close();
+		delete ofp; ofp = NULL;
+	    }
+	}
     }
 
-    if (!v3Global.opt.keepTempFiles()) {  // Must match new_ofstream_nodepend rule in V3PreShell.cpp
-	unlink (vppfilename.c_str());
+    // Parse it
+    if (!v3Global.opt.preprocOnly()) {
+	lexFile (modfilename);
     }
 }
 
-void V3Read::lexFile(const string& vppfilename, const string& modname) {
-    // Open the preprocess output
-    // Don't track a input dependency, as we created the file ourselves
-    ifstream* fsp = V3File::new_ifstream_nodepend(vppfilename);
-    if (fsp->fail()) {
-	m_fileline->v3fatal("Module "<<modname<<" isn't found, or preprocessor errors in "<<vppfilename);
-    }
-
+void V3Read::lexFile(const string& modname) {
     // Prepare for lexing
-    UINFO(3,"Lexing "<<vppfilename<<endl);
+    UINFO(3,"Lexing "<<modname<<endl);
     V3Read::s_readp = this;
     V3Read::fileline()->warnResetDefault();	// Reenable warnings on each file
     if (m_lexerp) delete m_lexerp;	// Restart from clean slate.
-    m_lexerp = new V3Lexer(fsp);
+    m_lexerp = new V3Lexer();
     // if (debug()) { m_lexerp->set_debug(~0);  }
     // if (debug()) yydebug = 1;
-    UINFO(4,"Lexing Done "<<vppfilename<<endl);
+    UINFO(4,"Lexing Done "<<modname<<endl);
 
     // Lex it
     if (yyparse()) v3fatal("Cannot continue\n");
-
-    // Cleanup
-    fsp->close(); delete fsp; fsp = NULL;
 }
 
 //======================================================================

src/V3Read.h

@@ -45,6 +45,7 @@ class V3Read {
     deque<string*> m_stringps;		// Created strings for later cleanup
     deque<V3Number*> m_numberps;	// Created numbers for later cleanup
     deque<FileLine>  m_lintState;	// Current lint state for save/restore
+    deque<string> m_ppBuffers;		// Preprocessor->lex buffer of characters to process
     //int debug() { return 9; }
 
 protected:
@@ -52,6 +53,7 @@ protected:
     friend class V3Lexer;
     friend class V3LexerBase;
     friend class FileLine;
+    friend class V3PreShellImp;
     int yylexThis();
     static bool optPsl();
     static void ppline (const char* text);
@@ -64,6 +66,9 @@ protected:
     static bool popBeginKeywords() { if (s_readp->m_inBeginKwd) { s_readp->m_inBeginKwd--; return true; } else return false; }
     static int lastVerilogState() { return s_readp->m_lastVerilogState; }
 
+    void ppPushText(const string& text) { m_ppBuffers.push_back(text); }
+    int ppInputToLex(char* buf, int max_size);
+
 public: // But for internal use only
     static string* newString(const string& text) {
 	// Allocate a string, remembering it so we can reclaim storage at lex end
@@ -100,6 +105,7 @@ public: // But for internal use only
     static void statePushVlg();	// Parser -> lexer communication
     static void statePop();	// Parser -> lexer communication
     static int stateVerilogRecent();	// Parser -> lexer communication
+    static int flexPpInputToLex(char* buf, int max_size) { return s_readp->ppInputToLex(buf,max_size); }
 
 public:
     // CREATORS
@@ -118,7 +124,7 @@ public:
     void readFile(FileLine* fileline, const string& modname, bool inLibrary);
 
 private:
-    void lexFile(const string& vppfilename, const string& modname);
+    void lexFile(const string& modname);
 };
 
 #endif // Guard

src/Verilator.cpp

@@ -464,6 +464,7 @@ void process () {
 	V3EmitC::emitcSyms();
 	V3EmitC::emitcTrace();
     }
+    // Unfortunately we have some lint checks in emitc.
     V3EmitC::emitc();
 
     // Statistics
@@ -521,13 +522,9 @@ int main(int argc, char** argv, char** env) {
     //--FRONTEND------------------
 
     // Cleanup
-    mkdir(v3Global.opt.makeDir().c_str(), 0777);
-    string cleanFilename = "/bin/rm -rf "+v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"_*.tree";
-    system(cleanFilename.c_str());
-    cleanFilename = "/bin/rm -rf "+v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"_*.dot";
-    system(cleanFilename.c_str());
-    cleanFilename = "/bin/rm -rf "+v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"_*.txt";
-    system(cleanFilename.c_str());
+    V3Options::unlinkRegexp(v3Global.opt.makeDir(), v3Global.opt.prefix()+"_*.tree");
+    V3Options::unlinkRegexp(v3Global.opt.makeDir(), v3Global.opt.prefix()+"_*.dot");
+    V3Options::unlinkRegexp(v3Global.opt.makeDir(), v3Global.opt.prefix()+"_*.txt");
 
     // Read first filename
     v3Global.readFiles();

src/config_build.h.in

@@ -24,7 +24,7 @@
 //**********************************************************************
 //**** Version and host name
 
-#define DTVERSION	"Verilator 3.656 2008/01/18"
+#define DTVERSION	"Verilator 3.658 2008/01/18"
 
 //**********************************************************************
 //**** Functions

src/verilog.l

@@ -33,6 +33,9 @@ extern void yyerrorf(const char* format, ...);
 
 #define STATE_VERILOG_RECENT  S05		// State name for most recent Verilog Version
 
+#define YY_INPUT(buf,result,max_size) \
+    result = V3Read::flexPpInputToLex(buf,max_size);
+
 //======================================================================
 
 #define NEXTLINE() {V3Read::incLineno();}
@@ -698,7 +701,7 @@ escid	\\[^ \t\f\r\n]+
   /************************************************************************/
   /* Attributes */
 <V95,V01,V05,S05>{
-    "(*" 		{ yymore(); yy_push_state(ATTRMODE); }
+    "(*"/{ws}*[^)]	{ yymore(); yy_push_state(ATTRMODE); }	// Doesn't match (*)
 }
 
   /************************************************************************/

src/verilog.y

@@ -526,15 +526,15 @@ regsigList:	regsig  				{ $$ = $1; }
 	|	regsigList ',' regsig		       	{ $$ = $1;$1->addNext($3); }
 	;
 
-portV2kDecl:	varRESET varInput  signingE v2kNetDeclE regrangeE portV2kSig	{ $$ = $6; }
-	|	varRESET varInout  signingE v2kNetDeclE regrangeE portV2kSig	{ $$ = $6; }
-	|	varRESET varOutput signingE v2kVarDeclE regrangeE portV2kSig	{ $$ = $6; }
+portV2kDecl:	varRESET varInput  v2kNetDeclE signingE regrangeE portV2kSig	{ $$ = $6; }
+	|	varRESET varInout  v2kNetDeclE signingE regrangeE portV2kSig	{ $$ = $6; }
+	|	varRESET varOutput v2kVarDeclE signingE regrangeE portV2kSig	{ $$ = $6; }
 	;
 
 // IEEE: port_declaration - plus ';'
-portDecl:	varRESET varInput  signingE v2kVarDeclE regrangeE  sigList ';'	{ $$ = $6; }
-     	|	varRESET varInout  signingE v2kVarDeclE regrangeE  sigList ';'	{ $$ = $6; }
-     	|	varRESET varOutput signingE v2kVarDeclE regrangeE  sigList ';'	{ $$ = $6; }
+portDecl:	varRESET varInput  v2kVarDeclE signingE regrangeE  sigList ';'	{ $$ = $6; }
+     	|	varRESET varInout  v2kVarDeclE signingE regrangeE  sigList ';'	{ $$ = $6; }
+     	|	varRESET varOutput v2kVarDeclE signingE regrangeE  sigList ';'	{ $$ = $6; }
 	;
 
 varDecl:	varRESET varReg     signingE regrangeE  regsigList ';'	{ $$ = $5; }
@@ -838,7 +838,7 @@ eventControlE:	/* empty */				{ $$ = NULL; }
 // IEEE: event_control
 eventControl:	'@' '(' senList ')'			{ $$ = new AstSenTree($1,$3); }
 	|	'@' senitemVar				{ $$ = new AstSenTree($1,$2); }	/* For events only */
-	|	'@' '(' '*' ')'				{ $$ = NULL; $2->v3error("Use @*.  always @ (*) to be depreciated in Verilog 2005.\n"); }
+	|	'@' '(' '*' ')'				{ $$ = NULL; }  /* Verilog 2001 */
 	|	'@' '*'					{ $$ = NULL; }  /* Verilog 2001 */
 	;
 

test_regress/t/t_EXAMPLE.v

@@ -14,7 +14,7 @@
 // please note it here, otherwise:**
 //
 // This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2007 by Wilson Snyder.
+// without warranty, 2008 by Wilson Snyder.
 
 module t (/*AUTOARG*/
    // Inputs

test_regress/t/t_alw_combdly.v

@@ -1,4 +1,4 @@
-// $Id:$
+// $Id$
 // DESCRIPTION: Verilator: Verilog Test module
 //
 // This file ONLY is placed into the Public Domain, for any use,
@@ -14,7 +14,7 @@ module t (/*AUTOARG*/
 
    reg [31:0] a, b, c;
 
-   always @ (/*AS*/a or b) begin
+   always @ (*) begin   // Test Verilog 2001 (*)
       // verilator lint_off COMBDLY
       c <= a | b;
       // verilator lint_on COMBDLY

test_regress/t/t_math_mul.v

@@ -15,21 +15,24 @@ module t (/*AUTOARG*/
    reg [63:0] crc;
    reg [63:0] sum;
 
-   reg [31:0] out1;
-   sub sub (.in1(crc[15:0]), .in2(crc[31:16]), .out1(out1));
+   wire [31:0] out1;
+   wire [31:0] out2;
+   sub sub (.in1(crc[15:0]), .in2(crc[31:16]), .out1(out1), .out2);
 
    always @ (posedge clk) begin
-      //$write("[%0t] cyc==%0d crc=%x sum=%x out=%x\n",$time, cyc, crc, sum, out1);
+`ifdef TEST_VERBOSE
+      $write("[%0t] cyc==%0d crc=%x sum=%x out=%x %x\n",$time, cyc, crc, sum, out1, out2);
+`endif
       cyc <= cyc + 1;
       crc <= {crc[62:0], crc[63]^crc[2]^crc[0]};
-      sum <= {sum[62:0], sum[63]^sum[2]^sum[0]} ^ {32'h0,out1};
+      sum <= {sum[62:0], sum[63]^sum[2]^sum[0]} ^ {out2,out1};
       if (cyc==1) begin
 	 // Setup
 	 crc <= 64'h00000000_00000097;
 	 sum <= 64'h0;
       end
       else if (cyc==90) begin
-	 if (sum !== 64'hc1f743ad62c2c04d) $stop;
+	 if (sum !== 64'he396068aba3898a2) $stop;
       end
       else if (cyc==91) begin
       end
@@ -49,18 +52,20 @@ endmodule
 
 module sub (/*AUTOARG*/
    // Outputs
-   out1,
+   out1, out2,
    // Inputs
    in1, in2
    );
 
    input      [15:0] in1;
    input      [15:0] in2;
-   output reg [31:0] out1;
+   output reg signed [31:0] out1;
+   output reg unsigned [31:0] out2;
    
    always @* begin
       // verilator lint_off WIDTH
       out1 = $signed(in1) * $signed(in2);
+      out2 = $unsigned(in1) * $unsigned(in2);
       // verilator lint_on WIDTH
    end
    

test_regress/t/t_math_swap.pl

@@ -0,0 +1,18 @@
+#!/usr/bin/perl
+if (!$::Driver) { use FindBin; exec("./driver.pl", @ARGV, $0); die; }
+# $Id$
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2003 by Wilson Snyder. This program is free software; you can
+# redistribute it and/or modify it under the terms of either the GNU
+# General Public License or the Perl Artistic License.
+
+compile (
+	 );
+
+execute (
+	 check_finished=>1,
+     );
+
+ok(1);
+1;

test_regress/t/t_math_swap.v

@@ -0,0 +1,165 @@
+// $Id$
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// This file ONLY is placed into the Public Domain, for any use,
+// without warranty, 2008 by Wilson Snyder.
+
+module t (/*AUTOARG*/
+   // Inputs
+   clk
+   );
+   input clk;
+
+   integer 	cyc=0;
+   reg [63:0] 	crc;
+   reg [63:0] 	sum;
+
+   // Take CRC data and apply to testblock inputs
+   wire [31:0]  Operand1 = crc[31:0];
+   wire [15:0]  Operand2 = crc[47:32];
+   wire 	Unsigned = crc[48];
+   reg 		rst;
+
+   parameter wl = 16;
+
+   /*AUTOWIRE*/
+   // Beginning of automatic wires (for undeclared instantiated-module outputs)
+   wire [wl-1:0]	Quotient;		// From test of Test.v
+   wire [wl-1:0]	Remainder;		// From test of Test.v
+   // End of automatics
+
+   Test test (/*AUTOINST*/
+	      // Outputs
+	      .Quotient			(Quotient[wl-1:0]),
+	      .Remainder		(Remainder[wl-1:0]),
+	      // Inputs
+	      .Operand1			(Operand1[wl*2-1:0]),
+	      .Operand2			(Operand2[wl-1:0]),
+	      .clk			(clk),
+	      .rst			(rst),
+	      .Unsigned			(Unsigned));
+
+   // Aggregate outputs into a single result vector
+   wire [63:0] result = {32'h0, Quotient, Remainder};
+
+   // What checksum will we end up with
+`define EXPECTED_SUM 64'h98d41f89a8be5693
+
+   // Test loop
+   always @ (posedge clk) begin
+`ifdef TEST_VERBOSE
+      $write("[%0t] cyc==%0d crc=%x result=%x it=%x\n",$time, cyc, crc, result, test.Iteration);
+`endif
+      cyc <= cyc + 1;
+      if (cyc < 20 || test.Iteration==4'd15) begin
+	 crc <= {crc[62:0], crc[63]^crc[2]^crc[0]};
+      end
+      sum <= result ^ {sum[62:0],sum[63]^sum[2]^sum[0]};
+      if (cyc==0) begin
+	 // Setup
+	 crc <= 64'h5aef0c8d_d70a4497;
+	 rst <= 1'b1;
+      end
+      else if (cyc<20) begin
+	 sum <= 64'h0;
+	 rst <= 1'b0;
+      end
+      else if (cyc<90) begin
+      end
+      else if (cyc==99) begin
+	 $write("[%0t] cyc==%0d crc=%x sum=%x\n",$time, cyc, crc, sum);
+	 if (crc !== 64'h8dd70a44972ad809) $stop;
+	 if (sum !== `EXPECTED_SUM) $stop;
+	 $write("*-* All Finished *-*\n");
+	 $finish;
+      end
+   end
+
+endmodule
+
+module Test(clk, rst, Operand1, Operand2, Unsigned, Quotient, Remainder);
+
+   parameter wl = 16;
+
+   input [wl*2-1:0] Operand1;
+   input [wl-1:0] Operand2;
+   input clk, rst, Unsigned;
+   output [wl-1:0] Quotient, Remainder;
+
+   reg Cy, Overflow, Sign1, Sign2, Zero, Negative;
+   reg [wl-1:0] ah,al,Quotient, Remainder;
+   reg [3:0] 	Iteration;
+   reg [wl-1:0] sub_quot,op;
+   reg 		ah_ext;
+
+   reg [1:0]	a,b,c,d,e;
+
+   always @(posedge clk) begin
+      if (!rst) begin
+	 {a,b,c,d,e} = Operand1[9:0];
+	 {a,b,c,d,e} = {e,d,c,b,a};
+	 if (a != Operand1[1:0]) $stop;
+	 if (b != Operand1[3:2]) $stop;
+	 if (c != Operand1[5:4]) $stop;
+	 if (d != Operand1[7:6]) $stop;
+	 if (e != Operand1[9:8]) $stop;
+      end
+   end
+
+   always @(posedge clk) begin
+      if (rst) begin
+	 Iteration <= 0;
+         Quotient <= 0;
+         Remainder <= 0;
+      end
+      else begin
+	 if (Iteration == 0) begin
+            {ah,al} = Operand1;
+            op = Operand2;
+            Cy = 0;
+            Overflow = 0;
+            Sign1 = (~Unsigned)&ah[wl-1];
+            Sign2 = (~Unsigned)&(ah[wl-1]^op[wl-1]);
+            if (Sign1) {ah,al} = -{ah,al};
+	 end
+`define BUG1
+`ifdef BUG1
+	 {ah_ext,ah,al} = {ah,al,Cy};
+`else
+	 ah_ext = ah[15];
+	 ah[15:1] = ah[14:0];
+	 ah[0] = al[15];
+	 al[15:1] = al[14:0];
+	 al[0] = Cy;
+`endif
+`ifdef TEST_VERBOSE
+	 $display("%x %x %x %x %x %x %x %x %x",
+		  Iteration, ah, al, Quotient, Remainder, Overflow, ah_ext, sub_quot, Cy);
+`endif
+	 {Cy,sub_quot} = (~Unsigned)&op[wl-1]? {ah_ext,ah}+op : {ah_ext,ah} - {1'b1,op};
+	 if (Cy)
+	   begin
+              {ah_ext,ah} = {1'b0,sub_quot};
+	   end
+	 if (Iteration != 15 )
+	   begin
+              if (ah_ext) Overflow = 1;
+	   end
+	 else
+	   begin
+              if (al[14] && ~Unsigned) Overflow = 1;
+              Quotient <= Sign2 ? -{al[14:0],Cy} : {al[14:0],Cy};
+              Remainder <= Sign1 ? -ah : ah;
+              if (Overflow)
+		begin
+	           Quotient <= Sign2 ? 16'h8001 : {Unsigned,{15{1'b1}}};
+	           Remainder <= Unsigned ? 16'hffff : 16'h8000;
+	           Zero = 1;
+	           Negative = 1;
+		end
+	   end
+	 Iteration <= Iteration + 1; // Count number of times this instruction is repeated
+      end
+   end
+
+endmodule

test_regress/t/t_var_in_assign_bad.pl

@@ -8,7 +8,7 @@ if (!$::Driver) { use FindBin; exec("./driver.pl", @ARGV, $0); die; }
 # General Public License or the Perl Artistic License.
 
 compile (
-	 v_flags2 => ["--lint-only"],
+	 v_flags2 => ["--lint-only --Mdir obj_lint_only"],
 	 fails=>1,
 	 expect=>
 '%Error: t/t_var_in_assign_bad.v:\d+: Assigning to input variable: value
@@ -16,5 +16,6 @@ compile (
 %Error: Exiting due to.*',
 	 ) if $Last_Self->{v3};
 
+(!-d "obj_lint_only") or $Last_Self->error("%Error: lint-only shouldn't make output directory");
 ok(1);
 1;