Added a few lines to the setup file parser so that if there is a

missing brace in the file (a common error), then the fact that
there is an unevaluated command when the file has finished being
read will trigger an evaluation of the unfinished code and emit
an error.  Previously, the command and anything after the
unterminated brace would just silently get ignored, which was not
helpful for debugging setup syntax errors.

VERSION

@@ -1 +1 @@
-1.5.310
+1.5.313

base/netcmp.c

@@ -7544,6 +7544,11 @@ struct nlist *addproxies(struct hashlist *p, void *clientdata)
 	     }
 	     else {
 		lob = ob;
+		if (ob == NULL) {
+		    Fprintf(stdout, "Error:  Premature end of pin list on "
+			"instance %s.\n", firstpin->instance.name);
+		    break;
+		}
 		ob->type = i++;
 		ob = ob->next;
 	     }

base/verilog.c

@@ -76,7 +76,8 @@ struct hashdict verilogparams;
 // Global storage for verilog definitions
 struct hashdict verilogdefs;
 // Record file pointer that is associated with the hash tables
-int hashfile = -1;
+int hashfilep = -1;	/* for parameters */
+int hashfiled = -1;	/* for definitions */
 
 // Global storage for wire buses
 struct hashdict buses;
@@ -156,7 +157,8 @@ struct expr_stack {
 //-------------------------------------------------------------------------
 // Evaluate an expression for an array bound.  This is much like
 // ReduceOneExpression() in netgen.c, but only handles basic integer
-// arithmetic (+,-,*,/) and grouping by parentheses.
+// arithmetic (+,-,*,/), grouping by parentheses, bit shifts, and
+// if-else operators.
 //
 // Returns 1 if successful, 0 on error.
 // Evaluated result is placed in the integer pointed to by "valptr".
@@ -220,6 +222,39 @@ int EvalExpr(struct expr_stack **stackptr, int *valptr)
 	    }
 	}
 
+	/* Reduce (a << b) and (a >> b) */
+
+	for (texp = start; texp; texp = texp->next) {
+	    if ((texp->last != NULL) && (texp->next != NULL) && (texp->oper != '\0')) {
+		if ((texp->last->oper == '\0') && (texp->next->oper == '\0')) {
+		    if (texp->oper == '<') {
+			/* Left shift */
+			texp->last->value <<= texp->next->value;
+			/* Remove two items from the stack */
+			tmp = texp;
+			texp = texp->last;
+			texp->next = tmp->next->next;
+			if (tmp->next->next) tmp->next->next->last = texp;
+			FREE(tmp->next);
+			FREE(tmp);
+			modified = TRUE;
+		    }
+		    if (texp->oper == '>') {
+			/* Right shift */
+			texp->last->value >>= texp->next->value;
+			/* Remove two items from the stack */
+			tmp = texp;
+			texp = texp->last;
+			texp->next = tmp->next->next;
+			if (tmp->next->next) tmp->next->next->last = texp;
+			FREE(tmp->next);
+			FREE(tmp);
+			modified = TRUE;
+		    }
+		} 
+	    }
+	}
+
 	/* Reduce (a * b) and (a / b) */
 
 	for (texp = start; texp; texp = texp->next) {
@@ -295,6 +330,39 @@ int EvalExpr(struct expr_stack **stackptr, int *valptr)
 	    }
 	}
 
+	/* Reduce (a ? b : c) */
+
+	for (texp = start; texp; texp = texp->next) {
+	    /* There must be at least five objects on the stack */
+	    if ((texp->last != NULL) && (texp->next != NULL) && (texp->oper != '\0')
+			&& (texp->next->next != NULL)
+			&& (texp->next->next->next != NULL)) {
+		if ((texp->last->oper == '\0') && (texp->next->oper == '\0')
+			&& (texp->next->next->next->oper == '\0')) {
+		    if ((texp->oper == '?') && (texp->next->next->oper == ':')) {
+			/* If-Else conditional */
+			if (texp->last->value)
+			    texp->last->value = texp->next->value;
+			else
+			    texp->last->value = texp->next->next->next->value;
+
+			/* Remove four items from the stack */
+			tmp = texp;
+			texp = texp->last;
+			texp->next = tmp->next->next->next->next;
+			if (tmp->next->next->next->next)
+			    tmp->next->next->next->next->last = texp;
+			FREE(tmp->next->next->next);
+			FREE(tmp->next->next);
+			FREE(tmp->next);
+			FREE(tmp);
+
+			modified = TRUE;
+		    }
+		} 
+	    }
+	}
+
 	/* Reduce (a) */
 
 	for (texp = start; texp; texp = texp->next) {
@@ -373,8 +441,15 @@ int ParseIntegerExpression(char *expr, int *iptr)
 
 	if (match(sptr, "+") || match(sptr, "-")
 	    	|| match(sptr, "*") || match(sptr, "/")
-	    	|| match(sptr, "(") || match(sptr, ")")) {
+	    	|| match(sptr, "(") || match(sptr, ")")
+	    	|| match(sptr, "<<") || match(sptr, ">>")
+	    	|| match(sptr, "?") || match(sptr, ":")) {
 	    newexp = (struct expr_stack *)MALLOC(sizeof(struct expr_stack));
+	    /* Note that "oper" is one character and that "<<" and ">>"
+	     * become '<' and '>', respectively.  The less-than and greater-
+	     * than operators are not (yet) handled but will need to be
+	     * recast to some other character in "oper".
+	     */
 	    newexp->oper = *sptr;
 	    newexp->value = 0;
 	    newexp->next = NULL;
@@ -389,7 +464,7 @@ int ParseIntegerExpression(char *expr, int *iptr)
 	if ((result = sscanf(sptr, "%d", &value)) != 1) {
 
 	    // Is name in the parameter list?
-	    kl = (struct property *)HashLookup(nexttok, &verilogparams);
+	    kl = (struct property *)HashLookup(sptr, &verilogparams);
 	    if (kl == NULL) {
 		Printf("Value %s in expression is not a number or a parameter.\n",
 				sptr);
@@ -402,27 +477,29 @@ int ParseIntegerExpression(char *expr, int *iptr)
 		    if (result != 1) {
 		        Printf("Parameter %s has value %s that cannot be parsed"
 				" as an integer.\n",
-				nexttok, kl->pdefault.string);
+				sptr, kl->pdefault.string);
 		    	value = 0;
 			break;
 		    }
 		}
 		else if (kl->type == PROP_INTEGER) {
 		    value = kl->pdefault.ival;
+		    result = 1;		// Assert valid result
 		}
 		else if (kl->type == PROP_DOUBLE) {
 		    value = (int)kl->pdefault.dval;
 		    if ((double)value != kl->pdefault.dval) {
 		        Printf("Parameter %s has value %g that cannot be parsed"
 				" as an integer.\n",
-				nexttok, kl->pdefault.dval);
+				sptr, kl->pdefault.dval);
 		    	value = 0;
 			break;
 		    }
+		    result = 1;		// Assert valid result
 		}
 		else {
 		    Printf("Parameter %s has unknown type; don't know how"
-				" to parse.\n", nexttok);
+				" to parse.\n", sptr);
 		    value = 0;
 		    break;
 		}
@@ -516,7 +593,8 @@ int GetBusTok(struct bus *wb)
 	    }
 	    else if (match(nexttok, "+") || match(nexttok, "-")
 	    		|| match(nexttok, "*") || match(nexttok, "/")
-	    		|| match(nexttok, "(") || match(nexttok, ")")) {
+	    		|| match(nexttok, "(") || match(nexttok, ")")
+	    		|| match(nexttok, "<<") || match(nexttok, ">>")) {
 		newexp = (struct expr_stack *)MALLOC(sizeof(struct expr_stack));
 		newexp->oper = *nexttok;
 		newexp->value = 0;
@@ -1879,7 +1957,8 @@ skip_endmodule:
 	// Allowed uses of "assign" for netlists:
 	//    "assign a = b" joins two nets.
 	//    "assign a = {b, c, ...}" creates a bus from components.
-	//    "assign" using any boolean arithmetic is not structural verilog.
+	//    "assign" using if-else constructs or bit shifts.
+	//   ("assign" using any other boolean arithmetic is not structural verilog.)
 	//    "assign a = {x{b}}" creates a bus by repeating a component.
 
 	if (nexttok && match(nexttok, "=")) {
@@ -2140,6 +2219,19 @@ nextinst:
 	 }
 	 SkipTokComments(VLOG_DELIMITERS);
       }
+      else if (loop.loopvar != NULL) {
+	 /* Instances created within a generate block for loop have an
+	  * implicit array
+	  */
+	 int loopval;
+	 struct property *klr;
+
+	 klr = (struct property *)HashLookup(loop.loopvar, &verilogparams);
+	 loopval = klr->pdefault.ival;
+
+         arraystart = arrayend = loopval;
+         sprintf(instancename + strlen(instancename), "[%d]", loopval);
+      }
 
       if (match(nexttok, "(")) {
 	 char savetok = (char)0;
@@ -2202,7 +2294,8 @@ nextinst:
 			 strcat(new_wire_bundle, nexttok);
 			 FREE(wire_bundle);
 			 wire_bundle = new_wire_bundle;
-			 if (!strcmp(nexttok, "}")) break;
+			 if (!strcmp(nexttok, "}"))
+			    break;
 			 SkipTokComments(VLOG_PIN_CHECK_DELIMITERS);
 		     }
 		     if (!nexttok) {
@@ -2578,6 +2671,7 @@ nextinst:
 	 char *brackptr;
 	 int j;
 	 char locinst[MAX_STR_LEN];
+	 int arraypos = (arraystart > arrayend) ? arraymax - i : i;
 
          if (i != -1)
 	    sprintf(locinst, "%s[%d]", instancename, i);
@@ -2627,7 +2721,14 @@ nextinst:
 	       else if (GetBus(scan->net, &wb) == 0) {
 		   char *bptr2;
 		   char *scanroot;
-		   scanroot = strsave(scan->net);
+		   int isbundle = FALSE;
+		   /* Skip over a bundle delimiter */
+		   if (*scan->net == '{') {
+		      scanroot = strsave(scan->net + 1);
+		      isbundle = TRUE;
+		   }
+		   else
+		      scanroot = strsave(scan->net);
 		   brackptr = strvchr(scanroot, '[');
 		   if (brackptr) *brackptr = '\0';
 
@@ -2660,6 +2761,7 @@ nextinst:
 		   else {
 		       // Instance must be an array
 		       char netname[MAX_STR_LEN];
+		       char *spos = scanroot;
 		       int slice, portlen, siglen;
 
 		       /* Get the array size of the port for bit slicing */
@@ -2671,27 +2773,49 @@ nextinst:
 		       if (siglen < 0) siglen = -siglen;
 		       siglen++;
 
-		       // If signal array is smaller than the portlength *
-		       // length of instance array, then the signal wraps.
+		       // If this is a bundle, then count out to the current
+		       // slice and read off the index.  NOTE:  Need to
+		       // handle multiple bits per bundle entry!
+		       if (isbundle) {
+			   int j;
+			   if (brackptr) *brackptr = '[';
+			   for (j = 0; j < arraypos * portlen; j++) {
+			       spos = strvchr(spos, ',');
+			       if (spos == NULL) break;
+			       spos++;
+			   }
+			   if (spos != NULL) {
+			       brackptr = strvchr(spos, '[');
+			       *brackptr = '\0';
+			       sscanf(brackptr + 1, "%d", &slice);
+			   }
+			   else spos = scanroot;  /* should emit an error here */
+		       }
+		       else {	/* not a bundle */
 
-		       if (wb2.start >= wb2.end && arraystart >= arrayend) {
-			   slice = wb.start - (arraystart - i) * portlen;
-			   while (slice < wb2.end) slice += siglen;
-		       }
-		       else if (wb2.start < wb2.end && arraystart > arrayend) {
-			   slice = wb.start + (arraystart - i) * portlen;
-			   while (slice > wb2.end) slice -= siglen;
-		       }
-		       else if (wb2.start > wb2.end && arraystart < arrayend) {
-			   slice = wb.start - (arraystart + i) * portlen;
-			   while (slice < wb2.end) slice += siglen;
-		       }
-		       else { // (wb2.start < wb2.end && arraystart < arrayend)
-			   slice = wb.start + (arraystart + i) * portlen;
-			   while (slice > wb2.end) slice -= siglen;
+		          // If signal array is smaller than the portlength *
+		          // length of instance array, then the signal wraps.
+
+		          if (wb2.start >= wb2.end && arraystart >= arrayend) {
+			      slice = wb.start - (arraystart - i) * portlen;
+			      while (slice < wb2.end) slice += siglen;
+		          }
+		          else if (wb2.start < wb2.end && arraystart > arrayend) {
+			      slice = wb.start + (arraystart - i) * portlen;
+			      while (slice > wb2.end) slice -= siglen;
+		          }
+		          else if (wb2.start > wb2.end && arraystart < arrayend) {
+			      slice = wb.start - (arraystart + i) * portlen;
+			      while (slice < wb2.end) slice += siglen;
+		          }
+		          else { // (wb2.start < wb2.end && arraystart < arrayend)
+			      slice = wb.start + (arraystart + i) * portlen;
+			      while (slice > wb2.end) slice -= siglen;
+		          }
+			  spos = scanroot;
 		       }
 
-		       sprintf(netname, "%s[%d]", scanroot, slice);
+		       sprintf(netname, "%s[%d]", spos, slice);
 	               if (LookupObject(netname, CurrentCell) == NULL) Node(netname);
 	               join(netname, obptr->name);
 		   }
@@ -2876,18 +3000,25 @@ char *ReadVerilogTop(char *fname, int *fnum, int blackbox)
      hashfunc = hashcase;
   }
 
-  if ((hashfile != -1) && (hashfile != *fnum)) {
-      /* Started a new file, so remove all the parameters and definitions */
+  if ((hashfilep != -1) && (hashfilep != *fnum)) {
+      /* Started a new file, so remove all the parameters */
       RecurseHashTable(&verilogparams, freeprop);
       HashKill(&verilogparams);
+      hashfilep = -1;
+  }
+  if ((hashfiled != -1) && (hashfiled != *fnum)) {
+      /* Started a new file, so remove all the definitions */
       RecurseHashTable(&verilogdefs, freeprop);
       HashKill(&verilogdefs);
-      hashfile = -1;
+      hashfiled = -1;
   }
-  if (hashfile == -1) {
+  if (hashfilep == -1) {
       InitializeHashTable(&verilogparams, OBJHASHSIZE);
+      hashfilep = filenum;
+  }
+  if (hashfiled == -1) {
       InitializeHashTable(&verilogdefs, OBJHASHSIZE);
-      hashfile = *fnum;
+      hashfiled = filenum;
   }
   definitions = &verilogdefs;
 

tcltk/netgen.tcl.in

@@ -516,6 +516,14 @@ proc netgen::lvs { name1 name2 {setupfile setup.tcl} {logfile comp.out} args} {
 	    }
 	 }
 	 close $fsetup
+      	 if {$command != {}} {
+	    # Incomplete command.  Evaluate it to get a meaningful error message
+	    if {[catch {uplevel 1 [list namespace eval netgen $command]} msg]} {
+		set msg [string trimright $msg "\n"]
+		puts stderr "Error $setupfile:$sline (ignoring), $msg"
+		incr perrors
+	    }
+	 }
       } else {
 	 puts stdout "Error:  Cannot read the setup file $setupfile"
       }