update to verilog-current-20010324. Changes since the last version from

the authors announcement are:

There are a few bugs in the main compiler that are fixed. There has
also been an extension to the $fopen that adds support for opening
files for reading. The $fgetc has been added to take advantage of this.
This was done on the VPI side, although a slight extension to the mcd
functions was created.

The real news is the vvp simulation engine. I've added the tgt-vvp
code generator source and the vvp assembler/simulator, and the combination
actually produces the occasional working program. And it makes them
very quickly. So far as I can tell now, I am going to be very pleased
with the final outcome when this work is complete. However, it is not
at all ready to use. This snapshot is mostly to give a preview of things
to come to a wider audience.

HOW VVP WORKS

If you are accustomed to the existing vvm behavior, you remember that
the vvm simulator works by generating C++ and feeding that to the g++
compiler. Many of you are painfully aware of that.

VVP does *not* work like that. Instead of generating C++, the
generator emits assembly language for an abstract simulator processor.
The processor that the assembly targets doesn't really exist, but the
vvp program, included in this Icarus Verilog snapshot, assembles the
code to data structures in memory, then efficiently emulates the abstract
processor.

So the simulation of a program via vvp works by first compiling the
Verilog to vvp assembly. The vvp.tgt modules generates the code, and
is envoked when you use the ``-tvvp'' switch to iverilog.

The vvp assembly file so created is then passed to the vvp program to
be assembled and executed. There is a single vvp input file that is the
design to simulate. The vvp assembler is designed to execute the design
efficiently.

HOW TO LEARN MORE

The ivl_target.h header file describes the loadable target API that
the vvp code generator uses to gain access to the design. Then the
tgt-vvp directory contains the implementation of the vvp code generator.

The vvp directory contains the implementation of the assembler/simulator
that runs the compiled design. The README.txt file describes how the
vvp program works in general, and points to other txt files. There are
a variety of other .txt files in the vvp directory that describe how
the major components of the vvp program work.

6 files changed, 72 insertions, 9 deletions

diff --git a/cad/verilog-current/patches/patch-aa b/cad/verilog-current/patches/patch-aa
index 6d4a5667164..348505d76a5 100644
--- a/cad/verilog-current/patches/patch-aa
+++ b/cad/verilog-current/patches/patch-aa
@@ -1,11 +1,10 @@
-$NetBSD: patch-aa,v 1.5 2000/12/19 18:53:52 dmcmahill Exp $
+$NetBSD: patch-aa,v 1.6 2001/03/31 00:00:35 dmcmahill Exp $
 
---- tgt-pal/Makefile.in.orig	Thu Dec 14 18:37:47 2000
-+++ tgt-pal/Makefile.in	Sun Dec 17 07:52:23 2000
-@@ -63,5 +63,5 @@
+--- vvp/vpi_mcd.cc.orig	Wed Mar 21 21:24:05 2001
++++ vvp/vpi_mcd.cc	Fri Mar 30 09:47:26 2001
+@@ -79,4 +79,5 @@
+ 	return NULL;
+ }
++static unsigned int vpi_mcd_open_x(char *name, char *mode);
  
- pal.tgt: $O $(TGTDEPLIBS)
--	$(CC) @shared@ -o $@ $O $(TGTLDFLAGS) -lipal
-+	$(CC) @shared@ -o $@ $O $(TGTLDFLAGS) $(LDFLAGS) -lipal
- 
- clean:
+ unsigned int vpi_mcd_open(char *name)
diff --git a/cad/verilog-current/patches/patch-ab b/cad/verilog-current/patches/patch-ab
new file mode 100644
index 00000000000..df9735025c1
--- /dev/null
+++ b/cad/verilog-current/patches/patch-ab
@@ -0,0 +1,18 @@
+$NetBSD: patch-ab,v 1.3 2001/03/31 00:00:35 dmcmahill Exp $
+
+--- vvp/functor.cc.orig	Thu Mar 22 00:28:16 2001
++++ vvp/functor.cc	Fri Mar 30 09:47:50 2001
+@@ -185,5 +185,5 @@
+ 	    functor_t idxp = functor_index(idx);
+ 	    vvp_ipoint_t next = idxp->port[ipoint_port(idx)];
+-	    printf("    set %lx to %u\n", idx, oval);
++	    printf("    set %lx to %u\n", (unsigned long) idx, oval);
+ 	    functor_set(idx, oval);
+ 	    idx = next;
+@@ -195,5 +195,5 @@
+       for (unsigned idx = 1 ;  idx < functor_count ;  idx += 1) {
+ 	    functor_t cur = functor_index(idx*4);
+-	    fprintf(fd, "%10p: out=%x port={%x %x %x %x}\n", idx*4,
++	    fprintf(fd, "%10p: out=%x port={%x %x %x %x}\n",(void *) (idx*4),
+ 		    cur->out, cur->port[0], cur->port[1],
+ 		    cur->port[2], cur->port[3]);
diff --git a/cad/verilog-current/patches/patch-ac b/cad/verilog-current/patches/patch-ac
new file mode 100644
index 00000000000..1168ceac530
--- /dev/null
+++ b/cad/verilog-current/patches/patch-ac
@@ -0,0 +1,11 @@
+$NetBSD: patch-ac,v 1.1 2001/03/31 00:00:35 dmcmahill Exp $
+
+--- tgt-vvp/vvp_scope.c.orig	Tue Mar 20 20:49:43 2001
++++ tgt-vvp/vvp_scope.c	Fri Mar 30 09:54:01 2001
+@@ -51,5 +51,5 @@
+       }
+ 
+-      ivl_scope_children(net, draw_scope, net);
++      ivl_scope_children(net, (ivl_scope_f *) draw_scope, net);
+       return 0;
+ }
diff --git a/cad/verilog-current/patches/patch-ae b/cad/verilog-current/patches/patch-ae
new file mode 100644
index 00000000000..d851b23a47a
--- /dev/null
+++ b/cad/verilog-current/patches/patch-ae
@@ -0,0 +1,13 @@
+$NetBSD: patch-ae,v 1.3 2001/03/31 00:00:35 dmcmahill Exp $
+
+--- vvp/Makefile.in.orig	Thu Mar 22 17:37:36 2001
++++ vvp/Makefile.in	Fri Mar 30 11:08:42 2001
+@@ -40,6 +40,6 @@
+ STRIP = @STRIP@
+ 
+-CPPFLAGS = @CPPFLAGS@ @DEFS@ -DMODULE_DIR=\"$(libdir)/ivl\"
+-CXXFLAGS = @CXXFLAGS@ -I. -I$(srcdir)/..
++CPPFLAGS = -I. -I$(srcdir)/.. @CPPFLAGS@ @DEFS@ -DMODULE_DIR=\"$(libdir)/ivl\"
++CXXFLAGS = @CXXFLAGS@ 
+ LDFLAGS = @LDFLAGS@
+ 
diff --git a/cad/verilog-current/patches/patch-af b/cad/verilog-current/patches/patch-af
new file mode 100644
index 00000000000..98f343a765f
--- /dev/null
+++ b/cad/verilog-current/patches/patch-af
@@ -0,0 +1,11 @@
+$NetBSD: patch-af,v 1.1 2001/03/31 00:00:35 dmcmahill Exp $
+
+--- tgt-vvp/Makefile.in.orig	Thu Mar 22 00:06:21 2001
++++ tgt-vvp/Makefile.in	Fri Mar 30 10:45:46 2001
+@@ -47,5 +47,5 @@
+ %.o: %.c
+ 	@[ -d dep ] || mkdir dep
+-	$(CC) -Wall $(CPPFLAGS) -I$(srcdir)/.. -MD -c $< -o $*.o
++	$(CC) -Wall -I$(srcdir)/.. $(CPPFLAGS) -MD -c $< -o $*.o
+ 	mv $*.d dep
+ 
diff --git a/cad/verilog-current/patches/patch-ag b/cad/verilog-current/patches/patch-ag
new file mode 100644
index 00000000000..0d90975e7e2
--- /dev/null
+++ b/cad/verilog-current/patches/patch-ag
@@ -0,0 +1,11 @@
+$NetBSD: patch-ag,v 1.1 2001/03/31 00:00:36 dmcmahill Exp $
+
+--- vpi/Makefile.in.orig	Mon Mar 19 20:43:16 2001
++++ vpi/Makefile.in	Fri Mar 30 11:06:49 2001
+@@ -51,5 +51,5 @@
+ %.o: %.c
+ 	@[ -d dep ] || mkdir dep
+-	$(CC) -Wall $(CPPFLAGS) $(CFLAGS) -I$(srcdir) -I$(srcdir)/.. -MD -c $< -o $*.o
++	$(CC) -Wall -I$(srcdir) -I$(srcdir)/.. $(CPPFLAGS) $(CFLAGS) -MD -c $< -o $*.o
+ 	mv $*.d dep
+