iverilog/tgt-vvp
Cary R 5d7f8c9706 Update copyright in files changed in 2009
This patch updates the copyright notice in the files that
were modified in 2009. It also updates the normal programs
and the vvp target.
2009-01-08 20:03:34 -08:00
..
Makefile.in Keep source code version information in version files. 2009-01-05 21:43:21 -08:00
README.txt tgt-vvp generates code that skips nets as inputs. 2001-08-10 00:40:45 +00:00
draw_mux.c Content-free portability fixes. 2008-09-29 18:06:47 -07:00
draw_net_input.c Update copyright in files changed in 2009 2009-01-08 20:03:34 -08:00
draw_switch.c Content-free portability fixes. 2008-09-29 18:06:47 -07:00
draw_ufunc.c Content-free portability fixes. 2008-09-29 18:06:47 -07:00
draw_vpi.c Check that numbers fit into the correct immediate width (32 bits). 2008-10-13 19:56:46 -07:00
eval_bool.c Shadow reduction part 5 2008-12-18 16:42:55 -08:00
eval_expr.c Shadow reduction part 5 2008-12-18 16:42:55 -08:00
eval_real.c Shadow reduction part 5 2008-12-18 16:42:55 -08:00
modpath.c Content-free portability fixes. 2008-09-29 18:06:47 -07:00
vector.c Remove most of the lingering CVS droppings. 2008-12-05 21:48:28 -08:00
vvp-s.conf.in Remove redundant back-end selections. 2008-09-07 16:43:54 -07:00
vvp.c Update copyright in files changed in 2009 2009-01-08 20:03:34 -08:00
vvp.conf.in Remove redundant back-end selections. 2008-09-07 16:43:54 -07:00
vvp_config.h.in Remove most of the lingering CVS droppings. 2008-12-05 21:48:28 -08:00
vvp_priv.h Allow that sum immediate values can be signed. 2008-06-13 13:32:06 -07:00
vvp_process.c Add support for real/realtime arrays. 2008-11-01 20:44:03 -07:00
vvp_scope.c Fix for pr2123173. 2008-12-29 16:09:33 -08:00

README.txt

THE VVP TARGET

SYMBOL NAME CONVENTIONS

There are some naming conventions that the vp target uses for
generating symbol names.

* wires and regs

Nets and variables are named V_<full-name> where <full-name> is the
full hierarchical name of the signal.

* Logic devices

Logic devices (and, or, buf, bufz, etc.) are named L_<full_name>. In
this case the symbol is attached to a functor that is the output of
the logic device.


GENERAL FUNCTOR WEB STRUCTURE

The net of gates, signals and resolvers is formed from the input
design. The basic structure is wrapped around the nexus, which is
represented by the ivl_nexus_t.

Each nexus represents a resolved value. The input of the nexus is fed
by a single driver. If the nexus in the design has multiple drivers,
the drivers are first fed into a resolver (or a tree of resolvers) to
form a single output that is the nexus.

The nexus, then, feeds its output to the inputs of other gates, or to
the .net objects in the design.