/
vvp_scope.c
1988 lines (1687 loc) · 50.3 KB
/
vvp_scope.c
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/*
* Copyright (c) 2001-2003 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: vvp_scope.c,v 1.103.2.6 2006/04/16 19:26:41 steve Exp $"
#endif
# include "vvp_priv.h"
# include <assert.h>
#ifdef HAVE_MALLOC_H
# include <malloc.h>
#endif
# include <stdlib.h>
# include <string.h>
/*
* Escape non-symbol chararacters in ids, and quotes in strings.
*/
inline static char hex_digit(unsigned i)
{
i &= 0xf;
return i>=10 ? i-10+'A' : i+'0';
}
ivl_attribute_t find_lpm_attr(ivl_lpm_t net, const char*key)
{
unsigned idx;
for (idx = 0 ; idx < ivl_lpm_attr_cnt(net) ; idx += 1) {
ivl_attribute_t atr = ivl_lpm_attr_val(net, idx);
if (strcmp(key,atr->key) == 0)
return atr;
}
return 0;
}
const char *vvp_mangle_id(const char *id)
{
static char *out = 0x0;
static size_t out_len;
int nesc = 0;
int iout = 0;
const char *inp = id;
const char nosym[] = "!\"#%&'()*+,-/:;<=>?@[\\]^`{|}~";
char *se = strpbrk(inp, nosym);
if (!se)
return id;
do {
int n = se - inp;
unsigned int nlen = strlen(id) + 4*(++nesc) + 1;
if (out_len < nlen) {
out = realloc(out, nlen);
assert(out);
out_len = nlen;
}
if (n) {
strncpy(out+iout, inp, n);
iout += n;
}
inp += n+1;
out[iout++] = '\\';
switch (*se) {
case '\\':
case '/':
case '<':
case '>':
out[iout++] = *se;
break;
default:
out[iout++] = 'x';
out[iout++] = hex_digit(*se >> 4);
out[iout++] = hex_digit(*se);
break;
}
se = strpbrk(inp, nosym);
} while (se);
strcpy(out+iout, inp);
return out;
}
const char *vvp_mangle_name(const char *id)
{
static char *out = 0x0;
static size_t out_len;
int nesc = 0;
int iout = 0;
const char *inp = id;
const char nosym[] = "\"\\";
char *se = strpbrk(inp, nosym);
if (!se)
return id;
do {
int n = se - inp;
unsigned int nlen = strlen(id) + 2*(++nesc) + 1;
if (out_len < nlen) {
out = realloc(out, nlen);
assert(out);
out_len = nlen;
}
if (n) {
strncpy(out+iout, inp, n);
iout += n;
}
inp += n+1;
out[iout++] = '\\';
out[iout++] = *se;
se = strpbrk(inp, nosym);
} while (se);
strcpy(out+iout, inp);
return out;
}
/*
* Given a signal, generate a string name that is suitable for use as
* a label. The only rule is that the same signal will always have the
* same label. The result is stored in static memory, so remember to
* copy it out.
*/
const char* vvp_signal_label(ivl_signal_t sig)
{
static char buf[32];
sprintf(buf, "$%p", sig);
return buf;
}
const char* vvp_word_label(ivl_variable_t sig)
{
static char buf[32];
sprintf(buf, "$%p", sig);
return buf;
}
/*
* This makes a string suitable for use as a label for memories.
*/
const char* vvp_memory_label(ivl_memory_t mem)
{
static char buf[32];
sprintf(buf, "$%p", mem);
return buf;
}
ivl_signal_type_t signal_type_of_nexus(ivl_nexus_t nex)
{
unsigned idx;
ivl_signal_type_t out = IVL_SIT_TRI;
for (idx = 0 ; idx < ivl_nexus_ptrs(nex) ; idx += 1) {
ivl_signal_type_t stype;
ivl_nexus_ptr_t ptr = ivl_nexus_ptr(nex, idx);
ivl_signal_t sig = ivl_nexus_ptr_sig(ptr);
if (sig == 0)
continue;
stype = ivl_signal_type(sig);
if (stype == IVL_SIT_REG)
continue;
if (stype == IVL_SIT_TRI)
continue;
if (stype == IVL_SIT_NONE)
continue;
out = stype;
}
return out;
}
ivl_nexus_ptr_t ivl_logic_pin_ptr(ivl_net_logic_t net, unsigned pin)
{
ivl_nexus_t nex = ivl_logic_pin(net, pin);
unsigned idx;
for (idx = 0 ; idx < ivl_nexus_ptrs(nex) ; idx += 1) {
ivl_nexus_ptr_t ptr = ivl_nexus_ptr(nex, idx);
ivl_net_logic_t tmp = ivl_nexus_ptr_log(ptr);
if (tmp == 0)
continue;
if (tmp != net)
continue;
if (ivl_nexus_ptr_pin(ptr) != pin)
continue;
return ptr;
}
assert(0);
return 0;
}
const char*drive_string(ivl_drive_t drive)
{
switch (drive) {
case IVL_DR_HiZ:
return "";
case IVL_DR_SMALL:
return "sm";
case IVL_DR_MEDIUM:
return "me";
case IVL_DR_WEAK:
return "we";
case IVL_DR_LARGE:
return "la";
case IVL_DR_PULL:
return "pu";
case IVL_DR_STRONG:
return "";
case IVL_DR_SUPPLY:
return "su";
}
return "";
}
/*
* The draw_scope function draws the major functional items within a
* scope. This includes the scopes themselves, of course. All the
* other functions in this file are in support of that task.
*/
/*
* NEXUS
* ivl builds up the netlist into objects connected together by
* ivl_nexus_t objects. The nexus receives all the drivers of the
* point in the net and resolves the value. The result is then sent to
* all the nets that are connected to the nexus. The nets, then, are
* read to get the value of the nexus.
*
* NETS
* Nets are interesting and special, because a nexus may be connected
* to several of them at once. This can happen, for example, as an
* artifact of module port connects, where the inside and the outside
* of the module are connected through an in-out port. (In fact, ivl
* will simply connect signals that are bound through a port, because
* the input/output/inout properties are enforced as compile time.)
*
* This case is handled by choosing one to receive the value of the
* nexus. This one then feeds to another net at the nexus, and so
* on. The last net is selected as the output of the nexus.
*/
/*
* This tests a bufz device against an output receiver, and determines
* if the device can be skipped. If this function returns true, then a
* gate will be generated for this node. Otherwise, the code generator
* will connect its input to its output and skip the gate.
*/
static int can_elide_bufz(ivl_net_logic_t net, ivl_nexus_ptr_t nptr)
{
ivl_nexus_t in_n;
unsigned idx;
/* These are the drives we expect. */
ivl_drive_t dr0 = ivl_nexus_ptr_drive0(nptr);
ivl_drive_t dr1 = ivl_nexus_ptr_drive1(nptr);
int drive_count = 0;
/* If the gate carries a delay, it must remain. */
if (ivl_logic_delay(net, 0) != 0)
return 0;
/* If the input is connected to the output, then do not elide
the gate. This is some sort of cycle. */
if (ivl_logic_pin(net, 0) == ivl_logic_pin(net, 1))
return 0;
in_n = ivl_logic_pin(net, 1);
for (idx = 0 ; idx < ivl_nexus_ptrs(in_n) ; idx += 1) {
ivl_nexus_ptr_t in_np = ivl_nexus_ptr(in_n, idx);
if (ivl_nexus_ptr_log(in_np) == net)
continue;
/* If the driver for the source does not match the
expected drive, then we need to keep the bufz. This
test also catches the case that the input device is
really also an input, as that device will have a
drive of HiZ. We need to keep BUFZ devices in that
case in order to prevent back-flow of data. */
if (ivl_nexus_ptr_drive0(in_np) != dr0)
return 0;
if (ivl_nexus_ptr_drive1(in_np) != dr1)
return 0;
drive_count += 1;
}
/* If the BUFZ input has multiple drivers on its input, then
we need to keep this device in order to hide the
resolution. */
if (drive_count != 1)
return 0;
return 1;
}
/*
* This function takes a nexus and looks for an input functor. It then
* draws to the output a string that represents that functor. What we
* are trying to do here is find the input to the net that is attached
* to this nexus.
*/
static const char* draw_net_input_drive(ivl_nexus_t nex, ivl_nexus_ptr_t nptr)
{
static char result[2048];
unsigned idx;
unsigned nptr_pin = ivl_nexus_ptr_pin(nptr);
ivl_net_const_t cptr;
ivl_net_logic_t lptr;
ivl_signal_t sptr;
ivl_lpm_t lpm;
lptr = ivl_nexus_ptr_log(nptr);
if (lptr && (ivl_logic_type(lptr) == IVL_LO_BUFZ) && (nptr_pin == 0))
do {
if (! can_elide_bufz(lptr, nptr))
break;
return draw_net_input(ivl_logic_pin(lptr, 1));
} while(0);
if (lptr && (ivl_logic_type(lptr) == IVL_LO_PULLDOWN)) {
return "C<pu0>";
}
if (lptr && (ivl_logic_type(lptr) == IVL_LO_PULLUP)) {
return "C<pu1>";
}
if (lptr && (nptr_pin == 0)) {
sprintf(result, "L_%p", lptr);
return result;
}
sptr = ivl_nexus_ptr_sig(nptr);
if (sptr && (ivl_signal_type(sptr) == IVL_SIT_REG)) {
sprintf(result, "V_%s[%u]", vvp_signal_label(sptr), nptr_pin);
return result;
}
cptr = ivl_nexus_ptr_con(nptr);
if (cptr) {
const char*bits = ivl_const_bits(cptr);
ivl_drive_t drive;
switch (bits[nptr_pin]) {
case '0':
drive = ivl_nexus_ptr_drive0(nptr);
if (drive == IVL_DR_HiZ)
sprintf(result, "C<z>");
else
sprintf(result, "C<%s0>", drive_string(drive));
break;
case '1':
drive = ivl_nexus_ptr_drive1(nptr);
if (drive == IVL_DR_HiZ)
sprintf(result, "C<z>");
else
sprintf(result, "C<%s1>", drive_string(drive));
break;
default:
sprintf(result, "C<%c>", bits[nptr_pin]);
}
return result;
}
lpm = ivl_nexus_ptr_lpm(nptr);
if (lpm) switch (ivl_lpm_type(lpm)) {
case IVL_LPM_DECODE:
/* The decoder has no outputs.
(It is bound to other devices.) */
break;
case IVL_LPM_FF:
case IVL_LPM_MUX:
case IVL_LPM_DEMUX:
for (idx = 0 ; idx < ivl_lpm_width(lpm) ; idx += 1)
if (ivl_lpm_q(lpm, idx) == nex) {
sprintf(result, "L_%s.%s/%u",
vvp_mangle_id(ivl_scope_name(ivl_lpm_scope(lpm))),
vvp_mangle_id(ivl_lpm_basename(lpm)), idx);
return result;
}
break;
/* The output for a RAM depends on whether it is
exploded or not. If it is, treat is like a MUX. If it
is not, treat it like an arithmetic LPM. */
case IVL_LPM_RAM:
if (ivl_lpm_memory(lpm)) {
for (idx = 0 ; idx < ivl_lpm_width(lpm) ; idx += 1) {
if (ivl_lpm_q(lpm, idx) == nex) {
sprintf(result, "L_%p[%u]", lpm, idx);
return result;
}
}
} else {
for (idx = 0 ; idx < ivl_lpm_width(lpm) ; idx += 1) {
if (ivl_lpm_q(lpm, idx) == nex) {
sprintf(result, "L_%s.%s/%u",
vvp_mangle_id(ivl_scope_name(ivl_lpm_scope(lpm))),
vvp_mangle_id(ivl_lpm_basename(lpm)), idx);
return result;
}
}
}
break;
case IVL_LPM_ADD:
case IVL_LPM_SHIFTL:
case IVL_LPM_SHIFTR:
case IVL_LPM_SUB:
case IVL_LPM_MULT:
case IVL_LPM_DIVIDE:
case IVL_LPM_MOD:
case IVL_LPM_UFUNC:
for (idx = 0 ; idx < ivl_lpm_width(lpm) ; idx += 1)
if (ivl_lpm_q(lpm, idx) == nex) {
sprintf(result, "L_%p[%u]", lpm, idx);
return result;
}
break;
case IVL_LPM_CMP_GE:
case IVL_LPM_CMP_GT:
case IVL_LPM_CMP_EQ:
case IVL_LPM_CMP_NE:
if (ivl_lpm_q(lpm, 0) == nex) {
sprintf(result, "L_%s.%s",
vvp_mangle_id(ivl_scope_name(ivl_lpm_scope(lpm))),
vvp_mangle_id(ivl_lpm_basename(lpm)));
return result;
}
break;
}
fprintf(stderr, "internal error: no input to nexus %s\n",
ivl_nexus_name(nex));
assert(0);
return "C<z>";
}
/*
* This function draws the input to a net. What that means is that it
* returns a static string that can be used to represent a resolved
* driver to a nexus. If there are multiple drivers to the nexus, then
* it writes out the resolver declarations needed to perform strength
* resolution.
*
* The string that this returns is bound to the nexus, so the pointer
* remains valid.
*/
const char* draw_net_input(ivl_nexus_t nex)
{
ivl_signal_type_t res;
char result[512];
unsigned idx;
int level;
unsigned ndrivers = 0;
static ivl_nexus_ptr_t *drivers = 0x0;
static unsigned adrivers = 0;
const char*resolv_type;
/* If this nexus already has a label, then its input is
already figured out. Just return the existing label. */
char*nex_private = (char*)ivl_nexus_get_private(nex);
if (nex_private)
return nex_private;
res = signal_type_of_nexus(nex);
switch (res) {
case IVL_SIT_TRI:
resolv_type = "tri";
break;
case IVL_SIT_TRI0:
resolv_type = "tri0";
break;
case IVL_SIT_TRI1:
resolv_type = "tri1";
break;
case IVL_SIT_TRIAND:
resolv_type = "triand";
break;
case IVL_SIT_TRIOR:
resolv_type = "trior";
break;
/* Catch the special cases that the nets are supply
nets. Drive constant values uncomditionally. */
case IVL_SIT_SUPPLY0:
nex_private = "C<su0>";
ivl_nexus_set_private(nex, nex_private);
return nex_private;
case IVL_SIT_SUPPLY1:
nex_private = "C<su1>";
ivl_nexus_set_private(nex, nex_private);
return nex_private;
default:
fprintf(stderr, "vvp.tgt: Unsupported signal type: %u\n", res);
assert(0);
resolv_type = "tri";
break;
}
for (idx = 0 ; idx < ivl_nexus_ptrs(nex) ; idx += 1) {
ivl_nexus_ptr_t nptr = ivl_nexus_ptr(nex, idx);
/* Skip input only pins. */
if ((ivl_nexus_ptr_drive0(nptr) == IVL_DR_HiZ)
&& (ivl_nexus_ptr_drive1(nptr) == IVL_DR_HiZ))
continue;
/* Save this driver. */
if (ndrivers >= adrivers) {
adrivers += 4;
drivers = realloc(drivers, adrivers*sizeof(ivl_nexus_ptr_t));
assert(drivers);
}
drivers[ndrivers] = nptr;
ndrivers += 1;
}
/* If the nexus has no drivers, then send a constant HiZ into
the net. */
if (ndrivers == 0) {
switch (res) {
case IVL_SIT_TRI:
nex_private = "C<z>";
break;
case IVL_SIT_TRI0:
nex_private = "C<0>";
break;
case IVL_SIT_TRI1:
nex_private = "C<1>";
break;
default:
assert(0);
}
ivl_nexus_set_private(nex, nex_private);
return nex_private;
}
/* If the nexus has exactly one driver, then simply draw
it. Note that this will *not* work if the nexus is not a
TRI type nexus. */
if (ndrivers == 1 && res == IVL_SIT_TRI) {
nex_private = strdup(draw_net_input_drive(nex, drivers[0]));
ivl_nexus_set_private(nex, nex_private);
return nex_private;
}
level = 0;
while (ndrivers) {
unsigned int inst;
for (inst = 0; inst < ndrivers; inst += 4) {
if (ndrivers > 4)
fprintf(vvp_out, "RS_%p/%d/%d .resolv tri",
nex, level, inst);
else
fprintf(vvp_out, "RS_%p .resolv %s",
nex, resolv_type);
for (idx = inst; idx < ndrivers && idx < inst+4; idx += 1) {
if (level) {
fprintf(vvp_out, ", RS_%p/%d/%d",
nex, level - 1, idx*4);
} else {
fprintf(vvp_out, ", %s",
draw_net_input_drive(nex, drivers[idx]));
}
}
for ( ; idx < inst+4 ; idx += 1)
fprintf(vvp_out, ", C<z>");
fprintf(vvp_out, ";\n");
}
if (ndrivers > 4)
ndrivers = (ndrivers+3) / 4;
else
ndrivers = 0;
level += 1;
}
sprintf(result, "RS_%p", nex);
nex_private = strdup(result);
ivl_nexus_set_private(nex, nex_private);
return nex_private;
}
/*
* This function looks at the nexus in search of the net to attach
* functor inputs to. Sort the signals in the nexus by name, and
* choose the lexically earliest one.
*/
void draw_input_from_net(ivl_nexus_t nex)
{
const char*nex_private = (const char*)ivl_nexus_get_private(nex);
if (nex_private == 0)
nex_private = draw_net_input(nex);
assert(nex_private);
fprintf(vvp_out, "%s", nex_private);
}
/*
* This function draws a reg/int/variable in the scope. This is a very
* simple device to draw as there are no inputs to connect so no need
* to scan the nexus.
*/
static void draw_reg_in_scope(ivl_signal_t sig)
{
int msb = ivl_signal_msb(sig);
int lsb = ivl_signal_lsb(sig);
const char*signed_flag = ivl_signal_integer(sig) ? "/i" :
ivl_signal_signed(sig)? "/s" : "";
fprintf(vvp_out, "V_%s .var%s \"%s\", %d, %d;\n",
vvp_signal_label(sig), signed_flag,
vvp_mangle_name(ivl_signal_basename(sig)), msb, lsb);
}
/*
* This function draws a net. This is a bit more complicated as we
* have to find an appropriate functor to connect to the input.
*/
static void draw_net_in_scope(ivl_signal_t sig)
{
unsigned idx;
int msb = ivl_signal_msb(sig);
int lsb = ivl_signal_lsb(sig);
typedef const char*const_charp;
const_charp* args;
const char*signed_flag = ivl_signal_signed(sig)? "/s" : "";
/* Skip the local signal. */
if (ivl_signal_local(sig))
return;
args = (const_charp*)calloc(ivl_signal_pins(sig), sizeof(char*));
/* Connect all the pins of the signal to something. */
for (idx = 0 ; idx < ivl_signal_pins(sig) ; idx += 1) {
ivl_nexus_t nex = ivl_signal_pin(sig, idx);
args[idx] = draw_net_input(nex);
}
fprintf(vvp_out, "V_%s .net%s \"%s\", %d, %d",
vvp_signal_label(sig), signed_flag,
vvp_mangle_name(ivl_signal_basename(sig)), msb, lsb);
for (idx = 0 ; idx < ivl_signal_pins(sig) ; idx += 1) {
fprintf(vvp_out, ", %s", args[idx]);
}
fprintf(vvp_out, ";\n");
free(args);
}
static void draw_delay(ivl_net_logic_t lptr)
{
unsigned d0 = ivl_logic_delay(lptr, 0);
unsigned d1 = ivl_logic_delay(lptr, 1);
unsigned d2 = ivl_logic_delay(lptr, 2);
if (d0 == 0 && d1 == 0 && d2 == 0)
return;
if (d0 == d1 && d1 == d2)
fprintf(vvp_out, " (%d)", d0);
else
fprintf(vvp_out, " (%d,%d,%d)", d0, d1, d2);
}
static void draw_udp_def(ivl_udp_t udp)
{
unsigned init;
unsigned i;
switch (ivl_udp_init(udp))
{
case '0':
init = 0;
break;
case '1':
init = 1;
break;
default:
init = 2;
break;
}
if (ivl_udp_sequ(udp))
fprintf(vvp_out,
"UDP_%s .udp/sequ \"%s\", %d, %d",
vvp_mangle_id(ivl_udp_name(udp)),
vvp_mangle_name(ivl_udp_name(udp)),
ivl_udp_nin(udp),
init );
else
fprintf(vvp_out,
"UDP_%s .udp/comb \"%s\", %d",
vvp_mangle_id(ivl_udp_name(udp)),
vvp_mangle_name(ivl_udp_name(udp)),
ivl_udp_nin(udp));
for (i=0; i<ivl_udp_rows(udp); i++)
fprintf(vvp_out, "\n ,\"%s\"", ivl_udp_row(udp, i) );
fprintf(vvp_out, ";\n");
}
static void draw_udp_in_scope(ivl_net_logic_t lptr)
{
unsigned pdx;
ivl_udp_t udp = ivl_logic_udp(lptr);
static ivl_udp_t *udps = 0x0;
static int nudps = 0;
int i;
for (i=0; i<nudps; i++)
if (udps[i] == udp)
break;
if (i >= nudps)
{
udps = realloc(udps, (nudps+1)*sizeof(ivl_udp_t));
assert(udps);
udps[nudps++] = udp;
draw_udp_def(udp);
}
fprintf(vvp_out, "L_%p .udp", lptr);
fprintf(vvp_out, " UDP_%s",
vvp_mangle_id(ivl_udp_name(udp)));
draw_delay(lptr);
for (pdx = 1 ; pdx < ivl_logic_pins(lptr) ; pdx += 1) {
ivl_nexus_t nex = ivl_logic_pin(lptr, pdx);
/* Unlike other logic gates, primitives may have unconnected
inputs. The proper behavior is to attach a HiZ to the
port. */
if (nex == 0) {
fprintf(vvp_out, ", C<z>");
} else {
fprintf(vvp_out, ", ");
draw_input_from_net(nex);
}
}
fprintf(vvp_out, ";\n");
}
static void draw_logic_in_scope(ivl_net_logic_t lptr)
{
unsigned pdx;
const char*ltype = "?";
const char*lcasc = 0x0;
char identity_val = '0';
ivl_drive_t str0, str1;
int level;
int ninp = ivl_logic_pins(lptr) - 1;
typedef const char*const_charp;
const_charp*input_strings = calloc(ninp, sizeof(const_charp));
for (pdx = 0 ; pdx < ninp ; pdx += 1) {
ivl_nexus_t nex = ivl_logic_pin(lptr, pdx+1);
if (nex == 0) {
/* Only UDPs can have unconnected inputs. */
assert(ivl_logic_type(lptr) == IVL_LO_UDP);
input_strings[pdx] = 0;
} else {
input_strings[pdx] = draw_net_input(nex);
}
}
switch (ivl_logic_type(lptr)) {
case IVL_LO_UDP:
free(input_strings);
draw_udp_in_scope(lptr);
return;
case IVL_LO_BUFZ: {
/* Draw bufz objects, but only if the gate cannot
be elided. If I can elide it, then the
draw_nex_input will take care of it for me. */
ivl_nexus_ptr_t nptr = ivl_logic_pin_ptr(lptr,0);
ltype = "BUFZ";
if (can_elide_bufz(lptr, nptr))
return;
break;
}
case IVL_LO_PULLDOWN:
case IVL_LO_PULLUP:
/* Skip pullup and pulldown objects. Things that have
pull objects as inputs will instead generate the
appropriate C<?> symbol. */
free(input_strings);
return;
case IVL_LO_AND:
ltype = "AND";
identity_val = '1';
break;
case IVL_LO_BUF:
ltype = "BUF";
break;
case IVL_LO_BUFIF0:
ltype = "BUFIF0";
break;
case IVL_LO_BUFIF1:
ltype = "BUFIF1";
break;
case IVL_LO_NAND:
ltype = "NAND";
lcasc = "AND";
identity_val = '1';
break;
case IVL_LO_NOR:
ltype = "NOR";
lcasc = "OR";
break;
case IVL_LO_NOT:
ltype = "NOT";
break;
case IVL_LO_OR:
ltype = "OR";
break;
case IVL_LO_XNOR:
ltype = "XNOR";
lcasc = "XOR";
break;
case IVL_LO_XOR:
ltype = "XOR";
break;
case IVL_LO_EEQ:
ltype = "EEQ";
break;
case IVL_LO_PMOS:
ltype = "PMOS";
break;
case IVL_LO_NMOS:
ltype = "NMOS";
break;
case IVL_LO_RPMOS:
ltype = "RPMOS";
break;
case IVL_LO_RNMOS:
ltype = "RNMOS";
break;
case IVL_LO_NOTIF0:
ltype = "NOTIF0";
break;
case IVL_LO_NOTIF1:
ltype = "NOTIF1";
break;
default:
fprintf(stderr, "vvp.tgt: error: Unhandled logic type: %u\n",
ivl_logic_type(lptr));
ltype = "?";
break;
}
{ ivl_nexus_t nex = ivl_logic_pin(lptr, 0);
ivl_nexus_ptr_t nptr = 0;
unsigned idx;
for (idx = 0 ; idx < ivl_nexus_ptrs(nex) ; idx += 1) {
nptr = ivl_nexus_ptr(nex,idx);
if (ivl_nexus_ptr_log(nptr) != lptr)
continue;
if (ivl_nexus_ptr_pin(nptr) != 0)
continue;
break;
}
str0 = ivl_nexus_ptr_drive0(nptr);
str1 = ivl_nexus_ptr_drive1(nptr);
}
if (!lcasc)
lcasc = ltype;
/* Get all the input label that I will use for parameters to
the functor that I create later. */
ninp = ivl_logic_pins(lptr) - 1;
input_strings = calloc(ninp, sizeof(char*));
for (pdx = 0 ; pdx < ninp ; pdx += 1)
input_strings[pdx] = draw_net_input(ivl_logic_pin(lptr, pdx+1));
level = 0;
ninp = ivl_logic_pins(lptr) - 1;
while (ninp) {
int inst;
for (inst = 0; inst < ninp; inst += 4) {
if (ninp > 4)
fprintf(vvp_out, "L_%p/%d/%d .functor %s",
lptr, level, inst, lcasc);
else {
fprintf(vvp_out, "L_%p .functor %s",
lptr, ltype);
draw_delay(lptr);
if (str0 != IVL_DR_STRONG || str1 != IVL_DR_STRONG)
fprintf(vvp_out, " [%u %u]", str0, str1);
}
for (pdx = inst; pdx < ninp && pdx < inst+4 ; pdx += 1) {
if (level) {
fprintf(vvp_out, ", L_%p/%d/%d",
lptr, level - 1, pdx*4);
} else {
fprintf(vvp_out, ", %s", input_strings[pdx]);
}
}
for ( ; pdx < inst+4 ; pdx += 1) {
fprintf(vvp_out, ", C<%c>", identity_val);
}
fprintf(vvp_out, ";\n");
}
if (ninp > 4)
ninp = (ninp+3) / 4;
else
ninp = 0;
level += 1;
}
/* Free the array of char*. The strings themselves are
persistent, held by the ivl_nexus_t objects. */
free(input_strings);
}
static void draw_event_in_scope(ivl_event_t obj)
{