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Set real nets with no driver to 0.0. 

In VAMS 2.3 real nets with no driver are defined to have a value of 0.0.
Setting them to High-Z was crashing the run time.
This commit is contained in:
Cary R 2009-01-02 14:10:22 -08:00 committed by Stephen Williams
parent d56bf3a5eb
commit 8eb7e4b3d4
1 changed files with 45 additions and 24 deletions
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69
tgt-vvp/draw_net_input.c
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@ -56,6 +56,21 @@ static ivl_signal_type_t signal_type_of_nexus(ivl_nexus_t nex)
return out;
}
static ivl_variable_type_t signal_data_type_of_nexus(ivl_nexus_t nex)
{
unsigned idx;
for (idx = 0 ; idx < ivl_nexus_ptrs(nex) ; idx += 1) {
ivl_nexus_ptr_t ptr = ivl_nexus_ptr(nex, idx);
ivl_signal_t sig = ivl_nexus_ptr_sig(ptr);
if (sig == 0) continue;
return ivl_signal_data_type(sig);
}
return IVL_VT_NO_TYPE;
}
static void draw_C4_repeated_constant(char bit_char, unsigned width)
{
unsigned idx;
@ -583,32 +598,38 @@ char* draw_net_input_x(ivl_nexus_t nex,
nex_data->flags |= nex_flags;
}
/* If the nexus has no drivers, then send a constant HiZ into
the net. */
/* If the nexus has no drivers, then send a constant HiZ or
0.0 into the net. */
if (ndrivers == 0) {
unsigned jdx, wid = width_of_nexus(nex);
char*tmp = malloc(wid + 5);
nex_private = tmp;
strcpy(tmp, "C4<");
tmp += strlen(tmp);
switch (res) {
case IVL_SIT_TRI:
for (jdx = 0 ; jdx < wid ; jdx += 1)
*tmp++ = 'z';
break;
case IVL_SIT_TRI0:
for (jdx = 0 ; jdx < wid ; jdx += 1)
*tmp++ = '0';
break;
case IVL_SIT_TRI1:
for (jdx = 0 ; jdx < wid ; jdx += 1)
*tmp++ = '1';
break;
default:
assert(0);
/* For real nets put 0.0. */
if (signal_data_type_of_nexus(nex) == IVL_VT_REAL) {
nex_private = draw_Cr_to_string(0.0);
} else {
unsigned jdx, wid = width_of_nexus(nex);
char*tmp = malloc(wid + 5);
nex_private = tmp;
strcpy(tmp, "C4<");
tmp += strlen(tmp);
switch (res) {
case IVL_SIT_TRI:
for (jdx = 0 ; jdx < wid ; jdx += 1)
*tmp++ = 'z';
break;
case IVL_SIT_TRI0:
for (jdx = 0 ; jdx < wid ; jdx += 1)
*tmp++ = '0';
break;
case IVL_SIT_TRI1:
for (jdx = 0 ; jdx < wid ; jdx += 1)
*tmp++ = '1';
break;
default:
assert(0);
}
*tmp++ = '>';
*tmp = 0;
}
*tmp++ = '>';
*tmp = 0;
if (island) {
char*tmp2 = draw_island_port(island, nex, nex_private);
free(nex_private);