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) {
assert(ivl_logic_width(lptr) == 1);
fprintf(vvp_out, ", C4<z>");
} else {
fprintf(vvp_out, ", %s", draw_net_input(nex));
}
}
fprintf(vvp_out, ";\n");
}
static char* draw_net_input_drive(ivl_nexus_t nex, ivl_nexus_ptr_t nptr)
{
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)||(ivl_logic_type(lptr)==IVL_LO_BUFT))
&& (nptr_pin == 0))
do {
if (! can_elide_bufz(lptr, nptr))
break;
return strdup(draw_net_input(ivl_logic_pin(lptr, 1)));
} while(0);
if (lptr && (ivl_logic_type(lptr) == IVL_LO_PULLDOWN)) {
return draw_net_pull(lptr, ivl_nexus_ptr_drive0(nptr), "0");
}
if (lptr && (ivl_logic_type(lptr) == IVL_LO_PULLUP)) {
return draw_net_pull(lptr, ivl_nexus_ptr_drive1(nptr), "1");
}
if (lptr && (nptr_pin == 0)) {
char tmp[128];
snprintf(tmp, sizeof tmp, "L_%p", lptr);
return strdup(tmp);
}
sptr = ivl_nexus_ptr_sig(nptr);
if (sptr && (ivl_signal_type(sptr) == IVL_SIT_REG)) {
char tmp[128];
/* Input is a .var. This device may be a non-zero pin
because it may be an array of reg vectors. */
snprintf(tmp, sizeof tmp, "v%p_%u", sptr, nptr_pin);
if (ivl_signal_dimensions(sptr) > 0) {
fprintf(vvp_out, "v%p_%u .array/port v%p, %u;\n",
sptr, nptr_pin, sptr, nptr_pin);
}
return strdup(tmp);
}
cptr = ivl_nexus_ptr_con(nptr);
if (cptr) {
char tmp[64];
char *result = 0;
ivl_expr_t d_rise, d_fall, d_decay;
unsigned dly_width = 0;
char *dly;
/* Constants should have exactly 1 pin, with a literal value. */
assert(nptr_pin == 0);
switch (ivl_const_type(cptr)) {
case IVL_VT_LOGIC:
case IVL_VT_BOOL:
case IVL_VT_STRING:
if ((ivl_nexus_ptr_drive0(nptr) == IVL_DR_STRONG)
&& (ivl_nexus_ptr_drive1(nptr) == IVL_DR_STRONG)) {
result = draw_C4_to_string(cptr);
} else {
result = draw_C8_to_string(cptr,
ivl_nexus_ptr_drive0(nptr),
ivl_nexus_ptr_drive1(nptr));
}
dly_width = ivl_const_width(cptr);
break;
case IVL_VT_REAL:
result = draw_Cr_to_string(ivl_const_real(cptr));
dly_width = 0;
break;
default:
assert(0);
break;
}
d_rise = ivl_const_delay(cptr, 0);
d_fall = ivl_const_delay(cptr, 1);
d_decay = ivl_const_delay(cptr, 2);
dly = "";
if (d_rise != 0) {
draw_delay(cptr, dly_width, 0, d_rise, d_fall, d_decay);
dly = "/d";
}
fprintf(vvp_out, "L_%p%s .functor BUFT 1, %s, C4<0>, C4<0>, C4<0>;\n",
cptr, dly, result);
free(result);
snprintf(tmp, sizeof tmp, "L_%p", cptr);
return strdup(tmp);
}
lpm = ivl_nexus_ptr_lpm(nptr);
if (lpm) switch (ivl_lpm_type(lpm)) {
case IVL_LPM_FF:
case IVL_LPM_LATCH:
case IVL_LPM_ABS:
case IVL_LPM_ADD:
case IVL_LPM_ARRAY:
case IVL_LPM_CAST_INT2:
case IVL_LPM_CAST_INT:
case IVL_LPM_CAST_REAL:
case IVL_LPM_CONCAT:
case IVL_LPM_CONCATZ:
case IVL_LPM_CMP_EEQ:
case IVL_LPM_CMP_EQ:
case IVL_LPM_CMP_WEQ:
case IVL_LPM_CMP_WNE:
case IVL_LPM_CMP_EQX:
case IVL_LPM_CMP_EQZ:
case IVL_LPM_CMP_GE:
case IVL_LPM_CMP_GT:
case IVL_LPM_CMP_NE:
case IVL_LPM_CMP_NEE:
case IVL_LPM_RE_AND:
case IVL_LPM_RE_OR:
case IVL_LPM_RE_XOR:
case IVL_LPM_RE_NAND:
case IVL_LPM_RE_NOR:
case IVL_LPM_RE_XNOR:
case IVL_LPM_SFUNC:
case IVL_LPM_SHIFTL:
case IVL_LPM_SHIFTR:
case IVL_LPM_SIGN_EXT:
case IVL_LPM_SUB:
case IVL_LPM_MULT:
case IVL_LPM_MUX:
case IVL_LPM_POW:
case IVL_LPM_DIVIDE:
case IVL_LPM_MOD:
case IVL_LPM_UFUNC:
case IVL_LPM_PART_VP:
case IVL_LPM_PART_PV: /* NOTE: This is only a partial driver. */
case IVL_LPM_REPEAT:
case IVL_LPM_SUBSTITUTE:
if (ivl_lpm_q(lpm) == nex) {
char tmp[128];
snprintf(tmp, sizeof tmp, "L_%p", lpm);
return strdup(tmp);
}
break;
}
fprintf(stderr, "vvp.tgt error: no input to nexus.\n");
assert(0);
return strdup("C<z>");
}