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Allow &PV<> to reference a VPI object (signal) for the base. 

This patch adds code to allow &PV<> to access a VPI object
(signal) for the base of an indexed part select. This
mirrors the code added to &A<>.
This commit is contained in:
Cary R 2008-06-13 16:22:18 -07:00 committed by Stephen Williams
parent 50a8c17cf8
commit f78994b66c
4 changed files with 41 additions and 4 deletions
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12
tgt-vvp/draw_vpi.c
View File

@ -212,9 +212,10 @@ static void draw_vpi_taskfunc_args(const char*call_string,
if (word_ex && ivl_expr_type(word_ex)==IVL_EX_SIGNAL) {
/* Special case: the index is a signal. */
snprintf(buffer, sizeof buffer,
"&A<v%p, v%p_0 >", sig, ivl_expr_signal(word_ex));
"&A<v%p, v%p_0 >", sig,
ivl_expr_signal(word_ex));
} else if (word_ex) {
/* fallback case: evaluate expression. */
/* Fallback case: evaluate expression. */
struct vector_info av;
av = draw_eval_expr(word_ex, STUFF_OK_XZ);
snprintf(buffer, sizeof buffer,
@ -250,7 +251,14 @@ static void draw_vpi_taskfunc_args(const char*call_string,
get_number_immediate(bexpr),
ivl_expr_width(expr));
/* This is an indexed bit/part select. */
} else if (ivl_expr_type(bexpr) == IVL_EX_SIGNAL) {
/* Sepcial case: the base is a signal. */
snprintf(buffer, sizeof buffer, "&PV<v%p_0, v%p_0, %u>",
ivl_expr_signal(vexpr),
ivl_expr_signal(bexpr),
ivl_expr_width(expr));
} else {
/* Fallback case: evaluate the expression. */
struct vector_info rv;
rv = draw_eval_expr(bexpr, STUFF_OK_XZ);
snprintf(buffer, sizeof buffer, "&PV<v%p_0, %u %u, %u>",

2
vvp/parse.y
View File

@ -825,6 +825,8 @@ argument
{ $$ = vpip_make_PV($3, $5, $7); }
| K_PV '<' T_SYMBOL ',' '-' T_NUMBER ',' T_NUMBER '>'
{ $$ = vpip_make_PV($3, -$6, $8); }
| K_PV '<' T_SYMBOL ',' T_SYMBOL ',' T_NUMBER '>'
{ $$ = vpip_make_PV($3, $5, $7); }
| K_PV '<' T_SYMBOL ',' T_NUMBER T_NUMBER ',' T_NUMBER '>'
{ $$ = vpip_make_PV($3, $5, $6, $8); }
;

2
vvp/vpi_priv.h
View File

@ -228,10 +228,12 @@ struct __vpiPV {
struct __vpiHandle base;
vpiHandle parent;
vvp_net_t*net;
vpiHandle sbase;
int tbase;
unsigned twid, width;
};
extern vpiHandle vpip_make_PV(char*name, int base, int width);
extern vpiHandle vpip_make_PV(char*name, char*symbol, int width);
extern vpiHandle vpip_make_PV(char*name, int tbase, int twid, int width);
extern struct __vpiPV* vpip_PV_from_handle(vpiHandle obj);

29
vvp/vpi_signal.cc
View File

@ -946,12 +946,21 @@ vpiHandle vpip_make_net(const char*name, int msb, int lsb,
static int PV_get_base(struct __vpiPV*rfp)
{
/* We return from the symbol base if it is defined. */
if (rfp->sbase != 0) {
s_vpi_value val;
val.format = vpiIntVal;
vpi_get_value(rfp->sbase, &val);
return val.value.integer;
}
/* If the width is zero then tbase is the constant. */
if (rfp->twid == 0) return rfp->tbase;
int tval = 0;
for (unsigned idx = 0 ; idx < rfp->twid ; idx += 1) {
vvp_bit4_t bit = vthread_get_bit(vpip_current_vthread,
rfp->tbase + idx);
rfp->tbase + idx);
if (bit == BIT4_1) {
tval |= 1<<idx;
}
@ -1156,10 +1165,10 @@ struct __vpiPV* vpip_PV_from_handle(vpiHandle obj)
vpiHandle vpip_make_PV(char*var, int base, int width)
{
struct __vpiPV*obj = (struct __vpiPV*) malloc(sizeof(struct __vpiPV));
obj->base.vpi_type = &vpip_PV_rt;
obj->parent = vvp_lookup_handle(var);
obj->sbase = 0;
obj->tbase = base;
obj->twid = 0;
obj->width = (unsigned) width;
@ -1169,11 +1178,27 @@ vpiHandle vpip_make_PV(char*var, int base, int width)
return &obj->base;
}
vpiHandle vpip_make_PV(char*var, char*symbol, int width)
{
struct __vpiPV*obj = (struct __vpiPV*) malloc(sizeof(struct __vpiPV));
obj->base.vpi_type = &vpip_PV_rt;
obj->parent = vvp_lookup_handle(var);
compile_vpi_lookup(&obj->sbase, symbol);
obj->tbase = 0;
obj->twid = 0;
obj->width = (unsigned) width;
obj->net = (vvp_net_t*) malloc(sizeof(vvp_net_t));
functor_ref_lookup(&obj->net, var);
return &obj->base;
}
vpiHandle vpip_make_PV(char*var, int tbase, int twid, int width)
{
struct __vpiPV*obj = (struct __vpiPV*) malloc(sizeof(struct __vpiPV));
obj->base.vpi_type = &vpip_PV_rt;
obj->parent = vvp_lookup_handle(var);
obj->sbase = 0;
obj->tbase = tbase;
obj->twid = (unsigned) twid;
obj->width = (unsigned) width;