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Support vpiModule, bug1469.

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Add very basic support for vpiModule. Basically it allows to traverse
the module tree to find a variable etc. It does not support more than
vpi_iterate and vpi_scan for vpiModule along basic operations like
vpi_get_str on vpiModule.

The support is added non-intrusively to non-VPI verilator runs. It
essentially:

 - Tracks the creation of cell instances and keeps them alive until
   the emit phase. They are there converted to scopes if modules.

 - Emits empty (don't add anything during construction)
   VerilatedScopes for all inlined modules, only for those inlined
   modules that are on the hierarchical path to public variables.

 - Adds VerilatedHierarchy as abstraction to structure of the
   scopes. It is only created for VPI designs. It allows to traverse
   the hierarchy from the top (NULL).

Signed-off-by: Stefan Wallentowitz <[email protected]>
Signed-off-by: Wilson Snyder <[email protected]>
This commit is contained in:
Stefan Wallentowitz
2019-10-01 21:57:45 -04:00
committed by Wilson Snyder
parent 66209d1114
commit 045ff25f80
14 changed files with 634 additions and 50 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/verilated.cpp
+9 -1
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@@ -2101,6 +2101,7 @@ void* VerilatedVarProps::datapAdjustIndex(void* datap, int dim, int indx) const
VerilatedScope::VerilatedScope() {
m_callbacksp = NULL;
m_namep = NULL;
m_identifierp = NULL;
m_funcnumMax = 0;
m_symsp = NULL;
m_varsp = NULL;
@@ -2116,15 +2117,18 @@ VerilatedScope::~VerilatedScope() {
}
void VerilatedScope::configure(VerilatedSyms* symsp, const char* prefixp,
const char* suffixp) VL_MT_UNSAFE {
const char* suffixp, const char* identifier,
const Type type) VL_MT_UNSAFE {
// Slowpath - called once/scope at construction
// We don't want the space and reference-count access overhead of strings.
m_symsp = symsp;
m_type = type;
char* namep = new char[strlen(prefixp)+strlen(suffixp)+2];
strcpy(namep, prefixp);
if (*prefixp && *suffixp) strcat(namep, ".");
strcat(namep, suffixp);
m_namep = namep;
m_identifierp = identifier;
VerilatedImp::scopeInsert(this);
}
@@ -2229,6 +2233,10 @@ void VerilatedScope::scopeDump() const {
}
}
void VerilatedHierarchy::add(VerilatedScope* fromp, VerilatedScope* top) {
VerilatedImp::hierarchyAdd(fromp, top);
}
//===========================================================================
// VerilatedOneThreaded:: Methods