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Added Verilog/AST support for DPI functions (dpi_call() still unimplemented)

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This commit is contained in:
Clifford Wolf 2014-08-21 12:43:51 +02:00
parent 38addd4c67
commit 7bfc4ae120
8 changed files with 135 additions and 3 deletions
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32
frontends/ast/simplify.cc
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@ -226,7 +226,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
this_wire_scope[node->str] = node;
}
if (node->type == AST_PARAMETER || node->type == AST_LOCALPARAM || node->type == AST_WIRE || node->type == AST_AUTOWIRE || node->type == AST_GENVAR ||
node->type == AST_MEMORY || node->type == AST_FUNCTION || node->type == AST_TASK || node->type == AST_CELL) {
node->type == AST_MEMORY || node->type == AST_FUNCTION || node->type == AST_TASK || node->type == AST_DPI_FUNCTION || node->type == AST_CELL) {
backup_scope[node->str] = current_scope[node->str];
current_scope[node->str] = node;
}
@ -646,7 +646,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
if (current_scope.count(str) == 0) {
for (auto node : current_ast_mod->children) {
if ((node->type == AST_PARAMETER || node->type == AST_LOCALPARAM || node->type == AST_WIRE || node->type == AST_AUTOWIRE || node->type == AST_GENVAR ||
node->type == AST_MEMORY || node->type == AST_FUNCTION || node->type == AST_TASK) && str == node->str) {
node->type == AST_MEMORY || node->type == AST_FUNCTION || node->type == AST_TASK || node->type == AST_DPI_FUNCTION) && str == node->str) {
current_scope[node->str] = node;
break;
}
@ -1442,6 +1442,34 @@ skip_dynamic_range_lvalue_expansion:;
goto apply_newNode;
}
if (current_scope.count(str) != 0 && current_scope[str]->type == AST_DPI_FUNCTION)
{
AstNode *dpi_decl = current_scope[str];
std::string rtype, fname;
std::vector<std::string> argtypes;
std::vector<AstNode*> args;
rtype = RTLIL::unescape_id(dpi_decl->children.at(0)->str);
fname = RTLIL::unescape_id(dpi_decl->str);
for (int i = 1; i < SIZE(dpi_decl->children); i++)
{
if (i-1 >= SIZE(children))
log_error("Insufficient number of arguments in DPI function call at %s:%d.\n", filename.c_str(), linenum);
argtypes.push_back(RTLIL::unescape_id(dpi_decl->children.at(i)->str));
args.push_back(children.at(i-1)->clone());
while (args.back()->simplify(true, false, false, stage, -1, false, true)) { }
if (args.back()->type != AST_CONSTANT && args.back()->type != AST_REALVALUE)
log_error("Failed to evaluate DPI function with non-constant argument at %s:%d.\n", filename.c_str(), linenum);
}
newNode = dpi_call(rtype, fname, argtypes, args);
goto apply_newNode;
}
if (current_scope.count(str) == 0 || current_scope[str]->type != AST_FUNCTION)
log_error("Can't resolve function name `%s' at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
}