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Various improvements in support for generate statements

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This commit is contained in:
Clifford Wolf 2013-12-04 21:06:54 +01:00
parent f4b46ed31e
commit 4a4a3fc337
7 changed files with 161 additions and 7 deletions
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44
frontends/verilog/parser.y
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@ -887,6 +887,22 @@ case_item:
ast_stack.pop_back();
};
gen_case_body:
gen_case_body gen_case_item |
/* empty */;
gen_case_item:
{
AstNode *node = new AstNode(AST_COND);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} case_select {
case_type_stack.push_back(0);
} gen_stmt_or_null {
case_type_stack.pop_back();
ast_stack.pop_back();
};
case_select:
case_expr_list ':' |
TOK_DEFAULT;
@ -956,7 +972,6 @@ single_arg:
module_gen_body:
module_gen_body gen_stmt |
module_gen_body module_body_stmt |
/* empty */;
// this production creates the obligatory if-else shift/reduce conflict
@ -967,7 +982,7 @@ gen_stmt:
ast_stack.push_back(node);
} simple_behavioral_stmt ';' expr {
ast_stack.back()->children.push_back($6);
} ';' simple_behavioral_stmt ')' gen_stmt {
} ';' simple_behavioral_stmt ')' gen_stmt_block {
ast_stack.pop_back();
} |
TOK_IF '(' expr ')' {
@ -975,7 +990,15 @@ gen_stmt:
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
ast_stack.back()->children.push_back($3);
} gen_stmt opt_gen_else {
} gen_stmt_block opt_gen_else {
ast_stack.pop_back();
} |
case_type '(' expr ')' {
AstNode *node = new AstNode(AST_GENCASE, $3);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} gen_case_body TOK_ENDCASE {
case_type_stack.pop_back();
ast_stack.pop_back();
} |
TOK_BEGIN opt_label {
@ -989,10 +1012,23 @@ gen_stmt:
if ($6 != NULL)
delete $6;
ast_stack.pop_back();
} |
module_body_stmt;
gen_stmt_block:
{
AstNode *node = new AstNode(AST_GENBLOCK);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} gen_stmt {
ast_stack.pop_back();
};
gen_stmt_or_null:
gen_stmt_block | ';';
opt_gen_else:
TOK_ELSE gen_stmt | /* empty */;
TOK_ELSE gen_stmt_or_null | /* empty */;
expr:
basic_expr {