mirror of https://github.com/YosysHQ/yosys.git
1583 lines
42 KiB
Plaintext
1583 lines
42 KiB
Plaintext
/*
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* yosys -- Yosys Open SYnthesis Suite
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*
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* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* ---
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*
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* The Verilog frontend.
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*
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* This frontend is using the AST frontend library (see frontends/ast/).
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* Thus this frontend does not generate RTLIL code directly but creates an
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* AST directly from the Verilog parse tree and then passes this AST to
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* the AST frontend library.
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*
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* ---
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*
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* This is the actual bison parser for Verilog code. The AST ist created directly
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* from the bison reduce functions here. Note that this code uses a few global
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* variables to hold the state of the AST generator and therefore this parser is
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* not reentrant.
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*
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*/
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%{
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#include <list>
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#include <string.h>
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#include "frontends/verilog/verilog_frontend.h"
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#include "kernel/log.h"
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USING_YOSYS_NAMESPACE
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using namespace AST;
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using namespace VERILOG_FRONTEND;
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YOSYS_NAMESPACE_BEGIN
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namespace VERILOG_FRONTEND {
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int port_counter;
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std::map<std::string, int> port_stubs;
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std::map<std::string, AstNode*> attr_list, default_attr_list;
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std::map<std::string, AstNode*> *albuf;
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std::vector<AstNode*> ast_stack;
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struct AstNode *astbuf1, *astbuf2, *astbuf3;
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struct AstNode *current_function_or_task;
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struct AstNode *current_ast, *current_ast_mod;
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int current_function_or_task_port_id;
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std::vector<char> case_type_stack;
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bool do_not_require_port_stubs;
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bool default_nettype_wire;
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bool sv_mode, formal_mode, lib_mode;
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bool norestrict_mode, assume_asserts_mode;
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std::istream *lexin;
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}
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YOSYS_NAMESPACE_END
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static void append_attr(AstNode *ast, std::map<std::string, AstNode*> *al)
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{
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for (auto &it : *al) {
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if (ast->attributes.count(it.first) > 0)
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delete ast->attributes[it.first];
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ast->attributes[it.first] = it.second;
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}
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delete al;
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}
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static void append_attr_clone(AstNode *ast, std::map<std::string, AstNode*> *al)
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{
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for (auto &it : *al) {
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if (ast->attributes.count(it.first) > 0)
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delete ast->attributes[it.first];
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ast->attributes[it.first] = it.second->clone();
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}
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}
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static void free_attr(std::map<std::string, AstNode*> *al)
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{
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for (auto &it : *al)
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delete it.second;
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delete al;
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}
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%}
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%name-prefix "frontend_verilog_yy"
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%union {
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std::string *string;
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struct YOSYS_NAMESPACE_PREFIX AST::AstNode *ast;
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std::map<std::string, YOSYS_NAMESPACE_PREFIX AST::AstNode*> *al;
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bool boolean;
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}
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%token <string> TOK_STRING TOK_ID TOK_CONST TOK_REALVAL TOK_PRIMITIVE
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%token ATTR_BEGIN ATTR_END DEFATTR_BEGIN DEFATTR_END
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%token TOK_MODULE TOK_ENDMODULE TOK_PARAMETER TOK_LOCALPARAM TOK_DEFPARAM
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%token TOK_PACKAGE TOK_ENDPACKAGE TOK_PACKAGESEP
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%token TOK_INPUT TOK_OUTPUT TOK_INOUT TOK_WIRE TOK_REG
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%token TOK_INTEGER TOK_SIGNED TOK_ASSIGN TOK_ALWAYS TOK_INITIAL
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%token TOK_BEGIN TOK_END TOK_IF TOK_ELSE TOK_FOR TOK_WHILE TOK_REPEAT
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%token TOK_DPI_FUNCTION TOK_POSEDGE TOK_NEGEDGE TOK_OR
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%token TOK_CASE TOK_CASEX TOK_CASEZ TOK_ENDCASE TOK_DEFAULT
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%token TOK_FUNCTION TOK_ENDFUNCTION TOK_TASK TOK_ENDTASK
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%token TOK_GENERATE TOK_ENDGENERATE TOK_GENVAR TOK_REAL
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%token TOK_SYNOPSYS_FULL_CASE TOK_SYNOPSYS_PARALLEL_CASE
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%token TOK_SUPPLY0 TOK_SUPPLY1 TOK_TO_SIGNED TOK_TO_UNSIGNED
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%token TOK_POS_INDEXED TOK_NEG_INDEXED TOK_ASSERT TOK_ASSUME
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%token TOK_RESTRICT TOK_PROPERTY
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%type <ast> range range_or_multirange non_opt_range non_opt_multirange range_or_signed_int
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%type <ast> wire_type expr basic_expr concat_list rvalue lvalue lvalue_concat_list
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%type <string> opt_label tok_prim_wrapper hierarchical_id
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%type <boolean> opt_signed
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%type <al> attr
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// operator precedence from low to high
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%left OP_LOR
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%left OP_LAND
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%left '|' OP_NOR
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%left '^' OP_XNOR
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%left '&' OP_NAND
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%left OP_EQ OP_NE OP_EQX OP_NEX
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%left '<' OP_LE OP_GE '>'
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%left OP_SHL OP_SHR OP_SSHL OP_SSHR
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%left '+' '-'
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%left '*' '/' '%'
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%left OP_POW
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%right UNARY_OPS
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%define parse.error verbose
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%define parse.lac full
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%expect 2
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%debug
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%%
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input: {
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ast_stack.clear();
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ast_stack.push_back(current_ast);
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} design {
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ast_stack.pop_back();
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log_assert(GetSize(ast_stack) == 0);
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for (auto &it : default_attr_list)
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delete it.second;
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default_attr_list.clear();
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};
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design:
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module design |
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defattr design |
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task_func_decl design |
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param_decl design |
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localparam_decl design |
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package design |
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/* empty */;
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attr:
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{
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for (auto &it : attr_list)
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delete it.second;
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attr_list.clear();
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for (auto &it : default_attr_list)
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attr_list[it.first] = it.second->clone();
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} attr_opt {
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std::map<std::string, AstNode*> *al = new std::map<std::string, AstNode*>;
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al->swap(attr_list);
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$$ = al;
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};
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attr_opt:
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attr_opt ATTR_BEGIN opt_attr_list ATTR_END |
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/* empty */;
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defattr:
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DEFATTR_BEGIN {
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for (auto &it : default_attr_list)
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delete it.second;
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default_attr_list.clear();
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for (auto &it : attr_list)
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delete it.second;
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attr_list.clear();
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} opt_attr_list {
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default_attr_list = attr_list;
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attr_list.clear();
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} DEFATTR_END;
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opt_attr_list:
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attr_list | /* empty */;
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attr_list:
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attr_assign |
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attr_list ',' attr_assign;
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attr_assign:
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hierarchical_id {
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if (attr_list.count(*$1) != 0)
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delete attr_list[*$1];
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attr_list[*$1] = AstNode::mkconst_int(1, false);
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delete $1;
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} |
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hierarchical_id '=' expr {
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if (attr_list.count(*$1) != 0)
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delete attr_list[*$1];
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attr_list[*$1] = $3;
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delete $1;
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};
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hierarchical_id:
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TOK_ID {
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$$ = $1;
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} |
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hierarchical_id TOK_PACKAGESEP TOK_ID {
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if ($3->substr(0, 1) == "\\")
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*$1 += "::" + $3->substr(1);
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else
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*$1 += "::" + *$3;
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delete $3;
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$$ = $1;
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} |
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hierarchical_id '.' TOK_ID {
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if ($3->substr(0, 1) == "\\")
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*$1 += "." + $3->substr(1);
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else
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*$1 += "." + *$3;
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delete $3;
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$$ = $1;
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};
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module:
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attr TOK_MODULE TOK_ID {
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do_not_require_port_stubs = false;
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AstNode *mod = new AstNode(AST_MODULE);
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ast_stack.back()->children.push_back(mod);
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ast_stack.push_back(mod);
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current_ast_mod = mod;
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port_stubs.clear();
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port_counter = 0;
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mod->str = *$3;
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append_attr(mod, $1);
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delete $3;
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} module_para_opt module_args_opt ';' module_body TOK_ENDMODULE {
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if (port_stubs.size() != 0)
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frontend_verilog_yyerror("Missing details for module port `%s'.",
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port_stubs.begin()->first.c_str());
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ast_stack.pop_back();
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log_assert(ast_stack.size() == 1);
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current_ast_mod = NULL;
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};
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module_para_opt:
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'#' '(' { astbuf1 = nullptr; } module_para_list { if (astbuf1) delete astbuf1; } ')' | /* empty */;
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module_para_list:
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single_module_para | module_para_list ',' single_module_para;
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single_module_para:
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/* empty */ |
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TOK_PARAMETER {
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if (astbuf1) delete astbuf1;
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astbuf1 = new AstNode(AST_PARAMETER);
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astbuf1->children.push_back(AstNode::mkconst_int(0, true));
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} param_signed param_integer param_range single_param_decl | single_param_decl;
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module_args_opt:
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'(' ')' | /* empty */ | '(' module_args optional_comma ')';
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module_args:
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module_arg | module_args ',' module_arg;
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optional_comma:
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',' | /* empty */;
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module_arg_opt_assignment:
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'=' expr {
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if (ast_stack.back()->children.size() > 0 && ast_stack.back()->children.back()->type == AST_WIRE) {
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AstNode *wire = new AstNode(AST_IDENTIFIER);
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wire->str = ast_stack.back()->children.back()->str;
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if (ast_stack.back()->children.back()->is_reg)
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ast_stack.back()->children.push_back(new AstNode(AST_INITIAL, new AstNode(AST_BLOCK, new AstNode(AST_ASSIGN_LE, wire, $2))));
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else
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ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, wire, $2));
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} else
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frontend_verilog_yyerror("Syntax error.");
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} |
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/* empty */;
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module_arg:
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TOK_ID {
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if (ast_stack.back()->children.size() > 0 && ast_stack.back()->children.back()->type == AST_WIRE) {
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AstNode *node = ast_stack.back()->children.back()->clone();
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node->str = *$1;
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node->port_id = ++port_counter;
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ast_stack.back()->children.push_back(node);
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} else {
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if (port_stubs.count(*$1) != 0)
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frontend_verilog_yyerror("Duplicate module port `%s'.", $1->c_str());
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port_stubs[*$1] = ++port_counter;
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}
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delete $1;
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} module_arg_opt_assignment |
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attr wire_type range TOK_ID {
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AstNode *node = $2;
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node->str = *$4;
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node->port_id = ++port_counter;
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if ($3 != NULL)
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node->children.push_back($3);
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if (!node->is_input && !node->is_output)
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frontend_verilog_yyerror("Module port `%s' is neither input nor output.", $4->c_str());
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if (node->is_reg && node->is_input && !node->is_output && !sv_mode)
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frontend_verilog_yyerror("Input port `%s' is declared as register.", $4->c_str());
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ast_stack.back()->children.push_back(node);
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append_attr(node, $1);
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delete $4;
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} module_arg_opt_assignment |
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'.' '.' '.' {
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do_not_require_port_stubs = true;
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};
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package:
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attr TOK_PACKAGE TOK_ID {
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AstNode *mod = new AstNode(AST_PACKAGE);
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ast_stack.back()->children.push_back(mod);
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ast_stack.push_back(mod);
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current_ast_mod = mod;
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mod->str = *$3;
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append_attr(mod, $1);
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} ';' package_body TOK_ENDPACKAGE {
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ast_stack.pop_back();
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current_ast_mod = NULL;
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};
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package_body:
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package_body package_body_stmt |;
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package_body_stmt:
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localparam_decl;
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non_opt_delay:
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'#' '(' expr ')' { delete $3; } |
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'#' '(' expr ':' expr ':' expr ')' { delete $3; delete $5; delete $7; };
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delay:
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non_opt_delay | /* empty */;
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wire_type:
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{
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astbuf3 = new AstNode(AST_WIRE);
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} wire_type_token_list delay {
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$$ = astbuf3;
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};
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wire_type_token_list:
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wire_type_token | wire_type_token_list wire_type_token;
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wire_type_token:
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TOK_INPUT {
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astbuf3->is_input = true;
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} |
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TOK_OUTPUT {
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astbuf3->is_output = true;
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} |
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TOK_INOUT {
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astbuf3->is_input = true;
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astbuf3->is_output = true;
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} |
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TOK_WIRE {
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} |
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TOK_REG {
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astbuf3->is_reg = true;
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} |
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TOK_INTEGER {
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astbuf3->is_reg = true;
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astbuf3->range_left = 31;
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astbuf3->range_right = 0;
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astbuf3->is_signed = true;
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} |
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TOK_GENVAR {
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astbuf3->type = AST_GENVAR;
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astbuf3->is_reg = true;
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astbuf3->range_left = 31;
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astbuf3->range_right = 0;
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} |
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TOK_SIGNED {
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astbuf3->is_signed = true;
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};
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non_opt_range:
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'[' expr ':' expr ']' {
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$$ = new AstNode(AST_RANGE);
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$$->children.push_back($2);
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$$->children.push_back($4);
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} |
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'[' expr TOK_POS_INDEXED expr ']' {
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$$ = new AstNode(AST_RANGE);
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$$->children.push_back(new AstNode(AST_SUB, new AstNode(AST_ADD, $2->clone(), $4), AstNode::mkconst_int(1, true)));
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$$->children.push_back(new AstNode(AST_ADD, $2, AstNode::mkconst_int(0, true)));
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} |
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'[' expr TOK_NEG_INDEXED expr ']' {
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$$ = new AstNode(AST_RANGE);
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$$->children.push_back(new AstNode(AST_ADD, $2, AstNode::mkconst_int(0, true)));
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$$->children.push_back(new AstNode(AST_SUB, new AstNode(AST_ADD, $2->clone(), AstNode::mkconst_int(1, true)), $4));
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} |
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'[' expr ']' {
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$$ = new AstNode(AST_RANGE);
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$$->children.push_back($2);
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};
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non_opt_multirange:
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non_opt_range non_opt_range {
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$$ = new AstNode(AST_MULTIRANGE, $1, $2);
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} |
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non_opt_multirange non_opt_range {
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$$ = $1;
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$$->children.push_back($2);
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};
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range:
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non_opt_range {
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$$ = $1;
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} |
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/* empty */ {
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$$ = NULL;
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};
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range_or_multirange:
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range { $$ = $1; } |
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non_opt_multirange { $$ = $1; };
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range_or_signed_int:
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range {
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$$ = $1;
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} |
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TOK_INTEGER {
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$$ = new AstNode(AST_RANGE);
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$$->children.push_back(AstNode::mkconst_int(31, true));
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$$->children.push_back(AstNode::mkconst_int(0, true));
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$$->is_signed = true;
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};
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module_body:
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module_body module_body_stmt |
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/* the following line makes the generate..endgenrate keywords optional */
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module_body gen_stmt |
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/* empty */;
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module_body_stmt:
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task_func_decl | param_decl | localparam_decl | defparam_decl | wire_decl | assign_stmt | cell_stmt |
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always_stmt | TOK_GENERATE module_gen_body TOK_ENDGENERATE | defattr | assert_property;
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task_func_decl:
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attr TOK_DPI_FUNCTION TOK_ID TOK_ID {
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current_function_or_task = new AstNode(AST_DPI_FUNCTION, AstNode::mkconst_str(*$3), AstNode::mkconst_str(*$4));
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current_function_or_task->str = *$4;
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append_attr(current_function_or_task, $1);
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ast_stack.back()->children.push_back(current_function_or_task);
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delete $3;
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delete $4;
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} opt_dpi_function_args ';' {
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current_function_or_task = NULL;
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} |
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attr TOK_DPI_FUNCTION TOK_ID '=' TOK_ID TOK_ID {
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current_function_or_task = new AstNode(AST_DPI_FUNCTION, AstNode::mkconst_str(*$5), AstNode::mkconst_str(*$3));
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current_function_or_task->str = *$6;
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append_attr(current_function_or_task, $1);
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ast_stack.back()->children.push_back(current_function_or_task);
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delete $3;
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delete $5;
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delete $6;
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} opt_dpi_function_args ';' {
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current_function_or_task = NULL;
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} |
|
|
attr TOK_DPI_FUNCTION TOK_ID ':' TOK_ID '=' TOK_ID TOK_ID {
|
|
current_function_or_task = new AstNode(AST_DPI_FUNCTION, AstNode::mkconst_str(*$7), AstNode::mkconst_str(*$3 + ":" + RTLIL::unescape_id(*$5)));
|
|
current_function_or_task->str = *$8;
|
|
append_attr(current_function_or_task, $1);
|
|
ast_stack.back()->children.push_back(current_function_or_task);
|
|
delete $3;
|
|
delete $5;
|
|
delete $7;
|
|
delete $8;
|
|
} opt_dpi_function_args ';' {
|
|
current_function_or_task = NULL;
|
|
} |
|
|
attr TOK_TASK TOK_ID {
|
|
current_function_or_task = new AstNode(AST_TASK);
|
|
current_function_or_task->str = *$3;
|
|
append_attr(current_function_or_task, $1);
|
|
ast_stack.back()->children.push_back(current_function_or_task);
|
|
ast_stack.push_back(current_function_or_task);
|
|
current_function_or_task_port_id = 1;
|
|
delete $3;
|
|
} task_func_args_opt ';' task_func_body TOK_ENDTASK {
|
|
current_function_or_task = NULL;
|
|
ast_stack.pop_back();
|
|
} |
|
|
attr TOK_FUNCTION opt_signed range_or_signed_int TOK_ID {
|
|
current_function_or_task = new AstNode(AST_FUNCTION);
|
|
current_function_or_task->str = *$5;
|
|
append_attr(current_function_or_task, $1);
|
|
ast_stack.back()->children.push_back(current_function_or_task);
|
|
ast_stack.push_back(current_function_or_task);
|
|
AstNode *outreg = new AstNode(AST_WIRE);
|
|
outreg->str = *$5;
|
|
outreg->is_signed = $3;
|
|
if ($4 != NULL) {
|
|
outreg->children.push_back($4);
|
|
outreg->is_signed = $3 || $4->is_signed;
|
|
$4->is_signed = false;
|
|
}
|
|
current_function_or_task->children.push_back(outreg);
|
|
current_function_or_task_port_id = 1;
|
|
delete $5;
|
|
} task_func_args_opt ';' task_func_body TOK_ENDFUNCTION {
|
|
current_function_or_task = NULL;
|
|
ast_stack.pop_back();
|
|
};
|
|
|
|
dpi_function_arg:
|
|
TOK_ID TOK_ID {
|
|
current_function_or_task->children.push_back(AstNode::mkconst_str(*$1));
|
|
delete $1;
|
|
delete $2;
|
|
} |
|
|
TOK_ID {
|
|
current_function_or_task->children.push_back(AstNode::mkconst_str(*$1));
|
|
delete $1;
|
|
};
|
|
|
|
opt_dpi_function_args:
|
|
'(' dpi_function_args ')' |
|
|
/* empty */;
|
|
|
|
dpi_function_args:
|
|
dpi_function_args ',' dpi_function_arg |
|
|
dpi_function_args ',' |
|
|
dpi_function_arg |
|
|
/* empty */;
|
|
|
|
opt_signed:
|
|
TOK_SIGNED {
|
|
$$ = true;
|
|
} |
|
|
/* empty */ {
|
|
$$ = false;
|
|
};
|
|
|
|
task_func_args_opt:
|
|
'(' ')' | /* empty */ | '(' {
|
|
albuf = nullptr;
|
|
astbuf1 = nullptr;
|
|
astbuf2 = nullptr;
|
|
} task_func_args optional_comma {
|
|
delete astbuf1;
|
|
if (astbuf2 != NULL)
|
|
delete astbuf2;
|
|
free_attr(albuf);
|
|
} ')';
|
|
|
|
task_func_args:
|
|
task_func_port | task_func_args ',' task_func_port;
|
|
|
|
task_func_port:
|
|
attr wire_type range {
|
|
if (albuf) {
|
|
delete astbuf1;
|
|
if (astbuf2 != NULL)
|
|
delete astbuf2;
|
|
free_attr(albuf);
|
|
}
|
|
albuf = $1;
|
|
astbuf1 = $2;
|
|
astbuf2 = $3;
|
|
if (astbuf1->range_left >= 0 && astbuf1->range_right >= 0) {
|
|
if (astbuf2) {
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
} else {
|
|
astbuf2 = new AstNode(AST_RANGE);
|
|
astbuf2->children.push_back(AstNode::mkconst_int(astbuf1->range_left, true));
|
|
astbuf2->children.push_back(AstNode::mkconst_int(astbuf1->range_right, true));
|
|
}
|
|
}
|
|
if (astbuf2 && astbuf2->children.size() != 2)
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
} wire_name | wire_name;
|
|
|
|
task_func_body:
|
|
task_func_body behavioral_stmt |
|
|
/* empty */;
|
|
|
|
param_signed:
|
|
TOK_SIGNED {
|
|
astbuf1->is_signed = true;
|
|
} | /* empty */;
|
|
|
|
param_integer:
|
|
TOK_INTEGER {
|
|
if (astbuf1->children.size() != 1)
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
astbuf1->children.push_back(new AstNode(AST_RANGE));
|
|
astbuf1->children.back()->children.push_back(AstNode::mkconst_int(31, true));
|
|
astbuf1->children.back()->children.push_back(AstNode::mkconst_int(0, true));
|
|
astbuf1->is_signed = true;
|
|
} | /* empty */;
|
|
|
|
param_real:
|
|
TOK_REAL {
|
|
if (astbuf1->children.size() != 1)
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
astbuf1->children.push_back(new AstNode(AST_REALVALUE));
|
|
} | /* empty */;
|
|
|
|
param_range:
|
|
range {
|
|
if ($1 != NULL) {
|
|
if (astbuf1->children.size() != 1)
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
astbuf1->children.push_back($1);
|
|
}
|
|
};
|
|
|
|
param_decl:
|
|
TOK_PARAMETER {
|
|
astbuf1 = new AstNode(AST_PARAMETER);
|
|
astbuf1->children.push_back(AstNode::mkconst_int(0, true));
|
|
} param_signed param_integer param_real param_range param_decl_list ';' {
|
|
delete astbuf1;
|
|
};
|
|
|
|
localparam_decl:
|
|
TOK_LOCALPARAM {
|
|
astbuf1 = new AstNode(AST_LOCALPARAM);
|
|
astbuf1->children.push_back(AstNode::mkconst_int(0, true));
|
|
} param_signed param_integer param_real param_range param_decl_list ';' {
|
|
delete astbuf1;
|
|
};
|
|
|
|
param_decl_list:
|
|
single_param_decl | param_decl_list ',' single_param_decl;
|
|
|
|
single_param_decl:
|
|
TOK_ID '=' expr {
|
|
if (astbuf1 == nullptr)
|
|
frontend_verilog_yyerror("syntax error");
|
|
AstNode *node = astbuf1->clone();
|
|
node->str = *$1;
|
|
delete node->children[0];
|
|
node->children[0] = $3;
|
|
ast_stack.back()->children.push_back(node);
|
|
delete $1;
|
|
};
|
|
|
|
defparam_decl:
|
|
TOK_DEFPARAM defparam_decl_list ';';
|
|
|
|
defparam_decl_list:
|
|
single_defparam_decl | defparam_decl_list ',' single_defparam_decl;
|
|
|
|
single_defparam_decl:
|
|
range rvalue '=' expr {
|
|
AstNode *node = new AstNode(AST_DEFPARAM);
|
|
node->children.push_back($2);
|
|
node->children.push_back($4);
|
|
if ($1 != NULL)
|
|
node->children.push_back($1);
|
|
ast_stack.back()->children.push_back(node);
|
|
};
|
|
|
|
wire_decl:
|
|
attr wire_type range {
|
|
albuf = $1;
|
|
astbuf1 = $2;
|
|
astbuf2 = $3;
|
|
if (astbuf1->range_left >= 0 && astbuf1->range_right >= 0) {
|
|
if (astbuf2) {
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
} else {
|
|
astbuf2 = new AstNode(AST_RANGE);
|
|
astbuf2->children.push_back(AstNode::mkconst_int(astbuf1->range_left, true));
|
|
astbuf2->children.push_back(AstNode::mkconst_int(astbuf1->range_right, true));
|
|
}
|
|
}
|
|
if (astbuf2 && astbuf2->children.size() != 2)
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
} wire_name_list {
|
|
delete astbuf1;
|
|
if (astbuf2 != NULL)
|
|
delete astbuf2;
|
|
free_attr(albuf);
|
|
} ';' |
|
|
attr TOK_SUPPLY0 TOK_ID {
|
|
ast_stack.back()->children.push_back(new AstNode(AST_WIRE));
|
|
ast_stack.back()->children.back()->str = *$3;
|
|
append_attr(ast_stack.back()->children.back(), $1);
|
|
ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, new AstNode(AST_IDENTIFIER), AstNode::mkconst_int(0, false, 1)));
|
|
ast_stack.back()->children.back()->children[0]->str = *$3;
|
|
delete $3;
|
|
} opt_supply_wires ';' |
|
|
attr TOK_SUPPLY1 TOK_ID {
|
|
ast_stack.back()->children.push_back(new AstNode(AST_WIRE));
|
|
ast_stack.back()->children.back()->str = *$3;
|
|
append_attr(ast_stack.back()->children.back(), $1);
|
|
ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, new AstNode(AST_IDENTIFIER), AstNode::mkconst_int(1, false, 1)));
|
|
ast_stack.back()->children.back()->children[0]->str = *$3;
|
|
delete $3;
|
|
} opt_supply_wires ';';
|
|
|
|
opt_supply_wires:
|
|
/* empty */ |
|
|
opt_supply_wires ',' TOK_ID {
|
|
AstNode *wire_node = ast_stack.back()->children.at(GetSize(ast_stack.back()->children)-2)->clone();
|
|
AstNode *assign_node = ast_stack.back()->children.at(GetSize(ast_stack.back()->children)-1)->clone();
|
|
wire_node->str = *$3;
|
|
assign_node->children[0]->str = *$3;
|
|
ast_stack.back()->children.push_back(wire_node);
|
|
ast_stack.back()->children.push_back(assign_node);
|
|
delete $3;
|
|
};
|
|
|
|
wire_name_list:
|
|
wire_name_and_opt_assign | wire_name_list ',' wire_name_and_opt_assign;
|
|
|
|
wire_name_and_opt_assign:
|
|
wire_name |
|
|
wire_name '=' expr {
|
|
AstNode *wire = new AstNode(AST_IDENTIFIER);
|
|
wire->str = ast_stack.back()->children.back()->str;
|
|
if (astbuf1->is_reg)
|
|
ast_stack.back()->children.push_back(new AstNode(AST_INITIAL, new AstNode(AST_BLOCK, new AstNode(AST_ASSIGN_LE, wire, $3))));
|
|
else
|
|
ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, wire, $3));
|
|
};
|
|
|
|
wire_name:
|
|
TOK_ID range_or_multirange {
|
|
if (astbuf1 == nullptr)
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
AstNode *node = astbuf1->clone();
|
|
node->str = *$1;
|
|
append_attr_clone(node, albuf);
|
|
if (astbuf2 != NULL)
|
|
node->children.push_back(astbuf2->clone());
|
|
if ($2 != NULL) {
|
|
if (node->is_input || node->is_output)
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
if (!astbuf2) {
|
|
AstNode *rng = new AstNode(AST_RANGE);
|
|
rng->children.push_back(AstNode::mkconst_int(0, true));
|
|
rng->children.push_back(AstNode::mkconst_int(0, true));
|
|
node->children.push_back(rng);
|
|
}
|
|
node->type = AST_MEMORY;
|
|
node->children.push_back($2);
|
|
}
|
|
if (current_function_or_task == NULL) {
|
|
if (do_not_require_port_stubs && (node->is_input || node->is_output) && port_stubs.count(*$1) == 0) {
|
|
port_stubs[*$1] = ++port_counter;
|
|
}
|
|
if (port_stubs.count(*$1) != 0) {
|
|
if (!node->is_input && !node->is_output)
|
|
frontend_verilog_yyerror("Module port `%s' is neither input nor output.", $1->c_str());
|
|
if (node->is_reg && node->is_input && !node->is_output && !sv_mode)
|
|
frontend_verilog_yyerror("Input port `%s' is declared as register.", $1->c_str());
|
|
node->port_id = port_stubs[*$1];
|
|
port_stubs.erase(*$1);
|
|
} else {
|
|
if (node->is_input || node->is_output)
|
|
frontend_verilog_yyerror("Module port `%s' is not declared in module header.", $1->c_str());
|
|
}
|
|
} else {
|
|
if (node->is_input || node->is_output)
|
|
node->port_id = current_function_or_task_port_id++;
|
|
}
|
|
ast_stack.back()->children.push_back(node);
|
|
delete $1;
|
|
};
|
|
|
|
assign_stmt:
|
|
TOK_ASSIGN delay assign_expr_list ';';
|
|
|
|
assign_expr_list:
|
|
assign_expr | assign_expr_list ',' assign_expr;
|
|
|
|
assign_expr:
|
|
lvalue '=' expr {
|
|
ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, $1, $3));
|
|
};
|
|
|
|
cell_stmt:
|
|
attr TOK_ID {
|
|
astbuf1 = new AstNode(AST_CELL);
|
|
append_attr(astbuf1, $1);
|
|
astbuf1->children.push_back(new AstNode(AST_CELLTYPE));
|
|
astbuf1->children[0]->str = *$2;
|
|
delete $2;
|
|
} cell_parameter_list_opt cell_list ';' {
|
|
delete astbuf1;
|
|
} |
|
|
attr tok_prim_wrapper delay {
|
|
astbuf1 = new AstNode(AST_PRIMITIVE);
|
|
astbuf1->str = *$2;
|
|
append_attr(astbuf1, $1);
|
|
delete $2;
|
|
} prim_list ';' {
|
|
delete astbuf1;
|
|
};
|
|
|
|
tok_prim_wrapper:
|
|
TOK_PRIMITIVE {
|
|
$$ = $1;
|
|
} |
|
|
TOK_OR {
|
|
$$ = new std::string("or");
|
|
};
|
|
|
|
cell_list:
|
|
single_cell |
|
|
cell_list ',' single_cell;
|
|
|
|
single_cell:
|
|
TOK_ID {
|
|
astbuf2 = astbuf1->clone();
|
|
if (astbuf2->type != AST_PRIMITIVE)
|
|
astbuf2->str = *$1;
|
|
delete $1;
|
|
ast_stack.back()->children.push_back(astbuf2);
|
|
} '(' cell_port_list ')' |
|
|
TOK_ID non_opt_range {
|
|
astbuf2 = astbuf1->clone();
|
|
if (astbuf2->type != AST_PRIMITIVE)
|
|
astbuf2->str = *$1;
|
|
delete $1;
|
|
ast_stack.back()->children.push_back(new AstNode(AST_CELLARRAY, $2, astbuf2));
|
|
} '(' cell_port_list ')';
|
|
|
|
prim_list:
|
|
single_prim |
|
|
prim_list ',' single_prim;
|
|
|
|
single_prim:
|
|
single_cell |
|
|
/* no name */ {
|
|
astbuf2 = astbuf1->clone();
|
|
ast_stack.back()->children.push_back(astbuf2);
|
|
} '(' cell_port_list ')';
|
|
|
|
cell_parameter_list_opt:
|
|
'#' '(' cell_parameter_list ')' | /* empty */;
|
|
|
|
cell_parameter_list:
|
|
cell_parameter | cell_parameter_list ',' cell_parameter;
|
|
|
|
cell_parameter:
|
|
/* empty */ |
|
|
expr {
|
|
AstNode *node = new AstNode(AST_PARASET);
|
|
astbuf1->children.push_back(node);
|
|
node->children.push_back($1);
|
|
} |
|
|
'.' TOK_ID '(' expr ')' {
|
|
AstNode *node = new AstNode(AST_PARASET);
|
|
node->str = *$2;
|
|
astbuf1->children.push_back(node);
|
|
node->children.push_back($4);
|
|
delete $2;
|
|
};
|
|
|
|
cell_port_list:
|
|
cell_port_list_rules {
|
|
// remove empty args from end of list
|
|
while (!astbuf2->children.empty()) {
|
|
AstNode *node = astbuf2->children.back();
|
|
if (node->type != AST_ARGUMENT) break;
|
|
if (!node->children.empty()) break;
|
|
if (!node->str.empty()) break;
|
|
astbuf2->children.pop_back();
|
|
delete node;
|
|
}
|
|
|
|
// check port types
|
|
bool has_positional_args = false;
|
|
bool has_named_args = false;
|
|
for (auto node : astbuf2->children) {
|
|
if (node->type != AST_ARGUMENT) continue;
|
|
if (node->str.empty())
|
|
has_positional_args = true;
|
|
else
|
|
has_named_args = true;
|
|
}
|
|
|
|
if (has_positional_args && has_named_args)
|
|
frontend_verilog_yyerror("Mix of positional and named cell ports.");
|
|
};
|
|
|
|
cell_port_list_rules:
|
|
cell_port | cell_port_list_rules ',' cell_port;
|
|
|
|
cell_port:
|
|
/* empty */ {
|
|
AstNode *node = new AstNode(AST_ARGUMENT);
|
|
astbuf2->children.push_back(node);
|
|
} |
|
|
expr {
|
|
AstNode *node = new AstNode(AST_ARGUMENT);
|
|
astbuf2->children.push_back(node);
|
|
node->children.push_back($1);
|
|
} |
|
|
'.' TOK_ID '(' expr ')' {
|
|
AstNode *node = new AstNode(AST_ARGUMENT);
|
|
node->str = *$2;
|
|
astbuf2->children.push_back(node);
|
|
node->children.push_back($4);
|
|
delete $2;
|
|
} |
|
|
'.' TOK_ID '(' ')' {
|
|
AstNode *node = new AstNode(AST_ARGUMENT);
|
|
node->str = *$2;
|
|
astbuf2->children.push_back(node);
|
|
delete $2;
|
|
};
|
|
|
|
always_stmt:
|
|
attr TOK_ALWAYS {
|
|
AstNode *node = new AstNode(AST_ALWAYS);
|
|
append_attr(node, $1);
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
} always_cond {
|
|
AstNode *block = new AstNode(AST_BLOCK);
|
|
ast_stack.back()->children.push_back(block);
|
|
ast_stack.push_back(block);
|
|
} behavioral_stmt {
|
|
ast_stack.pop_back();
|
|
ast_stack.pop_back();
|
|
} |
|
|
attr TOK_INITIAL {
|
|
AstNode *node = new AstNode(AST_INITIAL);
|
|
append_attr(node, $1);
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
AstNode *block = new AstNode(AST_BLOCK);
|
|
ast_stack.back()->children.push_back(block);
|
|
ast_stack.push_back(block);
|
|
} behavioral_stmt {
|
|
ast_stack.pop_back();
|
|
ast_stack.pop_back();
|
|
};
|
|
|
|
always_cond:
|
|
'@' '(' always_events ')' |
|
|
'@' '(' '*' ')' |
|
|
'@' ATTR_BEGIN ')' |
|
|
'@' '(' ATTR_END |
|
|
'@' '*' |
|
|
/* empty */;
|
|
|
|
always_events:
|
|
always_event |
|
|
always_events TOK_OR always_event |
|
|
always_events ',' always_event;
|
|
|
|
always_event:
|
|
TOK_POSEDGE expr {
|
|
AstNode *node = new AstNode(AST_POSEDGE);
|
|
ast_stack.back()->children.push_back(node);
|
|
node->children.push_back($2);
|
|
} |
|
|
TOK_NEGEDGE expr {
|
|
AstNode *node = new AstNode(AST_NEGEDGE);
|
|
ast_stack.back()->children.push_back(node);
|
|
node->children.push_back($2);
|
|
} |
|
|
expr {
|
|
AstNode *node = new AstNode(AST_EDGE);
|
|
ast_stack.back()->children.push_back(node);
|
|
node->children.push_back($1);
|
|
};
|
|
|
|
opt_label:
|
|
':' TOK_ID {
|
|
$$ = $2;
|
|
} |
|
|
/* empty */ {
|
|
$$ = NULL;
|
|
};
|
|
|
|
assert:
|
|
TOK_ASSERT '(' expr ')' ';' {
|
|
ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $3));
|
|
} |
|
|
TOK_ASSUME '(' expr ')' ';' {
|
|
ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $3));
|
|
} |
|
|
TOK_RESTRICT '(' expr ')' ';' {
|
|
if (norestrict_mode)
|
|
delete $3;
|
|
else
|
|
ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $3));
|
|
};
|
|
|
|
assert_property:
|
|
TOK_ASSERT TOK_PROPERTY '(' expr ')' ';' {
|
|
ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $4));
|
|
} |
|
|
TOK_ASSUME TOK_PROPERTY '(' expr ')' ';' {
|
|
ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $4));
|
|
} |
|
|
TOK_RESTRICT TOK_PROPERTY '(' expr ')' ';' {
|
|
if (norestrict_mode)
|
|
delete $4;
|
|
else
|
|
ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $4));
|
|
};
|
|
|
|
simple_behavioral_stmt:
|
|
lvalue '=' delay expr {
|
|
AstNode *node = new AstNode(AST_ASSIGN_EQ, $1, $4);
|
|
ast_stack.back()->children.push_back(node);
|
|
} |
|
|
lvalue OP_LE delay expr {
|
|
AstNode *node = new AstNode(AST_ASSIGN_LE, $1, $4);
|
|
ast_stack.back()->children.push_back(node);
|
|
};
|
|
|
|
// this production creates the obligatory if-else shift/reduce conflict
|
|
behavioral_stmt:
|
|
defattr | assert | wire_decl | param_decl | localparam_decl |
|
|
non_opt_delay behavioral_stmt |
|
|
simple_behavioral_stmt ';' | ';' |
|
|
hierarchical_id attr {
|
|
AstNode *node = new AstNode(AST_TCALL);
|
|
node->str = *$1;
|
|
delete $1;
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
append_attr(node, $2);
|
|
} opt_arg_list ';'{
|
|
ast_stack.pop_back();
|
|
} |
|
|
attr TOK_BEGIN opt_label {
|
|
AstNode *node = new AstNode(AST_BLOCK);
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
append_attr(node, $1);
|
|
if ($3 != NULL)
|
|
node->str = *$3;
|
|
} behavioral_stmt_list TOK_END opt_label {
|
|
if ($3 != NULL && $7 != NULL && *$3 != *$7)
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
if ($3 != NULL)
|
|
delete $3;
|
|
if ($7 != NULL)
|
|
delete $7;
|
|
ast_stack.pop_back();
|
|
} |
|
|
attr TOK_FOR '(' {
|
|
AstNode *node = new AstNode(AST_FOR);
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
append_attr(node, $1);
|
|
} simple_behavioral_stmt ';' expr {
|
|
ast_stack.back()->children.push_back($7);
|
|
} ';' simple_behavioral_stmt ')' {
|
|
AstNode *block = new AstNode(AST_BLOCK);
|
|
ast_stack.back()->children.push_back(block);
|
|
ast_stack.push_back(block);
|
|
} behavioral_stmt {
|
|
ast_stack.pop_back();
|
|
ast_stack.pop_back();
|
|
} |
|
|
attr TOK_WHILE '(' expr ')' {
|
|
AstNode *node = new AstNode(AST_WHILE);
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
append_attr(node, $1);
|
|
AstNode *block = new AstNode(AST_BLOCK);
|
|
ast_stack.back()->children.push_back($4);
|
|
ast_stack.back()->children.push_back(block);
|
|
ast_stack.push_back(block);
|
|
} behavioral_stmt {
|
|
ast_stack.pop_back();
|
|
ast_stack.pop_back();
|
|
} |
|
|
attr TOK_REPEAT '(' expr ')' {
|
|
AstNode *node = new AstNode(AST_REPEAT);
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
append_attr(node, $1);
|
|
AstNode *block = new AstNode(AST_BLOCK);
|
|
ast_stack.back()->children.push_back($4);
|
|
ast_stack.back()->children.push_back(block);
|
|
ast_stack.push_back(block);
|
|
} behavioral_stmt {
|
|
ast_stack.pop_back();
|
|
ast_stack.pop_back();
|
|
} |
|
|
attr TOK_IF '(' expr ')' {
|
|
AstNode *node = new AstNode(AST_CASE);
|
|
AstNode *block = new AstNode(AST_BLOCK);
|
|
AstNode *cond = new AstNode(AST_COND, AstNode::mkconst_int(1, false, 1), block);
|
|
ast_stack.back()->children.push_back(node);
|
|
node->children.push_back(new AstNode(AST_REDUCE_BOOL, $4));
|
|
node->children.push_back(cond);
|
|
ast_stack.push_back(node);
|
|
ast_stack.push_back(block);
|
|
append_attr(node, $1);
|
|
} behavioral_stmt optional_else {
|
|
ast_stack.pop_back();
|
|
ast_stack.pop_back();
|
|
} |
|
|
attr case_type '(' expr ')' {
|
|
AstNode *node = new AstNode(AST_CASE, $4);
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
append_attr(node, $1);
|
|
} opt_synopsys_attr case_body TOK_ENDCASE {
|
|
case_type_stack.pop_back();
|
|
ast_stack.pop_back();
|
|
};
|
|
|
|
case_type:
|
|
TOK_CASE {
|
|
case_type_stack.push_back(0);
|
|
} |
|
|
TOK_CASEX {
|
|
case_type_stack.push_back('x');
|
|
} |
|
|
TOK_CASEZ {
|
|
case_type_stack.push_back('z');
|
|
};
|
|
|
|
opt_synopsys_attr:
|
|
opt_synopsys_attr TOK_SYNOPSYS_FULL_CASE {
|
|
if (ast_stack.back()->attributes.count("\\full_case") == 0)
|
|
ast_stack.back()->attributes["\\full_case"] = AstNode::mkconst_int(1, false);
|
|
} |
|
|
opt_synopsys_attr TOK_SYNOPSYS_PARALLEL_CASE {
|
|
if (ast_stack.back()->attributes.count("\\parallel_case") == 0)
|
|
ast_stack.back()->attributes["\\parallel_case"] = AstNode::mkconst_int(1, false);
|
|
} |
|
|
/* empty */;
|
|
|
|
behavioral_stmt_list:
|
|
behavioral_stmt_list behavioral_stmt |
|
|
/* empty */;
|
|
|
|
optional_else:
|
|
TOK_ELSE {
|
|
AstNode *block = new AstNode(AST_BLOCK);
|
|
AstNode *cond = new AstNode(AST_COND, new AstNode(AST_DEFAULT), block);
|
|
ast_stack.pop_back();
|
|
ast_stack.back()->children.push_back(cond);
|
|
ast_stack.push_back(block);
|
|
} behavioral_stmt |
|
|
/* empty */;
|
|
|
|
case_body:
|
|
case_body case_item |
|
|
/* empty */;
|
|
|
|
case_item:
|
|
{
|
|
AstNode *node = new AstNode(
|
|
case_type_stack.size() && case_type_stack.back() == 'x' ? AST_CONDX :
|
|
case_type_stack.size() && case_type_stack.back() == 'z' ? AST_CONDZ : AST_COND);
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
} case_select {
|
|
AstNode *block = new AstNode(AST_BLOCK);
|
|
ast_stack.back()->children.push_back(block);
|
|
ast_stack.push_back(block);
|
|
case_type_stack.push_back(0);
|
|
} behavioral_stmt {
|
|
case_type_stack.pop_back();
|
|
ast_stack.pop_back();
|
|
ast_stack.pop_back();
|
|
};
|
|
|
|
gen_case_body:
|
|
gen_case_body gen_case_item |
|
|
/* empty */;
|
|
|
|
gen_case_item:
|
|
{
|
|
AstNode *node = new AstNode(
|
|
case_type_stack.size() && case_type_stack.back() == 'x' ? AST_CONDX :
|
|
case_type_stack.size() && case_type_stack.back() == 'z' ? AST_CONDZ : 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;
|
|
|
|
case_expr_list:
|
|
TOK_DEFAULT {
|
|
ast_stack.back()->children.push_back(new AstNode(AST_DEFAULT));
|
|
} |
|
|
expr {
|
|
ast_stack.back()->children.push_back($1);
|
|
} |
|
|
case_expr_list ',' expr {
|
|
ast_stack.back()->children.push_back($3);
|
|
};
|
|
|
|
rvalue:
|
|
hierarchical_id '[' expr ']' '.' rvalue {
|
|
$$ = new AstNode(AST_PREFIX, $3, $6);
|
|
$$->str = *$1;
|
|
delete $1;
|
|
} |
|
|
hierarchical_id range {
|
|
$$ = new AstNode(AST_IDENTIFIER, $2);
|
|
$$->str = *$1;
|
|
delete $1;
|
|
if ($2 == nullptr && formal_mode && ($$->str == "\\$initstate" || $$->str == "\\$anyconst" || $$->str == "\\$anyseq"))
|
|
$$->type = AST_FCALL;
|
|
} |
|
|
hierarchical_id non_opt_multirange {
|
|
$$ = new AstNode(AST_IDENTIFIER, $2);
|
|
$$->str = *$1;
|
|
delete $1;
|
|
};
|
|
|
|
lvalue:
|
|
rvalue {
|
|
$$ = $1;
|
|
} |
|
|
'{' lvalue_concat_list '}' {
|
|
$$ = $2;
|
|
};
|
|
|
|
lvalue_concat_list:
|
|
expr {
|
|
$$ = new AstNode(AST_CONCAT);
|
|
$$->children.push_back($1);
|
|
} |
|
|
expr ',' lvalue_concat_list {
|
|
$$ = $3;
|
|
$$->children.push_back($1);
|
|
};
|
|
|
|
opt_arg_list:
|
|
'(' arg_list optional_comma ')' |
|
|
/* empty */;
|
|
|
|
arg_list:
|
|
arg_list2 |
|
|
/* empty */;
|
|
|
|
arg_list2:
|
|
single_arg |
|
|
arg_list ',' single_arg;
|
|
|
|
single_arg:
|
|
expr {
|
|
ast_stack.back()->children.push_back($1);
|
|
};
|
|
|
|
module_gen_body:
|
|
module_gen_body gen_stmt_or_module_body_stmt |
|
|
/* empty */;
|
|
|
|
gen_stmt_or_module_body_stmt:
|
|
gen_stmt | module_body_stmt;
|
|
|
|
// this production creates the obligatory if-else shift/reduce conflict
|
|
gen_stmt:
|
|
TOK_FOR '(' {
|
|
AstNode *node = new AstNode(AST_GENFOR);
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
} simple_behavioral_stmt ';' expr {
|
|
ast_stack.back()->children.push_back($6);
|
|
} ';' simple_behavioral_stmt ')' gen_stmt_block {
|
|
ast_stack.pop_back();
|
|
} |
|
|
TOK_IF '(' expr ')' {
|
|
AstNode *node = new AstNode(AST_GENIF);
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
ast_stack.back()->children.push_back($3);
|
|
} 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 {
|
|
AstNode *node = new AstNode(AST_GENBLOCK);
|
|
node->str = $2 ? *$2 : std::string();
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
} module_gen_body TOK_END opt_label {
|
|
if ($2 != NULL)
|
|
delete $2;
|
|
if ($6 != NULL)
|
|
delete $6;
|
|
ast_stack.pop_back();
|
|
};
|
|
|
|
gen_stmt_block:
|
|
{
|
|
AstNode *node = new AstNode(AST_GENBLOCK);
|
|
ast_stack.back()->children.push_back(node);
|
|
ast_stack.push_back(node);
|
|
} gen_stmt_or_module_body_stmt {
|
|
ast_stack.pop_back();
|
|
};
|
|
|
|
gen_stmt_or_null:
|
|
gen_stmt_block | ';';
|
|
|
|
opt_gen_else:
|
|
TOK_ELSE gen_stmt_or_null | /* empty */;
|
|
|
|
expr:
|
|
basic_expr {
|
|
$$ = $1;
|
|
} |
|
|
basic_expr '?' attr expr ':' expr {
|
|
$$ = new AstNode(AST_TERNARY);
|
|
$$->children.push_back($1);
|
|
$$->children.push_back($4);
|
|
$$->children.push_back($6);
|
|
append_attr($$, $3);
|
|
};
|
|
|
|
basic_expr:
|
|
rvalue {
|
|
$$ = $1;
|
|
} |
|
|
'(' expr ')' TOK_CONST {
|
|
if ($4->substr(0, 1) != "'")
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
AstNode *bits = $2;
|
|
AstNode *val = const2ast(*$4, case_type_stack.size() == 0 ? 0 : case_type_stack.back(), !lib_mode);
|
|
if (val == NULL)
|
|
log_error("Value conversion failed: `%s'\n", $4->c_str());
|
|
$$ = new AstNode(AST_TO_BITS, bits, val);
|
|
delete $4;
|
|
} |
|
|
hierarchical_id TOK_CONST {
|
|
if ($2->substr(0, 1) != "'")
|
|
frontend_verilog_yyerror("Syntax error.");
|
|
AstNode *bits = new AstNode(AST_IDENTIFIER);
|
|
bits->str = *$1;
|
|
AstNode *val = const2ast(*$2, case_type_stack.size() == 0 ? 0 : case_type_stack.back(), !lib_mode);
|
|
if (val == NULL)
|
|
log_error("Value conversion failed: `%s'\n", $2->c_str());
|
|
$$ = new AstNode(AST_TO_BITS, bits, val);
|
|
delete $1;
|
|
delete $2;
|
|
} |
|
|
TOK_CONST TOK_CONST {
|
|
$$ = const2ast(*$1 + *$2, case_type_stack.size() == 0 ? 0 : case_type_stack.back(), !lib_mode);
|
|
if ($$ == NULL || (*$2)[0] != '\'')
|
|
log_error("Value conversion failed: `%s%s'\n", $1->c_str(), $2->c_str());
|
|
delete $1;
|
|
delete $2;
|
|
} |
|
|
TOK_CONST {
|
|
$$ = const2ast(*$1, case_type_stack.size() == 0 ? 0 : case_type_stack.back(), !lib_mode);
|
|
if ($$ == NULL)
|
|
log_error("Value conversion failed: `%s'\n", $1->c_str());
|
|
delete $1;
|
|
} |
|
|
TOK_REALVAL {
|
|
$$ = new AstNode(AST_REALVALUE);
|
|
char *p = (char*)malloc(GetSize(*$1) + 1), *q;
|
|
for (int i = 0, j = 0; j < GetSize(*$1); j++)
|
|
if ((*$1)[j] != '_')
|
|
p[i++] = (*$1)[j], p[i] = 0;
|
|
$$->realvalue = strtod(p, &q);
|
|
log_assert(*q == 0);
|
|
delete $1;
|
|
free(p);
|
|
} |
|
|
TOK_STRING {
|
|
$$ = AstNode::mkconst_str(*$1);
|
|
delete $1;
|
|
} |
|
|
hierarchical_id attr {
|
|
AstNode *node = new AstNode(AST_FCALL);
|
|
node->str = *$1;
|
|
delete $1;
|
|
ast_stack.push_back(node);
|
|
append_attr(node, $2);
|
|
} '(' arg_list optional_comma ')' {
|
|
$$ = ast_stack.back();
|
|
ast_stack.pop_back();
|
|
} |
|
|
TOK_TO_SIGNED attr '(' expr ')' {
|
|
$$ = new AstNode(AST_TO_SIGNED, $4);
|
|
append_attr($$, $2);
|
|
} |
|
|
TOK_TO_UNSIGNED attr '(' expr ')' {
|
|
$$ = new AstNode(AST_TO_UNSIGNED, $4);
|
|
append_attr($$, $2);
|
|
} |
|
|
'(' expr ')' {
|
|
$$ = $2;
|
|
} |
|
|
'(' expr ':' expr ':' expr ')' {
|
|
delete $2;
|
|
$$ = $4;
|
|
delete $6;
|
|
} |
|
|
'{' concat_list '}' {
|
|
$$ = $2;
|
|
} |
|
|
'{' expr '{' concat_list '}' '}' {
|
|
$$ = new AstNode(AST_REPLICATE, $2, $4);
|
|
} |
|
|
'~' attr basic_expr %prec UNARY_OPS {
|
|
$$ = new AstNode(AST_BIT_NOT, $3);
|
|
append_attr($$, $2);
|
|
} |
|
|
basic_expr '&' attr basic_expr {
|
|
$$ = new AstNode(AST_BIT_AND, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr '|' attr basic_expr {
|
|
$$ = new AstNode(AST_BIT_OR, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr '^' attr basic_expr {
|
|
$$ = new AstNode(AST_BIT_XOR, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_XNOR attr basic_expr {
|
|
$$ = new AstNode(AST_BIT_XNOR, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
'&' attr basic_expr %prec UNARY_OPS {
|
|
$$ = new AstNode(AST_REDUCE_AND, $3);
|
|
append_attr($$, $2);
|
|
} |
|
|
OP_NAND attr basic_expr %prec UNARY_OPS {
|
|
$$ = new AstNode(AST_REDUCE_AND, $3);
|
|
append_attr($$, $2);
|
|
$$ = new AstNode(AST_LOGIC_NOT, $$);
|
|
} |
|
|
'|' attr basic_expr %prec UNARY_OPS {
|
|
$$ = new AstNode(AST_REDUCE_OR, $3);
|
|
append_attr($$, $2);
|
|
} |
|
|
OP_NOR attr basic_expr %prec UNARY_OPS {
|
|
$$ = new AstNode(AST_REDUCE_OR, $3);
|
|
append_attr($$, $2);
|
|
$$ = new AstNode(AST_LOGIC_NOT, $$);
|
|
} |
|
|
'^' attr basic_expr %prec UNARY_OPS {
|
|
$$ = new AstNode(AST_REDUCE_XOR, $3);
|
|
append_attr($$, $2);
|
|
} |
|
|
OP_XNOR attr basic_expr %prec UNARY_OPS {
|
|
$$ = new AstNode(AST_REDUCE_XNOR, $3);
|
|
append_attr($$, $2);
|
|
} |
|
|
basic_expr OP_SHL attr basic_expr {
|
|
$$ = new AstNode(AST_SHIFT_LEFT, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_SHR attr basic_expr {
|
|
$$ = new AstNode(AST_SHIFT_RIGHT, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_SSHL attr basic_expr {
|
|
$$ = new AstNode(AST_SHIFT_SLEFT, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_SSHR attr basic_expr {
|
|
$$ = new AstNode(AST_SHIFT_SRIGHT, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr '<' attr basic_expr {
|
|
$$ = new AstNode(AST_LT, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_LE attr basic_expr {
|
|
$$ = new AstNode(AST_LE, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_EQ attr basic_expr {
|
|
$$ = new AstNode(AST_EQ, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_NE attr basic_expr {
|
|
$$ = new AstNode(AST_NE, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_EQX attr basic_expr {
|
|
$$ = new AstNode(AST_EQX, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_NEX attr basic_expr {
|
|
$$ = new AstNode(AST_NEX, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_GE attr basic_expr {
|
|
$$ = new AstNode(AST_GE, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr '>' attr basic_expr {
|
|
$$ = new AstNode(AST_GT, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr '+' attr basic_expr {
|
|
$$ = new AstNode(AST_ADD, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr '-' attr basic_expr {
|
|
$$ = new AstNode(AST_SUB, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr '*' attr basic_expr {
|
|
$$ = new AstNode(AST_MUL, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr '/' attr basic_expr {
|
|
$$ = new AstNode(AST_DIV, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr '%' attr basic_expr {
|
|
$$ = new AstNode(AST_MOD, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_POW attr basic_expr {
|
|
$$ = new AstNode(AST_POW, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
'+' attr basic_expr %prec UNARY_OPS {
|
|
$$ = new AstNode(AST_POS, $3);
|
|
append_attr($$, $2);
|
|
} |
|
|
'-' attr basic_expr %prec UNARY_OPS {
|
|
$$ = new AstNode(AST_NEG, $3);
|
|
append_attr($$, $2);
|
|
} |
|
|
basic_expr OP_LAND attr basic_expr {
|
|
$$ = new AstNode(AST_LOGIC_AND, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
basic_expr OP_LOR attr basic_expr {
|
|
$$ = new AstNode(AST_LOGIC_OR, $1, $4);
|
|
append_attr($$, $3);
|
|
} |
|
|
'!' attr basic_expr %prec UNARY_OPS {
|
|
$$ = new AstNode(AST_LOGIC_NOT, $3);
|
|
append_attr($$, $2);
|
|
};
|
|
|
|
concat_list:
|
|
expr {
|
|
$$ = new AstNode(AST_CONCAT, $1);
|
|
} |
|
|
expr ',' concat_list {
|
|
$$ = $3;
|
|
$$->children.push_back($1);
|
|
};
|
|
|