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Support missing sub-assign and and-assign operators 

Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
This commit is contained in:
Kamil Rakoczy 2020-06-25 13:29:06 +02:00
parent f6d06c9f7b
commit 539087f417
2 changed files with 21 additions and 2 deletions
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2
frontends/verilog/verilog_lexer.l
View File

@ -527,7 +527,9 @@ import[ \t\r\n]+\"(DPI|DPI-C)\"[ \t\r\n]+function[ \t\r\n]+ {
".*" { return TOK_WILDCARD_CONNECT; }
"|=" { SV_KEYWORD(TOK_OR_ASSIGN); }
"&=" { SV_KEYWORD(TOK_AND_ASSIGN); }
"+=" { SV_KEYWORD(TOK_PLUS_ASSIGN); }
"-=" { SV_KEYWORD(TOK_SUB_ASSIGN); }
"^=" { SV_KEYWORD(TOK_XOR_ASSIGN); }
[-+]?[=*]> {

21
frontends/verilog/verilog_parser.y
View File

@ -259,7 +259,7 @@ static void rewriteAsMemoryNode(AstNode *node, AstNode *rangeNode)
%token TOK_INTEGER TOK_SIGNED TOK_ASSIGN TOK_PLUS_ASSIGN TOK_ALWAYS TOK_INITIAL
%token TOK_ALWAYS_FF TOK_ALWAYS_COMB TOK_ALWAYS_LATCH
%token TOK_BEGIN TOK_END TOK_IF TOK_ELSE TOK_FOR TOK_WHILE TOK_REPEAT
%token TOK_DPI_FUNCTION TOK_POSEDGE TOK_NEGEDGE TOK_OR TOK_OR_ASSIGN TOK_XOR_ASSIGN TOK_AUTOMATIC
%token TOK_DPI_FUNCTION TOK_POSEDGE TOK_NEGEDGE TOK_OR TOK_AUTOMATIC
%token TOK_CASE TOK_CASEX TOK_CASEZ TOK_ENDCASE TOK_DEFAULT
%token TOK_FUNCTION TOK_ENDFUNCTION TOK_TASK TOK_ENDTASK TOK_SPECIFY
%token TOK_IGNORED_SPECIFY TOK_ENDSPECIFY TOK_SPECPARAM TOK_SPECIFY_AND TOK_IGNORED_SPECIFY_AND
@ -269,7 +269,8 @@ static void rewriteAsMemoryNode(AstNode *node, AstNode *rangeNode)
%token TOK_POS_INDEXED TOK_NEG_INDEXED TOK_PROPERTY TOK_ENUM TOK_TYPEDEF
%token TOK_RAND TOK_CONST TOK_CHECKER TOK_ENDCHECKER TOK_EVENTUALLY
%token TOK_INCREMENT TOK_DECREMENT TOK_UNIQUE TOK_PRIORITY
%token TOK_STRUCT TOK_PACKED TOK_UNSIGNED TOK_INT TOK_BYTE TOK_SHORTINT TOK_UNION
%token TOK_STRUCT TOK_PACKED TOK_UNSIGNED TOK_INT TOK_BYTE TOK_SHORTINT TOK_UNION
%token TOK_OR_ASSIGN TOK_XOR_ASSIGN TOK_AND_ASSIGN TOK_SUB_ASSIGN
%type <ast> range range_or_multirange non_opt_range non_opt_multirange range_or_signed_int
%type <ast> wire_type expr basic_expr concat_list rvalue lvalue lvalue_concat_list
@ -2358,6 +2359,22 @@ simple_behavioral_stmt:
SET_AST_NODE_LOC(add_node, @2, @5);
ast_stack.back()->children.push_back(node);
append_attr(node, $1);
} |
attr lvalue TOK_SUB_ASSIGN delay expr {
AstNode *sub_node = new AstNode(AST_SUB, $2->clone(), $5);
AstNode *node = new AstNode(AST_ASSIGN_EQ, $2, sub_node);
SET_AST_NODE_LOC(node, @2, @5);
SET_AST_NODE_LOC(sub_node, @2, @5);
ast_stack.back()->children.push_back(node);
append_attr(node, $1);
} |
attr lvalue TOK_AND_ASSIGN delay expr {
AstNode *and_node = new AstNode(AST_BIT_AND, $2->clone(), $5);
AstNode *node = new AstNode(AST_ASSIGN_EQ, $2, and_node);
SET_AST_NODE_LOC(node, @2, @5);
SET_AST_NODE_LOC(and_node, @2, @5);
ast_stack.back()->children.push_back(node);
append_attr(node, $1);
};
// this production creates the obligatory if-else shift/reduce conflict