Support missing xor-assign operator

Signed-off-by: Lukasz Dalek <ldalek@antmicro.com>

diff --git a/frontends/verilog/verilog_lexer.l b/frontends/verilog/verilog_lexer.l
index c77da4274362271458dd0688b429a10530320a7d..8c9f403a3542abc0a89d0b18390d81928b0b6040 100644 (file)
--- a/frontends/verilog/verilog_lexer.l
+++ b/frontends/verilog/verilog_lexer.l
@@ -528,6 +528,7 @@ import[ \t\r\n]+\"(DPI|DPI-C)\"[ \t\r\n]+function[ \t\r\n]+ {
 
 "|=" { SV_KEYWORD(TOK_OR_ASSIGN); }
 "+=" { SV_KEYWORD(TOK_PLUS_ASSIGN); }
+"^=" { SV_KEYWORD(TOK_XOR_ASSIGN); }
 
 [-+]?[=*]> {
        if (!specify_mode) REJECT;

diff --git a/frontends/verilog/verilog_parser.y b/frontends/verilog/verilog_parser.y
index e8b74cf83cb2f76806268457ef88591530a83485..4c2a788096012df75f12126f932e5a9df0d4a43d 100644 (file)
--- a/frontends/verilog/verilog_parser.y
+++ b/frontends/verilog/verilog_parser.y
@@ -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_AUTOMATIC
+%token TOK_DPI_FUNCTION TOK_POSEDGE TOK_NEGEDGE TOK_OR TOK_OR_ASSIGN TOK_XOR_ASSIGN 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
@@ -2335,6 +2335,14 @@ simple_behavioral_stmt:
                SET_AST_NODE_LOC(node, @2, @5);
                append_attr(node, $1);
        } |
+       attr lvalue TOK_XOR_ASSIGN delay expr {
+               AstNode *xor_node = new AstNode(AST_BIT_XOR, $2->clone(), $5);
+               AstNode *node = new AstNode(AST_ASSIGN_EQ, $2, xor_node);
+               SET_AST_NODE_LOC(xor_node, @2, @5);
+               SET_AST_NODE_LOC(node, @2, @5);
+               ast_stack.back()->children.push_back(node);
+               append_attr(node, $1);
+       } |
        attr lvalue TOK_OR_ASSIGN delay expr {
                AstNode *or_node = new AstNode(AST_BIT_OR, $2->clone(), $5);
                SET_AST_NODE_LOC(or_node, @2, @5);