read_ilang: allow slicing sigspecs.

diff --git a/frontends/ilang/ilang_parser.y b/frontends/ilang/ilang_parser.y
index bfc062fec0f4fa0466edc89dbe42f1d9ade8da25..b957ecd9656f1f49f4376ff4bd7fc5bc95ad26b5 100644 (file)
--- a/frontends/ilang/ilang_parser.y
+++ b/frontends/ilang/ilang_parser.y
@@ -387,17 +387,13 @@ sigspec:
                $$ = new RTLIL::SigSpec(current_module->wires_[$1]);
                free($1);
        } |
-       TOK_ID '[' TOK_INT ']' {
-               if (current_module->wires_.count($1) == 0)
-                       rtlil_frontend_ilang_yyerror(stringf("ilang error: wire %s not found", $1).c_str());
-               $$ = new RTLIL::SigSpec(current_module->wires_[$1], $3);
-               free($1);
+       sigspec '[' TOK_INT ']' {
+               $$ = new RTLIL::SigSpec($1->extract($3));
+               delete $1;
        } |
-       TOK_ID '[' TOK_INT ':' TOK_INT ']' {
-               if (current_module->wires_.count($1) == 0)
-                       rtlil_frontend_ilang_yyerror(stringf("ilang error: wire %s not found", $1).c_str());
-               $$ = new RTLIL::SigSpec(current_module->wires_[$1], $5, $3 - $5 + 1);
-               free($1);
+       sigspec '[' TOK_INT ':' TOK_INT ']' {
+               $$ = new RTLIL::SigSpec($1->extract($5, $3 - $5 + 1));
+               delete $1;
        } |
        '{' sigspec_list '}' {
                $$ = $2;