Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6368>
"\n" yylineno++;
[ \t] ; /* ignore whitespace */
";"[^\n]*"\n" yylineno++; /* ignore comments */
"\n" yylineno++;
[ \t] ; /* ignore whitespace */
";"[^\n]*"\n" yylineno++; /* ignore comments */
-[1-9][0-9]* yylval.num = strtoul(yytext, NULL, 0); return T_INT;
+0|[1-9][0-9]* yylval.num = strtoul(yytext, NULL, 0); return T_INT;
"0x"[0-9a-fA-F]* yylval.num = strtoul(yytext, NULL, 0); return T_HEX;
"$"[0-9a-fA-F][0-9a-fA-F] yylval.num = parse_reg(yytext); return T_REGISTER;
"0x"[0-9a-fA-F]* yylval.num = strtoul(yytext, NULL, 0); return T_HEX;
"$"[0-9a-fA-F][0-9a-fA-F] yylval.num = parse_reg(yytext); return T_REGISTER;