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Extend "delay" expressions to handle pair and triplet, i.e. rise, fall and turn-off (#2566)

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TimRudy 2021-02-24 15:48:15 -05:00 • committed by GitHub
parent fffbf651df
commit dcd9f0af23
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3 changed files with 445 additions and 2 deletions
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9
frontends/verilog/verilog_parser.y
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@ -609,12 +609,17 @@ interface_body_stmt:
param_decl | localparam_decl | typedef_decl | defparam_decl | wire_decl | always_stmt | assign_stmt |
modport_stmt;
mintypmax_expr:
expr { delete $1; } |
expr ':' expr ':' expr { delete $1; delete $3; delete $5; };
non_opt_delay:
'#' TOK_ID { delete $2; } |
'#' TOK_CONSTVAL { delete $2; } |
'#' TOK_REALVAL { delete $2; } |
'#' '(' expr ')' { delete $3; } |
'#' '(' expr ':' expr ':' expr ')' { delete $3; delete $5; delete $7; };
'#' '(' mintypmax_expr ')' |
'#' '(' mintypmax_expr ',' mintypmax_expr ')' |
'#' '(' mintypmax_expr ',' mintypmax_expr ',' mintypmax_expr ')';
delay:
non_opt_delay | %empty;