zhao第三章硬件描述语言.ppt

* if_statement ::= [ if_label : ] if condition then sequence_of_statements { elsif condition then sequence_of_statements } [ else sequence_of_statements ] end if [ if_label ] ; * if_statement ::= [ if_label : ] if condition then sequence_of_statements { elsif condition then sequence_of_statements } [ else sequence_of_statements ] end if [ if_label ] ; * if_statement ::= [ if_label : ] if condition then sequence_of_statements { elsif condition then sequence_of_statements } [ else sequence_of_statements ] end if [ if_label ] ; * if_statement ::= [ if_label : ] if condition then sequence_of_statements { elsif condition then sequence_of_statements } [ else sequence_of_statements ] end if [ if_label ] ; * if_statement ::= [ if_label : ] if condition then sequence_of_statements { elsif condition then sequence_of_statements } [ else sequence_of_statements ] end if [ if_label ] ; * if_statement ::= [ if_label : ] if condition then sequence_of_statements { elsif condition then sequence_of_statements } [ else sequence_of_statements ] end if [ if_label ] ; * if_statement ::= [ if_label : ] if condition then sequence_of_statements { elsif condition then sequence_of_statements } [ else sequence_of_statements ] end if [ if_label ] ; * if_statement ::= [ if_label : ] if condition then sequence_of_statements { elsif condition then sequence_of_statements } [ else sequence_of_statements ] end if [ if_label ] ; * if_statement ::= [ if_label : ] if condition then sequence_of_statements { elsif condition then sequence_of_statements } [ else sequence_of_statements ] end if [ if_label ] ; * * case_statement ::= [ case_label : ] case expression is case_statement_alternative { case_statement_alternative } end case [ case_label ] ; case_statement_alternative ::= when choices = sequence_of_statements * case_statement ::= [ case_label : ] case expression is case_statement_alternative { case_statement_alternative } end case [ case_label ] ; case_statement_alternative ::= when choices = sequen