综合后出现的警告！！！

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综合后出现的警告！！！ [复制链接]

WARNING:Xst:37 - Detected unknown constraint/property "BLACK_BOX". This constraint/property is not supported by the current software release and will be ignored.
WARNING:Xst:1814 - Core does not contain any logic.
WARNING:Xst:2036 - Inserting OBUF on port > driven by black box . Possible simulation mismatch.
WARNING:Xst:2036 - Inserting OBUF on port > driven by black box . Possible simulation mismatch.
WARNING:Xst:2036 - Inserting OBUF on port > driven by black box . Possible simulation mismatch.
WARNING:Xst:2036 - Inserting OBUF on port > driven by black box . Possible simulation mismatch.
WARNING:Xst:2036 - Inserting OBUF on port > driven by black box . Possible simulation mismatch.
WARNING:Xst:2036 - Inserting OBUF on port > driven by black box . Possible simulation mismatch.
WARNING:Xst:2036 - Inserting OBUF on port > driven by black box . Possible simulation mismatch.
WARNING:Xst:2036 - Inserting OBUF on port > driven by black box . Possible simulation mismatch.
WARNING:Xst:616 - Invalid property "BLACK_BOX 1": Did not attach to sqrt_1.