各位大神帮忙来看看,谢谢啦。
小弟菜鸟一枚,做DC综合完之后,提示如下错误,望各位大神帮忙看看是哪块出了问题。
NAME
OPT-1217(error) The register '%s' is not mappedbecause of a lack of
compatible library cells with correct clock/enable phase.
DESCRIPTION
When mapping registers to library cells, the tool triestomatchthe
desiredregister clock phase exactly.When this matching fails due to
a difference in clock phase, the register willbeleftunmappedand
this error message will be issued.
WHAT NEXT
Ifyouwantto allow mapping to a library register with the opposite
clock/enablephase,thenyoucanusethevariablecompile_auto-
matic_clock_phase_inferencetoaltertheway that mapping operates.
Setting this variable to "none" will instruct the tool to ignoreclock
phaseandallowmapping to registers with both positive and negative
clock/enable phase as needed.Setting this variable to "relaxed"will
instructthe tool to only try the opposite phase device if there is no
other way to implement the registerwiththeautomaticallyinferred
phase.And,settingthevariable to "strict" (the default setting)
will instruct the tool to reject all library cells
whose clock/enable phase does notmatchtheautomaticallyinferred
phase.