The following table shows which families support this constraint and which file formats and tools you can use to enter or modify it:
|
Families |
PDC |
GCF |
|
Fusion |
X |
|
|
ProASIC3E |
X |
|
|
ProASIC3 |
X |
|
|
ProASIC PLUS |
|
X |
|
Axcelerator |
|
|
|
ProASIC |
|
X |
|
eX |
|
|
|
SX-A |
|
|
|
SX |
|
|
|
MX |
|
|
|
3200DX |
|
|
|
ACT3 |
|
|
|
ACT2/1200XL |
|
|
|
ACT1 |
|
|
Use this constraint to undo the operation of a previously specified delete_buffer_tree command. This constraint is useful in the import and merge flow when users want to keep the previous database constraint but want to overwrite just one delete_buffer_tree command.
You can use one or more of the following commands or GUI tools to restore a buffer tree:
PDC - dont_touch_buffer_tree
GCF - dont_optimize