IC Complier Placement and Optimization Attributes

Attribute	Coarse placement	Detail placement	Optimization
is_fixed	Cannot move cells	Cannot move cells	Cannot move, rotate, or resize cells
cts_fixed (imposed on clock buffers by clock tree synthesis)	Cannot move cells	Cannot move cells	Cannot move, rotate, or resize cells
is_soft_fixed	Cannot move cells	No restrictions	No restrictions
size_only	No restrictions	No restrictions	Can only resize cells
in_place_size_only	Cannot move cells	No restrictions	Can only resize cells if there is room
dont_touch	No restrictions	No restrictions	Cannot move, rotate, or resize cells

Attribute	Coarse placement	Detail placement	Optimization
is_fixed	Cannot move cells	Cannot move cells	Cannot move, rotate, or resize cells
cts_fixed (imposed on clock buffers by clock tree synthesis)	Cannot move cells	Cannot move cells	Cannot move, rotate, or resize cells
is_soft_fixed	Cannot move cells	No restrictions	No restrictions
size_only	No restrictions	No restrictions	Can only resize cells
in_place_size_only	Cannot move cells	No restrictions	Can only resize cells if there is room
dont_touch	No restrictions	No restrictions	Cannot move, rotate, or resize cells

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