PlaceTop

Name

PlaceTop - Places an instance at the top of the "reference instance"

Synopsys

PlaceTop ( ins, sym, offsetX, offsetY )

Description

Placement of an instance.
The instance has to be instantiated in the method Netlist in order to use the PlaceTop function.

The bottom left corner of the abutment box of the instance is placed, after beeing symetrized and/or rotated, toward the top left corner of the abutment box of the "reference instance". The newly placed instance becomes the "reference instance".

Parameters

• ins : Instance to place.
• sym : Geometrical operation to be performed on the instance before beeing placed.
  The sym argument can take eight legal values :
  • NOSYM : no geometrical operation is performed
  • SYM_Y : Y becomes -Y, that means toward X axe symetry
  • SYM_X : X becomes -X, that means toward Y axe symetry
  • SYMXY : X becomes -X, Y becomes -Y
  • ROT_P : a positive 90 degrees rotation takes place
  • ROT_M : a negative 90 degrees rotation takes place
  • SY_RP : Y becomes -Y, and then a positive 90 degrees rotation takes place
  • SY_RM : Y becomes -Y, and then a negative 90 degrees rotation takes place
• offsetX (optionnal) : An offset is put horizontally. The value given as argument must be a multiple of PITCH
• offsetY (optionnal) : An offset is put vertically. The value given as argument must be a multiple of SLICE

Example

Place    ( myInst1, NOSYM, 0, 0 )
PlaceTop ( myInst2, SYM_Y )

Errors

Some errors may occur :

• [Stratus ERROR] Placement : the instance doesn't exist.
  The instance must be instanciated in order to be placed.
• [Stratus ERROR] Placement : the first argument is not an instance.
• [Stratus ERROR] Placement : the instance is already placed.
  One can not place an instance twice
• [Stratus ERROR] PlaceTop : no previous instance.
  One can use PlaceTop only if a reference instance exist. Use a Place call before.
• [Stratus ERROR] PlaceTop : wrong argument for placement type.
  The symetry given as argument is not correct.

See Also

Introduction Place PlaceBottom PlaceRight PlaceLeft SetRefIns DefAb ResizeAb