How Can I Get the Max. Length of all wires on a design ?

Hi Kenjung,

If you have access to Ravel Standard Library, please use the following code:

(include "standard/basic")

(define longest_wire

        (transform (w)

               (CHOOSE_MAX wire length)

        (w (length w))))

if you do not have the standard library files, please use the following macro:

(macro CHOOSE_MAX (Object Measure)
    "CHOOSE_MAX [object] function/measurement => [object]

 Find the object for which the measurement is smallest. If the objects
 themselves are the values to be compared, IDENTITY can be given as
 the measurement function."
      (CHOOSE Object greaterp Measure))

Thanks,

Bindu

Hi, Bindu :

Thanks for your reply, but I can't find any standard library path including "standard/basic" .
Can you tell me the absolute path (in APD 16.6) of the standard library path ?
And, is there any manual about these functions such as <CHOOSE_MAX> or <CHOOSE> .

Further more, I can't understand too, the following instruction.
Is this means I can define a macro named "CHOOSE_MAX" myself?
But I don't see any code or method here.
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if you do not have the standard library files, please use the following macro:

(macro CHOOSE_MAX (Object Measure)
    "CHOOSE_MAX [object] function/measurement => [object]

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Hi Kenjung,

Sorry, CHOOSE_MAX macro calls some other macros that I did not share.

Please use the following code to find the longest wire in the design:

(macro CHOOSE_MAX_LENGTH (Object Measure)
       (difference Object
            (transform (o1 o2)
                (select (o1 o2) (combine Object Object)
                    ((length o1) > (length o2)))
            (o2))))

(define longest_wire
   (transform (w)
        (CHOOSE_MAX_LENGTH wire length)
   (w (length w))))

The macro finds the shorter of two wires and subtracts it from the relation containing all the wires. When done in iteration, this leaves us the wire with maximum length.

The same macro can be altered to pick the wire with shortest length. You only have to change this line in the macro to find the shorter of two wires:

 ((length o1) < (length o2))

Thanks,

Bindu