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command to list only the flops in the design

ssuhas

Hi,

Can anyone let me know how do we list only the flops in the design using encounter.

And also In case I want to list the buffers , Inverters etc. How do we do so?

 Thanks

  • Here is a procedure you can try:

    Usage:

    findFlop * => To list all flops

    findFlop *a/b/c*reg* => To serach for specific flop pattern

     proc findFlop {flopPattern} {

        set flopList {}

        foreach instPtr [dbGet top.insts] {
            set cellPtr [dbInstCell $instPtr]
            if {[dbIsCellStdCell $cellPtr] && [dbIsCellSequential $cellPtr] && ![dbIsCellLatch $cellPtr] && \
                    ![isCellClockGating $cellPtr] && [string match $flopPattern $cellPtr]} {
                lappend flopList [dbInstName $instPtr]
            }
        }
        return $flopList
    }

    # Procedure to find buffers in the design
    proc findBuffer {bufPattern} {

        set bufList {}

        foreach instPtr [dbGet top.insts] {
            set cellPtr [dbInstCell $instPtr]
            if {[dbIsCellStdCell [dbInstCell $instPtr]] && [dbIsCellBuffer $cellPtr] && [string match $bufPattern $cellPtr]} {
                lappend bufList [dbInstName $instPtr]
            }
        }
        return $bufList
    }

    # Procedure to find inverters in the design
    proc findInverter {invPattern} {

        set invList {}

        foreach instPtr [dbGet top.insts] {
            set cellPtr [dbInstCell $instPtr]
            if {[dbIsCellStdCell [dbInstCell $instPtr]] && [dbIsCellInverter $cellPtr] && [string match $invPattern $cellPtr]} {
                lappend invList [dbInstName $instPtr]
            }
        }
        return $invList
    }

    Thanks

    Khandaker

     

     

  • Fixed the bug .. here are the updated procedures:

    # Procedure to find flops in the design
    proc findFlop {flopPattern} {
       
        set flopList {}

        foreach instPtr [dbGet top.insts] {
     set cellPtr [dbInstCell $instPtr]
     if {[dbIsCellStdCell $cellPtr] && [dbIsCellSequential $cellPtr] && ![dbIsCellLatch $cellPtr] && \
      ![isCellClockGating $cellPtr] && [string match $flopPattern [dbInstName $instPtr]]} {
         lappend flopList [dbInstName $instPtr]
     }
        }
        return $flopList
    }

    # Procedure to find buffers in the design
    proc findBuffer {bufPattern} {
       
        set bufList {}

        foreach instPtr [dbGet top.insts] {
     set cellPtr [dbInstCell $instPtr]
     if {[dbIsCellStdCell [dbInstCell $instPtr]] && [dbIsCellBuffer $cellPtr] && [string match $bufPattern [dbInstName $instPtr]]} {
         lappend bufList [dbInstName $instPtr]
     }
        }
        return $bufList
    }

    # Procedure to find inverters in the design
    proc findInverter {invPattern} {
       
        set invList {}

        foreach instPtr [dbGet top.insts] {
     set cellPtr [dbInstCell $instPtr]
     if {[dbIsCellStdCell [dbInstCell $instPtr]] && [dbIsCellInverter $cellPtr] && [string match $invPattern [dbInstName $instPtr]]} {
         lappend invList [dbInstName $instPtr]
     }
        }
        return $invList
    }

  • Fixed the bug .. here are the updated procedures:

    # Procedure to find flops in the design
    proc findFlop {flopPattern} {
       
        set flopList {}

        foreach instPtr [dbGet top.insts] {
     set cellPtr [dbInstCell $instPtr]
     if {[dbIsCellStdCell $cellPtr] && [dbIsCellSequential $cellPtr] && ![dbIsCellLatch $cellPtr] && \
      ![isCellClockGating $cellPtr] && [string match $flopPattern [dbInstName $instPtr]]} {
         lappend flopList [dbInstName $instPtr]
     }
        }
        return $flopList
    }

    # Procedure to find buffers in the design
    proc findBuffer {bufPattern} {
       
        set bufList {}

        foreach instPtr [dbGet top.insts] {
     set cellPtr [dbInstCell $instPtr]
     if {[dbIsCellStdCell [dbInstCell $instPtr]] && [dbIsCellBuffer $cellPtr] && [string match $bufPattern [dbInstName $instPtr]]} {
         lappend bufList [dbInstName $instPtr]
     }
        }
        return $bufList
    }

    # Procedure to find inverters in the design
    proc findInverter {invPattern} {
       
        set invList {}

        foreach instPtr [dbGet top.insts] {
     set cellPtr [dbInstCell $instPtr]
     if {[dbIsCellStdCell [dbInstCell $instPtr]] && [dbIsCellInverter $cellPtr] && [string match $invPattern [dbInstName $instPtr]]} {
         lappend invList [dbInstName $instPtr]
     }
        }
        return $invList
    }

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