FF/Latch <idex_signimm_8> (without init value) has a constant value of 0 in block

Discussion in 'VHDL' started by Spacebottle, May 24, 2011.

  1. Spacebottle

    Spacebottle

    Joined:
    May 24, 2011
    Messages:
    2
    HTE WARINGS like these:
    WARNING:Xst:1710 - FF/Latch <idex_signimm_8> (without init value) has a constant value of 0 in block <mips/stage_ex>.
    WARNING:Xst:1710 - FF/Latch <idex_signimm_7> (without init value) has a constant value of 0 in block <mips/stage_ex>.
    WARNING:Xst:1710 - FF/Latch <idex_signimm_6> (without init value) has a constant value of 0 in block <mips/stage_ex>.
    WARNING:Xst:1710 - FF/Latch <idex_signimm_5> (without init value) has a constant value of 0 in block <mips/stage_ex>.
    WARNING:Xst:1710 - FF/Latch <idex_signimm_4> (without init value) has a constant value of 0 in block <mips/stage_ex>.
    WARNING:Xst:1710 - FF/Latch <idex_signimm_3> (without init value) has a constant value of 0 in block <mips/stage_ex>.
    WARNING:Xst:1710 - FF/Latch <idex_signimm_2> (without init value) has a constant value of 0 in block <mips/stage_ex>.
    WARNING:Xst:1710 - FF/Latch <idex_signimm_1> (without init value) has a constant value of 0 in block <mips/stage_ex>.
    WARNING:Xst:1710 - FF/Latch <idex_signimm_0> (without init value) has a constant value of 0 in block <mips/stage_ex>.


    could someone tell what's the matter of them?
    Spacebottle, May 24, 2011
    #1
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  2. Spacebottle

    joris

    Joined:
    Jan 29, 2009
    Messages:
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    I think it's simply saying that the synthesizer found out that, that particular variable/signal idex_signimm, the mentioned bits (8-0) can only have a value of 0 because of the code.
    If this is truly unexpected there may be a bug in your code.
    joris, May 24, 2011
    #2
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