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authorDavid Shah <davey1576@gmail.com>2017-10-20 15:18:39 +0100
committerDavid Shah <davey1576@gmail.com>2017-10-20 15:18:39 +0100
commit42047c61145b5d9e06aca30d706f132f4268dc74 (patch)
treeeaa6cc1eb26934de73467af9e1c7992c6ab422ad /docs
parent4a930377f0a635bcaa28922e8fa6bd0aa8eee6d9 (diff)
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Fix case where make_prim allocates all global buffer pins
This is a low probability bug more likely to show up in low pin count devices with few GBINs. In rare cases make_prim would constrain all of the global buffer capable pins but not the clock input. icecube would then fail to place the clock input. This is fixed by always constraining the clock if all GBIN pins are used.
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