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| author | Clifford Wolf <clifford@clifford.at> | 2014-08-08 14:55:11 +0200 |
|---|---|---|
| committer | Clifford Wolf <clifford@clifford.at> | 2014-08-08 14:56:04 +0200 |
| commit | 58ac605470aed3b2a537b4f99ac17a199f8b5233 (patch) | |
| tree | 5357c379e22153e23cc5ec4aa418127e6720de7e | |
| parent | 7067c43ec09cca176ad72378aa9ad868171c2471 (diff) | |
Another fsm_extract bugfix
| -rw-r--r-- | passes/fsm/fsm_extract.cc | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/passes/fsm/fsm_extract.cc b/passes/fsm/fsm_extract.cc index 7533b4a3..ebe3073d 100644 --- a/passes/fsm/fsm_extract.cc +++ b/passes/fsm/fsm_extract.cc @@ -231,6 +231,10 @@ static void extract_fsm(RTLIL::Wire *wire) log(" fsm extraction failed: state selection tree is not closed.\n"); return; } + if (SIZE(states) <= 1) { + log(" fsm extraction failed: at least two states are required.\n"); + return; + } // find control outputs // (add the state signals to the list of control outputs. if everything goes right, this signals |