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Using $pmux info in fsm_extract to optimize transition ctrl_in patterns

This commit is contained in:
Clifford Wolf 2014-08-30 14:34:49 +02:00
parent ab019b0bd5
commit f910481f35
1 changed files with 10 additions and 0 deletions
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10
passes/fsm/fsm_extract.cc
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@ -144,6 +144,16 @@ undef_bit_in_next_state:
tr.ctrl_in = sig2const(ce, ctrl_in, RTLIL::State::Sa, dont_care);
tr.ctrl_out = sig2const(ce, ctrl_out, RTLIL::State::Sx);
std::map<RTLIL::SigBit, int> ctrl_in_bit_indices;
for (int i = 0; i < SIZE(ctrl_in); i++)
ctrl_in_bit_indices[ctrl_in[i]] = i;
for (auto &it : ctrl_in_bit_indices)
if (tr.ctrl_in.bits.at(it.second) == RTLIL::S1 && exclusive_ctrls.count(it.first) != 0)
for (auto &dc_bit : exclusive_ctrls.at(it.first))
if (ctrl_in_bit_indices.count(dc_bit))
tr.ctrl_in.bits.at(ctrl_in_bit_indices.at(dc_bit)) = RTLIL::State::Sa;
RTLIL::Const log_state_in = RTLIL::Const(RTLIL::State::Sx, fsm_data.state_bits);
if (state_in >= 0)
log_state_in = fsm_data.state_table.at(state_in);