diff options
Diffstat (limited to 'kernel/rtlil.cc')
| -rw-r--r-- | kernel/rtlil.cc | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/rtlil.cc b/kernel/rtlil.cc index 8c0b41d09..bf0fd1c89 100644 --- a/kernel/rtlil.cc +++ b/kernel/rtlil.cc @@ -3000,6 +3000,21 @@ bool RTLIL::SigSpec::is_fully_const() const return true; } +bool RTLIL::SigSpec::is_fully_zero() const +{ + cover("kernel.rtlil.sigspec.is_fully_zero"); + + pack(); + for (auto it = chunks_.begin(); it != chunks_.end(); it++) { + if (it->width > 0 && it->wire != NULL) + return false; + for (size_t i = 0; i < it->data.size(); i++) + if (it->data[i] != RTLIL::State::S0) + return false; + } + return true; +} + bool RTLIL::SigSpec::is_fully_def() const { cover("kernel.rtlil.sigspec.is_fully_def"); |