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Add Const methods is_fully_zero(), is_fully_def(), and is_fully_undef()

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This commit is contained in:
Clifford Wolf 2017-08-18 11:40:08 +02:00
parent 0be738eaac
commit 4ba5bd12c6
2 changed files with 37 additions and 0 deletions
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33
kernel/rtlil.cc
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@ -161,6 +161,39 @@ std::string RTLIL::Const::decode_string() const
return string;
}
bool RTLIL::Const::is_fully_zero() const
{
cover("kernel.rtlil.const.is_fully_zero");
for (auto bit : bits)
if (bit != RTLIL::State::S0)
return false;
return true;
}
bool RTLIL::Const::is_fully_def() const
{
cover("kernel.rtlil.const.is_fully_def");
for (auto bit : bits)
if (bit != RTLIL::State::S0 && bit != RTLIL::State::S1)
return false;
return true;
}
bool RTLIL::Const::is_fully_undef() const
{
cover("kernel.rtlil.const.is_fully_undef");
for (auto bit : bits)
if (bit != RTLIL::State::Sx && bit != RTLIL::State::Sz)
return false;
return true;
}
void RTLIL::AttrObject::set_bool_attribute(RTLIL::IdString id)
{
attributes[id] = RTLIL::Const(1);

4
kernel/rtlil.h
View file

@ -479,6 +479,10 @@ struct RTLIL::Const
inline RTLIL::State &operator[](int index) { return bits.at(index); }
inline const RTLIL::State &operator[](int index) const { return bits.at(index); }
bool is_fully_zero() const;
bool is_fully_def() const;
bool is_fully_undef() const;
inline RTLIL::Const extract(int offset, int len = 1, RTLIL::State padding = RTLIL::State::S0) const {
RTLIL::Const ret;
ret.bits.reserve(len);