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Added proper === and !== support in constant expressions

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This commit is contained in:
Clifford Wolf 2013-12-27 13:50:08 +01:00
parent 11ffa78677
commit ecc30255ba
9 changed files with 79 additions and 15 deletions
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29
kernel/calc.cc
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@ -386,6 +386,35 @@ RTLIL::Const RTLIL::const_ne(const RTLIL::Const &arg1, const RTLIL::Const &arg2,
return result;
}
RTLIL::Const RTLIL::const_eqx(const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len)
{
RTLIL::Const arg1_ext = arg1;
RTLIL::Const arg2_ext = arg2;
RTLIL::Const result(RTLIL::State::S0, result_len);
int width = std::max(arg1_ext.bits.size(), arg2_ext.bits.size());
extend_u0(arg1_ext, width, signed1 && signed2);
extend_u0(arg2_ext, width, signed1 && signed2);
for (size_t i = 0; i < arg1_ext.bits.size(); i++) {
if (arg1_ext.bits.at(i) != arg2_ext.bits.at(i))
return result;
}
result.bits.front() = RTLIL::State::S1;
return result;
}
RTLIL::Const RTLIL::const_nex(const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len)
{
RTLIL::Const result = RTLIL::const_eqx(arg1, arg2, signed1, signed2, result_len);
if (result.bits.front() == RTLIL::State::S0)
result.bits.front() = RTLIL::State::S1;
else if (result.bits.front() == RTLIL::State::S1)
result.bits.front() = RTLIL::State::S0;
return result;
}
RTLIL::Const RTLIL::const_ge(const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len)
{
int undef_bit_pos = -1;

2
kernel/rtlil.h
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@ -174,6 +174,8 @@ namespace RTLIL
RTLIL::Const const_le (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
RTLIL::Const const_eq (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
RTLIL::Const const_ne (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
RTLIL::Const const_eqx (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
RTLIL::Const const_nex (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
RTLIL::Const const_ge (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
RTLIL::Const const_gt (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);