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Various equiv_simple improvements

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This commit is contained in:
Clifford Wolf 2015-01-22 13:40:26 +01:00
parent 0a225f8b27
commit a6aa32e762
2 changed files with 69 additions and 25 deletions
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19
kernel/satgen.h
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@ -1163,6 +1163,25 @@ struct SatGen
return true;
}
if (cell->type == "$_BUF_" || cell->type == "$equiv")
{
std::vector<int> a = importDefSigSpec(cell->getPort("\\A"), timestep);
std::vector<int> y = importDefSigSpec(cell->getPort("\\Y"), timestep);
extendSignalWidthUnary(a, y, cell);
std::vector<int> yy = model_undef ? ez->vec_var(y.size()) : y;
ez->assume(ez->vec_eq(a, yy));
if (model_undef) {
std::vector<int> undef_a = importUndefSigSpec(cell->getPort("\\A"), timestep);
std::vector<int> undef_y = importUndefSigSpec(cell->getPort("\\Y"), timestep);
extendSignalWidthUnary(undef_a, undef_y, cell, false);
ez->assume(ez->vec_eq(undef_a, undef_y));
undefGating(y, yy, undef_y);
}
return true;
}
if (cell->type == "$assert")
{
std::string pf = prefix + (timestep == -1 ? "" : stringf("@%d:", timestep));