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eliminate pmux in functional backend

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This commit is contained in:
Emily Schmidt 2024-07-17 13:35:58 +01:00
parent c0c90c2c31
commit 13bacc5c8f
5 changed files with 9 additions and 40 deletions
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1
backends/functional/cxx.cc
View file

@ -136,7 +136,6 @@ template<class NodePrinter> struct CxxPrintVisitor : public FunctionalIR::Abstra
void logical_shift_right(Node, Node a, Node b) override { print("{} >> {}", a, b); }
void arithmetic_shift_right(Node, Node a, Node b) override { print("{}.arithmetic_shift_right({})", a, b); }
void mux(Node, Node a, Node b, Node s) override { print("{2}.any() ? {1} : {0}", a, b, s); }
void pmux(Node, Node a, Node b, Node s) override { print("{0}.pmux({1}, {2})", a, b, s); }
void constant(Node, RTLIL::Const value) override {
std::stringstream ss;
bool multiple = value.size() > 32;

19
backends/functional/cxx_runtime/sim.h
View file

@ -368,25 +368,6 @@ public:
return ret;
}
template<size_t ns>
Signal<n> pmux(Signal<n*ns> const &b, Signal<ns> const &s) const
{
bool found;
Signal<n> ret;
found = false;
ret = *this;
for(size_t i = 0; i < ns; i++){
if(s._bits[i]){
if(found)
return 0;
found = true;
ret = b.template slice<n>(n * i);
}
}
return ret;
}
template<size_t m>
Signal<n+m> concat(Signal<m> const& b) const
{

6
backends/functional/smtlib.cc
View file

@ -174,12 +174,6 @@ struct SmtPrintVisitor : public FunctionalIR::AbstractVisitor<SExpr> {
SExpr logical_shift_right(Node, Node a, Node b) override { return list("bvlshr", n(a), extend(n(b), b.width(), a.width())); }
SExpr arithmetic_shift_right(Node, Node a, Node b) override { return list("bvashr", n(a), extend(n(b), b.width(), a.width())); }
SExpr mux(Node, Node a, Node b, Node s) override { return list("ite", to_bool(n(s)), n(b), n(a)); }
SExpr pmux(Node, Node a, Node b, Node s) override {
SExpr rv = n(a);
for(int i = 0; i < s.width(); i++)
rv = list("ite", to_bool(extract(n(s), i)), extract(n(b), a.width() * i, a.width()), rv);
return rv;
}
SExpr constant(Node, RTLIL::Const value) override { return literal(value); }
SExpr memory_read(Node, Node mem, Node addr) override { return list("select", n(mem), n(addr)); }
SExpr memory_write(Node, Node mem, Node addr, Node data) override { return list("store", n(mem), n(addr), n(data)); }