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change Xor/ Xnor from 12T to 10T variants #13

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Merged
merged 1 commit into from
Nov 6, 2025
+10 −16
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change Xor/ Xnor from 12T to 10T variants #13

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26 changes: 10 additions & 16 deletions std/cells.act
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Original file line number Diff line number Diff line change
Expand Up @@ -233,34 +233,28 @@ export defcell AND2X2 (bool? A, B; bool! Y)

export defcell XOR2X1 (bool? A, B; bool! Y)
{
bool _A, _B;
bool C;
spec {
hazard (_A,_B)
hazard (C)
}
prs {
A => _A-
B => _B-

[keeper=2] ~B & ~_A | ~_B & ~A -> Y+
_B & _A | B & A -> Y-
A | B => C-
C | (A & B)=> Y-
}
sizing { _A{-1}; _B{-1}; Y{-1} }
sizing { C{-1}; Y{-1} }
}

export defcell XNOR2X1 (bool? A, B; bool! Y)
{
bool _A, _B;
bool C;
spec {
hazard (_A, _B)
hazard (C)
}
prs {
A => _A-
B => _B-

[keeper=2] ~B & ~A | ~_B & ~_A -> Y+
B & _A | _B & A -> Y-
A & B => C-
(A | B) & C => Y-
}
sizing { _A{-1}; _B{-1}; Y{-1} }
sizing { C{-1}; Y{-1} }
}

export defcell MUX2X1 (bool? A, B, S; bool! Y)
Expand Down