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[ripemd160] Small optimizations for compression #938

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[ripemd160] Small optimizations for compression #938

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4 changes: 2 additions & 2 deletions crates/frontend/src/circuits/ripemd.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -169,7 +169,7 @@ fn f(b: &CircuitBuilder, x: Wire, y: Wire, z: Wire) -> Wire {

// Selection function g(x, y, z) = (x AND y) OR (NOT x AND z) = z XOR (x AND (y XOR z))
fn g(b: &CircuitBuilder, x: Wire, y: Wire, z: Wire) -> Wire {
b.bor(b.band(x, y), b.band(b.bnot(x), z))
b.bxor(z, b.band(x, b.bxor(y, z)))
}

// Selection function h(x, y, z) = (x OR NOT y) XOR z
Expand All @@ -179,7 +179,7 @@ fn h(b: &CircuitBuilder, x: Wire, y: Wire, z: Wire) -> Wire {

// Selection function i(x, y, z) = (x AND z) OR (y AND NOT z) = y XOR (z AND (x XOR y))
fn i(b: &CircuitBuilder, x: Wire, y: Wire, z: Wire) -> Wire {
b.bor(b.band(x, z), b.band(y, b.bnot(z)))
b.bxor(y, b.band(z, b.bxor(x, y)))
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@pepyakin pepyakin Sep 3, 2025

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could use the new operator named FAX (fused-and-xor).

}

// Selection function j(x, y, z) = x XOR (y OR NOT z)
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