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Use pmsub in twoprod. This speeds up pow() on Skylake by ~1%.

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Rasmus Munk Larsen 2023-02-21 20:09:29 +00:00
parent ce62177b5b
commit 6bcd941ee3
1 changed files with 1 additions and 1 deletions
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Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h
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@ -1248,7 +1248,7 @@ EIGEN_STRONG_INLINE
void twoprod(const Packet& x, const Packet& y,
Packet& p_hi, Packet& p_lo) {
p_hi = pmul(x, y);
p_lo = pmadd(x, y, pnegate(p_hi));
p_lo = pmsub(x, y, p_hi);
}
#else