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Diffstat (limited to 'Eigen/src/Core/GenericPacketMath.h')
| -rw-r--r-- | Eigen/src/Core/GenericPacketMath.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Eigen/src/Core/GenericPacketMath.h b/Eigen/src/Core/GenericPacketMath.h index 967a07df5..721280b2c 100644 --- a/Eigen/src/Core/GenericPacketMath.h +++ b/Eigen/src/Core/GenericPacketMath.h @@ -58,6 +58,7 @@ struct default_packet_traits HasDiv = 0, HasSqrt = 0, + HasRsqrt = 0, HasExp = 0, HasLog = 0, HasPow = 0, @@ -352,6 +353,14 @@ Packet plog(const Packet& a) { using std::log; return log(a); } template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS Packet psqrt(const Packet& a) { using std::sqrt; return sqrt(a); } +/** \internal \returns the reciprocal square-root of \a a (coeff-wise) */ +template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS +Packet prsqrt(const Packet& a) { + using std::sqrt; + const Packet one(1); + return one/sqrt(a); +} + /*************************************************************************** * The following functions might not have to be overwritten for vectorized types ***************************************************************************/ |