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Implement generic bitwise logical packet ops that work for all types.

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This commit is contained in:
Rasmus Munk Larsen 2020-10-08 22:45:20 +00:00
parent 8f8d77b516
commit 183a208212
1 changed files with 24 additions and 3 deletions
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27
Eigen/src/Core/GenericPacketMath.h
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@ -304,17 +304,38 @@ EIGEN_DEVICE_FUNC inline std::complex<RealScalar> ptrue(const std::complex<RealS
return std::complex<RealScalar>(b, b);
}
template <typename Packet, typename Op>
Packet bitwise_helper(const Packet& a, const Packet& b, Op op) {
const unsigned char* a_ptr = reinterpret_cast<const unsigned char*>(&a);
const unsigned char* b_ptr = reinterpret_cast<const unsigned char*>(&b);
Packet c;
unsigned char* c_ptr = reinterpret_cast<unsigned char*>(&c);
for (size_t i = 0; i < sizeof(Packet); ++i) {
*c_ptr++ = op(*a_ptr++, *b_ptr++);
}
return c;
}
/** \internal \returns the bitwise and of \a a and \a b */
template<typename Packet> EIGEN_DEVICE_FUNC inline Packet
pand(const Packet& a, const Packet& b) { return a & b; }
pand(const Packet& a, const Packet& b) {
EIGEN_USING_STD(bit_and);
return bitwise_helper(a ,b, bit_and<unsigned char>());
}
/** \internal \returns the bitwise or of \a a and \a b */
template<typename Packet> EIGEN_DEVICE_FUNC inline Packet
por(const Packet& a, const Packet& b) { return a | b; }
por(const Packet& a, const Packet& b) {
EIGEN_USING_STD(bit_or);
return bitwise_helper(a ,b, bit_or<unsigned char>());
}
/** \internal \returns the bitwise xor of \a a and \a b */
template<typename Packet> EIGEN_DEVICE_FUNC inline Packet
pxor(const Packet& a, const Packet& b) { return a ^ b; }
pxor(const Packet& a, const Packet& b) {
EIGEN_USING_STD(bit_xor);
return bitwise_helper(a ,b, bit_xor<unsigned char>());
}
/** \internal \returns the bitwise and of \a a and not \a b */
template<typename Packet> EIGEN_DEVICE_FUNC inline Packet