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bug #973: enable alignment of multiples of half-packet size (e.g., Vector6d with AVX)

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This commit is contained in:
Gael Guennebaud
2015-04-01 13:55:09 +02:00
parent 8481dc21ea
commit 39dcd01b0a
2 changed files with 33 additions and 6 deletions
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10
Eigen/src/Core/DenseStorage.h
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@@ -35,22 +35,22 @@ void check_static_allocation_size()
}
template<typename T, int Size, typename Packet = typename packet_traits<T>::type,
bool Match = bool((Size%unpacket_traits<Packet>::size)==0),
bool TryHalf = bool(int(unpacket_traits<Packet>::size) > Size)
bool Match = bool((Size%unpacket_traits<Packet>::size)==0),
bool TryHalf = bool(int(unpacket_traits<Packet>::size) > 1)
&& bool(int(unpacket_traits<Packet>::size) > int(unpacket_traits<typename unpacket_traits<Packet>::half>::size)) >
struct compute_default_alignment
{
enum { value = 0 };
};
template<typename T, int Size, typename Packet>
struct compute_default_alignment<T, Size, Packet, true, false> // Match
template<typename T, int Size, typename Packet, bool TryHalf>
struct compute_default_alignment<T, Size, Packet, true, TryHalf> // Match
{
enum { value = sizeof(T) * unpacket_traits<Packet>::size };
};
template<typename T, int Size, typename Packet>
struct compute_default_alignment<T, Size, Packet, false, true>
struct compute_default_alignment<T, Size, Packet, false, true> // Try-half
{
// current packet too large, try with an half-packet
enum { value = compute_default_alignment<T, Size, typename unpacket_traits<Packet>::half>::value };