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Add half-Packet operations to StridedLinearBufferCopy.

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This commit is contained in:
Pedro Gonnet 2023-05-01 16:09:31 +00:00 committed by Rasmus Munk Larsen
parent c9a14f48d9
commit 874f5947f4
1 changed files with 51 additions and 5 deletions
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56
unsupported/Eigen/CXX11/src/Tensor/TensorBlock.h
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@ -994,9 +994,12 @@ class TensorTernaryExprBlock {
template <typename Scalar, typename IndexType>
class StridedLinearBufferCopy {
typedef typename packet_traits<Scalar>::type Packet;
typedef typename unpacket_traits<Packet>::half HalfPacket;
enum {
Vectorizable = packet_traits<Scalar>::Vectorizable,
PacketSize = packet_traits<Scalar>::size
PacketSize = packet_traits<Scalar>::size,
HasHalfPacket = unpacket_traits<HalfPacket>::size < PacketSize,
HalfPacketSize = unpacket_traits<HalfPacket>::size,
};
public:
@ -1070,6 +1073,14 @@ class StridedLinearBufferCopy {
Packet p = ploadu<Packet>(src + i);
pstoreu<Scalar, Packet>(dst + i, p);
}
if (HasHalfPacket) {
const IndexType vectorized_half_size = count - HalfPacketSize;
if (i <= vectorized_half_size) {
HalfPacket p = ploadu<HalfPacket>(src + i);
pstoreu<Scalar, HalfPacket>(dst + i, p);
i += HalfPacketSize;
}
}
for (; i < count; ++i) {
dst[i] = src[i];
}
@ -1081,6 +1092,14 @@ class StridedLinearBufferCopy {
Packet p = ploadu<Packet>(src + i);
pscatter<Scalar, Packet>(dst + i * dst_stride, p, dst_stride);
}
if (HasHalfPacket) {
const IndexType vectorized_half_size = count - HalfPacketSize;
if (i <= vectorized_half_size) {
HalfPacket p = ploadu<HalfPacket>(src + i);
pscatter<Scalar, HalfPacket>(dst + i * dst_stride, p, dst_stride);
i += HalfPacketSize;
}
}
for (; i < count; ++i) {
dst[i * dst_stride] = src[i];
}
@ -1089,7 +1108,8 @@ class StridedLinearBufferCopy {
// Fill `dst` with value at `*src`.
eigen_assert(src_stride == 0 && dst_stride == 1);
const IndexType unrolled_size = count - 4 * PacketSize;
Packet p = pload1<Packet>(src);
Scalar s = *src;
Packet p = pset1<Packet>(s);
for (; i <= unrolled_size; i += 4 * PacketSize) {
for (int j = 0; j < 4; ++j) {
pstoreu<Scalar, Packet>(dst + i + j * PacketSize, p);
@ -1098,19 +1118,36 @@ class StridedLinearBufferCopy {
for (; i <= vectorized_size; i += PacketSize) {
pstoreu<Scalar, Packet>(dst + i, p);
}
if (HasHalfPacket) {
const IndexType vectorized_half_size = count - HalfPacketSize;
if (i <= vectorized_half_size) {
HalfPacket hp = pset1<HalfPacket>(s);
pstoreu<Scalar, HalfPacket>(dst + i, hp);
i += HalfPacketSize;
}
}
for (; i < count; ++i) {
dst[i] = *src;
dst[i] = s;
}
// ******************************************************************** //
} else if (kind == StridedLinearBufferCopy::Kind::FillScatter) {
// Scatter `*src` into `dst`.
eigen_assert(src_stride == 0 && dst_stride != 1);
Packet p = pload1<Packet>(src);
Scalar s = *src;
Packet p = pset1<Packet>(s);
for (; i <= vectorized_size; i += PacketSize) {
pscatter<Scalar, Packet>(dst + i * dst_stride, p, dst_stride);
}
if (HasHalfPacket) {
const IndexType vectorized_half_size = count - HalfPacketSize;
if (i <= vectorized_half_size) {
HalfPacket hp = pset1<HalfPacket>(s);
pscatter<Scalar, HalfPacket>(dst + i * dst_stride, hp, dst_stride);
i += HalfPacketSize;
}
}
for (; i < count; ++i) {
dst[i * dst_stride] = *src;
dst[i * dst_stride] = s;
}
// ******************************************************************** //
} else if (kind == StridedLinearBufferCopy::Kind::Gather) {
@ -1120,6 +1157,15 @@ class StridedLinearBufferCopy {
Packet p = pgather<Scalar, Packet>(src + i * src_stride, src_stride);
pstoreu<Scalar, Packet>(dst + i, p);
}
if (HasHalfPacket) {
const IndexType vectorized_half_size = count - HalfPacketSize;
if (i <= vectorized_half_size) {
HalfPacket p =
pgather<Scalar, HalfPacket>(src + i * src_stride, src_stride);
pstoreu<Scalar, HalfPacket>(dst + i, p);
i += HalfPacketSize;
}
}
for (; i < count; ++i) {
dst[i] = src[i * src_stride];
}