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| 1 | +// Licensed to the Apache Software Foundation (ASF) under one |
| 2 | +// or more contributor license agreements. See the NOTICE file |
| 3 | +// distributed with this work for additional information |
| 4 | +// regarding copyright ownership. The ASF licenses this file |
| 5 | +// to you under the Apache License, Version 2.0 (the |
| 6 | +// "License"); you may not use this file except in compliance |
| 7 | +// with the License. You may obtain a copy of the License at |
| 8 | +// |
| 9 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | +// |
| 11 | +// Unless required by applicable law or agreed to in writing, |
| 12 | +// software distributed under the License is distributed on an |
| 13 | +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 14 | +// KIND, either express or implied. See the License for the |
| 15 | +// specific language governing permissions and limitations |
| 16 | +// under the License. |
| 17 | + |
| 18 | +#include "arrow/util/byte_stream_split_internal.h" |
| 19 | +#include "arrow/util/dispatch_internal.h" |
| 20 | + |
| 21 | +#include <array> |
| 22 | + |
| 23 | +namespace arrow::util::internal { |
| 24 | + |
| 25 | +using ::arrow::internal::DispatchLevel; |
| 26 | +using ::arrow::internal::DynamicDispatch; |
| 27 | + |
| 28 | +/************************ |
| 29 | + * Decode dispatching * |
| 30 | + ************************/ |
| 31 | + |
| 32 | +template <int kNumStreams> |
| 33 | +struct ByteStreamSplitDecodeDynamic { |
| 34 | + using FunctionType = decltype(&ByteStreamSplitDecodeScalar<kNumStreams>); |
| 35 | + using Implementation = std::pair<DispatchLevel, FunctionType>; |
| 36 | + |
| 37 | + constexpr static auto implementations() { |
| 38 | + return std::array { |
| 39 | + Implementation { |
| 40 | + DispatchLevel::NONE, |
| 41 | +#if defined(ARROW_HAVE_NEON) |
| 42 | + // We always expect Neon to be available on Arm64 |
| 43 | + &ByteStreamSplitDecodeSimd<xsimd::neon64, kNumStreams>, |
| 44 | +#elif defined(ARROW_HAVE_SSE4_2) |
| 45 | + // We always expect SSE4.2 to be available on x86_64 |
| 46 | + &ByteStreamSplitDecodeSimd<xsimd::sse4_2, kNumStreams>, |
| 47 | +#else |
| 48 | + &ByteStreamSplitDecodeScalar<kNumStreams>, |
| 49 | +#endif |
| 50 | + } |
| 51 | + , |
| 52 | +#if defined(ARROW_HAVE_RUNTIME_AVX2) |
| 53 | + Implementation{ |
| 54 | + DispatchLevel::AVX2, |
| 55 | + &ByteStreamSplitDecodeSimd<xsimd::avx2, kNumStreams>, |
| 56 | + }, |
| 57 | +#endif |
| 58 | + }; |
| 59 | + } |
| 60 | +}; |
| 61 | + |
| 62 | +template <int kNumStreams> |
| 63 | +void ByteStreamSplitDecodeSimdDispatch(const uint8_t* data, int width, int64_t num_values, |
| 64 | + int64_t stride, uint8_t* out) { |
| 65 | + static const DynamicDispatch<ByteStreamSplitDecodeDynamic<kNumStreams>> dispatch; |
| 66 | + return dispatch.func(data, width, num_values, stride, out); |
| 67 | +} |
| 68 | + |
| 69 | +template void ByteStreamSplitDecodeSimdDispatch<2>(const uint8_t*, int, int64_t, int64_t, |
| 70 | + uint8_t*); |
| 71 | +template void ByteStreamSplitDecodeSimdDispatch<4>(const uint8_t*, int, int64_t, int64_t, |
| 72 | + uint8_t*); |
| 73 | +template void ByteStreamSplitDecodeSimdDispatch<8>(const uint8_t*, int, int64_t, int64_t, |
| 74 | + uint8_t*); |
| 75 | + |
| 76 | +/************************ |
| 77 | + * Encode dispatching * |
| 78 | + ************************/ |
| 79 | + |
| 80 | +template <int kNumStreams> |
| 81 | +struct ByteStreamSplitEncodeDynamic { |
| 82 | + using FunctionType = decltype(&ByteStreamSplitEncodeScalar<kNumStreams>); |
| 83 | + using Implementation = std::pair<DispatchLevel, FunctionType>; |
| 84 | + |
| 85 | + constexpr static auto implementations() { |
| 86 | + return std::array { |
| 87 | + Implementation { |
| 88 | + DispatchLevel::NONE, |
| 89 | +#if defined(ARROW_HAVE_NEON) |
| 90 | + // We always expect Neon to be available on Arm64 |
| 91 | + &ByteStreamSplitEncodeSimd<xsimd::neon64, kNumStreams>, |
| 92 | +#elif defined(ARROW_HAVE_SSE4_2) |
| 93 | + // We always expect SSE4.2 to be available on x86_64 |
| 94 | + &ByteStreamSplitEncodeSimd<xsimd::sse4_2, kNumStreams>, |
| 95 | +#else |
| 96 | + &ByteStreamSplitEncodeScalar<kNumStreams>, |
| 97 | +#endif |
| 98 | + } |
| 99 | + , |
| 100 | +#if defined(ARROW_HAVE_RUNTIME_AVX2) |
| 101 | + Implementation{DispatchLevel::AVX2, &ByteStreamSplitEncodeAvx2<kNumStreams>}, |
| 102 | +#endif |
| 103 | + }; |
| 104 | + } |
| 105 | +}; |
| 106 | + |
| 107 | +template <int kNumStreams> |
| 108 | +void ByteStreamSplitEncodeSimdDispatch(const uint8_t* raw_values, int width, |
| 109 | + const int64_t num_values, |
| 110 | + uint8_t* output_buffer_raw) { |
| 111 | + static const DynamicDispatch<ByteStreamSplitEncodeDynamic<kNumStreams>> dispatch; |
| 112 | + return dispatch.func(raw_values, width, num_values, output_buffer_raw); |
| 113 | +} |
| 114 | + |
| 115 | +template void ByteStreamSplitEncodeSimdDispatch<2>(const uint8_t*, int, const int64_t, |
| 116 | + uint8_t*); |
| 117 | +template void ByteStreamSplitEncodeSimdDispatch<4>(const uint8_t*, int, const int64_t, |
| 118 | + uint8_t*); |
| 119 | +template void ByteStreamSplitEncodeSimdDispatch<8>(const uint8_t*, int, const int64_t, |
| 120 | + uint8_t*); |
| 121 | + |
| 122 | +} // namespace arrow::util::internal |
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