narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 1 | // |
| 2 | // Copyright © 2017 Arm Ltd. All rights reserved. |
| 3 | // SPDX-License-Identifier: MIT |
| 4 | // |
| 5 | |
| 6 | #include "Mean.hpp" |
Aron Virginas-Tar | c9cc804 | 2018-11-01 16:15:57 +0000 | [diff] [blame] | 7 | #include "backendsCommon/WorkloadData.hpp" |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 8 | |
| 9 | #include <boost/numeric/conversion/cast.hpp> |
| 10 | |
| 11 | #include <cmath> |
| 12 | #include <cstddef> |
| 13 | #include <functional> |
| 14 | #include <limits> |
| 15 | |
| 16 | namespace armnn |
| 17 | { |
| 18 | bool NextIndex(const unsigned int numDims, const armnn::TensorShape& dims, std::vector<unsigned int>& current) |
| 19 | { |
| 20 | unsigned int carry = 1; |
| 21 | |
| 22 | for (unsigned int idx = numDims; idx-- > 0; ) |
| 23 | { |
| 24 | unsigned int current_val = current[idx] + carry; |
| 25 | if (dims[idx] == current_val) |
| 26 | { |
| 27 | current[idx] = 0; |
| 28 | } |
| 29 | else |
| 30 | { |
| 31 | current[idx] = current_val; |
| 32 | carry = 0; |
| 33 | break; |
| 34 | } |
| 35 | } |
| 36 | return (carry == 0); |
| 37 | } |
| 38 | |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 39 | unsigned int ReducedOutputOffset(const unsigned int numDims, |
| 40 | const armnn::TensorShape& dims, |
| 41 | std::vector<unsigned int>& index, |
| 42 | const unsigned int numAxis, |
| 43 | const std::vector<unsigned int>& axis) |
| 44 | { |
| 45 | unsigned int offset = 0; |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 46 | for (unsigned int idx = 0; idx < numDims; ++idx) |
| 47 | { |
| 48 | bool isAxis = false; |
| 49 | if (!axis.empty()) |
| 50 | { |
| 51 | for (unsigned int axisIdx = 0; axisIdx < numAxis; ++axisIdx) |
| 52 | { |
| 53 | if (idx == axis[axisIdx]) |
| 54 | { |
| 55 | isAxis = true; |
| 56 | break; |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | if (!isAxis) |
| 61 | { |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 62 | offset = offset * dims[idx] + index[idx]; |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 63 | } |
| 64 | } |
| 65 | return offset; |
| 66 | } |
| 67 | } // namespace |
| 68 | |
| 69 | namespace armnn |
| 70 | { |
| 71 | void Mean(const armnn::TensorInfo& inputInfo, |
| 72 | const armnn::TensorInfo& outputInfo, |
| 73 | const std::vector<unsigned int>& axis, |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 74 | Decoder<float>& input, |
| 75 | Encoder<float>& output) |
| 76 | { |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 77 | |
| 78 | unsigned int inputNumDims = inputInfo.GetNumDimensions(); |
| 79 | unsigned int outputNumDims = outputInfo.GetNumDimensions(); |
| 80 | |
| 81 | armnn::TensorShape outputDims = outputInfo.GetShape(); |
| 82 | armnn::TensorShape inputDims = inputInfo.GetShape(); |
| 83 | |
| 84 | // Initialise output data. |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 85 | unsigned int numOutputs = 1; |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 86 | for (unsigned int idx = 0; idx < outputNumDims; ++idx) |
| 87 | { |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 88 | numOutputs *= outputDims[idx]; |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | std::vector<float> tempSum(numOutputs); |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 92 | for (unsigned int idx = 0; idx < numOutputs; ++idx) |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 93 | { |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 94 | output[idx]; |
| 95 | output.Set(0.0f); |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 96 | tempSum[idx] = 0.0f; |
| 97 | } |
| 98 | |
| 99 | // Initialise temp index. |
| 100 | std::vector<unsigned int> tempIndex(inputNumDims); |
| 101 | for (unsigned int idx = 0; idx < inputNumDims; ++idx) |
| 102 | { |
| 103 | tempIndex[idx] = 0; |
| 104 | } |
| 105 | |
| 106 | std::vector<unsigned int> resolvedAxis = axis; |
| 107 | if (resolvedAxis.empty()) |
| 108 | { |
| 109 | for (unsigned int idx = 0; idx < inputNumDims; ++idx) |
| 110 | { |
| 111 | resolvedAxis.push_back(idx); |
| 112 | } |
| 113 | } |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 114 | auto numResolvedAxis = boost::numeric_cast<unsigned int>(resolvedAxis.size()); |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 115 | |
| 116 | // Iterates through input_data and sum up the reduced axis. |
| 117 | for (bool hasNext = true; hasNext; hasNext = NextIndex(inputNumDims, inputDims, tempIndex)) |
| 118 | { |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 119 | unsigned int inputOffset = ReducedOutputOffset(inputNumDims, inputDims, tempIndex, 0, {}); |
| 120 | unsigned int outputOffset = ReducedOutputOffset(inputNumDims, inputDims, tempIndex, |
| 121 | numResolvedAxis, resolvedAxis); |
| 122 | input[inputOffset]; |
| 123 | tempSum[outputOffset] += input.Get(); |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | // Takes average by num of elements added to get mean. |
| 127 | size_t numElementsInAxis = 1; |
| 128 | for (unsigned int idx = 0; idx < numResolvedAxis; ++idx) |
| 129 | { |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 130 | unsigned int current = inputDims[resolvedAxis[idx]]; |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 131 | BOOST_ASSERT(boost::numeric_cast<float>(current) < |
| 132 | (std::numeric_limits<float>::max() / boost::numeric_cast<float>(numElementsInAxis))); |
| 133 | numElementsInAxis *= current; |
| 134 | } |
| 135 | if (numElementsInAxis > 0) { |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 136 | for (unsigned int idx = 0; idx < numOutputs; ++idx) |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 137 | { |
James Conroy | 4d1ff58 | 2019-06-10 17:06:39 +0100 | [diff] [blame] | 138 | output[idx]; |
| 139 | output.Set(tempSum[idx] / boost::numeric_cast<float>(numElementsInAxis)); |
narpra01 | 1e4c31d | 2018-09-28 11:07:51 +0100 | [diff] [blame] | 140 | } |
| 141 | } |
| 142 | } |
| 143 | } //namespace armnn |