123 lines
3.8 KiB
C++
123 lines
3.8 KiB
C++
/* Copyright 2019 The TensorFlow Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#include "tensorflow/lite/delegates/gpu/gl/kernels/slice.h"
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#include <algorithm>
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#include <cstdint>
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#include <cstring>
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#include <string>
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#include <vector>
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#include "absl/memory/memory.h"
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#include "tensorflow/lite/delegates/gpu/common/status.h"
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#include "tensorflow/lite/delegates/gpu/common/types.h"
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#include "tensorflow/lite/delegates/gpu/gl/variable.h"
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namespace tflite {
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namespace gpu {
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namespace gl {
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namespace {
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class Slice : public NodeShader {
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public:
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Status GenerateCode(const GenerationContext& ctx,
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GeneratedCode* generated_code) const final {
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auto output = ctx.graph->FindOutputs(ctx.node->id)[0];
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auto attr =
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absl::any_cast<const SliceAttributes&>(ctx.node->operation.attributes);
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const int4 channels(attr.starts.c, attr.strides.c, attr.ends.c, 0);
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const int4 heights(attr.starts.h, attr.strides.h, attr.ends.h, 0);
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const int4 widths(attr.starts.w, attr.strides.w, attr.ends.w, 0);
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std::vector<Variable> parameters = {
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{"channels", channels},
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{"heights", heights},
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{"widths", widths},
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{"dst_size", output->tensor.shape.c},
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};
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std::string code;
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code += " ivec2 offset;\n";
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if (attr.strides.w > 0) {
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code += " offset.x = $widths.x$;\n";
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} else {
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if (attr.ends.w > 0) {
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code += " offset.x = $widths.z$;\n";
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} else {
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code += " offset.x = $src_size.x$ + $widths.z$;\n";
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}
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}
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if (attr.strides.h > 0) {
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code += " offset.y = $heights.x$;\n";
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} else {
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if (attr.ends.h > 0) {
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code += " offset.y = $heights.z$;\n";
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} else {
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code += " offset.y = src_height + $heights.z$;\n";
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}
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}
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code += " ivec2 stride = ivec2($widths.y$, $heights.y$);\n";
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code += " ivec2 coord = offset + ivec2(gid.xy) * stride;\n";
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code += " bool outside = false;\n";
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code += " int step = gid.z * 4;\n";
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code += " int buffer_index = 0;\n";
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code += " int addr = 0;\n";
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for (int i = 0; i < 4; i++) {
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code += " addr = step * $channels.y$;\n";
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if (attr.strides.c > 0) {
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code += " addr += $channels.x$;\n";
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} else {
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if (attr.ends.c > 0) {
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code += " addr += $channels.z$;\n";
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} else {
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code += " addr += src_channels + $channels.z$;\n";
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}
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}
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code += " if (step < $dst_size$) {\n value_0[" +
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std::to_string(i) +
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"] = $input_data_0[coord.x, coord.y, addr / 4]$[addr % 4];\n "
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" }\n";
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if (i != 3) {
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code += " step++;\n";
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}
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}
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*generated_code = {
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/*parameters=*/std::move(parameters),
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/*objects=*/{},
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/*shared_variables=*/{},
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/*workload=*/uint3(),
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/*workgroup=*/uint3(),
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/*source_code=*/std::move(code),
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/*input=*/IOStructure::ONLY_DEFINITIONS,
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/*output=*/IOStructure::AUTO,
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};
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return OkStatus();
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}
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};
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} // namespace
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std::unique_ptr<NodeShader> NewSliceNodeShader() {
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return absl::make_unique<Slice>();
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}
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} // namespace gl
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} // namespace gpu
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} // namespace tflite
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