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// Tencent is pleased to support the open source community by making ncnn available.
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// Copyright (C) 2020 THL A29 Limited, a Tencent company. All rights reserved.
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// Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
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// in compliance with the License. You may obtain a copy of the License at
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// https://opensource.org/licenses/BSD-3-Clause
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// Unless required by applicable law or agreed to in writing, software distributed
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// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations under the License.
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#extension GL_EXT_shader_16bit_storage: require
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struct sfpvec8 { f16vec4 abcd; f16vec4 efgh; };
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#if NCNN_fp16_arithmetic
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#extension GL_EXT_shader_explicit_arithmetic_types_float16: require
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#define shape_constant_id_offset 0
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layout (constant_id = shape_constant_id_offset + 0) const int w = 0;
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layout (constant_id = shape_constant_id_offset + 1) const int h = 0;
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layout (constant_id = shape_constant_id_offset + 2) const int c = 0;
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layout (constant_id = shape_constant_id_offset + 3) const int cstep = 0;
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layout (binding = 0) uniform highp sampler3D bottom_top_blob;
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layout (binding = 1, rgba32f) writeonly uniform highp image3D mean_blob;
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layout (binding = 0) readonly buffer bottom_top_blob { mat2x4 bottom_top_blob_data[]; };
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layout (binding = 1) writeonly buffer mean_blob { mat2x4 mean_data[]; };
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layout (push_constant) uniform parameter
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int gx = int(gl_GlobalInvocationID.x);
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int gy = int(gl_GlobalInvocationID.y);
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int gz = int(gl_GlobalInvocationID.z);
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if (gx >= psc(c) || gy >= 1 || gz >= 1)
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mat2x4 sum = mat2x4(0.f);
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for (int i = 0; i < p.h; i++)
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for (int j = 0; j < p.w; j++)
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sum += mat2x4(texelFetch(bottom_top_blob, ivec3(j * 2, i, gx), 0), texelFetch(bottom_top_blob, ivec3(j * 2 + 1, i, gx), 0));
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int v_offset = gx * psc(cstep);
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for (int i = 0; i < p.w; i++)
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sum += bottom_top_blob_data[v_offset];
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mean[0] = sum[0] / p.area;
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mean[1] = sum[1] / p.area;
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imageStore(mean_blob, ivec3(gx * 2, 0, 0), mean[0]);
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imageStore(mean_blob, ivec3(gx * 2 + 1, 0, 0), mean[1]);