ncnn

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// Tencent is pleased to support the open source community by making ncnn available.
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//
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// Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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//
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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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//
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// https://opensource.org/licenses/BSD-3-Clause
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//
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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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#version 450
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#if NCNN_fp16_storage
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#extension GL_EXT_shader_16bit_storage: require
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#endif
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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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#endif
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layout (constant_id = 0) const int region_type = 0;
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layout (constant_id = 1) const int pad_head = 0;
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layout (constant_id = 2) const int pad_tail = 0;
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#define shape_constant_id_offset 3
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layout (constant_id = shape_constant_id_offset + 0) const int dims = 0;
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layout (constant_id = shape_constant_id_offset + 1) const int w = 0;
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layout (constant_id = shape_constant_id_offset + 2) const int h = 0;
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layout (constant_id = shape_constant_id_offset + 3) const int c = 0;
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layout (constant_id = shape_constant_id_offset + 4) const int cstep = 0;
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layout (constant_id = shape_constant_id_offset + 5) const int outdims = 0;
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layout (constant_id = shape_constant_id_offset + 6) const int outw = 0;
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layout (constant_id = shape_constant_id_offset + 7) const int outh = 0;
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layout (constant_id = shape_constant_id_offset + 8) const int outc = 0;
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layout (constant_id = shape_constant_id_offset + 9) const int outcstep = 0;
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#if NCNN_image_shader
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layout (binding = 0) uniform unfp sampler3D bottom_blob;
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layout (binding = 1, r32f) writeonly uniform highp image3D square_workspace;
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#else
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layout (binding = 0) readonly buffer bottom_blob { sfpvec4 bottom_blob_data[]; };
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layout (binding = 1) writeonly buffer square_workspace { float square_workspace_data[]; };
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#endif
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layout (push_constant) uniform parameter
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{
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    int dims;
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    int w;
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    int h;
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    int c;
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    int cstep;
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    int outdims;
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    int outw;
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    int outh;
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    int outc;
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    int outcstep;
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} p;
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void main()
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{
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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(outw) || gy >= psc(outh) || gz >= psc(outc))
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        return;
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    // support region_type == 0 only
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    afp res;
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    int z = int(floor(afp(gz - pad_head) / 4.f));
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    if (z >= 0 && z < psc(c))
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    {
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#if NCNN_image_shader
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        afpvec4 v4 = image3d_ld4(bottom_blob, ivec3(gx, gy, z));
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#else
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        int v_offset = z * psc(cstep) + gy * psc(w) + gx;
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        afpvec4 v4 = buffer_ld4(bottom_blob_data, v_offset);
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#endif
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        int lane = (gz - pad_head) % 4;
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        afp v = v4[lane];
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        res = v * v;
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    }
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    else
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    {
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        res = afp(0.f);
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    }
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#if NCNN_image_shader
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    imageStore(square_workspace, ivec3(gx, gy, gz), vec4(float(res)));
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#else
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    const int gi = gz * psc(outcstep) + gy * psc(outw) + gx;
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    square_workspace_data[gi] = float(res);
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#endif
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}
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