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) 2022 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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struct sfpvec8 { f16vec4 abcd; f16vec4 efgh; };
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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 batch = 1;
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#define shape_constant_id_offset 1
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layout (constant_id = shape_constant_id_offset + 0) const int c = 0;
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layout (constant_id = shape_constant_id_offset + 1) const int cstep = 0;
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layout (constant_id = shape_constant_id_offset + 2) const int outw = 0;
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layout (constant_id = shape_constant_id_offset + 3) const int outc = 0;
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layout (constant_id = shape_constant_id_offset + 4) const int outcstep = 0;
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#if NCNN_image_shader
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layout (binding = 0) uniform unfp sampler3D bottom_tm_blob;
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layout (binding = 1, imfmtc1) writeonly uniform unfp image3D top_tm_blob;
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layout (binding = 2) uniform unfp sampler3D weight_tm_blob;
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#else
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layout (binding = 0) readonly buffer bottom_tm_blob { sfpvec8 bottom_tm_blob_data[]; };
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layout (binding = 1) writeonly buffer top_tm_blob { sfp top_tm_blob_data[]; };
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layout (binding = 2) readonly buffer weight_tm_blob { sfpvec8 weight_tm_data[]; };
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#endif
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layout (push_constant) uniform parameter
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{
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    int c;
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    int cstep;
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    int outw;
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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) * 4;
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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(outc) || gz >= batch)
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        return;
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    afp sum0 = afp(0.f);
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    afp sum1 = afp(0.f);
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    afp sum2 = afp(0.f);
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    afp sum3 = afp(0.f);
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#if NCNN_image_shader
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    for (int z = 0; z < psc(c); z++)
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    {
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        afpvec8 v0 = image3d_ld8(bottom_tm_blob, ivec3(gx + 0, z, gz));
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        afpvec8 v1 = image3d_ld8(bottom_tm_blob, ivec3(gx + 1, z, gz));
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        afpvec8 v2 = image3d_ld8(bottom_tm_blob, ivec3(gx + 2, z, gz));
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        afpvec8 v3 = image3d_ld8(bottom_tm_blob, ivec3(gx + 3, z, gz));
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        afpvec8 k = image3d_ld8(weight_tm_blob, ivec3(z, gy, gz));
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        // sum += dot(v, k);
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        sum0 += dot(v0[0], k[0]) + dot(v0[1], k[1]);
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        sum1 += dot(v1[0], k[0]) + dot(v1[1], k[1]);
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        sum2 += dot(v2[0], k[0]) + dot(v2[1], k[1]);
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        sum3 += dot(v3[0], k[0]) + dot(v3[1], k[1]);
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    }
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#else
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    int v_offset = gz * psc(cstep) + gx;
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    int w_offset = gz * psc(c) * psc(outc) + gy * psc(c);
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    for (int z = 0; z < psc(c); z++)
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    {
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        afpvec8 v0 = buffer_ld8(bottom_tm_blob_data, v_offset + 0);
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        afpvec8 v1 = buffer_ld8(bottom_tm_blob_data, v_offset + 1);
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        afpvec8 v2 = buffer_ld8(bottom_tm_blob_data, v_offset + 2);
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        afpvec8 v3 = buffer_ld8(bottom_tm_blob_data, v_offset + 3);
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        afpvec8 k = buffer_ld8(weight_tm_data, w_offset);
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        // sum += dot(v, k);
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        sum0 += dot(v0[0], k[0]) + dot(v0[1], k[1]);
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        sum1 += dot(v1[0], k[0]) + dot(v1[1], k[1]);
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        sum2 += dot(v2[0], k[0]) + dot(v2[1], k[1]);
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        sum3 += dot(v3[0], k[0]) + dot(v3[1], k[1]);
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        v_offset += psc(outw);
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        w_offset += 1;
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    }
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#endif
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#if NCNN_image_shader
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    image3d_st1(top_tm_blob, ivec3(gx + 0, gy, gz), sum0);
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    image3d_st1(top_tm_blob, ivec3(gx + 1, gy, gz), sum1);
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    image3d_st1(top_tm_blob, ivec3(gx + 2, gy, gz), sum2);
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    image3d_st1(top_tm_blob, ivec3(gx + 3, gy, gz), sum3);
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#else
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    int gi = gz * psc(outcstep) + gy * psc(outw) + gx;
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    buffer_st1(top_tm_blob_data, gi + 0, sum0);
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    if (gx + 1 < psc(outw)) buffer_st1(top_tm_blob_data, gi + 1, sum1);
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    if (gx + 2 < psc(outw)) buffer_st1(top_tm_blob_data, gi + 2, sum2);
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    if (gx + 3 < psc(outw)) buffer_st1(top_tm_blob_data, gi + 3, sum3);
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#endif
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}
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