1// Tencent is pleased to support the open source community by making ncnn available.
2//
3// Copyright (C) 2020 THL A29 Limited, a Tencent company. All rights reserved.
4//
5// Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
6// in compliance with the License. You may obtain a copy of the License at
7//
8// https://opensource.org/licenses/BSD-3-Clause
9//
10// Unless required by applicable law or agreed to in writing, software distributed
11// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
12// CONDITIONS OF ANY KIND, either express or implied. See the License for the
13// specific language governing permissions and limitations under the License.
14
15#version 450
16
17#if NCNN_fp16_storage
18#extension GL_EXT_shader_16bit_storage: require
19struct sfpvec8 { f16vec4 abcd; f16vec4 efgh; };
20#endif
21#if NCNN_fp16_arithmetic
22#extension GL_EXT_shader_explicit_arithmetic_types_float16: require
23#endif
24
25layout (constant_id = 0) const float slope = 0;
26
27#define shape_constant_id_offset 1
28layout (constant_id = shape_constant_id_offset + 0) const int dims = 0;
29layout (constant_id = shape_constant_id_offset + 1) const int w = 0;
30layout (constant_id = shape_constant_id_offset + 2) const int h = 0;
31layout (constant_id = shape_constant_id_offset + 3) const int c = 0;
32layout (constant_id = shape_constant_id_offset + 4) const int cstep = 0;
33
34#if NCNN_image_shader
35layout (binding = 0) uniform unfp sampler3D bottom_blob_3d;
36layout (binding = 1, imfmtc4) writeonly uniform unfp image3D top_blob_3d;
37#else
38layout (binding = 0) buffer bottom_top_blob { sfpvec8 bottom_top_blob_data[]; };
39#endif
40
41layout (push_constant) uniform parameter
42{
43    int dims;
44    int w;
45    int h;
46    int c;
47    int cstep;
48} p;
49
50void main()
51{
52    int gx = int(gl_GlobalInvocationID.x);
53    int gy = int(gl_GlobalInvocationID.y);
54    int gz = int(gl_GlobalInvocationID.z);
55
56    if (gx >= psc(w) || gy >= psc(h) || gz >= psc(c))
57        return;
58
59#if NCNN_image_shader
60    afpvec8 v = image3d_ld8(bottom_blob_3d, ivec3(gx, gy, gz));
61#else
62    const int gi = gz * psc(cstep) + gy * psc(w) + gx;
63
64    afpvec8 v = buffer_ld8(bottom_top_blob_data, gi);
65#endif
66
67    if (slope == 0)
68    {
69        v[0] = max(v[0], afp(0.f));
70        v[1] = max(v[1], afp(0.f));
71    }
72    else
73    {
74        v[0] = mix(v[0], v[0] * afp(slope), lessThan(v[0], afpvec4(0.f)));
75        v[1] = mix(v[1], v[1] * afp(slope), lessThan(v[1], afpvec4(0.f)));
76    }
77
78#if NCNN_image_shader
79    image3d_st8(top_blob_3d, ivec3(gx, gy, gz), v);
80#else
81    buffer_st8(bottom_top_blob_data, gi, v);
82#endif
83}
84