2 * Copyright (c) 2017 ARM Limited.
4 * SPDX-License-Identifier: MIT
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 #if defined(WIDTH) && defined(HEIGHT) && defined(DEPTH)
27 /** This function identifies the min and maximum value of an input 3D tensor.
29 * @note The width, height and depth of the input tensor must be provided at compile time using -DWIDTH, -DHEIGHT and -DDEPTH (e.g. -DWIDTH=320, -DHEIGHT=240, -DDEPTH=3)
31 * @param[in] src_ptr Pointer to the source tensor. Supported data types: F32
32 * @param[in] src_stride_x Stride of the source image in X dimension (in bytes)
33 * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes)
34 * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes)
35 * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes)
36 * @param[in] src_stride_z Stride of the source image in Z dimension (in bytes)
37 * @param[in] src_step_z src_stride_z * number of elements along Z processed per workitem(in bytes)
38 * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image
39 * @param[in] dst_ptr Pointer to the min/max vector. Minimum value in position 0, maximum value in position 1. Supported data types: F32.
40 * @param[in] dst_stride_x Stride of the min/max vector in X dimension (in bytes)
41 * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes)
42 * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the min/max vector
44 __kernel void minmax_layer(
45 TENSOR3D_DECLARATION(src),
46 VECTOR_DECLARATION(dst))
48 Tensor3D src = CONVERT_TO_TENSOR3D_STRUCT(src);
49 Vector dst = CONVERT_TO_VECTOR_STRUCT(dst);
51 float4 min_value = (float4)FLT_MAX;
52 float4 max_value = (float4) - FLT_MAX;
53 float2 min_max_value = (float2)(FLT_MAX, -FLT_MAX);
55 for(int z = 0; z < DEPTH; ++z)
57 for(int y = 0; y < HEIGHT; ++y)
60 __global float *src_addr = (__global float *)(src.ptr + y * src_stride_y + z * src_stride_z);
62 for(; x <= (int)(WIDTH - 8); x += 8)
64 float8 value = *(src_addr + x);
66 min_value = select(value.s0123, min_value, min_value < value.s0123);
67 min_value = select(value.s4567, min_value, min_value < value.s4567);
69 max_value = select(value.s0123, max_value, max_value > value.s0123);
70 max_value = select(value.s4567, max_value, max_value > value.s4567);
75 float value = *(src_addr + x);
77 min_max_value.s0 = min(min_max_value.s0, value);
78 min_max_value.s1 = max(min_max_value.s1, value);
83 // Perform min/max reduction
84 min_value.s01 = min(min_value.s01, min_value.s23);
85 min_value.s0 = min(min_value.s0, min_value.s1);
86 max_value.s01 = max(max_value.s01, max_value.s23);
87 max_value.s0 = max(max_value.s0, max_value.s1);
89 min_max_value.s0 = min(min_max_value.s0, min_value.s0);
90 min_max_value.s1 = max(min_max_value.s1, max_value.s0);
92 if(min_max_value.s0 == min_max_value.s1)
94 min_max_value.s0 = 0.0f;
95 min_max_value.s1 = 1.0f;
99 vstore2(min_max_value, 0, (__global float *)dst.ptr);
101 #endif // defined(WIDTH) && defined(HEIGHT) && defined(DEPTH)