ncnn

1
// Tencent is pleased to support the open source community by making ncnn available.
2
//
3
// Copyright (C) 2021 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
#include "hardswish_mips.h"
16

17
#if __mips_msa
18
#include <msa.h>
19
#endif // __mips_msa
20

21
#include "mips_usability.h"
22

23
namespace ncnn {
24

25
HardSwish_mips::HardSwish_mips()
26
{
27
#if __mips_msa
28
    support_packing = true;
29
#endif // __mips_msa
30
}
31

32
int HardSwish_mips::forward_inplace(Mat& bottom_top_blob, const Option& opt) const
33
{
34
    int w = bottom_top_blob.w;
35
    int h = bottom_top_blob.h;
36
    int d = bottom_top_blob.d;
37
    int channels = bottom_top_blob.c;
38
    int elempack = bottom_top_blob.elempack;
39
    int size = w * h * d * elempack;
40

41
    #pragma omp parallel for num_threads(opt.num_threads)
42
    for (int q = 0; q < channels; q++)
43
    {
44
        float* ptr = bottom_top_blob.channel(q);
45

46
        int i = 0;
47
#if __mips_msa
48
        v4f32 _zero = (v4f32)__msa_fill_w(0);
49
        v4f32 _one = (v4f32)__msa_fill_w_f32(1.f);
50
        v4f32 _alpha = (v4f32)__msa_fill_w_f32(alpha);
51
        v4f32 _beta = (v4f32)__msa_fill_w_f32(beta);
52
        for (; i + 3 < size; i += 4)
53
        {
54
            __builtin_prefetch(ptr + 16);
55
            v4f32 _p = (v4f32)__msa_ld_w(ptr, 0);
56
            v4f32 _outp = __msa_fmadd_w(_beta, _p, _alpha);
57
            _outp = __msa_fmax_w(_outp, _zero);
58
            _outp = __msa_fmin_w(_outp, _one);
59
            _outp = __msa_fmul_w(_outp, _p);
60
            __msa_st_w((v4i32)_outp, ptr, 0);
61

62
            ptr += 4;
63
        }
64
#endif // __mips_msa
65
        for (; i < size; i++)
66
        {
67
            if (*ptr < lower)
68
                *ptr = 0.f;
69
            else if (*ptr > upper)
70
                ;
71
            else
72
                *ptr = *ptr * (*ptr * alpha + beta);
73
            ++ptr;
74
        }
75
    }
76

77
    return 0;
78
}
79

80
} // namespace ncnn
81