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 #ifndef SSE_USABILITY_H
16 #define SSE_USABILITY_H
17 
18 #include <emmintrin.h>
19 
_mm_reduce_add_ps(__m128 x128)20 static inline float _mm_reduce_add_ps(__m128 x128)
21 {
22     const __m128 x64 = _mm_add_ps(x128, _mm_movehl_ps(x128, x128));
23     const __m128 x32 = _mm_add_ss(x64, _mm_shuffle_ps(x64, x64, 0x55));
24     return _mm_cvtss_f32(x32);
25 }
26 
27 #endif // SSE_USABILITY_H
28