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comparison mupdf-source/thirdparty/tesseract/src/arch/simddetect.h @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 ///////////////////////////////////////////////////////////////////////
2 // File: simddetect.h
3 // Description: Architecture detector.
4 // Author: Stefan Weil (based on code from Ray Smith)
5 //
6 // (C) Copyright 2014, Google Inc.
7 // Licensed under the Apache License, Version 2.0 (the "License");
8 // you may not use this file except in compliance with the License.
9 // You may obtain a copy of the License at
10 // http://www.apache.org/licenses/LICENSE-2.0
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16 ///////////////////////////////////////////////////////////////////////
17 #ifndef TESSERACT_ARCH_SIMDDETECT_H_
18 #define TESSERACT_ARCH_SIMDDETECT_H_
19
20 #include <tesseract/export.h>
21 #include "tesstypes.h"
22
23 namespace tesseract {
24
25 // Function pointer for best calculation of dot product.
26 using DotProductFunction = TFloat (*)(const TFloat *, const TFloat *, int);
27 extern DotProductFunction DotProduct;
28
29 // Architecture detector. Add code here to detect any other architectures for
30 // SIMD-based faster dot product functions. Intended to be a single static
31 // object, but it does no real harm to have more than one.
32 class SIMDDetect {
33 public:
34 // Returns true if AVX is available on this system.
35 static inline bool IsAVXAvailable() {
36 return detector.avx_available_;
37 }
38 // Returns true if AVX2 (integer support) is available on this system.
39 static inline bool IsAVX2Available() {
40 return detector.avx2_available_;
41 }
42 // Returns true if AVX512 Foundation (float) is available on this system.
43 static inline bool IsAVX512FAvailable() {
44 return detector.avx512F_available_;
45 }
46 // Returns true if AVX512 integer is available on this system.
47 static inline bool IsAVX512BWAvailable() {
48 return detector.avx512BW_available_;
49 }
50 // Returns true if AVX512 Vector Neural Network Instructions are available.
51 static inline bool IsAVX512VNNIAvailable() {
52 return detector.avx512VNNI_available_;
53 }
54 // Returns true if FMA is available on this system.
55 static inline bool IsFMAAvailable() {
56 return detector.fma_available_;
57 }
58 // Returns true if SSE4.1 is available on this system.
59 static inline bool IsSSEAvailable() {
60 return detector.sse_available_;
61 }
62 // Returns true if NEON is available on this system.
63 static inline bool IsNEONAvailable() {
64 return detector.neon_available_;
65 }
66 // Returns true if RVV is available on this system.
67 static inline bool IsRVVAvailable() {
68 return detector.rvv_available_;
69 }
70
71 // Update settings after config variable was set.
72 static TESS_API void Update();
73
74 private:
75 // Constructor, must set all static member variables.
76 SIMDDetect();
77
78 private:
79 // Singleton.
80 static SIMDDetect detector;
81 // If true, then AVX has been detected.
82 static TESS_API bool avx_available_;
83 static TESS_API bool avx2_available_;
84 static TESS_API bool avx512F_available_;
85 static TESS_API bool avx512BW_available_;
86 static TESS_API bool avx512VNNI_available_;
87 // If true, then FMA has been detected.
88 static TESS_API bool fma_available_;
89 // If true, then SSe4.1 has been detected.
90 static TESS_API bool sse_available_;
91 // If true, then NEON has been detected.
92 static TESS_API bool neon_available_;
93 // If true, then RVV has been detected.
94 static TESS_API bool rvv_available_;
95 };
96
97 } // namespace tesseract
98
99 #endif // TESSERACT_ARCH_SIMDDETECT_H_