Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/arch/dotproductneon.cpp @ 17:dd9cdb856310

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Remove PKG-INFO from the because it is regenerated automatically for the sdist
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 17:40:40 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: dotproductneon.cpp
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3 // Description: Dot product function for ARM NEON.
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4 // Author: Stefan Weil
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5 //
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6 // Licensed under the Apache License, Version 2.0 (the "License");
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7 // you may not use this file except in compliance with the License.
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8 // You may obtain a copy of the License at
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9 // http://www.apache.org/licenses/LICENSE-2.0
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10 // Unless required by applicable law or agreed to in writing, software
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11 // distributed under the License is distributed on an "AS IS" BASIS,
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12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 // See the License for the specific language governing permissions and
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14 // limitations under the License.
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15 ///////////////////////////////////////////////////////////////////////
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17 #if defined(__ARM_NEON)
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19 #include <arm_neon.h>
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20 #include "dotproduct.h"
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22 namespace tesseract {
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23
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24 // Documentation:
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25 // https://developer.arm.com/architectures/instruction-sets/intrinsics/
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27 #if defined(FAST_FLOAT) && defined(__ARM_ARCH_ISA_A64)
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29 float DotProductNEON(const float *u, const float *v, int n) {
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30 float32x4_t result0123 = vdupq_n_f32(0.0f);
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31 float32x4_t result4567 = vdupq_n_f32(0.0f);
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32 while (n > 7) {
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33 // Calculate 8 dot products per iteration.
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34 float32x4_t u0 = vld1q_f32(u);
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35 float32x4_t v0 = vld1q_f32(v);
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36 float32x4_t u4 = vld1q_f32(u + 4);
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37 float32x4_t v4 = vld1q_f32(v + 4);
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38 result0123 = vfmaq_f32(result0123, u0, v0);
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39 result4567 = vfmaq_f32(result4567, u4, v4);
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40 u += 8;
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41 v += 8;
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42 n -= 8;
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43 }
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44 float total = vaddvq_f32(result0123);
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45 total += vaddvq_f32(result4567);
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46 while (n > 0) {
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47 total += *u++ * *v++;
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48 n--;
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49 }
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50 return total;
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51 }
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52
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53 #else
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54
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55 // Computes and returns the dot product of the two n-vectors u and v.
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56 TFloat DotProductNEON(const TFloat *u, const TFloat *v, int n) {
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57 TFloat total = 0;
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58 #if defined(OPENMP_SIMD) || defined(_OPENMP)
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59 #pragma omp simd reduction(+:total)
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60 #endif
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61 for (int k = 0; k < n; k++) {
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62 total += u[k] * v[k];
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63 }
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64 return total;
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65 }
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66
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67 #endif
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68
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69 } // namespace tesseract
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71 #endif /* __ARM_NEON */