Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/arch/intsimdmatrixrvv.cpp @ 40:aa33339d6b8a upstream

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ADD: MuPDF v1.26.10: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.5.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 11:31:38 +0200
parents b50eed0cc0ef
children
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: intsimdmatrixrvv.cpp
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3 // Description: matrix-vector product for 8-bit data on rvv.
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4 // Author: sunyuechi
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5 //
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6 // Copyright (c) 2024 Institute of Software Chinese Academy of Sciences (ISCAS).
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7 // Licensed under the Apache License, Version 2.0 (the "License");
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8 // you may not use this file except in compliance with the License.
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9 // You may obtain a copy of the License at
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10 // http://www.apache.org/licenses/LICENSE-2.0
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11 // Unless required by applicable law or agreed to in writing, software
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12 // distributed under the License is distributed on an "AS IS" BASIS,
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13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 // See the License for the specific language governing permissions and
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15 // limitations under the License.
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16 ///////////////////////////////////////////////////////////////////////
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18 #ifdef HAVE_CONFIG_H
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19 # include "config_auto.h" // for HAVE_RVV, ...
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20 #endif
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22 #if HAVE_RVV
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23 # include "intsimdmatrix.h"
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24 # include "tesstypes.h"
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26 namespace tesseract {
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27
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28 static int DotProduct(const int8_t *u, const int8_t *v, int num) {
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29 int total = 0;
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30
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31 asm __volatile__ (
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32 " .option arch, +v \n\t"
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33 " vsetvli t0,zero,e32,m8,ta,ma \n\t"
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34 " vmv.v.i v0,0 \n\t"
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35 "1: \n\t"
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36 " vsetvli t0,%[num],e8,m2,ta,ma \n\t"
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37 " vle8.v v16,0(%[u]) \n\t"
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38 " vle8.v v24,0(%[v]) \n\t"
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39 " sub %[num],%[num],t0 \n\t"
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40 " vwmul.vv v8,v24,v16 \n\t"
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41 " add %[u],%[u],t0 \n\t"
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42 " add %[v],%[v],t0 \n\t"
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43 " vsetvli zero,zero,e16,m4,tu,ma \n\t"
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44 " vwadd.wv v0,v0,v8 \n\t"
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45 " bnez %[num],1b \n\t"
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46 " vsetvli t0,zero,e32,m8,ta,ma \n\t"
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47 " vmv.s.x v8,zero \n\t"
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48 " vredsum.vs v0,v0,v8 \n\t"
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49 " vmv.x.s %[total],v0 \n\t"
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50 : [u] "+r" (u),
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51 [v] "+r" (v),
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52 [num] "+r" (num),
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53 [total] "+r" (total)
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54 :
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55 : "cc", "memory"
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56 );
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57
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58 return total;
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59 }
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60
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61 static void matrixDotVector(int dim1, int dim2, const int8_t *wi, const TFloat *scales,
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62 const int8_t *u, TFloat *v) {
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63 int num_out = dim1;
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64 int num_in = dim2 - 1;
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65 for (int i = 0; i < num_out; ++i) {
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66 const int8_t *wi_start = wi + i * dim2;
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67 int total = DotProduct(wi_start, u, num_in);
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68 // Add in the bias and apply scaling.
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69 v[i] = (total + wi_start[num_in] * INT8_MAX) * scales[i];
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70 }
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71 }
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72
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73 const IntSimdMatrix IntSimdMatrix::intSimdMatrixRVV = {
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74 // Function.
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75 matrixDotVector,
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76 // Number of 32 bit outputs held in each register.
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77 1,
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78 // Maximum number of registers that we will use to hold outputs.
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79 1,
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80 // Number of 8 bit inputs in the inputs register.
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81 1,
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82 // Number of inputs in each weight group.
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83 1
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84 };
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85
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86 } // namespace tesseract.
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87
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88 #endif /* HAVE_RVV */