--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/tesseract/src/arch/intsimdmatrixrvv.cpp	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,88 @@
+///////////////////////////////////////////////////////////////////////
+// File:        intsimdmatrixrvv.cpp
+// Description: matrix-vector product for 8-bit data on rvv.
+// Author:      sunyuechi
+//
+// Copyright (c) 2024 Institute of Software Chinese Academy of Sciences (ISCAS).
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
+#ifdef HAVE_CONFIG_H
+#  include "config_auto.h" // for HAVE_RVV, ...
+#endif
+
+#if HAVE_RVV
+#  include "intsimdmatrix.h"
+#  include "tesstypes.h"
+
+namespace tesseract {
+
+static int DotProduct(const int8_t *u, const int8_t *v, int num) {
+  int total = 0;
+
+  asm __volatile__ (
+    "  .option       arch, +v                   \n\t"
+    "  vsetvli t0,zero,e32,m8,ta,ma             \n\t"
+    "  vmv.v.i v0,0                             \n\t"
+    "1:                                         \n\t"
+    "  vsetvli t0,%[num],e8,m2,ta,ma            \n\t"
+    "  vle8.v v16,0(%[u])                       \n\t"
+    "  vle8.v v24,0(%[v])                       \n\t"
+    "  sub %[num],%[num],t0                     \n\t"
+    "  vwmul.vv v8,v24,v16                      \n\t"
+    "  add %[u],%[u],t0                         \n\t"
+    "  add %[v],%[v],t0                         \n\t"
+    "  vsetvli zero,zero,e16,m4,tu,ma           \n\t"
+    "  vwadd.wv v0,v0,v8                        \n\t"
+    "  bnez %[num],1b                           \n\t"
+    "  vsetvli t0,zero,e32,m8,ta,ma             \n\t"
+    "  vmv.s.x v8,zero                          \n\t"
+    "  vredsum.vs v0,v0,v8                      \n\t"
+    "  vmv.x.s %[total],v0                      \n\t"
+    :  [u] "+r" (u),
+       [v] "+r" (v),
+       [num] "+r" (num),
+       [total] "+r" (total)
+    :
+    :  "cc", "memory"
+  );
+
+  return total;
+}
+
+static void matrixDotVector(int dim1, int dim2, const int8_t *wi, const TFloat *scales,
+                            const int8_t *u, TFloat *v) {
+  int num_out = dim1;
+  int num_in = dim2 - 1;
+  for (int i = 0; i < num_out; ++i) {
+    const int8_t *wi_start = wi + i * dim2;
+    int total = DotProduct(wi_start, u, num_in);
+    // Add in the bias and apply scaling.
+    v[i] = (total + wi_start[num_in] * INT8_MAX) * scales[i];
+  }
+}
+
+const IntSimdMatrix IntSimdMatrix::intSimdMatrixRVV = {
+    // Function.
+    matrixDotVector,
+    // Number of 32 bit outputs held in each register.
+    1,
+    // Maximum number of registers that we will use to hold outputs.
+    1,
+    // Number of 8 bit inputs in the inputs register.
+    1,
+    // Number of inputs in each weight group.
+    1
+};
+
+} // namespace tesseract.
+
+#endif /* HAVE_RVV */