--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/tesseract/src/arch/dotproductavx512.cpp	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,70 @@
+///////////////////////////////////////////////////////////////////////
+// File:        dotproductavx512.cpp
+// Description: Architecture-specific dot-product function.
+// Author:      Stefan Weil
+//
+// (C) Copyright 2022
+// 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.
+///////////////////////////////////////////////////////////////////////
+
+#if !defined(__AVX__)
+#  if defined(__i686__) || defined(__x86_64__)
+#    error Implementation only for AVX capable architectures
+#  endif
+#else
+
+#  include <immintrin.h>
+#  include <cstdint>
+#  include "dotproduct.h"
+
+namespace tesseract {
+
+// Computes and returns the dot product of the n-vectors u and v.
+// Uses Intel AVX intrinsics to access the SIMD instruction set.
+#  if defined(FAST_FLOAT)
+float DotProductAVX512F(const float *u, const float *v, int n) {
+  const unsigned quot = n / 16;
+  const unsigned rem = n % 16;
+  __m512 t0 = _mm512_setzero_ps();
+  for (unsigned k = 0; k < quot; k++) {
+    __m512 f0 = _mm512_loadu_ps(u);
+    __m512 f1 = _mm512_loadu_ps(v);
+    t0 = _mm512_fmadd_ps(f0, f1, t0);
+    u += 16;
+    v += 16;
+  }
+  float result = _mm512_reduce_add_ps(t0);
+  for (unsigned k = 0; k < rem; k++) {
+    result += *u++ * *v++;
+  }
+  return result;
+}
+#  else
+double DotProductAVX512F(const double *u, const double *v, int n) {
+  const unsigned quot = n / 8;
+  const unsigned rem = n % 8;
+  __m512d t0 = _mm512_setzero_pd();
+  for (unsigned k = 0; k < quot; k++) {
+    t0 = _mm512_fmadd_pd(_mm512_loadu_pd(u), _mm512_loadu_pd(v), t0);
+    u += 8;
+    v += 8;
+  }
+  double result = _mm512_reduce_add_pd(t0);
+  for (unsigned k = 0; k < rem; k++) {
+    result += *u++ * *v++;
+  }
+  return result;
+}
+#  endif
+
+} // namespace tesseract.
+
+#endif