2 files changed, 40 insertions, 0 deletions
diff --git a/extra/firefox/PKGBUILD b/extra/firefox/PKGBUILD
index b5dc7982..172abdf7 100644
--- a/extra/firefox/PKGBUILD
+++ b/extra/firefox/PKGBUILD
@@ -248,3 +248,14 @@ eval "$(
       $ i patch -p1 -i "$srcdir/fix-i686-build-moz-1792159.patch"
     '
 )"
+
+# from Parabola (thanks go to bill-auger)
+source+=('fix-i686-xsimd-incomplete.patch')
+sha256sums+=('c3ce181fbb0142055aa6dd17f3cda2ba6a1e54d7a689a8c6e9cce76aa40e6544')
+b2sums+=('3e6fd4cebe0fd4c250ccf5b04e12b93e5f4cc2d139301316c987cc07a57b4b6b49b830d745520a82f5ac59da8d17f728a3ecce4dccf21804a2d6a256a6f76472')
+eval "$(
+  declare -f prepare | \
+    sed '
+      $ i patch -p1 -i "$srcdir/fix-i686-xsimd-incomplete.patch"
+    '
+)"
diff --git a/extra/firefox/fix-i686-xsimd-incomplete.patch b/extra/firefox/fix-i686-xsimd-incomplete.patch
new file mode 100644
index 00000000..c0df0054
--- /dev/null
+++ b/extra/firefox/fix-i686-xsimd-incomplete.patch
@@ -0,0 +1,29 @@
+diff --git a/dom/base/nsTextFragmentGeneric.h b/dom/base/nsTextFragmentGeneric.h
+index 10e16fcfaa..87d9e0d075 100644
+--- a/dom/base/nsTextFragmentGeneric.h
++++ b/dom/base/nsTextFragmentGeneric.h
+@@ -13,7 +13,6 @@ namespace mozilla {
+ 
+ template <class Arch>
+ int32_t FirstNon8Bit(const char16_t* str, const char16_t* end) {
+-  const uint32_t numUnicharsPerVector = xsimd::batch<int16_t, Arch>::size;
+   using p = Non8BitParameters<sizeof(size_t)>;
+   const size_t mask = p::mask();
+   const uint32_t numUnicharsPerWord = p::numUnicharsPerWord();
+@@ -28,16 +27,6 @@ int32_t FirstNon8Bit(const char16_t* str, const char16_t* end) {
+     if (str[i] > 255) return i;
+   }
+ 
+-  // Check one batch at a time.
+-  const int32_t vectWalkEnd =
+-      ((len - i) / numUnicharsPerVector) * numUnicharsPerVector;
+-  const uint16_t shortMask = 0xff00;
+-  xsimd::batch<int16_t, Arch> vectmask(static_cast<int16_t>(shortMask));
+-  for (; i < vectWalkEnd; i += numUnicharsPerVector) {
+-    const auto vect = xsimd::batch<int16_t, Arch>::load_aligned(str + i);
+-    if (xsimd::any((vect & vectmask) != 0)) return i;
+-  }
+-
+   // Check one word at a time.
+   const int32_t wordWalkEnd =
+       ((len - i) / numUnicharsPerWord) * numUnicharsPerWord;