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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /dom/base/nsTextFragmentGeneric.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | dom/base/nsTextFragmentGeneric.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/dom/base/nsTextFragmentGeneric.h b/dom/base/nsTextFragmentGeneric.h new file mode 100644 index 0000000000..407cfec0ea --- /dev/null +++ b/dom/base/nsTextFragmentGeneric.h @@ -0,0 +1,65 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef nsTextFragmentGeneric_h__ +#define nsTextFragmentGeneric_h__ + +#include "nsTextFragmentGenericFwd.h" + +#include "nscore.h" +#include "nsTextFragmentImpl.h" +#include <algorithm> + +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(); + const int32_t len = end - str; + int32_t i = 0; + + // Align ourselves to the Arch boundary + int32_t alignLen = std::min( + len, int32_t(((-NS_PTR_TO_INT32(str)) & (Arch::alignment() - 1)) / + sizeof(char16_t))); + for (; i < alignLen; i++) { + 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; + for (; i < wordWalkEnd; i += numUnicharsPerWord) { + const size_t word = *reinterpret_cast<const size_t*>(str + i); + if (word & mask) return i; + } + + // Take care of the remainder one character at a time. + for (; i < len; i++) { + if (str[i] > 255) { + return i; + } + } + + return -1; +} + +} // namespace mozilla + +#endif |