/* -*- 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/. */ #include <stdint.h> namespace mozilla { inline bool IsASCII(char16_t aChar) { return (aChar & 0xFF80) == 0; } /** * Provides a pointer before or equal to |aPtr| that is is suitably aligned. */ inline const char16_t* aligned(const char16_t* aPtr, const uintptr_t aMask) { return reinterpret_cast<const char16_t*>( reinterpret_cast<uintptr_t>(aPtr) & ~aMask); } /** * Structures for word-sized vectorization of ASCII checking for UTF-16 * strings. */ template<size_t size> struct NonASCIIParameters; template<> struct NonASCIIParameters<4> { static inline size_t mask() { return 0xff80ff80; } static inline uintptr_t alignMask() { return 0x3; } static inline size_t numUnicharsPerWord() { return 2; } }; template<> struct NonASCIIParameters<8> { static inline size_t mask() { static const uint64_t maskAsUint64 = UINT64_C(0xff80ff80ff80ff80); // We have to explicitly cast this 64-bit value to a size_t, or else // compilers for 32-bit platforms will warn about it being too large to fit // in the size_t return type. (Fortunately, this code isn't actually // invoked on 32-bit platforms -- they'll use the <4> specialization above. // So it is, in fact, OK that this value is too large for a 32-bit size_t.) return (size_t)maskAsUint64; } static inline uintptr_t alignMask() { return 0x7; } static inline size_t numUnicharsPerWord() { return 4; } }; namespace SSE2 { int32_t FirstNonASCII(const char16_t* aBegin, const char16_t* aEnd); } // namespace SSE2 } // namespace mozilla