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https://github.com/scummvm/scummvm.git
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Le Philousophe
f873a0ac02
The functions don't respect strict aliasing so this creates bugs in LTO builds. Use an alternative implementation which should be equivalent in terms of performance.
81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "common/memory.h"
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#include "common/util.h"
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namespace Common {
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template<typename T>
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static inline void memsetXX(T *dst, T val, size_t count) {
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while(count >= 8) {
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dst[0] = val;
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dst[1] = val;
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dst[2] = val;
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dst[3] = val;
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dst[4] = val;
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dst[5] = val;
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dst[6] = val;
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dst[7] = val;
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dst += 8;
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count -= 8;
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}
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switch(count) {
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case 7:
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*(dst++) = val;
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/* fall through */
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case 6:
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*(dst++) = val;
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/* fall through */
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case 5:
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*(dst++) = val;
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/* fall through */
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case 4:
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*(dst++) = val;
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/* fall through */
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case 3:
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*(dst++) = val;
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/* fall through */
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case 2:
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*(dst++) = val;
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/* fall through */
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case 1:
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*(dst++) = val;
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/* fall through */
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case 0:
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break;
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}
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}
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void memset64(uint64 *dst, uint64 val, size_t count) {
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memsetXX<uint64>(dst, val, count);
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}
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void memset32(uint32 *dst, uint32 val, size_t count) {
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memsetXX<uint32>(dst, val, count);
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}
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void memset16(uint16 *dst, uint16 val, size_t count) {
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memsetXX<uint16>(dst, val, count);
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}
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} // End of namespace Common
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