mirror of
https://github.com/VectorCamp/vectorscan.git
synced 2025-07-13 14:04:44 +03:00
74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/*
|
|
* Copyright (c) 2015-2017, Intel Corporation
|
|
* Copyright (c) 2020, 2021, VectorCamp PC
|
|
* Copyright (c) 2021, Arm Limited
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of Intel Corporation nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/** \file
|
|
* \brief Shufti: character class acceleration.
|
|
*
|
|
* Utilises the SSSE3 pshufb shuffle instruction
|
|
*/
|
|
|
|
#include "shufti.h"
|
|
#include "ue2common.h"
|
|
#include "util/arch.h"
|
|
#include "util/bitutils.h"
|
|
|
|
/** \brief Naive byte-by-byte implementation. */
|
|
static really_inline
|
|
const u8 *shuftiFwdSlow(const u8 *lo, const u8 *hi, const u8 *buf,
|
|
const u8 *buf_end) {
|
|
DEBUG_PRINTF("buf %p end %p \n", buf, buf_end);
|
|
for (; buf < buf_end; ++buf) {
|
|
u8 c = *buf;
|
|
if (lo[c & 0xf] & hi[c >> 4]) {
|
|
break;
|
|
}
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
/** \brief Naive byte-by-byte implementation. */
|
|
static really_inline
|
|
const u8 *shuftiRevSlow(const u8 *lo, const u8 *hi, const u8 *buf,
|
|
const u8 *buf_end) {
|
|
for (buf_end--; buf_end >= buf; buf_end--) {
|
|
u8 c = *buf_end;
|
|
if (lo[c & 0xf] & hi[c >> 4]) {
|
|
break;
|
|
}
|
|
}
|
|
return buf_end;
|
|
}
|
|
|
|
#ifdef HAVE_SVE
|
|
#include "shufti_sve.hpp"
|
|
#else
|
|
#include "shufti_simd.hpp"
|
|
#endif
|