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/*
* Copyright (c) 2015-2017, Intel Corporation
*
* 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.
*/
#ifndef MASKED_MOVE_H
#define MASKED_MOVE_H
#include "arch.h"
#if defined(HAVE_AVX2)
#include "unaligned.h"
#include "simd_utils.h"
#ifdef __cplusplus
extern "C" {
#endif
extern const u32 mm_mask_mask[16];
extern const u32 mm_shuffle_end[32][8];
#ifdef __cplusplus
}
#endif
/* load mask for len bytes from start of buffer */
static really_inline m256
_get_mm_mask_end(u32 len) {
assert(len <= 32);
const u8 *masky = (const u8 *)mm_mask_mask;
m256 mask = load256(masky + 32);
mask = _mm256_sll_epi32(mask, _mm_cvtsi32_si128(8 - (len >> 2)));
return mask;
}
/*
* masked_move256_len: Will load len bytes from *buf into m256
* _______________________________
* |0<----len---->| 32|
* -------------------------------
*/
static really_inline m256
masked_move256_len(const u8 *buf, const u32 len) {
assert(len >= 4);
m256 lmask = _get_mm_mask_end(len);
u32 end = unaligned_load_u32(buf + len - 4);
m256 preshufend = _mm256_broadcastq_epi64(_mm_cvtsi32_si128(end));
m256 v = _mm256_maskload_epi32((const int *)buf, lmask);
m256 shufend = pshufb_m256(preshufend,
loadu256(&mm_shuffle_end[len - 4]));
m256 target = or256(v, shufend);
return target;
}
#endif /* AVX2 */
#endif /* MASKED_MOVE_H */
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