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/*
* Copyright (c) 2016-2020, 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 COPY_BYTES_H
#define COPY_BYTES_H
#include "unaligned.h"
#include "simd_utils.h"
static really_inline
void copy_upto_64_bytes(u8 *dst, const u8 *src, unsigned int len) {
switch (len) {
case 0:
break;
case 1:
*dst = *src;
break;
case 2:
unaligned_store_u16(dst, unaligned_load_u16(src));
break;
case 3:
unaligned_store_u16(dst, unaligned_load_u16(src));
dst[2] = src[2];
break;
case 4:
unaligned_store_u32(dst, unaligned_load_u32(src));
break;
case 5:
case 6:
case 7:
unaligned_store_u32(dst + len - 4, unaligned_load_u32(src + len - 4));
unaligned_store_u32(dst, unaligned_load_u32(src));
break;
case 8:
unaligned_store_u64a(dst, unaligned_load_u64a(src));
break;
case 9:
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
unaligned_store_u64a(dst + len - 8, unaligned_load_u64a(src + len - 8));
unaligned_store_u64a(dst, unaligned_load_u64a(src));
break;
case 16:
storeu128(dst, loadu128(src));
break;
case 17:
case 18:
case 19:
case 20:
case 21:
case 22:
case 23:
case 24:
case 25:
case 26:
case 27:
case 28:
case 29:
case 30:
case 31:
storeu128(dst + len - 16, loadu128(src + len - 16));
storeu128(dst, loadu128(src));
break;
case 32:
storeu256(dst, loadu256(src));
break;
#ifdef HAVE_AVX512
case 64:
storebytes512(dst, loadu512(src), 64);
break;
default:
assert(len < 64);
u64a k = (1ULL << len) - 1;
storeu_mask_m512(dst, k, loadu_maskz_m512(k, src));
break;
#else
default:
assert(0);
break;
#endif
}
}
#endif
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