ref: 5c8cbec43347f61f256dce7d1ad227183dc7d0b4
dir: /codec/processing/src/arm64/pixel_sad_aarch64_neon.S/
/*!
* \copy
* Copyright (c) 2013, Cisco Systems
* All rights reserved.
*
* 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.
*
* 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 HOLDER 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.
*
*/
#ifdef HAVE_NEON_AARCH64
#include "arm_arch64_common_macro.S"
//int32_t WelsProcessingSampleSad8x8_AArch64_neon (uint8_t*, int32_t, uint8_t*, int32_t);
WELS_ASM_AARCH64_FUNC_BEGIN WelsProcessingSampleSad8x8_AArch64_neon
SIGN_EXTENSION x1, w1
SIGN_EXTENSION x3, w3
ld1 {v0.8b}, [x0], x1
ld1 {v1.8b}, [x2], x3
uabdl v2.8h, v0.8b, v1.8b
.rept 7
ld1 {v0.8b}, [x0], x1
ld1 {v1.8b}, [x2], x3
uabal v2.8h, v0.8b, v1.8b
.endr
saddlv s2, v2.8h
fmov w0, s2
WELS_ASM_AARCH64_FUNC_END
#endif