ref: 17139510a354b3f5aec036b8d583d188cb04aa10
dir: /codec/processing/src/arm/pixel_sad_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
#include "arm_arch_common_macro.S"
WELS_ASM_FUNC_BEGIN WelsProcessingSampleSad8x8_neon
stmdb sp!, {lr}
//Loading a horizontal line data (8 bytes)
vld1.8 {d0}, [r0], r1
vld1.8 {d1}, [r2], r3
//Do the SAD for 8 bytes
vabdl.u8 q1, d0, d1
mov lr, #7
pixel_sad_8x8_loop0:
//Loading a horizontal line data (8 bytes)
vld1.8 {d0}, [r0], r1
vld1.8 {d1}, [r2], r3
subs lr, #1
//Do the SAD for 8 bytes
vabal.u8 q1, d0, d1
bne pixel_sad_8x8_loop0
vadd.u16 d2, d3
vpaddl.u16 d2, d2
vpaddl.u32 d2, d2
vmov.u32 r0, d2[0]//TBO...
ldmia sp!, {lr}
WELS_ASM_FUNC_END
#endif