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/*
* Copyright (c) 2024 Zhao Zhili <quinkblack@foxmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/aarch64/asm.S"
#define VVC_MAX_PB_SIZE 128
function ff_vvc_sad_neon, export=1
src0 .req x0
src1 .req x1
dx .req w2
dy .req w3
block_w .req w4
block_h .req w5
sub w7, dx, #4
sub w8, dy, #4
add w6, dx, dy, lsl #7
add w7, w7, w8, lsl #7
sxtw x6, w6
sxtw x7, w7
add src0, src0, x6, lsl #1
sub src1, src1, x7, lsl #1
cmp block_w, #16
movi v16.4s, #0
b.ge 2f
1:
// block_w == 8
ldr q0, [src0]
ldr q2, [src1]
subs block_h, block_h, #2
sabal v16.4s, v0.4h, v2.4h
sabal2 v16.4s, v0.8h, v2.8h
add src0, src0, #(2 * VVC_MAX_PB_SIZE * 2)
add src1, src1, #(2 * VVC_MAX_PB_SIZE * 2)
b.ne 1b
b 4f
2:
// block_w == 16, no block_w > 16 according the spec
movi v17.4s, #0
3:
ldp q0, q1, [src0], #(2 * VVC_MAX_PB_SIZE * 2)
ldp q2, q3, [src1], #(2 * VVC_MAX_PB_SIZE * 2)
subs block_h, block_h, #2
sabal v16.4s, v0.4h, v2.4h
sabal2 v16.4s, v0.8h, v2.8h
sabal v17.4s, v1.4h, v3.4h
sabal2 v17.4s, v1.8h, v3.8h
b.ne 3b
add v16.4s, v16.4s, v17.4s
4:
addv s16, v16.4s
mov w0, v16.s[0]
ret
endfunc
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