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/*
* Copyright (C) 2021 rcombs
*
* This file is part of libass.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "asm.S"
/*
* void be_blur(uint8_t *buf, intptr_t stride,
* intptr_t width, intptr_t height, uint16_t *tmp);
*/
function be_blur_neon
sub x1, x1, x2
and x1, x1, ~15
mov x6, x0
mov x7, x4
movi v16.16b, 0
mov x9, x2
ld1 {v3.16b}, [x0], #16
ushll v4.8h, v3.8b, 0
ext v5.16b, v16.16b, v4.16b, 14
add v5.8h, v5.8h, v4.8h
ushll2 v0.8h, v3.16b, 0
b 1f
0:
ld1 {v3.16b}, [x0], #16
ushll v4.8h, v3.8b, 0
ext v5.16b, v0.16b, v4.16b, 14
add v5.8h, v5.8h, v4.8h
ushll2 v0.8h, v3.16b, 0
ext v3.16b, v1.16b, v5.16b, 2
add v3.8h, v3.8h, v1.8h
mov v2.8h, v3.8h
st1 {v2.8h, v3.8h}, [x4], #32
1:
ext v1.16b, v4.16b, v0.16b, 14
add v1.8h, v1.8h, v0.8h
ext v3.16b, v5.16b, v1.16b, 2
add v3.8h, v3.8h, v5.8h
mov v4.8h, v3.8h
st1 {v3.8h, v4.8h}, [x4], #32
subs x2, x2, 16
b.hi 0b
ext v0.16b, v0.16b, v16.16b, 14
ext v3.16b, v1.16b, v0.16b, 2
add v3.8h, v3.8h, v1.8h
mov v4.8h, v3.8h
st1 {v3.8h, v4.8h}, [x4], #32
add x0, x0, x1
subs x3, x3, 1
b.le 3f
0:
mov x4, x7
mov x2, x9
ld1 {v2.16b}, [x0], #16
ushll v4.8h, v2.8b, 0
ext v5.16b, v16.16b, v4.16b, 14
add v5.8h, v5.8h, v4.8h
ushll2 v0.8h, v2.16b, 0
b 2f
1:
ld1 {v2.16b}, [x0], #16
ushll v4.8h, v2.8b, 0
ext v5.16b, v0.16b, v4.16b, 14
add v5.8h, v5.8h, v4.8h
ushll2 v0.8h, v2.16b, 0
ext v2.16b, v1.16b, v5.16b, 2
add v6.8h, v2.8h, v1.8h
ld1 {v1.8h, v2.8h}, [x4]
add v7.8h, v1.8h, v6.8h
st1 {v6.8h, v7.8h}, [x4], #32
add v2.8h, v2.8h, v7.8h
uqshrn2 v3.16b, v2.8h, 4
st1 {v3.16b}, [x6], #16
2:
ext v1.16b, v4.16b, v0.16b, 14
add v1.8h, v1.8h, v0.8h
ext v2.16b, v5.16b, v1.16b, 2
add v2.8h, v2.8h, v5.8h
ld1 {v3.8h, v4.8h}, [x4]
add v3.8h, v3.8h, v2.8h
st1 {v2.8h, v3.8h}, [x4], #32
add v4.8h, v4.8h, v3.8h
uqshrn v3.8b, v4.8h, 4
subs x2, x2, 16
b.hi 1b
ext v0.16b, v0.16b, v16.16b, 14
ext v2.16b, v1.16b, v0.16b, 2
add v4.8h, v2.8h, v1.8h
ld1 {v0.8h, v1.8h}, [x4]
add v5.8h, v0.8h, v4.8h
st1 {v4.8h, v5.8h}, [x4], #32
add v1.8h, v1.8h, v5.8h
uqshrn2 v3.16b, v1.8h, 4
st1 {v3.16b}, [x6], #16
add x0, x0, x1
add x6, x6, x1
subs x3, x3, 1
b.hi 0b
3:
mov x2, x9
mov x4, x7
0:
ld1 {v2.8h, v3.8h, v4.8h, v5.8h}, [x4], #64
add v2.8h, v2.8h, v3.8h
uqshrn v2.8b, v2.8h, 4
add v3.8h, v4.8h, v5.8h
uqshrn2 v2.16b, v3.8h, 4
st1 {v2.16b}, [x6], #16
subs x2, x2, 16
b.hi 0b
ret
endfunc
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