ref: 2361f7543b3489a5d950425d816e014ff07fdcfe
dir: /codec/processing/src/arm64/down_sample_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
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*/
#ifdef HAVE_NEON_AARCH64
.text
#include "arm_arch64_common_macro.S"
WELS_ASM_AARCH64_FUNC_BEGIN DyadicBilinearDownsampler_AArch64_neon
//Initialize the register
mov x6, x2
mov x8, x0
mov w9, #0
lsr w5, w5, #1
//Save the tailer for the unasigned size
smaddl x7, w1, w5, x0
ld1 {v4.16b}, [x7]
add x7, x2, w3, sxtw
//processing a colume data
comp_ds_bilinear_loop0:
ld1 {v0.16b, v1.16b}, [x2], #32
ld1 {v2.16b, v3.16b}, [x7], #32
uaddlp v0.8h, v0.16b
uaddlp v1.8h, v1.16b
uaddlp v2.8h, v2.16b
uaddlp v3.8h, v3.16b
urshr v0.8h, v0.8h, #1
urshr v1.8h, v1.8h, #1
urshr v2.8h, v2.8h, #1
urshr v3.8h, v3.8h, #1
urhadd v0.8h, v0.8h, v2.8h
urhadd v1.8h, v1.8h, v3.8h
xtn v0.8b, v0.8h
xtn v1.8b, v1.8h
st1 {v0.8b, v1.8b}, [x0], #16
add w9, w9, #32
cmp w9, w4
b.cc comp_ds_bilinear_loop0
mov w9, #0
add x6, x6, w3, sxtw #1
mov x2, x6
add x7, x2, w3, sxtw
add x8, x8, w1, sxtw
mov x0, x8
sub w5, w5, #1
cbnz w5, comp_ds_bilinear_loop0
//restore the tailer for the unasigned size
st1 {v4.16b}, [x0]
WELS_ASM_AARCH64_FUNC_END
WELS_ASM_AARCH64_FUNC_BEGIN DyadicBilinearDownsamplerWidthx32_AArch64_neon
sub w9, w3, w4
sub w1, w1, w4, lsr #1
lsr w5, w5, #1
//processing a colume data
comp_ds_bilinear_w_x32_loop0:
lsr w6, w4, #5
add x7, x2, w3, sxtw
//processing a line data
comp_ds_bilinear_w_x32_loop1:
ld1 {v0.16b, v1.16b}, [x2], #32
ld1 {v2.16b, v3.16b}, [x7], #32
uaddlp v0.8h, v0.16b
uaddlp v1.8h, v1.16b
uaddlp v2.8h, v2.16b
uaddlp v3.8h, v3.16b
urshr v0.8h, v0.8h, #1
urshr v1.8h, v1.8h, #1
urshr v2.8h, v2.8h, #1
urshr v3.8h, v3.8h, #1
urhadd v0.8h, v0.8h, v2.8h
urhadd v1.8h, v1.8h, v3.8h
xtn v0.8b, v0.8h
xtn v1.8b, v1.8h
st1 {v0.8b, v1.8b}, [x0], #16
sub w6, w6, #1
cbnz w6, comp_ds_bilinear_w_x32_loop1
add x2, x7, w9, sxtw
add x0, x0, w1, sxtw
sub w5, w5, #1
cbnz w5, comp_ds_bilinear_w_x32_loop0
WELS_ASM_AARCH64_FUNC_END
WELS_ASM_AARCH64_FUNC_BEGIN GeneralBilinearAccurateDownsampler_AArch64_neon
mov w10, #32767
and w8, w6, w10
mov w11, #-1
mul w12, w11, w8
dup v2.4h, w8
dup v0.4h, w12
zip1 v0.4h, v0.4h, v2.4h // uinc -uinc uinc -uinc
and w9, w7, w10
mul w12, w11, w9
dup v2.4h, w9
dup v5.4h, w12
ins v5.s[1], v2.s[0] // vinc vinc -vinc -vinc
mov w11, #0x40000000
mov w12, #0x3FFF
add w11, w11, w12
dup v1.2s, w11 //init u 16384 16383 16384 16383
mov w8, #16384
dup v7.4h, w8
sub w11, w8, #1
dup v2.4h, w11
ins v7.s[0], v2.s[0] //init v 16384 16384 16383 16383
eor v26.16b, v26.16b, v26.16b
eor v27.16b, v27.16b, v27.16b
sub x1, x1, x2
sub x3, x3, #1
_HEIGHT:
lsr w11, w8, #15
mul w11, w11, w5
add x15, x4, w11, sxtw
add x12, x15, w5, sxtw
mov x9, #16384
sub x10, x2, #1
orr v6.8b, v1.8b, v1.8b
_WIDTH:
lsr x13, x9, #15
add x14, x15, x13
ld2 {v26.b, v27.b}[0], [x14] //q14: 0000000b0000000a;
add x14, x12, x13
ld2 {v26.b, v27.b}[4], [x14] //q14: 000d000b000c000a;
zip1 v28.2s, v26.2s, v27.2s
zip2 v29.2s, v26.2s, v27.2s
umull v20.4s, v6.4h, v7.4h
umull v21.2d, v28.2s, v20.2s
ins v20.d[0], v20.d[1]
umlal v21.2d, v29.2s, v20.2s
addp d21, v21.2d
urshr d21, d21, #30
st1 {v21.b}[0], [x0], #1
add x9, x9, x6
add v6.4h, v6.4h, v0.4h
shl v6.4h, v6.4h, #1
ushr v6.4h, v6.4h, #1
sub x10, x10, #1
cbnz x10, _WIDTH
WIDTH_END:
lsr x9, x9, #15
add x14, x15, x9
ld1 {v21.b}[0], [x14]
st1 {v21.b}[0], [x0], #1
add w8, w8, w7
add x0, x0, x1
add v7.4h, v7.4h, v5.4h
shl v7.4h, v7.4h, #1
ushr v7.4h, v7.4h, #1
sub x3, x3, #1
cbnz x3, _HEIGHT
LAST_ROW:
lsr w8, w8, #15
mul w8, w8, w5
add x4, x4, w8, sxtw
mov x9, #16384
_LAST_ROW_WIDTH:
mov x11, x9
lsr x11, x11, #15
add x3, x4, x11
ld1 {v21.b}[0], [x3]
st1 {v21.b}[0], [x0], #1
add x9, x9, x6
sub x2, x2, #1
cbnz x2, _LAST_ROW_WIDTH
WELS_ASM_AARCH64_FUNC_END
#endif