ref: 1f83575018b39d12410407dc08bdc9c445504406
dir: /src/arm/64/ipred.S/
/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2019, Martin Storsjo
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. 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 OWNER 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.
*/
#include "src/arm/asm.S"
#include "util.S"
// void ipred_dc_128_neon(pixel *dst, const ptrdiff_t stride,
// const pixel *const topleft,
// const int width, const int height, const int a,
// const int max_width, const int max_height);
function ipred_dc_128_neon, export=1
clz w3, w3
adr x5, L(ipred_dc_128_tbl)
sub w3, w3, #25
ldrh w3, [x5, w3, uxtw #1]
movi v0.16b, #128
sub x5, x5, w3, uxtw
add x6, x0, x1
lsl x1, x1, #1
br x5
4:
st1 {v0.s}[0], [x0], x1
st1 {v0.s}[0], [x6], x1
subs w4, w4, #4
st1 {v0.s}[0], [x0], x1
st1 {v0.s}[0], [x6], x1
b.gt 4b
ret
8:
st1 {v0.8b}, [x0], x1
st1 {v0.8b}, [x6], x1
subs w4, w4, #4
st1 {v0.8b}, [x0], x1
st1 {v0.8b}, [x6], x1
b.gt 8b
ret
16:
st1 {v0.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
b.gt 16b
ret
320:
movi v1.16b, #128
32:
st1 {v0.16b, v1.16b}, [x0], x1
st1 {v0.16b, v1.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b, v1.16b}, [x0], x1
st1 {v0.16b, v1.16b}, [x6], x1
b.gt 32b
ret
640:
movi v1.16b, #128
movi v2.16b, #128
movi v3.16b, #128
64:
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], x1
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], x1
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x6], x1
b.gt 64b
ret
L(ipred_dc_128_tbl):
.hword L(ipred_dc_128_tbl) - 640b
.hword L(ipred_dc_128_tbl) - 320b
.hword L(ipred_dc_128_tbl) - 16b
.hword L(ipred_dc_128_tbl) - 8b
.hword L(ipred_dc_128_tbl) - 4b
endfunc
// void ipred_v_neon(pixel *dst, const ptrdiff_t stride,
// const pixel *const topleft,
// const int width, const int height, const int a,
// const int max_width, const int max_height);
function ipred_v_neon, export=1
clz w3, w3
adr x5, L(ipred_v_tbl)
sub w3, w3, #25
ldrh w3, [x5, w3, uxtw #1]
add x2, x2, #1
sub x5, x5, w3, uxtw
add x6, x0, x1
lsl x1, x1, #1
br x5
40:
ld1 {v0.s}[0], [x2]
4:
st1 {v0.s}[0], [x0], x1
st1 {v0.s}[0], [x6], x1
subs w4, w4, #4
st1 {v0.s}[0], [x0], x1
st1 {v0.s}[0], [x6], x1
b.gt 4b
ret
80:
ld1 {v0.8b}, [x2]
8:
st1 {v0.8b}, [x0], x1
st1 {v0.8b}, [x6], x1
subs w4, w4, #4
st1 {v0.8b}, [x0], x1
st1 {v0.8b}, [x6], x1
b.gt 8b
ret
160:
ld1 {v0.16b}, [x2], #16
16:
st1 {v0.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
b.gt 16b
ret
320:
ld1 {v0.16b, v1.16b}, [x2]
32:
st1 {v0.16b, v1.16b}, [x0], x1
st1 {v0.16b, v1.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b, v1.16b}, [x0], x1
st1 {v0.16b, v1.16b}, [x6], x1
b.gt 32b
ret
640:
ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x2]
64:
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], x1
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], x1
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x6], x1
b.gt 64b
ret
L(ipred_v_tbl):
.hword L(ipred_v_tbl) - 640b
.hword L(ipred_v_tbl) - 320b
.hword L(ipred_v_tbl) - 160b
.hword L(ipred_v_tbl) - 80b
.hword L(ipred_v_tbl) - 40b
endfunc
// void ipred_h_neon(pixel *dst, const ptrdiff_t stride,
// const pixel *const topleft,
// const int width, const int height, const int a,
// const int max_width, const int max_height);
function ipred_h_neon, export=1
clz w3, w3
adr x5, L(ipred_h_tbl)
sub w3, w3, #25
ldrh w3, [x5, w3, uxtw #1]
sub x2, x2, #4
sub x5, x5, w3, uxtw
mov x7, #-4
add x6, x0, x1
lsl x1, x1, #1
br x5
4:
ld4r {v0.8b, v1.8b, v2.8b, v3.8b}, [x2], x7
st1 {v3.s}[0], [x0], x1
st1 {v2.s}[0], [x6], x1
subs w4, w4, #4
st1 {v1.s}[0], [x0], x1
st1 {v0.s}[0], [x6], x1
b.gt 4b
ret
8:
ld4r {v0.8b, v1.8b, v2.8b, v3.8b}, [x2], x7
st1 {v3.8b}, [x0], x1
st1 {v2.8b}, [x6], x1
subs w4, w4, #4
st1 {v1.8b}, [x0], x1
st1 {v0.8b}, [x6], x1
b.gt 8b
ret
16:
ld4r {v0.16b, v1.16b, v2.16b, v3.16b}, [x2], x7
st1 {v3.16b}, [x0], x1
st1 {v2.16b}, [x6], x1
subs w4, w4, #4
st1 {v1.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
b.gt 16b
ret
32:
ld4r {v0.16b, v1.16b, v2.16b, v3.16b}, [x2], x7
str q3, [x0, #16]
str q2, [x6, #16]
st1 {v3.16b}, [x0], x1
st1 {v2.16b}, [x6], x1
subs w4, w4, #4
str q1, [x0, #16]
str q0, [x6, #16]
st1 {v1.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
b.gt 32b
ret
64:
ld4r {v0.16b, v1.16b, v2.16b, v3.16b}, [x2], x7
str q3, [x0, #16]
str q2, [x6, #16]
stp q3, q3, [x0, #32]
stp q2, q2, [x6, #32]
st1 {v3.16b}, [x0], x1
st1 {v2.16b}, [x6], x1
subs w4, w4, #4
str q1, [x0, #16]
str q0, [x6, #16]
stp q1, q1, [x0, #32]
stp q0, q0, [x6, #32]
st1 {v1.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
b.gt 64b
ret
L(ipred_h_tbl):
.hword L(ipred_h_tbl) - 64b
.hword L(ipred_h_tbl) - 32b
.hword L(ipred_h_tbl) - 16b
.hword L(ipred_h_tbl) - 8b
.hword L(ipred_h_tbl) - 4b
endfunc
// void ipred_dc_top_neon(pixel *dst, const ptrdiff_t stride,
// const pixel *const topleft,
// const int width, const int height, const int a,
// const int max_width, const int max_height);
function ipred_dc_top_neon, export=1
clz w3, w3
adr x5, L(ipred_dc_top_tbl)
sub w3, w3, #25
ldrh w3, [x5, w3, uxtw #1]
add x2, x2, #1
sub x5, x5, w3, uxtw
add x6, x0, x1
lsl x1, x1, #1
br x5
40:
ld1r {v0.2s}, [x2]
uaddlv h0, v0.8b
rshrn v0.8b, v0.8h, #3
dup v0.8b, v0.b[0]
4:
st1 {v0.s}[0], [x0], x1
st1 {v0.s}[0], [x6], x1
subs w4, w4, #4
st1 {v0.s}[0], [x0], x1
st1 {v0.s}[0], [x6], x1
b.gt 4b
ret
80:
ld1 {v0.8b}, [x2]
uaddlv h0, v0.8b
rshrn v0.8b, v0.8h, #3
dup v0.8b, v0.b[0]
8:
st1 {v0.8b}, [x0], x1
st1 {v0.8b}, [x6], x1
subs w4, w4, #4
st1 {v0.8b}, [x0], x1
st1 {v0.8b}, [x6], x1
b.gt 8b
ret
160:
ld1 {v0.16b}, [x2]
uaddlv h0, v0.16b
rshrn v0.8b, v0.8h, #4
dup v0.16b, v0.b[0]
16:
st1 {v0.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
b.gt 16b
ret
320:
ld1 {v0.16b, v1.16b}, [x2]
uaddlv h0, v0.16b
uaddlv h1, v1.16b
add v2.4h, v0.4h, v1.4h
rshrn v2.8b, v2.8h, #5
dup v0.16b, v2.b[0]
dup v1.16b, v2.b[0]
32:
st1 {v0.16b, v1.16b}, [x0], x1
st1 {v0.16b, v1.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b, v1.16b}, [x0], x1
st1 {v0.16b, v1.16b}, [x6], x1
b.gt 32b
ret
640:
ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x2]
uaddlv h0, v0.16b
uaddlv h1, v1.16b
uaddlv h2, v2.16b
uaddlv h3, v3.16b
add v4.4h, v0.4h, v1.4h
add v5.4h, v2.4h, v3.4h
add v4.4h, v4.4h, v5.4h
rshrn v4.8b, v4.8h, #6
dup v0.16b, v4.b[0]
dup v1.16b, v4.b[0]
dup v2.16b, v4.b[0]
dup v3.16b, v4.b[0]
64:
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], x1
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], x1
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x6], x1
b.gt 64b
ret
L(ipred_dc_top_tbl):
.hword L(ipred_dc_top_tbl) - 640b
.hword L(ipred_dc_top_tbl) - 320b
.hword L(ipred_dc_top_tbl) - 160b
.hword L(ipred_dc_top_tbl) - 80b
.hword L(ipred_dc_top_tbl) - 40b
endfunc
// void ipred_dc_left_neon(pixel *dst, const ptrdiff_t stride,
// const pixel *const topleft,
// const int width, const int height, const int a,
// const int max_width, const int max_height);
function ipred_dc_left_neon, export=1
sub x2, x2, w4, uxtw
clz w3, w3
clz w7, w4
adr x5, L(ipred_dc_left_tbl)
sub w3, w3, #20 // 25 leading bits, minus table offset 5
sub w7, w7, #25
ldrh w3, [x5, w3, uxtw #1]
ldrh w7, [x5, w7, uxtw #1]
sub x3, x5, w3, uxtw
sub x5, x5, w7, uxtw
add x6, x0, x1
lsl x1, x1, #1
br x5
L(ipred_dc_left_h4):
ld1r {v0.2s}, [x2]
uaddlv h0, v0.8b
rshrn v0.8b, v0.8h, #3
dup v0.16b, v0.b[0]
br x3
L(ipred_dc_left_w4):
st1 {v0.s}[0], [x0], x1
st1 {v0.s}[0], [x6], x1
subs w4, w4, #4
st1 {v0.s}[0], [x0], x1
st1 {v0.s}[0], [x6], x1
b.gt L(ipred_dc_left_w4)
ret
L(ipred_dc_left_h8):
ld1 {v0.8b}, [x2]
uaddlv h0, v0.8b
rshrn v0.8b, v0.8h, #3
dup v0.16b, v0.b[0]
br x3
L(ipred_dc_left_w8):
st1 {v0.8b}, [x0], x1
st1 {v0.8b}, [x6], x1
subs w4, w4, #4
st1 {v0.8b}, [x0], x1
st1 {v0.8b}, [x6], x1
b.gt L(ipred_dc_left_w8)
ret
L(ipred_dc_left_h16):
ld1 {v0.16b}, [x2]
uaddlv h0, v0.16b
rshrn v0.8b, v0.8h, #4
dup v0.16b, v0.b[0]
br x3
L(ipred_dc_left_w16):
st1 {v0.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
b.gt L(ipred_dc_left_w16)
ret
L(ipred_dc_left_h32):
ld1 {v0.16b, v1.16b}, [x2]
uaddlv h0, v0.16b
uaddlv h1, v1.16b
add v0.4h, v0.4h, v1.4h
rshrn v0.8b, v0.8h, #5
dup v0.16b, v0.b[0]
br x3
L(ipred_dc_left_w32):
mov v1.16b, v0.16b
1:
st1 {v0.16b, v1.16b}, [x0], x1
st1 {v0.16b, v1.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b, v1.16b}, [x0], x1
st1 {v0.16b, v1.16b}, [x6], x1
b.gt 1b
ret
L(ipred_dc_left_h64):
ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x2]
uaddlv h0, v0.16b
uaddlv h1, v1.16b
uaddlv h2, v2.16b
uaddlv h3, v3.16b
add v0.4h, v0.4h, v1.4h
add v2.4h, v2.4h, v3.4h
add v0.4h, v0.4h, v2.4h
rshrn v0.8b, v0.8h, #6
dup v0.16b, v0.b[0]
br x3
L(ipred_dc_left_w64):
mov v1.16b, v0.16b
mov v2.16b, v0.16b
mov v3.16b, v0.16b
1:
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], x1
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], x1
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x6], x1
b.gt 1b
ret
L(ipred_dc_left_tbl):
.hword L(ipred_dc_left_tbl) - L(ipred_dc_left_h64)
.hword L(ipred_dc_left_tbl) - L(ipred_dc_left_h32)
.hword L(ipred_dc_left_tbl) - L(ipred_dc_left_h16)
.hword L(ipred_dc_left_tbl) - L(ipred_dc_left_h8)
.hword L(ipred_dc_left_tbl) - L(ipred_dc_left_h4)
.hword L(ipred_dc_left_tbl) - L(ipred_dc_left_w64)
.hword L(ipred_dc_left_tbl) - L(ipred_dc_left_w32)
.hword L(ipred_dc_left_tbl) - L(ipred_dc_left_w16)
.hword L(ipred_dc_left_tbl) - L(ipred_dc_left_w8)
.hword L(ipred_dc_left_tbl) - L(ipred_dc_left_w4)
endfunc
// void ipred_dc_neon(pixel *dst, const ptrdiff_t stride,
// const pixel *const topleft,
// const int width, const int height, const int a,
// const int max_width, const int max_height);
function ipred_dc_neon, export=1
sub x2, x2, w4, uxtw
add w7, w3, w4 // width + height
clz w3, w3
clz w6, w4
dup v16.8h, w7 // width + height
adr x5, L(ipred_dc_tbl)
rbit w7, w7 // rbit(width + height)
sub w3, w3, #20 // 25 leading bits, minus table offset 5
sub w6, w6, #25
clz w7, w7 // ctz(width + height)
ldrh w3, [x5, w3, uxtw #1]
ldrh w6, [x5, w6, uxtw #1]
neg w7, w7 // -ctz(width + height)
sub x3, x5, w3, uxtw
sub x5, x5, w6, uxtw
ushr v16.8h, v16.8h, #1 // (width + height) >> 1
dup v17.8h, w7 // -ctz(width + height)
add x6, x0, x1
lsl x1, x1, #1
br x5
L(ipred_dc_h4):
ld1 {v0.s}[0], [x2], #4
ins v0.s[1], wzr
uaddlv h0, v0.8b
br x3
L(ipred_dc_w4):
add x2, x2, #1
ld1 {v1.s}[0], [x2]
ins v1.s[1], wzr
add v0.4h, v0.4h, v16.4h
uaddlv h1, v1.8b
cmp w4, #4
add v0.4h, v0.4h, v1.4h
ushl v0.4h, v0.4h, v17.4h
b.eq 1f
// h = 8/16
mov w16, #(0x3334/2)
movk w16, #(0x5556/2), lsl #16
add w17, w4, w4 // w17 = 2*h = 16 or 32
lsr w16, w16, w17
dup v16.4h, w16
sqdmulh v0.4h, v0.4h, v16.4h
1:
dup v0.8b, v0.b[0]
2:
st1 {v0.s}[0], [x0], x1
st1 {v0.s}[0], [x6], x1
subs w4, w4, #4
st1 {v0.s}[0], [x0], x1
st1 {v0.s}[0], [x6], x1
b.gt 2b
ret
L(ipred_dc_h8):
ld1 {v0.8b}, [x2], #8
uaddlv h0, v0.8b
br x3
L(ipred_dc_w8):
add x2, x2, #1
ld1 {v1.8b}, [x2]
add v0.4h, v0.4h, v16.4h
uaddlv h1, v1.8b
cmp w4, #8
add v0.4h, v0.4h, v1.4h
ushl v0.4h, v0.4h, v17.4h
b.eq 1f
// h = 4/16/32
cmp w4, #32
mov w16, #(0x3334/2)
mov w17, #(0x5556/2)
csel w16, w16, w17, eq
dup v16.4h, w16
sqdmulh v0.4h, v0.4h, v16.4h
1:
dup v0.8b, v0.b[0]
2:
st1 {v0.8b}, [x0], x1
st1 {v0.8b}, [x6], x1
subs w4, w4, #4
st1 {v0.8b}, [x0], x1
st1 {v0.8b}, [x6], x1
b.gt 2b
ret
L(ipred_dc_h16):
ld1 {v0.16b}, [x2], #16
uaddlv h0, v0.16b
br x3
L(ipred_dc_w16):
add x2, x2, #1
ld1 {v1.16b}, [x2]
add v0.4h, v0.4h, v16.4h
uaddlv h1, v1.16b
cmp w4, #16
add v0.4h, v0.4h, v1.4h
ushl v0.4h, v0.4h, v17.4h
b.eq 1f
// h = 4/8/32/64
tst w4, #(32+16+8) // 16 added to make a consecutive bitmask
mov w16, #(0x3334/2)
mov w17, #(0x5556/2)
csel w16, w16, w17, eq
dup v16.4h, w16
sqdmulh v0.4h, v0.4h, v16.4h
1:
dup v0.16b, v0.b[0]
2:
st1 {v0.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b}, [x0], x1
st1 {v0.16b}, [x6], x1
b.gt 2b
ret
L(ipred_dc_h32):
ld1 {v0.16b, v1.16b}, [x2], #32
uaddlv h0, v0.16b
uaddlv h1, v1.16b
add v0.4h, v0.4h, v1.4h
br x3
L(ipred_dc_w32):
add x2, x2, #1
ld1 {v1.16b, v2.16b}, [x2]
add v0.4h, v0.4h, v16.4h
uaddlv h1, v1.16b
uaddlv h2, v2.16b
cmp w4, #32
add v0.4h, v0.4h, v1.4h
add v0.4h, v0.4h, v2.4h
ushl v0.4h, v0.4h, v17.4h
b.eq 1f
// h = 8/16/64
cmp w4, #8
mov w16, #(0x3334/2)
mov w17, #(0x5556/2)
csel w16, w16, w17, eq
dup v16.4h, w16
sqdmulh v0.4h, v0.4h, v16.4h
1:
dup v0.16b, v0.b[0]
dup v1.16b, v0.b[0]
2:
st1 {v0.16b, v1.16b}, [x0], x1
st1 {v0.16b, v1.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b, v1.16b}, [x0], x1
st1 {v0.16b, v1.16b}, [x6], x1
b.gt 2b
ret
L(ipred_dc_h64):
ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x2], #64
uaddlv h0, v0.16b
uaddlv h1, v1.16b
uaddlv h2, v2.16b
uaddlv h3, v3.16b
add v0.4h, v0.4h, v1.4h
add v2.4h, v2.4h, v3.4h
add v0.4h, v0.4h, v2.4h
br x3
L(ipred_dc_w64):
mov v1.16b, v0.16b
mov v2.16b, v0.16b
mov v3.16b, v0.16b
2:
add x2, x2, #1
ld1 {v1.16b, v2.16b, v3.16b, v4.16b}, [x2]
add v0.4h, v0.4h, v16.4h
uaddlv h1, v1.16b
uaddlv h2, v2.16b
uaddlv h3, v3.16b
uaddlv h4, v4.16b
add v1.4h, v1.4h, v2.4h
add v3.4h, v3.4h, v4.4h
cmp w4, #64
add v0.4h, v0.4h, v1.4h
add v0.4h, v0.4h, v3.4h
ushl v0.4h, v0.4h, v17.4h
b.eq 1f
// h = 16/32
mov w16, #(0x5556/2)
movk w16, #(0x3334/2), lsl #16
lsr w16, w16, w4
dup v16.4h, w16
sqdmulh v0.4h, v0.4h, v16.4h
1:
dup v0.16b, v0.b[0]
dup v1.16b, v0.b[0]
dup v2.16b, v0.b[0]
dup v3.16b, v0.b[0]
2:
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], x1
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x6], x1
subs w4, w4, #4
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], x1
st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x6], x1
b.gt 2b
ret
L(ipred_dc_tbl):
.hword L(ipred_dc_tbl) - L(ipred_dc_h64)
.hword L(ipred_dc_tbl) - L(ipred_dc_h32)
.hword L(ipred_dc_tbl) - L(ipred_dc_h16)
.hword L(ipred_dc_tbl) - L(ipred_dc_h8)
.hword L(ipred_dc_tbl) - L(ipred_dc_h4)
.hword L(ipred_dc_tbl) - L(ipred_dc_w64)
.hword L(ipred_dc_tbl) - L(ipred_dc_w32)
.hword L(ipred_dc_tbl) - L(ipred_dc_w16)
.hword L(ipred_dc_tbl) - L(ipred_dc_w8)
.hword L(ipred_dc_tbl) - L(ipred_dc_w4)
endfunc