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///*****************************************************************************
//*
//* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
//*
//* Licensed under the Apache License, Version 2.0 (the "License");
//* you may not use this file except in compliance with the License.
//* You may obtain a copy of the License at:
//*
//* http://www.apache.org/licenses/LICENSE-2.0
//*
//* Unless required by applicable law or agreed to in writing, software
//* distributed under the License is distributed on an "AS IS" BASIS,
//* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//* See the License for the specific language governing permissions and
//* limitations under the License.
//*
//*****************************************************************************/
///**
//*******************************************************************************
//* @file
//* ihevc_intra_pred_chroma_mode_27_to_33.s
//*
//* @brief
//* contains function definition for intra prediction interpolation filters
//*
//*
//* @author
//* parthiban v
//*
//* @par list of functions:
//* - ihevc_intra_pred_chroma_mode_27_to_33()
//*
//* @remarksll
//* none
//*
//*******************************************************************************
//*/
///**
//*******************************************************************************
//*
//* @brief
//* intraprediction for mode 27 to 33 (positive angle, vertical mode ) with
//*.extern neighboring samples location pointed by 'pu1_ref' to the tu
//* block location pointed by 'pu1_dst'
//*
//* @par description:
//*
//*
//* @param[in] pu1_src
//* uword8 pointer to the source
//*
//* @param[in] pu1_dst
//* uword8 pointer to the destination
//*
//* @param[in] src_strd
//* integer source stride
//*
//* @param[in] dst_strd
//* integer destination stride
//*
//* @param[in] nt
//* integer transform block size
//*
//* @param[in] mode
//* integer intraprediction mode
//*
//* @returns
//*
//* @remarks
//* none
//*
//*******************************************************************************
//*/
//.if intra_pred_chroma_27_t0_33 == c
//void ihevc_intra_pred_chroma_mode_27_to_33(uword8 *pu1_ref,
// word32 src_strd,
// uword8 *pu1_dst,
// word32 dst_strd,
// word32 nt,
// word32 mode)
.text
.align 4
.include "ihevc_neon_macros.s"
.globl ihevc_intra_pred_chroma_mode_27_to_33_av8
.extern gai4_ihevc_ang_table
.extern gau1_ihevc_planar_factor
.type ihevc_intra_pred_chroma_mode_27_to_33_av8, %function
ihevc_intra_pred_chroma_mode_27_to_33_av8:
// stmfd sp!, {x4-x12, x14} //stack stores the values of the arguments
push_v_regs
stp x19, x20,[sp,#-16]!
adrp x6, :got:gai4_ihevc_ang_table //loads word32 gai4_ihevc_ang_table[35]
ldr x6, [x6, #:got_lo12:gai4_ihevc_ang_table]
lsl x7,x4,#2 //four_nt
add x8,x6,x5,lsl #2 //*gai4_ihevc_ang_table[mode]
ldr w9, [x8] //intra_pred_ang = gai4_ihevc_ang_table[mode]
sxtw x9,w9
adrp x1, :got:gau1_ihevc_planar_factor //used for ((row + 1) * intra_pred_ang) row values
ldr x1, [x1, #:got_lo12:gau1_ihevc_planar_factor]
add x6,x1,#1
tst x4,#7
add x8,x0,x7 //pu1_ref + four_nt
mov x14,#0 //row
mov x12,x4
bne core_loop_4
lsl x4,x4,#1
b core_loop_8
core_loop_8:
add x8,x8,#2 //pu1_ref_main_idx += (four_nt + 1)
dup v0.8b,w9 //intra_pred_ang
lsr x12, x4, #4 //divide by 8
movi v1.8b, #32
mul x7, x4, x12
movi v6.8h, #31
mov x1,x8
mov x5,x4
mov x11,#2
prologue:
ld1 {v3.8b},[x6] //loads the row value
umull v2.8h, v3.8b, v0.8b //pos = ((row + 1) * intra_pred_ang)
and v4.16b, v2.16b , v6.16b //dup_const_fract(fract = pos & (31))
xtn v4.8b, v4.8h
shrn v5.8b, v2.8h,#5 //idx = pos >> 5
dup v31.8b, v4.8b[0]
add x0,x2,x3
smov x14, v5.2s[0] //(i row)extract idx to the r register
lsl x14,x14,#1
dup v29.8b, v4.8b[1] //(ii)
and x9,x14,#0xff //(i row) get the last byte
add x10,x8,x9 //(i row)*pu1_ref[ref_main_idx]
asr x14,x14,#8 //(ii)shift by 8
ld1 {v8.8b},[x10],x11 //(i row)ref_main_idx
and x9,x14,#0xff //(ii)get the last byte
asr x14,x14,#8 //(iii)
ld1 {v9.8b},[x10] //(i row)ref_main_idx_1
add x12,x8,x9 //(ii)*pu1_ref[ref_main_idx]
and x9,x14,#0xff //(iii)
sub v30.8b, v1.8b , v31.8b //32-fract(dup_const_32_fract)
add x10,x8,x9 //(iii)*pu1_ref[ref_main_idx]
ld1 {v12.8b},[x12],x11 //(ii)ref_main_idx
umull v10.8h, v8.8b, v30.8b //(i row)vmull_u8(ref_main_idx, dup_const_32_fract)
ld1 {v13.8b},[x12] //(ii)ref_main_idx_1
umlal v10.8h, v9.8b, v31.8b //(i row)vmull_u8(ref_main_idx_1, dup_const_fract)
asr x14,x14,#8 //(iv)
dup v27.8b, v4.8b[2] //(iii)
sub v28.8b, v1.8b , v29.8b //(ii)32-fract(dup_const_32_fract)
and x9,x14,#0xff //(iv)
dup v25.8b, v4.8b[3] //(iv)
umull v14.8h, v12.8b, v28.8b //(ii)vmull_u8(ref_main_idx, dup_const_32_fract)
add x12,x8,x9 //(iv)*pu1_ref[ref_main_idx]
ld1 {v16.8b},[x10],x11 //(iii)ref_main_idx
umlal v14.8h, v13.8b, v29.8b //(ii)vmull_u8(ref_main_idx_1, dup_const_fract)
ld1 {v17.8b},[x10] //(iii)ref_main_idx_1
rshrn v10.8b, v10.8h,#5 //(i row)shift_res = vrshrn_n_u16(add_res, 5)
ld1 {v20.8b},[x12],x11 //(iv)ref_main_idx
sub v26.8b, v1.8b , v27.8b //(iii)32-fract(dup_const_32_fract)
ld1 {v21.8b},[x12] //(iv)ref_main_idx_1
dup v31.8b, v4.8b[4] //(v)
umull v18.8h, v16.8b, v26.8b //(iii)vmull_u8(ref_main_idx, dup_const_32_fract)
smov x14, v5.2s[1] //extract idx to the r register
umlal v18.8h, v17.8b, v27.8b //(iii)vmull_u8(ref_main_idx_1, dup_const_fract)
lsl x14,x14,#1
st1 {v10.8b},[x2],#8 //(i row)
rshrn v14.8b, v14.8h,#5 //(ii)shift_res = vrshrn_n_u16(add_res, 5)
and x9,x14,#0xff //(v)
dup v29.8b, v4.8b[5] //(vi)
add x10,x8,x9 //(v)*pu1_ref[ref_main_idx]
ld1 {v8.8b},[x10],x11 //(v)ref_main_idx
sub v24.8b, v1.8b , v25.8b //(iv)32-fract(dup_const_32_fract)
asr x14,x14,#8 //(vi)
umull v22.8h, v20.8b, v24.8b //(iv)vmull_u8(ref_main_idx, dup_const_32_fract)
and x9,x14,#0xff //(vi)
ld1 {v9.8b},[x10] //(v)ref_main_idx_1
umlal v22.8h, v21.8b, v25.8b //(iv)vmull_u8(ref_main_idx_1, dup_const_fract)
st1 {v14.8b},[x0],x3 //(ii)
rshrn v18.8b, v18.8h,#5 //(iii)shift_res = vrshrn_n_u16(add_res, 5)
add x12,x8,x9 //(vi)*pu1_ref[ref_main_idx]
dup v27.8b, v4.8b[6] //(vii)
asr x14,x14,#8 //(vii)
and x9,x14,#0xff //(vii)
sub v30.8b, v1.8b , v31.8b //(v)32-fract(dup_const_32_fract)
add x10,x8,x9 //(vii)*pu1_ref[ref_main_idx]
ld1 {v12.8b},[x12],x11 //(vi)ref_main_idx
umull v10.8h, v8.8b, v30.8b //(v)vmull_u8(ref_main_idx, dup_const_32_fract)
ld1 {v13.8b},[x12] //(vi)ref_main_idx_1
umlal v10.8h, v9.8b, v31.8b //(v)vmull_u8(ref_main_idx_1, dup_const_fract)
st1 {v18.8b},[x0],x3 //(iii)
rshrn v22.8b, v22.8h,#5 //(iv)shift_res = vrshrn_n_u16(add_res, 5)
asr x14,x14,#8 //(viii)
dup v25.8b, v4.8b[7] //(viii)
and x9,x14,#0xff //(viii)
ld1 {v16.8b},[x10],x11 //(vii)ref_main_idx
sub v28.8b, v1.8b , v29.8b //(vi)32-fract(dup_const_32_fract)
ld1 {v17.8b},[x10] //(vii)ref_main_idx_1
umull v14.8h, v12.8b, v28.8b //(vi)vmull_u8(ref_main_idx, dup_const_32_fract)
add x12,x8,x9 //(viii)*pu1_ref[ref_main_idx]
umlal v14.8h, v13.8b, v29.8b //(vi)vmull_u8(ref_main_idx_1, dup_const_fract)
subs x7,x7,#8
st1 {v22.8b},[x0],x3 //(iv)
rshrn v10.8b, v10.8h,#5 //(v)shift_res = vrshrn_n_u16(add_res, 5)
ld1 {v20.8b},[x12],x11 //(viii)ref_main_idx
sub v26.8b, v1.8b , v27.8b //(vii)32-fract(dup_const_32_fract)
ld1 {v21.8b},[x12] //(viii)ref_main_idx_1
umull v18.8h, v16.8b, v26.8b //(vii)vmull_u8(ref_main_idx, dup_const_32_fract)
add x20,x8,#8
csel x8, x20, x8,gt
umlal v18.8h, v17.8b, v27.8b //(vii)vmull_u8(ref_main_idx_1, dup_const_fract)
sub x20,x4,#8
csel x4, x20, x4,gt
st1 {v10.8b},[x0],x3 //(v)
rshrn v14.8b, v14.8h,#5 //(vi)shift_res = vrshrn_n_u16(add_res, 5)
beq epilogue
ld1 {v5.8b},[x6] //loads the row value
umull v2.8h, v5.8b, v0.8b //pos = ((row + 1) * intra_pred_ang)
and v4.16b, v2.16b , v6.16b //dup_const_fract(fract = pos & (31))
xtn v4.8b, v4.8h
shrn v3.8b, v2.8h,#5 //idx = pos >> 5
smov x14, v3.2s[0] //(i)extract idx to the r register
lsl x14,x14,#1
and x9,x14,#0xff //(i)
add x10,x8,x9 //(i)*pu1_ref[ref_main_idx]
kernel_8_rows:
asr x14,x14,#8 //(ii)
dup v31.8b, v4.8b[0]
subs x4,x4,#8
ld1 {v8.8b},[x10],x11 //(i)ref_main_idx
sub v24.8b, v1.8b , v25.8b //(viii)32-fract(dup_const_32_fract)
and x9,x14,#0xff //(ii)
add x20,x6,#8 //increment the row value
csel x6, x20, x6,le
ld1 {v9.8b},[x10] //(i)ref_main_idx_1
umull v22.8h, v20.8b, v24.8b //(viii)vmull_u8(ref_main_idx, dup_const_32_fract)
add x12,x8,x9 //(ii)*pu1_ref[ref_main_idx]
ld1 {v5.8b},[x6] //loads the row value
umlal v22.8h, v21.8b, v25.8b //(viii)vmull_u8(ref_main_idx_1, dup_const_fract)
asr x14,x14,#8 //(iii)
dup v29.8b, v4.8b[1] //(ii)
rshrn v18.8b, v18.8h,#5 //(vii)shift_res = vrshrn_n_u16(add_res, 5)
and x9,x14,#0xff //(iii)
st1 {v14.8b},[x0],x3 //(vi)
sub v30.8b, v1.8b , v31.8b //(i)32-fract(dup_const_32_fract)
add x10,x8,x9 //(iii)*pu1_ref[ref_main_idx]
ld1 {v12.8b},[x12],x11 //(ii)ref_main_idx
umull v10.8h, v8.8b, v30.8b //(i)vmull_u8(ref_main_idx, dup_const_32_fract)
asr x14,x14,#8 //(iv)
ld1 {v13.8b},[x12] //(ii)ref_main_idx_1
umlal v10.8h, v9.8b, v31.8b //(i)vmull_u8(ref_main_idx_1, dup_const_fract)
and x9,x14,#0xff //(iv)
smov x14, v3.2s[1] //extract idx to the r register
rshrn v22.8b, v22.8h,#5 //(viii)shift_res = vrshrn_n_u16(add_res, 5)
dup v27.8b, v4.8b[2] //(iii)
sub v28.8b, v1.8b , v29.8b //(ii)32-fract(dup_const_32_fract)
csel x4, x5, x4,le //reload nt
ld1 {v16.8b},[x10],x11 //(iii)ref_main_idx
umull v14.8h, v12.8b, v28.8b //(ii)vmull_u8(ref_main_idx, dup_const_32_fract)
add x12,x8,x9 //(iv)*pu1_ref[ref_main_idx]
st1 {v18.8b},[x0],x3 //(vii)
umlal v14.8h, v13.8b, v29.8b //(ii)vmull_u8(ref_main_idx_1, dup_const_fract)
ld1 {v17.8b},[x10] //(iii)ref_main_idx_1
rshrn v10.8b, v10.8h,#5 //(i)shift_res = vrshrn_n_u16(add_res, 5)
dup v25.8b, v4.8b[3] //(iv)
umull v2.8h, v5.8b, v0.8b //pos = ((row + 1) * intra_pred_ang)
st1 {v22.8b},[x0] //(viii)
sub v26.8b, v1.8b , v27.8b //(iii)32-fract(dup_const_32_fract)
ld1 {v20.8b},[x12],x11 //(iv)ref_main_idx
umull v18.8h, v16.8b, v26.8b //(iii)vmull_u8(ref_main_idx, dup_const_32_fract)
lsl x14,x14,#1
ld1 {v21.8b},[x12] //(iv)ref_main_idx_1
umlal v18.8h, v17.8b, v27.8b //(iii)vmull_u8(ref_main_idx_1, dup_const_fract)
add x0,x2,x3
dup v31.8b, v4.8b[4] //(v)
rshrn v14.8b, v14.8h,#5 //(ii)shift_res = vrshrn_n_u16(add_res, 5)
and x9,x14,#0xff //(v)
st1 {v10.8b},[x2],#8 //(i)
sub v24.8b, v1.8b , v25.8b //(iv)32-fract(dup_const_32_fract)
add x10,x8,x9 //(v)*pu1_ref[ref_main_idx]
dup v29.8b, v4.8b[5] //(vi)
umull v22.8h, v20.8b, v24.8b //(iv)vmull_u8(ref_main_idx, dup_const_32_fract)
asr x14,x14,#8 //(vi)
dup v27.8b, v4.8b[6] //(vii)
umlal v22.8h, v21.8b, v25.8b //(iv)vmull_u8(ref_main_idx_1, dup_const_fract)
and x9,x14,#0xff //(vi)
dup v25.8b, v4.8b[7] //(viii)
rshrn v18.8b, v18.8h,#5 //(iii)shift_res = vrshrn_n_u16(add_res, 5)
add x12,x8,x9 //(vi)*pu1_ref[ref_main_idx]
ld1 {v8.8b},[x10],x11 //(v)ref_main_idx
and v4.16b, v2.16b , v6.16b //dup_const_fract(fract = pos & (31))
asr x14,x14,#8 //(vii)
ld1 {v9.8b},[x10] //(v)ref_main_idx_1
shrn v3.8b, v2.8h,#5 //idx = pos >> 5
and x9,x14,#0xff //(vii)
st1 {v14.8b},[x0],x3 //(ii)
rshrn v22.8b, v22.8h,#5 //(iv)shift_res = vrshrn_n_u16(add_res, 5)
asr x14,x14,#8 //(viii)
ld1 {v12.8b},[x12],x11 //(vi)ref_main_idx
sub v30.8b, v1.8b , v31.8b //(v)32-fract(dup_const_32_fract)
add x10,x8,x9 //(vii)*pu1_ref[ref_main_idx]
ld1 {v13.8b},[x12] //(vi)ref_main_idx_1
umull v10.8h, v8.8b, v30.8b //(v)vmull_u8(ref_main_idx, dup_const_32_fract)
and x9,x14,#0xff //(viii)
smov x14, v3.2s[0] //(i)extract idx to the r register
umlal v10.8h, v9.8b, v31.8b //(v)vmull_u8(ref_main_idx_1, dup_const_fract)
add x12,x8,x9 //(viii)*pu1_ref[ref_main_idx]
ld1 {v16.8b},[x10],x11 //(vii)ref_main_idx
sub v28.8b, v1.8b , v29.8b //(vi)32-fract(dup_const_32_fract)
st1 {v18.8b},[x0],x3 //(iii)
umull v14.8h, v12.8b, v28.8b //(vi)vmull_u8(ref_main_idx, dup_const_32_fract)
csel x8, x1, x8,le //reload the source to pu1_src+2nt
ld1 {v17.8b},[x10] //(vii)ref_main_idx_1
umlal v14.8h, v13.8b, v29.8b //(vi)vmull_u8(ref_main_idx_1, dup_const_fract)
add x20,x8,#8 //increment the source next set 8 columns in same row
csel x8, x20, x8,gt
ld1 {v20.8b},[x12],x11 //(viii)ref_main_idx
rshrn v10.8b, v10.8h,#5 //(v)shift_res = vrshrn_n_u16(add_res, 5)
ld1 {v21.8b},[x12] //(viii)ref_main_idx_1
sub v26.8b, v1.8b , v27.8b //(vii)32-fract(dup_const_32_fract)
lsl x20, x3,#3
csel x12,x20,x12,le
st1 {v22.8b},[x0],x3 //(iv)
umull v18.8h, v16.8b, v26.8b //(vii)vmull_u8(ref_main_idx, dup_const_32_fract)
sub x20,x12,x5
csel x12, x20, x12,le
st1 {v10.8b},[x0],x3 //(v)
umlal v18.8h, v17.8b, v27.8b //(vii)vmull_u8(ref_main_idx_1, dup_const_fract)
add x20,x2,x12 //increment the dst pointer to 8*dst_strd - nt
csel x2, x20, x2,le
xtn v4.8b, v4.8h
rshrn v14.8b, v14.8h,#5 //(vi)shift_res = vrshrn_n_u16(add_res, 5)
lsl x14,x14,#1
and x9,x14,#0xff //(i)
subs x7,x7,#8
add x10,x8,x9 //(i)*pu1_ref[ref_main_idx]
bne kernel_8_rows
epilogue:
st1 {v14.8b},[x0],x3 //(vi)
rshrn v18.8b, v18.8h,#5 //(vii)shift_res = vrshrn_n_u16(add_res, 5)
sub v24.8b, v1.8b , v25.8b //(viii)32-fract(dup_const_32_fract)
umull v22.8h, v20.8b, v24.8b //(viii)vmull_u8(ref_main_idx, dup_const_32_fract)
umlal v22.8h, v21.8b, v25.8b //(viii)vmull_u8(ref_main_idx_1, dup_const_fract)
st1 {v18.8b},[x0],x3 //(vii)
rshrn v22.8b, v22.8h,#5 //(viii)shift_res = vrshrn_n_u16(add_res, 5)
st1 {v22.8b},[x0],x3 //(viii)
b end_loops
core_loop_4:
add x10,x8,#2 //pu1_ref_main_idx += (four_nt + 1)
add x11,x8,#4 //pu1_ref_main_idx_1 += (four_nt + 2)
mov x8,#0
add x5,x8,#1 //row + 1
mul x5, x5, x9 //pos = ((row + 1) * intra_pred_ang)
and x5,x5,#31 //fract = pos & (31)
cmp x14,x5 //if(fract_prev > fract)
add x20,x10,#2 //pu1_ref_main_idx += 2
csel x10, x20, x10,gt
add x11,x10,#2 //pu1_ref_main_idx_1 += 2
dup v0.8b,w5 //dup_const_fract
sub x20,x5,#32
neg x4, x20
dup v1.8b,w4 //dup_const_32_fract
//inner_loop_4
ld1 {v2.8b},[x10] //ref_main_idx
add x8,x8,#1
mov x14,x5 //fract_prev = fract
ld1 {v3.8b},[x11] //ref_main_idx_1
add x5,x8,#1 //row + 1
mul x5, x5, x9 //pos = ((row + 1) * intra_pred_ang)
and x5,x5,#31 //fract = pos & (31)
cmp x14,x5 //if(fract_prev > fract)
add x20,x10,#2 //pu1_ref_main_idx += 1
csel x10, x20, x10,gt
add x11,x10,#2 //pu1_ref_main_idx_1 += 1
dup v6.8b,w5 //dup_const_fract
umull v4.8h, v2.8b, v1.8b //vmull_u8(ref_main_idx, dup_const_32_fract)
sub x20,x5,#32
neg x4, x20
dup v7.8b,w4 //dup_const_32_fract
umlal v4.8h, v3.8b, v0.8b //vmull_u8(ref_main_idx_1, dup_const_fract)
ld1 {v8.8b},[x10] //ref_main_idx
add x8,x8,#1
ld1 {v9.8b},[x11] //ref_main_idx_1
rshrn v4.8b, v4.8h,#5 //shift_res = vrshrn_n_u16(add_res, 5)
mov x14,x5 //fract_prev = fract
add x5,x8,#1 //row + 1
mul x5, x5, x9 //pos = ((row + 1) * intra_pred_ang)
and x5,x5,#31 //fract = pos & (31)
cmp x14,x5 //if(fract_prev > fract)
add x20,x10,#2 //pu1_ref_main_idx += 1
csel x10, x20, x10,gt
add x11,x10,#2 //pu1_ref_main_idx_1 += 1
dup v12.8b,w5 //dup_const_fract
umull v10.8h, v8.8b, v7.8b //vmull_u8(ref_main_idx, dup_const_32_fract)
sub x20,x5,#32
neg x4, x20
dup v13.8b,w4 //dup_const_32_fract
umlal v10.8h, v9.8b, v6.8b //vmull_u8(ref_main_idx_1, dup_const_fract)
ld1 {v14.8b},[x10] //ref_main_idx
add x8,x8,#1
st1 {v4.8b},[x2],x3
rshrn v10.8b, v10.8h,#5 //shift_res = vrshrn_n_u16(add_res, 5)
ld1 {v15.8b},[x11] //ref_main_idx_1
mov x14,x5 //fract_prev = fract
add x5,x8,#1 //row + 1
mul x5, x5, x9 //pos = ((row + 1) * intra_pred_ang)
and x5,x5,#31 //fract = pos & (31)
cmp x14,x5 //if(fract_prev > fract)
add x20,x10,#2 //pu1_ref_main_idx += 1
csel x10, x20, x10,gt
add x11,x10,#2 //pu1_ref_main_idx_1 += 1
dup v18.8b,w5 //dup_const_fract
umull v16.8h, v14.8b, v13.8b //vmull_u8(ref_main_idx, dup_const_32_fract)
sub x20,x5,#32
neg x4, x20
dup v19.8b,w4 //dup_const_32_fract
umlal v16.8h, v15.8b, v12.8b //vmull_u8(ref_main_idx_1, dup_const_fract)
ld1 {v20.8b},[x10] //ref_main_idx
st1 {v10.8b},[x2],x3
rshrn v16.8b, v16.8h,#5 //shift_res = vrshrn_n_u16(add_res, 5)
ld1 {v21.8b},[x11] //ref_main_idx_1
umull v22.8h, v20.8b, v19.8b //vmull_u8(ref_main_idx, dup_const_32_fract)
umlal v22.8h, v21.8b, v18.8b //vmull_u8(ref_main_idx_1, dup_const_fract)
st1 {v16.8b},[x2],x3
rshrn v22.8b, v22.8h,#5 //shift_res = vrshrn_n_u16(add_res, 5)
st1 {v22.8b},[x2],x3
end_loops:
// ldmfd sp!,{x4-x12,x15} //reload the registers from sp
ldp x19, x20,[sp],#16
pop_v_regs
ret
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