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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_sao_band_offset_chroma.s
@*
@* ,:brief
@* Contains function definitions for inter prediction interpolation.
@* Functions are coded using NEON intrinsics and can be compiled using@ ARM
@* RVCT
@*
@* ,:author
@* Parthiban V
@*
@* ,:par List of Functions:
@*
@*
@* ,:remarks
@* None
@*
@*******************************************************************************
@*/
@void ihevc_sao_band_offset_chroma(UWORD8 *pu1_src,
@ WORD32 src_strd,
@ UWORD8 *pu1_src_left,
@ UWORD8 *pu1_src_top,
@ UWORD8 *pu1_src_top_left,
@ WORD32 sao_band_pos_u,
@ WORD32 sao_band_pos_v,
@ WORD8 *pi1_sao_offset_u,
@ WORD8 *pi1_sao_offset_v,
@ WORD32 wd,
@ WORD32 ht)
@
@**************Variables Vs Registers*****************************************
@r0 => *pu1_src
@r1 => src_strd
@r2 => *pu1_src_left
@r3 => *pu1_src_top
@r4 => *pu1_src_top_left
@r5 => sao_band_pos_u
@r6 => sao_band_pos_v
@r7 => *pi1_sao_offset_u
@r8 => *pi1_sao_offset_v
@r9 => wd
@r10=> ht
.text
.p2align 2
.extern gu1_table_band_idx
.globl ihevc_sao_band_offset_chroma_a9q
gu1_table_band_idx_addr_1:
.long gu1_table_band_idx - ulbl1 - 8
gu1_table_band_idx_addr_2:
.long gu1_table_band_idx - ulbl2 - 8
ihevc_sao_band_offset_chroma_a9q:
STMFD sp!, {r4-r12, r14} @stack stores the values of the arguments
LDR r4,[sp,#40] @Loads pu1_src_top_left
LDR r10,[sp,#64] @Loads ht
LDR r9,[sp,#60] @Loads wd
MOV r11,r10 @Move the ht to r9 for loop counter
ADD r12,r0,r9 @pu1_src[row * src_strd + (wd)]
LDR r14, gu1_table_band_idx_addr_1
ulbl1:
add r14,r14,pc
SUB r12,r12,#2 @wd-2
SRC_LEFT_LOOP:
LDRH r5,[r12],r1 @Load the value
SUBS r11,r11,#1 @Decrement the loop counter
STRH r5,[r2],#2 @Store the value in pu1_src_left pointer
BNE SRC_LEFT_LOOP
LDR r5,[sp,#44] @Loads sao_band_pos_u
VLD1.8 D1,[r14]! @band_table_u.val[0]
ADD r12,r3,r9 @pu1_src_top[wd]
LDRH r11,[r12,#-2]
VLD1.8 D2,[r14]! @band_table_u.val[1]
LSL r6,r5,#3 @sao_band_pos_u
STRH r11,[r4] @store to pu1_src_top_left[0]
VLD1.8 D3,[r14]! @band_table_u.val[2]
LDR r7,[sp,#52] @Loads pi1_sao_offset_u
SUB r4,r10,#1 @ht-1
VDUP.8 D31,r6 @band_pos_u
MUL r4,r4,r1 @ht-1 * src_strd
ADD r4,r4,r0 @pu1_src[(ht - 1) * src_strd]
VLD1.8 D4,[r14]! @band_table_u.val[3]
MOV r11,r9 @Move the wd to r9 for loop counter
SRC_TOP_LOOP: @wd is always multiple of 8
VLD1.8 D0,[r4]! @Load pu1_src[(ht - 1) * src_strd + col]
SUBS r11,r11,#8 @Decrement the loop counter by 8
VST1.8 D0,[r3]! @Store to pu1_src_top[col]
BNE SRC_TOP_LOOP
VLD1.8 D30,[r7] @pi1_sao_offset_u load
VADD.I8 D5,D1,D31 @band_table_u.val[0] = vadd_u8(band_table_u.val[0], sao_band_pos_u)
VDUP.8 D29,D30[1] @vdup_n_u8(pi1_sao_offset_u[1])
VADD.I8 D6,D2,D31 @band_table_u.val[1] = vadd_u8(band_table_u.val[1], sao_band_pos_u)
VDUP.8 D28,D30[2] @vdup_n_u8(pi1_sao_offset_u[2])
VADD.I8 D7,D3,D31 @band_table_u.val[2] = vadd_u8(band_table_u.val[2], sao_band_pos_u)
VDUP.8 D27,D30[3] @vdup_n_u8(pi1_sao_offset_u[3])
VADD.I8 D8,D4,D31 @band_table_u.val[3] = vadd_u8(band_table_u.val[3], sao_band_pos_u)
CMP r5,#28
VDUP.8 D26,D30[4] @vdup_n_u8(pi1_sao_offset_u[4])
LDR r14, gu1_table_band_idx_addr_2
ulbl2:
add r14,r14,pc
VMOV.I8 D30,#16 @vdup_n_u8(16)
VADD.I8 D1,D5,D29 @band_table_u.val[0] = vadd_u8(band_table_u.val[0], vdup_n_u8(pi1_sao_offset_u[1]))
VLD1.8 D9,[r14]! @band_table_v.val[0]
VADD.I8 D2,D6,D28 @band_table_u.val[1] = vadd_u8(band_table_u.val[1], vdup_n_u8(pi1_sao_offset_u[2]))
VLD1.8 D10,[r14]! @band_table_v.val[1]
VADD.I8 D3,D7,D27 @band_table_u.val[2] = vadd_u8(band_table_u.val[2], vdup_n_u8(pi1_sao_offset_u[3]))
LDR r6,[sp,#48] @Loads sao_band_pos_v
VADD.I8 D4,D8,D26 @band_table_u.val[3] = vadd_u8(band_table_u.val[3], vdup_n_u8(pi1_sao_offset_u[4]))
LSL r11,r6,#3 @sao_band_pos_v
BLT SAO_BAND_POS_U_0
SAO_BAND_POS_U_28: @case 28
VCLE.U8 D13,D4,D30 @vcle_u8(band_table.val[3], vdup_n_u8(16))
BNE SAO_BAND_POS_U_29
VORR.U8 D4,D4,D13 @band_table.val[3] = vorr_u8(band_table.val[3], au1_cmp)
B SWITCH_BREAK_U
SAO_BAND_POS_U_29: @case 29
CMP r5,#29
VCLE.U8 D14,D3,D30 @vcle_u8(band_table.val[2], vdup_n_u8(16))
BNE SAO_BAND_POS_U_30
VORR.U8 D3,D3,D14 @band_table.val[2] = vorr_u8(band_table.val[2], au1_cmp)
VAND.U8 D4,D4,D13 @band_table.val[3] = vand_u8(band_table.val[3], au1_cmp)
B SWITCH_BREAK_U
SAO_BAND_POS_U_30: @case 30
CMP r5,#30
VCLE.U8 D15,D2,D30 @vcle_u8(band_table.val[1], vdup_n_u8(16))
BNE SAO_BAND_POS_U_31
VORR.U8 D2,D2,D15 @band_table.val[1] = vorr_u8(band_table.val[1], au1_cmp)
VAND.U8 D3,D3,D14 @band_table.val[2] = vand_u8(band_table.val[2], au1_cmp)
SAO_BAND_POS_U_31: @case 31
CMP r5,#31
BNE SWITCH_BREAK_U
VCLE.U8 D16,D1,D30 @vcle_u8(band_table.val[0], vdup_n_u8(16))
VORR.U8 D1,D1,D16 @band_table.val[0] = vorr_u8(band_table.val[0], au1_cmp)
VAND.U8 D2,D2,D15 @band_table.val[1] = vand_u8(band_table.val[1], au1_cmp)
B SWITCH_BREAK_U
SAO_BAND_POS_U_0:
CMP r5,#0 @case 0
BNE SWITCH_BREAK_U
VCLE.U8 D16,D1,D30 @vcle_u8(band_table.val[0], vdup_n_u8(16))
VAND.U8 D1,D1,D16 @band_table.val[0] = vand_u8(band_table.val[0], au1_cmp)
SWITCH_BREAK_U:
VDUP.8 D30,r11 @band_pos_v
LDR r8,[sp,#56] @Loads pi1_sao_offset_v
VLD1.8 D11,[r14]! @band_table_v.val[2]
VADD.I8 D13,D9,D30 @band_table_v.val[0] = vadd_u8(band_table_v.val[0], band_pos_v)
VLD1.8 D12,[r14]! @band_table_v.val[3]
VADD.I8 D14,D10,D30 @band_table_v.val[1] = vadd_u8(band_table_v.val[1], band_pos_v)
VLD1.8 D25,[r8] @pi1_sao_offset_v load
VADD.I8 D15,D11,D30 @band_table_v.val[2] = vadd_u8(band_table_v.val[2], band_pos_v)
VDUP.8 D29,D25[1] @vdup_n_u8(pi1_sao_offset_v[1])
VADD.I8 D16,D12,D30 @band_table_v.val[3] = vadd_u8(band_table_v.val[3], band_pos_v)
VDUP.8 D28,D25[2] @vdup_n_u8(pi1_sao_offset_v[2])
VADD.I8 D9,D13,D29 @band_table_v.val[0] = vadd_u8(band_table_v.val[0], vdup_n_u8(pi1_sao_offset_v[1]))
VDUP.8 D27,D25[3] @vdup_n_u8(pi1_sao_offset_v[3])
VADD.I8 D10,D14,D28 @band_table_v.val[1] = vadd_u8(band_table_v.val[1], vdup_n_u8(pi1_sao_offset_v[2]))
VDUP.8 D26,D25[4] @vdup_n_u8(pi1_sao_offset_v[4])
VADD.I8 D11,D15,D27 @band_table_v.val[2] = vadd_u8(band_table_v.val[2], vdup_n_u8(pi1_sao_offset_v[3]))
VMOV.I8 D29,#16 @vdup_n_u8(16)
VADD.I8 D12,D16,D26 @band_table_v.val[3] = vadd_u8(band_table_v.val[3], vdup_n_u8(pi1_sao_offset_v[4]))
AND r12,r9,#0xf
CMP r6,#28
BLT SAO_BAND_POS_V_0
SAO_BAND_POS_V_28: @case 28
VCLE.U8 D17,D12,D29 @vcle_u8(band_table.val[3], vdup_n_u8(16))
BNE SAO_BAND_POS_V_29
VORR.U8 D12,D12,D17 @band_table.val[3] = vorr_u8(band_table.val[3], au1_cmp)
B SWITCH_BREAK_V
SAO_BAND_POS_V_29: @case 29
CMP r6,#29
VCLE.U8 D18,D11,D29 @vcle_u8(band_table.val[2], vdup_n_u8(16))
BNE SAO_BAND_POS_V_30
VORR.U8 D11,D11,D18 @band_table.val[2] = vorr_u8(band_table.val[2], au1_cmp)
VAND.U8 D12,D12,D17 @band_table.val[3] = vand_u8(band_table.val[3], au1_cmp)
B SWITCH_BREAK_V
SAO_BAND_POS_V_30: @case 30
CMP r6,#30
VCLE.U8 D19,D10,D29 @vcle_u8(band_table.val[1], vdup_n_u8(16))
BNE SAO_BAND_POS_V_31
VORR.U8 D10,D10,D19 @band_table.val[1] = vorr_u8(band_table.val[1], au1_cmp)
VAND.U8 D11,D11,D18 @band_table.val[2] = vand_u8(band_table.val[2], au1_cmp)
B SWITCH_BREAK_V
SAO_BAND_POS_V_31: @case 31
CMP r6,#31
BNE SWITCH_BREAK_V
VCLE.U8 D20,D9,D29 @vcle_u8(band_table.val[0], vdup_n_u8(16))
VORR.U8 D9,D9,D20 @band_table.val[0] = vorr_u8(band_table.val[0], au1_cmp)
VAND.U8 D10,D10,D19 @band_table.val[1] = vand_u8(band_table.val[1], au1_cmp)
B SWITCH_BREAK_V
SAO_BAND_POS_V_0:
CMP r6,#0 @case 0
BNE SWITCH_BREAK_V
VCLE.U8 D20,D9,D29 @vcle_u8(band_table.val[0], vdup_n_u8(16))
VAND.U8 D9,D9,D20 @band_table.val[0] = vand_u8(band_table.val[0], au1_cmp)
SWITCH_BREAK_V:
CMP r9,#16
MOV r4,r0 @pu1_src_cpy
BLT WIDTH_RESIDUE
WIDTH_LOOP: @Width is assigned to be multiple of 16
MOV r4,r0 @pu1_src_cpy
MOV r11,r10 @move ht
ADD r5,r4,r1
HEIGHT_LOOP: @unrolled for 4 rows
ADD r6,r5,r1
VLD2.8 {D5,D6},[r4] @vld1q_u8(pu1_src_cpy)
ADD r7,r6,r1
VLD2.8 {D13,D14},[r5] @vld1q_u8(pu1_src_cpy)
VSUB.I8 D7,D5,D31 @vsub_u8(au1_cur_row_deint.val[0], band_pos_u)
VLD2.8 {D17,D18},[r6] @vld1q_u8(pu1_src_cpy)
VSUB.I8 D8,D6,D30 @vsub_u8(au1_cur_row_deint.val[1], band_pos_v)
VLD2.8 {D21,D22},[r7] @vld1q_u8(pu1_src_cpy)
VSUB.I8 D15,D13,D31 @vsub_u8(au1_cur_row_deint.val[0], band_pos_u)
VTBX.8 D5,{D1-D4},D7 @vtbx4_u8(au1_cur_row_deint.val[0], band_table_u, vsub_u8(au1_cur_row_deint.val[0], band_pos_u))
VSUB.I8 D16,D14,D30 @vsub_u8(au1_cur_row_deint.val[1], band_pos_v)
VTBX.8 D6,{D9-D12},D8 @vtbx4_u8(au1_cur_row_deint.val[1], band_table_v, vsub_u8(au1_cur_row_deint.val[1], band_pos_v))
VSUB.I8 D19,D17,D31 @vsub_u8(au1_cur_row_deint.val[0], band_pos_u)
VTBX.8 D13,{D1-D4},D15 @vtbx4_u8(au1_cur_row_deint.val[0], band_table_u, vsub_u8(au1_cur_row_deint.val[0], band_pos_u))
VSUB.I8 D20,D18,D30 @vsub_u8(au1_cur_row_deint.val[1], band_pos_v)
VTBX.8 D14,{D9-D12},D16 @vtbx4_u8(au1_cur_row_deint.val[1], band_table_v, vsub_u8(au1_cur_row_deint.val[1], band_pos_v))
VSUB.I8 D23,D21,D31 @vsub_u8(au1_cur_row_deint.val[0], band_pos_u)
VST2.8 {D5,D6},[r4] @vst1q_u8(pu1_src_cpy, au1_cur_row)
VSUB.I8 D24,D22,D30 @vsub_u8(au1_cur_row_deint.val[1], band_pos_v)
SUBS r11,r11,#4 @Decrement the ht loop count by 4
VTBX.8 D17,{D1-D4},D19 @vtbx4_u8(au1_cur_row_deint.val[0], band_table_u, vsub_u8(au1_cur_row_deint.val[0], band_pos_u))
VST2.8 {D13,D14},[r5] @vst1q_u8(pu1_src_cpy, au1_cur_row)
VTBX.8 D18,{D9-D12},D20 @vtbx4_u8(au1_cur_row_deint.val[1], band_table_v, vsub_u8(au1_cur_row_deint.val[1], band_pos_v))
VTBX.8 D21,{D1-D4},D23 @vtbx4_u8(au1_cur_row_deint.val[0], band_table_u, vsub_u8(au1_cur_row_deint.val[0], band_pos_u))
VTBX.8 D22,{D9-D12},D24 @vtbx4_u8(au1_cur_row_deint.val[1], band_table_v, vsub_u8(au1_cur_row_deint.val[1], band_pos_v))
VST2.8 {D17,D18},[r6],r1 @vst1q_u8(pu1_src_cpy, au1_cur_row)
ADD r4,r6,r1
VST2.8 {D21,D22},[r7] @vst1q_u8(pu1_src_cpy, au1_cur_row)
ADD r5,r4,r1
BNE HEIGHT_LOOP
SUB r9,r9,#16 @Decrement the width loop by 16
ADD r0,r0,#16
CMP r9,#8
BGT WIDTH_LOOP
BLT END_LOOP
MOV r4,r0 @pu1_src_cpy
WIDTH_RESIDUE: @If width is not multiple of 16
ADD r5,r4,r1
VLD2.8 {D5,D6},[r4] @vld1q_u8(pu1_src_cpy)
ADD r6,r5,r1
ADD r7,r6,r1
VLD2.8 {D13,D14},[r5] @vld1q_u8(pu1_src_cpy)
VSUB.I8 D7,D5,D31 @vsub_u8(au1_cur_row_deint.val[0], band_pos_u)
VLD2.8 {D17,D18},[r6] @vld1q_u8(pu1_src_cpy)
VSUB.I8 D8,D6,D30 @vsub_u8(au1_cur_row_deint.val[1], band_pos_v)
VTBX.8 D5,{D1-D4},D7 @vtbx4_u8(au1_cur_row_deint.val[0], band_table_u, vsub_u8(au1_cur_row_deint.val[0], band_pos_u))
VSUB.I8 D15,D13,D31 @vsub_u8(au1_cur_row_deint.val[0], band_pos_u)
VTBX.8 D6,{D9-D12},D8 @vtbx4_u8(au1_cur_row_deint.val[1], band_table_v, vsub_u8(au1_cur_row_deint.val[1], band_pos_v))
VSUB.I8 D16,D14,D30 @vsub_u8(au1_cur_row_deint.val[1], band_pos_v)
VLD2.8 {D21,D22},[r7] @vld1q_u8(pu1_src_cpy)
VSUB.I8 D19,D17,D31 @vsub_u8(au1_cur_row_deint.val[0], band_pos_u)
VTBX.8 D13,{D1-D4},D15 @vtbx4_u8(au1_cur_row_deint.val[0], band_table_u, vsub_u8(au1_cur_row_deint.val[0], band_pos_u))
VSUB.I8 D20,D18,D30 @vsub_u8(au1_cur_row_deint.val[1], band_pos_v)
VTBX.8 D14,{D9-D12},D16 @vtbx4_u8(au1_cur_row_deint.val[1], band_table_v, vsub_u8(au1_cur_row_deint.val[1], band_pos_v))
VZIP.8 D5,D6
VTBX.8 D17,{D1-D4},D19 @vtbx4_u8(au1_cur_row_deint.val[0], band_table_u, vsub_u8(au1_cur_row_deint.val[0], band_pos_u))
VSUB.I8 D23,D21,D31 @vsub_u8(au1_cur_row_deint.val[0], band_pos_u)
VST1.8 {D5},[r4] @vst1q_u8(pu1_src_cpy, au1_cur_row)
VZIP.8 D13,D14
VTBX.8 D18,{D9-D12},D20 @vtbx4_u8(au1_cur_row_deint.val[1], band_table_v, vsub_u8(au1_cur_row_deint.val[1], band_pos_v))
VSUB.I8 D24,D22,D30 @vsub_u8(au1_cur_row_deint.val[1], band_pos_v)
VST1.8 {D13},[r5] @vst1q_u8(pu1_src_cpy, au1_cur_row)
SUBS r10,r10,#4 @Decrement the ht loop count by 4
VTBX.8 D21,{D1-D4},D23 @vtbx4_u8(au1_cur_row_deint.val[0], band_table_u, vsub_u8(au1_cur_row_deint.val[0], band_pos_u))
VZIP.8 D17,D18
VTBX.8 D22,{D9-D12},D24 @vtbx4_u8(au1_cur_row_deint.val[1], band_table_v, vsub_u8(au1_cur_row_deint.val[1], band_pos_v))
VST1.8 {D17},[r6],r1 @vst1q_u8(pu1_src_cpy, au1_cur_row)
VZIP.8 D21,D22
ADD r4,r6,r1
VST1.8 {D21},[r7] @vst1q_u8(pu1_src_cpy, au1_cur_row)
ADD r5,r4,r1
BNE WIDTH_RESIDUE
END_LOOP:
LDMFD sp!,{r4-r12,r15} @Reload the registers from SP
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