@/*****************************************************************************
@*
@* 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_edge_offset_class1_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_edge_offset_class1_chroma(UWORD8 *pu1_src,
@ WORD32 src_strd,
@ UWORD8 *pu1_src_left,
@ UWORD8 *pu1_src_top,
@ UWORD8 *pu1_src_top_left,
@ UWORD8 *pu1_src_top_right,
@ UWORD8 *pu1_src_bot_left,
@ UWORD8 *pu1_avail,
@ 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 => *pu1_avail
@r6 => *pi1_sao_offset_u
@r7 => *pi1_sao_offset_v
@r8 => wd
@r9 => ht
.equ pu1_src_top_left_offset, 104
.equ pu1_src_top_right_offset, 108
.equ pu1_src_bot_left_offset, 112
.equ pu1_avail_offset, 116
.equ pi1_sao_u_offset, 120
.equ pi1_sao_v_offset, 124
.equ wd_offset, 128
.equ ht_offset, 132
.text
.p2align 2
.extern gi1_table_edge_idx
.globl ihevc_sao_edge_offset_class1_chroma_a9q
gi1_table_edge_idx_addr:
.long gi1_table_edge_idx - ulbl1 - 8
ihevc_sao_edge_offset_class1_chroma_a9q:
STMFD sp!, {r4-r12, r14} @stack stores the values of the arguments
vpush {d8 - d15}
LDR r4,[sp,#pu1_src_top_left_offset] @Loads pu1_src_top_left
LDR r5,[sp,#pu1_avail_offset] @Loads pu1_avail
LDR r6,[sp,#pi1_sao_u_offset] @Loads pi1_sao_offset_u
LDR r7,[sp,#pi1_sao_v_offset] @Loads pi1_sao_offset_v
LDR r8,[sp,#wd_offset] @Loads wd
LDR r9,[sp,#ht_offset] @Loads ht
SUB r10,r8,#2 @wd - 2
LDRH r11,[r3,r10] @pu1_src_top[wd - 2]
STRH r11,[r4] @*pu1_src_top_left = pu1_src_top[wd - 2]
ADD r11,r0,r10 @pu1_src[row * src_strd + wd - 2]
MOV r12,r2 @Move pu1_src_left pointer to r11
MOV r14,r9 @Move ht to r14 for loop count
SRC_LEFT_LOOP:
LDRH r10,[r11],r1 @Load pu1_src[row * src_strd + wd - 2]
STRH r10,[r12],#2 @pu1_src_left[row]
SUBS r14,#1 @Decrement the loop count
BNE SRC_LEFT_LOOP @If not equal to 0 jump to the src_left_loop
SUB r12,r9,#1 @ht - 1
MUL r12,r12,r1 @(ht - 1) * src_strd
ADD r12,r12,r0 @pu1_src[(ht - 1) * src_strd]
LDRB r4,[r5,#2] @pu1_avail[2]
CMP r4,#0 @0 == pu1_avail[2]
ADDEQ r0,r0,r1 @pu1_src += src_strd
SUBEQ r9,r9,#1 @ht--
LDRB r4,[r5,#3] @pu1_avail[3]
CMP r4,#0 @0 == pu1_avail[3]
SUBEQ r9,r9,#1 @ht--
VMOV.I8 Q0,#2 @const_2 = vdupq_n_s8(2)
VMOV.I16 Q1,#0 @const_min_clip = vdupq_n_s16(0)
VMOV.I16 Q2,#255 @const_max_clip = vdupq_n_u16((1 << bit_depth) - 1)
LDR r14, gi1_table_edge_idx_addr @table pointer
ulbl1:
add r14,r14,pc
VLD1.8 D6,[r14] @edge_idx_tbl = vld1_s8(gi1_table_edge_idx)
VLD1.8 D7,[r6] @offset_tbl_u = vld1_s8(pi1_sao_offset_u)
VLD1.8 D8,[r7] @offset_tbl_v = vld1_s8(pi1_sao_offset_v)
CMP r8,#16 @Compare wd with 16
BLT WIDTH_RESIDUE @If not jump to WIDTH_RESIDUE where loop is unrolled for 8 case
WIDTH_LOOP_16:
LDRB r4,[r5,#2] @pu1_avail[2]
CMP r4,#0 @0 == pu1_avail[2]
SUBEQ r11,r0,r1 @pu1_src -= src_strd
MOVNE r11,r3 @*pu1_src_top
MOV r10,r0 @*pu1_src
VLD1.8 D28,[r11]! @pu1_top_row = vld1q_u8(pu1_src_top_cpy || pu1_src - src_strd)
VLD1.8 D29,[r11]! @pu1_top_row = vld1q_u8(pu1_src_top_cpy || pu1_src - src_strd)
VLD1.8 D10,[r0]! @pu1_cur_row = vld1q_u8(pu1_src)
VLD1.8 D11,[r0]! @pu1_cur_row = vld1q_u8(pu1_src)
VLD1.8 D30,[r12]! @vld1q_u8(pu1_src[(ht - 1) * src_strd])
VLD1.8 D31,[r12]! @vld1q_u8(pu1_src[(ht - 1) * src_strd])
VCGT.U8 Q6,Q5,Q14 @vcgtq_u8(pu1_cur_row, pu1_top_row)
VST1.8 {Q15},[r3]! @vst1q_u8(pu1_src_top[col])
VCLT.U8 Q7,Q5,Q14 @vcltq_u8(pu1_cur_row, pu1_top_row)
VSUB.U8 Q8,Q7,Q6 @sign_up = vreinterpretq_s8_u8(vsubq_u8(cmp_lt, cmp_gt))
MOV r11,r9 @move ht to r11 for loop count
PU1_SRC_LOOP:
ADD r10,r10,r1 @*pu1_src + src_strd
VLD1.8 D18,[r10]! @pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
VLD1.8 D19,[r10] @pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
SUB r10,#8
ADD r6,r10,r1 @II Iteration *pu1_src + src_strd
VCGT.U8 Q6,Q5,Q9 @vcgtq_u8(pu1_cur_row, pu1_top_row)
VLD1.8 D30,[r6]! @II pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
VLD1.8 D31,[r6] @II pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
SUB r6,#8
VCLT.U8 Q7,Q5,Q9 @vcltq_u8(pu1_cur_row, pu1_top_row)
SUB r10,r10,r1
VSUB.U8 Q10,Q7,Q6 @sign_down = vreinterpretq_s8_u8(vsubq_u8(cmp_lt, cmp_gt))
VMOVL.U8 Q13,D18 @II pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(pu1_cur_row)))
VADD.I8 Q6,Q0,Q8 @edge_idx = vaddq_s8(const_2, sign_up)
VMOVL.U8 Q14,D19 @II pi2_tmp_cur_row.val[1] = vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(pu1_cur_row)))
VADD.I8 Q6,Q6,Q10 @edge_idx = vaddq_s8(edge_idx, sign_down)
VCGT.U8 Q11,Q9,Q15 @II vcgtq_u8(pu1_cur_row, pu1_top_row)
VNEG.S8 Q8,Q10 @sign_up = vnegq_s8(sign_down)
VTBL.8 D12,{D6},D12 @vtbl1_s8(edge_idx_tbl, vget_low_s8(edge_idx))
VCLT.U8 Q12,Q9,Q15 @II vcltq_u8(pu1_cur_row, pu1_top_row)
VSUB.U8 Q14,Q12,Q11 @II sign_down = vreinterpretq_s8_u8(vsubq_u8(cmp_lt, cmp_gt))
VTBL.8 D13,{D6},D13 @vtbl1_s8(edge_idx_tbl, vget_high_s8(edge_idx))
VADD.I8 Q11,Q0,Q8 @II edge_idx = vaddq_s8(const_2, sign_up)
VUZP.8 D12,D13
VNEG.S8 Q8,Q14 @II sign_up = vnegq_s8(sign_down)
VTBL.8 D12,{D7},D12 @offset = vtbl1_s8(offset_tbl, vget_low_s8(edge_idx))
VADD.I8 Q11,Q11,Q14 @II edge_idx = vaddq_s8(edge_idx, sign_down)
VMOVL.U8 Q10,D10 @pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(pu1_cur_row)))
VTBL.8 D13,{D8},D13
VZIP.8 D12,D13
VADDW.S8 Q10,Q10,D12 @pi2_tmp_cur_row.val[0] = vaddw_s8(pi2_tmp_cur_row.val[0], offset)
VTBL.8 D22,{D6},D22 @II vtbl1_s8(edge_idx_tbl, vget_low_s8(edge_idx))
VMAX.S16 Q10,Q10,Q1 @pi2_tmp_cur_row.val[0] = vmaxq_s16(pi2_tmp_cur_row.val[0], const_min_clip)
VMIN.U16 Q10,Q10,Q2 @pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vminq_u16(vreinterpretq_u16_s16(pi2_tmp_cur_row.val[0]), const_max_clip))
VTBL.8 D23,{D6},D23 @II vtbl1_s8(edge_idx_tbl, vget_high_s8(edge_idx))
VUZP.8 D22,D23
VMOVL.U8 Q14,D11 @pi2_tmp_cur_row.val[1] = vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(pu1_cur_row)))
@VTBL.8 D13,D7,D13 @offset = vtbl1_s8(offset_tbl, vget_high_s8(edge_idx))
VMOV Q5,Q15 @II pu1_cur_row = pu1_next_row
VADDW.S8 Q14,Q14,D13 @pi2_tmp_cur_row.val[1] = vaddw_s8(pi2_tmp_cur_row.val[1], offset)
VTBL.8 D24,{D7},D22 @offset = vtbl1_s8(offset_tbl, vget_low_s8(edge_idx))
VMAX.S16 Q14,Q14,Q1 @pi2_tmp_cur_row.val[1] = vmaxq_s16(pi2_tmp_cur_row.val[1], const_min_clip)
VTBL.8 D25,{D8},D23
VZIP.8 D24,D25
@VTBL.8 D24,D7,D22 @II offset = vtbl1_s8(offset_tbl, vget_low_s8(edge_idx))
VMIN.U16 Q14,Q14,Q2 @pi2_tmp_cur_row.val[1] = vreinterpretq_s16_u16(vminq_u16(vreinterpretq_u16_s16(pi2_tmp_cur_row.val[1]), const_max_clip))
@VTBL.8 D25,D7,D23 @II offset = vtbl1_s8(offset_tbl, vget_high_s8(edge_idx))
VMOVN.I16 D20,Q10 @vmovn_s16(pi2_tmp_cur_row.val[0])
VADDW.S8 Q13,Q13,D24 @II pi2_tmp_cur_row.val[0] = vaddw_s8(pi2_tmp_cur_row.val[0], offset)
VMOVN.I16 D21,Q14 @vmovn_s16(pi2_tmp_cur_row.val[1])
VMOVL.U8 Q14,D19 @II pi2_tmp_cur_row.val[1] = vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(pu1_cur_row)))
VADDW.S8 Q14,Q14,D25 @II pi2_tmp_cur_row.val[1] = vaddw_s8(pi2_tmp_cur_row.val[1], offset)
VMAX.S16 Q13,Q13,Q1 @II pi2_tmp_cur_row.val[0] = vmaxq_s16(pi2_tmp_cur_row.val[0], const_min_clip)
VMIN.U16 Q13,Q13,Q2 @II pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vminq_u16(vreinterpretq_u16_s16(pi2_tmp_cur_row.val[0]), const_max_clip))
VMAX.S16 Q14,Q14,Q1 @II pi2_tmp_cur_row.val[1] = vmaxq_s16(pi2_tmp_cur_row.val[1], const_min_clip)
VMIN.U16 Q14,Q14,Q2 @II pi2_tmp_cur_row.val[1] = vreinterpretq_s16_u16(vminq_u16(vreinterpretq_u16_s16(pi2_tmp_cur_row.val[1]), const_max_clip))
VST1.8 {Q10},[r10],r1 @vst1q_u8(pu1_src_cpy, pu1_cur_row)
VMOVN.I16 D30,Q13 @II vmovn_s16(pi2_tmp_cur_row.val[0])
SUBS r11,r11,#2 @II Decrement the ht loop count by 1
VMOVN.I16 D31,Q14 @II vmovn_s16(pi2_tmp_cur_row.val[1])
VST1.8 {Q15},[r10],r1 @II vst1q_u8(pu1_src_cpy, pu1_cur_row)
BEQ PU1_SRC_LOOP_END @if 0 == pu1_avail[3] || 0 == pu1_avail[2] ht = ht--
CMP r11,#1 @checking any residue remains
BGT PU1_SRC_LOOP @If not equal jump to PU1_SRC_LOOP
ADD r10,r10,r1 @*pu1_src + src_strd
VLD1.8 D18,[r10]! @pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
VLD1.8 D19,[r10] @pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
SUB r10,#8
VCGT.U8 Q6,Q5,Q9 @vcgtq_u8(pu1_cur_row, pu1_top_row)
VCLT.U8 Q7,Q5,Q9 @vcltq_u8(pu1_cur_row, pu1_top_row)
VSUB.U8 Q10,Q7,Q6 @sign_down = vreinterpretq_s8_u8(vsubq_u8(cmp_lt, cmp_gt))
SUB r10,r10,r1
VADD.I8 Q11,Q0,Q8 @edge_idx = vaddq_s8(const_2, sign_up)
VADD.I8 Q11,Q11,Q10 @edge_idx = vaddq_s8(edge_idx, sign_down)
VTBL.8 D22,{D6},D22 @vtbl1_s8(edge_idx_tbl, vget_low_s8(edge_idx))
VTBL.8 D23,{D6},D23 @vtbl1_s8(edge_idx_tbl, vget_high_s8(edge_idx))
VUZP.8 D22,D23
VTBL.8 D24,{D7},D22
VTBL.8 D25,{D8},D23
VZIP.8 D24,D25
@VTBL.8 D24,D7,D22 @offset = vtbl1_s8(offset_tbl, vget_low_s8(edge_idx))
VMOVL.U8 Q13,D10 @pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(pu1_cur_row)))
VADDW.S8 Q13,Q13,D24 @pi2_tmp_cur_row.val[0] = vaddw_s8(pi2_tmp_cur_row.val[0], offset)
VMAX.S16 Q13,Q13,Q1 @pi2_tmp_cur_row.val[0] = vmaxq_s16(pi2_tmp_cur_row.val[0], const_min_clip)
VMIN.U16 Q13,Q13,Q2 @pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vminq_u16(vreinterpretq_u16_s16(pi2_tmp_cur_row.val[0]), const_max_clip))
@VTBL.8 D25,D7,D23 @offset = vtbl1_s8(offset_tbl, vget_high_s8(edge_idx))
VMOVL.U8 Q14,D11 @pi2_tmp_cur_row.val[1] = vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(pu1_cur_row)))
VADDW.S8 Q14,Q14,D25 @pi2_tmp_cur_row.val[1] = vaddw_s8(pi2_tmp_cur_row.val[1], offset)
VMAX.S16 Q14,Q14,Q1 @pi2_tmp_cur_row.val[1] = vmaxq_s16(pi2_tmp_cur_row.val[1], const_min_clip)
VMIN.U16 Q14,Q14,Q2 @pi2_tmp_cur_row.val[1] = vreinterpretq_s16_u16(vminq_u16(vreinterpretq_u16_s16(pi2_tmp_cur_row.val[1]), const_max_clip))
VMOVN.I16 D30,Q13 @vmovn_s16(pi2_tmp_cur_row.val[0])
VMOVN.I16 D31,Q14 @vmovn_s16(pi2_tmp_cur_row.val[1])
VST1.8 {Q15},[r10],r1 @vst1q_u8(pu1_src_cpy, pu1_cur_row)
PU1_SRC_LOOP_END:
VMOV Q5,Q9 @pu1_cur_row = pu1_next_row
SUBS r8,r8,#16 @Decrement the wd loop count by 16
CMP r8,#8 @Check whether residue remains
BEQ WIDTH_RESIDUE @If residue remains jump to residue loop
BGT WIDTH_LOOP_16 @If not equal jump to width_loop
BLT END_LOOPS @Jump to end function
WIDTH_RESIDUE:
LDRB r4,[r5,#2] @pu1_avail[2]
CMP r4,#0 @0 == pu1_avail[2]
SUBEQ r11,r0,r1 @pu1_src -= src_strd
MOVNE r11,r3 @*pu1_src_top
MOV r10,r0
VLD1.8 D28,[r11]! @pu1_top_row = vld1q_u8(pu1_src_top_cpy || pu1_src - src_strd)
VLD1.8 D29,[r11]! @pu1_top_row = vld1q_u8(pu1_src_top_cpy || pu1_src - src_strd)
VLD1.8 D10,[r0]! @pu1_cur_row = vld1q_u8(pu1_src)
VLD1.8 D11,[r0]! @pu1_cur_row = vld1q_u8(pu1_src)
VLD1.8 D30,[r12] @vld1_u8(pu1_src[(ht - 1) * src_strd])
VST1.8 {D30},[r3] @vst1_u8(pu1_src_top[col])
VCGT.U8 Q6,Q5,Q14 @vcgtq_u8(pu1_cur_row, pu1_top_row)
VCLT.U8 Q7,Q5,Q14 @vcltq_u8(pu1_cur_row, pu1_top_row)
VSUB.U8 Q8,Q7,Q6 @sign_up = vreinterpretq_s8_u8(vsubq_u8(cmp_lt, cmp_gt))
MOV r11,r9 @move ht to r11 for loop count
PU1_SRC_LOOP_RESIDUE:
ADD r10,r10,r1 @*pu1_src + src_strd
VLD1.8 D18,[r10]! @pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
VLD1.8 D19,[r10] @pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
SUB r10,#8
ADD r6,r10,r1 @II Iteration *pu1_src + src_strd
VCGT.U8 Q6,Q5,Q9 @vcgtq_u8(pu1_cur_row, pu1_next_row)
VLD1.8 D30,[r6]! @II pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
VLD1.8 D31,[r6] @II pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
SUB r6,#8
VCLT.U8 Q7,Q5,Q9 @vcltq_u8(pu1_cur_row, pu1_next_row)
SUB r10,r10,r1
VSUB.U8 Q10,Q7,Q6 @sign_down = vreinterpretq_s8_u8(vsubq_u8(cmp_lt, cmp_gt))
VMOVL.U8 Q13,D18 @II pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(pu1_cur_row)))
VADD.I8 Q6,Q0,Q8 @edge_idx = vaddq_s8(const_2, sign_up)
VCGT.U8 Q11,Q9,Q15 @II vcgtq_u8(pu1_cur_row, pu1_next_row)
VADD.I8 Q6,Q6,Q10 @edge_idx = vaddq_s8(edge_idx, sign_down)
VCLT.U8 Q12,Q9,Q15 @II vcltq_u8(pu1_cur_row, pu1_next_row)
VNEG.S8 Q8,Q10 @sign_up = vnegq_s8(sign_down)
VTBL.8 D12,{D6},D12 @vtbl1_s8(edge_idx_tbl, vget_low_s8(edge_idx))
VSUB.U8 Q10,Q12,Q11 @II sign_down = vreinterpretq_s8_u8(vsubq_u8(cmp_lt, cmp_gt))
VUZP.8 D12,D13
VADD.I8 Q11,Q0,Q8 @II edge_idx = vaddq_s8(const_2, sign_up)
VTBL.8 D12,{D7},D12
VNEG.S8 Q8,Q10 @II sign_up = vnegq_s8(sign_down)
VTBL.8 D13,{D8},D13
VZIP.8 D12,D13
@VTBL.8 D12,D7,D12 @offset = vtbl1_s8(offset_tbl, vget_low_s8(edge_idx))
VADD.I8 Q11,Q11,Q10 @II edge_idx = vaddq_s8(edge_idx, sign_down)
VMOVL.U8 Q10,D10 @pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(pu1_cur_row)))
VADDW.S8 Q10,Q10,D12 @pi2_tmp_cur_row.val[0] = vaddw_s8(pi2_tmp_cur_row.val[0], offset)
VTBL.8 D22,{D6},D22 @II vtbl1_s8(edge_idx_tbl, vget_low_s8(edge_idx))
VMAX.S16 Q10,Q10,Q1 @pi2_tmp_cur_row.val[0] = vmaxq_s16(pi2_tmp_cur_row.val[0], const_min_clip)
VUZP.8 D22,D23
VMIN.U16 Q10,Q10,Q2 @pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vminq_u16(vreinterpretq_u16_s16(pi2_tmp_cur_row.val[0]), const_max_clip))
VTBL.8 D24,{D7},D22
VMOVN.I16 D20,Q10 @vmovn_s16(pi2_tmp_cur_row.val[0])
VTBL.8 D25,{D8},D23
VZIP.8 D24,D25
@VTBL.8 D24,D7,D22 @II offset = vtbl1_s8(offset_tbl, vget_low_s8(edge_idx))
VADDW.S8 Q13,Q13,D24 @II pi2_tmp_cur_row.val[0] = vaddw_s8(pi2_tmp_cur_row.val[0], offset)
VMAX.S16 Q13,Q13,Q1 @II pi2_tmp_cur_row.val[0] = vmaxq_s16(pi2_tmp_cur_row.val[0], const_min_clip)
VMIN.U16 Q13,Q13,Q2 @II pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vminq_u16(vreinterpretq_u16_s16(pi2_tmp_cur_row.val[0]), const_max_clip))
VMOV Q5,Q15 @II pu1_cur_row = pu1_next_row
VST1.8 {D20},[r10],r1 @vst1q_u8(pu1_src_cpy, pu1_cur_row)
VMOVN.I16 D30,Q13 @II vmovn_s16(pi2_tmp_cur_row.val[0])
SUBS r11,r11,#2 @Decrement the ht loop count by 1
VST1.8 {D30},[r10],r1 @II vst1q_u8(pu1_src_cpy, pu1_cur_row)
BEQ END_LOOPS
CMP r11,#1
BGT PU1_SRC_LOOP_RESIDUE @If not equal jump to PU1_SRC_LOOP
ADD r10,r10,r1 @*pu1_src + src_strd
VLD1.8 D18,[r10]! @pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
VLD1.8 D19,[r10] @pu1_next_row = vld1q_u8(pu1_src_cpy + src_strd)
SUB r10,#8
VCGT.U8 Q6,Q5,Q9 @vcgtq_u8(pu1_cur_row, pu1_next_row)
VCGT.U8 Q7,Q9,Q5 @vcltq_u8(pu1_cur_row, pu1_next_row)
VSUB.U8 Q10,Q7,Q6 @sign_down = vreinterpretq_s8_u8(vsubq_u8(cmp_lt, cmp_gt))
SUB r10,r10,r1
VADD.I8 Q11,Q0,Q8 @edge_idx = vaddq_s8(const_2, sign_up)
VADD.I8 Q11,Q11,Q10 @edge_idx = vaddq_s8(edge_idx, sign_down)
VTBL.8 D22,{D6},D22 @vtbl1_s8(edge_idx_tbl, vget_low_s8(edge_idx))
VUZP.8 D22,D23
VTBL.8 D24,{D7},D22
VTBL.8 D25,{D8},D23
VZIP.8 D24,D25
@VTBL.8 D24,D7,D22 @offset = vtbl1_s8(offset_tbl, vget_low_s8(edge_idx))
VMOVL.U8 Q13,D10 @pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(pu1_cur_row)))
VADDW.S8 Q13,Q13,D24 @pi2_tmp_cur_row.val[0] = vaddw_s8(pi2_tmp_cur_row.val[0], offset)
VMAX.S16 Q13,Q13,Q1 @pi2_tmp_cur_row.val[0] = vmaxq_s16(pi2_tmp_cur_row.val[0], const_min_clip)
VMIN.U16 Q13,Q13,Q2 @pi2_tmp_cur_row.val[0] = vreinterpretq_s16_u16(vminq_u16(vreinterpretq_u16_s16(pi2_tmp_cur_row.val[0]), const_max_clip))
VMOVN.I16 D30,Q13 @vmovn_s16(pi2_tmp_cur_row.val[0])
VST1.8 {D30},[r10],r1 @vst1q_u8(pu1_src_cpy, pu1_cur_row)
END_LOOPS:
vpop {d8 - d15}
LDMFD sp!,{r4-r12,r15} @Reload the registers from SP