@/*****************************************************************************
@*
@* 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_luma.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_luma(UWORD8 *pu1_src,
@ WORD32 src_strd,
@ UWORD8 *pu1_src_left,
@ UWORD8 *pu1_src_top,
@ UWORD8 *pu1_src_top_left,
@ WORD32 sao_band_pos,
@ WORD8 *pi1_sao_offset,
@ 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
@r6 => *pi1_sao_offset
@r7 => wd
@r8 => ht
.text
.p2align 2
.extern gu1_table_band_idx
.globl ihevc_sao_band_offset_luma_a9q
gu1_table_band_idx_addr:
.long gu1_table_band_idx - ulbl1 - 8
ihevc_sao_band_offset_luma_a9q:
STMFD sp!, {r4-r12, r14} @stack stores the values of the arguments
LDR r8,[sp,#56] @Loads ht
LDR r7,[sp,#52] @Loads wd
MOV r9,r8 @Move the ht to r9 for loop counter
LDR r5,[sp,#44] @Loads sao_band_pos
ADD r10,r0,r7 @pu1_src[row * src_strd + (wd)]
LDR r4,[sp,#40] @Loads pu1_src_top_left
SUB r10,r10,#1 @wd-1
LDR r14, gu1_table_band_idx_addr
ulbl1:
add r14,r14,pc
SRC_LEFT_LOOP:
LDRB r11,[r10],r1 @Load the value
SUBS r9,r9,#1 @Decrement the loop counter
STRB r11,[r2],#1 @Store the value in pu1_src_left pointer
BNE SRC_LEFT_LOOP
ADD r9,r3,r7 @pu1_src_top[wd]
VLD1.8 D1,[r14]! @band_table.val[0]
LDR r6,[sp,#48] @Loads pi1_sao_offset
LSL r11,r5,#3
VLD1.8 D2,[r14]! @band_table.val[1]
LDRB r10,[r9,#-1]
VDUP.8 D31,r11 @band_pos
SUB r12,r8,#1 @ht-1
STRB r10,[r4] @store to pu1_src_top_left[0]
VLD1.8 D3,[r14]! @band_table.val[2]
MUL r12,r12,r1 @ht-1 * src_strd
ADD r4,r12,r0 @pu1_src[(ht - 1) * src_strd]
VLD1.8 D4,[r14]! @band_table.val[3]
MOV r9,r7 @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 r9,r9,#8 @Decrement the loop counter by 8
VST1.8 D0,[r3]! @Store to pu1_src_top[col]
BNE SRC_TOP_LOOP
VLD1.8 D30,[r6] @pi1_sao_offset load
VADD.I8 D5,D1,D31 @band_table.val[0] = vadd_u8(band_table.val[0], band_pos)
VDUP.8 D29,D30[1] @vdup_n_u8(pi1_sao_offset[1])
VADD.I8 D6,D2,D31 @band_table.val[1] = vadd_u8(band_table.val[1], band_pos)
VDUP.8 D28,D30[2] @vdup_n_u8(pi1_sao_offset[2])
VADD.I8 D7,D3,D31 @band_table.val[2] = vadd_u8(band_table.val[2], band_pos)
VDUP.8 D27,D30[3] @vdup_n_u8(pi1_sao_offset[3])
VADD.I8 D8,D4,D31 @band_table.val[3] = vadd_u8(band_table.val[3], band_pos)
VDUP.8 D26,D30[4] @vdup_n_u8(pi1_sao_offset[4])
VADD.I8 D1,D5,D29 @band_table.val[0] = vadd_u8(band_table.val[0], vdup_n_u8(pi1_sao_offset[1]))
VMOV.I8 D29,#16 @vdup_n_u8(16)
VADD.I8 D2,D6,D28 @band_table.val[1] = vadd_u8(band_table.val[1], vdup_n_u8(pi1_sao_offset[2]))
CMP r5,#28
VADD.I8 D3,D7,D27 @band_table.val[2] = vadd_u8(band_table.val[2], vdup_n_u8(pi1_sao_offset[3]))
VADD.I8 D4,D8,D26 @band_table.val[3] = vadd_u8(band_table.val[3], vdup_n_u8(pi1_sao_offset[4]))
BLT SAO_BAND_POS_0
SAO_BAND_POS_28: @case 28
VCLE.U8 D12,D4,D29 @vcle_u8(band_table.val[3], vdup_n_u8(16))
BNE SAO_BAND_POS_29
VORR.U8 D4,D4,D12 @band_table.val[3] = vorr_u8(band_table.val[3], au1_cmp)
B SWITCH_BREAK
SAO_BAND_POS_29: @case 29
CMP r5,#29
VCLE.U8 D11,D3,D29 @vcle_u8(band_table.val[2], vdup_n_u8(16))
BNE SAO_BAND_POS_30
VORR.U8 D3,D3,D11 @band_table.val[2] = vorr_u8(band_table.val[2], au1_cmp)
VAND.U8 D4,D4,D12 @band_table.val[3] = vand_u8(band_table.val[3], au1_cmp)
B SWITCH_BREAK
SAO_BAND_POS_30: @case 30
CMP r5,#30
VCLE.U8 D10,D2,D29 @vcle_u8(band_table.val[1], vdup_n_u8(16))
BNE SAO_BAND_POS_31
VORR.U8 D2,D2,D10 @band_table.val[1] = vorr_u8(band_table.val[1], au1_cmp)
VAND.U8 D3,D3,D11 @band_table.val[2] = vand_u8(band_table.val[2], au1_cmp)
B SWITCH_BREAK
SAO_BAND_POS_31: @case 31
CMP r5,#31
BNE SWITCH_BREAK
VCLE.U8 D9,D1,D29 @vcle_u8(band_table.val[0], vdup_n_u8(16))
VORR.U8 D1,D1,D9 @band_table.val[0] = vorr_u8(band_table.val[0], au1_cmp)
VAND.U8 D2,D2,D10 @band_table.val[1] = vand_u8(band_table.val[1], au1_cmp)
SAO_BAND_POS_0:
CMP r5,#0 @case 0
BNE SWITCH_BREAK
VCLE.U8 D9,D1,D29 @vcle_u8(band_table.val[0], vdup_n_u8(16))
VAND.U8 D1,D1,D9 @band_table.val[0] = vand_u8(band_table.val[0], au1_cmp)
SWITCH_BREAK:
MOV r4,r0 @pu1_src_cpy
MOV r11,r8 @move ht
ADD r5,r4,r1
HEIGHT_LOOP:
ADD r6,r5,r1
VLD1.8 D13,[r4] @au1_cur_row = vld1_u8(pu1_src_cpy)
ADD r10,r6,r1
VLD1.8 D15,[r5] @au1_cur_row = vld1_u8(pu1_src_cpy)
VLD1.8 D17,[r6] @au1_cur_row = vld1_u8(pu1_src_cpy)
VLD1.8 D19,[r10] @au1_cur_row = vld1_u8(pu1_src_cpy)
VSUB.I8 D14,D13,D31 @vsub_u8(au1_cur_row, band_pos)
VTBX.8 D13,{D1-D4},D14 @vtbx4_u8(au1_cur_row, band_table, vsub_u8(au1_cur_row, band_pos))
VSUB.I8 D16,D15,D31 @vsub_u8(au1_cur_row, band_pos)
VTBX.8 D15,{D1-D4},D16 @vtbx4_u8(au1_cur_row, band_table, vsub_u8(au1_cur_row, band_pos))
VSUB.I8 D18,D17,D31 @vsub_u8(au1_cur_row, band_pos)
VTBX.8 D17,{D1-D4},D18 @vtbx4_u8(au1_cur_row, band_table, vsub_u8(au1_cur_row, band_pos))
VSUB.I8 D20,D19,D31 @vsub_u8(au1_cur_row, band_pos)
VTBX.8 D19,{D1-D4},D20 @vtbx4_u8(au1_cur_row, band_table, vsub_u8(au1_cur_row, band_pos))
VST1.8 D13,[r4],r1 @vst1_u8(pu1_src_cpy, au1_cur_row)
VST1.8 D15,[r5] @vst1_u8(pu1_src_cpy, au1_cur_row)
SUBS r11,r11,#4 @Decrement the ht loop count by 4
VST1.8 D17,[r6],r1 @vst1_u8(pu1_src_cpy, au1_cur_row)
ADD r4,r6,r1
VST1.8 D19,[r10] @vst1_u8(pu1_src_cpy, au1_cur_row)
ADD r5,r4,r1
BNE HEIGHT_LOOP
SUBS r7,r7,#8 @Decrement the width loop by 8
ADD r0,r0,#8
BNE SWITCH_BREAK
LDMFD sp!,{r4-r12,r15} @Reload the registers from SP