| @/***************************************************************************** |
| @* |
| @* 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 |
| |
| |
| |
| |
