@/***************************************************************************** @* @* 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