1 @/***************************************************************************** 2 @* 3 @* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore 4 @* 5 @* Licensed under the Apache License, Version 2.0 (the "License"); 6 @* you may not use this file except in compliance with the License. 7 @* You may obtain a copy of the License at: 8 @* 9 @* http://www.apache.org/licenses/LICENSE-2.0 10 @* 11 @* Unless required by applicable law or agreed to in writing, software 12 @* distributed under the License is distributed on an "AS IS" BASIS, 13 @* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 @* See the License for the specific language governing permissions and 15 @* limitations under the License. 16 @* 17 @*****************************************************************************/ 18 @/** 19 @******************************************************************************* 20 @* @file 21 @* ihevc_intra_pred_luma_mode_18_34_neon.s 22 @* 23 @* @brief 24 @* contains function definitions for intra prediction dc filtering. 25 @* functions are coded using neon intrinsics and can be compiled using 26 27 @* rvct 28 @* 29 @* @author 30 @* yogeswaran rs 31 @* 32 @* @par list of functions: 33 @* 34 @* 35 @* @remarks 36 @* none 37 @* 38 @******************************************************************************* 39 @*/ 40 @/** 41 @******************************************************************************* 42 @* 43 @* @brief 44 @* luma intraprediction filter for dc input 45 @* 46 @* @par description: 47 @* 48 @* @param[in] pu1_ref 49 @* uword8 pointer to the source 50 @* 51 @* @param[out] pu1_dst 52 @* uword8 pointer to the destination 53 @* 54 @* @param[in] src_strd 55 @* integer source stride 56 @* 57 @* @param[in] dst_strd 58 @* integer destination stride 59 @* 60 @* @param[in] pi1_coeff 61 @* word8 pointer to the planar coefficients 62 @* 63 @* @param[in] nt 64 @* size of tranform block 65 @* 66 @* @param[in] mode 67 @* type of filtering 68 @* 69 @* @returns 70 @* 71 @* @remarks 72 @* none 73 @* 74 @******************************************************************************* 75 @*/ 76 77 @void ihevc_intra_pred_chroma_mode_18_34(uword8 *pu1_ref, 78 @ word32 src_strd, 79 @ uword8 *pu1_dst, 80 @ word32 dst_strd, 81 @ word32 nt, 82 @ word32 mode) 83 @ 84 @**************variables vs registers***************************************** 85 @r0 => *pu1_ref 86 @r1 => src_strd 87 @r2 => *pu1_dst 88 @r3 => dst_strd 89 90 @stack contents from #104 91 @ nt 92 @ mode 93 @ pi1_coeff 94 95 .equ nt_offset, 104 96 .equ mode_offset, 108 97 98 .text 99 .align 4 100 101 102 103 104 .globl ihevc_intra_pred_chroma_mode_18_34_a9q 105 106 .type ihevc_intra_pred_chroma_mode_18_34_a9q, %function 107 108 ihevc_intra_pred_chroma_mode_18_34_a9q: 109 110 stmfd sp!, {r4-r12, r14} @stack stores the values of the arguments 111 vpush {d8 - d15} 112 113 ldr r4,[sp,#nt_offset] 114 ldr r5,[sp,#mode_offset] 115 116 cmp r4,#4 117 beq mode2_4 118 119 mov r12,r4 120 mov r11,r4 121 add r0,r0,r4,lsl #2 122 123 cmp r5,#0x22 124 mov r10,r2 125 126 add r0,r0,#4 127 128 subne r0,r0,#4 129 moveq r6,#2 130 movne r6,#-2 131 mov r8,r0 132 133 134 kernel: 135 136 137 vld1.8 {d0,d1},[r8],r6 138 vst1.8 {d0,d1},[r10],r3 139 vld1.8 {d2,d3},[r8],r6 140 vst1.8 {d2,d3},[r10],r3 141 vld1.8 {d4,d5},[r8],r6 142 vst1.8 {d4,d5},[r10],r3 143 vld1.8 {d6,d7},[r8],r6 144 vst1.8 {d6,d7},[r10],r3 145 vld1.8 {d8,d9},[r8],r6 146 vst1.8 {d8,d9},[r10],r3 147 vld1.8 {d10,d11},[r8],r6 148 vst1.8 {d10,d11},[r10],r3 149 vld1.8 {d12,d13},[r8],r6 150 vst1.8 {d12,d13},[r10],r3 151 vld1.8 {d14,d15},[r8],r6 152 vst1.8 {d14,d15},[r10],r3 153 154 subs r12,r12,#8 155 bne kernel 156 157 cmp r11,#16 158 add r8,r0,#16 159 add r10,r2,#16 160 sub r11,#16 161 mov r12,#16 162 beq kernel 163 b end_func 164 165 mode2_4: 166 167 add r0,r0,#20 168 cmp r5,#0x22 169 subne r0,r0,#4 170 171 moveq r8,#2 172 movne r8,#-2 173 174 vld1.8 {d0},[r0],r8 175 vst1.32 {d0},[r2],r3 176 177 vld1.8 {d0},[r0],r8 178 vst1.32 {d0},[r2],r3 179 180 vld1.8 {d0},[r0],r8 181 vst1.32 {d0},[r2],r3 182 183 vld1.8 {d0},[r0],r8 184 vst1.32 {d0},[r2],r3 185 186 end_func: 187 vpop {d8 - d15} 188 ldmfd sp!,{r4-r12,r15} @reload the registers from sp 189 190 191 192 193 194 195
