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_luma_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 #40 91 @ nt 92 @ mode 93 @ pi1_coeff 94 95 .text 96 .align 4 97 98 99 100 101 .globl ihevc_intra_pred_luma_mode_18_34_a9q 102 103 .type ihevc_intra_pred_luma_mode_18_34_a9q, %function 104 105 ihevc_intra_pred_luma_mode_18_34_a9q: 106 107 stmfd sp!, {r4-r12, r14} @stack stores the values of the arguments 108 109 110 ldr r4,[sp,#40] 111 ldr r5,[sp,#44] 112 113 cmp r4,#4 114 beq mode2_4 115 116 mov r11,r4 117 mov r12,r4 118 sub r14,r4,#8 119 120 add r0,r0,r4,lsl #1 121 122 cmp r5,#0x22 123 mov r10,r2 124 125 add r0,r0,#2 126 subne r0,r0,#2 127 moveq r6,#1 128 movne r6,#-1 129 mov r8,r0 130 131 prologue_cpy_32: 132 133 vld1.8 {d0},[r8],r6 134 lsr r1, r4, #3 135 vld1.8 {d1},[r8],r6 136 mul r1, r4, r1 137 vld1.8 {d2},[r8],r6 138 vld1.8 {d3},[r8],r6 139 subs r1,r1,#8 140 vld1.8 {d4},[r8],r6 141 vld1.8 {d5},[r8],r6 142 vld1.8 {d6},[r8],r6 143 144 vld1.8 {d7},[r8],r6 145 146 147 beq epilogue_mode2 148 sub r11,r11,#8 149 150 cmp r5,#0x22 151 addne r0,r0,#8 152 movne r8,r0 153 bne kernel_mode18 154 @add r8,r0,#8 155 156 kernel_mode2: 157 vst1.8 {d0},[r10],r3 158 vst1.8 {d1},[r10],r3 159 subs r12,r12,#8 160 vst1.8 {d2},[r10],r3 161 addne r2,r2,#8 162 vst1.8 {d3},[r10],r3 163 164 vld1.8 {d0},[r8],r6 165 vst1.8 {d4},[r10],r3 166 167 vst1.8 {d5},[r10],r3 168 vld1.8 {d1},[r8],r6 169 vst1.8 {d6},[r10],r3 170 vld1.8 {d2},[r8],r6 171 vst1.8 {d7},[r10],r3 172 173 vld1.8 {d3},[r8],r6 174 subeq r2,r10,r14 175 vld1.8 {d4},[r8],r6 176 mov r10,r2 177 vld1.8 {d5},[r8],r6 178 moveq r12,r4 179 vld1.8 {d6},[r8],r6 180 subs r11,r11,#8 181 182 vld1.8 {d7},[r8],r6 183 184 addeq r0,r0,#8 185 moveq r11,r4 186 moveq r8,r0 187 188 subs r1, r1, #8 189 190 bne kernel_mode2 191 192 b epilogue_mode2 193 194 kernel_mode18: 195 vst1.8 {d0},[r10],r3 196 vst1.8 {d1},[r10],r3 197 subs r12,r12,#8 198 vst1.8 {d2},[r10],r3 199 addne r2,r2,#8 200 vst1.8 {d3},[r10],r3 201 202 vld1.8 {d0},[r8],r6 203 vst1.8 {d4},[r10],r3 204 205 vst1.8 {d5},[r10],r3 206 vld1.8 {d1},[r8],r6 207 208 vst1.8 {d6},[r10],r3 209 vld1.8 {d2},[r8],r6 210 vst1.8 {d7},[r10],r3 211 212 vld1.8 {d3},[r8],r6 213 subeq r2,r10,r14 214 vld1.8 {d4},[r8],r6 215 mov r10,r2 216 vld1.8 {d5},[r8],r6 217 moveq r12,r4 218 vld1.8 {d6},[r8],r6 219 subs r11,r11,#8 220 vld1.8 {d7},[r8],r6 221 222 addne r0,r0,#8 223 moveq r11,r4 224 subeq r0,r8,r14 225 subs r1, r1, #8 226 mov r8,r0 227 228 bne kernel_mode18 229 230 231 epilogue_mode2: 232 233 vst1.8 {d0},[r10],r3 234 vst1.8 {d1},[r10],r3 235 vst1.8 {d2},[r10],r3 236 vst1.8 {d3},[r10],r3 237 vst1.8 {d4},[r10],r3 238 vst1.8 {d5},[r10],r3 239 vst1.8 {d6},[r10],r3 240 vst1.8 {d7},[r10],r3 241 242 b end_func 243 244 mode2_4: 245 246 add r0,r0,#10 247 cmp r5,#0x22 248 subne r0,r0,#2 249 250 moveq r8,#1 251 movne r8,#-1 252 253 vld1.8 {d0},[r0],r8 254 vst1.32 {d0[0]},[r2],r3 255 256 vld1.8 {d0},[r0],r8 257 vst1.32 {d0[0]},[r2],r3 258 259 vld1.8 {d0},[r0],r8 260 vst1.32 {d0[0]},[r2],r3 261 262 vld1.8 {d0},[r0],r8 263 vst1.32 {d0[0]},[r2],r3 264 265 end_func: 266 ldmfd sp!,{r4-r12,r15} @reload the registers from sp 267 268 269 270 271 272 273 274
