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 108ihevc_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 134kernel: 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 165mode2_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 186end_func: 187 vpop {d8 - d15} 188 ldmfd sp!,{r4-r12,r15} @reload the registers from sp 189 190 191 192 193 194 195