| ///***************************************************************************** |
| //* |
| //* 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_intra_pred_chroma_ver_neon.s |
| //* |
| //* @brief |
| //* contains function definitions for intra prediction dc filtering. |
| //* functions are coded using neon intrinsics and can be compiled using |
| |
| //* rvct |
| //* |
| //* @author |
| //* yogeswaran rs |
| //* |
| //* @par list of functions: |
| //* |
| //* |
| //* @remarks |
| //* none |
| //* |
| //******************************************************************************* |
| //*/ |
| ///** |
| //******************************************************************************* |
| //* |
| //* @brief |
| //* luma intraprediction filter for dc input |
| //* |
| //* @par description: |
| //* |
| //* @param[in] pu1_ref |
| //* uword8 pointer to the source |
| //* |
| //* @param[out] pu1_dst |
| //* uword8 pointer to the destination |
| //* |
| //* @param[in] src_strd |
| //* integer source stride |
| //* |
| //* @param[in] dst_strd |
| //* integer destination stride |
| //* |
| //* @param[in] nt |
| //* size of tranform block |
| //* |
| //* @param[in] mode |
| //* type of filtering |
| //* |
| //* @returns |
| //* |
| //* @remarks |
| //* none |
| //* |
| //******************************************************************************* |
| //*/ |
| |
| //void ihevc_intra_pred_chroma_ver(uword8 *pu1_ref, |
| // word32 src_strd, |
| // uword8 *pu1_dst, |
| // word32 dst_strd, |
| // word32 nt, |
| // word32 mode) |
| //**************variables vs registers***************************************** |
| //x0 => *pu1_ref |
| //x1 => src_strd |
| //x2 => *pu1_dst |
| //x3 => dst_strd |
| |
| //stack contents from #40 |
| // nt |
| // mode |
| |
| .text |
| .align 4 |
| .include "ihevc_neon_macros.s" |
| |
| |
| .globl ihevc_intra_pred_chroma_ver_av8 |
| |
| .type ihevc_intra_pred_chroma_ver_av8, %function |
| |
| ihevc_intra_pred_chroma_ver_av8: |
| |
| // stmfd sp!, {x4-x12, x14} //stack stores the values of the arguments |
| push_v_regs |
| stp x19, x20,[sp,#-16]! |
| |
| lsl x5, x4, #2 //4nt |
| |
| |
| cmp x4, #8 |
| beq blk_8 |
| blt blk_4 |
| |
| copy_16: |
| add x5, x5, #2 //2nt+2 |
| add x6, x0, x5 //&src[2nt+1] |
| |
| add x5, x2, x3 //pu1_dst + dst_strd |
| ld2 {v20.8b, v21.8b}, [x6],#16 //16 loads (col 0:15) |
| add x8, x5, x3 |
| |
| add x10, x8, x3 |
| ld2 {v22.8b, v23.8b}, [x6] //16 loads (col 16:31) |
| lsl x11, x3, #2 |
| |
| sub x11, x11, #16 |
| |
| |
| st2 {v20.8b, v21.8b}, [x2],#16 |
| st2 {v20.8b, v21.8b}, [x5],#16 |
| st2 {v20.8b, v21.8b}, [x8],#16 |
| st2 {v20.8b, v21.8b}, [x10],#16 |
| |
| st2 {v22.8b, v23.8b}, [x2], x11 |
| st2 {v22.8b, v23.8b}, [x5], x11 |
| st2 {v22.8b, v23.8b}, [x8], x11 |
| st2 {v22.8b, v23.8b}, [x10], x11 |
| |
| subs x4, x4, #4 |
| |
| kernel_copy_16: |
| st2 {v20.8b, v21.8b}, [x2],#16 |
| st2 {v20.8b, v21.8b}, [x5],#16 |
| st2 {v20.8b, v21.8b}, [x8],#16 |
| st2 {v20.8b, v21.8b}, [x10],#16 |
| |
| st2 {v22.8b, v23.8b}, [x2], x11 |
| st2 {v22.8b, v23.8b}, [x5], x11 |
| st2 {v22.8b, v23.8b}, [x8], x11 |
| st2 {v22.8b, v23.8b}, [x10], x11 |
| |
| subs x4, x4, #4 |
| |
| |
| st2 {v20.8b, v21.8b}, [x2],#16 |
| st2 {v20.8b, v21.8b}, [x5],#16 |
| st2 {v20.8b, v21.8b}, [x8],#16 |
| st2 {v20.8b, v21.8b}, [x10],#16 |
| |
| st2 {v22.8b, v23.8b}, [x2], x11 |
| st2 {v22.8b, v23.8b}, [x5], x11 |
| st2 {v22.8b, v23.8b}, [x8], x11 |
| st2 {v22.8b, v23.8b}, [x10], x11 |
| |
| subs x4, x4, #4 |
| |
| st2 {v20.8b, v21.8b}, [x2],#16 |
| st2 {v20.8b, v21.8b}, [x5],#16 |
| st2 {v20.8b, v21.8b}, [x8],#16 |
| st2 {v20.8b, v21.8b}, [x10],#16 |
| |
| st2 {v22.8b, v23.8b}, [x2], x11 |
| st2 {v22.8b, v23.8b}, [x5], x11 |
| st2 {v22.8b, v23.8b}, [x8], x11 |
| st2 {v22.8b, v23.8b}, [x10], x11 |
| |
| subs x4, x4, #4 |
| bne kernel_copy_16 |
| |
| b end_func |
| |
| blk_8: |
| |
| add x5, x5, #2 //2nt+2 |
| add x6, x0, x5 //&src[2nt+1] |
| |
| add x5, x2, x3 //pu1_dst + dst_strd |
| ld2 {v20.8b, v21.8b}, [x6],#16 //16 loads (col 0:15) |
| add x8, x5, x3 |
| |
| add x10, x8, x3 |
| ld2 {v22.8b, v23.8b}, [x6] //16 loads (col 16:31) |
| |
| lsl x11,x3,#2 |
| |
| st2 {v20.8b, v21.8b}, [x2],x11 |
| st2 {v20.8b, v21.8b}, [x5],x11 |
| st2 {v20.8b, v21.8b}, [x8],x11 |
| st2 {v20.8b, v21.8b}, [x10],x11 |
| |
| st2 {v20.8b, v21.8b}, [x2] |
| st2 {v20.8b, v21.8b}, [x5] |
| st2 {v20.8b, v21.8b}, [x8] |
| st2 {v20.8b, v21.8b}, [x10] |
| |
| subs x4, x4, #8 |
| beq end_func |
| |
| blk_4: |
| |
| //lsl x5, x4, #2 @4nt |
| add x5, x5, #2 //2nt+2 |
| add x6, x0, x5 //&src[2nt+1] |
| |
| ld1 {v0.8b},[x6] |
| add x5, x2, x3 //pu1_dst + dst_strd |
| |
| st1 {v0.8b},[x2] |
| add x8, x5, x3 |
| st1 {v0.8b},[x5] |
| add x10, x8, x3 |
| st1 {v0.8b},[x8] |
| st1 {v0.8b},[x10] |
| |
| |
| |
| end_func: |
| // ldmfd sp!,{x4-x12,x15} //reload the registers from sp |
| ldp x19, x20,[sp],#16 |
| pop_v_regs |
| ret |
| |
| |
| |
