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| ///*****************************************************************************
| //*
| //* 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
|
|
