233 lines
6.0 KiB
ArmAsm
233 lines
6.0 KiB
ArmAsm
///*****************************************************************************
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//*
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//* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
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//*
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//* Licensed under the Apache License, Version 2.0 (the "License");
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//* you may not use this file except in compliance with the License.
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//* You may obtain a copy of the License at:
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//*
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//* http://www.apache.org/licenses/LICENSE-2.0
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//*
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//* Unless required by applicable law or agreed to in writing, software
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//* distributed under the License is distributed on an "AS IS" BASIS,
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//* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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//* See the License for the specific language governing permissions and
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//* limitations under the License.
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//*
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//*****************************************************************************/
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///**
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//*******************************************************************************
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//* @file
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//* ihevc_intra_pred_chroma_ver_neon.s
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//*
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//* @brief
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//* contains function definitions for intra prediction dc filtering.
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//* functions are coded using neon intrinsics and can be compiled using
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//* rvct
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//*
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//* @author
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//* yogeswaran rs
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//*
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//* @par list of functions:
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//*
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//*
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//* @remarks
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//* none
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//*
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//*******************************************************************************
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//*/
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///**
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//*******************************************************************************
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//*
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//* @brief
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//* luma intraprediction filter for dc input
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//*
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//* @par description:
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//*
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//* @param[in] pu1_ref
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//* uword8 pointer to the source
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//*
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//* @param[out] pu1_dst
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//* uword8 pointer to the destination
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//*
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//* @param[in] src_strd
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//* integer source stride
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//*
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//* @param[in] dst_strd
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//* integer destination stride
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//*
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//* @param[in] nt
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//* size of tranform block
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//*
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//* @param[in] mode
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//* type of filtering
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//*
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//* @returns
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//*
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//* @remarks
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//* none
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//*
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//*******************************************************************************
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//*/
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//void ihevc_intra_pred_chroma_ver(uword8 *pu1_ref,
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// word32 src_strd,
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// uword8 *pu1_dst,
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// word32 dst_strd,
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// word32 nt,
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// word32 mode)
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//**************variables vs registers*****************************************
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//x0 => *pu1_ref
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//x1 => src_strd
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//x2 => *pu1_dst
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//x3 => dst_strd
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//stack contents from #40
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// nt
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// mode
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.text
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.align 4
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.include "ihevc_neon_macros.s"
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.globl ihevc_intra_pred_chroma_ver_av8
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.type ihevc_intra_pred_chroma_ver_av8, %function
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ihevc_intra_pred_chroma_ver_av8:
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// stmfd sp!, {x4-x12, x14} //stack stores the values of the arguments
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push_v_regs
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stp x19, x20,[sp,#-16]!
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lsl x5, x4, #2 //4nt
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cmp x4, #8
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beq blk_8
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blt blk_4
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copy_16:
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add x5, x5, #2 //2nt+2
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add x6, x0, x5 //&src[2nt+1]
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add x5, x2, x3 //pu1_dst + dst_strd
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ld2 {v20.8b, v21.8b}, [x6],#16 //16 loads (col 0:15)
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add x8, x5, x3
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add x10, x8, x3
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ld2 {v22.8b, v23.8b}, [x6] //16 loads (col 16:31)
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lsl x11, x3, #2
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sub x11, x11, #16
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st2 {v20.8b, v21.8b}, [x2],#16
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st2 {v20.8b, v21.8b}, [x5],#16
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st2 {v20.8b, v21.8b}, [x8],#16
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st2 {v20.8b, v21.8b}, [x10],#16
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st2 {v22.8b, v23.8b}, [x2], x11
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st2 {v22.8b, v23.8b}, [x5], x11
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st2 {v22.8b, v23.8b}, [x8], x11
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st2 {v22.8b, v23.8b}, [x10], x11
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subs x4, x4, #4
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kernel_copy_16:
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st2 {v20.8b, v21.8b}, [x2],#16
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st2 {v20.8b, v21.8b}, [x5],#16
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st2 {v20.8b, v21.8b}, [x8],#16
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st2 {v20.8b, v21.8b}, [x10],#16
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st2 {v22.8b, v23.8b}, [x2], x11
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st2 {v22.8b, v23.8b}, [x5], x11
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st2 {v22.8b, v23.8b}, [x8], x11
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st2 {v22.8b, v23.8b}, [x10], x11
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subs x4, x4, #4
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st2 {v20.8b, v21.8b}, [x2],#16
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st2 {v20.8b, v21.8b}, [x5],#16
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st2 {v20.8b, v21.8b}, [x8],#16
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st2 {v20.8b, v21.8b}, [x10],#16
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st2 {v22.8b, v23.8b}, [x2], x11
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st2 {v22.8b, v23.8b}, [x5], x11
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st2 {v22.8b, v23.8b}, [x8], x11
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st2 {v22.8b, v23.8b}, [x10], x11
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subs x4, x4, #4
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st2 {v20.8b, v21.8b}, [x2],#16
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st2 {v20.8b, v21.8b}, [x5],#16
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st2 {v20.8b, v21.8b}, [x8],#16
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st2 {v20.8b, v21.8b}, [x10],#16
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st2 {v22.8b, v23.8b}, [x2], x11
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st2 {v22.8b, v23.8b}, [x5], x11
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st2 {v22.8b, v23.8b}, [x8], x11
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st2 {v22.8b, v23.8b}, [x10], x11
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subs x4, x4, #4
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bne kernel_copy_16
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b end_func
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blk_8:
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add x5, x5, #2 //2nt+2
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add x6, x0, x5 //&src[2nt+1]
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add x5, x2, x3 //pu1_dst + dst_strd
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ld2 {v20.8b, v21.8b}, [x6],#16 //16 loads (col 0:15)
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add x8, x5, x3
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add x10, x8, x3
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ld2 {v22.8b, v23.8b}, [x6] //16 loads (col 16:31)
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lsl x11,x3,#2
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st2 {v20.8b, v21.8b}, [x2],x11
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st2 {v20.8b, v21.8b}, [x5],x11
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st2 {v20.8b, v21.8b}, [x8],x11
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st2 {v20.8b, v21.8b}, [x10],x11
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st2 {v20.8b, v21.8b}, [x2]
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st2 {v20.8b, v21.8b}, [x5]
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st2 {v20.8b, v21.8b}, [x8]
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st2 {v20.8b, v21.8b}, [x10]
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subs x4, x4, #8
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beq end_func
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blk_4:
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//lsl x5, x4, #2 @4nt
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add x5, x5, #2 //2nt+2
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add x6, x0, x5 //&src[2nt+1]
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ld1 {v0.8b},[x6]
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add x5, x2, x3 //pu1_dst + dst_strd
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st1 {v0.8b},[x2]
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add x8, x5, x3
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st1 {v0.8b},[x5]
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add x10, x8, x3
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st1 {v0.8b},[x8]
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st1 {v0.8b},[x10]
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end_func:
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// ldmfd sp!,{x4-x12,x15} //reload the registers from sp
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ldp x19, x20,[sp],#16
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pop_v_regs
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ret
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