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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
| //* ihevcd_itrans_recon_dc_chroma.s
| //*
| //* //brief
| //* contains function definitions itrans and recon for dc only case
| //*
| //* //author
| //* ittiam
| //*
| //* //par list of functions:
| //*
| //*
| //* //remarks
| //* none
| //*
| //*******************************************************************************/
|
|
| .text
| .include "ihevc_neon_macros.s"
|
|
| .globl ihevcd_itrans_recon_dc_chroma_av8
|
| .type ihevcd_itrans_recon_dc_chroma_av8, %function
|
| ihevcd_itrans_recon_dc_chroma_av8:
|
| //void ihevcd_itrans_recon_dc_chroma(uword8 *pu1_pred,
| // uword8 *pu1_dst,
| // word32 pred_strd,
| // word32 dst_strd,
| // word32 log2_trans_size,
| // word16 i2_coeff_value)
|
| //x0:pu1_pred
| //x1:pu1_dest
| //x2:pred_strd
| //x3:dst_strd
|
|
|
| push_v_regs
| stp x19, x20,[sp,#-16]!
|
| sxth x5, w5 // since the argument is of word16, sign extend to x register
|
| mov x10,#1
| lsl x4,x10,x4 // trans_size = (1 << log2_trans_size)//
| mov x6,#64 // 1 << (shift1 - 1)//
| mov x7,#2048 // 1<<(shift2-1)
|
| add x8,x6,x5,lsl #6
| asr x20, x8, #7
| mov x19,#32767
| cmp x20,x19
| blt lbl36
| mov x8,#32767
| b lbl36_1
| lbl36:
| mov x19,#-32768
| cmp x20,x19
| csel x8, x19, x20, lt
| lbl36_1:
|
| add x5,x7,x8,lsl #6
| asr x20, x5, #12
| mov x19,#32767
| cmp x20,x19
| blt lbl38
| mov x6,#32767
| b lbl38_1
| lbl38:
| mov x19,#-32768
| cmp x20,x19
| csel x6, x19, x20, lt
| lbl38_1:
|
| mov x9,x4
| mov x8,x4
|
| // x6 has the dc_value
| // x4 has the trans_size value
| // x8 has the row value
| // x9 has the col value
| dup v0.8h,w6
| cmp x4,#4
| beq row_loop_4chroma
|
|
| row_loop_chroma:
| mov x9,x4
|
|
| col_loop_chroma:
|
| mov x7,x0
| ld2 {v2.8b, v3.8b},[x7],x2
| ld2 {v4.8b, v5.8b},[x7],x2
| ld2 {v6.8b, v7.8b},[x7],x2
| ld2 {v8.8b, v9.8b},[x7],x2
|
| ld2 {v10.8b, v11.8b},[x7],x2
| ld2 {v12.8b, v13.8b},[x7],x2
| ld2 {v14.8b, v15.8b},[x7],x2
| ld2 {v16.8b, v17.8b},[x7]
|
| add x0,x0,#16
|
|
| uaddw v30.8h, v0.8h , v2.8b
| uaddw v28.8h, v0.8h , v4.8b
| uaddw v26.8h, v0.8h , v6.8b
| uaddw v24.8h, v0.8h , v8.8b
| uaddw v22.8h, v0.8h , v10.8b
| uaddw v20.8h, v0.8h , v12.8b
| uaddw v18.8h, v0.8h , v14.8b
|
|
| mov x11,x1
| sqxtun v2.8b, v30.8h
| sqxtun v4.8b, v28.8h
| sqxtun v6.8b, v26.8h
| sqxtun v8.8b, v24.8h
|
| uaddw v30.8h, v0.8h , v16.8b
|
| sqxtun v10.8b, v22.8h
| sqxtun v12.8b, v20.8h
| sqxtun v14.8b, v18.8h
| sqxtun v16.8b, v30.8h
|
| st2 {v2.8b, v3.8b},[x11],x3
| st2 {v4.8b, v5.8b},[x11],x3
| st2 {v6.8b, v7.8b},[x11],x3
| st2 {v8.8b, v9.8b},[x11],x3
|
| st2 {v10.8b, v11.8b},[x11],x3
| st2 {v12.8b, v13.8b},[x11],x3
| st2 {v14.8b, v15.8b},[x11],x3
| st2 {v16.8b, v17.8b},[x11]
|
| add x1,x1,#16
|
| subs x9,x9,#8
| bgt col_loop_chroma
|
| subs x8,x8,#8
|
| add x0,x0,x2,lsl #3
| add x1,x1,x3,lsl #3
| sub x0,x0,x4,lsl #1
| sub x1,x1,x4,lsl #1
| bgt row_loop_chroma
| b end_loops_chroma
|
|
| row_loop_4chroma:
| mov x9,x10
|
|
| col_loop_4chroma:
|
|
| ld2 {v2.8b, v3.8b},[x0],x2
| ld2 {v4.8b, v5.8b},[x0],x2
| ld2 {v6.8b, v7.8b},[x0],x2
| ld2 {v8.8b, v9.8b},[x0]
|
|
|
|
| uaddw v30.8h, v0.8h , v2.8b
| uaddw v28.8h, v0.8h , v4.8b
| uaddw v26.8h, v0.8h , v6.8b
| uaddw v24.8h, v0.8h , v8.8b
|
|
|
| sqxtun v31.8b, v30.8h
| sqxtun v29.8b, v28.8h
| sqxtun v27.8b, v26.8h
| sqxtun v25.8b, v24.8h
|
|
| zip1 v2.8b, v31.8b, v3.8b
| zip1 v4.8b, v29.8b, v5.8b
| zip1 v6.8b, v27.8b, v7.8b
| zip1 v8.8b, v25.8b, v9.8b
|
| st1 {v2.2s},[x1],x3
| st1 {v4.2s},[x1],x3
| st1 {v6.2s},[x1],x3
| st1 {v8.2s},[x1]
|
| end_loops_chroma:
| ldp x19, x20,[sp],#16
| pop_v_regs
| ret
|
|
