| ///***************************************************************************** |
| //* |
| //* 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_luma_mode2_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] pi1_coeff |
| //* word8 pointer to the planar coefficients |
| //* |
| //* @param[in] nt |
| //* size of tranform block |
| //* |
| //* @param[in] mode |
| //* type of filtering |
| //* |
| //* @returns |
| //* |
| //* @remarks |
| //* none |
| //* |
| //******************************************************************************* |
| //*/ |
| |
| //void ihevc_intra_pred_luma_mode2(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 |
| // pi1_coeff |
| |
| .text |
| .align 4 |
| .include "ihevc_neon_macros.s" |
| |
| |
| |
| .globl ihevc_intra_pred_luma_mode2_av8 |
| |
| .type ihevc_intra_pred_luma_mode2_av8, %function |
| |
| ihevc_intra_pred_luma_mode2_av8: |
| |
| // stmfd sp!, {x4-x12, x14} //stack stores the values of the arguments |
| |
| stp x19, x20,[sp,#-16]! |
| |
| mov x8,#-2 |
| |
| cmp x4,#4 |
| beq mode2_4 |
| |
| add x0,x0,x4,lsl #1 |
| |
| sub x0,x0,#9 //src[1] |
| sub x10,x0,#1 |
| |
| prologue_cpy_32: |
| |
| ld1 {v0.8b},[x0],x8 |
| mov x11,x4 |
| |
| ld1 {v1.8b},[x10],x8 |
| mov x6, x2 |
| |
| ld1 {v2.8b},[x0],x8 |
| ld1 {v3.8b},[x10],x8 |
| lsr x1, x4, #3 |
| |
| ld1 {v4.8b},[x0],x8 |
| ld1 {v5.8b},[x10],x8 |
| ld1 {v6.8b},[x0],x8 |
| mul x1, x4, x1 |
| |
| ld1 {v7.8b},[x10],x8 |
| add x7,x6,x3 |
| |
| rev64 v16.8b, v0.8b |
| rev64 v17.8b, v1.8b |
| lsl x5, x3, #2 |
| |
| rev64 v18.8b, v2.8b |
| rev64 v19.8b, v3.8b |
| add x9,x7,x3 |
| |
| rev64 v20.8b, v4.8b |
| subs x1,x1,#8 |
| |
| rev64 v21.8b, v5.8b |
| rev64 v22.8b, v6.8b |
| rev64 v23.8b, v7.8b |
| add x14,x9,x3 |
| |
| beq epilogue_mode2 |
| |
| sub x12,x4,#8 |
| |
| kernel_mode2: |
| |
| st1 {v16.8b},[x6],x5 |
| st1 {v17.8b},[x7],x5 |
| subs x11,x11,#8 |
| |
| st1 {v18.8b},[x9],x5 |
| add x20,x2,#8 |
| csel x2, x20, x2,gt |
| |
| st1 {v19.8b},[x14],x5 |
| st1 {v20.8b},[x6],x5 |
| csel x11, x4, x11,le |
| |
| st1 {v21.8b},[x7],x5 |
| st1 {v22.8b},[x9],x5 |
| add x20, x2, x3, lsl #2 |
| csel x2, x20, x2,le |
| |
| st1 {v23.8b},[x14],x5 |
| ld1 {v0.8b},[x0],x8 |
| sub x14,x4,#8 |
| |
| ld1 {v1.8b},[x10],x8 |
| ld1 {v2.8b},[x0],x8 |
| add x20, x2, #8 |
| csel x2, x20, x2,le |
| |
| ld1 {v3.8b},[x10],x8 |
| ld1 {v4.8b},[x0],x8 |
| sub x20, x6, x14 |
| csel x2, x20, x2,le |
| |
| ld1 {v5.8b},[x10],x8 |
| subs x12,x12,#8 |
| |
| ld1 {v6.8b},[x0],x8 |
| mov x6, x2 |
| |
| ld1 {v7.8b},[x10],x8 |
| add x20, x0, x4 |
| csel x0, x20, x0,le |
| |
| rev64 v16.8b, v0.8b |
| add x7, x6, x3 |
| |
| rev64 v17.8b, v1.8b |
| sub x20, x0, #8 |
| csel x0, x20, x0,le |
| |
| rev64 v18.8b, v2.8b |
| csel x12, x4, x12,le |
| |
| rev64 v19.8b, v3.8b |
| add x9, x7, x3 |
| |
| rev64 v20.8b, v4.8b |
| sub x10,x0,#1 |
| |
| rev64 v21.8b, v5.8b |
| subs x1, x1, #8 |
| |
| rev64 v22.8b, v6.8b |
| add x14, x9, x3 |
| |
| rev64 v23.8b, v7.8b |
| |
| bne kernel_mode2 |
| |
| epilogue_mode2: |
| |
| st1 {v16.8b},[x6],x5 |
| st1 {v17.8b},[x7],x5 |
| st1 {v18.8b},[x9],x5 |
| st1 {v19.8b},[x14],x5 |
| st1 {v20.8b},[x6],x5 |
| st1 {v21.8b},[x7],x5 |
| st1 {v22.8b},[x9],x5 |
| st1 {v23.8b},[x14],x5 |
| |
| b end_func |
| |
| mode2_4: |
| |
| mov x8,#-2 |
| sub x0,x0,#1 |
| sub x10,x0,#1 |
| |
| ld1 {v0.8b},[x0],x8 |
| add x5,x2,x3 |
| ld1 {v2.8b},[x10],x8 |
| add x6,x5,x3 |
| ld1 {v4.8b},[x0] |
| add x7,x6,x3 |
| ld1 {v6.8b},[x10] |
| |
| rev64 v1.8b, v0.8b |
| rev64 v3.8b, v2.8b |
| |
| |
| |
| st1 {v1.s}[0],[x2] |
| rev64 v5.8b, v4.8b |
| st1 {v3.s}[0],[x5] |
| rev64 v7.8b, v6.8b |
| st1 {v5.s}[0],[x6] |
| st1 {v7.s}[0],[x7] |
| |
| end_func: |
| // ldmfd sp!,{x4-x12,x15} //reload the registers from sp |
| ldp x19, x20,[sp],#16 |
| |
| ret |
| |
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