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359 lines
14 KiB
ArmAsm
359 lines
14 KiB
ArmAsm
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//******************************************************************************
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//*
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//* Copyright (C) 2015 The Android Open Source Project
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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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//* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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//*/
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///**
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//******************************************************************************
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//* @file
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//* ih264_default_weighted_pred_av8.s
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//*
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//* @brief
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//* Contains function definitions for default weighted prediction.
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//*
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//* @author
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//* Kaushik Senthoor R
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//*
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//* @par List of Functions:
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//*
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//* - ih264_default_weighted_pred_luma_av8()
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//* - ih264_default_weighted_pred_chroma_av8()
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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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//* @function
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//* ih264_default_weighted_pred_luma_av8()
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//*
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//* @brief
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//* This routine performs the default weighted prediction as described in sec
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//* 8.4.2.3.1 titled "Default weighted sample prediction process" for luma.
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//*
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//* @par Description:
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//* This function gets two ht x wd blocks, calculates their rounded-average and
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//* stores it in the destination block.
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//*
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//* @param[in] puc_src1:
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//* UWORD8 Pointer to the buffer containing the first input block.
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//*
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//* @param[in] puc_src2:
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//* UWORD8 Pointer to the buffer containing the second input block.
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//*
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//* @param[out] puc_dst
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//* UWORD8 pointer to the destination where the output block is stored.
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//*
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//* @param[in] src_strd1
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//* Stride of the first input buffer
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//*
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//* @param[in] src_strd2
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//* Stride of the second input buffer
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//*
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//* @param[in] dst_strd
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//* Stride of the destination buffer
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//*
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//* @param[in] ht
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//* integer height of the array
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//*
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//* @param[in] wd
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//* integer width of the array
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//*
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//* @returns
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//* None
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//*
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//* @remarks
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//* (ht,wd) can be (4,4), (4,8), (8,4), (8,8), (8,16), (16,8) or (16,16).
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//*
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//*******************************************************************************
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//*/
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//void ih264_default_weighted_pred_luma_av8(UWORD8 *puc_src1,
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// UWORD8 *puc_src2,
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// UWORD8 *puc_dst,
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// WORD32 src_strd1,
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// WORD32 src_strd2,
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// WORD32 dst_strd,
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// WORD32 ht,
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// WORD32 wd)
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//
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//**************Variables Vs Registers*****************************************
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// x0 => puc_src1
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// x1 => puc_src2
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// x2 => puc_dst
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// w3 => src_strd1
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// w4 => src_strd2
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// w5 => dst_strd
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// w6 => ht
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// w7 => wd
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//
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.text
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.p2align 2
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.include "ih264_neon_macros.s"
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.global ih264_default_weighted_pred_luma_av8
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ih264_default_weighted_pred_luma_av8:
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push_v_regs
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stp x19, x20, [sp, #-16]!
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sxtw x3, w3
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sxtw x4, w4
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sxtw x5, w5
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cmp w7, #16
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beq loop_16 //branch if wd is 16
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cmp w7, #8
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beq loop_8 //branch if wd is 8
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loop_4: //each iteration processes four rows
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ld1 {v0.s}[0], [x0], x3 //load row 1 in source 1
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ld1 {v0.s}[1], [x0], x3 //load row 2 in source 1
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ld1 {v2.s}[0], [x1], x4 //load row 1 in source 2
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ld1 {v2.s}[1], [x1], x4 //load row 2 in source 2
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ld1 {v1.s}[0], [x0], x3 //load row 3 in source 1
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ld1 {v1.s}[1], [x0], x3 //load row 4 in source 1
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urhadd v0.8b, v0.8b , v2.8b
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ld1 {v3.s}[0], [x1], x4 //load row 3 in source 2
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ld1 {v3.s}[1], [x1], x4 //load row 4 in source 2
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subs w6, w6, #4 //decrement ht by 4
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st1 {v0.s}[0], [x2], x5 //load row 1 in destination
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st1 {v0.s}[1], [x2], x5 //load row 2 in destination
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urhadd v1.8b, v1.8b , v3.8b
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st1 {v1.s}[0], [x2], x5 //load row 3 in destination
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st1 {v1.s}[1], [x2], x5 //load row 4 in destination
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bgt loop_4 //if greater than 0 repeat the loop again
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b end_loops
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loop_8: //each iteration processes four rows
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ld1 {v0.8b}, [x0], x3 //load row 1 in source 1
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ld1 {v4.8b}, [x1], x4 //load row 1 in source 2
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ld1 {v1.8b}, [x0], x3 //load row 2 in source 1
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ld1 {v5.8b}, [x1], x4 //load row 2 in source 2
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ld1 {v2.8b}, [x0], x3 //load row 3 in source 1
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urhadd v0.16b, v0.16b , v4.16b
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urhadd v1.16b, v1.16b , v5.16b
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ld1 {v6.8b}, [x1], x4 //load row 3 in source 2
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ld1 {v3.8b}, [x0], x3 //load row 4 in source 1
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urhadd v2.8b, v2.8b , v6.8b
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ld1 {v7.8b}, [x1], x4 //load row 4 in source 2
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subs w6, w6, #4 //decrement ht by 4
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st1 {v0.8b}, [x2], x5 //load row 1 in destination
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urhadd v3.8b, v3.8b , v7.8b
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st1 {v1.8b}, [x2], x5 //load row 2 in destination
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st1 {v2.8b}, [x2], x5 //load row 3 in destination
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st1 {v3.8b}, [x2], x5 //load row 4 in destination
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bgt loop_8 //if greater than 0 repeat the loop again
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b end_loops
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loop_16: //each iteration processes eight rows
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ld1 {v0.8b, v1.8b}, [x0], x3 //load row 1 in source 1
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ld1 {v16.8b, v17.8b}, [x1], x4 //load row 1 in source 2
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ld1 {v2.8b, v3.8b}, [x0], x3 //load row 2 in source 1
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ld1 {v18.8b, v19.8b}, [x1], x4 //load row 2 in source 2
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urhadd v0.16b, v0.16b , v16.16b
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urhadd v1.16b, v1.16b , v17.16b
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ld1 {v4.8b, v5.8b}, [x0], x3 //load row 3 in source 1
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ld1 {v20.8b, v21.8b}, [x1], x4 //load row 3 in source 2
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urhadd v2.16b, v2.16b , v18.16b
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urhadd v3.16b, v3.16b , v19.16b
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ld1 {v6.8b, v7.8b}, [x0], x3 //load row 4 in source 1
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ld1 {v22.8b, v23.8b}, [x1], x4 //load row 4 in source 2
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urhadd v4.16b, v4.16b , v20.16b
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urhadd v5.16b, v5.16b , v21.16b
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ld1 {v8.8b, v9.8b}, [x0], x3 //load row 5 in source 1
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ld1 {v24.8b, v25.8b}, [x1], x4 //load row 5 in source 2
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urhadd v6.16b, v6.16b , v22.16b
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urhadd v7.16b, v7.16b , v23.16b
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ld1 {v10.8b, v11.8b}, [x0], x3 //load row 6 in source 1
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ld1 {v26.8b, v27.8b}, [x1], x4 //load row 6 in source 2
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urhadd v8.16b, v8.16b , v24.16b
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urhadd v9.16b, v9.16b , v25.16b
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ld1 {v12.8b, v13.8b}, [x0], x3 //load row 7 in source 1
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ld1 {v28.8b, v29.8b}, [x1], x4 //load row 7 in source 2
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urhadd v10.16b, v10.16b , v26.16b
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urhadd v11.16b, v11.16b , v27.16b
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ld1 {v14.8b, v15.8b}, [x0], x3 //load row 8 in source 1
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ld1 {v30.8b, v31.8b}, [x1], x4 //load row 8 in source 2
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urhadd v12.16b, v12.16b , v28.16b
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urhadd v13.16b, v13.16b , v29.16b
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st1 {v0.8b, v1.8b}, [x2], x5 //load row 1 in destination
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st1 {v2.8b, v3.8b}, [x2], x5 //load row 2 in destination
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urhadd v14.16b, v14.16b , v30.16b
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urhadd v15.16b, v15.16b , v31.16b
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st1 {v4.8b, v5.8b}, [x2], x5 //load row 3 in destination
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st1 {v6.8b, v7.8b}, [x2], x5 //load row 4 in destination
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subs w6, w6, #8 //decrement ht by 8
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st1 {v8.8b, v9.8b}, [x2], x5 //load row 5 in destination
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st1 {v10.8b, v11.8b}, [x2], x5 //load row 6 in destination
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st1 {v12.8b, v13.8b}, [x2], x5 //load row 7 in destination
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st1 {v14.8b, v15.8b}, [x2], x5 //load row 8 in destination
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bgt loop_16 //if greater than 0 repeat the loop again
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end_loops:
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// LDMFD sp!,{x4-x7,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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//*******************************************************************************
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//* @function
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//* ih264_default_weighted_pred_chroma_av8()
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//*
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//* @brief
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//* This routine performs the default weighted prediction as described in sec
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//* 8.4.2.3.1 titled "Default weighted sample prediction process" for chroma.
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//*
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//* @par Description:
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//* This function gets two ht x wd blocks, calculates their rounded-average and
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//* stores it in the destination block for U and V.
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//*
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//* @param[in] puc_src1:
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//* UWORD8 Pointer to the buffer containing the first input block.
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//*
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//* @param[in] puc_src2:
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//* UWORD8 Pointer to the buffer containing the second input block.
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//*
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//* @param[out] puc_dst
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//* UWORD8 pointer to the destination where the output block is stored.
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//*
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//* @param[in] src_strd1
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//* Stride of the first input buffer
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//*
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//* @param[in] src_strd2
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//* Stride of the second input buffer
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//*
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//* @param[in] dst_strd
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//* Stride of the destination buffer
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//*
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//* @param[in] ht
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//* integer height of the array
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//*
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//* @param[in] wd
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//* integer width of the array
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//*
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//* @returns
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//* None
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//*
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//* @remarks
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//* (ht,wd) can be (2,2), (2,4), (4,2), (4,4), (4,8), (8,4) or (8,8).
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//*
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//*******************************************************************************
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//*/
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//void ih264_default_weighted_pred_chroma_av8(UWORD8 *puc_src1,
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// UWORD8 *puc_src2,
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// UWORD8 *puc_dst,
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// WORD32 src_strd1,
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// WORD32 src_strd2,
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// WORD32 dst_strd,
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// WORD32 ht,
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// WORD32 wd)
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//
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//**************Variables Vs Registers*****************************************
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// x0 => puc_src1
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// x1 => puc_src2
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// x2 => puc_dst
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// w3 => src_strd1
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// w4 => src_strd2
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// w5 => dst_strd
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// w6 => ht
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// w7 => wd
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//
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.global ih264_default_weighted_pred_chroma_av8
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ih264_default_weighted_pred_chroma_av8:
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push_v_regs
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stp x19, x20, [sp, #-16]!
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sxtw x3, w3
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sxtw x4, w4
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sxtw x5, w5
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cmp w7, #8
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beq loop_8_uv //branch if wd is 8
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cmp w7, #4
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beq loop_4_uv //branch if wd is 4
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loop_2_uv: //each iteration processes two rows
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ld1 {v0.s}[0], [x0], x3 //load row 1 in source 1
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ld1 {v0.s}[1], [x0], x3 //load row 2 in source 1
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ld1 {v1.s}[0], [x1], x4 //load row 1 in source 2
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ld1 {v1.s}[1], [x1], x4 //load row 2 in source 2
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urhadd v0.8b, v0.8b , v1.8b
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subs w6, w6, #2 //decrement ht by 2
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st1 {v0.s}[0], [x2], x5 //load row 1 in destination
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st1 {v0.s}[1], [x2], x5 //load row 2 in destination
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bgt loop_2_uv //if greater than 0 repeat the loop again
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b end_loops_uv
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loop_4_uv: //each iteration processes two rows
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ld1 {v0.8b}, [x0], x3 //load row 1 in source 1
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ld1 {v2.8b}, [x1], x4 //load row 1 in source 2
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ld1 {v1.8b}, [x0], x3 //load row 2 in source 1
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urhadd v0.8b, v0.8b , v2.8b
|
||
|
|
ld1 {v3.8b}, [x1], x4 //load row 2 in source 2
|
||
|
|
urhadd v1.8b, v1.8b , v3.8b
|
||
|
|
st1 {v0.8b}, [x2], x5 //load row 1 in destination
|
||
|
|
subs w6, w6, #2 //decrement ht by 2
|
||
|
|
st1 {v1.8b}, [x2], x5 //load row 2 in destination
|
||
|
|
bgt loop_4_uv //if greater than 0 repeat the loop again
|
||
|
|
b end_loops_uv
|
||
|
|
|
||
|
|
loop_8_uv: //each iteration processes four rows
|
||
|
|
|
||
|
|
ld1 {v0.8b, v1.8b}, [x0], x3 //load row 1 in source 1
|
||
|
|
ld1 {v8.8b, v9.8b}, [x1], x4 //load row 1 in source 2
|
||
|
|
ld1 {v2.8b, v3.8b}, [x0], x3 //load row 2 in source 1
|
||
|
|
urhadd v0.16b, v0.16b , v8.16b
|
||
|
|
urhadd v1.16b, v1.16b , v9.16b
|
||
|
|
ld1 {v10.8b, v11.8b}, [x1], x4 //load row 2 in source 2
|
||
|
|
ld1 {v4.8b, v5.8b}, [x0], x3 //load row 3 in source 1
|
||
|
|
urhadd v2.16b, v2.16b , v10.16b
|
||
|
|
urhadd v3.16b, v3.16b , v11.16b
|
||
|
|
ld1 {v12.8b, v13.8b}, [x1], x4 //load row 3 in source 2
|
||
|
|
ld1 {v6.8b, v7.8b}, [x0], x3 //load row 4 in source 1
|
||
|
|
urhadd v4.16b, v4.16b , v12.16b
|
||
|
|
urhadd v5.16b, v5.16b , v13.16b
|
||
|
|
ld1 {v14.8b, v15.8b}, [x1], x4 //load row 4 in source 2
|
||
|
|
st1 {v0.8b, v1.8b}, [x2], x5 //load row 1 in destination
|
||
|
|
urhadd v6.16b, v6.16b , v14.16b
|
||
|
|
urhadd v7.16b, v7.16b , v15.16b
|
||
|
|
st1 {v2.8b, v3.8b}, [x2], x5 //load row 2 in destination
|
||
|
|
subs w6, w6, #4 //decrement ht by 4
|
||
|
|
st1 {v4.8b, v5.8b}, [x2], x5 //load row 3 in destination
|
||
|
|
st1 {v6.8b, v7.8b}, [x2], x5 //load row 4 in destination
|
||
|
|
bgt loop_8_uv //if greater than 0 repeat the loop again
|
||
|
|
|
||
|
|
end_loops_uv:
|
||
|
|
ldp x19, x20, [sp], #16
|
||
|
|
pop_v_regs
|
||
|
|
ret
|
||
|
|
|
||
|
|
|
||
|
|
|