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473 lines
20 KiB
473 lines
20 KiB
//******************************************************************************
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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_weighted_pred_av8.s
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//*
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//* @brief
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//* Contains function definitions for 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_weighted_pred_luma_av8()
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//* - ih264_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_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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//* 8.4.2.3.2 titled "Weighted sample prediction process" for luma.
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//*
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//* @par Description:
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//* This function gets a ht x wd block, calculates the weighted sample, rounds
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//* off, adds offset and stores it in the destination block.
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//*
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//* @param[in] puc_src:
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//* UWORD8 Pointer to the buffer containing the 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_strd
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//* Stride of the 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] log_WD
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//* number of bits to be rounded off
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//*
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//* @param[in] wt
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//* weight for the weighted prediction
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//*
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//* @param[in] ofst
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//* offset used after rounding off
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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_weighted_pred_luma_av8(UWORD8 *puc_src,
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// UWORD8 *puc_dst,
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// WORD32 src_strd,
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// WORD32 dst_strd,
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// WORD32 log_WD,
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// WORD32 wt,
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// WORD32 ofst,
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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_src
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// x1 => puc_dst
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// w2 => src_strd
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// w3 => dst_strd
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// w4 => log_WD
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// w5 => wt
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// w6 => ofst
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// w7 => ht
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// [sp] => wd (w8)
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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_weighted_pred_luma_av8
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ih264_weighted_pred_luma_av8:
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// STMFD sp!, {x4-x9,x14} //stack stores the values of the arguments
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push_v_regs
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sxtw x2, w2
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sxtw x3, w3
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stp x19, x20, [sp, #-16]!
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ldr w8, [sp, #80] //Load wd
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sxtw x8, w8
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dup v2.4h, w5 //D2 = wt (16-bit)
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neg w9, w4 //w9 = -log_WD
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dup v3.8b, w6 //D3 = ofst (8-bit)
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cmp w8, #16 //check if wd is 16
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dup v0.8h, w9 //Q0 = -log_WD (16-bit)
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beq loop_16 //branch if wd is 16
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cmp w8, #8 //check if wd is 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 {v4.s}[0], [x0], x2 //load row 1 in source
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ld1 {v4.s}[1], [x0], x2 //load row 2 in source
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ld1 {v6.s}[0], [x0], x2 //load row 3 in source
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ld1 {v6.s}[1], [x0], x2 //load row 4 in source
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uxtl v4.8h, v4.8b //converting rows 1,2 to 16-bit
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uxtl v6.8h, v6.8b //converting rows 3,4 to 16-bit
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mul v4.8h, v4.8h , v2.h[0] //weight mult. for rows 1,2
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mul v6.8h, v6.8h , v2.h[0] //weight mult. for rows 3,4
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subs w7, w7, #4 //decrement ht by 4
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srshl v4.8h, v4.8h , v0.8h //rounds off the weighted samples from rows 1,2
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srshl v6.8h, v6.8h , v0.8h //rounds off the weighted samples from rows 3,4
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saddw v4.8h, v4.8h , v3.8b //adding offset for rows 1,2
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saddw v6.8h, v6.8h , v3.8b //adding offset for rows 3,4
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sqxtun v4.8b, v4.8h //saturating rows 1,2 to unsigned 8-bit
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sqxtun v6.8b, v6.8h //saturating rows 3,4 to unsigned 8-bit
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st1 {v4.s}[0], [x1], x3 //store row 1 in destination
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st1 {v4.s}[1], [x1], x3 //store row 2 in destination
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st1 {v6.s}[0], [x1], x3 //store row 3 in destination
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st1 {v6.s}[1], [x1], x3 //store 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 {v4.8b}, [x0], x2 //load row 1 in source
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ld1 {v6.8b}, [x0], x2 //load row 2 in source
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ld1 {v8.8b}, [x0], x2 //load row 3 in source
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uxtl v4.8h, v4.8b //converting row 1 to 16-bit
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ld1 {v10.8b}, [x0], x2 //load row 4 in source
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uxtl v6.8h, v6.8b //converting row 2 to 16-bit
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uxtl v8.8h, v8.8b //converting row 3 to 16-bit
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mul v4.8h, v4.8h , v2.h[0] //weight mult. for row 1
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uxtl v10.8h, v10.8b //converting row 4 to 16-bit
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mul v6.8h, v6.8h , v2.h[0] //weight mult. for row 2
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mul v8.8h, v8.8h , v2.h[0] //weight mult. for row 3
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mul v10.8h, v10.8h , v2.h[0] //weight mult. for row 4
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srshl v4.8h, v4.8h , v0.8h //rounds off the weighted samples from row 1
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srshl v6.8h, v6.8h , v0.8h //rounds off the weighted samples from row 2
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srshl v8.8h, v8.8h , v0.8h //rounds off the weighted samples from row 3
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saddw v4.8h, v4.8h , v3.8b //adding offset for row 1
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srshl v10.8h, v10.8h , v0.8h //rounds off the weighted samples from row 4
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saddw v6.8h, v6.8h , v3.8b //adding offset for row 2
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saddw v8.8h, v8.8h , v3.8b //adding offset for row 3
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sqxtun v4.8b, v4.8h //saturating row 1 to unsigned 8-bit
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saddw v10.8h, v10.8h , v3.8b //adding offset for row 4
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sqxtun v6.8b, v6.8h //saturating row 2 to unsigned 8-bit
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sqxtun v8.8b, v8.8h //saturating row 3 to unsigned 8-bit
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sqxtun v10.8b, v10.8h //saturating row 4 to unsigned 8-bit
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st1 {v4.8b}, [x1], x3 //store row 1 in destination
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st1 {v6.8b}, [x1], x3 //store row 2 in destination
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subs w7, w7, #4 //decrement ht by 4
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st1 {v8.8b}, [x1], x3 //store row 3 in destination
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st1 {v10.8b}, [x1], x3 //store 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 two rows
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ld1 {v4.8b, v5.8b}, [x0], x2 //load row 1 in source
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ld1 {v6.8b, v7.8b}, [x0], x2 //load row 2 in source
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uxtl v12.8h, v4.8b //converting row 1L to 16-bit
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ld1 {v8.8b, v9.8b}, [x0], x2 //load row 3 in source
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uxtl v14.8h, v5.8b //converting row 1H to 16-bit
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ld1 {v10.8b, v11.8b}, [x0], x2 //load row 4 in source
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uxtl v16.8h, v6.8b //converting row 2L to 16-bit
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mul v12.8h, v12.8h , v2.h[0] //weight mult. for row 1L
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uxtl v18.8h, v7.8b //converting row 2H to 16-bit
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mul v14.8h, v14.8h , v2.h[0] //weight mult. for row 1H
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uxtl v20.8h, v8.8b //converting row 3L to 16-bit
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mul v16.8h, v16.8h , v2.h[0] //weight mult. for row 2L
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uxtl v22.8h, v9.8b //converting row 3H to 16-bit
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mul v18.8h, v18.8h , v2.h[0] //weight mult. for row 2H
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uxtl v24.8h, v10.8b //converting row 4L to 16-bit
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mul v20.8h, v20.8h , v2.h[0] //weight mult. for row 3L
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uxtl v26.8h, v11.8b //converting row 4H to 16-bit
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mul v22.8h, v22.8h , v2.h[0] //weight mult. for row 3H
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mul v24.8h, v24.8h , v2.h[0] //weight mult. for row 4L
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srshl v12.8h, v12.8h , v0.8h //rounds off the weighted samples from row 1L
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mul v26.8h, v26.8h , v2.h[0] //weight mult. for row 4H
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srshl v14.8h, v14.8h , v0.8h //rounds off the weighted samples from row 1H
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srshl v16.8h, v16.8h , v0.8h //rounds off the weighted samples from row 2L
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saddw v12.8h, v12.8h , v3.8b //adding offset for row 1L
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srshl v18.8h, v18.8h , v0.8h //rounds off the weighted samples from row 2H
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saddw v14.8h, v14.8h , v3.8b //adding offset for row 1H
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sqxtun v4.8b, v12.8h //saturating row 1L to unsigned 8-bit
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srshl v20.8h, v20.8h , v0.8h //rounds off the weighted samples from row 3L
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saddw v16.8h, v16.8h , v3.8b //adding offset for row 2L
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sqxtun v5.8b, v14.8h //saturating row 1H to unsigned 8-bit
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srshl v22.8h, v22.8h , v0.8h //rounds off the weighted samples from row 3H
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saddw v18.8h, v18.8h , v3.8b //adding offset for row 2H
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sqxtun v6.8b, v16.8h //saturating row 2L to unsigned 8-bit
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srshl v24.8h, v24.8h , v0.8h //rounds off the weighted samples from row 4L
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saddw v20.8h, v20.8h , v3.8b //adding offset for row 3L
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sqxtun v7.8b, v18.8h //saturating row 2H to unsigned 8-bit
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srshl v26.8h, v26.8h , v0.8h //rounds off the weighted samples from row 4H
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saddw v22.8h, v22.8h , v3.8b //adding offset for row 3H
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sqxtun v8.8b, v20.8h //saturating row 3L to unsigned 8-bit
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saddw v24.8h, v24.8h , v3.8b //adding offset for row 4L
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sqxtun v9.8b, v22.8h //saturating row 3H to unsigned 8-bit
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saddw v26.8h, v26.8h , v3.8b //adding offset for row 4H
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sqxtun v10.8b, v24.8h //saturating row 4L to unsigned 8-bit
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st1 {v4.8b, v5.8b}, [x1], x3 //store row 1 in destination
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sqxtun v11.8b, v26.8h //saturating row 4H to unsigned 8-bit
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st1 {v6.8b, v7.8b}, [x1], x3 //store row 2 in destination
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subs w7, w7, #4 //decrement ht by 4
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st1 {v8.8b, v9.8b}, [x1], x3 //store row 3 in destination
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st1 {v10.8b, v11.8b}, [x1], x3 //store row 4 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-x9,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_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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//* 8.4.2.3.2 titled "Weighted sample prediction process" for chroma.
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//*
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//* @par Description:
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//* This function gets a ht x wd block, calculates the weighted sample, rounds
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//* off, adds offset and stores it in the destination block for U and V.
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//*
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//* @param[in] puc_src:
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//* UWORD8 Pointer to the buffer containing the 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_strd
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//* Stride of the 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] log_WD
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//* number of bits to be rounded off
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//*
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//* @param[in] wt
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//* weights for the weighted prediction for U and V
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//*
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//* @param[in] ofst
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//* offsets used after rounding off for U and V
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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_weighted_pred_chroma_av8(UWORD8 *puc_src,
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// UWORD8 *puc_dst,
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// WORD32 src_strd,
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// WORD32 dst_strd,
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// WORD32 log_WD,
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// WORD32 wt,
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// WORD32 ofst,
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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_src
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// x1 => puc_dst
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// w2 => src_strd
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// w3 => dst_strd
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// w4 => log_WD
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// w5 => wt
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// w6 => ofst
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// w7 => ht
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// [sp] => wd (w8)
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//
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.global ih264_weighted_pred_chroma_av8
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ih264_weighted_pred_chroma_av8:
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// STMFD sp!, {x4-x9,x14} //stack stores the values of the arguments
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push_v_regs
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sxtw x2, w2
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sxtw x3, w3
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stp x19, x20, [sp, #-16]!
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ldr w8, [sp, #80] //Load wd
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sxtw x8, w8
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neg w9, w4 //w9 = -log_WD
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dup v2.4s, w5 //Q1 = {wt_u (16-bit), wt_v (16-bit)}
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dup v4.4h, w6 //D4 = {ofst_u (8-bit), ofst_v (8-bit)}
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cmp w8, #8 //check if wd is 8
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dup v0.8h, w9 //Q0 = -log_WD (16-bit)
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beq loop_8_uv //branch if wd is 8
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cmp w8, #4 //check if ws is 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 {v6.s}[0], [x0], x2 //load row 1 in source
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ld1 {v6.s}[1], [x0], x2 //load row 2 in source
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uxtl v6.8h, v6.8b //converting rows 1,2 to 16-bit
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mul v6.8h, v6.8h , v2.8h //weight mult. for rows 1,2
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srshl v6.8h, v6.8h , v0.8h //rounds off the weighted samples from rows 1,2
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saddw v6.8h, v6.8h , v4.8b //adding offset for rows 1,2
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sqxtun v6.8b, v6.8h //saturating rows 1,2 to unsigned 8-bit
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subs w7, w7, #2 //decrement ht by 2
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st1 {v6.s}[0], [x1], x3 //store row 1 in destination
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st1 {v6.s}[1], [x1], x3 //store 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 {v6.8b}, [x0], x2 //load row 1 in source
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ld1 {v8.8b}, [x0], x2 //load row 2 in source
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uxtl v6.8h, v6.8b //converting row 1 to 16-bit
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uxtl v8.8h, v8.8b //converting row 2 to 16-bit
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mul v6.8h, v6.8h , v2.8h //weight mult. for row 1
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mul v8.8h, v8.8h , v2.8h //weight mult. for row 2
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subs w7, w7, #2 //decrement ht by 2
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srshl v6.8h, v6.8h , v0.8h //rounds off the weighted samples from row 1
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srshl v8.8h, v8.8h , v0.8h //rounds off the weighted samples from row 2
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saddw v6.8h, v6.8h , v4.8b //adding offset for row 1
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saddw v8.8h, v8.8h , v4.8b //adding offset for row 2
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sqxtun v6.8b, v6.8h //saturating row 1 to unsigned 8-bit
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sqxtun v8.8b, v8.8h //saturating row 2 to unsigned 8-bit
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st1 {v6.8b}, [x1], x3 //store row 1 in destination
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st1 {v8.8b}, [x1], x3 //store row 2 in destination
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bgt loop_4_uv //if greater than 0 repeat the loop again
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b end_loops_uv
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loop_8_uv: //each iteration processes two rows
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ld1 {v6.8b, v7.8b}, [x0], x2 //load row 1 in source
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ld1 {v8.8b, v9.8b}, [x0], x2 //load row 2 in source
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uxtl v14.8h, v6.8b //converting row 1L to 16-bit
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ld1 {v10.8b, v11.8b}, [x0], x2 //load row 3 in source
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uxtl v16.8h, v7.8b //converting row 1H to 16-bit
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ld1 {v12.8b, v13.8b}, [x0], x2 //load row 4 in source
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mul v14.8h, v14.8h , v2.8h //weight mult. for row 1L
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uxtl v18.8h, v8.8b //converting row 2L to 16-bit
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mul v16.8h, v16.8h , v2.8h //weight mult. for row 1H
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uxtl v20.8h, v9.8b //converting row 2H to 16-bit
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mul v18.8h, v18.8h , v2.8h //weight mult. for row 2L
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uxtl v22.8h, v10.8b //converting row 3L to 16-bit
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mul v20.8h, v20.8h , v2.8h //weight mult. for row 2H
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uxtl v24.8h, v11.8b //converting row 3H to 16-bit
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mul v22.8h, v22.8h , v2.8h //weight mult. for row 3L
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uxtl v26.8h, v12.8b //converting row 4L to 16-bit
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mul v24.8h, v24.8h , v2.8h //weight mult. for row 3H
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uxtl v28.8h, v13.8b //converting row 4H to 16-bit
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mul v26.8h, v26.8h , v2.8h //weight mult. for row 4L
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srshl v14.8h, v14.8h , v0.8h //rounds off the weighted samples from row 1L
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mul v28.8h, v28.8h , v2.8h //weight mult. for row 4H
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srshl v16.8h, v16.8h , v0.8h //rounds off the weighted samples from row 1H
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srshl v18.8h, v18.8h , v0.8h //rounds off the weighted samples from row 2L
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saddw v14.8h, v14.8h , v4.8b //adding offset for row 1L
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srshl v20.8h, v20.8h , v0.8h //rounds off the weighted samples from row 2H
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saddw v16.8h, v16.8h , v4.8b //adding offset for row 1H
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sqxtun v6.8b, v14.8h //saturating row 1L to unsigned 8-bit
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srshl v22.8h, v22.8h , v0.8h //rounds off the weighted samples from row 3L
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saddw v18.8h, v18.8h , v4.8b //adding offset for row 2L
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sqxtun v7.8b, v16.8h //saturating row 1H to unsigned 8-bit
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srshl v24.8h, v24.8h , v0.8h //rounds off the weighted samples from row 3H
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saddw v20.8h, v20.8h , v4.8b //adding offset for row 2H
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sqxtun v8.8b, v18.8h //saturating row 2L to unsigned 8-bit
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srshl v26.8h, v26.8h , v0.8h //rounds off the weighted samples from row 4L
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saddw v22.8h, v22.8h , v4.8b //adding offset for row 3L
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sqxtun v9.8b, v20.8h //saturating row 2H to unsigned 8-bit
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srshl v28.8h, v28.8h , v0.8h //rounds off the weighted samples from row 4H
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saddw v24.8h, v24.8h , v4.8b //adding offset for row 3H
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sqxtun v10.8b, v22.8h //saturating row 3L to unsigned 8-bit
|
|
saddw v26.8h, v26.8h , v4.8b //adding offset for row 4L
|
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sqxtun v11.8b, v24.8h //saturating row 3H to unsigned 8-bit
|
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saddw v28.8h, v28.8h , v4.8b //adding offset for row 4H
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sqxtun v12.8b, v26.8h //saturating row 4L to unsigned 8-bit
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st1 {v6.8b, v7.8b}, [x1], x3 //store row 1 in destination
|
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sqxtun v13.8b, v28.8h //saturating row 4H to unsigned 8-bit
|
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st1 {v8.8b, v9.8b}, [x1], x3 //store row 2 in destination
|
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subs w7, w7, #4 //decrement ht by 4
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st1 {v10.8b, v11.8b}, [x1], x3 //store row 3 in destination
|
|
st1 {v12.8b, v13.8b}, [x1], x3 //store row 4 in destination
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|
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bgt loop_8_uv //if greater than 0 repeat the loop again
|
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end_loops_uv:
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// LDMFD sp!,{x4-x9,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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