//******************************************************************************
//*
//* Copyright (C) 2015 The Android Open Source Project
//*
//* 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.
//*
//*****************************************************************************
//* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
//*/
///**
// *******************************************************************************
// * @file
// * ih264_iquant_itrans_recon_dc_av8.s
// *
// * @brief
// * Contains function definitions for single stage inverse transform
// *
// * @author
// * Mohit
// *
// * @par List of Functions:
// * - ih264_iquant_itrans_recon_4x4_dc_av8()
// * - ih264_iquant_itrans_recon_8x8_dc_av8()
// * - ih264_iquant_itrans_recon_chroma_4x4_dc_av8()
// *
// * @remarks
// * None
// *
// *******************************************************************************
//*/
.include "ih264_neon_macros.s"
///**
// *******************************************************************************
// *
// * @brief
// * This function performs inverse quant and Inverse transform type Ci4 for 4*4 block
// * for dc input pattern only, i.e. only the (0,0) element of the input 4x4 block is
// * non-zero. For complete function, refer ih264_iquant_itrans_recon_a9.s
// *
// * @par Description:
// * Performs inverse transform Ci4 and adds the residue to get the
// * reconstructed block
// *
// * @param[in] pi2_src
// * Input 4x4 coefficients
// *
// * @param[in] pu1_pred
// * Prediction 4x4 block
// *
// * @param[out] pu1_out
// * Output 4x4 block
// *
// * @param[in] u4_qp_div_6
// * QP
// *
// * @param[in] pu2_weigh_mat
// * Pointer to weight matrix
// *
// * @param[in] pred_strd,
// * Prediction stride
// *
// * @param[in] out_strd
// * Output Stride
// *
// *@param[in] pi2_tmp
// * temporary buffer of size 1*16
// *
// * @param[in] pu2_iscal_mat
// * Pointer to the inverse quantization matrix
// *
// * @returns Void
// *
// * @remarks
// * None
// *
// *******************************************************************************
// */
//void ih264_iquant_itrans_recon_4x4_dc(WORD16 *pi2_src,
// UWORD8 *pu1_pred,
// UWORD8 *pu1_out,
// WORD32 pred_strd,
// WORD32 out_strd,
// const UWORD16 *pu2_iscal_mat,
// const UWORD16 *pu2_weigh_mat,
// UWORD32 u4_qp_div_6,
// WORD32 *pi4_tmp,
// WORD32 iq_start_idx
// WORD16 *pi2_dc_ld_addr)
//**************Variables Vs Registers*****************************************
//x0 => *pi2_src
//x1 => *pu1_pred
//x2 => *pu1_out
//w3 => pred_strd
//w4 => out_strd
//x5 => *pu2_iscal_mat
//x6 => *pu2_weigh_mat
//w7 => u4_qp_div_6
// => pi4_tmp
// => iq_start_idx
// => pi2_dc_ld_addr
.text
.p2align 2
.global ih264_iquant_itrans_recon_4x4_dc_av8
ih264_iquant_itrans_recon_4x4_dc_av8:
sxtw x3, w3
sxtw x4, w4
ldr w8, [sp, #8] //Loads iq_start_idx
subs w8, w8, #1 // if x8 == 1 => intra case , so result of subtraction is zero and z flag is set
ldr x10, [sp, #16] //Load alternate dc address
push_v_regs
dup v30.4s, w7 //Populate the u4_qp_div_6 in Q15
bne donot_use_pi2_dc_ld_addr_luma_dc
ld1 {v0.h}[0], [x10]
donot_use_pi2_dc_ld_addr_luma_dc:
beq donot_use_pi2_src_luma_dc
ld1 {v0.h}[0], [x5]
ld1 {v1.h}[0], [x6]
ld1 {v2.h}[0], [x0]
mul v0.4h, v1.4h, v0.4h
smull v0.4s, v0.4h, v2.4h
sshl v0.4s, v0.4s, v30.4s
sqrshrn v0.4h, v0.4s, #4
donot_use_pi2_src_luma_dc:
dup v0.8h, v0.h[0]
srshr v0.8h, v0.8h, #6
ld1 {v1.s}[0], [x1], x3
ld1 {v1.s}[1], [x1], x3
ld1 {v2.s}[0], [x1], x3
ld1 {v2.s}[1], [x1]
uxtl v1.8h, v1.8b
uxtl v2.8h, v2.8b
add v1.8h, v0.8h, v1.8h
add v2.8h, v0.8h, v2.8h
sqxtun v1.8b, v1.8h
sqxtun v2.8b, v2.8h
st1 {v1.s}[0], [x2], x4
st1 {v1.s}[1], [x2], x4
st1 {v2.s}[0], [x2], x4
st1 {v2.s}[1], [x2]
pop_v_regs
ret
// /*
// ********************************************************************************
// *
// * @brief This function reconstructs a 4x4 sub block from quantized resiude and
// * prediction buffer if only dc value is present for residue
// *
// * @par Description:
// * The quantized residue is first inverse quantized,
// * This inverse quantized content is added to the prediction buffer to recon-
// * struct the end output
// *
// * @param[in] pi2_src
// * quantized dc coeffiient
// *
// * @param[in] pu1_pred
// * prediction 4x4 block in interleaved format
// *
// * @param[in] pred_strd,
// * Prediction buffer stride in interleaved format
// *
// * @param[in] out_strd
// * recon buffer Stride
// *
// * @returns none
// *
// * @remarks none
// *
// *******************************************************************************
// */
// void ih264_iquant_itrans_recon_chroma_4x4_dc(WORD16 *pi2_src,
// UWORD8 *pu1_pred,
// UWORD8 *pu1_out,
// WORD32 pred_strd,
// WORD32 out_strd,
// const UWORD16 *pu2_iscal_mat,
// const UWORD16 *pu2_weigh_mat,
// UWORD32 u4_qp_div_6,
// WORD16 *pi2_tmp,
// WORD16 *pi2_dc_src)
// Register Usage
// x0 : pi2_src
// x1 : pu1_pred
// x2 : pu1_out
// w3 : pred_strd
// w4 : out_strd
// x5 : pu2_iscal_mat
// x6 : pu2_weigh_mat
// w7 : u4_qp_div_6
// : pi2_tmp
// : pi2_dc_src
// Neon registers d0-d7, d16-d30 are used
// No need for pushing arm and neon registers
.global ih264_iquant_itrans_recon_chroma_4x4_dc_av8
ih264_iquant_itrans_recon_chroma_4x4_dc_av8:
sxtw x3, w3
sxtw x4, w4
ldr x0, [sp, #8]
push_v_regs
ld1 {v0.h}[0], [x0]
dup v0.8h, v0.h[0]
srshr v0.8h, v0.8h, #6
//backup pu1_out
mov x0, x2
//nop v3.16b //dummy for deinterleaving
movi v31.8h, #0x00ff //mask for interleaving [copy lower 8 bits]
ld1 {v1.d}[0], [x1], x3
ld1 {v1.d}[1], [x1], x3
ld1 {v2.d}[0], [x1], x3
ld1 {v2.d}[1], [x1], x3
ld1 {v11.d}[0], [x2], x4 //load pu1_out for interleaving
ld1 {v11.d}[1], [x2], x4
ld1 {v12.d}[0], [x2], x4
ld1 {v12.d}[1], [x2]
uzp1 v1.16b, v1.16b, v3.16b
uzp1 v2.16b, v2.16b, v3.16b
uaddw v1.8h, v0.8h, v1.8b
uaddw v2.8h, v0.8h, v2.8b
sqxtun v1.8b, v1.8h
sqxtun v2.8b, v2.8h
uxtl v1.8h, v1.8b
uxtl v2.8h, v2.8b
bit v11.16b, v1.16b, v31.16b
bit v12.16b, v2.16b, v31.16b
st1 {v11.d}[0], [x0], x4
st1 {v11.d}[1], [x0], x4
st1 {v12.d}[0], [x0], x4
st1 {v12.d}[1], [x0]
pop_v_regs
ret
///*
// *******************************************************************************
// *
// * //brief
// * This function performs inverse quant and Inverse transform type Ci4 for 8*8 block
// * [Only for Dc coeff]
// * //par Description:
// * Performs inverse transform Ci8 and adds the residue to get the
// * reconstructed block
// *
// * //param[in] pi2_src
// * Input 4x4 coefficients
// *
// * //param[in] pu1_pred
// * Prediction 4x4 block
// *
// * //param[out] pu1_out
// * Output 4x4 block
// *
// * //param[in] u4_qp_div_6
// * QP
// *
// * //param[in] pu2_weigh_mat
// * Pointer to weight matrix
// *
// * //param[in] pred_strd,
// * Prediction stride
// *
// * //param[in] out_strd
// * Output Stride
// *
// *//param[in] pi2_tmp
// * temporary buffer of size 1*64
// *
// * //param[in] pu2_iscal_mat
// * Pointer to the inverse quantization matrix
// *
// * //returns Void
// *
// * //remarks
// * None
// *
// *******************************************************************************
// */
//void ih264_iquant_itrans_recon_dc_8x8(WORD16 *pi2_src,
// UWORD8 *pu1_pred,
// UWORD8 *pu1_out,
// WORD32 pred_strd,
// WORD32 out_strd,
// const UWORD16 *pu2_iscal_mat,
// const UWORD16 *pu2_weigh_mat,
// UWORD32 u4_qp_div_6,
// WORD32 *pi4_tmp,
// WORD32 iq_start_idx
// WORD16 *pi2_dc_ld_addr)
//**************Variables Vs Registers*****************************************
//x0 => *pi2_src
//x1 => *pu1_pred
//x2 => *pu1_out
//w3 => pred_strd
//w4 => out_strd
//x5 => *pu2_iscal_mat
//x6 => *pu2_weigh_mat
//w7 => u4_qp_div_6
//NOT USED => pi4_tmp
//NOT USED => iq_start_idx
//NOT USED => pi2_dc_ld_addr
.global ih264_iquant_itrans_recon_8x8_dc_av8
ih264_iquant_itrans_recon_8x8_dc_av8:
push_v_regs
sxtw x3, w3
sxtw x4, w4
ld1 {v1.h}[0], [x5]
ld1 {v2.h}[0], [x6]
ld1 {v0.h}[0], [x0]
dup v3.4s, w7
mul v1.8h, v1.8h, v2.8h
smull v0.4s, v0.4h, v1.4h
sshl v0.4s, v0.4s, v3.4s
sqrshrn v0.4h, v0.4s, #6
srshr v0.8h, v0.8h, #6
dup v0.8h, v0.h[0]
ld1 {v22.8b}, [x1], x3
ld1 {v23.8b}, [x1], x3
ld1 {v24.8b}, [x1], x3
ld1 {v25.8b}, [x1], x3
ld1 {v26.8b}, [x1], x3
ld1 {v27.8b}, [x1], x3
ld1 {v28.8b}, [x1], x3
ld1 {v29.8b}, [x1]
uaddw v1.8h, v0.8h, v22.8b
uaddw v2.8h, v0.8h, v23.8b
uaddw v3.8h, v0.8h, v24.8b
uaddw v8.8h, v0.8h, v25.8b
uaddw v9.8h, v0.8h, v26.8b
uaddw v10.8h, v0.8h, v27.8b
uaddw v11.8h, v0.8h, v28.8b
uaddw v12.8h, v0.8h, v29.8b
sqxtun v1.8b, v1.8h
sqxtun v2.8b, v2.8h
sqxtun v3.8b, v3.8h
sqxtun v8.8b, v8.8h
sqxtun v9.8b, v9.8h
sqxtun v10.8b, v10.8h
sqxtun v11.8b, v11.8h
sqxtun v12.8b, v12.8h
st1 {v1.8b}, [x2], x4
st1 {v2.8b}, [x2], x4
st1 {v3.8b}, [x2], x4
st1 {v8.8b}, [x2], x4
st1 {v9.8b}, [x2], x4
st1 {v10.8b}, [x2], x4
st1 {v11.8b}, [x2], x4
st1 {v12.8b}, [x2]
pop_v_regs
ret