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https://github.com/cemu-project/Cemu.git
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251 lines
8.9 KiB
ArmAsm
251 lines
8.9 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_ihadamard_scaling_a9.s
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@ *
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@ * @brief
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@ * Contains function definitions for inverse hadamard transform on 4x4 DC outputs
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@ * of 16x16 intra-prediction
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@ *
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@ * @author
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@ * Mohit
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@ *
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@ * @par List of Functions:
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@ * - ih264_ihadamard_scaling_4x4_a9()
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@ * - ih264_ihadamard_scaling_2x2_uv_a9()
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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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@ * @brief This function performs a 4x4 inverse hadamard transform on the 4x4 DC coefficients
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@ * of a 16x16 intra prediction macroblock, and then performs scaling.
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@ * prediction buffer
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@ *
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@ * @par Description:
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@ * The DC coefficients pass through a 2-stage inverse hadamard transform.
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@ * This inverse transformed content is scaled to based on Qp value.
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@ *
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@ * @param[in] pi2_src
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@ * input 4x4 block of DC coefficients
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@ *
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@ * @param[out] pi2_out
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@ * output 4x4 block
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@ *
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@ * @param[in] pu2_iscal_mat
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@ * pointer to scaling list
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@ *
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@ * @param[in] pu2_weigh_mat
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@ * pointer to weight matrix
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@ *
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@ * @param[in] u4_qp_div_6
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@ * Floor (qp/6)
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@ *
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@ * @param[in] pi4_tmp
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@ * temporary buffer of size 1*16
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@ *
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@ * @returns none
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@ *
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@ * @remarks none
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@ *
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@ *******************************************************************************
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@ *
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@ *
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@ *******************************************************************************
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@ *
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@ void ih264_ihadamard_scaling_4x4(WORD16* pi2_src,
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@ WORD16* pi2_out,
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@ const UWORD16 *pu2_iscal_mat,
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@ const UWORD16 *pu2_weigh_mat,
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@ UWORD32 u4_qp_div_6,
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@ WORD32* pi4_tmp)
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@**************Variables Vs Registers*****************************************
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@r0 => *pi2_src
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@r1 => *pi2_out
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@r2 => *pu2_iscal_mat
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@r3 => *pu2_weigh_mat
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@r4 => u4_qp_div_6
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.text
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.p2align 2
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.global ih264_ihadamard_scaling_4x4_a9
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ih264_ihadamard_scaling_4x4_a9:
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@VLD4.S16 is used because the pointer is incremented by SUB_BLK_WIDTH_4x4
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@If the macro value changes need to change the instruction according to it.
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@Only one shift is done in horizontal inverse because,
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@if u4_qp_div_6 is lesser than 4 then shift value will be neagative and do negative left shift, in this case rnd_factor has value
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@if u4_qp_div_6 is greater than 4 then shift value will be positive and do left shift, here rnd_factor is 0
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stmfd sp!, {r4-r12, r14} @ stack stores the values of the arguments
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ldr r4, [sp, #40] @ Loads u4_qp_div_6
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vdup.s32 q10, r4 @ Populate the u4_qp_div_6 in Q10
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ldrh r6, [r3] @ load pu2_weight_mat[0] , H for unsigned halfword load
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ldrh r7, [r2] @ load pu2_iscal_mat[0] , H for unsigned halfword load
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mul r6, r6, r7 @ pu2_iscal_mat[0]*pu2_weigh_mat[0]
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vdup.s32 q9, r6 @ Populate pu2_iscal_mat[0]*pu2_weigh_mat[0] 32-bit in Q9
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vpush {d8-d15}
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@=======================INVERSE HADAMARD TRANSFORM================================
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vld4.s16 {d0, d1, d2, d3}, [r0] @load x4,x5,x6,x7
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vaddl.s16 q12, d0, d3 @x0 = x4 + x7
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vaddl.s16 q13, d1, d2 @x1 = x5 + x6
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vsubl.s16 q14, d1, d2 @x2 = x5 - x6
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vsubl.s16 q15, d0, d3 @x3 = x4 - x7
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vadd.s32 q2, q12, q13 @pi4_tmp_ptr[0] = x0 + x1
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vadd.s32 q3, q15, q14 @pi4_tmp_ptr[1] = x3 + x2
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vsub.s32 q4, q12, q13 @pi4_tmp_ptr[2] = x0 - x1
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vsub.s32 q5, q15, q14 @pi4_tmp_ptr[3] = x3 - x2
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vtrn.32 q2, q3 @Transpose the register for vertical transform
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vtrn.32 q4, q5
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vswp d5, d8 @Q2 = x4, Q4 = x6
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vswp d7, d10 @Q3 = x5, Q5 = x7
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vadd.s32 q12, q2, q5 @x0 = x4+x7
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vadd.s32 q13, q3, q4 @x1 = x5+x6
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vsub.s32 q14, q3, q4 @x2 = x5-x6
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vsub.s32 q15, q2, q5 @x3 = x4-x7
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vadd.s32 q0, q12, q13 @pi4_tmp_ptr[0] = x0 + x1
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vadd.s32 q1, q15, q14 @pi4_tmp_ptr[1] = x3 + x2
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vsub.s32 q2, q12, q13 @pi4_tmp_ptr[2] = x0 - x1
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vsub.s32 q3, q15, q14 @pi4_tmp_ptr[3] = x3 - x2
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vmul.s32 q0, q0, q9 @ Q0 = p[i] = (x[i] * trns_coeff[i]) where i = 0..3
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vmul.s32 q1, q1, q9 @ Q1 = p[i] = (x[i] * trns_coeff[i]) where i = 4..7
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vmul.s32 q2, q2, q9 @ Q2 = p[i] = (x[i] * trns_coeff[i]) where i = 8..11
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vmul.s32 q3, q3, q9 @ Q3 = p[i] = (x[i] * trns_coeff[i]) where i = 12..15
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vshl.s32 q0, q0, q10 @ Q0 = q[i] = (p[i] << (qP/6)) where i = 0..3
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vshl.s32 q1, q1, q10 @ Q1 = q[i] = (p[i] << (qP/6)) where i = 4..7
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vshl.s32 q2, q2, q10 @ Q2 = q[i] = (p[i] << (qP/6)) where i = 8..11
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vshl.s32 q3, q3, q10 @ Q3 = q[i] = (p[i] << (qP/6)) where i = 12..15
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vqrshrn.s32 d0, q0, #0x6 @ D0 = c[i] = ((q[i] + 32) >> 4) where i = 0..3
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vqrshrn.s32 d1, q1, #0x6 @ D1 = c[i] = ((q[i] + 32) >> 4) where i = 4..7
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vqrshrn.s32 d2, q2, #0x6 @ D2 = c[i] = ((q[i] + 32) >> 4) where i = 8..11
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vqrshrn.s32 d3, q3, #0x6 @ D3 = c[i] = ((q[i] + 32) >> 4) where i = 12..15
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vst1.s16 {d0, d1, d2, d3}, [r1] @IV row store the value
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vpop {d8-d15}
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ldmfd sp!, {r4-r12, r15} @Reload the registers from SP
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@ *******************************************************************************
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@ *
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@ * @brief This function performs a 2x2 inverse hadamard transform for chroma block
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@ *
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@ * @par Description:
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@ * The DC coefficients pass through a 2-stage inverse hadamard transform.
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@ * This inverse transformed content is scaled to based on Qp value.
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@ * Both DC blocks of U and v blocks are processesd
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@ *
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@ * @param[in] pi2_src
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@ * input 1x8 block of ceffs. First 4 are from U and next from V
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@ *
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@ * @param[out] pi2_out
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@ * output 1x8 block
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@ *
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@ * @param[in] pu2_iscal_mat
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@ * pointer to scaling list
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@ *
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@ * @param[in] pu2_weigh_mat
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@ * pointer to weight matrix
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@ *
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@ * @param[in] u4_qp_div_6
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@ * Floor (qp/6)
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@ *
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@ * @returns none
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@ *
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@ * @remarks none
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@ *
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@ *******************************************************************************
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@ *
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@ *
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@ *******************************************************************************
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@ *
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@ void ih264_ihadamard_scaling_2x2_uv(WORD16* pi2_src,
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@ WORD16* pi2_out,
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@ const UWORD16 *pu2_iscal_mat,
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@ const UWORD16 *pu2_weigh_mat,
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@ UWORD32 u4_qp_div_6,
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.global ih264_ihadamard_scaling_2x2_uv_a9
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ih264_ihadamard_scaling_2x2_uv_a9:
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@Registers used
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@ r0 : *pi2_src
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@ r1 : *pi2_out
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@ r2 : *pu2_iscal_mat
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@ r3 : *pu2_weigh_mat
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vld1.u16 d26[0], [r2]
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vld1.u16 d27[0], [r3]
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vmull.u16 q15, d26, d27 @pu2_iscal_mat[0] * pu2_weigh_mat[0]
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vdup.u32 q15, d30[0]
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vld1.u16 d28[0], [sp] @load qp/6
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vpush {d8-d15}
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vmov.u16 d29, #5
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vsubl.u16 q14, d28, d29 @qp\6 - 5
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vdup.s32 q14, d28[0]
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vld2.s16 {d0, d1}, [r0] @load 8 dc coeffs
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@i2_x4,i2_x6,i2_y4,i1_y6 -> d0
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@i2_x5,i2_x7,i2_y5,i1_y6 -> d1
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vaddl.s16 q1, d0, d1 @ i4_x0 = i4_x4 + i4_x5;...x2
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vsubl.s16 q2, d0, d1 @ i4_x1 = i4_x4 - i4_x5;...x3
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vtrn.s32 q1, q2 @i4_x0 i4_x1 -> q1
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vadd.s32 q3, q1, q2 @i4_x4 = i4_x0+i4_x2;.. i4_x5
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vsub.s32 q1, q1, q2 @i4_x6 = i4_x0-i4_x2;.. i4_x7
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vmul.s32 q5, q3, q15
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vmul.s32 q6, q1, q15
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vshl.s32 q7, q5, q14
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vshl.s32 q8, q6, q14
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vmovn.s32 d18, q7 @i4_x4 i4_x5 i4_y4 i4_y5
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vmovn.s32 d19, q8 @i4_x6 i4_x7 i4_y6 i4_y7
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vst2.s32 {d18-d19}, [r1]
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vpop {d8-d15}
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bx lr
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