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480 lines
20 KiB
ArmAsm
480 lines
20 KiB
ArmAsm
@/******************************************************************************
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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_a9q.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_a9q()
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@* - ih264_weighted_pred_chroma_a9q()
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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_a9q()
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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] pu1_src:
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@* UWORD8 Pointer to the buffer containing the input block.
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@*
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@* @param[out] pu1_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_a9q(UWORD8 *pu1_src,
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@ UWORD8 *pu1_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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@ r0 => pu1_src
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@ r1 => pu1_dst
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@ r2 => src_strd
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@ r3 => dst_strd
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@ [sp] => log_wd (r4)
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@ [sp+4] => wt (r5)
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@ [sp+8] => ofst (r6)
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@ [sp+12] => ht (r7)
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@ [sp+16] => wd (r8)
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@
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.text
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.p2align 2
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.global ih264_weighted_pred_luma_a9q
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ih264_weighted_pred_luma_a9q:
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stmfd sp!, {r4-r9, r14} @stack stores the values of the arguments
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ldr r5, [sp, #32] @Load wt
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ldr r4, [sp, #28] @Load log_wd in r4
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ldr r6, [sp, #36] @Load ofst
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ldr r7, [sp, #40] @Load ht
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ldr r8, [sp, #44] @Load wd
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vpush {d8-d15}
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vdup.16 d2, r5 @D2 = wt (16-bit)
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neg r9, r4 @r9 = -log_wd
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vdup.8 d3, r6 @D3 = ofst (8-bit)
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cmp r8, #16 @check if wd is 16
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vdup.16 q0, r9 @Q0 = -log_wd (16-bit)
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beq loop_16 @branch if wd is 16
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cmp r8, #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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vld1.32 d4[0], [r0], r2 @load row 1 in source
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vld1.32 d4[1], [r0], r2 @load row 2 in source
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vld1.32 d6[0], [r0], r2 @load row 3 in source
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vld1.32 d6[1], [r0], r2 @load row 4 in source
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vmovl.u8 q2, d4 @converting rows 1,2 to 16-bit
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vmovl.u8 q3, d6 @converting rows 3,4 to 16-bit
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vmul.s16 q2, q2, d2[0] @weight mult. for rows 1,2
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vmul.s16 q3, q3, d2[0] @weight mult. for rows 3,4
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subs r7, r7, #4 @decrement ht by 4
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vrshl.s16 q2, q2, q0 @rounds off the weighted samples from rows 1,2
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vrshl.s16 q3, q3, q0 @rounds off the weighted samples from rows 3,4
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vaddw.s8 q2, q2, d3 @adding offset for rows 1,2
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vaddw.s8 q3, q3, d3 @adding offset for rows 3,4
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vqmovun.s16 d4, q2 @saturating rows 1,2 to unsigned 8-bit
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vqmovun.s16 d6, q3 @saturating rows 3,4 to unsigned 8-bit
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vst1.32 d4[0], [r1], r3 @store row 1 in destination
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vst1.32 d4[1], [r1], r3 @store row 2 in destination
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vst1.32 d6[0], [r1], r3 @store row 3 in destination
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vst1.32 d6[1], [r1], r3 @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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vld1.8 d4, [r0], r2 @load row 1 in source
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vld1.8 d6, [r0], r2 @load row 2 in source
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vld1.8 d8, [r0], r2 @load row 3 in source
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vmovl.u8 q2, d4 @converting row 1 to 16-bit
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vld1.8 d10, [r0], r2 @load row 4 in source
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vmovl.u8 q3, d6 @converting row 2 to 16-bit
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vmovl.u8 q4, d8 @converting row 3 to 16-bit
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vmul.s16 q2, q2, d2[0] @weight mult. for row 1
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vmovl.u8 q5, d10 @converting row 4 to 16-bit
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vmul.s16 q3, q3, d2[0] @weight mult. for row 2
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vmul.s16 q4, q4, d2[0] @weight mult. for row 3
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vmul.s16 q5, q5, d2[0] @weight mult. for row 4
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vrshl.s16 q2, q2, q0 @rounds off the weighted samples from row 1
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vrshl.s16 q3, q3, q0 @rounds off the weighted samples from row 2
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vrshl.s16 q4, q4, q0 @rounds off the weighted samples from row 3
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vaddw.s8 q2, q2, d3 @adding offset for row 1
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vrshl.s16 q5, q5, q0 @rounds off the weighted samples from row 4
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vaddw.s8 q3, q3, d3 @adding offset for row 2
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vaddw.s8 q4, q4, d3 @adding offset for row 3
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vqmovun.s16 d4, q2 @saturating row 1 to unsigned 8-bit
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vaddw.s8 q5, q5, d3 @adding offset for row 4
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vqmovun.s16 d6, q3 @saturating row 2 to unsigned 8-bit
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vqmovun.s16 d8, q4 @saturating row 3 to unsigned 8-bit
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vqmovun.s16 d10, q5 @saturating row 4 to unsigned 8-bit
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vst1.8 d4, [r1], r3 @store row 1 in destination
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vst1.8 d6, [r1], r3 @store row 2 in destination
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subs r7, r7, #4 @decrement ht by 4
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vst1.8 d8, [r1], r3 @store row 3 in destination
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vst1.8 d10, [r1], r3 @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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vld1.8 {q2}, [r0], r2 @load row 1 in source
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vld1.8 {q3}, [r0], r2 @load row 2 in source
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vmovl.u8 q6, d4 @converting row 1L to 16-bit
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vld1.8 {q4}, [r0], r2 @load row 3 in source
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vmovl.u8 q7, d5 @converting row 1H to 16-bit
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vld1.8 {q5}, [r0], r2 @load row 4 in source
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vmovl.u8 q8, d6 @converting row 2L to 16-bit
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vmul.s16 q6, q6, d2[0] @weight mult. for row 1L
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vmovl.u8 q9, d7 @converting row 2H to 16-bit
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vmul.s16 q7, q7, d2[0] @weight mult. for row 1H
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vmovl.u8 q10, d8 @converting row 3L to 16-bit
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vmul.s16 q8, q8, d2[0] @weight mult. for row 2L
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vmovl.u8 q11, d9 @converting row 3H to 16-bit
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vmul.s16 q9, q9, d2[0] @weight mult. for row 2H
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vmovl.u8 q12, d10 @converting row 4L to 16-bit
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vmul.s16 q10, q10, d2[0] @weight mult. for row 3L
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vmovl.u8 q13, d11 @converting row 4H to 16-bit
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vmul.s16 q11, q11, d2[0] @weight mult. for row 3H
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vmul.s16 q12, q12, d2[0] @weight mult. for row 4L
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vrshl.s16 q6, q6, q0 @rounds off the weighted samples from row 1L
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vmul.s16 q13, q13, d2[0] @weight mult. for row 4H
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vrshl.s16 q7, q7, q0 @rounds off the weighted samples from row 1H
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vrshl.s16 q8, q8, q0 @rounds off the weighted samples from row 2L
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vaddw.s8 q6, q6, d3 @adding offset for row 1L
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vrshl.s16 q9, q9, q0 @rounds off the weighted samples from row 2H
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vaddw.s8 q7, q7, d3 @adding offset for row 1H
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vqmovun.s16 d4, q6 @saturating row 1L to unsigned 8-bit
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vrshl.s16 q10, q10, q0 @rounds off the weighted samples from row 3L
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vaddw.s8 q8, q8, d3 @adding offset for row 2L
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vqmovun.s16 d5, q7 @saturating row 1H to unsigned 8-bit
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vrshl.s16 q11, q11, q0 @rounds off the weighted samples from row 3H
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vaddw.s8 q9, q9, d3 @adding offset for row 2H
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vqmovun.s16 d6, q8 @saturating row 2L to unsigned 8-bit
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vrshl.s16 q12, q12, q0 @rounds off the weighted samples from row 4L
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vaddw.s8 q10, q10, d3 @adding offset for row 3L
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vqmovun.s16 d7, q9 @saturating row 2H to unsigned 8-bit
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vrshl.s16 q13, q13, q0 @rounds off the weighted samples from row 4H
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vaddw.s8 q11, q11, d3 @adding offset for row 3H
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vqmovun.s16 d8, q10 @saturating row 3L to unsigned 8-bit
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vaddw.s8 q12, q12, d3 @adding offset for row 4L
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vqmovun.s16 d9, q11 @saturating row 3H to unsigned 8-bit
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vaddw.s8 q13, q13, d3 @adding offset for row 4H
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vqmovun.s16 d10, q12 @saturating row 4L to unsigned 8-bit
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vst1.8 {q2}, [r1], r3 @store row 1 in destination
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vqmovun.s16 d11, q13 @saturating row 4H to unsigned 8-bit
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vst1.8 {q3}, [r1], r3 @store row 2 in destination
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subs r7, r7, #4 @decrement ht by 4
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vst1.8 {q4}, [r1], r3 @store row 3 in destination
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vst1.8 {q5}, [r1], r3 @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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vpop {d8-d15}
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ldmfd sp!, {r4-r9, r15} @Reload the registers from sp
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@*******************************************************************************
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@* @function
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@* ih264_weighted_pred_chroma_a9q()
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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] pu1_src:
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@* UWORD8 Pointer to the buffer containing the input block.
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@*
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@* @param[out] pu1_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_a9q(UWORD8 *pu1_src,
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@ UWORD8 *pu1_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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@ r0 => pu1_src
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@ r1 => pu1_dst
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@ r2 => src_strd
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@ r3 => dst_strd
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@ [sp] => log_wd (r4)
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@ [sp+4] => wt (r5)
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@ [sp+8] => ofst (r6)
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@ [sp+12] => ht (r7)
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@ [sp+16] => wd (r8)
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@
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.global ih264_weighted_pred_chroma_a9q
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ih264_weighted_pred_chroma_a9q:
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stmfd sp!, {r4-r9, r14} @stack stores the values of the arguments
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ldr r4, [sp, #28] @Load log_wd in r4
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ldr r5, [sp, #32] @Load wt = {wt_u (16-bit), wt_v (16-bit)}
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ldr r6, [sp, #36] @Load ofst = {ofst_u (8-bit), ofst_v (8-bit)}
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ldr r8, [sp, #44] @Load wd
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neg r9, r4 @r9 = -log_wd
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vdup.32 q1, r5 @Q1 = {wt_u (16-bit), wt_v (16-bit)}
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ldr r7, [sp, #40] @Load ht
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vpush {d8-d15}
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vdup.16 d4, r6 @D4 = {ofst_u (8-bit), ofst_v (8-bit)}
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cmp r8, #8 @check if wd is 8
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vdup.16 q0, r9 @Q0 = -log_wd (16-bit)
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beq loop_8_uv @branch if wd is 8
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cmp r8, #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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vld1.32 d6[0], [r0], r2 @load row 1 in source
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vld1.32 d6[1], [r0], r2 @load row 2 in source
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vmovl.u8 q3, d6 @converting rows 1,2 to 16-bit
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vmul.s16 q3, q3, q1 @weight mult. for rows 1,2
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vrshl.s16 q3, q3, q0 @rounds off the weighted samples from rows 1,2
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vaddw.s8 q3, q3, d4 @adding offset for rows 1,2
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vqmovun.s16 d6, q3 @saturating rows 1,2 to unsigned 8-bit
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subs r7, r7, #2 @decrement ht by 2
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vst1.32 d6[0], [r1], r3 @store row 1 in destination
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vst1.32 d6[1], [r1], r3 @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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vld1.8 d6, [r0], r2 @load row 1 in source
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vld1.8 d8, [r0], r2 @load row 2 in source
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vmovl.u8 q3, d6 @converting row 1 to 16-bit
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vmovl.u8 q4, d8 @converting row 2 to 16-bit
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vmul.s16 q3, q3, q1 @weight mult. for row 1
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vmul.s16 q4, q4, q1 @weight mult. for row 2
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subs r7, r7, #2 @decrement ht by 2
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vrshl.s16 q3, q3, q0 @rounds off the weighted samples from row 1
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vrshl.s16 q4, q4, q0 @rounds off the weighted samples from row 2
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vaddw.s8 q3, q3, d4 @adding offset for row 1
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vaddw.s8 q4, q4, d4 @adding offset for row 2
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vqmovun.s16 d6, q3 @saturating row 1 to unsigned 8-bit
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vqmovun.s16 d8, q4 @saturating row 2 to unsigned 8-bit
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vst1.8 d6, [r1], r3 @store row 1 in destination
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vst1.8 d8, [r1], r3 @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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vld1.8 {q3}, [r0], r2 @load row 1 in source
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vld1.8 {q4}, [r0], r2 @load row 2 in source
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vmovl.u8 q7, d6 @converting row 1L to 16-bit
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vld1.8 {q5}, [r0], r2 @load row 3 in source
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vmovl.u8 q8, d7 @converting row 1H to 16-bit
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vld1.8 {q6}, [r0], r2 @load row 4 in source
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vmul.s16 q7, q7, q1 @weight mult. for row 1L
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vmovl.u8 q9, d8 @converting row 2L to 16-bit
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vmul.s16 q8, q8, q1 @weight mult. for row 1H
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vmovl.u8 q10, d9 @converting row 2H to 16-bit
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vmul.s16 q9, q9, q1 @weight mult. for row 2L
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vmovl.u8 q11, d10 @converting row 3L to 16-bit
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vmul.s16 q10, q10, q1 @weight mult. for row 2H
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vmovl.u8 q12, d11 @converting row 3H to 16-bit
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vmul.s16 q11, q11, q1 @weight mult. for row 3L
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vmovl.u8 q13, d12 @converting row 4L to 16-bit
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vmul.s16 q12, q12, q1 @weight mult. for row 3H
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vmovl.u8 q14, d13 @converting row 4H to 16-bit
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vmul.s16 q13, q13, q1 @weight mult. for row 4L
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vrshl.s16 q7, q7, q0 @rounds off the weighted samples from row 1L
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vmul.s16 q14, q14, q1 @weight mult. for row 4H
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vrshl.s16 q8, q8, q0 @rounds off the weighted samples from row 1H
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vrshl.s16 q9, q9, q0 @rounds off the weighted samples from row 2L
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vaddw.s8 q7, q7, d4 @adding offset for row 1L
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vrshl.s16 q10, q10, q0 @rounds off the weighted samples from row 2H
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vaddw.s8 q8, q8, d4 @adding offset for row 1H
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vqmovun.s16 d6, q7 @saturating row 1L to unsigned 8-bit
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vrshl.s16 q11, q11, q0 @rounds off the weighted samples from row 3L
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vaddw.s8 q9, q9, d4 @adding offset for row 2L
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vqmovun.s16 d7, q8 @saturating row 1H to unsigned 8-bit
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vrshl.s16 q12, q12, q0 @rounds off the weighted samples from row 3H
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vaddw.s8 q10, q10, d4 @adding offset for row 2H
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vqmovun.s16 d8, q9 @saturating row 2L to unsigned 8-bit
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vrshl.s16 q13, q13, q0 @rounds off the weighted samples from row 4L
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vaddw.s8 q11, q11, d4 @adding offset for row 3L
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vqmovun.s16 d9, q10 @saturating row 2H to unsigned 8-bit
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vrshl.s16 q14, q14, q0 @rounds off the weighted samples from row 4H
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vaddw.s8 q12, q12, d4 @adding offset for row 3H
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vqmovun.s16 d10, q11 @saturating row 3L to unsigned 8-bit
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vaddw.s8 q13, q13, d4 @adding offset for row 4L
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vqmovun.s16 d11, q12 @saturating row 3H to unsigned 8-bit
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vaddw.s8 q14, q14, d4 @adding offset for row 4H
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vqmovun.s16 d12, q13 @saturating row 4L to unsigned 8-bit
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vst1.8 {q3}, [r1], r3 @store row 1 in destination
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vqmovun.s16 d13, q14 @saturating row 4H to unsigned 8-bit
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vst1.8 {q4}, [r1], r3 @store row 2 in destination
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subs r7, r7, #4 @decrement ht by 4
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vst1.8 {q5}, [r1], r3 @store row 3 in destination
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vst1.8 {q6}, [r1], r3 @store row 4 in destination
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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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vpop {d8-d15}
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ldmfd sp!, {r4-r9, r15} @Reload the registers from sp
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