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253 lines
6.7 KiB
ArmAsm
253 lines
6.7 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_inter_pred_chroma_a9q.s
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@*
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@* @brief
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@* Contains function definitions for inter prediction interpolation.
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@*
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@* @author
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@* Ittaim
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@*
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@* @par List of Functions:
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@*
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@* - ih264_inter_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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@* All the functions here are replicated from ih264_inter_pred_filters.c
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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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@*******************************************************************************
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@*
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@* @brief
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@* Interprediction chroma filter
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@*
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@* @par Description:
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@* Applies filtering to chroma samples as mentioned in
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@* sec 8.4.2.2.2 titled "chroma sample interpolation process"
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@*
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@* @param[in] pu1_src
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@* UWORD8 pointer to the source containing alternate U and V samples
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@*
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@* @param[out] pu1_dst
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@* UWORD8 pointer to the destination
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@*
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@* @param[in] src_strd
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@* integer source stride
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@*
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@* @param[in] dst_strd
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@* integer destination stride
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@*
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@* @param[in]uc_dx
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@* dx value where the sample is to be produced(refer sec 8.4.2.2.2 )
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@*
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@* @param[in] uc_dy
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@* dy value where the sample is to be produced(refer sec 8.4.2.2.2 )
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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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@*
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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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@void ih264_inter_pred_chroma(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 u1_dx,
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@ WORD32 u1_dy,
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@ WORD32 ht,
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@ WORD32 wd)
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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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@ r4 => u1_dx
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@ r5 => u1_dy
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@ r6 => height
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@ r7 => width
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@
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.text
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.p2align 2
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.global ih264_inter_pred_chroma_a9q
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ih264_inter_pred_chroma_a9q:
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stmfd sp!, {r4-r12, r14} @store register values to stack
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vstmdb sp!, {d8-d15} @push neon registers to stack
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ldr r4, [sp, #104]
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ldr r5, [sp, #108]
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ldr r6, [sp, #112]
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ldr r7, [sp, #116]
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rsb r8, r4, #8 @8-u1_dx
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rsb r9, r5, #8 @8-u1_dy
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mul r10, r8, r9
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mul r11, r4, r9
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vdup.u8 d28, r10
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vdup.u8 d29, r11
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mul r10, r8, r5
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mul r11, r4, r5
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vdup.u8 d30, r10
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vdup.u8 d31, r11
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subs r12, r7, #2 @if wd=4 branch to loop_4
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beq loop_2
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subs r12, r7, #4 @if wd=8 branch to loop_8
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beq loop_4
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loop_8:
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sub r6, #1
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vld1.8 {d0, d1, d2}, [r0], r2 @ Load row0
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vld1.8 {d5, d6, d7}, [r0], r2 @ Load row1
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vext.8 d3, d0, d1, #2
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vext.8 d8, d5, d6, #2
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vmull.u8 q5, d0, d28
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vmlal.u8 q5, d5, d30
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vmlal.u8 q5, d3, d29
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vmlal.u8 q5, d8, d31
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vext.8 d9, d6, d7, #2
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vext.8 d4, d1, d2, #2
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inner_loop_8:
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vmull.u8 q6, d6, d30
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vmlal.u8 q6, d1, d28
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vmlal.u8 q6, d9, d31
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vmlal.u8 q6, d4, d29
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vmov d0, d5
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vmov d3, d8
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vqrshrun.s16 d14, q5, #6
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vmov d1, d6
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vmov d4, d9
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vld1.8 {d5, d6, d7}, [r0], r2 @ Load row1
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vqrshrun.s16 d15, q6, #6
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vext.8 d8, d5, d6, #2
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subs r6, #1
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vext.8 d9, d6, d7, #2
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vst1.8 {q7}, [r1], r3 @ Store dest row
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vmull.u8 q5, d0, d28
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vmlal.u8 q5, d5, d30
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vmlal.u8 q5, d3, d29
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vmlal.u8 q5, d8, d31
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bne inner_loop_8
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vmull.u8 q6, d6, d30
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vmlal.u8 q6, d1, d28
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vmlal.u8 q6, d9, d31
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vmlal.u8 q6, d4, d29
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vqrshrun.s16 d14, q5, #6
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vqrshrun.s16 d15, q6, #6
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vst1.8 {q7}, [r1], r3 @ Store dest row
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b end_func
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loop_4:
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sub r6, #1
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vld1.8 {d0, d1}, [r0], r2 @ Load row0
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vld1.8 {d2, d3}, [r0], r2 @ Load row1
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vext.8 d1, d0, d1, #2
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vext.8 d3, d2, d3, #2
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vmull.u8 q2, d2, d30
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vmlal.u8 q2, d0, d28
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vmlal.u8 q2, d3, d31
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vmlal.u8 q2, d1, d29
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inner_loop_4:
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subs r6, #1
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vmov d0, d2
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vmov d1, d3
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vld1.8 {d2, d3}, [r0], r2 @ Load row1
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vqrshrun.s16 d6, q2, #6
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vext.8 d3, d2, d3, #2
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vst1.8 {d6}, [r1], r3 @ Store dest row
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vmull.u8 q2, d0, d28
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vmlal.u8 q2, d2, d30
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vmlal.u8 q2, d1, d29
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vmlal.u8 q2, d3, d31
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bne inner_loop_4
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vqrshrun.s16 d6, q2, #6
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vst1.8 {d6}, [r1], r3 @ Store dest row
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b end_func
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loop_2:
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vld1.8 {d0}, [r0], r2 @ Load row0
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vext.8 d1, d0, d0, #2
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vld1.8 {d2}, [r0], r2 @ Load row1
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vext.8 d3, d2, d2, #2
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vmull.u8 q2, d0, d28
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vmlal.u8 q2, d1, d29
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vmlal.u8 q2, d2, d30
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vmlal.u8 q2, d3, d31
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vld1.8 {d6}, [r0] @ Load row2
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vqrshrun.s16 d4, q2, #6
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vext.8 d7, d6, d6, #2
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vst1.32 d4[0], [r1], r3 @ Store dest row0
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vmull.u8 q4, d2, d28
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vmlal.u8 q4, d3, d29
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vmlal.u8 q4, d6, d30
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vmlal.u8 q4, d7, d31
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subs r6, #2
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vqrshrun.s16 d8, q4, #6
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vst1.32 d8[0], [r1], r3 @ Store dest row1
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bne loop_2 @ repeat if ht=2
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end_func:
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vldmia sp!, {d8-d15} @ Restore neon registers that were saved
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ldmfd sp!, {r4-r12, pc} @ Restoring registers from stack
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