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104 lines
2.4 KiB
104 lines
2.4 KiB
4 months ago
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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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@*
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@* @brief
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@* This file contains definitions of routines for SAD caclulation
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@*
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@* @author
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@* Ittiam
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@*
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@* @par List of Functions:
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@* - icv_sad_8x4_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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@*
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@* @brief computes distortion (SAD) between 2 8x4 blocks
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@*
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@*
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@* @par Description
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@* This functions computes SAD between 2 8x4 blocks.
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@*
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@* @param[in] pu1_src
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@* UWORD8 pointer to the source
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@*
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@* @param[out] pu1_ref
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@* UWORD8 pointer to the reference buffer
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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] ref_strd
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@* integer reference stride
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@*
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@* @param[in] wd
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@* Width (assumed to be 8)
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@*
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@* @param[in] ht
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@* Height (assumed to be 4)
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@*
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@* @returns
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@* SAD value in r0
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@*
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@* @remarks
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@*
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@******************************************************************************
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.global icv_sad_8x4_a9
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icv_sad_8x4_a9:
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push {lr}
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vld1.8 d4, [r0], r2
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vld1.8 d5, [r1], r3
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vld1.8 d6, [r0], r2
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vabdl.u8 q0, d5, d4
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vld1.8 d7, [r1], r3
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vabal.u8 q0, d7, d6
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vld1.8 d4, [r0], r2
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vld1.8 d5, [r1], r3
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vld1.8 d6, [r0], r2
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vabal.u8 q0, d5, d4
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vld1.8 d7, [r1], r3
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vabal.u8 q0, d7, d6
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vadd.i16 d0, d1, d0
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vpaddl.u16 d0, d0
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vpaddl.u32 d0, d0
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vmov.32 r0, d0[0]
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pop {pc}
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