| //****************************************************************************** |
| //* |
| //* 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 |
| //*/ |
| |
| |
| //****************************************************************************** |
| //* |
| //* |
| //* @brief |
| //* This file contains definitions of routines for SAD caclulation |
| //* |
| //* @author |
| //* Ittiam |
| //* |
| //* @par List of Functions: |
| //* - icv_sad_8x4_av8() |
| //* |
| //* @remarks |
| //* None |
| //* |
| //******************************************************************************* |
| |
| |
| //****************************************************************************** |
| //* |
| //* @brief computes distortion (SAD) between 2 8x4 blocks |
| //* |
| //* |
| //* @par Description |
| //* This functions computes SAD between 2 8x4 blocks. |
| //* |
| //* @param[in] pu1_src |
| //* UWORD8 pointer to the source |
| //* |
| //* @param[out] pu1_ref |
| //* UWORD8 pointer to the reference buffer |
| //* |
| //* @param[in] src_strd |
| //* integer source stride |
| //* |
| //* @param[in] ref_strd |
| //* integer reference stride |
| //* |
| //* @param[in] wd |
| //* Width (assumed to be 8) |
| //* |
| //* @param[in] ht |
| //* Height (assumed to be 4) |
| //* |
| //* @returns |
| //* SAD value in r0 |
| //* |
| //* @remarks |
| //* |
| //****************************************************************************** |
| |
| .global icv_sad_8x4_av8 |
| |
| icv_sad_8x4_av8: |
| |
| // Load 8x4 source |
| ld1 {v0.8b}, [x0], x2 |
| ld1 {v1.8b}, [x0], x2 |
| ld1 {v2.8b}, [x0], x2 |
| ld1 {v3.8b}, [x0], x2 |
| |
| // Load 8x4 reference |
| ld1 {v4.8b}, [x1], x3 |
| ld1 {v5.8b}, [x1], x3 |
| ld1 {v6.8b}, [x1], x3 |
| ld1 {v7.8b}, [x1], x3 |
| |
| uabdl v0.8h, v0.8b, v4.8b |
| uabal v0.8h, v1.8b, v5.8b |
| uabal v0.8h, v2.8b, v6.8b |
| uabal v0.8h, v3.8b, v7.8b |
| |
| addp v0.8h, v0.8h, v0.8h |
| addp v0.8h, v0.8h, v0.8h |
| addp v0.8h, v0.8h, v0.8h |
| |
| smov x0, v0.8h[0] |
| |
| ret |
