| //****************************************************************************** |
| //* |
| //* 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 spatial filter |
| //* |
| //* @author |
| //* Ittiam |
| //* |
| //* @par List of Functions: |
| //* - ideint_cac_8x8_av8() |
| //* |
| //* @remarks |
| //* None |
| //* |
| //******************************************************************************* |
| |
| |
| //****************************************************************************** |
| //* |
| //* @brief Calculates Combing Artifact |
| //* |
| //* @par Description |
| //* This functions calculates combing artifact check (CAC) for given two fields |
| //* |
| //* @param[in] pu1_top |
| //* UWORD8 pointer to top field |
| //* |
| //* @param[in] pu1_bot |
| //* UWORD8 pointer to bottom field |
| //* |
| //* @param[in] top_strd |
| //* Top field stride |
| //* |
| //* @param[in] bot_strd |
| //* Bottom field stride |
| //* |
| //* @returns |
| //* None |
| //* |
| //* @remarks |
| //* |
| //****************************************************************************** |
| |
| .global ideint_cac_8x8_av8 |
| |
| ideint_cac_8x8_av8: |
| |
| // Load first row of top |
| ld1 {v28.8b}, [x0], x2 |
| |
| // Load first row of bottom |
| ld1 {v29.8b}, [x1], x3 |
| mov v28.d[1], v29.d[0] |
| |
| // Load second row of top |
| ld1 {v30.8b}, [x0], x2 |
| |
| // Load second row of bottom |
| ld1 {v31.8b}, [x1], x3 |
| mov v30.d[1], v31.d[0] |
| |
| |
| // Calculate row based adj and alt values |
| // Get row sums |
| uaddlp v0.8h, v28.16b |
| |
| uaddlp v2.8h, v30.16b |
| |
| uaddlp v0.4s, v0.8h |
| |
| uaddlp v2.4s, v2.8h |
| |
| // Both v0 and v2 have four 32 bit sums corresponding to first 4 rows |
| // Pack v0 and v2 into a single register (sum does not exceed 16bits) |
| |
| shl v16.4s, v2.4s, #16 |
| orr v16.16b, v0.16b, v16.16b |
| // v16 now contains 8 sums |
| |
| // Load third row of top |
| ld1 {v24.8b}, [x0], x2 |
| |
| // Load third row of bottom |
| ld1 {v25.8b}, [x1], x3 |
| mov v24.d[1], v25.d[0] |
| |
| // Load fourth row of top |
| ld1 {v26.8b}, [x0], x2 |
| |
| // Load fourth row of bottom |
| ld1 {v27.8b}, [x1], x3 |
| mov v26.d[1], v27.d[0] |
| |
| // Get row sums |
| uaddlp v4.8h, v24.16b |
| |
| uaddlp v6.8h, v26.16b |
| |
| uaddlp v4.4s, v4.8h |
| |
| uaddlp v6.4s, v6.8h |
| // Both v4 and v6 have four 32 bit sums corresponding to last 4 rows |
| // Pack v4 and v6 into a single register (sum does not exceed 16bits) |
| |
| shl v18.4s, v6.4s, #16 |
| orr v18.16b, v4.16b, v18.16b |
| // v18 now contains 8 sums |
| |
| // Compute absolute diff between top and bottom row sums |
| mov v17.d[0], v16.d[1] |
| uabd v16.4h, v16.4h, v17.4h |
| |
| mov v19.d[0], v18.d[1] |
| uabd v17.4h, v18.4h, v19.4h |
| |
| mov v16.d[1], v17.d[0] |
| |
| // RSUM_CSUM_THRESH |
| movi v18.8h, #20 |
| |
| // Eliminate values smaller than RSUM_CSUM_THRESH |
| cmhs v20.8h, v16.8h, v18.8h |
| and v20.16b, v16.16b, v20.16b |
| |
| // v20 now contains 8 absolute diff of sums above the threshold |
| |
| // Compute adj |
| mov v21.d[0], v20.d[1] |
| add v20.4h, v20.4h, v21.4h |
| |
| // v20 has four adj values for two sub-blocks |
| |
| // Compute alt |
| uabd v0.4s, v0.4s, v2.4s |
| uabd v4.4s, v4.4s, v6.4s |
| |
| add v0.4s, v0.4s, v4.4s |
| |
| mov v1.d[0], v0.d[1] |
| add v21.4s, v0.4s, v1.4s |
| // d21 has two values for two sub-blocks |
| |
| |
| // Calculate column based adj and alt values |
| |
| urhadd v0.16b, v28.16b, v30.16b |
| urhadd v2.16b, v24.16b, v26.16b |
| urhadd v0.16b, v0.16b, v2.16b |
| |
| mov v1.d[0], v0.d[1] |
| uabd v0.8b, v0.8b, v1.8b |
| |
| // RSUM_CSUM_THRESH >> 2 |
| movi v22.16b, #5 |
| |
| // Eliminate values smaller than RSUM_CSUM_THRESH >> 2 |
| cmhs v1.16b, v0.16b, v22.16b |
| and v0.16b, v0.16b, v1.16b |
| // d0 now contains 8 absolute diff of sums above the threshold |
| |
| |
| uaddlp v0.4h, v0.8b |
| shl v0.4h, v0.4h,#2 |
| |
| // Add row based adj |
| add v20.4h, v0.4h, v20.4h |
| |
| uaddlp v20.2s, v20.4h |
| // d20 now contains 2 adj values |
| |
| |
| urhadd v0.8b, v28.8b, v29.8b |
| urhadd v2.8b, v24.8b, v25.8b |
| urhadd v0.8b, v0.8b, v2.8b |
| |
| urhadd v1.8b, v30.8b, v31.8b |
| urhadd v3.8b, v26.8b, v27.8b |
| urhadd v1.8b, v1.8b, v3.8b |
| |
| uabd v0.8b, v0.8b, v1.8b |
| uaddlp v0.4h, v0.8b |
| |
| shl v0.4h, v0.4h, #2 |
| uaddlp v0.2s, v0.4h |
| add v21.2s, v0.2s, v21.2s |
| |
| |
| // d21 now contains 2 alt values |
| |
| // SAD_BIAS_MULT_SHIFT |
| ushr v0.2s, v21.2s, #3 |
| add v21.2s, v21.2s, v0.2s |
| |
| // SAD_BIAS_ADDITIVE >> 1 |
| movi v0.2s, #4 |
| add v21.2s, v21.2s, v0.2s |
| |
| cmhi v0.2s, v20.2s, v21.2s |
| uaddlp v0.1d, v0.2s |
| |
| smov x0, v0.s[0] |
| cmp x0, #0 |
| mov x4, #1 |
| csel x0, x4, x0, ne |
| ret |
