//****************************************************************************** //* //* 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 //*/ ///** //****************************************************************************** //* @file //* ih264_default_weighted_pred_av8.s //* //* @brief //* Contains function definitions for default weighted prediction. //* //* @author //* Kaushik Senthoor R //* //* @par List of Functions: //* //* - ih264_default_weighted_pred_luma_av8() //* - ih264_default_weighted_pred_chroma_av8() //* //* @remarks //* None //* //******************************************************************************* //*/ //******************************************************************************* //* @function //* ih264_default_weighted_pred_luma_av8() //* //* @brief //* This routine performs the default weighted prediction as described in sec //* 8.4.2.3.1 titled "Default weighted sample prediction process" for luma. //* //* @par Description: //* This function gets two ht x wd blocks, calculates their rounded-average and //* stores it in the destination block. //* //* @param[in] puc_src1: //* UWORD8 Pointer to the buffer containing the first input block. //* //* @param[in] puc_src2: //* UWORD8 Pointer to the buffer containing the second input block. //* //* @param[out] puc_dst //* UWORD8 pointer to the destination where the output block is stored. //* //* @param[in] src_strd1 //* Stride of the first input buffer //* //* @param[in] src_strd2 //* Stride of the second input buffer //* //* @param[in] dst_strd //* Stride of the destination buffer //* //* @param[in] ht //* integer height of the array //* //* @param[in] wd //* integer width of the array //* //* @returns //* None //* //* @remarks //* (ht,wd) can be (4,4), (4,8), (8,4), (8,8), (8,16), (16,8) or (16,16). //* //******************************************************************************* //*/ //void ih264_default_weighted_pred_luma_av8(UWORD8 *puc_src1, // UWORD8 *puc_src2, // UWORD8 *puc_dst, // WORD32 src_strd1, // WORD32 src_strd2, // WORD32 dst_strd, // WORD32 ht, // WORD32 wd) // //**************Variables Vs Registers***************************************** // x0 => puc_src1 // x1 => puc_src2 // x2 => puc_dst // w3 => src_strd1 // w4 => src_strd2 // w5 => dst_strd // w6 => ht // w7 => wd // .text .p2align 2 .include "ih264_neon_macros.s" .global ih264_default_weighted_pred_luma_av8 ih264_default_weighted_pred_luma_av8: push_v_regs stp x19, x20, [sp, #-16]! sxtw x3, w3 sxtw x4, w4 sxtw x5, w5 cmp w7, #16 beq loop_16 //branch if wd is 16 cmp w7, #8 beq loop_8 //branch if wd is 8 loop_4: //each iteration processes four rows ld1 {v0.s}[0], [x0], x3 //load row 1 in source 1 ld1 {v0.s}[1], [x0], x3 //load row 2 in source 1 ld1 {v2.s}[0], [x1], x4 //load row 1 in source 2 ld1 {v2.s}[1], [x1], x4 //load row 2 in source 2 ld1 {v1.s}[0], [x0], x3 //load row 3 in source 1 ld1 {v1.s}[1], [x0], x3 //load row 4 in source 1 urhadd v0.8b, v0.8b , v2.8b ld1 {v3.s}[0], [x1], x4 //load row 3 in source 2 ld1 {v3.s}[1], [x1], x4 //load row 4 in source 2 subs w6, w6, #4 //decrement ht by 4 st1 {v0.s}[0], [x2], x5 //load row 1 in destination st1 {v0.s}[1], [x2], x5 //load row 2 in destination urhadd v1.8b, v1.8b , v3.8b st1 {v1.s}[0], [x2], x5 //load row 3 in destination st1 {v1.s}[1], [x2], x5 //load row 4 in destination bgt loop_4 //if greater than 0 repeat the loop again b end_loops loop_8: //each iteration processes four rows ld1 {v0.8b}, [x0], x3 //load row 1 in source 1 ld1 {v4.8b}, [x1], x4 //load row 1 in source 2 ld1 {v1.8b}, [x0], x3 //load row 2 in source 1 ld1 {v5.8b}, [x1], x4 //load row 2 in source 2 ld1 {v2.8b}, [x0], x3 //load row 3 in source 1 urhadd v0.16b, v0.16b , v4.16b urhadd v1.16b, v1.16b , v5.16b ld1 {v6.8b}, [x1], x4 //load row 3 in source 2 ld1 {v3.8b}, [x0], x3 //load row 4 in source 1 urhadd v2.8b, v2.8b , v6.8b ld1 {v7.8b}, [x1], x4 //load row 4 in source 2 subs w6, w6, #4 //decrement ht by 4 st1 {v0.8b}, [x2], x5 //load row 1 in destination urhadd v3.8b, v3.8b , v7.8b st1 {v1.8b}, [x2], x5 //load row 2 in destination st1 {v2.8b}, [x2], x5 //load row 3 in destination st1 {v3.8b}, [x2], x5 //load row 4 in destination bgt loop_8 //if greater than 0 repeat the loop again b end_loops loop_16: //each iteration processes eight rows ld1 {v0.8b, v1.8b}, [x0], x3 //load row 1 in source 1 ld1 {v16.8b, v17.8b}, [x1], x4 //load row 1 in source 2 ld1 {v2.8b, v3.8b}, [x0], x3 //load row 2 in source 1 ld1 {v18.8b, v19.8b}, [x1], x4 //load row 2 in source 2 urhadd v0.16b, v0.16b , v16.16b urhadd v1.16b, v1.16b , v17.16b ld1 {v4.8b, v5.8b}, [x0], x3 //load row 3 in source 1 ld1 {v20.8b, v21.8b}, [x1], x4 //load row 3 in source 2 urhadd v2.16b, v2.16b , v18.16b urhadd v3.16b, v3.16b , v19.16b ld1 {v6.8b, v7.8b}, [x0], x3 //load row 4 in source 1 ld1 {v22.8b, v23.8b}, [x1], x4 //load row 4 in source 2 urhadd v4.16b, v4.16b , v20.16b urhadd v5.16b, v5.16b , v21.16b ld1 {v8.8b, v9.8b}, [x0], x3 //load row 5 in source 1 ld1 {v24.8b, v25.8b}, [x1], x4 //load row 5 in source 2 urhadd v6.16b, v6.16b , v22.16b urhadd v7.16b, v7.16b , v23.16b ld1 {v10.8b, v11.8b}, [x0], x3 //load row 6 in source 1 ld1 {v26.8b, v27.8b}, [x1], x4 //load row 6 in source 2 urhadd v8.16b, v8.16b , v24.16b urhadd v9.16b, v9.16b , v25.16b ld1 {v12.8b, v13.8b}, [x0], x3 //load row 7 in source 1 ld1 {v28.8b, v29.8b}, [x1], x4 //load row 7 in source 2 urhadd v10.16b, v10.16b , v26.16b urhadd v11.16b, v11.16b , v27.16b ld1 {v14.8b, v15.8b}, [x0], x3 //load row 8 in source 1 ld1 {v30.8b, v31.8b}, [x1], x4 //load row 8 in source 2 urhadd v12.16b, v12.16b , v28.16b urhadd v13.16b, v13.16b , v29.16b st1 {v0.8b, v1.8b}, [x2], x5 //load row 1 in destination st1 {v2.8b, v3.8b}, [x2], x5 //load row 2 in destination urhadd v14.16b, v14.16b , v30.16b urhadd v15.16b, v15.16b , v31.16b st1 {v4.8b, v5.8b}, [x2], x5 //load row 3 in destination st1 {v6.8b, v7.8b}, [x2], x5 //load row 4 in destination subs w6, w6, #8 //decrement ht by 8 st1 {v8.8b, v9.8b}, [x2], x5 //load row 5 in destination st1 {v10.8b, v11.8b}, [x2], x5 //load row 6 in destination st1 {v12.8b, v13.8b}, [x2], x5 //load row 7 in destination st1 {v14.8b, v15.8b}, [x2], x5 //load row 8 in destination bgt loop_16 //if greater than 0 repeat the loop again end_loops: // LDMFD sp!,{x4-x7,x15} //Reload the registers from sp ldp x19, x20, [sp], #16 pop_v_regs ret //******************************************************************************* //* @function //* ih264_default_weighted_pred_chroma_av8() //* //* @brief //* This routine performs the default weighted prediction as described in sec //* 8.4.2.3.1 titled "Default weighted sample prediction process" for chroma. //* //* @par Description: //* This function gets two ht x wd blocks, calculates their rounded-average and //* stores it in the destination block for U and V. //* //* @param[in] puc_src1: //* UWORD8 Pointer to the buffer containing the first input block. //* //* @param[in] puc_src2: //* UWORD8 Pointer to the buffer containing the second input block. //* //* @param[out] puc_dst //* UWORD8 pointer to the destination where the output block is stored. //* //* @param[in] src_strd1 //* Stride of the first input buffer //* //* @param[in] src_strd2 //* Stride of the second input buffer //* //* @param[in] dst_strd //* Stride of the destination buffer //* //* @param[in] ht //* integer height of the array //* //* @param[in] wd //* integer width of the array //* //* @returns //* None //* //* @remarks //* (ht,wd) can be (2,2), (2,4), (4,2), (4,4), (4,8), (8,4) or (8,8). //* //******************************************************************************* //*/ //void ih264_default_weighted_pred_chroma_av8(UWORD8 *puc_src1, // UWORD8 *puc_src2, // UWORD8 *puc_dst, // WORD32 src_strd1, // WORD32 src_strd2, // WORD32 dst_strd, // WORD32 ht, // WORD32 wd) // //**************Variables Vs Registers***************************************** // x0 => puc_src1 // x1 => puc_src2 // x2 => puc_dst // w3 => src_strd1 // w4 => src_strd2 // w5 => dst_strd // w6 => ht // w7 => wd // .global ih264_default_weighted_pred_chroma_av8 ih264_default_weighted_pred_chroma_av8: push_v_regs stp x19, x20, [sp, #-16]! sxtw x3, w3 sxtw x4, w4 sxtw x5, w5 cmp w7, #8 beq loop_8_uv //branch if wd is 8 cmp w7, #4 beq loop_4_uv //branch if wd is 4 loop_2_uv: //each iteration processes two rows ld1 {v0.s}[0], [x0], x3 //load row 1 in source 1 ld1 {v0.s}[1], [x0], x3 //load row 2 in source 1 ld1 {v1.s}[0], [x1], x4 //load row 1 in source 2 ld1 {v1.s}[1], [x1], x4 //load row 2 in source 2 urhadd v0.8b, v0.8b , v1.8b subs w6, w6, #2 //decrement ht by 2 st1 {v0.s}[0], [x2], x5 //load row 1 in destination st1 {v0.s}[1], [x2], x5 //load row 2 in destination bgt loop_2_uv //if greater than 0 repeat the loop again b end_loops_uv loop_4_uv: //each iteration processes two rows ld1 {v0.8b}, [x0], x3 //load row 1 in source 1 ld1 {v2.8b}, [x1], x4 //load row 1 in source 2 ld1 {v1.8b}, [x0], x3 //load row 2 in source 1 urhadd v0.8b, v0.8b , v2.8b ld1 {v3.8b}, [x1], x4 //load row 2 in source 2 urhadd v1.8b, v1.8b , v3.8b st1 {v0.8b}, [x2], x5 //load row 1 in destination subs w6, w6, #2 //decrement ht by 2 st1 {v1.8b}, [x2], x5 //load row 2 in destination bgt loop_4_uv //if greater than 0 repeat the loop again b end_loops_uv loop_8_uv: //each iteration processes four rows ld1 {v0.8b, v1.8b}, [x0], x3 //load row 1 in source 1 ld1 {v8.8b, v9.8b}, [x1], x4 //load row 1 in source 2 ld1 {v2.8b, v3.8b}, [x0], x3 //load row 2 in source 1 urhadd v0.16b, v0.16b , v8.16b urhadd v1.16b, v1.16b , v9.16b ld1 {v10.8b, v11.8b}, [x1], x4 //load row 2 in source 2 ld1 {v4.8b, v5.8b}, [x0], x3 //load row 3 in source 1 urhadd v2.16b, v2.16b , v10.16b urhadd v3.16b, v3.16b , v11.16b ld1 {v12.8b, v13.8b}, [x1], x4 //load row 3 in source 2 ld1 {v6.8b, v7.8b}, [x0], x3 //load row 4 in source 1 urhadd v4.16b, v4.16b , v12.16b urhadd v5.16b, v5.16b , v13.16b ld1 {v14.8b, v15.8b}, [x1], x4 //load row 4 in source 2 st1 {v0.8b, v1.8b}, [x2], x5 //load row 1 in destination urhadd v6.16b, v6.16b , v14.16b urhadd v7.16b, v7.16b , v15.16b st1 {v2.8b, v3.8b}, [x2], x5 //load row 2 in destination subs w6, w6, #4 //decrement ht by 4 st1 {v4.8b, v5.8b}, [x2], x5 //load row 3 in destination st1 {v6.8b, v7.8b}, [x2], x5 //load row 4 in destination bgt loop_8_uv //if greater than 0 repeat the loop again end_loops_uv: ldp x19, x20, [sp], #16 pop_v_regs ret