//****************************************************************************** //* //* 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_weighted_pred_av8.s //* //* @brief //* Contains function definitions for weighted prediction. //* //* @author //* Kaushik Senthoor R //* //* @par List of Functions: //* //* - ih264_weighted_pred_luma_av8() //* - ih264_weighted_pred_chroma_av8() //* //* @remarks //* None //* //******************************************************************************* //*/ //******************************************************************************* //* @function //* ih264_weighted_pred_luma_av8() //* //* @brief //* This routine performs the default weighted prediction as described in sec //* 8.4.2.3.2 titled "Weighted sample prediction process" for luma. //* //* @par Description: //* This function gets a ht x wd block, calculates the weighted sample, rounds //* off, adds offset and stores it in the destination block. //* //* @param[in] puc_src: //* UWORD8 Pointer to the buffer containing the input block. //* //* @param[out] puc_dst //* UWORD8 pointer to the destination where the output block is stored. //* //* @param[in] src_strd //* Stride of the input buffer //* //* @param[in] dst_strd //* Stride of the destination buffer //* //* @param[in] log_WD //* number of bits to be rounded off //* //* @param[in] wt //* weight for the weighted prediction //* //* @param[in] ofst //* offset used after rounding off //* //* @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_weighted_pred_luma_av8(UWORD8 *puc_src, // UWORD8 *puc_dst, // WORD32 src_strd, // WORD32 dst_strd, // UWORD8 log_WD, // UWORD32 wt, // UWORD16 ofst, // UWORD8 ht, // UWORD8 wd) // //**************Variables Vs Registers***************************************** // x0 => puc_src // x1 => puc_dst // x2 => src_strd // x3 => dst_strd // [sp] => log_WD (x4) // [sp+4] => wt (x5) // [sp+8] => ofst (x6) // [sp+12] => ht (x7) // [sp+16] => wd (x8) // .text .p2align 2 .include "ih264_neon_macros.s" .global ih264_weighted_pred_luma_av8 ih264_weighted_pred_luma_av8: // STMFD sp!, {x4-x9,x14} //stack stores the values of the arguments push_v_regs stp x19, x20, [sp, #-16]! ldr w8, [sp, #80] //Load wd sxtw x8, w8 dup v2.4h, w5 //D2 = wt (16-bit) sub x20, x4, #0 //x9 = -log_WD neg x9, x20 dup v3.8b, w6 //D3 = ofst (8-bit) cmp w8, #16 //check if wd is 16 dup v0.8h, w9 //Q0 = -log_WD (16-bit) beq loop_16 //branch if wd is 16 cmp w8, #8 //check if wd is 8 beq loop_8 //branch if wd is 8 loop_4: //each iteration processes four rows ld1 {v4.s}[0], [x0], x2 //load row 1 in source ld1 {v4.s}[1], [x0], x2 //load row 2 in source ld1 {v6.s}[0], [x0], x2 //load row 3 in source ld1 {v6.s}[1], [x0], x2 //load row 4 in source uxtl v4.8h, v4.8b //converting rows 1,2 to 16-bit uxtl v6.8h, v6.8b //converting rows 3,4 to 16-bit mul v4.8h, v4.8h , v2.4h[0] //weight mult. for rows 1,2 mul v6.8h, v6.8h , v2.4h[0] //weight mult. for rows 3,4 subs w7, w7, #4 //decrement ht by 4 srshl v4.8h, v4.8h , v0.8h //rounds off the weighted samples from rows 1,2 srshl v6.8h, v6.8h , v0.8h //rounds off the weighted samples from rows 3,4 saddw v4.8h, v4.8h , v3.8b //adding offset for rows 1,2 saddw v6.8h, v6.8h , v3.8b //adding offset for rows 3,4 sqxtun v4.8b, v4.8h //saturating rows 1,2 to unsigned 8-bit sqxtun v6.8b, v6.8h //saturating rows 3,4 to unsigned 8-bit st1 {v4.s}[0], [x1], x3 //store row 1 in destination st1 {v4.s}[1], [x1], x3 //store row 2 in destination st1 {v6.s}[0], [x1], x3 //store row 3 in destination st1 {v6.s}[1], [x1], x3 //store 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 {v4.8b}, [x0], x2 //load row 1 in source ld1 {v6.8b}, [x0], x2 //load row 2 in source ld1 {v8.8b}, [x0], x2 //load row 3 in source uxtl v4.8h, v4.8b //converting row 1 to 16-bit ld1 {v10.8b}, [x0], x2 //load row 4 in source uxtl v6.8h, v6.8b //converting row 2 to 16-bit uxtl v8.8h, v8.8b //converting row 3 to 16-bit mul v4.8h, v4.8h , v2.4h[0] //weight mult. for row 1 uxtl v10.8h, v10.8b //converting row 4 to 16-bit mul v6.8h, v6.8h , v2.4h[0] //weight mult. for row 2 mul v8.8h, v8.8h , v2.4h[0] //weight mult. for row 3 mul v10.8h, v10.8h , v2.4h[0] //weight mult. for row 4 srshl v4.8h, v4.8h , v0.8h //rounds off the weighted samples from row 1 srshl v6.8h, v6.8h , v0.8h //rounds off the weighted samples from row 2 srshl v8.8h, v8.8h , v0.8h //rounds off the weighted samples from row 3 saddw v4.8h, v4.8h , v3.8b //adding offset for row 1 srshl v10.8h, v10.8h , v0.8h //rounds off the weighted samples from row 4 saddw v6.8h, v6.8h , v3.8b //adding offset for row 2 saddw v8.8h, v8.8h , v3.8b //adding offset for row 3 sqxtun v4.8b, v4.8h //saturating row 1 to unsigned 8-bit saddw v10.8h, v10.8h , v3.8b //adding offset for row 4 sqxtun v6.8b, v6.8h //saturating row 2 to unsigned 8-bit sqxtun v8.8b, v8.8h //saturating row 3 to unsigned 8-bit sqxtun v10.8b, v10.8h //saturating row 4 to unsigned 8-bit st1 {v4.8b}, [x1], x3 //store row 1 in destination st1 {v6.8b}, [x1], x3 //store row 2 in destination subs w7, w7, #4 //decrement ht by 4 st1 {v8.8b}, [x1], x3 //store row 3 in destination st1 {v10.8b}, [x1], x3 //store row 4 in destination bgt loop_8 //if greater than 0 repeat the loop again b end_loops loop_16: //each iteration processes two rows ld1 {v4.8b, v5.8b}, [x0], x2 //load row 1 in source ld1 {v6.8b, v7.8b}, [x0], x2 //load row 2 in source uxtl v12.8h, v4.8b //converting row 1L to 16-bit ld1 {v8.8b, v9.8b}, [x0], x2 //load row 3 in source uxtl v14.8h, v5.8b //converting row 1H to 16-bit ld1 {v10.8b, v11.8b}, [x0], x2 //load row 4 in source uxtl v16.8h, v6.8b //converting row 2L to 16-bit mul v12.8h, v12.8h , v2.4h[0] //weight mult. for row 1L uxtl v18.8h, v7.8b //converting row 2H to 16-bit mul v14.8h, v14.8h , v2.4h[0] //weight mult. for row 1H uxtl v20.8h, v8.8b //converting row 3L to 16-bit mul v16.8h, v16.8h , v2.4h[0] //weight mult. for row 2L uxtl v22.8h, v9.8b //converting row 3H to 16-bit mul v18.8h, v18.8h , v2.4h[0] //weight mult. for row 2H uxtl v24.8h, v10.8b //converting row 4L to 16-bit mul v20.8h, v20.8h , v2.4h[0] //weight mult. for row 3L uxtl v26.8h, v11.8b //converting row 4H to 16-bit mul v22.8h, v22.8h , v2.4h[0] //weight mult. for row 3H mul v24.8h, v24.8h , v2.4h[0] //weight mult. for row 4L srshl v12.8h, v12.8h , v0.8h //rounds off the weighted samples from row 1L mul v26.8h, v26.8h , v2.4h[0] //weight mult. for row 4H srshl v14.8h, v14.8h , v0.8h //rounds off the weighted samples from row 1H srshl v16.8h, v16.8h , v0.8h //rounds off the weighted samples from row 2L saddw v12.8h, v12.8h , v3.8b //adding offset for row 1L srshl v18.8h, v18.8h , v0.8h //rounds off the weighted samples from row 2H saddw v14.8h, v14.8h , v3.8b //adding offset for row 1H sqxtun v4.8b, v12.8h //saturating row 1L to unsigned 8-bit srshl v20.8h, v20.8h , v0.8h //rounds off the weighted samples from row 3L saddw v16.8h, v16.8h , v3.8b //adding offset for row 2L sqxtun v5.8b, v14.8h //saturating row 1H to unsigned 8-bit srshl v22.8h, v22.8h , v0.8h //rounds off the weighted samples from row 3H saddw v18.8h, v18.8h , v3.8b //adding offset for row 2H sqxtun v6.8b, v16.8h //saturating row 2L to unsigned 8-bit srshl v24.8h, v24.8h , v0.8h //rounds off the weighted samples from row 4L saddw v20.8h, v20.8h , v3.8b //adding offset for row 3L sqxtun v7.8b, v18.8h //saturating row 2H to unsigned 8-bit srshl v26.8h, v26.8h , v0.8h //rounds off the weighted samples from row 4H saddw v22.8h, v22.8h , v3.8b //adding offset for row 3H sqxtun v8.8b, v20.8h //saturating row 3L to unsigned 8-bit saddw v24.8h, v24.8h , v3.8b //adding offset for row 4L sqxtun v9.8b, v22.8h //saturating row 3H to unsigned 8-bit saddw v26.8h, v26.8h , v3.8b //adding offset for row 4H sqxtun v10.8b, v24.8h //saturating row 4L to unsigned 8-bit st1 {v4.8b, v5.8b}, [x1], x3 //store row 1 in destination sqxtun v11.8b, v26.8h //saturating row 4H to unsigned 8-bit st1 {v6.8b, v7.8b}, [x1], x3 //store row 2 in destination subs w7, w7, #4 //decrement ht by 4 st1 {v8.8b, v9.8b}, [x1], x3 //store row 3 in destination st1 {v10.8b, v11.8b}, [x1], x3 //store row 4 in destination bgt loop_16 //if greater than 0 repeat the loop again end_loops: // LDMFD sp!,{x4-x9,x15} //Reload the registers from sp ldp x19, x20, [sp], #16 pop_v_regs ret //******************************************************************************* //* @function //* ih264_weighted_pred_chroma_av8() //* //* @brief //* This routine performs the default weighted prediction as described in sec //* 8.4.2.3.2 titled "Weighted sample prediction process" for chroma. //* //* @par Description: //* This function gets a ht x wd block, calculates the weighted sample, rounds //* off, adds offset and stores it in the destination block for U and V. //* //* @param[in] puc_src: //* UWORD8 Pointer to the buffer containing the input block. //* //* @param[out] puc_dst //* UWORD8 pointer to the destination where the output block is stored. //* //* @param[in] src_strd //* Stride of the input buffer //* //* @param[in] dst_strd //* Stride of the destination buffer //* //* @param[in] log_WD //* number of bits to be rounded off //* //* @param[in] wt //* weights for the weighted prediction for U and V //* //* @param[in] ofst //* offsets used after rounding off for U and V //* //* @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_weighted_pred_chroma_av8(UWORD8 *puc_src, // UWORD8 *puc_dst, // WORD32 src_strd, // WORD32 dst_strd, // UWORD8 log_WD, // UWORD32 wt, // UWORD16 ofst, // UWORD8 ht, // UWORD8 wd) // //**************Variables Vs Registers***************************************** // x0 => puc_src // x1 => puc_dst // x2 => src_strd // x3 => dst_strd // [sp] => log_WD (x4) // [sp+4] => wt (x5) // [sp+8] => ofst (x6) // [sp+12] => ht (x7) // [sp+16] => wd (x8) // .global ih264_weighted_pred_chroma_av8 ih264_weighted_pred_chroma_av8: // STMFD sp!, {x4-x9,x14} //stack stores the values of the arguments push_v_regs stp x19, x20, [sp, #-16]! ldr w8, [sp, #80] //Load wd sxtw x8, w8 sub x20, x4, #0 //x9 = -log_WD neg x9, x20 dup v2.4s, w5 //Q1 = {wt_u (16-bit), wt_v (16-bit)} dup v4.4h, w6 //D4 = {ofst_u (8-bit), ofst_v (8-bit)} cmp w8, #8 //check if wd is 8 dup v0.8h, w9 //Q0 = -log_WD (16-bit) beq loop_8_uv //branch if wd is 8 cmp w8, #4 //check if ws is 4 beq loop_4_uv //branch if wd is 4 loop_2_uv: //each iteration processes two rows ld1 {v6.s}[0], [x0], x2 //load row 1 in source ld1 {v6.s}[1], [x0], x2 //load row 2 in source uxtl v6.8h, v6.8b //converting rows 1,2 to 16-bit mul v6.8h, v6.8h , v2.8h //weight mult. for rows 1,2 srshl v6.8h, v6.8h , v0.8h //rounds off the weighted samples from rows 1,2 saddw v6.8h, v6.8h , v4.8b //adding offset for rows 1,2 sqxtun v6.8b, v6.8h //saturating rows 1,2 to unsigned 8-bit subs w7, w7, #2 //decrement ht by 2 st1 {v6.s}[0], [x1], x3 //store row 1 in destination st1 {v6.s}[1], [x1], x3 //store 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 {v6.8b}, [x0], x2 //load row 1 in source ld1 {v8.8b}, [x0], x2 //load row 2 in source uxtl v6.8h, v6.8b //converting row 1 to 16-bit uxtl v8.8h, v8.8b //converting row 2 to 16-bit mul v6.8h, v6.8h , v2.8h //weight mult. for row 1 mul v8.8h, v8.8h , v2.8h //weight mult. for row 2 subs w7, w7, #2 //decrement ht by 2 srshl v6.8h, v6.8h , v0.8h //rounds off the weighted samples from row 1 srshl v8.8h, v8.8h , v0.8h //rounds off the weighted samples from row 2 saddw v6.8h, v6.8h , v4.8b //adding offset for row 1 saddw v8.8h, v8.8h , v4.8b //adding offset for row 2 sqxtun v6.8b, v6.8h //saturating row 1 to unsigned 8-bit sqxtun v8.8b, v8.8h //saturating row 2 to unsigned 8-bit st1 {v6.8b}, [x1], x3 //store row 1 in destination st1 {v8.8b}, [x1], x3 //store 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 two rows ld1 {v6.8b, v7.8b}, [x0], x2 //load row 1 in source ld1 {v8.8b, v9.8b}, [x0], x2 //load row 2 in source uxtl v14.8h, v6.8b //converting row 1L to 16-bit ld1 {v10.8b, v11.8b}, [x0], x2 //load row 3 in source uxtl v16.8h, v7.8b //converting row 1H to 16-bit ld1 {v12.8b, v13.8b}, [x0], x2 //load row 4 in source mul v14.8h, v14.8h , v2.8h //weight mult. for row 1L uxtl v18.8h, v8.8b //converting row 2L to 16-bit mul v16.8h, v16.8h , v2.8h //weight mult. for row 1H uxtl v20.8h, v9.8b //converting row 2H to 16-bit mul v18.8h, v18.8h , v2.8h //weight mult. for row 2L uxtl v22.8h, v10.8b //converting row 3L to 16-bit mul v20.8h, v20.8h , v2.8h //weight mult. for row 2H uxtl v24.8h, v11.8b //converting row 3H to 16-bit mul v22.8h, v22.8h , v2.8h //weight mult. for row 3L uxtl v26.8h, v12.8b //converting row 4L to 16-bit mul v24.8h, v24.8h , v2.8h //weight mult. for row 3H uxtl v28.8h, v13.8b //converting row 4H to 16-bit mul v26.8h, v26.8h , v2.8h //weight mult. for row 4L srshl v14.8h, v14.8h , v0.8h //rounds off the weighted samples from row 1L mul v28.8h, v28.8h , v2.8h //weight mult. for row 4H srshl v16.8h, v16.8h , v0.8h //rounds off the weighted samples from row 1H srshl v18.8h, v18.8h , v0.8h //rounds off the weighted samples from row 2L saddw v14.8h, v14.8h , v4.8b //adding offset for row 1L srshl v20.8h, v20.8h , v0.8h //rounds off the weighted samples from row 2H saddw v16.8h, v16.8h , v4.8b //adding offset for row 1H sqxtun v6.8b, v14.8h //saturating row 1L to unsigned 8-bit srshl v22.8h, v22.8h , v0.8h //rounds off the weighted samples from row 3L saddw v18.8h, v18.8h , v4.8b //adding offset for row 2L sqxtun v7.8b, v16.8h //saturating row 1H to unsigned 8-bit srshl v24.8h, v24.8h , v0.8h //rounds off the weighted samples from row 3H saddw v20.8h, v20.8h , v4.8b //adding offset for row 2H sqxtun v8.8b, v18.8h //saturating row 2L to unsigned 8-bit srshl v26.8h, v26.8h , v0.8h //rounds off the weighted samples from row 4L saddw v22.8h, v22.8h , v4.8b //adding offset for row 3L sqxtun v9.8b, v20.8h //saturating row 2H to unsigned 8-bit srshl v28.8h, v28.8h , v0.8h //rounds off the weighted samples from row 4H saddw v24.8h, v24.8h , v4.8b //adding offset for row 3H sqxtun v10.8b, v22.8h //saturating row 3L to unsigned 8-bit saddw v26.8h, v26.8h , v4.8b //adding offset for row 4L sqxtun v11.8b, v24.8h //saturating row 3H to unsigned 8-bit saddw v28.8h, v28.8h , v4.8b //adding offset for row 4H sqxtun v12.8b, v26.8h //saturating row 4L to unsigned 8-bit st1 {v6.8b, v7.8b}, [x1], x3 //store row 1 in destination sqxtun v13.8b, v28.8h //saturating row 4H to unsigned 8-bit st1 {v8.8b, v9.8b}, [x1], x3 //store row 2 in destination subs w7, w7, #4 //decrement ht by 4 st1 {v10.8b, v11.8b}, [x1], x3 //store row 3 in destination st1 {v12.8b, v13.8b}, [x1], x3 //store row 4 in destination bgt loop_8_uv //if greater than 0 repeat the loop again end_loops_uv: // LDMFD sp!,{x4-x9,x15} //Reload the registers from sp ldp x19, x20, [sp], #16 pop_v_regs ret