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author | Hamsalekha S <hamsalekha.s@ittiam.com> | 2015-03-13 21:24:58 +0530 |
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committer | Hamsalekha S <hamsalekha.s@ittiam.com> | 2015-04-02 15:59:02 +0530 |
commit | 8d3d303c7942ced6a987a52db8977d768dc3605f (patch) | |
tree | cc806c96794356996b13ba9970941d0aed74a97e /common/armv8/ih264_weighted_bi_pred_av8.s | |
parent | 3956d913d37327dcb340f836e604b04bd478b158 (diff) | |
download | android_external_libavc-8d3d303c7942ced6a987a52db8977d768dc3605f.tar.gz android_external_libavc-8d3d303c7942ced6a987a52db8977d768dc3605f.tar.bz2 android_external_libavc-8d3d303c7942ced6a987a52db8977d768dc3605f.zip |
Initial version
Change-Id: I7efe9a589cd24edf86e8d086b40c27cbbf8b4017
Diffstat (limited to 'common/armv8/ih264_weighted_bi_pred_av8.s')
-rwxr-xr-x | common/armv8/ih264_weighted_bi_pred_av8.s | 574 |
1 files changed, 574 insertions, 0 deletions
diff --git a/common/armv8/ih264_weighted_bi_pred_av8.s b/common/armv8/ih264_weighted_bi_pred_av8.s new file mode 100755 index 0000000..f7d0846 --- /dev/null +++ b/common/armv8/ih264_weighted_bi_pred_av8.s @@ -0,0 +1,574 @@ +//****************************************************************************** +//* +//* 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_bi_pred_av8.s +//* +//* @brief +//* Contains function definitions for weighted biprediction. +//* Functions are coded using NEON intrinsics and can be compiled using ARM RVCT +//* +//* @author +//* Kaushik Senthoor R +//* +//* @par List of Functions: +//* +//* - ih264_weighted_bi_pred_luma_av8() +//* - ih264_weighted_bi_pred_chroma_av8() +//* +//* @remarks +//* None +//* +//******************************************************************************* +//*/ +//******************************************************************************* +//* @function +//* ih264_weighted_bi_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 two ht x wd blocks, calculates the weighted samples, +//* rounds off, adds offset and stores it in the destination block. +//* +//* @param[in] puc_src1 +//* UWORD8 Pointer to the buffer containing the input block 1. +//* +//* @param[in] puc_src2 +//* UWORD8 Pointer to the buffer containing the input block 2. +//* +//* @param[out] puc_dst +//* UWORD8 pointer to the destination where the output block is stored. +//* +//* @param[in] src_strd1 +//* Stride of the input buffer 1 +//* +//* @param[in] src_strd2 +//* Stride of the input buffer 2 +//* +//* @param[in] dst_strd +//* Stride of the destination buffer +//* +//* @param[in] log_WD +//* number of bits to be rounded off +//* +//* @param[in] wt1 +//* weight for the weighted prediction +//* +//* @param[in] wt2 +//* weight for the weighted prediction +//* +//* @param[in] ofst1 +//* offset 1 used after rounding off +//* +//* @param[in] ofst2 +//* offset 2 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_bi_pred_luma_av8(UWORD8 *puc_src1, +// UWORD8 *puc_src2, +// UWORD8 *puc_dst, +// WORD32 src_strd1, +// WORD32 src_strd2, +// WORD32 dst_strd, +// UWORD16 log_WD, +// UWORD32 wt1, +// UWORD32 wt2, +// UWORD16 ofst1, +// UWORD16 ofst2, +// UWORD8 ht, +// UWORD8 wd) +// +//**************Variables Vs Registers***************************************** +// x0 => puc_src1 +// x1 => puc_src2 +// x2 => puc_dst +// x3 => src_strd1 +// [sp] => src_strd2 (x4) +// [sp+4] => dst_strd (x5) +// [sp+8] => log_WD (x6) +// [sp+12] => wt1 (x7) +// [sp+16] => wt2 (x8) +// [sp+20] => ofst1 (x9) +// [sp+24] => ofst2 (x10) +// [sp+28] => ht (x11) +// [sp+32] => wd (x12) +// +.text +.p2align 2 +.include "ih264_neon_macros.s" + + + + .global ih264_weighted_bi_pred_luma_av8 + +ih264_weighted_bi_pred_luma_av8: + + // STMFD sp!, {x4-x12,x14} //stack stores the values of the arguments + push_v_regs + stp x19, x20, [sp, #-16]! + ldr x8, [sp, #80] //Load wt2 in x8 + ldr x9, [sp, #88] //Load ofst1 in x9 + add x6, x6, #1 //x6 = log_WD + 1 + sub x20, x6, #0 //x13 = -(log_WD + 1) + neg x10, x20 + dup v0.8h, w10 //Q0 = -(log_WD + 1) (32-bit) + ldr x10, [sp, #96] //Load ofst2 in x10 + ldr x11, [sp, #104] //Load ht in x11 + ldr x12, [sp, #112] //Load wd in x12 + add x9, x9, #1 //x9 = ofst1 + 1 + add x9, x9, x10 //x9 = ofst1 + ofst2 + 1 + mov v2.s[0], w7 + mov v2.s[1], w8 //D2 = {wt1(32-bit), wt2(32-bit)} + asr x9, x9, #1 //x9 = ofst = (ofst1 + ofst2 + 1) >> 1 + dup v3.8b, w9 //D3 = ofst (8-bit) + cmp w12, #16 + beq loop_16 //branch if wd is 16 + cmp w12, #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], x3 //load row 1 in source 1 + ld1 {v4.s}[1], [x0], x3 //load row 2 in source 1 + ld1 {v6.s}[0], [x1], x4 //load row 1 in source 2 + ld1 {v6.s}[1], [x1], x4 //load row 2 in source 2 + uxtl v4.8h, v4.8b //converting rows 1,2 in source 1 to 16-bit + ld1 {v8.s}[0], [x0], x3 //load row 3 in source 1 + ld1 {v8.s}[1], [x0], x3 //load row 4 in source 1 + uxtl v6.8h, v6.8b //converting rows 1,2 in source 2 to 16-bit + ld1 {v10.s}[0], [x1], x4 //load row 3 in source 2 + ld1 {v10.s}[1], [x1], x4 //load row 4 in source 2 + uxtl v8.8h, v8.8b //converting rows 3,4 in source 1 to 16-bit + uxtl v10.8h, v10.8b //converting rows 3,4 in source 2 to 16-bit + mul v4.8h, v4.8h , v2.4h[0] //weight 1 mult. for rows 1,2 + mla v4.8h, v6.8h , v2.4h[2] //weight 2 mult. for rows 1,2 + mul v8.8h, v8.8h , v2.4h[0] //weight 1 mult. for rows 3,4 + mla v8.8h, v10.8h , v2.4h[2] //weight 2 mult. for rows 3,4 + subs w11, w11, #4 //decrement ht by 4 + srshl v4.8h, v4.8h , v0.8h //rounds off the weighted samples from rows 1,2 + srshl v8.8h, v8.8h , 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 v8.8h, v8.8h , v3.8b //adding offset for rows 3,4 + sqxtun v4.8b, v4.8h //saturating rows 1,2 to unsigned 8-bit + sqxtun v8.8b, v8.8h //saturating rows 3,4 to unsigned 8-bit + st1 {v4.s}[0], [x2], x5 //store row 1 in destination + st1 {v4.s}[1], [x2], x5 //store row 2 in destination + st1 {v8.s}[0], [x2], x5 //store row 3 in destination + st1 {v8.s}[1], [x2], x5 //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], x3 //load row 1 in source 1 + ld1 {v6.8b}, [x1], x4 //load row 1 in source 2 + ld1 {v8.8b}, [x0], x3 //load row 2 in source 1 + ld1 {v10.8b}, [x1], x4 //load row 2 in source 2 + uxtl v4.8h, v4.8b //converting row 1 in source 1 to 16-bit + ld1 {v12.8b}, [x0], x3 //load row 3 in source 1 + ld1 {v14.8b}, [x1], x4 //load row 3 in source 2 + uxtl v6.8h, v6.8b //converting row 1 in source 2 to 16-bit + ld1 {v16.8b}, [x0], x3 //load row 4 in source 1 + ld1 {v18.8b}, [x1], x4 //load row 4 in source 2 + uxtl v8.8h, v8.8b //converting row 2 in source 1 to 16-bit + uxtl v10.8h, v10.8b //converting row 2 in source 2 to 16-bit + mul v4.8h, v4.8h , v2.4h[0] //weight 1 mult. for row 1 + mla v4.8h, v6.8h , v2.4h[2] //weight 2 mult. for row 1 + uxtl v12.8h, v12.8b //converting row 3 in source 1 to 16-bit + uxtl v14.8h, v14.8b //converting row 3 in source 2 to 16-bit + mul v8.8h, v8.8h , v2.4h[0] //weight 1 mult. for row 2 + mla v8.8h, v10.8h , v2.4h[2] //weight 2 mult. for row 2 + uxtl v16.8h, v16.8b //converting row 4 in source 1 to 16-bit + uxtl v18.8h, v18.8b //converting row 4 in source 2 to 16-bit + mul v12.8h, v12.8h , v2.4h[0] //weight 1 mult. for row 3 + mla v12.8h, v14.8h , v2.4h[2] //weight 2 mult. for row 3 + mul v16.8h, v16.8h , v2.4h[0] //weight 1 mult. for row 4 + mla v16.8h, v18.8h , v2.4h[2] //weight 2 mult. for row 4 + srshl v4.8h, v4.8h , 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 + srshl v12.8h, v12.8h , v0.8h //rounds off the weighted samples from row 3 + saddw v4.8h, v4.8h , v3.8b //adding offset for row 1 + srshl v16.8h, v16.8h , v0.8h //rounds off the weighted samples from row 4 + saddw v8.8h, v8.8h , v3.8b //adding offset for row 2 + saddw v12.8h, v12.8h , v3.8b //adding offset for row 3 + sqxtun v4.8b, v4.8h //saturating row 1 to unsigned 8-bit + saddw v16.8h, v16.8h , v3.8b //adding offset for row 4 + sqxtun v8.8b, v8.8h //saturating row 2 to unsigned 8-bit + sqxtun v12.8b, v12.8h //saturating row 3 to unsigned 8-bit + sqxtun v16.8b, v16.8h //saturating row 4 to unsigned 8-bit + st1 {v4.8b}, [x2], x5 //store row 1 in destination + st1 {v8.8b}, [x2], x5 //store row 2 in destination + subs w11, w11, #4 //decrement ht by 4 + st1 {v12.8b}, [x2], x5 //store row 3 in destination + st1 {v16.8b}, [x2], x5 //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], x3 //load row 1 in source 1 + ld1 {v6.8b, v7.8b}, [x1], x4 //load row 1 in source 2 + ld1 {v8.8b, v9.8b}, [x0], x3 //load row 2 in source 1 + ld1 {v10.8b, v11.8b}, [x1], x4 //load row 2 in source 2 + uxtl v20.8h, v4.8b //converting row 1L in source 1 to 16-bit + ld1 {v12.8b, v13.8b}, [x0], x3 //load row 3 in source 1 + ld1 {v14.8b, v15.8b}, [x1], x4 //load row 3 in source 2 + uxtl v22.8h, v6.8b //converting row 1L in source 2 to 16-bit + ld1 {v16.8b, v17.8b}, [x0], x3 //load row 4 in source 1 + ld1 {v18.8b, v19.8b}, [x1], x4 //load row 4 in source 2 + uxtl v4.8h, v5.8b //converting row 1H in source 1 to 16-bit + uxtl v6.8h, v7.8b //converting row 1H in source 2 to 16-bit + mul v20.8h, v20.8h , v2.4h[0] //weight 1 mult. for row 1L + mla v20.8h, v22.8h , v2.4h[2] //weight 2 mult. for row 1L + uxtl v24.8h, v8.8b //converting row 2L in source 1 to 16-bit + uxtl v26.8h, v10.8b //converting row 2L in source 2 to 16-bit + mul v4.8h, v4.8h , v2.4h[0] //weight 1 mult. for row 1H + mla v4.8h, v6.8h , v2.4h[2] //weight 2 mult. for row 1H + uxtl v8.8h, v9.8b //converting row 2H in source 1 to 16-bit + uxtl v10.8h, v11.8b //converting row 2H in source 2 to 16-bit + mul v24.8h, v24.8h , v2.4h[0] //weight 1 mult. for row 2L + mla v24.8h, v26.8h , v2.4h[2] //weight 2 mult. for row 2L + uxtl v28.8h, v12.8b //converting row 3L in source 1 to 16-bit + uxtl v30.8h, v14.8b //converting row 3L in source 2 to 16-bit + mul v8.8h, v8.8h , v2.4h[0] //weight 1 mult. for row 2H + mla v8.8h, v10.8h , v2.4h[2] //weight 2 mult. for row 2H + uxtl v12.8h, v13.8b //converting row 3H in source 1 to 16-bit + uxtl v14.8h, v15.8b //converting row 3H in source 2 to 16-bit + mul v28.8h, v28.8h , v2.4h[0] //weight 1 mult. for row 3L + mla v28.8h, v30.8h , v2.4h[2] //weight 2 mult. for row 3L + uxtl v22.8h, v16.8b //converting row 4L in source 1 to 16-bit + uxtl v6.8h, v18.8b //converting row 4L in source 2 to 16-bit + mul v12.8h, v12.8h , v2.4h[0] //weight 1 mult. for row 3H + mla v12.8h, v14.8h , v2.4h[2] //weight 2 mult. for row 3H + uxtl v16.8h, v17.8b //converting row 4H in source 1 to 16-bit + uxtl v18.8h, v19.8b //converting row 4H in source 2 to 16-bit + mul v22.8h, v22.8h , v2.4h[0] //weight 1 mult. for row 4L + mla v22.8h, v6.8h , v2.4h[2] //weight 2 mult. for row 4L + srshl v20.8h, v20.8h , v0.8h //rounds off the weighted samples from row 1L + mul v16.8h, v16.8h , v2.4h[0] //weight 1 mult. for row 4H + mla v16.8h, v18.8h , v2.4h[2] //weight 2 mult. for row 4H + srshl v4.8h, v4.8h , v0.8h //rounds off the weighted samples from row 1H + srshl v24.8h, v24.8h , v0.8h //rounds off the weighted samples from row 2L + saddw v20.8h, v20.8h , v3.8b //adding offset for row 1L + srshl v8.8h, v8.8h , v0.8h //rounds off the weighted samples from row 2H + saddw v4.8h, v4.8h , v3.8b //adding offset for row 1H + srshl v28.8h, v28.8h , v0.8h //rounds off the weighted samples from row 3L + saddw v24.8h, v24.8h , v3.8b //adding offset for row 2L + srshl v12.8h, v12.8h , v0.8h //rounds off the weighted samples from row 3H + saddw v8.8h, v8.8h , v3.8b //adding offset for row 2H + srshl v22.8h, v22.8h , v0.8h //rounds off the weighted samples from row 4L + saddw v28.8h, v28.8h , v3.8b //adding offset for row 3L + srshl v16.8h, v16.8h , v0.8h //rounds off the weighted samples from row 4H + saddw v12.8h, v12.8h , v3.8b //adding offset for row 3H + sqxtun v26.8b, v20.8h //saturating row 1L to unsigned 8-bit + saddw v22.8h, v22.8h , v3.8b //adding offset for row 4L + sqxtun v27.8b, v4.8h //saturating row 1H to unsigned 8-bit + saddw v16.8h, v16.8h , v3.8b //adding offset for row 4H + sqxtun v10.8b, v24.8h //saturating row 2L to unsigned 8-bit + sqxtun v11.8b, v8.8h //saturating row 2H to unsigned 8-bit + sqxtun v30.8b, v28.8h //saturating row 3L to unsigned 8-bit + sqxtun v31.8b, v12.8h //saturating row 3H to unsigned 8-bit + st1 {v26.8b, v27.8b}, [x2], x5 //store row 1 in destination + sqxtun v14.8b, v22.8h //saturating row 4L to unsigned 8-bit + sqxtun v15.8b, v16.8h //saturating row 4H to unsigned 8-bit + st1 {v10.8b, v11.8b}, [x2], x5 //store row 2 in destination + subs w11, w11, #4 //decrement ht by 4 + st1 {v30.8b, v31.8b}, [x2], x5 //store row 3 in destination + st1 {v14.8b, v15.8b}, [x2], x5 //store row 4 in destination + bgt loop_16 //if greater than 0 repeat the loop again + +end_loops: + + // LDMFD sp!,{x4-x12,x15} //Reload the registers from sp + ldp x19, x20, [sp], #16 + pop_v_regs + ret + + +//******************************************************************************* +//* @function +//* ih264_weighted_bi_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 two ht x wd blocks, calculates the weighted samples, +//* rounds off, adds offset and stores it in the destination block for U and V. +//* +//* @param[in] puc_src1 +//* UWORD8 Pointer to the buffer containing the input block 1. +//* +//* @param[in] puc_src2 +//* UWORD8 Pointer to the buffer containing the input block 2. +//* +//* @param[out] puc_dst +//* UWORD8 pointer to the destination where the output block is stored. +//* +//* @param[in] src_strd1 +//* Stride of the input buffer 1 +//* +//* @param[in] src_strd2 +//* Stride of the input buffer 2 +//* +//* @param[in] dst_strd +//* Stride of the destination buffer +//* +//* @param[in] log_WD +//* number of bits to be rounded off +//* +//* @param[in] wt1 +//* weights for the weighted prediction in U and V +//* +//* @param[in] wt2 +//* weights for the weighted prediction in U and V +//* +//* @param[in] ofst1 +//* offset 1 used after rounding off for U an dV +//* +//* @param[in] ofst2 +//* offset 2 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_bi_pred_chroma_av8(UWORD8 *puc_src1, +// UWORD8 *puc_src2, +// UWORD8 *puc_dst, +// WORD32 src_strd1, +// WORD32 src_strd2, +// WORD32 dst_strd, +// UWORD16 log_WD, +// UWORD32 wt1, +// UWORD32 wt2, +// UWORD16 ofst1, +// UWORD16 ofst2, +// UWORD8 ht, +// UWORD8 wd) +// +//**************Variables Vs Registers***************************************** +// x0 => puc_src1 +// x1 => puc_src2 +// x2 => puc_dst +// x3 => src_strd1 +// [sp] => src_strd2 (x4) +// [sp+4] => dst_strd (x5) +// [sp+8] => log_WD (x6) +// [sp+12] => wt1 (x7) +// [sp+16] => wt2 (x8) +// [sp+20] => ofst1 (x9) +// [sp+24] => ofst2 (x10) +// [sp+28] => ht (x11) +// [sp+32] => wd (x12) +// + + + + + + .global ih264_weighted_bi_pred_chroma_av8 + +ih264_weighted_bi_pred_chroma_av8: + + // STMFD sp!, {x4-x12,x14} //stack stores the values of the arguments + push_v_regs + stp x19, x20, [sp, #-16]! + + + ldr x8, [sp, #80] //Load wt2 in x8 + dup v4.4s, w8 //Q2 = (wt2_u, wt2_v) (32-bit) + dup v2.4s, w7 //Q1 = (wt1_u, wt1_v) (32-bit) + add x6, x6, #1 //x6 = log_WD + 1 + ldr w9, [sp, #88] //Load ofst1 in x9 + sxtw x9, w9 + ldr w10, [sp, #96] //Load ofst2 in x10 + sxtw x10, w10 + sub x20, x6, #0 //x12 = -(log_WD + 1) + neg x20, x20 + dup v0.8h, w20 //Q0 = -(log_WD + 1) (16-bit) + ldr w11, [sp, #104] //Load ht in x11 + ldr w12, [sp, #112] //Load wd in x12 + sxtw x11, w11 + sxtw x12, w12 + dup v20.8h, w9 //0ffset1 + dup v21.8h, w10 //0ffset2 + srhadd v6.8b, v20.8b, v21.8b + sxtl v6.8h, v6.8b + cmp w12, #8 //check if wd is 8 + beq loop_8_uv //branch if wd is 8 + cmp w12, #4 //check if wd is 4 + beq loop_4_uv //branch if wd is 4 + +loop_2_uv: //each iteration processes two rows + + ld1 {v8.s}[0], [x0], x3 //load row 1 in source 1 + ld1 {v8.s}[1], [x0], x3 //load row 2 in source 1 + ld1 {v10.s}[0], [x1], x4 //load row 1 in source 2 + ld1 {v10.s}[1], [x1], x4 //load row 2 in source 2 + uxtl v8.8h, v8.8b //converting rows 1,2 in source 1 to 16-bit + uxtl v10.8h, v10.8b //converting rows 1,2 in source 2 to 16-bit + mul v8.8h, v8.8h , v2.8h //weight 1 mult. for rows 1,2 + mla v8.8h, v10.8h , v4.8h //weight 2 mult. for rows 1,2 + srshl v8.8h, v8.8h , v0.8h //rounds off the weighted samples from rows 1,2 + add v8.8h, v8.8h , v6.8h //adding offset for rows 1,2 + sqxtun v8.8b, v8.8h //saturating rows 1,2 to unsigned 8-bit/ + st1 {v8.s}[0], [x2], x5 //store row 1 in destination + st1 {v8.s}[1], [x2], x5 //store row 2 in destination + subs w11, w11, #2 //decrement ht by 2 + 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 {v8.8b}, [x0], x3 //load row 1 in source 1 + ld1 {v10.8b}, [x1], x4 //load row 1 in source 2 + uxtl v8.8h, v8.8b //converting row 1 in source 1 to 16-bit + ld1 {v12.8b}, [x0], x3 //load row 2 in source 1 + uxtl v10.8h, v10.8b //converting row 1 in source 2 to 16-bit + ld1 {v14.8b}, [x1], x4 //load row 2 in source 2 + uxtl v12.8h, v12.8b //converting row 2 in source 1 to 16-bit + mul v8.8h, v8.8h , v2.8h //weight 1 mult. for row 1 + mla v8.8h, v10.8h , v4.8h //weight 2 mult. for row 1 + uxtl v14.8h, v14.8b //converting row 2 in source 2 to 16-bit + mul v12.8h, v12.8h , v2.8h //weight 1 mult. for row 2 + mla v12.8h, v14.8h , v4.8h //weight 2 mult. for row 2 + subs w11, w11, #2 //decrement ht by 2 + srshl v8.8h, v8.8h , v0.8h //rounds off the weighted samples from row 1 + srshl v12.8h, v12.8h , v0.8h //rounds off the weighted samples from row 2 + add v8.8h, v8.8h , v6.8h //adding offset for row 1 + add v12.8h, v12.8h , v6.8h //adding offset for row 2 + sqxtun v8.8b, v8.8h //saturating row 1 to unsigned 8-bit + sqxtun v12.8b, v12.8h //saturating row 2 to unsigned 8-bit + st1 {v8.8b}, [x2], x5 //store row 1 in destination + st1 {v12.8b}, [x2], x5 //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 {v8.8b, v9.8b}, [x0], x3 //load row 1 in source 1 + ld1 {v10.8b, v11.8b}, [x1], x4 //load row 1 in source 2 + ld1 {v12.8b, v13.8b}, [x0], x3 //load row 2 in source 1 + ld1 {v14.8b, v15.8b}, [x1], x4 //load row 2 in source 2 + uxtl v24.8h, v8.8b //converting row 1L in source 1 to 16-bit + ld1 {v16.8b, v17.8b}, [x0], x3 //load row 3 in source 1 + ld1 {v18.8b, v19.8b}, [x1], x4 //load row 3 in source 2 + uxtl v26.8h, v10.8b //converting row 1L in source 2 to 16-bit + ld1 {v20.8b, v21.8b}, [x0], x3 //load row 4 in source 1 + ld1 {v22.8b, v23.8b}, [x1], x4 //load row 4 in source 2 + uxtl v8.8h, v9.8b //converting row 1H in source 1 to 16-bit + uxtl v10.8h, v11.8b //converting row 1H in source 2 to 16-bit + mul v24.8h, v24.8h , v2.8h //weight 1 mult. for row 1L + mla v24.8h, v26.8h , v4.8h //weight 2 mult. for row 1L + uxtl v28.8h, v12.8b //converting row 2L in source 1 to 16-bit + uxtl v30.8h, v14.8b //converting row 2L in source 2 to 16-bit + mul v8.8h, v8.8h , v2.8h //weight 1 mult. for row 1H + mla v8.8h, v10.8h , v4.8h //weight 2 mult. for row 1H + uxtl v12.8h, v13.8b //converting row 2H in source 1 to 16-bit + uxtl v14.8h, v15.8b //converting row 2H in source 2 to 16-bit + mul v28.8h, v28.8h , v2.8h //weight 1 mult. for row 2L + mla v28.8h, v30.8h , v4.8h //weight 2 mult. for row 2L + uxtl v26.8h, v16.8b //converting row 3L in source 1 to 16-bit + uxtl v10.8h, v18.8b //converting row 3L in source 2 to 16-bit + mul v12.8h, v12.8h , v2.8h //weight 1 mult. for row 2H + mla v12.8h, v14.8h , v4.8h //weight 2 mult. for row 2H + uxtl v16.8h, v17.8b //converting row 3H in source 1 to 16-bit + uxtl v18.8h, v19.8b //converting row 3H in source 2 to 16-bit + mul v26.8h, v26.8h , v2.8h //weight 1 mult. for row 3L + mla v26.8h, v10.8h , v4.8h //weight 2 mult. for row 3L + uxtl v30.8h, v20.8b //converting row 4L in source 1 to 16-bit + uxtl v14.8h, v22.8b //converting row 4L in source 2 to 16-bit + mul v16.8h, v16.8h , v2.8h //weight 1 mult. for row 3H + mla v16.8h, v18.8h , v4.8h //weight 2 mult. for row 3H + uxtl v20.8h, v21.8b //converting row 4H in source 1 to 16-bit + uxtl v22.8h, v23.8b //converting row 4H in source 2 to 16-bit + mul v30.8h, v30.8h , v2.8h //weight 1 mult. for row 4L + mla v30.8h, v14.8h , v4.8h //weight 2 mult. for row 4L + srshl v24.8h, v24.8h , v0.8h //rounds off the weighted samples from row 1L + mul v20.8h, v20.8h , v2.8h //weight 1 mult. for row 4H + mla v20.8h, v22.8h , v4.8h //weight 2 mult. for row 4H + srshl v8.8h, v8.8h , v0.8h //rounds off the weighted samples from row 1H + srshl v28.8h, v28.8h , v0.8h //rounds off the weighted samples from row 2L + add v24.8h, v24.8h , v6.8h //adding offset for row 1L + srshl v12.8h, v12.8h , v0.8h //rounds off the weighted samples from row 2H + add v8.8h, v8.8h , v6.8h //adding offset for row 1H + srshl v26.8h, v26.8h , v0.8h //rounds off the weighted samples from row 3L + add v28.8h, v28.8h , v6.8h //adding offset for row 2L + srshl v16.8h, v16.8h , v0.8h //rounds off the weighted samples from row 3H + add v12.8h, v12.8h , v6.8h //adding offset for row 2H + srshl v30.8h, v30.8h , v0.8h //rounds off the weighted samples from row 4L + add v26.8h, v26.8h , v6.8h //adding offset for row 3L + srshl v20.8h, v20.8h , v0.8h //rounds off the weighted samples from row 4H + add v16.8h, v16.8h , v6.8h //adding offset for row 3H + sqxtun v10.8b, v24.8h //saturating row 1L to unsigned 8-bit + add v30.8h, v30.8h , v6.8h //adding offset for row 4L + sqxtun v11.8b, v8.8h //saturating row 1H to unsigned 8-bit + add v20.8h, v20.8h , v6.8h //adding offset for row 4H + sqxtun v18.8b, v28.8h //saturating row 2L to unsigned 8-bit + sqxtun v19.8b, v12.8h //saturating row 2H to unsigned 8-bit + sqxtun v14.8b, v26.8h //saturating row 3L to unsigned 8-bit + sqxtun v15.8b, v16.8h //saturating row 3H to unsigned 8-bit + st1 {v10.8b, v11.8b}, [x2], x5 //store row 1 in destination + sqxtun v22.8b, v30.8h //saturating row 4L to unsigned 8-bit + sqxtun v23.8b, v20.8h //saturating row 4H to unsigned 8-bit + st1 {v18.8b, v19.8b}, [x2], x5 //store row 2 in destination + subs w11, w11, #4 //decrement ht by 4 + st1 {v14.8b, v15.8b}, [x2], x5 //store row 3 in destination + st1 {v22.8b, v23.8b}, [x2], x5 //store row 4 in destination + bgt loop_8_uv //if greater than 0 repeat the loop again + +end_loops_uv: + + // LDMFD sp!,{x4-x12,x15} //Reload the registers from sp + ldp x19, x20, [sp], #16 + pop_v_regs + ret + + + |