@/****************************************************************************** @ * @ * 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_inter_pred_luma_horz_qpel_a9q.s @* @* @brief @* Contains function definitions for inter prediction horizontal quarter pel interpolation. @* @* @author @* Mohit @* @* @par List of Functions: @* @* - ih264_inter_pred_luma_horz_qpel_a9q() @* @* @remarks @* None @* @******************************************************************************* @* @* All the functions here are replicated from ih264_inter_pred_filters.c @ @** @** @******************************************************************************* @* @* @brief @* Quarter pel interprediction luma filter for horizontal input @* @* @par Description: @* Applies a 6 tap horizontal filter .The output is clipped to 8 bits @* sec 8.4.2.2.1 titled "Luma sample interpolation process" @* @* @param[in] pu1_src @* UWORD8 pointer to the source @* @* @param[out] pu1_dst @* UWORD8 pointer to the destination @* @* @param[in] src_strd @* integer source stride @* @* @param[in] dst_strd @* integer destination stride @* @* @param[in] ht @* integer height of the array @* @* @param[in] wd @* integer width of the array @* @ @param[in] pu1_tmp: temporary buffer: UNUSED in this function @* @* @param[in] dydx: x and y reference offset for qpel calculations. @* @returns @* @ @remarks @* None @* @******************************************************************************* @* @void ih264_inter_pred_luma_horz ( @ UWORD8 *pu1_src, @ UWORD8 *pu1_dst, @ WORD32 src_strd, @ WORD32 dst_strd, @ WORD32 ht, @ WORD32 wd, @ UWORD8* pu1_tmp, @ UWORD32 dydx) @**************Variables Vs Registers***************************************** @ r0 => *pu1_src @ r1 => *pu1_dst @ r2 => src_strd @ r3 => dst_strd @ r5 => ht @ r6 => wd @ r7 => dydx .text .p2align 2 .global ih264_inter_pred_luma_horz_qpel_a9q ih264_inter_pred_luma_horz_qpel_a9q: stmfd sp!, {r4-r12, r14} @store register values to stack vstmdb sp!, {d8-d15} @push neon registers to stack ldr r5, [sp, #104] @Loads ht ldr r6, [sp, #108] @Loads wd ldr r7, [sp, #116] @Loads dydx and r7, r7, #3 @Finds x-offset add r7, r0, r7, lsr #1 @pu1_src + (x_offset>>1) sub r0, r0, #2 @pu1_src-2 vmov.i8 d0, #5 @filter coeff subs r12, r6, #8 @if wd=8 branch to loop_8 vmov.i8 d1, #20 @filter coeff beq loop_8 subs r12, r6, #4 @if wd=4 branch to loop_4 beq loop_4 loop_16: @when wd=16 @ Processing row0 and row1 vld1.8 {d2, d3, d4}, [r0], r2 @// Load row0 vext.8 d31, d2, d3, #5 @//extract a[5] (column1,row0) vld1.8 {d5, d6, d7}, [r0], r2 @// Load row1 vext.8 d30, d3, d4, #5 @//extract a[5] (column2,row0) vaddl.u8 q4, d31, d2 @// a0 + a5 (column1,row0) vext.8 d28, d5, d6, #5 @//extract a[5] (column1,row1) vaddl.u8 q5, d30, d3 @// a0 + a5 (column2,row0) vext.8 d27, d6, d7, #5 @//extract a[5] (column2,row1) vaddl.u8 q7, d28, d5 @// a0 + a5 (column1,row1) vext.8 d31, d2, d3, #2 @//extract a[2] (column1,row0) vaddl.u8 q8, d27, d6 @// a0 + a5 (column2,row1) vext.8 d30, d3, d4, #2 @//extract a[2] (column2,row0) vmlal.u8 q4, d31, d1 @// a0 + a5 + 20a2 (column1,row0) vext.8 d28, d5, d6, #2 @//extract a[2] (column1,row1) vmlal.u8 q5, d30, d1 @// a0 + a5 + 20a2 (column2,row0) vext.8 d27, d6, d7, #2 @//extract a[2] (column2,row1) vmlal.u8 q7, d28, d1 @// a0 + a5 + 20a2 (column1,row1) vext.8 d31, d2, d3, #3 @//extract a[3] (column1,row0) vmlal.u8 q8, d27, d1 @// a0 + a5 + 20a2 (column2,row1) vext.8 d30, d3, d4, #3 @//extract a[3] (column2,row0) vmlal.u8 q4, d31, d1 @// a0 + a5 + 20a2 + 20a3 (column1,row0) vext.8 d28, d5, d6, #3 @//extract a[3] (column1,row1) vmlal.u8 q5, d30, d1 @// a0 + a5 + 20a2 + 20a3 (column2,row0) vext.8 d27, d6, d7, #3 @//extract a[3] (column2,row1) vmlal.u8 q7, d28, d1 @// a0 + a5 + 20a2 + 20a3 (column1,row1) vext.8 d31, d2, d3, #1 @//extract a[1] (column1,row0) vmlal.u8 q8, d27, d1 @// a0 + a5 + 20a2 + 20a3 (column2,row1) vext.8 d30, d3, d4, #1 @//extract a[1] (column2,row0) vmlsl.u8 q4, d31, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 (column1,row0) vext.8 d28, d5, d6, #1 @//extract a[1] (column1,row1) vmlsl.u8 q5, d30, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 (column2,row0) vext.8 d27, d6, d7, #1 @//extract a[1] (column2,row1) vmlsl.u8 q7, d28, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 (column1,row1) vext.8 d31, d2, d3, #4 @//extract a[4] (column1,row0) vmlsl.u8 q8, d27, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 (column2,row1) vext.8 d30, d3, d4, #4 @//extract a[4] (column2,row0) vmlsl.u8 q4, d31, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 (column1,row0) vext.8 d28, d5, d6, #4 @//extract a[4] (column1,row1) vmlsl.u8 q5, d30, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 (column2,row0) vext.8 d27, d6, d7, #4 @//extract a[4] (column2,row1) vmlsl.u8 q7, d28, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 (column1,row1) vmlsl.u8 q8, d27, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 (column2,row1) vld1.32 {d12, d13}, [r7], r2 @Load value for interpolation (column1,row0) vqrshrun.s16 d20, q4, #5 @// (a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 + 16) >> 5 (column1,row0) vqrshrun.s16 d21, q5, #5 @// (a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 + 16) >> 5 (column2,row0) vext.8 d31, d2, d3, #5 @//extract a[5] (column1,row2) vrhadd.u8 q10, q6, q10 @Interpolation step for qpel calculation vqrshrun.s16 d18, q7, #5 @// (a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 + 16) >> 5 (column1,row1) vst1.8 {d20, d21}, [r1], r3 @//Store dest row0 vext.8 d30, d3, d4, #5 @//extract a[5] (column2,row2) vqrshrun.s16 d19, q8, #5 @// (a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 + 16) >> 5 (column2,row1) vld1.32 {d12, d13}, [r7], r2 @Load value for interpolation (column1,row1) vrhadd.u8 q9, q6, q9 @Interpolation step for qpel calculation vst1.8 {d18, d19}, [r1], r3 @//Store dest row1 subs r5, r5, #2 @ 2 rows done, decrement by 2 beq end_func b loop_16 loop_8: @ Processing row0 and row1 vld1.8 {d5, d6}, [r0], r2 @// Load row1 vext.8 d28, d5, d6, #5 @//extract a[5] (column1,row1) vld1.8 {d2, d3}, [r0], r2 @// Load row0 vext.8 d25, d5, d6, #2 @//extract a[2] (column1,row1) vext.8 d31, d2, d3, #5 @//extract a[5] (column1,row0) vext.8 d24, d5, d6, #3 @//extract a[3] (column1,row1) vext.8 d23, d5, d6, #1 @//extract a[1] (column1,row1) vext.8 d22, d5, d6, #4 @//extract a[4] (column1,row1) vaddl.u8 q7, d28, d5 @// a0 + a5 (column1,row1) vext.8 d29, d2, d3, #3 @//extract a[3] (column1,row0) vmlal.u8 q7, d25, d1 @// a0 + a5 + 20a2 (column1,row1) vmlal.u8 q7, d24, d1 @// a0 + a5 + 20a2 + 20a3 (column1,row1) vmlsl.u8 q7, d23, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 (column1,row1) vmlsl.u8 q7, d22, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 (column1,row1) vext.8 d30, d2, d3, #2 @//extract a[2] (column1,row0) vaddl.u8 q4, d31, d2 @// a0 + a5 (column1,row0) vext.8 d27, d2, d3, #1 @//extract a[1] (column1,row0) vext.8 d26, d2, d3, #4 @//extract a[4] (column1,row0) vmlal.u8 q4, d29, d1 @// a0 + a5 + 20a2 + 20a3 (column1,row0) vmlal.u8 q4, d30, d1 @// a0 + a5 + 20a2 (column1,row0) vmlsl.u8 q4, d27, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 (column1,row0) vmlsl.u8 q4, d26, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 (column1,row0) vqrshrun.s16 d18, q7, #5 @// (a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 + 16) >> 5 (column1,row0) vld1.32 d12, [r7], r2 @Load value for interpolation (column1,row0) vld1.32 d13, [r7], r2 @Load value for interpolation (column1,row1) vqrshrun.s16 d19, q4, #5 @// (a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 + 16) >> 5 (column1,row1) vrhadd.u8 q9, q6, q9 @Interpolation step for qpel calculation vst1.8 {d18}, [r1], r3 @//Store dest row0 vst1.8 {d19}, [r1], r3 @//Store dest row1 subs r5, r5, #2 @ 2 rows done, decrement by 2 beq end_func @ Branch if height==4 b loop_8 @looping if height == 8 or 16 loop_4: vld1.8 {d5, d6}, [r0], r2 @// Load row1 vext.8 d28, d5, d6, #5 @//extract a[5] (column1,row1) vld1.8 {d2, d3}, [r0], r2 @// Load row0 vext.8 d25, d5, d6, #2 @//extract a[2] (column1,row1) vext.8 d31, d2, d3, #5 @//extract a[5] (column1,row0) vaddl.u8 q7, d28, d5 @// a0 + a5 (column1,row1) vext.8 d24, d5, d6, #3 @//extract a[3] (column1,row1) vext.8 d23, d5, d6, #1 @//extract a[1] (column1,row1) vext.8 d22, d5, d6, #4 @//extract a[4] (column1,row1) vext.8 d29, d2, d3, #3 @//extract a[3] (column1,row0) vmlal.u8 q7, d25, d1 @// a0 + a5 + 20a2 (column1,row1) vmlal.u8 q7, d24, d1 @// a0 + a5 + 20a2 + 20a3 (column1,row1) vmlsl.u8 q7, d23, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 (column1,row1) vmlsl.u8 q7, d22, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 (column1,row1) vaddl.u8 q4, d31, d2 @// a0 + a5 (column1,row0) vext.8 d30, d2, d3, #2 @//extract a[2] (column1,row0) vld1.32 d12, [r7], r2 @Load value for interpolation (column1,row0) vld1.32 d13, [r7], r2 @Load value for interpolation (column1,row1) vext.8 d27, d2, d3, #1 @//extract a[1] (column1,row0) vext.8 d26, d2, d3, #4 @//extract a[4] (column1,row0) vmlal.u8 q4, d29, d1 @// a0 + a5 + 20a2 + 20a3 (column1,row0) vmlal.u8 q4, d30, d1 @// a0 + a5 + 20a2 (column1,row0) vmlsl.u8 q4, d27, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 (column1,row0) vmlsl.u8 q4, d26, d0 @// a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 (column1,row0) vqrshrun.s16 d18, q7, #5 @// (a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 + 16) >> 5 (column1,row0) vqrshrun.s16 d19, q4, #5 @// (a0 + a5 + 20a2 + 20a3 - 5a1 - 5a4 + 16) >> 5 (column1,row1) vrhadd.u8 q9, q6, q9 @Interpolation step for qpel calculation vst1.32 d18[0], [r1], r3 @//Store dest row0 vst1.32 d19[0], [r1], r3 @//Store dest row1 subs r5, r5, #2 @ 2 rows done, decrement by 2 beq end_func b loop_4 end_func: vldmia sp!, {d8-d15} @ Restore neon registers that were saved ldmfd sp!, {r4-r12, pc} @Restoring registers from stack