@/****************************************************************************** @ * @ * 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_chroma_a9q.s @* @* @brief @* Contains function definitions for inter prediction interpolation. @* @* @author @* Ittaim @* @* @par List of Functions: @* @* - ih264_inter_pred_chroma_a9q() @* @* @remarks @* None @* @******************************************************************************* @* @* All the functions here are replicated from ih264_inter_pred_filters.c @ @** @** @** @ @** @******************************************************************************* @* @* @brief @* Interprediction chroma filter @* @* @par Description: @* Applies filtering to chroma samples as mentioned in @* sec 8.4.2.2.2 titled "chroma sample interpolation process" @* @* @param[in] pu1_src @* UWORD8 pointer to the source containing alternate U and V samples @* @* @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]uc_dx @* dx value where the sample is to be produced(refer sec 8.4.2.2.2 ) @* @* @param[in] uc_dy @* dy value where the sample is to be produced(refer sec 8.4.2.2.2 ) @* @* @param[in] ht @* integer height of the array @* @* @param[in] wd @* integer width of the array @* @* @returns @* @* @remarks @* None @* @******************************************************************************* @* @void ih264_inter_pred_chroma(UWORD8 *pu1_src, @ UWORD8 *pu1_dst, @ WORD32 src_strd, @ WORD32 dst_strd, @ WORD32 u1_dx, @ WORD32 u1_dy, @ WORD32 ht, @ WORD32 wd) @**************Variables Vs Registers***************************************** @ r0 => *pu1_src @ r1 => *pu1_dst @ r2 => src_strd @ r3 => dst_strd @ r4 => u1_dx @ r5 => u1_dy @ r6 => height @ r7 => width @ .text .p2align 2 .global ih264_inter_pred_chroma_a9q ih264_inter_pred_chroma_a9q: stmfd sp!, {r4-r12, r14} @store register values to stack vstmdb sp!, {d8-d15} @push neon registers to stack ldr r4, [sp, #104] ldr r5, [sp, #108] ldr r6, [sp, #112] ldr r7, [sp, #116] rsb r8, r4, #8 @8-u1_dx rsb r9, r5, #8 @8-u1_dy mul r10, r8, r9 mul r11, r4, r9 vdup.u8 d28, r10 vdup.u8 d29, r11 mul r10, r8, r5 mul r11, r4, r5 vdup.u8 d30, r10 vdup.u8 d31, r11 subs r12, r7, #2 @if wd=4 branch to loop_4 beq loop_2 subs r12, r7, #4 @if wd=8 branch to loop_8 beq loop_4 loop_8: sub r6, #1 vld1.8 {d0, d1, d2}, [r0], r2 @ Load row0 vld1.8 {d5, d6, d7}, [r0], r2 @ Load row1 vext.8 d3, d0, d1, #2 vext.8 d8, d5, d6, #2 vmull.u8 q5, d0, d28 vmlal.u8 q5, d5, d30 vmlal.u8 q5, d3, d29 vmlal.u8 q5, d8, d31 vext.8 d9, d6, d7, #2 vext.8 d4, d1, d2, #2 inner_loop_8: vmull.u8 q6, d6, d30 vmlal.u8 q6, d1, d28 vmlal.u8 q6, d9, d31 vmlal.u8 q6, d4, d29 vmov d0, d5 vmov d3, d8 vqrshrun.s16 d14, q5, #6 vmov d1, d6 vmov d4, d9 vld1.8 {d5, d6, d7}, [r0], r2 @ Load row1 vqrshrun.s16 d15, q6, #6 vext.8 d8, d5, d6, #2 subs r6, #1 vext.8 d9, d6, d7, #2 vst1.8 {q7}, [r1], r3 @ Store dest row vmull.u8 q5, d0, d28 vmlal.u8 q5, d5, d30 vmlal.u8 q5, d3, d29 vmlal.u8 q5, d8, d31 bne inner_loop_8 vmull.u8 q6, d6, d30 vmlal.u8 q6, d1, d28 vmlal.u8 q6, d9, d31 vmlal.u8 q6, d4, d29 vqrshrun.s16 d14, q5, #6 vqrshrun.s16 d15, q6, #6 vst1.8 {q7}, [r1], r3 @ Store dest row b end_func loop_4: sub r6, #1 vld1.8 {d0, d1}, [r0], r2 @ Load row0 vld1.8 {d2, d3}, [r0], r2 @ Load row1 vext.8 d1, d0, d1, #2 vext.8 d3, d2, d3, #2 vmull.u8 q2, d2, d30 vmlal.u8 q2, d0, d28 vmlal.u8 q2, d3, d31 vmlal.u8 q2, d1, d29 inner_loop_4: subs r6, #1 vmov d0, d2 vmov d1, d3 vld1.8 {d2, d3}, [r0], r2 @ Load row1 vqrshrun.s16 d6, q2, #6 vext.8 d3, d2, d3, #2 vst1.8 {d6}, [r1], r3 @ Store dest row vmull.u8 q2, d0, d28 vmlal.u8 q2, d2, d30 vmlal.u8 q2, d1, d29 vmlal.u8 q2, d3, d31 bne inner_loop_4 vqrshrun.s16 d6, q2, #6 vst1.8 {d6}, [r1], r3 @ Store dest row b end_func loop_2: vld1.8 {d0}, [r0], r2 @ Load row0 vext.8 d1, d0, d0, #2 vld1.8 {d2}, [r0], r2 @ Load row1 vext.8 d3, d2, d2, #2 vmull.u8 q2, d0, d28 vmlal.u8 q2, d1, d29 vmlal.u8 q2, d2, d30 vmlal.u8 q2, d3, d31 vld1.8 {d6}, [r0] @ Load row2 vqrshrun.s16 d4, q2, #6 vext.8 d7, d6, d6, #2 vst1.32 d4[0], [r1], r3 @ Store dest row0 vmull.u8 q4, d2, d28 vmlal.u8 q4, d3, d29 vmlal.u8 q4, d6, d30 vmlal.u8 q4, d7, d31 subs r6, #2 vqrshrun.s16 d8, q4, #6 vst1.32 d8[0], [r1], r3 @ Store dest row1 bne loop_2 @ repeat if ht=2 end_func: vldmia sp!, {d8-d15} @ Restore neon registers that were saved ldmfd sp!, {r4-r12, pc} @ Restoring registers from stack