1@/****************************************************************************** 2@ * 3@ * Copyright (C) 2018 The Android Open Source Project 4@ * 5@ * Licensed under the Apache License, Version 2.0 (the "License"); 6@ * you may not use this file except in compliance with the License. 7@ * You may obtain a copy of the License at: 8@ * 9@ * http://www.apache.org/licenses/LICENSE-2.0 10@ * 11@ * Unless required by applicable law or agreed to in writing, software 12@ * distributed under the License is distributed on an "AS IS" BASIS, 13@ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14@ * See the License for the specific language governing permissions and 15@ * limitations under the License. 16@ * 17@ ***************************************************************************** 18@ * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore 19@*/ 20 21 22.text 23.p2align 2 24 .global ixheaacd_mps_synt_pre_twiddle_armv7 25 26 27ixheaacd_mps_synt_pre_twiddle_armv7: 28 29 STMFD sp!, {r4-r12, r14} 30 VPUSH {D8-D15} 31 lsl R3, R3, #1 32LOOP1: 33 VLD1.32 {D0}, [R2]! 34 VLD1.32 {D1}, [R1]! 35 VLD2.32 {D2, D3}, [R0] 36 VNEG.S32 D12, D2 37 38 VMULL.S32 Q2, D0, D12 39 VMULL.S32 Q3, D0, D3 40 VMULL.S32 Q4, D1, D2 41 VMULL.S32 Q5, D1, D3 42 43 VSHRN.I64 D4, Q2, #31 44 VSHRN.I64 D6, Q3, #31 45 VSHRN.I64 D8, Q4, #31 46 VSHRN.I64 D10, Q5, #31 47 48 VQADD.S32 D0, D8, D6 49 VQADD.S32 D1, D4, D10 50 51 SUBS R3, R3, #4 52 VST2.32 {D0, D1} , [R0]! 53 BGT LOOP1 54 55 VPOP {D8-D15} 56 LDMFD sp!, {r4-r12, r15} 57 58 59 60 61