| @/****************************************************************************** |
| @ * |
| @ * Copyright (C) 2018 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 |
| @*/ |
| |
| |
| .text |
| .p2align 2 |
| .global ixheaacd_expsubbandsamples_armv7 |
| ixheaacd_expsubbandsamples_armv7: |
| |
| STMFD sp!, {r4-r12} |
| |
| LDR r7, [sp, #0x24] |
| LDR r10, [sp, #0x28] |
| SUB r11, r3, r2 |
| MOV r12, #1 |
| CMP r7, r10 |
| BGE EXIT |
| |
| MOVS r3, r11 |
| BEQ EXIT |
| |
| |
| LDR r4, [sp, #0x2c] |
| CMP r4, #0 |
| BEQ HQ_OUTER_LOOP |
| |
| |
| |
| SUB r10, r10, r7 |
| ADD r0, r0, r7, LSL #2 |
| LDR r1, [r0], #4 |
| |
| OUTERLOOP: |
| MOV r3, r11 |
| ADD r5, r1, r2, LSL #2 |
| INLOOP: |
| |
| LDR r4, [r5], #4 |
| SUBS r3, r3, #2 |
| LDRGE r8, [r5], #4 |
| EOR r1 , r4 , r4, asr #31 |
| ORR r12, r12, r1 |
| EORGE r1 , r8 , r8, asr #31 |
| ORRGE r12, r12, r1 |
| BGT INLOOP |
| |
| SUBS r10, r10, #1 |
| LDR r1, [r0], #4 |
| BGT OUTERLOOP |
| |
| |
| |
| B EXIT |
| |
| |
| HQ_OUTER_LOOP: |
| LDR r6, [r0, r7, LSL #2] |
| LDR r5, [r1, r7, LSL #2] |
| ADD r6, r6, r2, LSL #2 |
| ADD r5, r5, r2, LSL #2 |
| MOV r4, r11 |
| |
| HQ_IN_LOOP: |
| LDR r8, [r6], #4 |
| LDR r9, [r5], #4 |
| SUBS r4, r4, #2 |
| |
| EOR r3 , r8 , r8, asr #31 |
| ORR r12, r12, r3 |
| |
| EOR r3 , r9 , r9, asr #31 |
| ORR r12, r12, r3 |
| |
| LDRGE r8, [r6], #4 |
| LDRGE r9, [r5], #4 |
| |
| EORGE r3 , r8 , r8, asr #31 |
| ORRGE r12, r12, r3 |
| |
| EORGE r3 , r9 , r9, asr #31 |
| ORRGE r12, r12, r3 |
| |
| BGT HQ_IN_LOOP |
| |
| INLOEN: |
| ADD r7, r7, #1 |
| CMP r7, r10 |
| BLT HQ_OUTER_LOOP |
| |
| EXIT: |
| |
| CLZ r0, r12 |
| SUB r0, r0, #1 |
| LDMFD sp!, {r4-r12} |
| BX lr |
| |