114 lines
2.8 KiB
ArmAsm
114 lines
2.8 KiB
ArmAsm
@/******************************************************************************
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@ *
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@ * Copyright (C) 2018 The Android Open Source Project
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@ *
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@ * Licensed under the Apache License, Version 2.0 (the "License");
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@ * you may not use this file except in compliance with the License.
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@ * You may obtain a copy of the License at:
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@ *
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@ * http://www.apache.org/licenses/LICENSE-2.0
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@ *
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@ * Unless required by applicable law or agreed to in writing, software
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@ * distributed under the License is distributed on an "AS IS" BASIS,
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@ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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@ * See the License for the specific language governing permissions and
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@ * limitations under the License.
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@ *
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@ *****************************************************************************
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@ * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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@*/
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.text
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.p2align 2
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.global ixheaacd_expsubbandsamples_armv7
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ixheaacd_expsubbandsamples_armv7:
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STMFD sp!, {r4-r12}
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LDR r7, [sp, #0x24]
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LDR r10, [sp, #0x28]
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SUB r11, r3, r2
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MOV r12, #1
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CMP r7, r10
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BGE EXIT
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MOVS r3, r11
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BEQ EXIT
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LDR r4, [sp, #0x2c]
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CMP r4, #0
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BEQ HQ_OUTER_LOOP
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SUB r10, r10, r7
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ADD r0, r0, r7, LSL #2
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LDR r1, [r0], #4
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OUTERLOOP:
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MOV r3, r11
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ADD r5, r1, r2, LSL #2
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INLOOP:
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LDR r4, [r5], #4
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SUBS r3, r3, #2
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LDRGE r8, [r5], #4
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EOR r1 , r4 , r4, asr #31
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ORR r12, r12, r1
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EORGE r1 , r8 , r8, asr #31
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ORRGE r12, r12, r1
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BGT INLOOP
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SUBS r10, r10, #1
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LDR r1, [r0], #4
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BGT OUTERLOOP
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B EXIT
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HQ_OUTER_LOOP:
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LDR r6, [r0, r7, LSL #2]
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LDR r5, [r1, r7, LSL #2]
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ADD r6, r6, r2, LSL #2
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ADD r5, r5, r2, LSL #2
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MOV r4, r11
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HQ_IN_LOOP:
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LDR r8, [r6], #4
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LDR r9, [r5], #4
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SUBS r4, r4, #2
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EOR r3 , r8 , r8, asr #31
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ORR r12, r12, r3
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EOR r3 , r9 , r9, asr #31
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ORR r12, r12, r3
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LDRGE r8, [r6], #4
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LDRGE r9, [r5], #4
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EORGE r3 , r8 , r8, asr #31
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ORRGE r12, r12, r3
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EORGE r3 , r9 , r9, asr #31
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ORRGE r12, r12, r3
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BGT HQ_IN_LOOP
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INLOEN:
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ADD r7, r7, #1
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CMP r7, r10
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BLT HQ_OUTER_LOOP
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EXIT:
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CLZ r0, r12
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SUB r0, r0, #1
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LDMFD sp!, {r4-r12}
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BX lr
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