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@/******************************************************************************
@ *
@ * 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_calc_max_spectral_line_armv7
ixheaacd_calc_max_spectral_line_armv7:
STMFD sp!, {R4-R12, R14}
MOV R4, R1, LSR #3
MOV R6, R4, LSL #3
VMOV.S32 D6, #0x00000000
VMOV.S32 D7, #0x00000000
LOOP_1:
VLD1.32 {D0, D1}, [R0]!
VLD1.32 {D2, D3}, [R0]!
VABS.S32 Q0, Q0
VABS.S32 Q1, Q1
SUBS R4, R4, #1
VORR Q3, Q0, Q3
VORR Q3, Q1, Q3
BGT LOOP_1
SUBS R7, R1, R6
VMOV.32 R4, D6[0]
VMOV.32 R1, D6[1]
VMOV.32 R2, D7[0]
ORR R4, R4, R1
VMOV.32 R3, D7[1]
ORR R4, R4, R2
ORR R4, R4, R3
BEQ END_FUNC
LOOP_2:
LDR R2, [R0], #4
MOVS R2, R2
RSBMI R2, R2, #0
ORR R4, R4, R2
SUBS R7, R7, #1
BGT LOOP_2
END_FUNC:
MOVS R0, R4
MVNMI R0, R0
CLZ R0, R0
SUB R0, R0, #1
LDMFD sp!, {R4-R12, R15}
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