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