133 lines
3.3 KiB
ArmAsm
133 lines
3.3 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_conv_ergtoamplitude_armv7
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ixheaacd_conv_ergtoamplitude_armv7:
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STMFD sp!, {r4-r12, r14}
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LDR R5, [SP, #44]
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LDR R4, [SP, #40]
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MOVW R14, #0x1FF
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MOVW R10, #0x5A82
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LOOP1:
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LDRSH R6, [R2], #2
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LDRSH R7, [R2], #2
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MOV R12, #0
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MOV R9, #-16
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MOVS R6, R6
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BLE ENDIF1_1
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CLZ R8, R6
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SUB R8, R8, #17
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SUB R7, R7, R8
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MOV R11, R6, LSL R8
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MOV R11, R11, ASR #5
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ANDS R11, R11, R14
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BIC R11, R11, #1
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LDRH R12, [R11, R5]
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TST R7, #1
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ADDNE R7, R7, #3
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SMULWBNE R12, R12, R10
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MOV R9, R7, ASR #1
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ENDIF1_1:
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STRH R12, [R2, #-4]
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STRH R9, [R2, #-2]
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LDRSH R6, [R3], #2
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LDRSH R7, [R3], #2
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MOV R8, #0
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MOV R9, #-16
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MOVS R6, R6
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BLE ENDIF1_2
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CLZ R8, R6
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SUB R8, R8, #17
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SUB R7, R7, R8
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MOV R11, R6, LSL R8
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MOV R11, R11, ASR #5
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ANDS R11, R11, R14
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BIC R11, R11, #1
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LDRH R8, [R11, R5]
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TST R7, #1
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ADDNE R7, R7, #3
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SMULWBNE R8, R8, R10
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MOV R9, R7, ASR #1
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ENDIF1_2:
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STRH R8, [R3, #-4]
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STRH R9, [R3, #-2]
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LDRSH R6, [R4], #2
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LDRSH R7, [R4], #2
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MOV R8, #0
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MOV R9, #-16
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MOVS R6, R6
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BLE ENDIF1_3
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CLZ R8, R6
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SUB R8, R8, #17
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SUB R7, R7, R8
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MOV R11, R6, LSL R8
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MOV R11, R11, ASR #5
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ANDS R11, R11, R14
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BIC R11, R11, #1
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LDRH R8, [R11, R5]
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TST R7, #1
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ADDNE R7, R7, #3
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SMULWBNE R8, R8, R10
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MOV R9, R7, ASR #1
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ENDIF1_3:
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STRH R9, [R4, #-2]
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SUB R6, R1, R9
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SUBS R6, R6, #4
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RSBLE R6, R6, #0
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MOVGT R8, R8, ASR R6
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MOVLE R8, R8, LSL R6
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STRH R8, [R4, #-4]
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SUBS R0, R0, #1
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BGT LOOP1
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LDMFD sp!, {r4-r12, r15}
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