206 lines
4.9 KiB
ArmAsm
206 lines
4.9 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_adjust_scale_armv7
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ixheaacd_adjust_scale_armv7:
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STMFD SP!, {R4-R11, R14}
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LDR R4, [SP, #44]
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LDR R5, [SP, #36]
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LDR R6, [SP, #40]
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MOVS R4, R4
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BEQ ENDRESSCALE
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SUBS R3, R3, R2
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BLE ENDRESSCALE
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SUBS R6, R6, R5
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BLE ENDRESSCALE
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ADD R9, R0, R5, LSL#2
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LDR R10, [R9], #4
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CMP R4, #31
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MOVGT R4, #31
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CMP R4, #-31
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MOVLT R4, #-31
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LDR R8, [SP, #48]
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MOVS R8, R8
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BEQ ELIF1
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MOVS R4, R4
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BLE ELIF2_1
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LOOP1:
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ADD R10, R10, R2, LSL #2
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MOV R7, R3
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INNLOOP1:
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LDR R11, [R10]
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SUBS R7, R7 , #2
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LDRGE R5, [R10, #4]
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MOV R11, R11, LSL R4
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STR R11, [R10], #4
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MOVGE R5, R5, LSL R4
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STRGE R5, [R10], #4
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BGT INNLOOP1
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LDR R10, [R9], #4
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SUBS R6, R6, #1
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BGT LOOP1
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B ENDRESSCALE
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ELIF2_1:
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RSB R4, R4, #0
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LOOP2:
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ADD R10, R10, R2, LSL #2
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MOV R7, R3
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INNLOOP2:
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LDR R11, [R10]
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SUBS R7, R7 , #2
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LDRGE R5, [R10, #4]
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MOV R11, R11, ASR R4
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STR R11, [R10], #4
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MOVGE R5, R5, ASR R4
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STRGE R5, [R10], #4
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BGT INNLOOP2
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LDR R10, [R9], #4
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SUBS R6, R6, #1
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BGT LOOP2
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B ENDRESSCALE
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ELIF1:
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ADD R5, R1, R5, LSL#2
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MOVS R4, R4
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BLE ELIF2_2
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LOOP3:
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LDR R8, [R5], #4
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ADD R10, R10, R2, LSL #2
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ADD R8, R8, R2, LSL #2
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BICS R7, R3, #1
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BEQ COUNTODD1
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INNLOOP3:
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LDR R11, [R10]
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LDR R1, [R8]
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MOV R11, R11, LSL R4
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MOV R1, R1, LSL R4
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STR R11, [R10], #4
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STR R1, [R8], #4
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LDR R11, [R10]
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LDR R1, [R8]
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MOV R11, R11, LSL R4
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MOV R1, R1, LSL R4
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STR R11, [R10], #4
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STR R1, [R8], #4
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SUBS R7, R7 , #2
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BGT INNLOOP3
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COUNTODD1:
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BIC R7, R3, #1
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CMP R7, R3
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BEQ INNLOOP3END
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LDR R11, [R10]
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LDR R1, [R8]
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MOV R11, R11, LSL R4
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MOV R1, R1, LSL R4
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STR R11, [R10], #4
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STR R1, [R8], #4
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INNLOOP3END:
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LDR R10, [R9], #4
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SUBS R6, R6, #1
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BGT LOOP3
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B ENDRESSCALE
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ELIF2_2:
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RSB R4, R4, #0
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LOOP4:
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LDR R8, [R5], #4
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ADD R10, R10, R2, LSL #2
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ADD R8, R8, R2, LSL #2
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BICS R7, R3, #1
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BEQ COUNTODD2
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INNLOOP4:
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LDR R11, [R10]
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LDR R1, [R8]
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MOV R11, R11, ASR R4
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MOV R1, R1, ASR R4
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STR R11, [R10], #4
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STR R1, [R8], #4
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LDR R11, [R10]
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LDR R1, [R8]
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MOV R11, R11, ASR R4
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MOV R1, R1, ASR R4
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STR R11, [R10], #4
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STR R1, [R8], #4
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SUBS R7, R7 , #2
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BGT INNLOOP4
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COUNTODD2:
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BIC R7, R3, #1
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CMP R7, R3
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BEQ INNLOOP4END
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LDR R11, [R10]
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LDR R1, [R8]
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MOV R11, R11, ASR R4
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MOV R1, R1, ASR R4
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STR R11, [R10], #4
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STR R1, [R8], #4
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INNLOOP4END:
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LDR R10, [R9], #4
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SUBS R6, R6, #1
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BGT LOOP4
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ENDRESSCALE:
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LDMFD sp!, {r4-r11, r15}
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