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/* ARM assembly AARCH64 Raspberry PI 3B */
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/* program mergeSort64.s */
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/*******************************************/
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/* Constantes file */
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/*******************************************/
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/* for this file see task include a file in language AArch64 assembly */
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.include "../includeConstantesARM64.inc"
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/*********************************/
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/* Initialized data */
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/*********************************/
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.data
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szMessSortOk: .asciz "Table sorted.\n"
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szMessSortNok: .asciz "Table not sorted !!!!!.\n"
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sMessResult: .asciz "Value : @ \n"
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szCarriageReturn: .asciz "\n"
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.align 4
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TableNumber: .quad 1,3,11,6,2,5,9,10,8,4,7
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#TableNumber: .quad 10,9,8,7,6,-5,4,3,2,1
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.equ NBELEMENTS, (. - TableNumber) / 8
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/*********************************/
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/* UnInitialized data */
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/*********************************/
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.bss
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sZoneConv: .skip 24
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/*********************************/
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/* code section */
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/*********************************/
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.text
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.global main
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main: // entry of program
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ldr x0,qAdrTableNumber // address number table
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mov x1,0 // first element
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mov x2,NBELEMENTS // number of élements
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bl mergeSort
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ldr x0,qAdrTableNumber // address number table
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bl displayTable
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ldr x0,qAdrTableNumber // address number table
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mov x1,NBELEMENTS // number of élements
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bl isSorted // control sort
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cmp x0,1 // sorted ?
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beq 1f
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ldr x0,qAdrszMessSortNok // no !! error sort
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bl affichageMess
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b 100f
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1: // yes
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ldr x0,qAdrszMessSortOk
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bl affichageMess
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100: // standard end of the program
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mov x0,0 // return code
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mov x8,EXIT // request to exit program
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svc 0 // perform the system call
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qAdrsZoneConv: .quad sZoneConv
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qAdrszCarriageReturn: .quad szCarriageReturn
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qAdrsMessResult: .quad sMessResult
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qAdrTableNumber: .quad TableNumber
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qAdrszMessSortOk: .quad szMessSortOk
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qAdrszMessSortNok: .quad szMessSortNok
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/******************************************************************/
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/* control sorted table */
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/******************************************************************/
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/* x0 contains the address of table */
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/* x1 contains the number of elements > 0 */
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/* x0 return 0 if not sorted 1 if sorted */
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isSorted:
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stp x2,lr,[sp,-16]! // save registers
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stp x3,x4,[sp,-16]! // save registers
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mov x2,0
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ldr x4,[x0,x2,lsl 3]
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1:
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add x2,x2,1
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cmp x2,x1
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bge 99f
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ldr x3,[x0,x2, lsl 3]
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cmp x3,x4
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blt 98f
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mov x4,x3
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b 1b
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98:
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mov x0,0 // not sorted
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b 100f
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99:
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mov x0,1 // sorted
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100:
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ldp x3,x4,[sp],16 // restaur 2 registers
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ldp x2,lr,[sp],16 // restaur 2 registers
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ret // return to address lr x30
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/******************************************************************/
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/* merge */
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/******************************************************************/
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/* r0 contains the address of table */
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/* r1 contains first start index
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/* r2 contains second start index */
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/* r3 contains the last index */
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merge:
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stp x1,lr,[sp,-16]! // save registers
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stp x2,x3,[sp,-16]! // save registers
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stp x4,x5,[sp,-16]! // save registers
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stp x6,x7,[sp,-16]! // save registers
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str x8,[sp,-16]!
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mov x5,x2 // init index x2->x5
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1: // begin loop first section
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ldr x6,[x0,x1,lsl 3] // load value first section index r1
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ldr x7,[x0,x5,lsl 3] // load value second section index r5
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cmp x6,x7
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ble 4f // <= -> location first section OK
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str x7,[x0,x1,lsl 3] // store value second section in first section
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add x8,x5,1
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cmp x8,x3 // end second section ?
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ble 2f
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str x6,[x0,x5,lsl 3]
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b 4f // loop
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2: // loop insert element part 1 into part 2
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sub x4,x8,1
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ldr x7,[x0,x8,lsl 3] // load value 2
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cmp x6,x7 // value <
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bge 3f
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str x6,[x0,x4,lsl 3] // store value
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b 4f // loop
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3:
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str x7,[x0,x4,lsl 3] // store value 2
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add x8,x8,1
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cmp x8,x3 // end second section ?
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ble 2b // no loop
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sub x8,x8,1
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str x6,[x0,x8,lsl 3] // store value 1
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4:
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add x1,x1,1
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cmp x1,x2 // end first section ?
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blt 1b
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100:
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ldr x8,[sp],16 // restaur 1 register
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ldp x6,x7,[sp],16 // restaur 2 registers
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ldp x4,x5,[sp],16 // restaur 2 registers
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ldp x2,x3,[sp],16 // restaur 2 registers
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ldp x1,lr,[sp],16 // restaur 2 registers
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ret // return to address lr x30
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/******************************************************************/
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/* merge sort */
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/******************************************************************/
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/* x0 contains the address of table */
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/* x1 contains the index of first element */
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/* x2 contains the number of element */
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mergeSort:
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stp x3,lr,[sp,-16]! // save registers
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stp x4,x5,[sp,-16]! // save registers
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stp x6,x7,[sp,-16]! // save registers
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cmp x2,2 // end ?
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blt 100f
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lsr x4,x2,1 // number of element of each subset
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add x5,x4,1
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tst x2,#1 // odd ?
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csel x4,x5,x4,ne
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mov x5,x1 // save first element
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mov x6,x2 // save number of element
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mov x7,x4 // save number of element of each subset
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mov x2,x4
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bl mergeSort
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mov x1,x7 // restaur number of element of each subset
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mov x2,x6 // restaur number of element
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sub x2,x2,x1
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mov x3,x5 // restaur first element
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add x1,x1,x3 // + 1
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bl mergeSort // sort first subset
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mov x1,x5 // restaur first element
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mov x2,x7 // restaur number of element of each subset
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add x2,x2,x1
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mov x3,x6 // restaur number of element
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add x3,x3,x1
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sub x3,x3,1 // last index
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bl merge
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100:
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ldp x6,x7,[sp],16 // restaur 2 registers
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ldp x4,x5,[sp],16 // restaur 2 registers
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ldp x3,lr,[sp],16 // restaur 2 registers
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ret // return to address lr x30
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/******************************************************************/
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/* Display table elements */
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/******************************************************************/
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/* x0 contains the address of table */
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displayTable:
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stp x1,lr,[sp,-16]! // save registers
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stp x2,x3,[sp,-16]! // save registers
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mov x2,x0 // table address
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mov x3,0
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1: // loop display table
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ldr x0,[x2,x3,lsl 3]
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ldr x1,qAdrsZoneConv
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bl conversion10S // décimal conversion
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ldr x0,qAdrsMessResult
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ldr x1,qAdrsZoneConv
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bl strInsertAtCharInc // insert result at // character
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bl affichageMess // display message
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add x3,x3,1
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cmp x3,NBELEMENTS - 1
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ble 1b
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ldr x0,qAdrszCarriageReturn
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bl affichageMess
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mov x0,x2
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100:
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ldp x2,x3,[sp],16 // restaur 2 registers
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ldp x1,lr,[sp],16 // restaur 2 registers
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ret // return to address lr x30
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/********************************************************/
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/* File Include fonctions */
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/********************************************************/
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/* for this file see task include a file in language AArch64 assembly */
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.include "../includeARM64.inc"
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