How to resolve the algorithm Loops/While step by step in the AArch64 Assembly programming language

Published on 12 May 2024 09:40 PM
#Aarch64 assembly

How to resolve the algorithm Loops/While step by step in the AArch64 Assembly programming language

Table of Contents

Problem Statement

Start an integer value at   1024. Loop while it is greater than zero. Print the value (with a newline) and divide it by two each time through the loop.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Loops/While step by step in the AArch64 Assembly programming language

Source code in the aarch64 programming language

/* ARM assembly AARCH64 Raspberry PI 3B */
/*  program loopwhile64.s   */
 
/*******************************************/
/* Constantes file                         */
/*******************************************/
/* for this file see task include a file in language AArch64 assembly*/
.include "../includeConstantesARM64.inc"
/*********************************/
/* Initialized data              */
/*********************************/
.data
szMessResult:      .asciz "@"            // message result
szCarriageReturn:  .asciz "\n"
/*********************************/
/* UnInitialized data            */
/*********************************/
.bss 
sZoneConv:           .skip 24
/*********************************/
/*  code section                 */
/*********************************/
.text
.global main 
main:                                    // entry of program 
    mov x20,#1024                        // loop counter
1:                                       // begin loop 
    mov x0,x20
    ldr x1,qAdrsZoneConv                 // display value
    bl conversion10                      // decimal conversion
    ldr x0,qAdrszMessResult
    ldr x1,qAdrsZoneConv
    bl strInsertAtCharInc                // insert result at @ character
    bl affichageMess                     // display message
    ldr x0,qAdrszCarriageReturn
    bl affichageMess                     // display return line
    lsr x20,x20,1                        // division by 2
    cmp x20,0                            // end ?
    bgt 1b                               // no ->begin loop one
 
 
100:                                     // standard end of the program 
    mov x0,0                             // return code
    mov x8,EXIT                          // request to exit program
    svc 0                                // perform the system call
 
qAdrsZoneConv:            .quad sZoneConv
qAdrszMessResult:         .quad szMessResult
qAdrszCarriageReturn:     .quad szCarriageReturn

/********************************************************/
/*        File Include fonctions                        */
/********************************************************/
/* for this file see task include a file in language AArch64 assembly */
.include "../includeARM64.inc"

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