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Task/Loops-Break/AArch64-Assembly/loops-break.aarch64

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+/* ARM assembly AARCH64 Raspberry PI 3B */
+/*  program loopbreak64.s   */
+
+/*******************************************/
+/* Constantes file                         */
+/*******************************************/
+/* for this file see task include a file in language AArch64 assembly*/
+.include "../includeConstantesARM64.inc"
+
+/*********************************/
+/* Initialized data              */
+/*********************************/
+.data
+szMessEndLoop: .asciz "loop break with value : \n"
+szMessResult:  .asciz "Resultat = @ \n"      // message result
+
+.align 4
+qGraine:  .quad 12345678
+/*********************************/
+/* UnInitialized data            */
+/*********************************/
+.bss
+sZoneConv:               .skip 24
+/*********************************/
+/*  code section                 */
+/*********************************/
+.text
+.global main
+main:                          // entry of program
+1:                             // begin loop
+    mov x4,20
+2:
+    mov x0,19
+    bl genereraleas            // generate number
+    cmp x0,10                  // compar value
+    beq 3f                     // break if equal
+    ldr x1,qAdrsZoneConv       // display value
+    bl conversion10            // call function with 2 parameter (x0,x1)
+    ldr x0,qAdrszMessResult
+    ldr x1,qAdrsZoneConv
+    bl strInsertAtCharInc      // insert result at third @ character
+    bl affichageMess           // display message final
+    subs x4,x4,1                 // decrement counter
+    bgt 2b                     // loop if greather
+    b 1b                       // begin loop one
+
+3:
+    mov x2,x0                  // save value
+    ldr x0,qAdrszMessEndLoop
+    bl affichageMess           // display message
+    mov x0,x2
+    ldr x1,qAdrsZoneConv
+    bl conversion10            // call function with 2 parameter (x0,x1)
+    ldr x0,qAdrszMessResult
+    ldr x1,qAdrsZoneConv
+    bl strInsertAtCharInc      // insert result at third @ character
+    bl affichageMess           // display message
+
+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
+qAdrszMessEndLoop:        .quad szMessEndLoop
+
+/***************************************************/
+/*   Generation random number                  */
+/***************************************************/
+/* x0 contains limit  */
+genereraleas:
+    stp x1,lr,[sp,-16]!    // save  registers
+    stp x2,x3,[sp,-16]!    // save  registers
+    ldr x3,qAdrqGraine     // load graine
+    ldr x2,[x3]
+    lsr x1,x2,17           // see xorshift on wikipedia
+    eor x2,x2,x1
+    lsl x1,x2,31
+    eor x2,x2,x1
+    lsr x1,x2,8
+    eor x1,x2,x1
+    str x1,[x3]            // save graine for the next call
+    udiv x1,x2,x0          // divide by value maxi
+    msub x0,x1,x0,x2       // résult = remainder
+100:                       // end function
+    ldp x2,x3,[sp],16      // restaur  2 registers
+    ldp x1,lr,[sp],16      // restaur  2 registers
+    ret                    // return to address lr x30
+/********************************************************************/
+qAdrqGraine: .quad qGraine
+/********************************************************/
+/*        File Include fonctions                        */
+/********************************************************/
+/* for this file see task include a file in language AArch64 assembly */
+.include "../includeARM64.inc"