Data update

Task/String-case/ARM-Assembly/string-case.arm

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+/* ARM assembly Raspberry PI  */
+/*  program strcase.s   */
+
+/************************************/
+/* Constantes                       */
+/************************************/
+/* for this file see task include a file in language ARM assembly*/
+.include "../constantes.inc"
+
+/************************************/
+/* Initialized data                 */
+/************************************/
+.data
+szMessResult:         .asciz "Result: \n"
+szString:             .asciz "alphaBETA"
+szCarriageReturn:     .asciz "\n"
+szMessStart:          .asciz "Program 32 bits start.\n"
+/************************************/
+/* UnInitialized data               */
+/************************************/
+.bss
+sBuffer:            .skip 80
+sBuffer1:           .skip 80
+/************************************/
+/*  code section                    */
+/************************************/
+.text
+.global main
+main:                    @ entry of program
+    ldr r0,iAdrszMessStart
+    bl affichageMess
+    ldr r1,iAdrszString
+    ldr r3,iAdrsBuffer
+    ldr r4,iAdrsBuffer1
+    mov r6,#0b100000     @ 1 -> bit 5
+    mov r2,#0
+1:
+    ldrb r0,[r1,r2]      @ load byte of string
+    mov r5,r0
+    cmp r0,#'A'          @ select alpha characters lower or upper
+    blt 3f
+    cmp r0,#'z'
+    bgt 3f
+    cmp r0,#'Z'
+    ble 2f
+    cmp r0,#'a'
+    bge 2f
+    b 3f
+2:
+    orr r0,r0,r6          @ converion in lower case (1 -> bit 5)
+    bic r5,r0,r6          @ converion in upper case (0 -> bit 5)
+3:
+    strb r0,[r3,r2]       @ store lower character
+    strb r5,[r4,r2]       @ store upper character
+    cmp r0,#0             @ end string ?
+    add r2,r2,#1          @ increment index character
+    bne 1b                @ loop
+
+
+    ldr r0,iAdrszMessResult
+    bl affichageMess
+    ldr r0,iAdrsBuffer
+    bl affichageMess
+    ldr r0,iAdrszCarriageReturn
+    bl affichageMess
+    ldr r0,iAdrsBuffer1
+    bl affichageMess
+    ldr r0,iAdrszCarriageReturn
+    bl affichageMess
+100:                       @ standard end of the program
+    mov r0, #0             @ return code
+    mov r7, #EXIT          @ request to exit program
+    swi 0                  @ perform the system call
+iAdrszString:             .int szString
+iAdrsBuffer:              .int sBuffer
+iAdrsBuffer1:             .int sBuffer1
+iAdrszMessResult:         .int szMessResult
+iAdrszCarriageReturn:     .int szCarriageReturn
+iAdrszMessStart:          .int szMessStart
+/***************************************************/
+/*      ROUTINES INCLUDE                           */
+/***************************************************/
+/* for this file see task include a file in language ARM assembly*/
+.include "../affichage.inc"