100 lines
2.8 KiB
Plaintext
100 lines
2.8 KiB
Plaintext
/* ARM assembly Raspberry PI */
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/* program Strip comments from a string */
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/* REMARK 1 : this program use routines in a include file
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see task Include a file language arm assembly
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for the routine affichageMess conversion10
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see at end of this program the instruction include */
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/*******************************************/
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/* Constantes */
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/*******************************************/
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.include "../constantes.inc"
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/*******************************************/
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/* macros */
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/*******************************************/
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//.include "../../ficmacros32.inc" @ for developper debugging
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/*********************************/
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/* Initialized data */
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/*********************************/
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.data
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szMessDebutPgm: .asciz "Program 32 bits start. \n"
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szCarriageReturn: .asciz "\n"
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szMessFinOK: .asciz "Program normal end. \n"
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szString1: .asciz "apples, pears # and bananas"
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szString2: .asciz "apples, pears ; and bananas"
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.align 4
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/*********************************/
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/* UnInitialized data */
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/*********************************/
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.bss
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.align 4
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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:
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ldr r0,iAdrszMessDebutPgm
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bl affichageMess @ start message
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ldr r0,iAdrszString1
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mov r1,#'#'
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bl suppComment
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ldr r0,iAdrszString1
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bl affichageMess
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ldr r0,iAdrszCarriageReturn
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bl affichageMess
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ldr r0,iAdrszString2
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mov r1,#';'
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bl suppComment
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ldr r0,iAdrszString1
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bl affichageMess
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ldr r0,iAdrszCarriageReturn
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bl affichageMess
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ldr r0,iAdrszMessFinOK
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bl affichageMess
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100:
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mov r7,#EXIT @ program end
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svc #0 @ system call
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iAdrszMessDebutPgm: .int szMessDebutPgm
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iAdrszMessFinOK: .int szMessFinOK
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iAdrszCarriageReturn: .int szCarriageReturn
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iAdrszString1: .int szString1
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iAdrszString2: .int szString2
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/******************************************************************/
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/* strip comment string */
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/******************************************************************/
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/* r0 contains string address */
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/* r1 contains comment markers */
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/* r0 returns length of string */
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suppComment:
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push {r1-r3,lr} @ save registers
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mov r2,#0 @ indice string
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1:
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ldrb r3,[r0,r2]
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cmp r3,#0 @ end string
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moveq r0,r2
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beq 100f
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cmp r3,r1
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addne r2,r2,#1
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bne 1b
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mov r3,#0
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strb r3,[r0,r2]
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mov r0,r2
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100:
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pop {r1-r3,pc}
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/***************************************************/
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/* ROUTINES INCLUDE */
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/***************************************************/
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.include "../affichage.inc"
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