168 lines
5.8 KiB
Text
168 lines
5.8 KiB
Text
/* ARM assembly Raspberry PI */
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/* program proFactor.s */
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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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.equ STDOUT, 1 @ Linux output console
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.equ EXIT, 1 @ Linux syscall
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.equ WRITE, 4 @ Linux syscall
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/*******************************************/
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/* Initialized data */
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/*******************************************/
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.data
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szMessStartPgm: .asciz "Program start \n"
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szMessEndPgm: .asciz "Program normal end.\n"
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szMessError: .asciz "\033[31mError Allocation !!!\n"
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szCarriageReturn: .asciz "\n"
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/* datas message display */
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szMessEntete: .ascii "Number :"
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sNumber: .space 12,' '
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.asciz " Divisors :"
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szMessResult: .ascii " "
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sValue: .space 12,' '
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.asciz ""
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szMessDivNumber: .ascii "\nnumber divisors :"
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sCounter: .space 12,' '
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.asciz "\n"
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szMessNumberMax: .ascii "Number :"
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sNumberMax: .space 12,' '
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.ascii " has "
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sDivMax: .space 12, ' '
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.asciz " divisors\n"
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/*******************************************/
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/* UnInitialized data */
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/*******************************************/
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.bss
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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: @ program start
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ldr r0,iAdrszMessStartPgm @ display start message
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bl affichageMess
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mov r2,#1
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1:
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mov r0,r2 @ number
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ldr r1,iAdrsNumber @ and convert ascii string
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bl conversion10
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ldr r0,iAdrszMessEntete @ display result message
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bl affichageMess
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mov r0,r2 @ number
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mov r1,#1 @ display flag
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bl divisors @ display divisors
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ldr r1,iAdrsCounter @ and convert ascii string
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bl conversion10
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ldr r0,iAdrszMessDivNumber @ display result message
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bl affichageMess
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add r2,r2,#1
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cmp r2,#10
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ble 1b
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mov r2,#2
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mov r3,#0
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mov r4,#0
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ldr r5,iMaxi
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2:
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mov r0,r2
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mov r1,#0 @ display flag
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bl divisors @ display divisors
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cmp r0,r3
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movgt r3,r0
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movgt r4,r2
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add r2,r2,#1
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cmp r2,r5
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ble 2b
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mov r0,r4
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ldr r1,iAdrsNumberMax @ and convert ascii string
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bl conversion10
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mov r0,r3
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ldr r1,iAdrsDivMax @ and convert ascii string
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bl conversion10
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ldr r0,iAdrszMessNumberMax
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bl affichageMess
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ldr r0,iAdrszMessEndPgm @ display end message
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bl affichageMess
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b 100f
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99: @ display error message
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ldr r0,iAdrszMessError
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bl affichageMess
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100: @ standard end of the program
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mov r0, #0 @ return code
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mov r7, #EXIT @ request to exit program
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svc 0 @ perform system call
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iAdrszMessStartPgm: .int szMessStartPgm
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iAdrszMessEndPgm: .int szMessEndPgm
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iAdrszMessError: .int szMessError
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iAdrszCarriageReturn: .int szCarriageReturn
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iAdrszMessResult: .int szMessResult
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iAdrsValue: .int sValue
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iAdrszMessDivNumber: .int szMessDivNumber
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iAdrsCounter: .int sCounter
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iAdrszMessEntete: .int szMessEntete
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iAdrsNumber: .int sNumber
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iAdrszMessNumberMax: .int szMessNumberMax
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iAdrsDivMax: .int sDivMax
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iAdrsNumberMax: .int sNumberMax
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iMaxi: .int 20000
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/******************************************************************/
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/* divisors function */
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/******************************************************************/
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/* r0 contains the number */
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/* r1 contains display flag (<>0: display, 0: no display )
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/* r0 return divisors number */
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divisors:
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push {r1-r8,lr} @ save registers
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cmp r0,#1 @ = 1 ?
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movle r0,#0
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ble 100f
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mov r7,r0
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mov r8,r1
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cmp r8,#0
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beq 1f
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mov r0,#1 @ first divisor = 1
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ldr r1,iAdrsValue @ and convert ascii string
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bl conversion10
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ldr r0,iAdrszMessResult @ display result message
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bl affichageMess
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1: @ begin loop
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lsr r4,r7,#1 @ Maxi
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mov r6,r4 @ first divisor
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mov r5,#1 @ Counter divisors
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2:
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mov r0,r7 @ dividende = number
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mov r1,r6 @ divisor
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bl division
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cmp r3,#0 @ remainder = 0 ?
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bne 3f
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add r5,r5,#1 @ increment counter
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cmp r8,#0 @ display divisor ?
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beq 3f
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mov r0,r2 @ divisor
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ldr r1,iAdrsValue @ and convert ascii string
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bl conversion10
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ldr r0,iAdrszMessResult @ display result message
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bl affichageMess
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3:
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sub r6,r6,#1 @ decrement divisor
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cmp r6,#2 @ End ?
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bge 2b @ no loop
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mov r0,r5 @ return divisors number
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100:
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pop {r1-r8,lr} @ restaur registers
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bx lr @ return
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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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