151 lines
5.4 KiB
Text
151 lines
5.4 KiB
Text
/* ARM assembly Raspberry PI or android with termux */
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/* program amicable.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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/* for constantes see task include a file in arm assembly */
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/************************************/
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/* Constantes */
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/************************************/
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.include "../constantes.inc"
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.equ NMAXI, 20000
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.equ TABMAXI, 100
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/*********************************/
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/* Initialized data */
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/*********************************/
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.data
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sMessResult: .asciz " @ : @\n"
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szCarriageReturn: .asciz "\n"
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szMessErr1: .asciz "Array too small !!"
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/*********************************/
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/* UnInitialized data */
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/*********************************/
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.bss
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sZoneConv: .skip 24
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tResult: .skip 4 * TABMAXI
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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: @ entry of program
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ldr r3,iNMaxi @ load limit
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mov r4,#2 @ number begin
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1:
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mov r0,r4 @ number
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bl decFactor @ compute sum factors
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cmp r0,r4 @ equal ?
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beq 2f
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mov r2,r0 @ factor sum 1
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bl decFactor
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cmp r0,r4 @ equal number ?
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bne 2f
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mov r0,r4 @ yes -> search in array
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mov r1,r2 @ and store sum
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bl searchRes
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cmp r0,#0 @ find ?
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bne 2f @ yes
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mov r0,r4 @ no -> display number ans sum
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mov r1,r2
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bl displayResult
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2:
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add r4,#1 @ increment number
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cmp r4,r3 @ end ?
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ble 1b
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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 the system call
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iAdrszCarriageReturn: .int szCarriageReturn
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iNMaxi: .int NMAXI
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/***************************************************/
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/* display message number */
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/***************************************************/
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/* r0 contains number 1 */
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/* r1 contains number 2 */
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displayResult:
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push {r1-r3,lr} @ save registers
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mov r2,r1
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ldr r1,iAdrsZoneConv
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bl conversion10 @ call décimal conversion
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ldr r0,iAdrsMessResult
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ldr r1,iAdrsZoneConv @ insert conversion in message
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bl strInsertAtCharInc
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mov r3,r0
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mov r0,r2
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ldr r1,iAdrsZoneConv
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bl conversion10 @ call décimal conversion
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mov r0,r3
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ldr r1,iAdrsZoneConv @ insert conversion in message
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bl strInsertAtCharInc
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bl affichageMess @ display message
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pop {r1-r3,pc} @ restaur des registres
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iAdrsMessResult: .int sMessResult
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iAdrsZoneConv: .int sZoneConv
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/***************************************************/
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/* compute factors sum */
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/***************************************************/
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/* r0 contains the number */
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decFactor:
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push {r1-r5,lr} @ save registers
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mov r5,#1 @ init sum
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mov r4,r0 @ save number
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mov r1,#2 @ start factor -> divisor
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1:
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mov r0,r4 @ dividende
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bl division
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cmp r1,r2 @ divisor > quotient ?
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bgt 3f
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cmp r3,#0 @ remainder = 0 ?
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bne 2f
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add r5,r5,r1 @ add divisor to sum
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cmp r1,r2 @ divisor = quotient ?
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beq 3f @ yes -> end
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add r5,r5,r2 @ no -> add quotient to sum
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2:
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add r1,r1,#1 @ increment factor
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b 1b @ and loop
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3:
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mov r0,r5 @ return sum
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pop {r1-r5,pc} @ restaur registers
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/***************************************************/
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/* search and store result in array */
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/***************************************************/
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/* r0 contains the number */
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/* r1 contains factors sum */
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/* r0 return 1 if find 0 else -1 if error */
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searchRes:
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push {r1-r4,lr} @ save registers
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ldr r4,iAdrtResult @ array address
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mov r2,#0 @ indice begin
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1:
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ldr r3,[r4,r2,lsl #2] @ load one result array
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cmp r3,#0 @ if 0 store new result
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beq 2f
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cmp r3,r0 @ equal ?
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moveq r0,#1 @ find -> return 1
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beq 100f
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add r2,r2,#1 @ increment indice
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cmp r2,#TABMAXI @ maxi array ?
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blt 1b
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ldr r0,iAdrszMessErr1 @ error
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bl affichageMess
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mov r0,#-1
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b 100f
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2:
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str r1,[r4,r2,lsl #2]
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mov r0,#0 @ not find -> store and retun 0
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100:
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pop {r1-r4,pc} @ restaur registers
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iAdrtResult: .int tResult
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iAdrszMessErr1: .int szMessErr1
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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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