112 lines
4.1 KiB
Text
112 lines
4.1 KiB
Text
/* ARM assembly Raspberry PI or android with termux */
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/* program antiprime.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, 20
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.equ MAXLINE, 5
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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 " @ "
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szCarriageReturn: .asciz "\n"
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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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/*********************************/
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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 r5,#0 @ maxi
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mov r6,#0 @ result counter
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mov r7,#0 @ display counter
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mov r4,#1 @ number begin
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1:
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mov r0,r4 @ number
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bl decFactor @ compute number factors
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cmp r0,r5 @ maxi ?
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addle r4,r4,#1 @ no -> increment indice
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ble 1b @ and loop
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mov r5,r0
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mov r0,r4
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bl displayResult
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add r7,r7,#1 @ increment display counter
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cmp r7,#MAXLINE @ line maxi ?
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blt 2f
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mov r7,#0
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ldr r0,iAdrszCarriageReturn
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bl affichageMess @ display message
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2:
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add r6,r6,#1 @ increment result counter
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add r4,r4,#1 @ increment number
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cmp r6,r3 @ end ?
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blt 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,lr} @ save registers
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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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bl affichageMess @ display message
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pop {r1,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,#0 @ init number factors
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mov r4,r0 @ save number
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mov r1,#1 @ 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,#1 @ increment counter factors
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cmp r1,r2 @ divisor = quotient ?
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beq 3f @ yes -> end
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add r5,r5,#1 @ no -> increment counter factors
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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 counter
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pop {r1-r5,pc} @ restaur registers
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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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