120 lines
3.4 KiB
Plaintext
120 lines
3.4 KiB
Plaintext
/* ARM assembly Raspberry PI or android 32 bits */
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/* program ackermann.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 MMAXI, 4
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.equ NMAXI, 10
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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 "Result for @ @ : @ \n"
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szMessError: .asciz "Overflow !!.\n"
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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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mov r3,#0
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mov r4,#0
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1:
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mov r0,r3
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mov r1,r4
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bl ackermann
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mov r5,r0
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mov r0,r3
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ldr r1,iAdrsZoneConv @ else display odd message
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bl conversion10 @ call decimal conversion
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ldr r0,iAdrsMessResult
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ldr r1,iAdrsZoneConv @ insert value conversion in message
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bl strInsertAtCharInc
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mov r6,r0
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mov r0,r4
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ldr r1,iAdrsZoneConv @ else display odd message
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bl conversion10 @ call decimal conversion
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mov r0,r6
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ldr r1,iAdrsZoneConv @ insert value conversion in message
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bl strInsertAtCharInc
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mov r6,r0
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mov r0,r5
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ldr r1,iAdrsZoneConv @ else display odd message
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bl conversion10 @ call decimal conversion
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mov r0,r6
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ldr r1,iAdrsZoneConv @ insert value conversion in message
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bl strInsertAtCharInc
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bl affichageMess
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add r4,#1
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cmp r4,#NMAXI
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blt 1b
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mov r4,#0
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add r3,#1
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cmp r3,#MMAXI
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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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iAdrsMessResult: .int sMessResult
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iAdrsZoneConv: .int sZoneConv
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/***************************************************/
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/* fonction ackermann */
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/***************************************************/
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// r0 contains a number m
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// r1 contains a number n
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// r0 return résult
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ackermann:
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push {r1-r2,lr} @ save registers
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cmp r0,#0
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beq 5f
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movlt r0,#-1 @ error
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blt 100f
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cmp r1,#0
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movlt r0,#-1 @ error
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blt 100f
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bgt 1f
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sub r0,r0,#1
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mov r1,#1
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bl ackermann
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b 100f
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1:
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mov r2,r0
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sub r1,r1,#1
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bl ackermann
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mov r1,r0
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sub r0,r2,#1
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bl ackermann
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b 100f
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5:
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adds r0,r1,#1
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bcc 100f
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ldr r0,iAdrszMessError
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bl affichageMess
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bkpt
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100:
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pop {r1-r2,lr} @ restaur registers
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bx lr @ return
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iAdrszMessError: .int szMessError
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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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