Call a function: Difference between revisions
Content added Content deleted
(Added Fortress example.) |
(Add assembly arm Raspberry) |
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echo["Hello!"] |
echo["Hello!"] |
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time[]</lang> |
time[]</lang> |
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=={{header|ARM Assembly}}== |
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{{works with|as|Raspberry Pi}} |
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<lang ARM Assembly> |
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/* ARM assembly Raspberry PI */ |
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/* program callfonct.s */ |
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/* Constantes */ |
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.equ STDOUT, 1 |
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.equ WRITE, 4 |
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.equ EXIT, 1 |
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/***********************/ |
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/* Initialized data */ |
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/***********************/ |
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.data |
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szMessage: .asciz "Hello. \n" @ message |
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szRetourLigne: .asciz "\n" |
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szMessResult: .ascii "Resultat : " @ message result |
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sMessValeur: .fill 12, 1, ' ' |
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.asciz "\n" |
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/***********************/ |
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/* No Initialized data */ |
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/***********************/ |
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.bss |
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iValeur: .skip 4 @ reserve 4 bytes in memory |
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.text |
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.global main |
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main: |
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ldr r0,=szMessage @ adresse of message short program |
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bl affichageMess @ call function with 1 parameter (r0) |
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@ call function with parameters in register |
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mov r0,#5 |
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mov r1,#10 |
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bl fonction1 @ call function with 2 parameters (r0,r1) |
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ldr r1,=sMessValeur @ result in r0 |
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bl conversion10S @ call function with 2 parameter (r0,r1) |
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ldr r0,=szMessResult |
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bl affichageMess @ call function with 1 parameter (r0) |
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@ call function with parameters on stack |
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mov r0,#5 |
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mov r1,#10 |
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push {r0,r1} |
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bl fonction2 @ call function with 2 parameters on the stack |
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@ result in r0 |
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ldr r1,=sMessValeur |
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bl conversion10S @ call function with 2 parameter (r0,r1) |
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ldr r0,=szMessResult |
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bl affichageMess @ call function with 1 parameter (r0) |
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/* end of 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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swi 0 @ perform the system call |
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/******************************************************************/ |
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/* call function parameter in register */ |
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/******************************************************************/ |
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/* r0 value one */ |
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/* r1 value two */ |
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/* return in r0 */ |
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fonction1: |
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push {fp,lr} /* save des 2 registres */ |
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push {r1,r2} /* save des autres registres */ |
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mov r2,#20 |
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mul r0,r2 |
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add r0,r0,r1 |
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pop {r1,r2} /* restaur des autres registres */ |
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pop {fp,lr} /* restaur des 2 registres */ |
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bx lr /* retour procedure */ |
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/******************************************************************/ |
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/* call function parameter in the stack */ |
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/******************************************************************/ |
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/* return in r0 */ |
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fonction2: |
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push {fp,lr} /* save des 2 registres */ |
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add fp,sp,#8 /* address parameters in the stack*/ |
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push {r1,r2} /* save des autres registres */ |
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ldr r0,[fp] |
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ldr r1,[fp,#4] |
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mov r2,#-20 |
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mul r0,r2 |
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add r0,r0,r1 |
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pop {r1,r2} /* restaur des autres registres */ |
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pop {fp,lr} /* restaur des 2 registres */ |
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add sp,#8 /* very important, for stack aligned */ |
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bx lr /* retour procedure */ |
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/******************************************************************/ |
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/* affichage des messages avec calcul longueur */ |
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/******************************************************************/ |
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/* r0 contient l adresse du message */ |
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affichageMess: |
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push {fp,lr} /* save des 2 registres */ |
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push {r0,r1,r2,r7} /* save des autres registres */ |
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mov r2,#0 /* compteur longueur */ |
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1: /*calcul de la longueur */ |
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ldrb r1,[r0,r2] /* recup octet position debut + indice */ |
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cmp r1,#0 /* si 0 c est fini */ |
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beq 1f |
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add r2,r2,#1 /* sinon on ajoute 1 */ |
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b 1b |
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1: /* donc ici r2 contient la longueur du message */ |
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mov r1,r0 /* adresse du message en r1 */ |
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mov r0,#STDOUT /* code pour écrire sur la sortie standard Linux */ |
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mov r7, #WRITE /* code de l appel systeme 'write' */ |
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swi #0 /* appel systeme */ |
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pop {r0,r1,r2,r7} /* restaur des autres registres */ |
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pop {fp,lr} /* restaur des 2 registres */ |
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bx lr /* retour procedure */ |
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/***************************************************/ |
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/* conversion registre en décimal signé */ |
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/***************************************************/ |
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/* r0 contient le registre */ |
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/* r1 contient l adresse de la zone de conversion */ |
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conversion10S: |
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push {fp,lr} /* save des 2 registres frame et retour */ |
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push {r0-r5} /* save autres registres */ |
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mov r2,r1 /* debut zone stockage */ |
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mov r5,#'+' /* par defaut le signe est + */ |
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cmp r0,#0 /* nombre négatif ? */ |
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movlt r5,#'-' /* oui le signe est - */ |
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mvnlt r0,r0 /* et inversion en valeur positive */ |
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addlt r0,#1 |
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mov r4,#10 /* longueur de la zone */ |
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1: /* debut de boucle de conversion */ |
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bl divisionpar10 /* division */ |
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add r1,#48 /* ajout de 48 au reste pour conversion ascii */ |
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strb r1,[r2,r4] /* stockage du byte en début de zone r5 + la position r4 */ |
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sub r4,r4,#1 /* position précedente */ |
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cmp r0,#0 |
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bne 1b /* boucle si quotient different de zéro */ |
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strb r5,[r2,r4] /* stockage du signe à la position courante */ |
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subs r4,r4,#1 /* position précedente */ |
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blt 100f /* si r4 < 0 fin */ |
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/* sinon il faut completer le debut de la zone avec des blancs */ |
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mov r3,#' ' /* caractere espace */ |
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2: |
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strb r3,[r2,r4] /* stockage du byte */ |
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subs r4,r4,#1 /* position précedente */ |
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bge 2b /* boucle si r4 plus grand ou egal a zero */ |
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100: /* fin standard de la fonction */ |
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pop {r0-r5} /*restaur des autres registres */ |
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pop {fp,lr} /* restaur des 2 registres frame et retour */ |
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bx lr |
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/***************************************************/ |
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/* division par 10 signé */ |
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/* Thanks to http://thinkingeek.com/arm-assembler-raspberry-pi/* |
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/* and http://www.hackersdelight.org/ */ |
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/***************************************************/ |
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/* r0 contient le dividende */ |
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/* r0 retourne le quotient */ |
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/* r1 retourne le reste */ |
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divisionpar10: |
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/* r0 contains the argument to be divided by 10 */ |
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push {r2-r4} /* save autres registres */ |
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mov r4,r0 |
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ldr r3, .Ls_magic_number_10 /* r1 <- magic_number */ |
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smull r1, r2, r3, r0 /* r1 <- Lower32Bits(r1*r0). r2 <- Upper32Bits(r1*r0) */ |
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mov r2, r2, ASR #2 /* r2 <- r2 >> 2 */ |
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mov r1, r0, LSR #31 /* r1 <- r0 >> 31 */ |
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add r0, r2, r1 /* r0 <- r2 + r1 */ |
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add r2,r0,r0, lsl #2 /* r2 <- r0 * 5 */ |
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sub r1,r4,r2, lsl #1 /* r1 <- r4 - (r2 * 2) = r4 - (r0 * 10) */ |
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pop {r2-r4} |
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bx lr /* leave function */ |
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.align 4 |
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.Ls_magic_number_10: .word 0x66666667 |
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</lang> |
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=={{header|AutoHotkey}}== |
=={{header|AutoHotkey}}== |