Initial data commit
This commit is contained in:
Ingy döt Net
parent
72d218235f
commit
f23f22d71c
199087 changed files with 3378941 additions and 0 deletions
225
Task/File-input-output/ARM-Assembly/file-input-output.arm
Normal file
225
Task/File-input-output/ARM-Assembly/file-input-output.arm
Normal file
|
|
@ -0,0 +1,225 @@
|
|||
/* ARM assembly Raspberry PI */
|
||||
/* program readwrtfile.s */
|
||||
|
||||
/*********************************************/
|
||||
/*constantes */
|
||||
/********************************************/
|
||||
.equ STDOUT, 1 @ Linux output console
|
||||
.equ EXIT, 1 @ Linux syscall
|
||||
.equ READ, 3
|
||||
.equ WRITE, 4
|
||||
.equ OPEN, 5
|
||||
.equ CLOSE, 6
|
||||
.equ CREATE, 8
|
||||
/* file */
|
||||
.equ O_RDWR, 0x0002 @ open for reading and writing
|
||||
|
||||
.equ TAILLEBUF, 1000
|
||||
/*********************************/
|
||||
/* Initialized data */
|
||||
/*********************************/
|
||||
.data
|
||||
szMessErreur: .asciz "Erreur ouverture fichier input.\n"
|
||||
szMessErreur4: .asciz "Erreur création fichier output.\n"
|
||||
szMessErreur1: .asciz "Erreur fermeture fichier.\n"
|
||||
szMessErreur2: .asciz "Erreur lecture fichier.\n"
|
||||
szMessErreur3: .asciz "Erreur d'écriture dans fichier de sortie.\n"
|
||||
szRetourligne: .asciz "\n"
|
||||
szMessErr: .ascii "Error code : "
|
||||
sDeci: .space 15,' '
|
||||
.asciz "\n"
|
||||
|
||||
szNameFileInput: .asciz "input.txt"
|
||||
szNameFileOutput: .asciz "output.txt"
|
||||
|
||||
/*******************************************/
|
||||
/* DONNEES NON INITIALISEES */
|
||||
/*******************************************/
|
||||
.bss
|
||||
sBuffer: .skip TAILLEBUF
|
||||
|
||||
/**********************************************/
|
||||
/* -- Code section */
|
||||
/**********************************************/
|
||||
.text
|
||||
.global main
|
||||
main:
|
||||
push {fp,lr} /* save registers */
|
||||
|
||||
ldr r0,iAdrszNameFileInput @ file name
|
||||
mov r1,#O_RDWR @ flags
|
||||
mov r2,#0 @ mode
|
||||
mov r7,#OPEN @ call system OPEN
|
||||
swi #0
|
||||
cmp r0,#0 @ open error ?
|
||||
ble erreur
|
||||
mov r8,r0 @ save File Descriptor
|
||||
ldr r1,iAdrsBuffer @ buffer address
|
||||
mov r2,#TAILLEBUF @ buffer size
|
||||
mov r7, #READ @ call system READ
|
||||
swi 0
|
||||
cmp r0,#0 @ read error ?
|
||||
ble erreur2
|
||||
mov r2,r0 @ length read characters
|
||||
|
||||
/* close imput file */
|
||||
mov r0,r8 @ Fd
|
||||
mov r7, #CLOSE @ call system CLOSE
|
||||
swi 0
|
||||
cmp r0,#0 @ close error ?
|
||||
blt erreur1
|
||||
|
||||
@ create output file
|
||||
ldr r0,iAdrszNameFileOutput @ file name
|
||||
ldr r1,iFicMask1 @ flags
|
||||
mov r7, #CREATE @ call system create file
|
||||
swi 0
|
||||
cmp r0,#0 @ create error ?
|
||||
ble erreur4
|
||||
mov r0,r8 @ file descriptor
|
||||
ldr r1,iAdrsBuffer
|
||||
@ et r2 contains the length to write
|
||||
mov r7, #WRITE @ select system call 'write'
|
||||
swi #0 @ perform the system call
|
||||
cmp r0,#0 @ error write ?
|
||||
blt erreur3
|
||||
|
||||
@ close output file
|
||||
mov r0,r8 @ Fd fichier
|
||||
mov r7, #CLOSE @ call system CLOSE
|
||||
swi #0
|
||||
cmp r0,#0 @ error close ?
|
||||
blt erreur1
|
||||
mov r0,#0 @ return code OK
|
||||
b 100f
|
||||
erreur:
|
||||
ldr r1,iAdrszMessErreur
|
||||
bl afficheerreur
|
||||
mov r0,#1 @ error return code
|
||||
b 100f
|
||||
erreur1:
|
||||
ldr r1,iAdrszMessErreur1
|
||||
bl afficheerreur
|
||||
mov r0,#1 @ error return code
|
||||
b 100f
|
||||
erreur2:
|
||||
ldr r1,iAdrszMessErreur2
|
||||
bl afficheerreur
|
||||
mov r0,#1 @ error return code
|
||||
b 100f
|
||||
erreur3:
|
||||
ldr r1,iAdrszMessErreur3
|
||||
bl afficheerreur
|
||||
mov r0,#1 @ error return code
|
||||
b 100f
|
||||
erreur4:
|
||||
ldr r1,iAdrszMessErreur4
|
||||
bl afficheerreur
|
||||
mov r0,#1 @ error return code
|
||||
b 100f
|
||||
|
||||
100: @ end program
|
||||
pop {fp,lr} /* restaur des 2 registres */
|
||||
mov r7, #EXIT /* appel fonction systeme pour terminer */
|
||||
swi 0
|
||||
iAdrszNameFileInput: .int szNameFileInput
|
||||
iAdrszNameFileOutput: .int szNameFileOutput
|
||||
iAdrszMessErreur: .int szMessErreur
|
||||
iAdrszMessErreur1: .int szMessErreur1
|
||||
iAdrszMessErreur2: .int szMessErreur2
|
||||
iAdrszMessErreur3: .int szMessErreur3
|
||||
iAdrszMessErreur4: .int szMessErreur4
|
||||
iAdrsBuffer: .int sBuffer
|
||||
iFicMask1: .octa 0644
|
||||
/******************************************************************/
|
||||
/* display text with size calculation */
|
||||
/******************************************************************/
|
||||
/* r0 contains the address of the message */
|
||||
affichageMess:
|
||||
push {r0,r1,r2,r7,lr} /* save registres */
|
||||
mov r2,#0 /* counter length */
|
||||
1: /* loop length calculation */
|
||||
ldrb r1,[r0,r2] /* read octet start position + index */
|
||||
cmp r1,#0 /* if 0 its over */
|
||||
addne r2,r2,#1 /* else add 1 in the length */
|
||||
bne 1b /* and loop */
|
||||
/* so here r2 contains the length of the message */
|
||||
mov r1,r0 /* address message in r1 */
|
||||
mov r0,#STDOUT /* code to write to the standard output Linux */
|
||||
mov r7, #WRITE /* code call system "write" */
|
||||
swi #0 /* call systeme */
|
||||
pop {r0,r1,r2,r7,lr} /* restaur des 2 registres */
|
||||
bx lr /* return */
|
||||
/***************************************************/
|
||||
/* display error message */
|
||||
/***************************************************/
|
||||
/* r0 contains error code r1 address error message */
|
||||
afficheerreur:
|
||||
push {r1-r2,lr} @ save registers
|
||||
mov r2,r0 @ save error code
|
||||
mov r0,r1 @ address error message
|
||||
bl affichageMess @ display error message
|
||||
mov r0,r2 @ error code
|
||||
ldr r1,iAdrsDeci @ result address
|
||||
bl conversion10S
|
||||
ldr r0,iAdrszMessErr @ display error code
|
||||
bl affichageMess
|
||||
pop {r1-r2,lr} @ restaur registers
|
||||
bx lr @ return function
|
||||
iAdrszMessErr: .int szMessErr
|
||||
iAdrsDeci: .int sDeci
|
||||
|
||||
/***************************************************/
|
||||
/* Converting a register to a signed decimal */
|
||||
/***************************************************/
|
||||
/* r0 contains value and r1 area address */
|
||||
conversion10S:
|
||||
push {r0-r4,lr} @ save registers
|
||||
mov r2,r1 /* debut zone stockage */
|
||||
mov r3,#'+' /* par defaut le signe est + */
|
||||
cmp r0,#0 @ negative number ?
|
||||
movlt r3,#'-' @ yes
|
||||
mvnlt r0,r0 @ number inversion
|
||||
addlt r0,#1
|
||||
mov r4,#10 @ length area
|
||||
1: @ start loop
|
||||
bl divisionPar10R
|
||||
add r1,#48 @ digit
|
||||
strb r1,[r2,r4] @ store digit on area
|
||||
sub r4,r4,#1 @ previous position
|
||||
cmp r0,#0 @ stop if quotient = 0
|
||||
bne 1b
|
||||
|
||||
strb r3,[r2,r4] @ store signe
|
||||
subs r4,r4,#1 @ previous position
|
||||
blt 100f @ if r4 < 0 -> end
|
||||
|
||||
mov r1,#' ' @ space
|
||||
2:
|
||||
strb r1,[r2,r4] @store byte space
|
||||
subs r4,r4,#1 @ previous position
|
||||
bge 2b @ loop if r4 > 0
|
||||
100:
|
||||
pop {r0-r4,lr} @ restaur registers
|
||||
bx lr
|
||||
|
||||
/***************************************************/
|
||||
/* division for 10 fast unsigned */
|
||||
/***************************************************/
|
||||
@ r0 contient le dividende
|
||||
@ r0 retourne le quotient
|
||||
@ r1 retourne le reste
|
||||
divisionPar10R:
|
||||
push {r2,lr} @ save registers
|
||||
sub r1, r0, #10 @ calcul de r0 - 10
|
||||
sub r0, r0, r0, lsr #2 @ calcul de r0 - (r0 /4)
|
||||
add r0, r0, r0, lsr #4 @ calcul de (r0-(r0/4))+ ((r0-(r0/4))/16
|
||||
add r0, r0, r0, lsr #8 @ etc ...
|
||||
add r0, r0, r0, lsr #16
|
||||
mov r0, r0, lsr #3
|
||||
add r2, r0, r0, asl #2
|
||||
subs r1, r1, r2, asl #1 @ calcul (N-10) - (N/10)*10
|
||||
addpl r0, r0, #1 @ regul quotient
|
||||
addmi r1, r1, #10 @ regul reste
|
||||
pop {r2,lr}
|
||||
bx lr
|
||||
Loading…
Add table
Add a link
Reference in a new issue