RosettaCodeData/Task/ABC-problem/ARM-Assembly/abc-problem.arm

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/* ARM assembly Raspberry PI */
/* program problemABC.s */
/* REMARK 1 : this program use routines in a include file
see task Include a file language arm assembly
for the routine affichageMess conversion10
see at end of this program the instruction include */
/* for constantes see task include a file in arm assembly */
/************************************/
/* Constantes */
/************************************/
.include "../constantes.inc"
.equ TRUE, 1
.equ FALSE, 0
/*********************************/
/* Initialized data */
/*********************************/
.data
szMessTitre1: .asciz "Can_make_word: @ \n"
szMessTrue: .asciz "True.\n"
szMessFalse: .asciz "False.\n"
szCarriageReturn: .asciz "\n"
szTablBloc: .asciz "BO"
.asciz "XK"
.asciz "DQ"
.asciz "CP"
.asciz "NA"
.asciz "GT"
.asciz "RE"
.asciz "TG"
.asciz "QD"
.asciz "FS"
.asciz "JW"
.asciz "HU"
.asciz "VI"
.asciz "AN"
.asciz "OB"
.asciz "ER"
.asciz "FS"
.asciz "LY"
.asciz "PC"
.asciz "ZM"
.equ NBBLOC, (. - szTablBloc) / 3
szWord1: .asciz "A"
szWord2: .asciz "BARK"
szWord3: .asciz "BOOK"
szWord4: .asciz "TREAT"
szWord5: .asciz "COMMON"
szWord6: .asciz "SQUAD"
szWord7: .asciz "CONFUSE"
/*********************************/
/* UnInitialized data */
/*********************************/
.bss
.align 4
itabTopBloc: .skip 4 * NBBLOC
/*********************************/
/* code section */
/*********************************/
.text
.global main
main: @ entry of program
ldr r0,iAdrszWord1
bl traitBlock @ control word
ldr r0,iAdrszWord2
bl traitBlock @ control word
ldr r0,iAdrszWord3
bl traitBlock @ control word
ldr r0,iAdrszWord4
bl traitBlock @ control word
ldr r0,iAdrszWord5
bl traitBlock @ control word
ldr r0,iAdrszWord6
bl traitBlock @ control word
ldr r0,iAdrszWord7
bl traitBlock @ control word
100: @ standard end of the program
mov r0, #0 @ return code
mov r7, #EXIT @ request to exit program
svc #0 @ perform the system call
iAdrszCarriageReturn: .int szCarriageReturn
iAdrszWord1: .int szWord1
iAdrszWord2: .int szWord2
iAdrszWord3: .int szWord3
iAdrszWord4: .int szWord4
iAdrszWord5: .int szWord5
iAdrszWord6: .int szWord6
iAdrszWord7: .int szWord7
/******************************************************************/
/* traitement */
/******************************************************************/
/* r0 contains word */
traitBlock:
push {r1,lr} @ save registers
mov r1,r0
ldr r0,iAdrszMessTitre1 @ insertion word in message
bl strInsertAtCharInc
bl affichageMess @ display title message
mov r0,r1
bl controlBlock @ control
cmp r0,#TRUE @ ok ?
bne 1f
ldr r0,iAdrszMessTrue @ yes
bl affichageMess
b 100f
1: @ no
ldr r0,iAdrszMessFalse
bl affichageMess
100:
pop {r1,lr}
bx lr @ return
iAdrszMessTitre1: .int szMessTitre1
iAdrszMessFalse: .int szMessFalse
iAdrszMessTrue: .int szMessTrue
/******************************************************************/
/* control if letters are in block */
/******************************************************************/
/* r0 contains word */
controlBlock:
push {r1-r9,lr} @ save registers
mov r5,r0 @ save word address
ldr r4,iAdritabTopBloc
ldr r6,iAdrszTablBloc
mov r2,#0
mov r3,#0
1: @ init table top block used
str r3,[r4,r2,lsl #2]
add r2,r2,#1
cmp r2,#NBBLOC
blt 1b
mov r2,#0
2: @ loop to load letters
ldrb r3,[r5,r2]
cmp r3,#0
beq 10f @ end
and r3,r3,#0xDF @ transform in capital letter
mov r8,#0
3: @ begin loop control block
ldr r7,[r4,r8,lsl #2] @ block already used ?
cmp r7,#0
bne 5f @ yes
add r9,r8,r8,lsl #1 @ no -> index * 3
ldrb r7,[r6,r9] @ first block letter
cmp r3,r7 @ equal ?
beq 4f
add r9,r9,#1
ldrb r7,[r6,r9] @ second block letter
cmp r3,r7 @ equal ?
beq 4f
b 5f
4:
mov r7,#1 @ top block
str r7,[r4,r8,lsl #2] @ block used
add r2,r2,#1
b 2b @ next letter
5:
add r8,r8,#1
cmp r8,#NBBLOC
blt 3b
mov r0,#FALSE @ no letter find on block -> false
b 100f
10: @ all letters are ok
mov r0,#TRUE
100:
pop {r1-r9,lr}
bx lr @ return
iAdritabTopBloc: .int itabTopBloc
iAdrszTablBloc: .int szTablBloc
/***************************************************/
/* ROUTINES INCLUDE */
/***************************************************/
.include "../affichage.inc"