453 lines
14 KiB
Text
453 lines
14 KiB
Text
/* ARM assembly Raspberry PI */
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/* program game24.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 STDIN, 0 @ Linux input console
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.equ READ, 3 @ Linux syscall
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.equ NBDIGITS, 4 @ digits number
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.equ TOTAL, 24
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.equ BUFFERSIZE, 100
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.equ STACKSIZE, 10 @ operator and digits number items in stacks
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/*********************************/
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/* Initialized data */
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/*********************************/
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.data
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szMessRules: .ascii "24 Game\n"
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.ascii "The program will display four randomly-generated \n"
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.ascii "single-digit numbers and will then prompt you to enter\n"
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.ascii "an arithmetic expression followed by <enter> to sum \n"
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.ascii "the given numbers to 24.\n"
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.asciz "Exemple : 9+8+3+4 or (7+5)+(3*4) \n\n"
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szMessExpr: .asciz "Enter your expression (or type (q)uit to exit or (n) for other digits): \n"
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//szMessErrChoise: .asciz "invalid choice.\n "
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szMessDigits: .asciz "The four digits are @ @ @ @ and the score is 24. \n"
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szMessNoDigit: .asciz "Error : One digit is not in digits list !! \n"
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szMessSameDigit: .asciz "Error : Two digits are same !! \n"
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szMessOK: .asciz "It is OK. \n"
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szMessNotOK: .asciz "Error, it is not ok total = @ \n"
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szMessErrOper: .asciz "Unknow Operator (+,-,$,/,(,)) \n"
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szMessNoparen: .asciz "no opening parenthesis !! \n"
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szMessErrParen: .asciz "Error parenthesis number !! \n"
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szMessNoalldigits: .asciz "One or more digits not used !!\n"
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szMessNewGame: .asciz "New game (y/n) ? \n"
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szCarriageReturn: .asciz "\n"
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.align 4
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iGraine: .int 123456
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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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sBuffer: .skip BUFFERSIZE
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iTabDigit: .skip 4 * NBDIGITS
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iTabTopDigit: .skip 4 * NBDIGITS
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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 r0,iAdrszMessRules @ display rules
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bl affichageMess
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1:
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mov r3,#0
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ldr r12,iAdriTabDigit
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ldr r11,iAdriTabTopDigit
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ldr r5,iAdrszMessDigits
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2: @ loop generate random digits
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mov r0,#8
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bl genereraleas
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add r0,r0,#1
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str r0,[r12,r3,lsl #2] @ store in table
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mov r1,#0
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str r1,[r11,r3,lsl #2] @ raz top table
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ldr r1,iAdrsZoneConv
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bl conversion10 @ call decimal conversion
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mov r2,#0
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strb r2,[r1,r0] @ reduce size display area with zéro final
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mov r0,r5
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ldr r1,iAdrsZoneConv @ insert conversion in message
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bl strInsertAtCharInc
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mov r5,r0
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add r3,r3,#1
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cmp r3,#NBDIGITS @ end ?
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blt 2b @ no -> loop
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mov r0,r5
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bl affichageMess
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3: @ loop human entry
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ldr r0,iAdrszMessExpr
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bl affichageMess
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bl saisie @ entry
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cmp r0,#'q'
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beq 100f
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cmp r0,#'Q'
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beq 100f
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cmp r0,#'n'
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beq 1b
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cmp r0,#'N'
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beq 1b
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bl evalExpr @ expression evaluation
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cmp r0,#0 @ ok ?
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bne 3b @ no - > loop
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10: @ display new game ?
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ldr r0,iAdrszCarriageReturn
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bl affichageMess
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ldr r0,iAdrszMessNewGame
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bl affichageMess
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bl saisie
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cmp r0,#'y'
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beq 1b
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cmp r0,#'Y'
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beq 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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iAdrszMessRules: .int szMessRules
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iAdrszMessDigits: .int szMessDigits
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iAdrszMessExpr: .int szMessExpr
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iAdrszMessNewGame: .int szMessNewGame
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iAdrsZoneConv: .int sZoneConv
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iAdriTabDigit: .int iTabDigit
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iAdriTabTopDigit: .int iTabTopDigit
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/******************************************************************/
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/* evaluation expression */
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/******************************************************************/
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/* r0 return 0 if ok -1 else */
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evalExpr:
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push {r1-r11,lr} @ save registers
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mov r0,#0
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ldr r1,iAdriTabTopDigit
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mov r2,#0
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1: @ loop init table top digits
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str r0,[r1,r2,lsl #2]
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add r2,r2,#1
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cmp r2,#NBDIGITS
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blt 1b
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sub sp,sp,#STACKSIZE * 4 @ stack operator
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mov fp,sp
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sub sp,sp,#STACKSIZE * 4 @ stack digit
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mov r1,sp
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ldr r10,iAdrsBuffer
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mov r8,#0 @ indice character in buffer
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mov r7,#0 @ indice digits stack
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mov r2,#0 @ indice operator stack
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1: @ begin loop
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ldrb r9,[r10,r8]
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cmp r9,#0xA @ end expression ?
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beq 90f
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cmp r9,#' ' @ space ?
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addeq r8,r8,#1 @ loop
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beq 1b
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cmp r9,#'(' @ left parenthesis -> store in operator stack
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streq r9,[fp,r2,lsl #2]
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addeq r2,r2,#1
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addeq r8,r8,#1 @ and loop
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beq 1b
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cmp r9,#')' @ right parenthesis ?
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bne 3f
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mov r0,fp @ compute operator stack until left parenthesis
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sub r2,r2,#1
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2:
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ldr r6,[fp,r2,lsl #2]
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cmp r6,#'(' @ left parenthesis
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addeq r8,r8,#1 @ end ?
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beq 1b @ and loop
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sub r7,r7,#1 @ last digit
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mov r3,r7
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bl compute
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sub r2,r2,#1
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cmp r2,#0
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bge 2b
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ldr r0,iAdrszMessNoparen @ no left parenthesis in stack
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bl affichageMess
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mov r0,#-1
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b 100f
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3:
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cmp r9,#'+' @ addition
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beq 4f
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cmp r9,#'-' @ soustraction
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beq 4f
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cmp r9,#'*' @ multiplication
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beq 4f
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cmp r9,#'/' @ division
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beq 4f
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b 5f @ not operator
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4: @ control priority and depile stacks
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mov r0,fp
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mov r3,r7
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mov r4,r9
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bl depileOper
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mov r7,r3
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add r8,r8,#1
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b 1b @ and loop
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5: @ digit
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sub r9,r9,#0x30
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mov r0,r9
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bl digitControl
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cmp r0,#0 @ error ?
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bne 100f
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str r9,[r1,r7,lsl #2] @ store digit in digits stack
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add r7,r7,#1
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add r8,r8,#1
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beq 1b
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b 100f
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90: @ compute all stack operators
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mov r0,fp
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sub r7,r7,#1
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91:
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subs r2,r2,#1
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blt 92f
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mov r3,r7
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bl compute
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sub r7,r7,#1
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b 91b
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92:
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ldr r0,[r1] @ total = first value on digits stack
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cmp r0,#TOTAL @ control total
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beq 93f @ ok
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ldr r1,iAdrsZoneConv
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bl conversion10 @ call decimal conversion
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mov r2,#0
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strb r2,[r1,r0]
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ldr r0,iAdrszMessNotOK
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ldr r1,iAdrsZoneConv @ insert conversion in message
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bl strInsertAtCharInc
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bl affichageMess
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mov r0,#-1
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b 100f
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93: @ control use all digits
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ldr r1,iAdriTabTopDigit
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mov r2,#0
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94: @ begin loop
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ldr r0,[r1,r2,lsl #2] @ load top
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cmp r0,#0
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bne 95f
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ldr r0,iAdrszMessNoalldigits
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bl affichageMess
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mov r0,#-1
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b 100f
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95:
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add r2,r2,#1
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cmp r2,#NBDIGITS
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blt 94b
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96: @ display message OK
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ldr r0,iAdrszMessOK
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bl affichageMess
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mov r0,#0
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b 100f
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100:
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add sp,sp,#80 @ stack algnement
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pop {r1-r11,lr}
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bx lr @ return
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iAdrszMessNoparen: .int szMessNoparen
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iAdrszMessNotOK: .int szMessNotOK
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iAdrszMessOK: .int szMessOK
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iAdrszMessNoalldigits: .int szMessNoalldigits
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/******************************************************************/
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/* depile operator */
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/******************************************************************/
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/* r0 operator stack address */
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/* r1 digits stack address */
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/* r2 operator indice */
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/* r3 digits indice */
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/* r4 operator */
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/* r2 return a new operator indice */
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/* r3 return a new digits indice */
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depileOper:
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push {r4-r8,lr} @ save registers
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cmp r2,#0 @ first operator ?
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beq 60f
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sub r5,r2,#1
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1:
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ldr r6,[r0,r5,lsl #2] @ load stack operator
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cmp r6,r4 @ same operators
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beq 50f
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cmp r6,#'*' @ multiplication
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beq 50f
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cmp r6,#'/' @ division
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beq 50f
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cmp r6,#'-' @ soustraction
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beq 50f
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b 60f
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50: @ depile operators stack and compute
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sub r2,r2,#1
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sub r3,r3,#1
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bl compute
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sub r5,r5,#1
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cmp r5,#0
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bge 1b
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60:
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str r4,[r0,r2,lsl #2] @ add operator in stack
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add r2,r2,#1
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100:
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pop {r4-r8,lr}
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bx lr @ return
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/******************************************************************/
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/* compute */
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/******************************************************************/
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/* r0 operator stack address */
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/* r1 digits stack address */
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/* r2 operator indice */
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/* r3 digits indice */
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compute:
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push {r1-r8,lr} @ save registers
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ldr r6,[r1,r3,lsl #2] @ load second digit
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sub r5,r3,#1
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ldr r7,[r1,r5,lsl #2] @ load first digit
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ldr r8,[r0,r2,lsl #2] @ load operator
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cmp r8,#'+'
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bne 1f
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add r7,r7,r6 @ addition
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str r7,[r1,r5,lsl #2]
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b 100f
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1:
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cmp r8,#'-'
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bne 2f
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sub r7,r7,r6 @ soustaction
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str r7,[r1,r5,lsl #2]
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b 100f
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2:
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cmp r8,#'*'
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bne 3f @ multiplication
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mul r7,r6,r7
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str r7,[r1,r5,lsl #2]
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b 100f
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3:
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cmp r8,#'/'
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bne 4f
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udiv r7,r7,r6 @ division
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str r7,[r1,r5,lsl #2]
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b 100f
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4:
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cmp r8,#'(' @ left parenthesis ?
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bne 5f
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ldr r0,iAdrszMessErrParen @ error
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bl affichageMess
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mov r0,#-1
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b 100f
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5:
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ldr r0,iAdrszMessErrOper
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bl affichageMess
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mov r0,#-1
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100:
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pop {r1-r8,lr}
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bx lr @ return
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iAdrszMessErrOper: .int szMessErrOper
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iAdrszMessErrParen: .int szMessErrParen
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/******************************************************************/
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/* control digits */
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/******************************************************************/
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/* r0 return 0 if OK 1 if not digit */
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digitControl:
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push {r1-r4,lr} @ save registers
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ldr r1,iAdriTabTopDigit
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ldr r2,iAdriTabDigit
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mov r3,#0
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1:
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ldr r4,[r2,r3,lsl #2] @ load digit
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cmp r0,r4 @ equal ?
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beq 2f @ yes
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add r3,r3,#1 @ no -> loop
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cmp r3,#NBDIGITS @ end ?
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blt 1b
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ldr r0,iAdrszMessNoDigit @ error
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bl affichageMess
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mov r0,#1
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b 100f
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2: @ control prev use
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ldr r4,[r1,r3,lsl #2]
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cmp r4,#0
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beq 3f
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add r3,r3,#1
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cmp r3,#NBDIGITS
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blt 1b
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ldr r0,iAdrszMessSameDigit
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bl affichageMess
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mov r0,#1
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b 100f
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3:
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mov r4,#1
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str r4,[r1,r3,lsl #2]
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mov r0,#0
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100:
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pop {r1-r4,lr}
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bx lr @ return
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iAdrszMessNoDigit: .int szMessNoDigit
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iAdrszMessSameDigit: .int szMessSameDigit
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/******************************************************************/
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/* string entry */
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/******************************************************************/
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/* r0 return the first character of human entry */
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saisie:
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push {r1-r7,lr} @ save registers
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mov r0,#STDIN @ Linux input console
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ldr r1,iAdrsBuffer @ buffer address
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mov r2,#BUFFERSIZE @ buffer size
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mov r7,#READ @ request to read datas
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svc 0 @ call system
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ldr r1,iAdrsBuffer @ buffer address
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ldrb r0,[r1] @ load first character
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100:
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pop {r1-r7,lr}
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bx lr @ return
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iAdrsBuffer: .int sBuffer
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/***************************************************/
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/* Generation random number */
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/***************************************************/
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/* r0 contains limit */
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genereraleas:
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push {r1-r4,lr} @ save registers
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ldr r4,iAdriGraine
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ldr r2,[r4]
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ldr r3,iNbDep1
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mul r2,r3,r2
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ldr r3,iNbDep2
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add r2,r2,r3
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str r2,[r4] @ maj de la graine pour l appel suivant
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cmp r0,#0
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beq 100f
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add r1,r0,#1 @ divisor
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mov r0,r2 @ dividende
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bl division
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mov r0,r3 @ résult = remainder
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100: @ end function
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pop {r1-r4,lr} @ restaur registers
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bx lr @ return
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/*****************************************************/
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iAdriGraine: .int iGraine
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iNbDep1: .int 0x343FD
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iNbDep2: .int 0x269EC3
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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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