159 lines
5.1 KiB
Plaintext
159 lines
5.1 KiB
Plaintext
/* ARM assembly Raspberry PI */
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/* program binarydigit.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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/* Initialized data */
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.data
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szMessResultAnd: .asciz "Result of And : \n"
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szMessResultOr: .asciz "Result of Or : \n"
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szMessResultEor: .asciz "Result of Exclusif Or : \n"
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szMessResultNot: .asciz "Result of Not : \n"
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szMessResultLsl: .asciz "Result of left shift : \n"
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szMessResultLsr: .asciz "Result of right shift : \n"
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szMessResultAsr: .asciz "Result of Arithmetic right shift : \n"
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szMessResultRor: .asciz "Result of rotate right : \n"
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szMessResultRrx: .asciz "Result of rotate right with extend : \n"
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szMessResultClear: .asciz "Result of Bit Clear : \n"
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sMessAffBin: .ascii "Register value : "
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sZoneBin: .space 36,' '
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.asciz "\n"
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/* code section */
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.text
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.global main
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main: /* entry of program */
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push {fp,lr} /* save des 2 registres */
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ldr r0,iAdrszMessResultAnd
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bl affichageMess
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mov r0,#5
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and r0,#15
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bl affichage2
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ldr r0,iAdrszMessResultOr
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bl affichageMess
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mov r0,#5
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orr r0,#15
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bl affichage2
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ldr r0,iAdrszMessResultEor
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bl affichageMess
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mov r0,#5
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eor r0,#15
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bl affichage2
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ldr r0,iAdrszMessResultNot
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bl affichageMess
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mov r0,#5
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mvn r0,r0
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bl affichage2
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ldr r0,iAdrszMessResultLsl
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bl affichageMess
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mov r0,#5
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lsl r0,#1
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bl affichage2
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ldr r0,iAdrszMessResultLsr
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bl affichageMess
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mov r0,#5
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lsr r0,#1
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bl affichage2
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ldr r0,iAdrszMessResultAsr
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bl affichageMess
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mov r0,#-5
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bl affichage2
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mov r0,#-5
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asr r0,#1
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bl affichage2
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ldr r0,iAdrszMessResultRor
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bl affichageMess
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mov r0,#5
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ror r0,#1
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bl affichage2
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ldr r0,iAdrszMessResultRrx
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bl affichageMess
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mov r0,#5
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mov r1,#15
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rrx r0,r1
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bl affichage2
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ldr r0,iAdrszMessResultClear
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bl affichageMess
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mov r0,#5
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bic r0,#0b100 @ clear 3ieme bit
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bl affichage2
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bic r0,#4 @ clear 3ieme bit ( 4 = 100 binary)
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bl affichage2
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100: /* standard end of the program */
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mov r0, #0 @ return code
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pop {fp,lr} @restaur 2 registers
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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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iAdrszMessResultAnd: .int szMessResultAnd
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iAdrszMessResultOr: .int szMessResultOr
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iAdrszMessResultEor: .int szMessResultEor
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iAdrszMessResultNot: .int szMessResultNot
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iAdrszMessResultLsl: .int szMessResultLsl
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iAdrszMessResultLsr: .int szMessResultLsr
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iAdrszMessResultAsr: .int szMessResultAsr
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iAdrszMessResultRor: .int szMessResultRor
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iAdrszMessResultRrx: .int szMessResultRrx
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iAdrszMessResultClear: .int szMessResultClear
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/******************************************************************/
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/* register display in binary */
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/******************************************************************/
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/* r0 contains the register */
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affichage2:
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push {r0,lr} /* save registers */
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push {r1-r5} /* save others registers */
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mrs r5,cpsr /* saves state register in r5 */
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ldr r1,iAdrsZoneBin
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mov r2,#0 @ read bit position counter
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mov r3,#0 @ position counter of the written character
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1: @ loop
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lsls r0,#1 @ left shift with flags
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movcc r4,#48 @ flag carry off character '0'
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movcs r4,#49 @ flag carry on character '1'
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strb r4,[r1,r3] @ character -> display zone
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add r2,r2,#1 @ + 1 read bit position counter
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add r3,r3,#1 @ + 1 position counter of the written character
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cmp r2,#8 @ 8 bits read
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addeq r3,r3,#1 @ + 1 position counter of the written character
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cmp r2,#16 @ etc
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addeq r3,r3,#1
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cmp r2,#24
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addeq r3,r3,#1
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cmp r2,#31 @ 32 bits shifted ?
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ble 1b @ no -> loop
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ldr r0,iAdrsZoneMessBin @ address of message result
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bl affichageMess @ display result
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100:
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msr cpsr,r5 /*restaur state register */
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pop {r1-r5} /* restaur others registers */
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pop {r0,lr}
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bx lr
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iAdrsZoneBin: .int sZoneBin
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iAdrsZoneMessBin: .int sMessAffBin
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/******************************************************************/
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/* display text with size calculation */
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/******************************************************************/
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/* r0 contains the address of the message */
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affichageMess:
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push {fp,lr} /* save registres */
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push {r0,r1,r2,r7} /* save others registres */
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mov r2,#0 /* counter length */
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1: /* loop length calculation */
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ldrb r1,[r0,r2] /* read octet start position + index */
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cmp r1,#0 /* if 0 its over */
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addne r2,r2,#1 /* else add 1 in the length */
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bne 1b /* and loop */
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/* so here r2 contains the length of the message */
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mov r1,r0 /* address message in r1 */
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mov r0,#STDOUT /* code to write to the standard output Linux */
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mov r7, #WRITE /* code call system write */
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swi #0 /* call systeme */
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pop {r0,r1,r2,r7} /* restaur others registres */
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pop {fp,lr} /* restaur des 2 registres */
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bx lr /* return */
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