60 lines
2.5 KiB
Plaintext
60 lines
2.5 KiB
Plaintext
/* ARM assembly Raspberry PI */
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/* program variable.s */
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/************************************/
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/* Constantes Définition */
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/************************************/
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.equ STDOUT, 1 @ Linux output console
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.equ EXIT, 1 @ Linux syscall
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.equ WRITE, 4 @ Linux syscall
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/*********************************/
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/* Initialized data */
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/*********************************/
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.data
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szString: .asciz "String définition"
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sArea1: .fill 11, 1, ' ' @ 11 spaces
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@ or
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sArea2: .space 11,' ' @ 11 spaces
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cCharac: .byte '\n' @ character
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cByte1: .byte 0b10101 @ 1 byte binary value
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hHalfWord1: .hword 0xFF @ 2 bytes value hexa
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.align 4
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iInteger1: .int 123456 @ 4 bytes value decimal
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iInteger3: .short 0500 @ 4 bytes value octal
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iPointer1: .int 0x4000 @ 4 bytes value hexa
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@ or
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iPointer2: .word 0x4000 @ 4 bytes value hexa
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iPointer3: .int 04000 @ 4 bytes value octal
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TabInteger4: .int 5,4,3,2 @ Area of 4 integers = 4 * 4 = 16 bytes
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iDoubleInt1: .quad 0xFFFFFFFFFFFFFFFF @ 8 bytes
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dfFLOAT1: .double 0f-31415926535897932384626433832795028841971.693993751E-40 @ Float 8 bytes
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sfFLOAT2: .float 0f-31415926535897932384626433832795028841971.693993751E-40 @ Float 4 bytes (or use .single)
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/*********************************/
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/* UnInitialized data */
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/*********************************/
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.bss
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sBuffer: .skip 500 @ 500 bytes values zero
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iInteger2: .skip 4 @ 4 bytes value zero
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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,iAdriInteger2 @ load variable address
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mov r1,#100
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str r1,[r0] @ init variable iInteger2
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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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iAdriInteger2: .int iInteger2 @ variable address iInteger2
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