*

arm/add-int.s

@@ -0,0 +1,15 @@
+.equ SYS_EXIT, 93
+.data
+int1 : .quad 0x15
+int2 : .quad 0x2
+.text
+.global _start
+
+_start: adr x3, int1
+	ldr x0, [x3]
+	adr x3, int2
+	ldr x1, [x3]
+	add x2,x0,x1
+	mov x0, #0
+	mov w8, #SYS_EXIT
+	svc #0

arm/adds-int32.s

@@ -0,0 +1,16 @@
+.equ SYS_EXIT, 93
+.data
+int1 : .word 0x7fffffff
+int2 : .word 0x1
+.text
+.global _start
+
+_start: adr x3, int1
+	ldr w0, [x3]
+	adr x3, int2
+	ldr w1, [x3]
+	adds w2,w0,w1
+	mrs x4, nzcv
+	mov w0, #0
+	mov w8, #SYS_EXIT
+	svc #0

arm/barrel-experiment.s

@@ -0,0 +1,14 @@
+.equ SYS_EXIT, 93
+
+.data
+.text
+.globl _start
+
+_start :
+	mov x0, #15
+	add x1,x0,x0,lsl #4 //x0 * 16 + x0
+	mov x2, #1
+	sub x1,xzr,x2, lsl #3 // 0 - 8
+	mov w8, #SYS_EXIT
+	svc #0
+

arm/mult-bin-loop.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(){
+	unsigned int a = 0xa2;
+	unsigned int b = 0xb;
+	unsigned long long int res = 0;
+	unsigned long long int extra = (unsigned long long int) a;
+	while (b) {
+		if (b & 0x1) res += extra;
+		extra = extra << 1;
+		b = b >> 1;
+	}
+	exit(0);
+}
+

arm/mult-bin-loop.s

@@ -0,0 +1,28 @@
+	.equ SYS_EXIT,93
+	.data
+int1: .word 0xa2
+int2: .word 0xb
+	.text
+	.globl _start
+_start:
+	adr x1, int1
+	ldr w0, [x1]
+	uxtw x1, w0 // int1 is in x1
+	adr x2, int2
+	ldr w3, [x2]
+	uxtw x2, w3 // int2 is in x2
+	mov x0, #0 // result is in x0
+loop: 
+	cbz x2, exit
+	tbz x2, #0, next
+	add x0, x2, #0 
+next: 
+	lsl x2, x2, #1
+	lsr x1, x1, #1
+	b loop
+
+exit: 	mov x0,#0
+      	mov w8,#SYS_EXIT
+      	svc #0x0
+
+	.end

arm/notes.txt

@@ -0,0 +1,3 @@
+cmp = subs sans sauvegarde résultat
+0111 + 0001 
+tst = 

arm/printHW.s

@@ -0,0 +1,24 @@
+/*
+Lines enclosed here are comments
+A small program: prints "Hello World!"
+*/
+// From // to the end of this line is a comment: next are directives to the assembler
+.equ SYS_EXIT, 93
+.equ SYS_WRITE, 64
+.data // tells assembler to assemble the following in the data section
+msg: .asciz "Hello World!\n" //msg retains the address of the string
+.text // tells assembler to assemble the following
+// in the text (code) section
+.globl _start // _start is there where the program starts,
+// .globl makes it visible to the linker
+_start:
+mov x0,#1 // value 1 is placed in register x0
+adr x1,msg // the address retained by label msg is placed in register x1
+mov x2,#13
+mov w8, #SYS_WRITE // svc must find the syscall number in w8
+// and the syscall arguments in x0,x1,x2
+svc #0 // invoke syscall: displays on the screen
+mov x0, #0 // in x0 put the value you want to exit with
+mov w8,#SYS_EXIT
+svc #0
+.end

arm/shift-experiment.s

@@ -0,0 +1,18 @@
+.equ SYS_EXIT, 93
+
+.data 
+.text
+	int: .quad 0x8000000000000000
+.globl _start
+
+_start :
+	mov x0, #1
+	lsl x1, x0, #3
+	lsr x2, x0, #1
+	adr x6, int
+	ldr x3,[x6]
+	lsr x4, x3, #3
+	asr x5, x3, #3
+	mov w8, #SYS_EXIT
+	svc #0 
+

arm/w-vs-x-and-extension.s

@@ -0,0 +1,16 @@
+.equ SYS_EXIT, 93
+
+.data
+	int: .quad 0x11223344aabbccdd
+	int32: .word 0x887766ee
+.text
+.globl _start
+_start:
+	adr x1, int
+	ldr x0,[x1]
+	adr x1, int32
+	ldr w0,[x1] //Le registre x0 est vidé pour ne contenir seulement la valeur int32
+	sxtw x0, w0
+	mov x0, #0
+	mov w8, #SYS_EXIT
+	svc #0