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23SCR/SCR019-ARM/SCR019.txt

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+I/
+1.
+2.
+3.
+4.
+II/
+1.
+2.
+3.
+III/

23SCR/SCR019-ARM/mult-bin-loop.s

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+.equ SYS_EXIT,93
+.data
+int1: .word 0xa2
+int2: .word 0xb
+.text
+.globl _start
+_start:
+
+adr x5,int1
+ldr w1,[x5]
+uxtw x1,w1 // int1 is in x1
+
+adr x6,int2
+ldr w2,[x6]
+uxtw x2, w2// int2 is in x2
+
+mov x0,#0 // result is in x0
+
+loop:
+cbz x2,exit
+tbz x2,#0,next
+add x0,x0,x2
+next: 
+lsl x1,x1,#1
+lsr x2,x2,#1
+b loop
+exit: mov x0,#0
+mov w8,#SYS_EXIT
+svc #0x0
+.end

23SCR/SCR019-ARM/small-loop.s

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+.equ SYS_EXIT,93
+.data
+int: .word 12
+.text
+.globl _start
+_start:	adr x5, int
+		ldr w0,[25]
+		mov w1,#1
+		mov w2,#0
+		kfc : cmp w1,w0
+		b.gt suite
+		add w2,w2,w1
+		add w1,w1,#1
+		b kfc
+		suite : mov x0,x2
+		mov w8,#SYS_EXIT
+		svc #0
+.end