feat: add exercise

Count number of ones in a number

1 files changed, 20 insertions, 0 deletions

diff --git a/I_anno/Architettura_Elaboratori/num_of_1s.asm b/I_anno/Architettura_Elaboratori/num_of_1s.asm
new file mode 100644
index 0000000..ffbd4f4
--- /dev/null
+++ b/I_anno/Architettura_Elaboratori/num_of_1s.asm
@@ -0,0 +1,20 @@
+num	dcd		27		; 0b11011
+		
+		mov		r0, #num
+		ldr		r0, [r0]
+		mov		r2, r0
+		
+		mov		r1, #32
+		
+loop
+		and		r4, r2, #1
+		cmp		r4, #1
+		bne		itszero
+		add		r3, r3, #1
+itszero
+		lsr			r2, r2, #1
+		sub		r1, r1, #1
+		cmp		r1, #0
+		bne		loop
+		
+		end