From d8dd8f916b1e6ca9756a0643c7a0d4cd3461e92c Mon Sep 17 00:00:00 2001
From: Santo Cariotti <dcariotti24@gmail.com>
Date: Mon, 8 Jun 2020 19:55:38 +0200
Subject: feat: add exercise

Count number of ones in a number
---
 I_anno/Architettura_Elaboratori/num_of_1s.asm | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 I_anno/Architettura_Elaboratori/num_of_1s.asm

(limited to 'I_anno')

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
-- 
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