w1.2: finish assignment1.2

assignment_assembly/assignment2/multiply.asm

@@ -5,14 +5,14 @@
 	.text
 	.thumb_func
 multiply:
-	MOVS.N	R2, #0
-	ADDS.N	R1, #0
-	BEQ.N	=exit
+	MOVS.N	R2, #0		// set result to 0
+	CMP.N	R1, #0
+	BEQ.N	exit		// goto exit if b == 0
 loop:
-	ADDS.N	R2, R0, R2
-	SUBS.N	R1, #1
-	BNE.N	=exit
-	B.N		=loop
+	ADDS.N	R2, R0, R2	// add a to result
+	SUBS.N	R1, #1		// substract 1 from b
+	BEQ.N	exit		// goto exit if b == 0
+	B.N		loop		// loop otherwise
 exit:
-	MOVS.N	R0, R2
+	MOVS.N	R0, R2		// move result to R0
 	BX.N	LR