Final

cos235-hw04-pease-nicholas-0001/README

@@ -0,0 +1,17 @@
+COS235 HW4
+Nicholas Pease
+15 NOV 2024
+
+
+Description:
+
+This is a program that executes a recursive program to display some dots and ints on a screen.
+
+Execution:
+
+This program requires RARS (https://github.com/TheThirdOne/rars) and JDK.
+
+To execute the program with RARS, run the following command
+java -jar rars1_6.jar hw.s
+
+With rars1_6 being the current version of RARS and in the same directory as the file

cos235-hw04-pease-nicholas-0001/hw.s

@@ -1,3 +1,4 @@
+# COS235- HW4
 # Nicholas Pease
 # 31 OCT 2024
 .data:
@@ -7,22 +8,34 @@
 .text:
 main:
     li a7, 5 # input unsigned int (A)
+    la a0, inputUInt
     ecall
     mv a1, a0 # a1 = A
 
     li a7, 5 # input unsigned int (B)
+    la a0, inputUInt
     ecall
-    mv a2, a0 # a2 = B
+    mv a2, a0
+    # a2 = B
 
     # CALL RECURSIVE FUNCTION
-    jal ra, kapow
+    jal kapow
+    jal kapow
 
     # PRINT RETURN VALUE
-    mv a0, a0
+    li a7, 34
+    ecall
+
+    mv t0, a0
+    li a0, 9
+    li a7, 11
+    ecall
+    mv a0, t0
+
     li a7, 1
     ecall
 
-    jal ra, newline
+    jal newline
 
     li a7, 10
     ecall # Exit program
@@ -52,33 +65,36 @@ kapow:
         bne t0,a2,kapow_forLoop
     # END FOR LOOP
 
+    li a0, 32
+    li a7, 11
+    ecall
+
     li a7, 1 # print int
     mv a0, a2 # print Y
     ecall
 
-    jal ra, newline # print newline
+    jal newline # print newline
 
-    li t0, 1
+    li a0, 1
-    blt t0, a2, kapow_gt1 # if Y > 1, jump
+    blt a0, a2, kapow_gt1 # if Y > 1, jump
     blt zero, a2, kapow_gt0 # if Y > 0, jump
         # others y < 0
-        li a0, 1
         j kapow_return
 
     kapow_gt0:
-        mv a0, a1
+        mv a0, a1 # return X
         j kapow_return
 
     kapow_gt1:
         li t0, 2
         div a2,a2,t0 # Y = Y / 2
-        jal ra, kapow # recursive call
+        jal kapow # recursive call
         mv a3, a0 # a3 = first return value
         lw t1, 0(sp) # load original Y (t1)
         li t0, 2 # remainder number (t0)
         rem t0,t1,t0 # t0 = Y (t1) % 2 (t0)
         add a2, t0, a2# Y = prevY + y%2
-        jal ra, kapow
+        jal kapow
         mul a0, a3, a0 # return = x * y
 
     kapow_return:

hw.s

@@ -20,8 +20,18 @@ main:
 
     # CALL RECURSIVE FUNCTION
     jal kapow
+    jal kapow
 
     # PRINT RETURN VALUE
+    li a7, 34
+    ecall
+
+    mv t0, a0
+    li a0, 9
+    li a7, 11
+    ecall
+    mv a0, t0
+
     li a7, 1
     ecall
 
@@ -55,6 +65,10 @@ kapow:
         bne t0,a2,kapow_forLoop
     # END FOR LOOP
 
+    li a0, 32
+    li a7, 11
+    ecall
+
     li a7, 1 # print int
     mv a0, a2 # print Y
     ecall

input

@@ -1,2 +1,2 @@
-2
+15
-2
+15