w1.2: finish assignment1.2

assignment_assembly/assignment2/mulOne.c

@@ -0,0 +1,50 @@
+#include <stdio.h>
+
+unsigned int multiply(unsigned int a, unsigned int b);
+
+/**
+ * Multiplies two unsigned int values
+ * @param unsigned int a
+    The value of the multiplier a (0-4294967295)
+ * @param unsigned int b
+    The value of the multiplicand b (0-4294967295)
+ * @return unsigned int
+    The answer of a times b given that a * b < 4294967295
+ */
+
+// // This function must be implemented in LEGv7 Pinky assembly
+// unsigned int multiply(unsigned int a, unsigned int b)
+// {
+//     unsigned int m = 0;
+//     for (unsigned int i = 0; i != a; i++)
+//     {
+//         m = m + b;
+//     }
+//     return m;
+// }
+
+int main()
+{
+    extern void initialise_monitor_handles(void);
+    initialise_monitor_handles();
+
+    unsigned int a[] = {0, 1, 0, 1, 2000,      2,     10000,          1 ,      65535 };
+    unsigned int b[] = {0, 0, 1, 1,    2,  65535,     65535, 4294967295u,      65535 };
+    unsigned int r[] = {0, 0, 0, 1, 4000, 131070, 655350000, 4294967295u, 4294836225u};
+
+    for (size_t i = 0; i != sizeof(a)/sizeof(a[0]); i++)
+    {
+        printf("%u x %u: ", a[i], b[i]);
+        unsigned int result = multiply(a[i], b[i]);
+        unsigned int correct = r[i];
+        if (result != correct)
+        {
+            printf("Failed, function returned %u but the correct answer is %u\n", result, correct);
+        }
+        else
+        {
+            printf("Passed, %u\n", result);
+        }
+    }
+    return 0;
+}