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calc.c
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float.c
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writeup.pdf
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//calc.c
//Calculator lab for COSC130
//Stephen Marz
//4 Sep 2017
//DO NOT MODIFY THIS CODE!
//Compile with calc.S
//aarch64-linux-gnu-gcc -o calc calc.c calc.S
#include <stdio.h>
//The following are the prototypes that you'll need to use
//Parameter 1 goes into register x0
//Parameter 2 goes into register x1
int Add(int left, int right);
int Sub(int left, int right);
int Mul(int left, int right);
int Div(int left, int right);
int ShiftLeft(int num, int amount);
int ShiftRight(int num, int amount);
int GetGlobal(int index);
void SetGlobal(int index, int value);
int main()
{
int result;
int left;
int right;
char command[5];
do {
printf("Enter command: ");
if (scanf("%5s", command) <= 0) {
printf("\n");
return 0;
}
switch (command[0]) {
case '+':
scanf("%d %d", &left, &right);
printf("%d + %d = %d\n", left, right, Add(left, right));
break;
case '-':
scanf("%d %d", &left, &right);
printf("%d - %d = %d\n", left, right, Sub(left, right));
break;
case '*':
scanf("%d %d", &left, &right);
printf("%d * %d = %d\n", left, right, Mul(left, right));
break;
case '/':
scanf("%d %d", &left, &right);
printf("%d / %d = %d\n", left, right, Div(left, right));
break;
case 'l':
scanf("%d %d", &left, &right);
printf("%d << %d = %d\n", left, right, ShiftLeft(left, right));
break;
case 'r':
scanf("%d %d", &left, &right);
printf("%d >> %d = %d\n", left, right, ShiftRight(left, right));
break;
case 'g':
scanf("%d", &left);
printf("Global %d = 0x%x\n", left, GetGlobal(left));
break;
case 's':
scanf("%d %d", &left, &right);
SetGlobal(left, right);
printf("Set global %d to 0x%x\n", left, right);
break;
case 'h':
printf("\n Commands:\n + A B Add A and B\n - A B Subtract B from A\n * A B Multiply A and B\n / A B Divide A by B\n l A B Shift A to the left B times\n r A B Shift A to the right B times\n g A Get the value of the global A\n s A B Set the value of the global A to B\n q Quit\n h Print this help\n");
break;
case 'q':
return 0;
default:
printf("Unknown command '%c' %d\n", command[0], (int)command[0]);
break;
}
} while (1);
return 0;
}