ch7_exercises.adoc

Exercises

../support.adoc

1. Convert the exercises from chapter 5 to run with no pseudoinstructions (java -jar ~/rars_latest.jar np file.s on the command line).

2. Convert the following C code to RISC-V using a jump table (Note in C/C++ enum values start at 0 and go up by one unless the user manually assigns a value, in which case it continues counting up from there).

   enum { STATE0, STATE1, STATE2, STATE3, STATE14 = 14, STATE42 = 42, STATE43, STATE44 };
   
   
   int main()
   {
   	int num;
   	do {
   		printf("Enter a number between 0 and 50: ");
   		scanf("%d", &num);
   	} while (num < 0 || num > 50);
   
   	switch (num) {
   	case STATE0:
   		puts("Zilch");
   		break;
   	case STATE1:
   		puts("Uno");
   		break;
   	case STATE2:
   		puts("Dos");
   		break;
   	case STATE3:
   		puts("Tres");
   		break;
   	case STATE14:
   		puts("Catorce");
   	case STATE42:
   		puts("The answer to life, the universe, and everything.");
   	case STATE43:
   		puts("Off by one");
   	case STATE44:
   		puts("4 * 11?");
   		break;
   	}
   
   	puts("Thanks for playing!");
   
   
   	return 0;
   }