MIPS: instruction example
	Example: add unsigned
		addu    $r10,$r8,$r9  # add 2 numbers
		Syntax
			3-operand instructions: all arithmetic/logical operations
				operands separated by commas
				Design principle #1: "Simplicity favors regularity."
			operation:		addu
				one operation per instruction
				one instruction per line
			registers
				source:		$r8, $r9
				target:		$r10
			comment:		# add 2 numbers
				starts with #, ends with end of line
		Semantics
			$r10 = $r8 + $r9;
			alternative notation:
			R[10] <-- R[8] + R[9]
		Machine code
			hex:	0x01095021