Motorola DSP56000, 24-Bit Digital Signal Processor ABS B #$18,R1 Take absolute value of B, #$18R1

INSTRUCTION DESCRIPTIONS

I				Immediate Short Data Move
Example:		:
ABS B #$18,R1					;take absolute value of B, #$18➞R1
		:
				Before Execution			After Execution
							$0018
	R1
						R1
			$0000

I

Explanation of Example: Prior to execution, the 16-bit address register R1 contains the value $0000. The execution of the parallel move portion of the instruction, #$18,R1, moves the 8-bit immediate short operand into the eight LS bits of the R1 register and zeros the remaining eight MS bits of that register. The 8-bit value is interpreted as an unsigned integer since its destination is the R1 address register.

MOTOROLA INSTRUCTION SET DETAILS A - 165