Motorola DSP56000, 24-Bit Digital Signal Processor manual Logical Instructions

INSTRUCTION GROUPS

ABS	Absolute Value
ADC	Add Long with Carry
ADD	Addition
ADDL	Shift Left and Add
ADDR	Shift Right and Add
ASL	Arithmetic Shift Left
ASR	Arithmetic Shift Right
CLR	Clear an Operand
CMP	Compare
CMPM	Compare Magnitude
DEC*	Decrement by One
DIV*	Divide Iteration
INC*	Increment by One
MAC	Signed Multiply-Accumulate**
MACR	Signed Multiply-Accumulate and Round**
MPY	Signed Multiply**
MPYR	Signed Multiply and Round**
NEG	Negate Accumulator
NORM*	Normalize
RND	Round
SBC	Subtract Long with Carry
SUB	Subtract
SUBL	Shift Left and Subtract
SUBR	Shift Right and Subtract
Tcc*	Transfer Conditionally
TFR	Transfer Data ALU Register
TST	Test an Operand

6.4.2 Logical Instructions

The logical instructions execute in one instruction cycle and perform all of the logical oper- ations within the data ALU (except ANDI and ORI). They may affect all of the CCR bits and, like the arithmetic instructions, are register based.

Logical instructions are the only instructions that allow apparent duplicate destinations, such as:

AND X0,A X:(R0):A0

A logical instruction uses only the MSP portion of the A and B registers (A1 and B1).

*These instructions do not allow parallel data moves.

**Certain applications of these instructions do not allow parallel data moves.

MOTOROLA INSTRUCTION SET INTRODUCTION 6 - 23