Motorola 24-Bit Digital Signal Processor, DSP56000 manual Immediate with Control Register

INSTRUCTION DESCRIPTIONS

	ANDI	AND Immediate with Control Register	ANDI
Operation:		Assembler Syntax:
	#xx • D➞D	AND(I) #xx,D

where • denotes the logical AND operator

Description: Logically AND the 8-bit immediate operand (#xx) with the contents of the destination control register D and store the result in the destination control register. The condition codes are affected only when the condition code register (CCR) is specified as the destination operand.

Restrictions: The ANDI #xx,MR instruction cannot be used immediately before an ENDDO or RTI instruction and cannot be one of the last three instructions in a DO loop (at LA-2, LA-1, or LA).

The ANDI #xx,CCR instruction cannot be used immediately before an RTI instruction.

Example:

:

AND #$FE,CCR ;clear carry bit C in cond. code register

:

CCR

Before Execution

$31

CCR

After Execution

$30

Explanation of Example: Prior to execution, the 8-bit condition code register (CCR) contains the value $31. The AND #$FE,CCR instruction logically ANDs the immediate 8- bit value $FE with the contents of the condition code register and stores the result in the condition code register.

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