Motorola 24-Bit Digital Signal Processor, DSP56000 manual Yea,D #xxxxxx,D

INSTRUCTION DESCRIPTIONS

Y: Y Memory Data Move Y:

Note: The MOVE A,Y:ea operation will result in a 24-bit positive or negative saturation constant being stored in the specified 24-bit Y memory location if the signed integer por- tion of the A accumulator is in use.

Instruction Format:
( . .	.	. .		) Y:ea,D
( . .	.	. .		) S,Y:ea
( . .	.	. .		) #xxxxxx,D
Opcode:
		23		16	15		8	7	0
			0	1 d d 1 d d d		W 1 M	M M R R R		INSTRUCTION OPCODE

OPTIONAL EFFECTIVE ADDRESS EXTENSION

Instruction Fields:

ea=6-bit Effective Address=MMMRRR

		Effective
Register W		Addressing Mode	M	M M R			R	R
Read S	0	(Rn)-Nn	0	0	0	r	r	r
Write D	1	(Rn)+Nn	0	0	1	r	r	r
		(Rn)-	0	1	0	r	r	r
		(Rn)+	0	1	1	r	r	r
		(Rn)	1	0	0	r	r	r
		(Rn+Nn)	1	0	1	r	r	r
		-(Rn)	1	1	1	r	r	r
		Absolute address	1	1	0	0	0	0
		Immediate data	1	1	0	1	0	0

where “rrr” refers to an address register R0–R7

A - 188 INSTRUCTION SET DETAILS MOTOROLA