Motorola 24-Bit Digital Signal Processor, DSP56000 manual Special Addressing Immediate Data

INSTRUCTION FORMATS

EXAMPLE A: IMMEDIATE INTO 24-BIT REGISTER

(MOVE #$123456,A0)

			BEFORE EXECUTION
	A2		A1		A0
55	48 47		24 23		0
X X		X X X X X X		X X X X X X
7	0	23	0	23	0

			AFTER EXECUTION
	A2		A1		A0
55	48 47		24 23			0
X X		X X X X X X		1 2 3 4		5 6
7	0	23	0	23		0

EXAMPLE B:POSITIVE IMMEDIATE INTO 56-BIT REGISTER

(MOVE #$123456,A)

		BEFORE EXECUTION					AFTER EXECUTION
	A2	A1	A0			A2	A1	A0
55	48 47	24 23		0	55	48 47	24 23	0

X X X X X X X X X X X X X X

7 0 23 0 23 0

0		0		1	2	3	4	5	6	0	0	0	0	0	0
7		0	23					0	23					0

EXAMPLE C: NEGATIVE IMMEDIATE INTO 56-BIT REGISTER

(MOVE #$801234,A)

			BEFORE EXECUTION
	A2		A1		A0
55	48 47		24 23		0
X X		X X X X X X		X X X X X X
7	0	23	0	23	0

Assembler Syntax: #XXXXXX

Memory Spaces: P:

Additional Instruction Execution Time (Clocks): 2

Additional Effective Address Words: 1

			AFTER EXECUTION
	A2		A1		A0
	55	48 47		24 23		0
	F F		8 0 1 2	3 4	0 0 0 0 0 0
7		0	23	0	23	0

Figure 6-7 Special Addressing – Immediate Data

when used to address program memory. This addressing mode is classified as a program

reference.

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