Motorola 24-Bit Digital Signal Processor, DSP56000 manual Example, Movem PR5+N5, LC

INSTRUCTION DESCRIPTIONS

MOVEM Move Program Memory

Example:

:

MOVEM

MOVEM P:(R5+N5), LC

	:
		Before Execution
P:(R5 + N5)
	$000116

:move P:(R5+N5) into the loop counter (LC)

	After Execution
P:(R5 + N5)
	$000116

LC

$0000

LC

$0116

Explanation of Example: Prior to execution, the 16-bit loop counter (LC) register con- tains the value $0000, and the 24-bit program (P) memory location P:(R5+N5) contains the value $000116. The execution of the MOVEM P:(R5+N5), LC instruction moves the 16 LS bits of the 24-bit program (P) memory location P:(R5+N5) into the 16-bit LC regis- ter.

Condition Codes:

15	14	13	12	11		10	9		8	7	6	5	4	3	2	1		0
LF	DM	T	**		S1	S0		I1	I0	S	L	E	U	N	Z		V	C
				MR									CCR

For D=SR operand:

S — Set according to bit 7 of the source operand

L — Set according to bit 6 of the source operand

E — Set according to bit 5 of the source operand

U — Set according to bit 4 of the source operand

N — Set according to bit 3 of the source operand

Z — Set according to bit 2 of the source operand

V — Set according to bit 1 of the source operand

C — Set according to bit 0 of the source operand

For D≠SR operand:

S — Computed according to the definition in A.5 CONDITION CODE COMPUTATION L — Set if data limiting has occurred during the move

A - 216 INSTRUCTION SET DETAILS MOTOROLA