Motorola 24-Bit Digital Signal Processor, DSP56000 manual Condition Codes

INSTRUCTION DESCRIPTIONS

REP

Repeat Next Instruction

REP

Explanation of Example: Prior to execution, the 24-bit X0 register contains the value $000100, and the 16-bit loop counter (LC) register contains the value $0000. The execu- tion of the REP X0 instruction takes the 24-bit value in the X0 register, truncates the MS 8 bits, and stores the 16 LS bits in the 16-bit loop counter (LC) register. Thus, the single- word MAC instruction immediately following the REP instruction is repeated $100 times.

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 source operand A or B:

S — Computed according to the definition. See Notes on page A-255.L — Set if data limiting occurred. See Notes on page A-255.

For other source operands:

The condition code bits are not affected.

A - 250 INSTRUCTION SET DETAILS MOTOROLA