Analog Devices ADSP-BF53x Blackfin, Reference

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Instruction Overview
11-4 ADSP-BF53x/BF56x Blackfin Processor Programming Reference
The following flags are affected by the Compare Data Register instruction.
•
CC
is set if the test condition is true; cleared if false.
•
AZ
is set if result is zero; cleared if nonzero.
•
AN
is set if result is negative; cleared if non-negative.
•
AC0
is set if result generated a carry; cleared if no carry.
• All other flags are unaffected.
L
The ADSP-BF535 processor has fewer
ASTAT
flags and some flags
operate differently than subsequent Blackfin family products. For
more information on the ADSP-BF535 status flags, see
Table A-1
on page A-3 .
Required Mode
User & Supervisor
Parallel Issue
This instruction cannot be issued in parallel with other instructions.
Example
cc = r3 == r2 ;
cc = r7 == 1 ;
/* If r0 = 0x8FFF FFFF and r3 = 0x0000 0001, then the signed
operation . . . */
cc = r0 < r3 ;
/* . . . produces cc = 1, because r0 is treated as a negative
value */
cc = r2 < -4 ;
cc = r6 <= r1 ;
cc = r4 <= 3 ;