Analog Devices ADSP-BF53x Blackfin Reference page 476

Instruction Overview
• is cleared.
AC0
• is cleared.
V
• All other flags are unaffected.
The ADSP-BF535 processor has fewer
operate differently than subsequent Blackfin family products. For
more information on the ADSP-BF535 status flags, see
on page
Required Mode
User & Supervisor
Parallel Issue
This instruction can be issued in parallel with specific other 16-bit
instructions. For details, see
Example
Bit Field Extraction Unsigned
r7 = extract (r4, r3.l) (z) ;
• If
•
R4=0b1010 0101 1010 0101 1100 0011 1010 1010
where this is the scene bit field
•
R3=0bxxxx xxxx xxxx xxxx 0000 0111 0000 0100
where bits 15–8 are the position, and bits 7–0 are the length
then the Bit Field Extraction (unsigned) instruction produces:
•
R7=0b0000 0000 0000 0000 0000 0000 0000 0111
13-18 ADSP-BF53x/BF56x Blackfin Processor Programming Reference
A-3.
"Issuing Parallel Instructions" on page
flags and some flags
ASTAT
/* zero-extended*/
Table A-1
20-1.