Analog Devices ADSP-BF53x Blackfin Reference page 715

Example
r4=r5>>>3 (v) ;
R5.L by 3 bits (divide each half-word by 8) If r5 = 0x8004 000F
then the result is r4 = 0xF000 0001 */
r4=r5>>>3 (v, s) ;
r2=ashift r7 by r5.l (v) ;
depending on sign of r5.l) R7.H and R7.L by magnitude of R5.L */
r2=ashift r7 by r5.l (v, s) ;
the result */
r2=r5<<7 (v,s) ;
by 7 bits, saturated */
Also See
Vector Logical
Special Applications
None
ADSP-BF53x/BF56x Blackfin Processor Programming Reference
/* arithmetic right shift immediate R5.H and
/* same as above, but saturate the result */
/* arithmetic shift (right or left,
/* logical left shift immediate R5.H and R5.L
Shift, Arithmetic Shift,
Vector Operations
/* same as above, but saturate
Logical Shift
19-27