Analog Devices ADSP-BF53x Blackfin Reference page 698

Instruction Overview
Table 19-6. ASL Version Shifts
A0.X
A0 00000000
Table 19-7. Where
BB
00
01
10
11
Conversely, the ASR version shifts
two MSBs to indicate the source of each maximum as shown in
Table 19-8 and
Table 19-8. ASR Version Shifts
A0.X
A0 00000000
Table 19-9. Where
BB
00
01
10
11
19-10 ADSP-BF53x/BF56x Blackfin Processor Programming Reference
A0.W
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXBB
Indicates
z0 and y0 are maxima
z0 and y1 are maxima
z1 and y0 are maxima
z1 and y1 are maxima
Table 19-9.
A0.W
BBXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Indicates
y0 and z0 are maxima
y0 and z1 are maxima
y1 and z0 are maxima
y1 and z1 are maxima
right two bit positions and appends
A0