Analog Devices ADSP-BF53x Blackfin Reference page 699

Notice that the history bit code depends on the
for
src_reg_1
.
src_reg_0
The single operand versions behave similarly.
Single 16-Bit Operand Behavior
If the dual source register contains the data shown in
tination register receives the data shown in
Table 19-10. Source Registers Contain
src_reg
Table 19-11. Destination Register Contains
dest_reg_lo
The ASL version shifts
indicate the source of the maximum.
Table 19-12. ASL Version Shifts
A0.X
A0 00000000
Conversely, the ASR version shifts
an MSB to indicate the source of the maximum.
ADSP-BF53x/BF56x Blackfin Processor Programming Reference
is always shifted onto
31................24 23................16
y1
31................24 23................16
left one bit position and appends an LSB to
A0
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXB
Vector Operations
shift direction. The bit
A0
first, followed by the bit for
A0
Table 19-11.
15..................8
15..................8
Maximum, y1 or y0
A0.W
right one bit position and appends
A0
Table 19-10 the des-
7....................0
y0
7....................0
19-11