Analog Devices ADSP-BF53x Blackfin Reference page 480

Instruction Overview
In the Shift Left version, the processor performs the following sequence.
1. Left shift Accumulator
source_0
2. Left shift Accumulator
source_1
and
source_1 source_0
Table 13-3. Contents Before Shift
IF
source_1:
source_0:
Accumulator A0:
Table 13-4. A Shift Right Instruction
IF
1
source_1:
2
source_0:
3
Accumulator A0:
1 source_1 is shifted right 1 place
2 source_0 is shifted right 1 place
3 Accumulator A0 is shifted right 2 places
13-22 ADSP-BF53x/BF56x Blackfin Processor Programming Reference
by one bit. Left shift the MSB of
A0
into the LSB of the Accumulator.
by one bit. Left shift the MSB of
A0
into the LSB of the Accumulator.
must not be the same D-register.
39............32 31............24
xxxx xxxx
yyyy yyyy
zzzz zzzz zzzz zzzz
39............32 31............24
0xxx xxxx
0yyy yyyy
yxzz zzzz zzzz zzzz
23............16 15..............8
xxxx xxxx xxxx xxxx
yyyy yyyy yyyy yyyy
zzzz zzzz zzzz zzzz
23............16 15..............8
xxxx xxxx xxxx xxxx
yyyy yyyy yyyy yyyy
zzzz zzzz zzzz zzzz
7................0
xxxx xxxx
yyyy yyyy
zzzz zzzz
7................0
xxxx xxxx
yyyy yyyy
zzzz zzzz