Analog Devices ADSP-BF53x Blackfin Reference page 470

Instruction Overview
• Sign-extended, L = 0 and p = 0: The architecture copies the lower
order bits of
sign-extends that number. The foreground value has no effect. For
instance, if:
backgnd_reg
L = 0, and
p = 16,
then:
dest_reg
In this example, the architecture copies bits 15–0 from
backgnd_reg
• Sign-extended, (L + p) > 32: Any foreground bits that fall outside
the range 31–0 are truncated.
The Bit Field Deposit instruction does not modify the contents of the two
source registers. One of the source registers can also serve as
Options
The (X) syntax sign-extends the deposited bit field. If you specify the
sign-extended syntax, the operation does not affect the
are less significant than the deposited bit field.
Flags Affected
This instruction affects flags as follows.
• is set if result is zero; cleared if nonzero.
AZ
• is set if result is negative; cleared if non-negative.
AN
• is cleared.
AC0
13-12 ADSP-BF53x/BF56x Blackfin Processor Programming Reference
below position p into
backgnd_reg
= 0x0000 8123,
= 0xFFFF 8123.
into , then sign-extends that number.
dest_reg
, then
dest_reg
.
dest_reg
bits that
dest_reg