Analog Devices ADSP-BF53x Blackfin Reference page 557

The versions of this instruction that produce 16-bit results are affected by
the bit in the
RND_MOD
16-bit destination register.
ased rounding is used.
instruction that produce 16-bit results except the
options.
See "Saturation" on page 1-17
See "Rounding and Truncating" on page 1-19
ing behavior.
The versions of this instruction that produce 32-bit results do not perform
rounding and are not affected by the
Options
The Multiply 16-Bit Operands instruction supports the following
options. Saturation is supported for every option.
To truncate the result, the operation eliminates the least significant bits
that do not fit into the destination register.
In fractional mode, the product of the smallest representable fraction
times itself (for example, 0x8000 times 0x8000) is saturated to the maxi-
mum representable positive fraction (0x7FFF).
ADSP-BF53x/BF56x Blackfin Processor Programming Reference
register when they copy the results into the
ASTAT
determines whether biased or unbi-
RND_MOD
controls rounding for all versions of this
RND_MOD
for a description of saturation behavior.
RND_MOD
Arithmetic Operations
, and
(IS) (IU)
for a description of round-
bit in the register.
ASTAT
(ISS2)
15-45