Analog Devices ADSP-BF53x Blackfin Reference page 538

Instruction Overview
EXPADJ
General Form
dest_reg = EXPADJ ( sample_register, exponent_register )
Syntax
Dreg_lo = EXPADJ ( Dreg, Dreg_lo ) ;
Dreg_lo = EXPADJ ( Dreg_lo_hi, Dreg_lo ) ;
ple (b) */
Dreg_lo = EXPADJ ( Dreg, Dreg_lo ) (V) ;
(b) */
Syntax Terminology
:
Dreg_lo_hi R7–0.L
:
Dreg_lo R7–0.L
:
Dreg R7–0
Instruction Length
In the syntax, comment (b) identifies 32-bit instruction length.
Functional Description
The Exponent Detection instruction identifies the largest magnitude of
two or three fractional numbers based on their exponents. It compares the
magnitude of one or two sample values to a reference exponent and
returns the smallest of the exponents.
The exponent is the number of sign bits minus one. In other words, the
exponent is the number of redundant sign bits in a signed number.
15-26 ADSP-BF53x/BF56x Blackfin Processor Programming Reference
,
R7–0.H
/* 32-bit sample (b) */
/* one 16-bit sam-
/* two 16-bit samples