Vector Negate (Two's-Complement) - Analog Devices ADSP-BF53x Blackfin Reference

Instruction Overview

Vector Negate (Two's-Complement)

General Form
dest_reg = – source_reg (V)
Syntax
Dreg = – Dreg (V) ;
Syntax Terminology
:
Dreg R7–0
Instruction Length
In the syntax, comment (b) identifies 32-bit instruction length.
Functional Description
The Vector Negate instruction returns the same magnitude with the
opposite arithmetic sign, saturated for each 16-bit half-word in the source.
The instruction calculates by subtracting the source from zero.
See "Saturation" on page 1-17
Flags Affected
This instruction affects flags as follows.
• is set if either or both results are zero; cleared if both are
AZ
nonzero.
• is set if either or both results are negative; cleared if both are
AN
non-negative.
• is set if either or both results saturate; cleared if neither saturates.
V
19-46 ADSP-BF53x/BF56x Blackfin Processor Programming Reference
/* dual 16-bit operation (b) */
for a description of saturation behavior.