Developer Guide and Reference

Contents

align

Directs the compiler to align the variable to a specified boundary and a specified offset.

Syntax

Windows* OS:
__declspec(align
(
n
)
)
Linux* OS:
__attribute__((aligned
(
n
)
)
)
For portability on Linux OS, you should use the syntax form
__attribute__((aligned(n)))
. This form is compatible with the GNU compiler.
Arguments
n
Specifies the alignment. The compiler will align the variable to an
n
-byte boundary.
Description
This keyword directs the compiler to align the variable to an
n
-byte boundary.
If you require 8-byte alignment, we recommend you specify 16 for
n
, instead of 8. When 8 is used, the compiler interprets the value as a suggestion and you may not get the requested 8-byte alignment, depending on various heuristics.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.