Intel® C++ Compiler 16.0 User and Reference Guide
Directs the compiler to align the variable to a specified boundary and a specified offset.
Windows* OS: __declspec(align(n[,off])) |
Linux* OS: __attribute__((aligned(n[,off]))) __attribute__((align(n[,off]))) |
For portability on Linux* OS, you should use the syntax form __attribute__((aligned(n[, off]))). This form is compatible with the GNU compiler.
n |
Specifies the alignment. The compiler will align the variable to an n-byte boundary. |
off |
Optional. Specifies the offset. If this argument is omitted, the value is 0. |
This keyword directs the compiler to align the variable to an n-byte boundary with offset off within each n-byte boundary. The address of the variable is address mod n=off.
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.