Re: Void Pointer Alignment - GCC 3.4.6

[Ian Lance Taylor <iant at google dot com>]

Rohit Arul Raj <rohitarulraj@gmail.com> writes:

> I am working with GCC 3.4.6 for a private target. The Alignment of all
> pointer variables in my target is supposed to be 16bits. But it seems
> that for void pointers, the alignment by default is taken as 8 bits. I
> have defined the following macros to get the desired alignment but
> still it doesn't seem to work.
>
> #define Pmode HImode
> #define POINTER_SIZE 16
>
> Are there any other macros that are supposed to be defined to get the
> preferred alignment or any other way of implementing this?

Alignment is not set based on the size, though that often determines a
default value.  It is set based on macros in the CPU.h file, like
BIGGEST_ALIGNMENT, DATA_ALIGNMENT, LOCAL_ALIGNMENT,
STACK_SLOT_ALIGNMENT, etc.  See the internals documentation.

Ian