On Tue, 2010-09-28 at 00:00 +0800, Shervin Emami wrote:
> Hi,
>
> I am using gcc-4.2 to "compile" my ARMv7 assembly language .s file as
> part of an XCode3.2 project on Mac OSX 10.6. I am using ARM NEON
> assembly language instructions, but gcc doesn't allow me to set the
> memory alignment for ARM NEON loads. For example, the following
> assembly language instruction should tell the ARM NEON coprocessor
> that it should load a chunk of memory from memory that is aligned to
> 64 bytes:
>
> vld1.8 {q0}, [r0@64]
>
> This should run execute faster than the instruction for unknown memory
> alignment:
>
> vld1.8 {q0}, [r0]
>
> Unfortunately, gcc-4.2 gives me an error when it sees the @ symbol. Is
> there any way to specify the memory alignment in assembly code (for
> NEON load and store instructions)?
Use a colon (:) in place of the @ sign (in GAS @ is the comment
character).
R.
