On Friday 13 January 2006 11:56, Chris Wedgwood wrote:
> On Thu, Jan 12, 2006 at 08:04:41AM -0800, Bryan O'Sullivan wrote:
>
> > This is true for 64-bit writes over Hypertransport
>
> is this something that will always be or just something current
> hardware does?
Yes, why risking that things will go wrong?
Also you'll get shorter code. Instead of
> + .globl memcpy32
> +memcpy32:
> + movl %edx,%ecx
> + shrl $1,%ecx
> + andl $1,%edx
> + rep movsq
> + movl %edx,%ecx
> + rep movsd
> + ret
you need just
.globl memcpy32
memcpy32:
movl %edx,%ecx
rep movsd
ret
With properly written inlined asms code will be
reduced to just "rep movsd".
--
vda
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