Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Should fix compilation with old Yasm/Nasm versions.
Signed-off-by: James Almer <jamrial@gmail.com>

~20% faster than AVX.
Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: James Almer <jamrial@gmail.com>

* Reduced xmm register count to 7 (As such they are now enabled for x86_32).
* Removed four movdqa (affects the sse2 version only).
* pxor is now used to clear m0 only once.

~5% faster.
Reviewed-by: Christophe Gisquet <christophe.gisquet@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

~15% faster than sse2
Reviewed-by: Mickaël Raulet <mraulet@gmail.com>
Reviewed-by: Christophe Gisquet <christophe.gisquet@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

Reviewed-by: James Almer <jamrial@gmail.com>
Approved-by: Ronald S. Bultje
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>