It contains optimizations that are not specific to i386 and
libavutil uses this naming scheme already.

Originally committed as revision 16270 to svn://svn.ffmpeg.org/ffmpeg/trunk

Neither the asm() nor the __asm__() keyword is part of the C99
standard, but while GCC accepts the former in C89 syntax, it is not
accepted in C99 unless GNU extensions are turned on (with -fasm). The
latter form is accepted in any syntax as an extension (without
requiring further command-line options).

Sun Studio C99 compiler also does not accept asm() while accepting
__asm__(), albeit reporting warnings that it's not valid C99 syntax.

Originally committed as revision 15627 to svn://svn.ffmpeg.org/ffmpeg/trunk

typedef x86_reg as the appropriate size and use it instead.

Originally committed as revision 13081 to svn://svn.ffmpeg.org/ffmpeg/trunk

Merritt:

"It seems that icc copies the constants from their global var onto the
stack, at which point they're not aligned, hence the crash.
[This change] really shouldn't mean anything different, but maybe it'll
confuse icc into not performing that 'optimization'."

Originally committed as revision 12772 to svn://svn.ffmpeg.org/ffmpeg/trunk

width8: 180->92, width4: 78->63 cycles (core2)

Originally committed as revision 12661 to svn://svn.ffmpeg.org/ffmpeg/trunk