static int disable_mmx()
Disables MMX or similar technologies. The transforms will then be
performed using the baseline code.
static int mmxflag
Contains a value greater than zero if the CPU supports vectorial
instructions. A negative value means that you must call enable_mmx
and test the value again. Direct access to this member should only be
used to transfer the instruction flow to the vectorial branch of the
code. Never modify the value of this variable. Use
disable_mmx instead.