Enables generation of VMX (Vector Multimedia Extension) instructions.
On operating system versions that support VMX instructions, -qenablevmx is set by default. Otherwise, the default is -qnoenablevmx.
Some processors are able to support VMX (Vector Multimedia Extension) instructions. These instructions can offer higher performance when used with algorithmic-intensive tasks such as multimedia applications.
The -qenablevmx compiler option enables generation of VMX instructions, but you should not use this option unless your operating system version supports VMX instructions.
Also, if -qnoenablevmx is in effect, -qaltivec cannot be used.