Controls special code generation Intel MMX extensions.

This pragma is compatible with the following platform targets:

68K

PowerPC

NEC V800

Intel x86

MIPS

Embedded 68K

This pragma tells the x86 compiler to generate code for Intel MMX extensions. This option causes the compiler to generate code that will only run on processors that are equipped with the circuitry needed to execute the more than 50 specialized MMX instructions.

This pragma corresponds to the MMX option in the Extended Instruction Set menu of the x86 CodeGen settings panel. To check whether this option is on, use __option (mmx), described in "Checking Options."

To learn more about this pragma, read the Targeting Win32 manual.