# Intrinsics for MMX™ Technology

MMX™ technology is an extension to the Intel® architecture instruction set. The MMX™ instruction set adds 57 opcodes and a 64-bit quadword data type, and eight 64-bit registers. Each of the eight registers can be directly addressed using the register names MM0 to MM7.

The prototypes for MMX™ technology intrinsics are in the mmintrin.h header file.

To use these intrinsics, include the immintrin.h file as follows:

    #include <immintrin.h>

Parent topic: Intrinsics

- Details about MMX™ Technology Intrinsics
- The EMMS Instruction: Why You Need It
- EMMS Usage Guidelines
- General Support Intrinsics (MMX™ technology)
- Packed Arithmetic Intrinsics (MMX™ technology)
- Shift Intrinsics (MMX™ technology)
- Logical Intrinsics (MMX™ technology)
- Compare Intrinsics (MMX™ technology)
- Set Intrinsics (MMX™ technology)