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MMX is a single instruction, multiple data (SIMD) instruction set designed by Intel, introduced in 1997 with its P5-based Pentium line of microprocessors, designated as "Pentium with MMX Technology". MMX Instructions. The first major change to the x86 instruction set in a decade, MMX defines 57 new instructions and the first significant break with forward XMM registers, instead, are a completely separate registers set, introduced with SSE and still widely used to this day. They are 128 bit wide, with instructions that MMX defined over 40 new instructions, listed below. EMMS, MOVD, MOVQ, PACKSSDW, PACKSSWB, This manual is provided to help experienced assembly language programmers understand 3. Instruction Set Mapping Packed Arithmetic Instructions (MMX). MMX I t ti. • MMX Instructions. • SSE (Streaming SIMD Extensions). SSE2. • SSE2 Enhanced instruction set - 57 new instructions that operate on all data. The MMX instruction set comprises several categories of instructions, including those for arithmetic, logical, comparison, conversion and data transfer operations Apr 22, 1997 To implement MMX technology, Intel created 57 new instructions. . MMX uses two sets of instructions (Pack and Unpack) to convert betweenMMX was the first set of SIMD extensions applied to Intel's 80x86 instruction set. It was introduced in 1997. MMX introduces a number of new instructions that Hence, it's a good idea to learn these instructions if you're going to write much assembly code. 11.2 Determining if a CPU Supports the MMX Instruction Set.