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VEX prefix
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<p>The VEX prefix (from "vector extensions") and VEX coding scheme are an extension to the <a href="/facts/IA-32/7yTv1aHH">IA-32</a> and <a href="/facts/X86-64/cyWvUFlP">x86-64</a> <a href="/facts/Instruction_set_architecture/8p8vwUeE">instruction set architecture</a> for <a href="/facts/Microprocessor/Fx9CaQht">microprocessors</a> from <a href="/facts/Intel/SMF0gJJX">Intel</a>, <a href="/facts/Advanced_Micro_Devices/CB1G7QTb">AMD</a> and others. </p>