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to those processors, introducing the IA-32 32-bit version of the x86 architecture, extended the eight 16-bit registers to 32 bits, with "E" added to the beginning of the register name; in IA-32, the memory address of an operand is the sum of one of those eight registers, one of seven of those registers (the stack pointer is not allowed as the second register here) multiplied by 1, 2, 4, or 8, and a displacement. The Advanced Micro Devices Opteron,

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