X86-64 instruction set

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x86 instruction set
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x86-64 (also known as just x64 and/or AMD64) is the 64-bit version of the x86/IA32 instruction set. Below is our overview of its features that are relevant Basic Architecture, Order Number 253665; Instruction Set Reference A-Z, Order Number 325383; INTEL® 64 AND IA-32 PROCESSORS COVERED IN THIS MANUAL . x86 and amd64 instruction reference. Derived from the May 2019 version of the Intel® 64 and IA-32 FCOMIP, Compare Floating Point Values and Set EFLAGS. For floating point, we use the %xmm register set provided by the SSE extensions, rather than the old x87 floating instructions. Data Types. The x86-64 registers 64-bits = 8 bytes. • (For a 32-bit data bus, a double would be accessed from memory in 2 reads). In x86-64, instructions generally specify what size data to.x86-64 Instructions Set. CPU instructions. The general-purpose instructions perform basic data movement, arithmetic, logic, program flow, x86-64 Guide. Doeppner. 3.2 Arithmetic Operations. Unless otherwise specified, all arithmetic operation instructions have one suffix. 3.2.1 Unary Operations.