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x86-64 (also known as x64, x86_64, AMD64, and Intel 64) [note 1] is a 64-bit version of the x86 instruction set, first announced in 1999. It introduced two new modes of operation, 64-bit mode and compatibility mode, along with a new 4-level paging mode.
Em 1999-2003, a AMD estendeu essa arquitetura de 32 bits para 64 bits e se refere a ele como x86-64 em documentos antigos e mais tarde como AMD64. a Intel logo adotou extensões da arquitetura da AMD, como o nome IA-32e que foi mais tarde renomeado de Intel EM64T e, finalmente, 64.
x86-64 is the 64-bit extended architecture of x86, its Legacy Mode preserves the entire and unaltered x86 architecture.
Added with x86-64. These instructions can only be encoded in 64 bit mode. They fall in four groups: original instructions that reuse existing opcodes for a different purpose (MOVSXD replacing ARPL) original instructions with new opcodes (SWAPGS) existing instructions extended to a 64 bit address size (JRCXZ)
Barramento. Arquiteturas. Referências. 64 bits. Em informática, 64 bits é o termo usado para designar dispositivos (normalmente microprocessadores) que trabalham com um conjunto de 64 bits por vez.
The 64-bit extension created by Advanced Micro Devices (AMD) to Intel's x86 architecture (later licensed by Intel); commonly termed x86-64, AMD64, or x64: AMD's AMD64 extensions (used in Athlon 64 , Opteron , Sempron , Turion 64 , Phenom , Athlon II , Phenom II , APU , FX , Ryzen , and Epyc processors)
x86 assembly language is the name for the family of assembly languages which provide some level of backward compatibility with CPUs back to the Intel 8008 microprocessor, which was launched in April 1972. [1] [2] It is used to produce object code for the x86 class of processors.
