From WikiChip
x86

x86
Instruction Set Architecture
HistoryFamilies
Variants
x86-16x86-32x86-64
Topics
InstructionsAddressing ModesRegisters
AssemblyCPUIDInterrupts
Micro-OpsTimerCalling Convention
Microarchitectures
Modes
RealProtectedLong
Extensions
SMMFPUMMX
3DNow!SSEE3DNow!
EMMXSSE2SSE3
SSSE3SSE4.1SSE4.2
SSE4aABMSSE5
XOPCLMULAVX
F16CFMA3FMA4
SMXAESTBM
BMI1BMI2TSX
AVX2ADXRdRAND
PREFETCHAVX-512MPX
SGXSHA
[t]

x86 is a family of little-endian, CISC, instruction set architectures and extensions. As its namesake indicates, the x86 ISA offers binary compatibility all the way from the original 8086 to modern microarchitectures as well as source code compatibility since the 8080. Today, the architecture is widely used in the desktop and server markets by a number of companies including Intel, AMD, VIA, DM&P, and RDC.

Generally speaking, the term 'x86' encompasses the original x86-16, x86-32 (IA-32), x86-64 (AMD64), and the various extensions such as MMX, 3DNOW!, and SSE.

History[edit]

Main article: History of x86

New text document.svg This section is empty; you can help add the missing info by editing this page.

Overview[edit]

New text document.svg This section is empty; you can help add the missing info by editing this page.

Registers[edit]

New text document.svg This section is empty; you can help add the missing info by editing this page.

Operation Modes[edit]

New text document.svg This section is empty; you can help add the missing info by editing this page.

Instruction Set[edit]

New text document.svg This section is empty; you can help add the missing info by editing this page.

Syntaxes[edit]

New text document.svg This section is empty; you can help add the missing info by editing this page.

Interrupts[edit]

New text document.svg This section is empty; you can help add the missing info by editing this page.

Extensions[edit]

New text document.svg This section is empty; you can help add the missing info by editing this page.

Implementations[edit]

New text document.svg This section is empty; you can help add the missing info by editing this page.

See also[edit]


Text document with shapes.svg This article is still a stub and needs your attention. You can help improve this article by editing this page and adding the missing information.
1 octets
2 nibbles
2 octets
4 nibbles
4 octets
8 nibbles
8 octets
16 nibbles



Facts about "x86"
designVon Neumann +
designerIntel + and AMD +
dev modelProprietary +
endiannessLittle-endian +
first launched1978 +
formatRegister-Memory +
full page namex86 +
namex86 +
word size8 bit (1 octets, 2 nibbles) +, 16 bit (2 octets, 4 nibbles) +, 32 bit (4 octets, 8 nibbles) + and 64 bit (8 octets, 16 nibbles) +