AMD64 architecture

E84586

computer architecture instruction set architecture

The AMD64 architecture is a 64-bit instruction set architecture introduced by AMD that extends the x86 design to support larger memory addressing and enhanced performance while maintaining backward compatibility with 32-bit software.

Aliases (5)

Statements (50)

Predicate	Object
instanceOf	computer architecture → instruction set architecture →
addsFeature	64-bit general-purpose registers → 64-bit integer operations → 64-bit virtual address space → NX bit support → SSE2 as baseline → additional general-purpose registers → instruction pointer relative addressing → new calling conventions →
alsoKnownAs	Intel 64 (compatible variant) → x86-64 → x86_64 →
architectureFamily	x86 →
backwardCompatibleWith	IA-32 → x86 →
bitWidth	64-bit →
category	64-bit microprocessor architecture →
designedFor	enhanced performance over 32-bit x86 → larger memory addressing →
developer	AMD → Advanced Micro Devices →
extends	IA-32 architecture → x86 register set →
generalPurposeRegistersCount	16 →
influenced	Intel 64 architecture →
introduced	2003 →
introducedBy	AMD Athlon 64 processors → AMD Opteron processors →
maintains	backward compatibility with 32-bit applications →
physicalAddressSize	implementation dependent →
registerWidth	64 bits →
supports	16-bit real mode (in legacy mode) → 32-bit software → 64-bit computing → compatibility mode → legacy mode → long mode → paging → virtual memory →
supportsOperatingSystem	BSD x86-64 → Linux x86-64 → Windows x64 → macOS (on Intel-based Macs) →
usedIn	desktop computers → laptop computers → servers → workstations →
virtualAddressSize	typically 48 bits in early implementations →
wordSize	64 bits →

Referenced by (7)

Subject (surface form when different)	Predicate
AMD64 architecture ("x86-64") → AMD64 architecture ("x86_64") →	alsoKnownAs
Apple Safari ("Intel x86-64") → Solaris ("AMD64") →	supportsArchitecture
Advanced Micro Devices ("x86-64") →	architecture
AMD processors →	implements
Advanced Micro Devices ("AMD64 instruction set architecture") →	introduced