Lexicon Entry
Instruction Set Architecture (ISA)
The abstract specification of a processor's machine language: its instructions, registers, memory model, and encoding format. x86-64 and ARM64 are ISAs.
Related Knowledge & Cross-References
Guide
Compiler Code Generation: How LLVM Turns IR into x86-64 and ARM64 Assembly
Between the hardware-agnostic world of Intermediate Representation and the raw binary bytes your CPU executes lies the backend pipeline. Learn how the compiler turns abstract logic into platform-specific machine code.