hardware//CPU//register

A register is a small, ultra-fast storage cell inside the core, typically 32 or 64 bits wide, that holds the operands for the ALU, return addresses, stack pointers and status flags.

A register is a small, ultra-fast storage cell inside the core, typically 32 or 64 bits wide, that holds the operands for the ALU, return addresses, stack pointers and status flags.

ARM architectures expose 16 to 31 general-purpose registers; x86 has historically had fewer and relied more on the stack and memory. Register pressure directly affects the quality of compiler optimization.