How many registers are there in the CPU?

That diagram seems to describe a specific processor, and the specific names for some of its registers. Different processors have different numbers and types of registers. Most people focus architectural registers, and within the architectural regi... read more

There isn’t a magic command that I know that would give you the answer, though if you know the specific processor model that you have you can start from there, like for the x86–64 there are 16 general purpose registers. read more

The x86-64 bit processor has the following registers: 16 general purpose registers each of 64 bit (including 2 Index registers and 2 Stack registers). 16 128-bit SSE registers; 6 16-bit segment registers; Instruction pointer; Status register; In addition to these there are 8 80-bit x87 registers used for SSE instructions. read more

There is a difference between how many registers the cpu has in total, and how many you can use at once. – Thorbjørn Ravn Andersen Mar 14 '14 at 14:48 CPUs and GPUs hide latency primarily by caches and multithreading respectively. read more