Register (RISC-V)

risc-v

Definition

Register (RISC-V)

A register is a small storage location inside the processor.

RISC-V has 32 integer registers named x0 to x31. Many of them also have conventional alias names such as sp, ra, and a0.

Register Set

Name	Register Number	Usage
zero	x0	Constant zero
ra	x1	Return address
sp	x2	Stack pointer
gp	x3	Global pointer
tp	x4	Thread pointer
t0-t2	x5-7	Temporary variables
s0	x8	Saved variable/frame pointer
s1	x9	Saved variable
a0-a1	x10-11	Function arguments/return values
a2-a7	x12-17	Function arguments
s2-s11	x18-27	Saved variables
t3-6	x28-31	Temporary variables