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riscv-registers.md

RISC-V Registers Cheatsheet

Numeric ABI Name Calling Convention RVC? RVE?
x0 zero Immutable No Yes
x1 ra Return Address No Yes
x2 sp Callee-Saved No* Yes
x3 gp Unallocatable No Yes
x4 tp Unallocatable No Yes
x5-x7 t0-t2 Caller-Saved No Yes
x8 s0, fp Callee-Saved Yes Yes
x9 s1 Callee-Saved Yes Yes
x10-x15 a0-a5 Arguments Yes Yes
x16-x17 a6-a7 Arguments No No
x18-x27 s2-s11 Callee-saved No No
x28-x31 t3-t6 Caller-Saved No No
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