Caller/Callee Saved Registers
The registers RAX, RCX, RDX, R8, R9, R10, R11 are considered volatile and must be considered destroyed on function calls (unless otherwise safety-provable by analysis such as whole program optimization).
The registers RBX, RBP, RDI, RSI, RSP, R12, R13, R14, and R15 are considered nonvolatile and must be saved and restored by a function that uses them.
See Also
Reference
Change History
Date |
History |
Reason |
---|---|---|
January 2010 |
Added RSP as a nonvolatile register. |
Customer feedback. |