[update comments
peter@cordes.ca**20080322102733] {
hunk ./rshift.asm 309
-C regs: args: %rdi, %rsi, %rdx, %rcx, %r8, %r9
+C regs: args out/in: %rax / %rdi, %rsi, %rdx, %rcx, %r8, %r9
+C callee saved: %rbx, %rbp, %r10, %r13-15
hunk ./rshift.asm 313
+C %rsp: stack pointer
}