Hello,

I want to replace the following code chema:

with something like:

for using r12 as link register instead of pushing return addresses onto the stack. But it seems, RIP relative addressing is bound to indirect load or store operations and I need the content of RIP + index instead.

Is that possible ?

-Mat.

LEA gets the address, MOV gets the content at address, but your words seem to indicate you need something like? When POP R12 occurs I'm not sure what is on the stack - code is too vague.

thanks, the solution was

return is then simply:

the extra mov was necessary because I handle with 64 bit linear addresses (and the call routine can be mapped above 4 GB theoretically).

-Mat.

Any routine which gets called more than once would benefit (in terms of code size and cache useage) from a vector table: Of course, this doesn't effect the return, and also adds flexiblity to change the destination across the code base by changing a single address.

I know and using these technique for token-threading interpreters (Forth) but this time the target is an JIT compiler which generates native code (again Forth) so because code addresses are only known at compile time the only sense for it would be something like an address cache and this wouldn't be worth the effort.

Regards,
Mat.