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I don’t think you do. Look at the generated code

?

What he said.

First off, you can have more than one base register; a reentrant module generally will have at least two: One for the code and one for data.

Secondly, you can always load/compute the full address of a variable in a register.?

-ahd-

-- 
Drew Derbyshire

"Whatever is not nailed down is mine. What I can pry loose is not
 nailed down."                                  -- Collis P. Huntingdon