Renesas TM V.3.20A Spécifications Page 110

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Renesas Technology, Tools FAQs
Last Updated: December 20, 2000
Document Number: 01051280_e
Q.
Which registers are stored in the stack when calling a function?
A.
Only registers that will be referenced after the function are stored in the stack.
[Example] (when referencing Register R1 after calling the function)
mov.w R1,_a
mov.w R1,-4[FB] ; Register R1 is stored in the stack.
jsr _func
mov.w -4[FB],R1 ; Register R1 is returned.
cmp.w #10,R1 ; Register R1 is referenced after the function is called.
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