sparc - What's the proper way to update a value passed in assembly? -


i'm using sparc architecture. have update number of long passed argument without returning it, don't know how because input registers used both parameters , returning value. i've seen using instructions such as

add   %l0, %l1, %i1

that it's possible modify contents of register, far can tell changes "copy" of parameter rather parameter itself. i've experimented load command , store command in ways such as

ld    [%o1], %i1

and

st    %l1, [%fp-8]

and don't seem change need changed.

i figured out. save instruction makes argument available in in register (in case, %i1), , there it's just

st %l1, [%i1 + 1]

and have make sure number in place of 4 compatible number of bytes between elements of array. in case +1 works char array.


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