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Re: PATCH: Turn mips relaxation if appropriate (Re: MIPS gas relaxation still doesn't work)
On Oct 14, 2002, "H. J. Lu" <hjl@lucon.org> wrote:
> But it is not required to get branch relaxation.
I remember having got an error from the IRIX 6.5 assembler when I gave
it the relax test to assemble. It even suggested me to use a certain
option that I suspect was a compiler option, since passing it to the
assembler had no effect, and failed to assemble the testcase just the
same. Unfortunately our IRIX 6.5 box is unavailable ATM so I can't
double-check, but I think the current implementation matches that of
IRIX.
> Also, I have a problem with --relax-branch/--no-relax-branch. There is
> no mention of them with "as --help"
Oops. This should be fixed, indeed.
> Also gas already has a generic option:
> --relax Relax branches on certain targets
> Why does mips invent a new option?
Because mips-gas does far more relaxation than just branches, and the
rest seems to be what is expected of a mips assembler, so it's enabled
by default, whereas branch relaxation seems to be not the rule, at
least for mips.
--
Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer aoliva@{redhat.com, gcc.gnu.org}
CS PhD student at IC-Unicamp oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist Professional serial bug killer