From: Torsten Mohr <tmohr@s.netic.de>
To: gcc@gcc.gnu.org
Subject: V850 ABI?
Date: Sun, 21 Aug 2005 11:07:00 -0000 [thread overview]
Message-ID: <200508211312.43162.tmohr@s.netic.de> (raw)
Hi,
from gcc-3.4.4/gcc/config/v850/v850.h i got some ideas
about the registers (#defs REGISTER_NAMES and
ADDITIONAL_REGISTER_NAMES) and about the use of them
from the comments to #def REG_ALLOC_ORDER.
In that file i've also read about an option "ghs", does
that one switch to the Greenhills ABI?
From that file i can't really conclude everything.
For example i don't know if registers 20 and 21 hold the
values 255 and 65535 (an optimisation on V850). The startup
code in newlib assigns them, but does gcc really rely on that
and uses that (this question is just an example)?
Is there a description of the ABI or the ABIs available?
Best regards,
Torsten.
next reply other threads:[~2005-08-21 11:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-21 11:07 Torsten Mohr [this message]
2005-08-24 19:03 ` James E Wilson
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