I am not talking about a library solution at all. I am talking about a
solution inside the compiler. Gcc will optimize memcpy; how much for
MIPS is a good question. Try it out and see. Oh if you are using
scei's gcc you really should be reporting issues to them.
On Aug 31, 2010, at 10:03 PM, "yotambarnoy at gmail dot com" <gcc-bugzi...@gcc.gnu.org
> wrote:
------- Comment #8 from yotambarnoy at gmail dot com 2010-09-01
05:03 -------
Unfortunately, a lib based solutions are difficult for me to
implement. The
reason is that the current PSP SDK uses newlib. I can probably
change my
personal toolchain with some work, but then it's a custom
modification that
needs to be replicated to every other ScummVM dev as well as our
buildbot. Not
impossible, but not work I'd like to get in to right now.
In any case, it sounds like what you're saying is that memcpy has asm
instructions in the right place to use lwl and lwr. I can also do
that in my
implementation.
My request was more general, as in gcc needs some kind of custom
keyword to
tell it to allow unaligned pointers and to generate appropriate
unaligned code,
so we don't have to trick the compiler into doing it in a way that
ruins
optimization. Something like __unaligned__ uint32 *ptr32 = bytePtr;
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45462
