[Bug target/7625] gcc pessimized 64-bit % operator on hppa2.0

[dave at hiauly1 dot hia dot nrc dot ca]

------- Comment #5 from dave at hiauly1 dot hia dot nrc dot ca  2006-04-10 20:17 -------
Subject: Re:  gcc pessimized 64-bit % operator on hppa2.0

> Boooooooiinngggggg.......
> 
> Or, is anyone working on this?

I'm not.  Note that the HP code is using 64-bit registers and instructions
in 32-bit mode for the call to $$rem2.  I think doing this in GCC is going
to be tricky as normal calls only save the the least significant 32-bits.
Maybe we could somehow confine 64-bit register values to the call
clobbered registers.  Normally register pairs are used for 64-bit values.

In 64-bit mode, we can probably easily benefit from using the new 64-bit
millicode.

Dave


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7625