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Re: 32->64 bit cross compilers
- To: Mark Mitchell <mark at codesourcery dot com>
- Subject: Re: 32->64 bit cross compilers
- From: David Edelsohn <dje at watson dot ibm dot com>
- Date: Fri, 04 May 2001 02:13:42 -0400
- cc: aoliva at redhat dot com, janis at us dot ibm dot com, gcc at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org, kenner at vlsi1 dot ultra dot nyu dot edu
I know that Alexandre fixed the PowerPC port well enough that it
does not break with his patches enabled, but I'm not sure how well it
functions with the patches. These are the patches that use "long long"
for 32->64, right?
The PowerPC port hasn't been hosted on a 64-bit system and has not
been tuned for 64-bit CONST_INT. I know that performance is not a
priority for GCC 3.0, but the last time that I was working on 64-bit
hosting, GCC was generating worse code for 64-bit PowerPC than when hosted
in 32-bit mode. The patch of mine for rs6000_emit_move() that Alexandre
applied along with his patches was the beginning of the fixes. If 64-bit
PowerPC code generation takes a hit on the branch, we are going to have to
address that before the release.
David