This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: powerpc & unaligned block moves with fp registers
- To: degger at fhm dot edu
- Subject: Re: powerpc & unaligned block moves with fp registers
- From: David Edelsohn <dje at watson dot ibm dot com>
- Date: Sun, 11 Nov 2001 17:43:56 -0500
- Cc: dewar at gnat dot com, gcc at gcc dot gnu dot org
>>>>> degger writes:
Daniel> Depends on the CPU, The latest PPCs for example combine accesses under
Daniel> most conditions, however having several accesses instead of a single one
Daniel> will lead to higher I-Cache pressure. I would prefer aligning the
Daniel> complete structure on a natural boundary and extract single components
Daniel> by masking them.
Aligning the structure on particular boundaries violates the
existing PowerPC ABIs. Next...
David