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Re: IA-64 issue H-1: Return address register number
- To: dehnert at baalbek dot engr dot sgi dot com (Jim Dehnert)
- Subject: Re: IA-64 issue H-1: Return address register number
- From: James Cownie <jcownie at etnus dot com>
- Date: Wed, 05 Apr 2000 10:51:46 +0100
- cc: dwarf2 at baalbek dot engr dot sgi dot com
- Reply-To: James Cownie <jcownie at etnus dot com>
> We have an issue here with our register numbering, which assigns 1-127
> to the GRs and 128-255 to the FRs, leaving nothing in the one-byte
> range for the return address "register" (which is not an actual
> register but an abstract register).
Can't you use 0-126, 127-254 and leave 255 for the RA ?
Or did you mean 0-127 for the integer registers ?
I'm not (yet) sufficiently familiar with IA64 to know whether register
0 is a "reads and writes as zero register" in the normal RISC style or
not.
-- Jim
James Cownie <jcownie@etnus.com>
Etnus, Inc. +44 117 9071438
http://www.etnus.com