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Re: LO_SUM memrefs offsettable ?
- To: law at cygnus dot com
- Subject: Re: LO_SUM memrefs offsettable ?
- From: Joern Rennecke <amylaar at cygnus dot co dot uk>
- Date: Fri, 22 Jan 1999 15:10:17 +0000 (GMT)
- Cc: bcurrie at tssc dot co dot nz, m dot hayes at elec dot canterbury dot ac dot nz, egcs at cygnus dot com
> Basically, there's a few bits of overlap on the PA. The "HIGH" sets the
> upper 21 bits, the LO_SUM sets the low 14 bits. Thus we can add small
> offsets directly to the LO_SUM and not lose.
AFAIK there's also overlap for the sparc. A lack of overlap can probably
be considered a design problem of the architecture, since it disables a
lot of cse opportunities.