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Re: LO_SUM memrefs offsettable ?
- To: Richard Henderson <rth at cygnus dot com>
- Subject: Re: LO_SUM memrefs offsettable ?
- From: Michael Hayes <m dot hayes at elec dot canterbury dot ac dot nz>
- Date: Sun, 24 Jan 1999 23:51:22 +1300 (NZDT)
- Cc: law at cygnus dot com, Bill Currie <bcurrie at tssc dot co dot nz>, Michael Hayes <m dot hayes at elec dot canterbury dot ac dot nz>, egcs at cygnus dot com
- References: <36A7A610.75041BDD@tssc.co.nz> <7321.916959214@hurl.cygnus.com><19990121172743.F7388@dot.cygnus.com>
Richard Henderson writes:
> Sparc as well. HIGH is the top 22, and the field containing
> the LO_SUM is 13 bits.
OK, I've got a rather sparse matrix. Can anyone help fill in the
gaps?
TARGET BITS_PER_HIGH BITS_PER_LO_SUM MAX_OFFSET
c4x 16 16 0
m32r 0
m88k
mips
pa 21 14
rs6000
sparc 22 13
v850
Here MAX_OFFSET is the maximum number of bytes that can be added to
the LO_SUM memref without having to update the associated HIGH part.
Michael.