Re: cgen/gas: some support for funny-endian instruction sets

["Frank Ch. Eigler" <fche at redhat dot com>]

Hi -

On Mon, Jul 09, 2001 at 03:53:08PM -0700, Doug Evans wrote:
: [...]  Then I don't have a problem with the patch _providing_
: word[-_]bitsize is renamed (say insn[-_]word[-_]bitsize).

Okay, I'll see if that's easy.


:  > For example:  word-bitsize=16, base-insn-size=32
:  > insn-word=0x76543210 -EB=>0x76 0x54 0x32 0x10 -EL=>0x54 0x76 0x10 0x32
:  > insn-word=0x3210     -EB=>0x32 0x10           -EL=>0x10 0x32
: 
: Why isn't base-insn-size 16?

It's because the bytes past the initial two can contain
decodable, fixed bits which disambiguate among longer
instructions (not just operands).  I've been making
changes to cgen & opcodes over the last few months to
support this case.


- FChE

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