This is the mail archive of the cgen@sourceware.org mailing list for the CGEN project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: ALIAS instructions are messed up?

Joern Rennecke wrote:
Whether to disallow alias insns entirely is a separate question. Dunno.
[We could still keep it for macro-insns.
And I realize there are a few ports that currently use it, or at least specify > it.] 

Currently, macro-instructions can't be used in all instances where
it should be natural to use them.
When you want to set a multi-ifield to a constant, you end up with
the entire costant being added in in the bit position of each of
constituent simple bitfields.

Let's fix this. Do you have an example readily available?


By adding an ALIAS instruction by hand, you can at least work around
the problem by setting only simple bitfields to constants.

Good point.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]