Displaying 2 results from an estimated 2 matches for "iseldattodag".
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iseldagtodag
2017 May 30
1
Pseudo-instruction that overwrites its input register
The reason the ones in PPCInstrInfo.td don't have the patterns to match is
the reason they are more analogous to your problem. Namely, tblgen does not
have a way to produce nodes with more than one result. The load-with-update
instructions do exactly that - one of the inputs is also an output, but the
other output is independent (and necessarily a separate register). The FMA
variants have
2017 May 30
2
Pseudo-instruction that overwrites its input register
On Tue, 30 May 2017, Nemanja Ivanovic wrote:
> This is typically accomplished with something like PPC's `RegConstraint` and
> `NoEncode`. You can see examples of it that are very similar to what you're after in
> PPC's load/store with update forms (i.e. load a value and update the base register
> with the effective address - these are used for pre-increment loads/stores).