Displaying 3 results from an estimated 3 matches for "pccvcmp".
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pccvcmp_o
2006 Oct 05
1
[LLVMdev] The meaning of SDNPHasChain
...I'm not quite sure. Can someone describe the
semantics of this property and also what is a typical usage of it?
In particular, I have found that CMP nodes for different targets are
described differently with regard to this property. ARM backend defines
armcmp without this property. PCC defines PCCvcmp and PCCvcmp_o also
without this property. In Sparc backend SPcmpicc is also not using it.
But X86cmp does for some reason. I'm trying to understand if I need it
for my backend or not.
It would be also interesting to get some information about other SDNP-*
SelectionDAG node properties, e.g. SDN...
2006 Oct 05
0
[LLVMdev] Questions about instruction selection and instruction definitions
On Thu, 5 Oct 2006, Roman Levenstein wrote:
>> Check out how the sparc or powerpc backends handle this. They lower
>> to a
>> select_cc pseudo-op that expands to an if/then/else control flow.
>
> Thanks! The hint about a pseudo-op was really good. After I realized how
> it works, I started the implementation of SELECT_CC using this approach.
> Hopefully, I can
2006 Oct 05
2
[LLVMdev] Questions about instruction selection and instruction definitions
> On Wed, 4 Oct 2006, Roman Levenstein wrote:
> >> You can add the line
> >> setOperationAction(ISD::SELECT, MVT::i32, Expand);
> >> to the constructor of you TargetLowering class. See the current
> >> backend for an example.
> >
> > I actually tried it first. But then if, I remember correctly,
> SELECT
> > nodes were expanded into