Hi Ira,
Sorry about the delayed response. Filters broke somehow and I saw this mail only today.
On Sat, 2010-12-18 at 16:14 +0000, Ira Rosen wrote:
Right, we need vld2 and vst2 for Viterbi, and we are working on their implementation (see this thread for the latest discussion http://lists.linaro.org/pipermail/linaro-toolchain/2010-December/000540.html).
Ok - that sounds interesting. I wasn't sure if load / store sinking alone would end up giving us the 4x gain that we could get from vectorising viterbi.
I see that we support v<cond> in the backend now but we don't
support
the vector bitfield instructions like vbit / vbif and vbsl which can
be
used for vector select other than through intrinsics.
I haven't checked this. But in any case vector select is very important and it's a good idea to support it anyway.
I went back and looked into it again and it appears as though the support is in there already thanks to Julian. So it needs the vld2 support and the hoisting / sinking bits you mention.
cheers Ramana
Ira
I could be of-course missing something here ....
cheers Ramana
Ira
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