<div dir="ltr">Makes sense. Thank you. </div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jul 9, 2015 at 4:33 PM, Justin Holewinski <span dir="ltr"><<a href="mailto:jholewinski@nvidia.com" target="_blank">jholewinski@nvidia.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">jholewinski added a comment.<br>
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The short answer is that ptxas doesn't handle vector registers very well. It may be good to revisit this, but ptxas currently prefers scalar ops.<br>
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Last time I looked into this, the implementation cost greatly outweighed any potential benefits. At the SASS level, we don't have vector fp ops anyway.<br>
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</span><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__reviews.llvm.org_D11089&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=mQ4LZ2PUj9hpadE3cDHZnIdEwhEBrbAstXeMaFoB9tg&m=6yI-4MQzbpKziEGLTbGUpqCUpLshisrhqTrpseYHS4U&s=CT_p_fjDzxHJLexj4EUvOMzZxU70ENmKbN4KIhtNrRw&e=" rel="noreferrer" target="_blank">http://reviews.llvm.org/D11089</a><br>
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