<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Mar 23, 2010, at 11:00 AM, Jochen Wilhelmy wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div><br><blockquote type="cite">That would probably be because you're compiling for x86-64 and the x86-64 ABI handling code canonicalizes vector types to<2 x double> for argument passing.<br></blockquote><blockquote type="cite"> <br></blockquote>but what happens to the rest of the elements?<br><br>-Jochen<font class="Apple-style-span" color="#000000"><font class="Apple-style-span" color="#144FAE"><br></font></font></div></blockquote><br></div><div>In the example given, a <4 x float> was being passed as a <2 x double> . They are both 128 bits, and if the example had continued on, you'd have seen a bit convert from <2 x double> to <4 x float> in the entry block of the function, converting it back to its appropriate type without any loss of data.</div><div><br></div><div>Cheers,</div><div>Nate</div><div><br></div><div><br></div><div><br></div></body></html>