<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Oct 21, 2014, at 9:26 AM, Matt Arsenault <<a href="mailto:arsenm2@gmail.com" class="">arsenm2@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><blockquote type="cite" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br class="Apple-interchange-newline">On Oct 21, 2014, at 6:38 AM, Tom Stellard <<a href="mailto:tom@stellard.net" class="">tom@stellard.net</a>> wrote:<br class=""><br class="">On Sat, Oct 18, 2014 at 01:57:11AM +0000, Matt Arsenault wrote:<br class=""><blockquote type="cite" class="">e.g. v_mad_f32 a, b, c -> v_mad_f32 b, a, c<br class=""><br class="">This simplifies matching v_madmk_f32.<br class=""><br class="">This looks somewhat surprising, but it appears to be<br class="">OK to do this. We can commute src0 and src1 in all<br class="">of these instructions, and that's all that appears<br class="">to matter.<br class=""><br class=""></blockquote><br class="">Are there any advantages to being able to commute VOP3 instructions?<br class=""><br class="">-Tom<br class=""></blockquote><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">Mostly just canonicalization to simplify other checks. For example, I have another patch that forms v_madmk_f32 which relies on this to avoid checking for an immediate in the 2nd operand</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""></div></blockquote></div><br class=""><div class=""><br class=""></div><div class="">ping</div></body></html>