<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><div><br> </div>At 2014-09-10 17:49:21,"Praveen Tiwari" <praveen@multicorewareinc.com> wrote:<br> <blockquote id="isReplyContent" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;"><div dir="ltr"><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">chen</b> <span dir="ltr"><<a href="mailto:chenm003@163.com">chenm003@163.com</a>></span><br>Date: Wed, Sep 10, 2014 at 12:14 PM<br>Subject: Re: [x265] Fwd: [PATCH] copy_cnt_4: faster AVX2 code<br>To: Development for x265 <<a href="mailto:x265-devel@videolan.org">x265-devel@videolan.org</a>><br><br><br><div><span style="color: rgb(0, 0, 0); line-height: 1.7; font-family: arial; font-size: 14px;"><div><br> </div>At 2014-09-10 09:34:31,"Praveen Tiwari" <<a href="mailto:praveen@multicorewareinc.com" target="_blank">praveen@multicorewareinc.com</a>> wrote:<br>
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<div class="gmail_quote"><span style="color: rgb(0, 0, 0); line-height: 1.7; font-family: arial; font-size: 14px;">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">chen</b> <span dir="ltr"><<a href="mailto:chenm003@163.com" target="_blank">chenm003@163.com</a>></span><br>Date: Tue, Sep 9, 2014 at 10:17 AM<br>Subject: Re: [x265] [PATCH] copy_cnt_4: faster AVX2 code<br>To: Development for x265 <<a href="mailto:x265-devel@videolan.org" target="_blank">x265-devel@videolan.org</a>><br><br><br>
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<div style="color: rgb(0, 0, 0); line-height: 1.7; font-family: arial; font-size: 14px;">>>Most operator is SSE2, just one movu, why we need AVX2 version on 4x4?</div>
</span><div><font face="arial, sans-serif">what about</font><font color="#000000"><span style="line-height: 1.7; font-size: 14px;"> </span></font><span style="color: rgb(34, 34, 34); line-height: normal; font-family: arial,sans-serif; font-size: 12px;">vinserti128 ?</span><br><br>>>you want to use vinserti128 combin 128bits to 256 bits, is it more cost than two of movu </div></div><div style="color: rgb(0, 0, 0); line-height: 1.7; font-family: arial; font-size: 14px;"><br></div><div><font color="#000000"><span style="line-height: 1.7; font-size: 14px;">I tested both sse and avx2 code on </span></font><span style="color: rgb(34, 34, 34); line-height: normal; font-family: arial,sans-serif; font-size: 13px;">HASWELL-I5 </span><font color="#000000"><span style="line-height: 23.79px; font-size: 14px;">machine</span></font><span style="color: rgb(34, 34, 34); line-height: normal; font-family: arial,sans-serif; font-size: 13px;">, </span><span style="color: rgb(0, 0, 0); line-height: 23.79px; font-size: 14px;"> avx2 code seems a bit faster so, I think we should keep both versions. Here is result of 3 runs:</span></div><div><span style="color: rgb(0, 0, 0); line-height: 23.79px; font-size: 14px;"><br></span></div><div><span style="color: rgb(0, 0, 0); line-height: 23.79px; font-size: 14px;"><b>SSE VERSION:-</b></span></div><div><span style="color: rgb(0, 0, 0); line-height: 23.79px; font-size: 14px;"> </span><font color="#000000"><span style="line-height: 23.79px; font-size: 14px;"> copy_cnt[4x4] 4.21x 110.16 463.86<br></span></font></div><div><font color="#000000"><span style="line-height: 23.79px; font-size: 14px;"> copy_cnt[4x4] 4.18x 104.64 437.08</span></font></div><div><font color="#000000"><span style="line-height: 23.79px; font-size: 14px;"> copy_cnt[4x4] 4.17x 110.23 460.02</span></font></div><div><font color="#000000"><span style="line-height: 23.79px; font-size: 14px;"><br></span></font></div><div><font color="#000000"><span style="line-height: 23.79px; font-size: 14px;"><b>AVX2 VERSION:-</b></span></font></div><div><font color="#000000"><span style="line-height: 23.79px; font-size: 14px;"><div> copy_cnt[4x4] 4.71x 99.23 467.63</div><div> copy_cnt[4x4] 4.39x 104.46 458.58</div><div> copy_cnt[4x4] 4.71x 99.27 467.91</div></span></font></div></div></div></blockquote></div><br>No any improve, it is random deviation, so I like keep old SSE version</div><div class="gmail_quote"> </div><br></div>
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