https://111qqz.com/en/tags/simd/Recent content in Simd on 111qqz's blogHugo -- gohugo.ioen© 2015-2026 111qqzThu, 22 Jul 2021 20:01:50 +0800https://111qqz.com/en/post/%E5%B7%A5%E7%A8%8B/%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96/2021-07-22-debugging-avx2-on-gcc4/Thu, 22 Jul 2021 20:01:50 +0800https://111qqz.com/en/post/%E5%B7%A5%E7%A8%8B/%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96/2021-07-22-debugging-avx2-on-gcc4/<h2 class="relative group">背景 <div id="背景" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e8%83%8c%e6%99%af" aria-label="Anchor">#</a> </span> </h2> <p>起因是同事在实现int4的功能，结果流水线有一条死活过不了(gcc版本为4.8.5),一直core dump 经过初步排查，找出了如下最小可以复现的代码:</p>