From: Yann Collet <cyan@fb.com>
Date: Fri, 7 May 2021 22:18:16 +0000 (-0700)
Subject: update decoder hot loop alignment
X-Git-Tag: v1.5.0^2~14^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6755baf940ff7b822d8a500999ef616e1bd08283;p=thirdparty%2Fzstd.git

update decoder hot loop alignment

This seems to bring an additional ~+1.2% decompression speed
on average across 10 compilers x 6 scenarios.
---

diff --git a/lib/decompress/zstd_decompress_block.c b/lib/decompress/zstd_decompress_block.c
index 90acc855f..a8ba8d8bb 100644
--- a/lib/decompress/zstd_decompress_block.c
+++ b/lib/decompress/zstd_decompress_block.c
@@ -1161,6 +1161,8 @@ ZSTD_decompressSequences_body( ZSTD_DCtx* dctx,
          *
          *   https://gist.github.com/terrelln/9889fc06a423fd5ca6e99351564473f4
          */
+        __asm__(".p2align 6");
+        __asm__("nop");
         __asm__(".p2align 5");
         __asm__("nop");
         __asm__(".p2align 4");