From 605d811e6cc94736dd609c644404dd24c013fd6f Mon Sep 17 00:00:00 2001 From: George Prekas Date: Fri, 3 May 2019 11:44:56 -0500 Subject: [PATCH] enable LZ4_FAST_DEC_LOOP build macro on aarch64/GCC by default --- lib/lz4.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/lib/lz4.c b/lib/lz4.c index 69143c0..070dd7e 100644 --- a/lib/lz4.c +++ b/lib/lz4.c @@ -317,6 +317,11 @@ static const int dec64table[8] = {0, 0, 0, -1, -4, 1, 2, 3}; #ifndef LZ4_FAST_DEC_LOOP # if defined(__i386__) || defined(__x86_64__) # define LZ4_FAST_DEC_LOOP 1 +# elif defined(__aarch64__) && !defined(__clang__) + /* On aarch64, we disable this optimization for clang because on certain + * mobile chipsets and clang, it reduces performance. For more information + * refer to https://github.com/lz4/lz4/pull/707. */ +# define LZ4_FAST_DEC_LOOP 1 # else # define LZ4_FAST_DEC_LOOP 0 # endif -- 2.7.4