Merge pull request #1040 from zeux/m1-fastdec

Enable fast decoding on Apple/AArch64 builds (18-25% faster decompression)
lz4 · Nov 23, 2021 · db57809 · db57809
2 parents 8f61d8e + 22e232d
commit db57809
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/lib/lz4.c b/lib/lz4.c
@@ -421,10 +421,12 @@ static const int      dec64table[8] = {0, 0, 0, -1, -4,  1, 2, 3};
 #ifndef LZ4_FAST_DEC_LOOP
 #  if defined __i386__ || defined _M_IX86 || defined __x86_64__ || defined _M_X64
 #    define LZ4_FAST_DEC_LOOP 1
+#  elif defined(__aarch64__) && defined(__APPLE__)
+#    define LZ4_FAST_DEC_LOOP 1
 #  elif defined(__aarch64__) && !defined(__clang__)
-     /* On aarch64, we disable this optimization for clang because on certain
-      * mobile chipsets, performance is reduced with clang. For information
-      * refer to https://github.com/lz4/lz4/pull/707 */
+     /* On non-Apple aarch64, we disable this optimization for clang because
+      * on certain mobile chipsets, performance is reduced with clang. 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