NEON implementation for Adler32

third_party/zlib/adler32.c

Index: third_party/zlib/adler32.c
diff --git a/third_party/zlib/adler32.c b/third_party/zlib/adler32.c
index d0be4380a39c9c5bf439b1552c43585b5aafad0a..26dad168ab09691a060e1ff0606b6886049e132b 100644
--- a/third_party/zlib/adler32.c
+++ b/third_party/zlib/adler32.c
@@ -6,6 +6,9 @@
 /* @(#) $Id$ */
 
 #include "zutil.h"
+#ifdef __ARM_NEON__
+#include "neon_adler32.h"
+#endif
 
 local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));
 
@@ -65,6 +68,12 @@ uLong ZEXPORT adler32_z(adler, buf, len)
     const Bytef *buf;
     z_size_t len;
 {
+#ifdef __ARM_NEON__
+    if (len > 31) {

[f(malita), 2017/02/21 14:36:37]

nit: local code style doesn't seem to require braces for single-line conditional
blocks.

+      return NEON_adler32(adler, buf, len);

[f(malita), 2017/02/21 14:36:37]

general nit: local code style is 4x-space indentation.

+    }
+#endif
+
     unsigned long sum2;
     unsigned n;