From dc02563e0536490a5d993515f1329ed72870414b Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Tue, 15 Dec 2015 12:57:49 +0100
Subject: [PATCH] src: remove __builtin_bswap16 call

Not supported by apple-gcc and I'm not convinced it's worth adding more
preprocessor hacks when it should be easy as pie for the compiler to
to optimize the byteswap.  If it doesn't, fix the compiler.

Fixes: https://github.com/nodejs/node/issues/4284
PR-URL: https://github.com/nodejs/node/pull/4290
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
---
 src/util-inl.h | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/src/util-inl.h b/src/util-inl.h
index 669b7e7535884b..69dc5b2a61a1a9 100644
--- a/src/util-inl.h
+++ b/src/util-inl.h
@@ -199,15 +199,8 @@ TypeName* Unwrap(v8::Local<v8::Object> object) {
 }
 
 void SwapBytes(uint16_t* dst, const uint16_t* src, size_t buflen) {
-  for (size_t i = 0; i < buflen; i++) {
-    // __builtin_bswap16 generates more efficient code with
-    // g++ 4.8 on PowerPC and other big-endian archs
-#ifdef __GNUC__
-    dst[i] = __builtin_bswap16(src[i]);
-#else
+  for (size_t i = 0; i < buflen; i += 1)
     dst[i] = (src[i] << 8) | (src[i] >> 8);
-#endif
-  }
 }