From 7876b5b8bef1ff8460e48232e68bb5136f04e7b5 Mon Sep 17 00:00:00 2001
From: Eddie Hung <eddie@fpgeh.com>
Date: Fri, 14 Jun 2019 12:40:51 -0700
Subject: Cover __APPLE__ too for little to big endian

---
 backends/aiger/xaiger.cc | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

(limited to 'backends')

diff --git a/backends/aiger/xaiger.cc b/backends/aiger/xaiger.cc
index 7e22dca7f..7cb311736 100644
--- a/backends/aiger/xaiger.cc
+++ b/backends/aiger/xaiger.cc
@@ -18,6 +18,15 @@
  *
  */
 
+// https://stackoverflow.com/a/46137633
+#ifdef _MSC_VER
+#include <stdlib.h>
+#define __builtin_bswap32 _byteswap_ulong
+#elif defined(__APPLE__)
+#include <libkern/OSByteOrder.h>
+#define __builtin_bswap32 OSSwapInt32
+#endif
+
 #include "kernel/yosys.h"
 #include "kernel/sigtools.h"
 #include "kernel/utils.h"
@@ -27,11 +36,7 @@ PRIVATE_NAMESPACE_BEGIN
 
 inline int32_t to_big_endian(int32_t i32) {
 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-#ifdef _WIN32
-	return _byteswap_ulong(i32);
-#else
 	return __builtin_bswap32(i32);
-#endif
 #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 	return i32;
 #else
-- 
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