From 40cb4bf236a56328ee60978166334828ee726c12 Mon Sep 17 00:00:00 2001
From: rakslice <rakslice@gmail.com>
Date: Tue, 17 Mar 2020 18:46:40 -0700
Subject: [PATCH] implementing bswap_16 to avoid incorrect result from cygwin
 1.7 gcc 3.4.4 built dyngen for lhz

---
 SheepShaver/src/Windows/sysdeps.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/SheepShaver/src/Windows/sysdeps.h b/SheepShaver/src/Windows/sysdeps.h
index 432b7e57..0d73d2bd 100755
--- a/SheepShaver/src/Windows/sysdeps.h
+++ b/SheepShaver/src/Windows/sysdeps.h
@@ -149,6 +149,19 @@ static inline uint32 do_opt_bswap_32(uint32 x)
   __asm__ __volatile__ ("bswap %0" : "=r" (v) : "0" (x));
   return v;
 }
+
+#if defined(__CYGWIN__) || defined(__MINGW32__)
+
+#define opt_bswap_16 do_opt_bswap_16
+static inline uint16 do_opt_bswap_16(uint16 x)
+{
+  uint16 v;
+  __asm__ __volatile__ ("rolw $8, %0" : "=r" (v) : "0" (x));
+  return v;
+}
+
+#endif
+
 #endif
 #endif