From 99e6df4612ac596da6413112223e1867f6c8b5af Mon Sep 17 00:00:00 2001
From: zilmar <zilmar@pj64-emu.com>
Date: Sun, 17 Jan 2016 16:58:47 +1100
Subject: [PATCH] [Common] Add fesetround to Platform.cpp

---
 Source/Common/Platform.cpp | 19 +++++++++++++++++--
 Source/Common/Platform.h   | 11 ++++++++++-
 2 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/Source/Common/Platform.cpp b/Source/Common/Platform.cpp
index 845f09642..26ee3f3e4 100644
--- a/Source/Common/Platform.cpp
+++ b/Source/Common/Platform.cpp
@@ -1,7 +1,7 @@
 #include "stdafx.h"
 
 #ifndef _WIN32
-int _vscprintf (const char * format, va_list pargs)
+int _vscprintf(const char * format, va_list pargs)
 {
     int retval;
     va_list argcopy;
@@ -10,4 +10,19 @@ int _vscprintf (const char * format, va_list pargs)
     va_end(argcopy);
     return retval;
 }
-#endif
\ No newline at end of file
+#endif
+
+#ifdef _MSC_VER
+#include <float.h>
+
+int fesetround(int RoundType)
+{
+    static const unsigned int msRound[4] = { _RC_NEAR, _RC_CHOP, _RC_UP, _RC_DOWN };
+    int32_t res = _controlfp(msRound[RoundType], _MCW_RC);
+    if (res == _RC_NEAR) { return FE_TONEAREST; }
+    if (res == _RC_CHOP) { return FE_TOWARDZERO; }
+    if (res == _RC_UP) { return FE_UPWARD; }
+    if (res == _RC_DOWN) { return FE_DOWNWARD; }
+    return FE_TONEAREST;
+}
+#endif
diff --git a/Source/Common/Platform.h b/Source/Common/Platform.h
index 8fd411564..5757a41b9 100644
--- a/Source/Common/Platform.h
+++ b/Source/Common/Platform.h
@@ -7,8 +7,17 @@
 #define _stricmp strcasecmp
 #define _strnicmp strncasecmp
 #define _snprintf snprintf
+#define _isnan isnan
 #define GetCurrentThreadId pthread_self
 
 int _vscprintf (const char * format, va_list pargs);
 
-#endif
\ No newline at end of file
+#endif
+
+//FPU rounding code
+#ifdef _WIN32
+typedef enum { FE_TONEAREST = 0, FE_TOWARDZERO, FE_UPWARD, FE_DOWNWARD } eRoundType;
+int fesetround(int RoundType);
+#else
+#include <fenv.h>
+#endif