ReactOS Development > Doxygen

00001 /*
00002  * COPYRIGHT:   See COPYING in the top level directory
00003  * PROJECT:     ReactOS system libraries
00004  * FILE:        lib/crt/??????
00005  * PURPOSE:     Unknown
00006  * PROGRAMER:   Unknown
00007  * UPDATE HISTORY:
00008  *              25/11/05: Added license header
00009  */
00010 
00011 #include <precomp.h>
00012 #include "float.h"
00013 
00014 //WTF IS HAPPENING WITH float.h !??!?!
00015 #define _SW_INVALID    0x00000010 /* invalid */
00016 #define _SW_ZERODIVIDE 0x00000008 /* zero divide */
00017 #define _SW_UNDERFLOW  0x00000002 /* underflow */
00018 #define _SW_OVERFLOW   0x00000004 /* overflow */
00019 #define _SW_INEXACT    0x00000001 /* inexact (precision) */
00020 #define _SW_DENORMAL    0x00080000 /* denormal status bit */
00021 
00022 /**********************************************************************
00023  *      _statusfp (MSVCRT.@)
00024  */
00025 unsigned int CDECL _statusfp(void)
00026 {
00027   unsigned int retVal = 0;
00028   unsigned int fpword;
00029 
00030 #ifdef _M_AMD64
00031     fpword = _mm_getcsr();
00032 #elif defined(__GNUC__)
00033   __asm__ __volatile__( "fstsw %0" : "=m" (fpword) : );
00034 #else // _MSC_VER
00035   __asm fstsw [fpword];
00036 #endif
00037   if (fpword & 0x1)  retVal |= _SW_INVALID;
00038   if (fpword & 0x2)  retVal |= _SW_DENORMAL;
00039   if (fpword & 0x4)  retVal |= _SW_ZERODIVIDE;
00040   if (fpword & 0x8)  retVal |= _SW_OVERFLOW;
00041   if (fpword & 0x10) retVal |= _SW_UNDERFLOW;
00042   if (fpword & 0x20) retVal |= _SW_INEXACT;
00043   return retVal;
00044 }
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