ARCHIVE/rippled
1
0
Fork 0
mirror of https://github.com/XRPLF/rippled.git synced 2025-11-20 11:05:54 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add beast_basics module

Browse Source
This commit is contained in:
Vinnie Falco
2013-06-17 06:42:49 -07:00
parent f2d84f0a90
commit d0a309e6da
121 changed files with 15337 additions and 76 deletions
Download Patch File Download Diff File Expand all files Collapse all files

189
modules/beast_basics/native/beast_win32_FPUFlags.cpp Normal file
View File

@@ -0,0 +1,189 @@
/*============================================================================*/
/*
VFLib: https://github.com/vinniefalco/VFLib
Copyright (C) 2008 by Vinnie Falco <vinnie.falco@gmail.com>
This library contains portions of other open source products covered by
separate licenses. Please see the corresponding source files for specific
terms.
VFLib is provided under the terms of The MIT License (MIT):
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN THE SOFTWARE.
*/
/*============================================================================*/
FPUFlags FPUFlags::getCurrent ()
{
unsigned int currentControl;
const unsigned int newControl = 0;
const unsigned int mask = 0;
errno_t result = _controlfp_s (&currentControl, newControl, mask);
if (result != 0)
Throw (std::runtime_error ("error in _controlfp_s"));
FPUFlags flags;
flags.setMaskNaNs ((currentControl & _EM_INVALID) == _EM_INVALID);
flags.setMaskDenormals ((currentControl & _EM_DENORMAL) == _EM_DENORMAL);
flags.setMaskZeroDivides ((currentControl & _EM_ZERODIVIDE) == _EM_ZERODIVIDE);
flags.setMaskOverflows ((currentControl & _EM_OVERFLOW) == _EM_OVERFLOW);
flags.setMaskUnderflows ((currentControl & _EM_UNDERFLOW) == _EM_UNDERFLOW);
//flags.setMaskInexacts ((currentControl & _EM_INEXACT) == _EM_INEXACT);
flags.setFlushDenormals ((currentControl & _DN_FLUSH) == _DN_FLUSH);
flags.setInfinitySigned ((currentControl & _IC_AFFINE) == _IC_AFFINE);
Rounding rounding = roundDown;
switch (currentControl & _MCW_RC)
{
case _RC_CHOP:
rounding = roundChop;
break;
case _RC_UP:
rounding = roundUp;
break;
case _RC_DOWN:
rounding = roundDown;
break;
case _RC_NEAR:
rounding = roundNear;
break;
default:
Throw (std::runtime_error ("unknown rounding in _controlfp_s"));
};
flags.setRounding (rounding);
Precision precision = bits64;
switch (currentControl & _MCW_PC )
{
case _PC_64:
precision = bits64;
break;
case _PC_53:
precision = bits53;
break;
case _PC_24:
precision = bits24;
break;
default:
Throw (std::runtime_error ("unknown precision in _controlfp_s"));
};
flags.setPrecision (precision);
return flags;
}
static void setControl (const FPUFlags::Flag& flag,
unsigned int& newControl,
unsigned int& mask,
unsigned int constant)
{
if (flag.is_set ())
{
mask |= constant;
if (flag.value ())
newControl |= constant;
}
}
void FPUFlags::setCurrent (const FPUFlags& flags)
{
unsigned int newControl = 0;
unsigned int mask = 0;
setControl (flags.getMaskNaNs (), newControl, mask, _EM_INVALID);
setControl (flags.getMaskDenormals (), newControl, mask, _EM_DENORMAL);
setControl (flags.getMaskZeroDivides (), newControl, mask, _EM_ZERODIVIDE);
setControl (flags.getMaskOverflows (), newControl, mask, _EM_OVERFLOW);
setControl (flags.getMaskUnderflows (), newControl, mask, _EM_UNDERFLOW);
//setControl (flags.getMaskInexacts(), newControl, mask, _EM_INEXACT);
setControl (flags.getFlushDenormals (), newControl, mask, _DN_FLUSH);
setControl (flags.getInfinitySigned (), newControl, mask, _IC_AFFINE);
if (flags.getRounding ().is_set ())
{
Rounding rounding = flags.getRounding ().value ();
switch (rounding)
{
case roundChop:
mask |= _MCW_RC;
newControl |= _RC_CHOP;
break;
case roundUp:
mask |= _MCW_RC;
newControl |= _RC_UP;
break;
case roundDown:
mask |= _MCW_RC;
newControl |= _RC_DOWN;
break;
case roundNear:
mask |= _MCW_RC;
newControl |= _RC_NEAR;
break;
}
}
if (flags.getPrecision ().is_set ())
{
switch (flags.getPrecision ().value ())
{
case bits64:
mask |= _MCW_PC;
newControl |= _PC_64;
break;
case bits53:
mask |= _MCW_PC;
newControl |= _PC_53;
break;
case bits24:
mask |= _MCW_PC;
newControl |= _PC_24;
break;
}
}
unsigned int currentControl;
errno_t result = _controlfp_s (&currentControl, newControl, mask);
if (result != 0)
Throw (std::runtime_error ("error in _controlfp_s"));
}