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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
// File: FloatDouble.cpp
//
#include <common.h>
#include "floatdouble.h"
#define IS_DBL_INFINITY(x) (((*((INT64*)((void*)&x))) & I64(0x7FFFFFFFFFFFFFFF)) == I64(0x7FF0000000000000))
// The default compilation mode is /fp:precise, which disables floating-point intrinsics. This
// default compilation mode has previously caused performance regressions in floating-point code.
// We enable /fp:fast semantics for the majority of the math functions, as it will speed up performance
// and is really unlikely to cause any other code regressions.
// Sin, Cos, and Tan on AMD64 Windows were previously implemented in vm\amd64\JitHelpers_Fast.asm
// by calling x87 floating point code (fsin, fcos, fptan) because the CRT helpers were too slow. This
// is no longer the case and the CRT call is used on all platforms.
// Log, Log10 and Exp were previously slower with /fp:fast on SSE2 enabled hardware (see #500373).
// This is no longer the case and they now consume use the /fp:fast versions.
// Exp(+/-INFINITY) did not previously return the expected results of +0.0 (for -INFINITY)
// and +INFINITY (for +INFINITY) so these cases were handled specially. As this is no longer
// the case and the expected results are now returned, the special handling has been removed.
// Previously there was more special handling for the x86 Windows version of Pow.
// This additional handling was unnecessary and has since been removed.
////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////
///
/// beginning of /fp:fast scope
///
////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////
#ifdef _MSC_VER
#pragma float_control(precise, off)
#endif
/*=====================================Abs======================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Abs, double x)
FCALL_CONTRACT;
return (double)fabs(x);
FCIMPLEND
/*=====================================Acos=====================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Acos, double x)
FCALL_CONTRACT;
return (double)acos(x);
FCIMPLEND
/*=====================================Asin=====================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Asin, double x)
FCALL_CONTRACT;
return (double)asin(x);
FCIMPLEND
/*=====================================Atan=====================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Atan, double x)
FCALL_CONTRACT;
return (double)atan(x);
FCIMPLEND
/*=====================================Atan2====================================
**
==============================================================================*/
FCIMPL2_VV(double, COMDouble::Atan2, double y, double x)
FCALL_CONTRACT;
// atan2(+/-INFINITY, +/-INFINITY) produces +/-0.78539816339744828 (x is +INFINITY) and
// +/-2.3561944901923448 (x is -INFINITY) instead of the expected value of NaN. We handle
// that case here ourselves.
if (IS_DBL_INFINITY(y) && IS_DBL_INFINITY(x)) {
return (double)(y / x);
}
return (double)atan2(y, x);
FCIMPLEND
/*====================================Ceil======================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Ceil, double x)
FCALL_CONTRACT;
return (double)ceil(x);
FCIMPLEND
/*=====================================Cos======================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Cos, double x)
FCALL_CONTRACT;
return (double)cos(x);
FCIMPLEND
/*=====================================Cosh=====================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Cosh, double x)
FCALL_CONTRACT;
return (double)cosh(x);
FCIMPLEND
/*=====================================Exp======================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Exp, double x)
FCALL_CONTRACT;
return (double)exp(x);
FCIMPLEND
/*====================================Floor=====================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Floor, double x)
FCALL_CONTRACT;
return (double)floor(x);
FCIMPLEND
/*=====================================Log======================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Log, double x)
FCALL_CONTRACT;
return (double)log(x);
FCIMPLEND
/*====================================Log10=====================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Log10, double x)
FCALL_CONTRACT;
return (double)log10(x);
FCIMPLEND
/*=====================================ModF=====================================
**
==============================================================================*/
FCIMPL1(double, COMDouble::ModF, double* iptr)
FCALL_CONTRACT;
return (double)modf(*iptr, iptr);
FCIMPLEND
/*=====================================Pow======================================
**
==============================================================================*/
FCIMPL2_VV(double, COMDouble::Pow, double x, double y)
FCALL_CONTRACT;
// The CRT version of pow preserves the NaN payload of x over the NaN payload of y.
if(_isnan(y)) {
return y; // IEEE 754-2008: NaN payload must be preserved
}
if(_isnan(x)) {
return x; // IEEE 754-2008: NaN payload must be preserved
}
// The CRT version of pow does not return NaN for pow(-1.0, +/-INFINITY) and
// instead returns +1.0.
if(IS_DBL_INFINITY(y) && (x == -1.0)) {
INT64 result = CLR_NAN_64;
return (*((double*)((INT64*)&result)));
}
return (double)pow(x, y);
FCIMPLEND
/*====================================Round=====================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Round, double x)
FCALL_CONTRACT;
// If the number has no fractional part do nothing
// This shortcut is necessary to workaround precision loss in borderline cases on some platforms
if (x == (double)((INT64)x)) {
return x;
}
// We had a number that was equally close to 2 integers.
// We need to return the even one.
double tempVal = (x + 0.5);
double flrTempVal = floor(tempVal);
if ((flrTempVal == tempVal) && (fmod(tempVal, 2.0) != 0)) {
flrTempVal -= 1.0;
}
return _copysign(flrTempVal, x);
FCIMPLEND
/*=====================================Sin======================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Sin, double x)
FCALL_CONTRACT;
return (double)sin(x);
FCIMPLEND
/*=====================================Sinh=====================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Sinh, double x)
FCALL_CONTRACT;
return (double)sinh(x);
FCIMPLEND
/*=====================================Sqrt=====================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Sqrt, double x)
FCALL_CONTRACT;
return (double)sqrt(x);
FCIMPLEND
/*=====================================Tan======================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Tan, double x)
FCALL_CONTRACT;
return (double)tan(x);
FCIMPLEND
/*=====================================Tanh=====================================
**
==============================================================================*/
FCIMPL1_V(double, COMDouble::Tanh, double x)
FCALL_CONTRACT;
return (double)tanh(x);
FCIMPLEND
#ifdef _MSC_VER
#pragma float_control(precise, on )
#endif
////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////
///
/// End of /fp:fast scope
///
////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////
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