Gromacs
2019
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#include <cmath>
#include "gromacs/math/functions.h"
#include "gromacs/math/utilities.h"
#include "gromacs/simd/scalar/scalar.h"
Scalar math functions mimicking GROMACS SIMD math functions.
These versions make it possible to write functions that are templated with either a SIMD or scalar type. While some of these functions might not appear SIMD-specific, we have placed them here because the only reason to use these instead of generic function is in templated combined SIMD/non-SIMD code. It is important that these functions match the SIMD versions exactly in their arguments and template arguments so that overload resolution works correctly.
Functions | |
static float | gmx::copysign (float x, float y) |
Composes single value with the magnitude of x and the sign of y. More... | |
static void | gmx::invsqrtPair (float x0, float x1, float *out0, float *out1) |
Calculate 1/sqrt(x) for two floats. More... | |
static float | gmx::inv (float x) |
Calculate 1/x for float. More... | |
static float | gmx::maskzInvsqrt (float x, bool m) |
Calculate 1/sqrt(x) for masked entry of float. More... | |
static float | gmx::maskzInv (float x, bool m) |
Calculate 1/x for masked entry of float. More... | |
template<MathOptimization opt = MathOptimization::Safe> | |
static float | gmx::sqrt (float x) |
Float sqrt(x). This is the square root. More... | |
static float | gmx::log (float x) |
Float log(x). This is the natural logarithm. More... | |
template<MathOptimization opt = MathOptimization::Safe> | |
static float | gmx::exp2 (float x) |
Float 2^x. More... | |
template<MathOptimization opt = MathOptimization::Safe> | |
static float | gmx::exp (float x) |
Float exp(x). More... | |
static float | gmx::erf (float x) |
Float erf(x). More... | |
static float | gmx::erfc (float x) |
Float erfc(x). More... | |
static void | gmx::sincos (float x, float *sinval, float *cosval) |
Float sin & cos. More... | |
static float | gmx::sin (float x) |
Float sin. More... | |
static float | gmx::cos (float x) |
Float cos. More... | |
static float | gmx::tan (float x) |
Float tan. More... | |
static float | gmx::asin (float x) |
float asin. More... | |
static float | gmx::acos (float x) |
Float acos. More... | |
static float | gmx::atan (float x) |
Float atan. More... | |
static float | gmx::atan2 (float y, float x) |
Float atan2(y,x). More... | |
static float | gmx::pmeForceCorrection (float z2) |
Calculate the force correction due to PME analytically in float. More... | |
static float | gmx::pmePotentialCorrection (float z2) |
Calculate the potential correction due to PME analytically in float. More... | |
static double | gmx::copysign (double x, double y) |
Composes double value with the magnitude of x and the sign of y. More... | |
static void | gmx::invsqrtPair (double x0, double x1, double *out0, double *out1) |
Calculate 1/sqrt(x) for two doubles. More... | |
static double | gmx::inv (double x) |
Calculate 1/x for double. More... | |
static double | gmx::maskzInvsqrt (double x, bool m) |
Calculate 1/sqrt(x) for masked entry of double. More... | |
static double | gmx::maskzInv (double x, bool m) |
Calculate 1/x for masked entry of double. More... | |
template<MathOptimization opt = MathOptimization::Safe> | |
static double | gmx::sqrt (double x) |
Double sqrt(x). This is the square root. More... | |
static double | gmx::log (double x) |
Double log(x). This is the natural logarithm. More... | |
template<MathOptimization opt = MathOptimization::Safe> | |
static double | gmx::exp2 (double x) |
Double 2^x. More... | |
template<MathOptimization opt = MathOptimization::Safe> | |
static double | gmx::exp (double x) |
Double exp(x). More... | |
static double | gmx::erf (double x) |
Double erf(x). More... | |
static double | gmx::erfc (double x) |
Double erfc(x). More... | |
static void | gmx::sincos (double x, double *sinval, double *cosval) |
Double sin & cos. More... | |
static double | gmx::sin (double x) |
Double sin. More... | |
static double | gmx::cos (double x) |
Double cos. More... | |
static double | gmx::tan (double x) |
Double tan. More... | |
static double | gmx::asin (double x) |
Double asin. More... | |
static double | gmx::acos (double x) |
Double acos. More... | |
static double | gmx::atan (double x) |
Double atan. More... | |
static double | gmx::atan2 (double y, double x) |
Double atan2(y,x). More... | |
static double | gmx::pmeForceCorrection (double z2) |
Calculate the force correction due to PME analytically in double. More... | |
static double | gmx::pmePotentialCorrection (double z2) |
Calculate the potential correction due to PME analytically in double. More... | |
static double | gmx::invsqrtSingleAccuracy (double x) |
Calculate 1/sqrt(x) for double, but with single accuracy. More... | |
static void | gmx::invsqrtPairSingleAccuracy (double x0, double x1, double *out0, double *out1) |
Calculate 1/sqrt(x) for two doubles, but with single accuracy. More... | |
static double | gmx::invSingleAccuracy (double x) |
Calculate 1/x for double, but with single accuracy. More... | |
static double | gmx::maskzInvsqrtSingleAccuracy (double x, bool m) |
Calculate 1/sqrt(x) for masked entry of double, but with single accuracy. More... | |
static double | gmx::maskzInvSingleAccuracy (double x, bool m) |
Calculate 1/x for masked entry of double, but with single accuracy. More... | |
static double | gmx::sqrtSingleAccuracy (double x) |
Calculate sqrt(x) for double, but with single accuracy. More... | |
static double | gmx::logSingleAccuracy (double x) |
Double log(x), but with single accuracy. This is the natural logarithm. More... | |
static double | gmx::exp2SingleAccuracy (double x) |
Double 2^x, but with single accuracy. More... | |
static double | gmx::expSingleAccuracy (double x) |
Double exp(x), but with single accuracy. More... | |
static double | gmx::erfSingleAccuracy (double x) |
Double erf(x), but with single accuracy. More... | |
static double | gmx::erfcSingleAccuracy (double x) |
Double erfc(x), but with single accuracy. More... | |
static void | gmx::sincosSingleAccuracy (double x, double *sinval, double *cosval) |
Double sin & cos, but with single accuracy. More... | |
static double | gmx::sinSingleAccuracy (double x) |
Double sin, but with single accuracy. More... | |
static double | gmx::cosSingleAccuracy (double x) |
Double cos, but with single accuracy. More... | |
static double | gmx::tanSingleAccuracy (double x) |
Double tan, but with single accuracy. More... | |
static double | gmx::asinSingleAccuracy (double x) |
Double asin, but with single accuracy. More... | |
static double | gmx::acosSingleAccuracy (double x) |
Double acos, but with single accuracy. More... | |
static double | gmx::atanSingleAccuracy (double x) |
Double atan, but with single accuracy. More... | |
static double | gmx::atan2SingleAccuracy (double y, double x) |
Double atan2(y,x), but with single accuracy. More... | |
static double | gmx::pmeForceCorrectionSingleAccuracy (double z2) |
Force correction due to PME in double, but with single accuracy. More... | |
static double | gmx::pmePotentialCorrectionSingleAccuracy (double z2) |
Potential correction due to PME in double, but with single accuracy. More... | |