q3::precision Namespace Reference

Functions
void	cast_double_to_single (int count, const Complex *source, ComplexSingle *destination)
void	cast_real_double_to_single (int count, const Real *source, RealSingle *destination)
void	cast_real_single_to_double (int count, const RealSingle *source, Real *destination)
void	cast_single_to_double (int count, const ComplexSingle *source, Complex *destination)

Function Documentation

cast_double_to_single()

void q3::precision::cast_double_to_single ( int  count, const Complex *  source, ComplexSingle *  destination  )

inline

Cast an array of double-precision complex values to single-precision.

Element-wise narrowing conversion: each Complex element is converted to ComplexSingle by truncating the mantissa from 52 to 23 bits.

Parameters

count	Number of elements to convert.
source	Input array of Complex (FP64) values.
destination	Output array of ComplexSingle (FP32) values. Must be pre-allocated with at least count elements.

Definition at line 35 of file precision_cast.hpp.

Referenced by q3::GPUPlanewaveHamiltonianApplicator::prepare_kpoint().

cast_real_double_to_single()

void q3::precision::cast_real_double_to_single ( int  count, const Real *  source, RealSingle *  destination  )

inline

Cast an array of double-precision real values to single-precision.

Parameters

count	Number of elements to convert.
source	Input array of Real (FP64) values.
destination	Output array of RealSingle (FP32) values.

Definition at line 67 of file precision_cast.hpp.

Referenced by q3::GPUPlanewaveHamiltonianApplicator::prepare_kpoint(), and q3::GPUPlanewaveHamiltonianApplicator::update_potential().

cast_real_single_to_double()

void q3::precision::cast_real_single_to_double ( int  count, const RealSingle *  source, Real *  destination  )

inline

Cast an array of single-precision real values to double-precision.

Parameters

count	Number of elements to convert.
source	Input array of RealSingle (FP32) values.
destination	Output array of Real (FP64) values.

Definition at line 80 of file precision_cast.hpp.

cast_single_to_double()

void q3::precision::cast_single_to_double ( int  count, const ComplexSingle *  source, Complex *  destination  )

inline

Cast an array of single-precision complex values to double-precision.

Element-wise widening conversion: each ComplexSingle element is converted to Complex by zero-extending the mantissa.

Parameters

count	Number of elements to convert.
source	Input array of ComplexSingle (FP32) values.
destination	Output array of Complex (FP64) values. Must be pre-allocated with at least count elements.

Definition at line 53 of file precision_cast.hpp.