Provides commonly used functions and wrappers to CBLAS functions. More...

#include "common.h"
#include <tbb/scalable_allocator.h>

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Functions
double	activation_function (double Phi, int limit)
	????? More...

void	add_unique_elelement (std::vector< int > &involved_qbits, int qbit)
	Add an integer to a vector of integers if the integer is not already an element of the vector. More...

double	arg (const QGD_Complex16 &a)
	Call to retrieve the phase of a complex number. More...

void	conjugate_gradient (Matrix_real A, Matrix_real b, Matrix_real &x0, double tol)

Matrix	create_identity (int matrix_size)
	Call to create an identity matrix. More...

QGD_Complex16	mult (QGD_Complex16 &a, QGD_Complex16 &b)
	Call to calculate the product of two complex scalars. More...

QGD_Complex16	mult (double a, QGD_Complex16 b)
	calculate the product of a real scalar and a complex scalar More...

void	mult (QGD_Complex16 a, Matrix &b)
	Multiply the elements of matrix b by a scalar a. More...

Matrix	mult (Matrix_sparse a, Matrix &b)
	Multiply the elements of a sparse matrix a and a dense vector b. More...

int	Power_of_2 (int n)
	Calculates the n-th power of 2. More...

void *	qgd_calloc (int element_num, int size, int alignment)
	custom defined memory allocation function. More...

void	qgd_free (void *ptr)
	custom defined memory release function. More...

void *	qgd_realloc (void *aligned_ptr, int element_num, int size, int alignment)
	custom defined memory reallocation function. More...

Matrix	reduce_zgemm (std::vector< Matrix > &mtxs)
	Calculate the product of several square shaped complex matrices stored in a vector. More...

void	subtract_diag (Matrix &mtx, QGD_Complex16 scalar)
	Call to subtract a scalar from the diagonal of a complex matrix. More...

Detailed Description

Provides commonly used functions and wrappers to CBLAS functions.

Definition in file common.cpp.

Function Documentation

◆ activation_function()

double activation_function	(	double	Phi,
		int	limit
	)

?????

Definition at line 34 of file common.cpp.

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◆ add_unique_elelement()

void add_unique_elelement	(	std::vector< int > &	involved_qbits,
		int	qbit
	)

Add an integer to a vector of integers if the integer is not already an element of the vector.

The ascending order is kept during the process.

Parameters

involved_qbits	The vector of integer to be updated by the new integer. The result is returned via this vector.
qbit	The integer to be added to the vector

Definition at line 131 of file common.cpp.

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◆ arg()

double arg ( const QGD_Complex16 & a )

Call to retrieve the phase of a complex number.

Parameters

a	A complex numberr.

Definition at line 354 of file common.cpp.

◆ conjugate_gradient()

void conjugate_gradient	(	Matrix_real	A,
		Matrix_real	b,
		Matrix_real &	x0,
		double	tol
	)

Definition at line 395 of file common.cpp.

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◆ create_identity()

Matrix create_identity ( int matrix_size )

Call to create an identity matrix.

Parameters

matrix_size The number of rows in the resulted identity matrix

Returns: Returns with an identity matrix.

Definition at line 164 of file common.cpp.

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◆ mult() [1/4]

QGD_Complex16 mult	(	QGD_Complex16 &	a,
		QGD_Complex16 &	b
	)

Call to calculate the product of two complex scalars.

Parameters

a	The firs scalar
b	The second scalar

Returns: Returns with the calculated product.

Definition at line 259 of file common.cpp.

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◆ mult() [2/4]

QGD_Complex16 mult	(	double	a,
		QGD_Complex16	b
	)

calculate the product of a real scalar and a complex scalar

Parameters

a	The real scalar.
b	The complex scalar.

Returns: Returns with the calculated product.

Definition at line 275 of file common.cpp.

◆ mult() [3/4]

void mult	(	QGD_Complex16	a,
		Matrix &	b
	)

Multiply the elements of matrix b by a scalar a.

Parameters

a	A complex scalar.
b	A complex matrix.

Definition at line 292 of file common.cpp.

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◆ mult() [4/4]

Matrix mult	(	Matrix_sparse	a,
		Matrix &	b
	)

Multiply the elements of a sparse matrix a and a dense vector b.

Parameters

a	A complex sparse matrix in CSR format.
b	A complex dense vector.

Definition at line 313 of file common.cpp.

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◆ Power_of_2()

int Power_of_2 ( int n )

Calculates the n-th power of 2.

Parameters

n	An natural number

Returns: Returns with the n-th power of 2.

Definition at line 117 of file common.cpp.

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◆ qgd_calloc()

void* qgd_calloc	(	int	element_num,
		int	size,
		int	alignment
	)

custom defined memory allocation function.

Memory allocated with aligned realloc MUST be freed using qgd_free.

Parameters

element_num	The number of elements in the array to be allocated.
size	A size of one element (such as sizeof(double) )
alignment	The number of bytes to which memory must be aligned. This value must be <= 255.

Definition at line 74 of file common.cpp.

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◆ qgd_free()

void qgd_free ( void * ptr )

custom defined memory release function.

Definition at line 102 of file common.cpp.

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◆ qgd_realloc()

void* qgd_realloc	(	void *	aligned_ptr,
		int	element_num,
		int	size,
		int	alignment
	)

custom defined memory reallocation function.

Memory allocated with aligned realloc MUST be freed using qgd_free. The reallocation is done by either: a) expanding or contracting the existing area pointed to by aligned_ptr, if possible. The contents of the area remain unchanged up to the lesser of the new and old sizes. If the area is expanded, the contents of the new part of the array is set to zero. b) allocating a new memory block of size new_size bytes, copying memory area with size equal the lesser of the new and the old sizes, and freeing the old block.

Parameters

aligned_ptr	The aligned pointer created by qgd_calloc
element_num	The number of elements in the array to be allocated.
size	A size of one element (such as sizeof(double) )
alignment	The number of bytes to which memory must be aligned. This value must be <= 255.

Definition at line 90 of file common.cpp.

◆ reduce_zgemm()

Matrix reduce_zgemm ( std::vector< Matrix > & mtxs )

Calculate the product of several square shaped complex matrices stored in a vector.

Parameters

mtxs	The vector of matrices.
matrix_size	The number rows in the matrices

Returns: Returns with the calculated product matrix

Definition at line 189 of file common.cpp.

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◆ subtract_diag()

void subtract_diag	(	Matrix &	mtx,
		QGD_Complex16	scalar
	)

Call to subtract a scalar from the diagonal of a complex matrix.

Parameters

mtx	The input-output matrix
scalar	The complex scalar to be subtracked from the diagonal elements of the matrix

Definition at line 238 of file common.cpp.

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Functions

Detailed Description

Function Documentation

◆ activation_function()

◆ add_unique_elelement()

◆ arg()

◆ conjugate_gradient()

◆ create_identity()

◆ mult() [1/4]

◆ mult() [2/4]

◆ mult() [3/4]

◆ mult() [4/4]

◆ Power_of_2()

◆ qgd_calloc()

◆ qgd_free()

◆ qgd_realloc()

◆ reduce_zgemm()

◆ subtract_diag()