double_m Class Reference

Detailed Description

Mask object to use with double_v objects.

#include <Vc/double_v>

Public Member Functions
	double_m ()
	default constructor
	double_m (Vc::Zero)
	Constructs a mask with the entries initialized to zero.
	double_m (Vc::One)
	Constructs a mask with the entries initialized to one.
	double_m (bool b)
	Constructs a mask with the entries initialized to.
	double_m (const double_m &)
	Standard copy constructor.
template<typename OtherMask >
	double_m (const OtherMask &)
	Constructs a mask object from a mask of different size/type.
bool	operator== (const double_m &) const
	Returns whether the two masks are equal in all entries.
bool	operator!= (const double_m &) const
	Returns whether the two masks differ in at least one entry.
double_m	operator&& (const double_m &) const
	Return the per-entry resulting mask of a logical (in this case same as bitwise) AND operation.
double_m	operator& (const double_m &) const
	Return the per-entry resulting mask of a logical (in this case same as bitwise) AND operation.
double_m	operator|| (const double_m &) const
	Return the per-entry resulting mask of a logical (in this case same as bitwise) OR operation.
double_m	operator| (const double_m &) const
	Return the per-entry resulting mask of a logical (in this case same as bitwise) OR operation.
double_m	operator^ (const double_m &) const
	Return the per-entry resulting mask of a logical (in this case same as bitwise) XOR operation.
double_m	operator! () const
	Return the per-entry resulting mask of a logical (in this case same as bitwise) NOT operation.
double_m	operator&= (const double_m &)
	Modify the mask per-entry using a logical (in this case same as bitwise) AND operation.
double_m	operator|= (const double_m &)
	Modify the mask per-entry using a logical (in this case same as bitwise) OR operation.
bool	isFull () const
	Return whether all entries of the mask are one.
bool	isEmpty () const
	Return whether all entries of the mask are zero.
bool	isMix () const
	Return whether the mask is neither full nor empty.
	operator bool () const
	Cast to bool operator.
bool	operator[] (int i) const
	Read-only access to mask entries.
int	count () const
	Return how many entries of the mask are set to one.
int	firstOne () const
	Returns the index of the first one in the mask.
int	toInt () const
	Convert mask to an integer.

Constructor & Destructor Documentation

double_m

(

)

default constructor

Leaves the mask uninitialized.

double_m ( bool  b )

explicit

Constructs a mask with the entries initialized to.

• one if b is true
• zero if b is false

Parameters

b	Determines the initial state of the mask.

Member Function Documentation

operator bool

(

)

const

Cast to bool operator.

Returns the same as isFull().

Warning

Be careful with the cast to bool. Often it is better to write explicitly whether you want isFull or !isEmpty or something else. If you define VC_NO_AUTOMATIC_BOOL_FROM_MASK this operator will be disabled, requiring you to explicitly reduce masks to bools.

bool operator[]

(

int

i

)

const

Read-only access to mask entries.

Parameters

i	Determines the boolean to be accessed.

Returns

the i th entry of the mask as a bool.

int toInt

(

)

const

Convert mask to an integer.

Returns

An int where each bit corresponds to the boolean value in the mask.

E.g. a mask like [true, false, false, true] would result in a 9 (in binary: 1001).