Arbiter< size_, ArbiterType > Class Template Reference

A generalized implementation of generic n-way roundrobin arbiter. More...

#include <Arbiter.h>

Public Member Functions
typedef	NVUINTW (size_) Mask
void	reset ()
Mask	pick (const Mask &valid)

Protected Types
enum	_ { UNROLLED_SIZE = 2 * size_ - 1 , log_unrolled_size = nvhls::log2_ceil<UNROLLED_SIZE>::val , log_size = nvhls::log2_ceil<size_>::val }

Protected Member Functions
typedef	NVUINTW (UNROLLED_SIZE) UnrolledMask

Protected Attributes
Mask	next

Detailed Description

template<unsigned int size_, arbiter_type ArbiterType = Roundrobin>
class Arbiter< size_, ArbiterType >

A generalized implementation of generic n-way roundrobin arbiter.

Template Parameters

size_	Number of elements to be arbitrated.
ArbiterType	Selecting arbitration method. Current class implements Roundrobin, and a dedicated class implements Static. (default: Roundrobin).

Overview

• Given a vector indicating which elements are currently valid for selection, and previous selection, a new selection will be made.
• Once a selection is made internal state is updated.
• Selection is returned in form of a one-hot bitmask.
• In case no entry is valid a zero selection mask will be returned.

A Simple Example

#include <Arbiter.h>
 
...
Arbiter<4> arbiter;
arbiter.reset(); // optional in this case, suitable if arbiter is a class member rather than local variable
 
while (1) {
    ...
    Arbiter<4>::Mask active = ~0; // active mask is set, in this case all set to active
    Arbiter<4>::Mask select = arbiter.pick(active);
    ...
};

Definition at line 61 of file Arbiter.h.

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The documentation for this class was generated from the following file:

• Arbiter.h