connection_generator_fixed_total.h File Reference

Fixed-Total-Number (Multapse) Connection generator implementation. More...

#include <log.h>
#include <synapse_expander/rng.h>
#include <synapse_expander/generator_types.h>

Go to the source code of this file.

Data Structures
struct	fixed_total_params
	The parameters that can be copied from SDRAM. More...
struct	fixed_total
	The data to be passed around. More...

Functions
static void *	connection_generator_fixed_total_initialise (void **region)
	Draw from a binomial distribution i.e. with replacement. More...
static void	connection_generator_fixed_total_free (void *generator)
	Free the fixed-total connection generator. More...
static uint32_t	random_in_range (rng_t *rng, uint32_t range)
static void	fixed_total_next (uint32_t *pre, uint32_t *post, uint32_t pre_lo, uint32_t pre_hi)
static bool	connection_generator_fixed_total_generate (void *generator, uint32_t pre_lo, uint32_t pre_hi, uint32_t post_lo, uint32_t post_hi, uint32_t post_index, uint32_t post_slice_start, uint32_t post_slice_count, unsigned long accum weight_scale, accum timestep_per_delay, param_generator_t weight_generator, param_generator_t delay_generator, matrix_generator_t matrix_generator)
	Generate connections with the fixed-total connection generator. More...

Detailed Description

Fixed-Total-Number (Multapse) Connection generator implementation.

Definition in file connection_generator_fixed_total.h.

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Data Structure Documentation

fixed_total_params

struct fixed_total_params

The parameters that can be copied from SDRAM.

Definition at line 27 of file connection_generator_fixed_total.h.

Data Fields
uint32_t	allow_self_connections
uint32_t	with_replacement
uint32_t	n_synapses_total

fixed_total

struct fixed_total

The data to be passed around.

This includes the parameters, and the RNG of the connector.

Definition at line 41 of file connection_generator_fixed_total.h.

Data Fields
struct fixed_total_params	params
uint16_t *	n_connections_per_core

Function Documentation

connection_generator_fixed_total_initialise()

static void* connection_generator_fixed_total_initialise ( void **  region )

static

Draw from a binomial distribution i.e. with replacement.

Parameters

[in]	n	The number of times the experiment is run
[in]	N	The number of items in the bag
[in]	K	The number of items that are valid
[in]	rng	The uniform random number generator

Returns

The number of times a valid item was drawn

Draw from a hyper-geometric distribution i.e. without replacement

Parameters

[in]	n	The number of times the experiment is run
[in]	N	The number of items in the bag at the start
[in]	K	The number of valid items in the bag at the start
[in]	rng	The uniform random number generator

Returns

The number of times a valid item was drawn

Initialise the fixed-total connection generator

Parameters

[in,out]

region

Region to read parameters from. Should be updated to position just after parameters after calling.

Returns

A data item to be passed in to other functions later on

Definition at line 100 of file connection_generator_fixed_total.h.

connection_generator_fixed_total_free()

static void connection_generator_fixed_total_free ( void *  generator )

static

Free the fixed-total connection generator.

Parameters

[in]

generator

The generator to free

Definition at line 140 of file connection_generator_fixed_total.h.

connection_generator_fixed_total_generate()

static bool connection_generator_fixed_total_generate ( void *  generator, uint32_t  pre_lo, uint32_t  pre_hi, uint32_t  post_lo, uint32_t  post_hi, uint32_t  post_index, uint32_t  post_slice_start, uint32_t  post_slice_count, unsigned long accum  weight_scale, accum  timestep_per_delay, param_generator_t  weight_generator, param_generator_t  delay_generator, matrix_generator_t  matrix_generator  )

static

Generate connections with the fixed-total connection generator.

Parameters

[in]	generator	The generator to use to generate connections
[in]	pre_slice_start	The start of the slice of the pre-population being generated
[in]	pre_slice_count	The number of neurons in the slice of the pre-population being generated
[in]	pre_neuron_index	The index of the neuron in the pre-population being generated
[in]	post_slice_start	The start of the slice of the post-population being generated
[in]	post_slice_count	The number of neurons in the slice of the post-population being generated
[in]	max_row_length	The maximum number of connections to generate
[in,out]	indices	An array into which the core-relative post-indices should be placed. This will be initialised to be max_row_length in size

Returns

The number of connections generated

Definition at line 177 of file connection_generator_fixed_total.h.