connection_generator_fixed_post.h File Reference

Fixed-Number-Post (fan-out) Connection generator implementation. More...

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

Go to the source code of this file.

Data Structures
struct	fixed_post_params
	The parameters that can be copied from SDRAM. More...
struct	fixed_post
	The state of this connection generator. More...

Functions
static void *	connection_generator_fixed_post_initialise (void **region)
	Initialise the fixed-post connection generator.
static void	connection_generator_fixed_post_free (void *generator)
	Free the fixed-post connection generator.
static uint32_t	post_random_in_range (rng_t *rng, uint32_t range)
	Generates a uniformly-distributed random number.
static bool	fixed_post_write (uint32_t pre, uint32_t post, accum weight_scale, accum timestep_per_delay, param_generator_t weight_generator, param_generator_t delay_generator, matrix_generator_t matrix_generator)
static bool	connection_generator_fixed_post_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-post connection generator.

Detailed Description

Fixed-Number-Post (fan-out) Connection generator implementation.

Each post-neuron is connected to exactly n_pre pre-neurons (chosen at random)

Definition in file connection_generator_fixed_post.h.

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Data Structure Documentation

fixed_post_params

struct fixed_post_params

The parameters that can be copied from SDRAM.

Definition at line 28 of file connection_generator_fixed_post.h.

Data Fields
uint32_t	allow_self_connections	Do we allow self connections?
uint32_t	with_replacement	Do we allow any neuron to be multiply connected by this connector?
uint32_t	n_post	Number of connections per pre-neuron in total.

fixed_post

struct fixed_post

The state of this connection generator.

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

Definition at line 42 of file connection_generator_fixed_post.h.

Data Fields
struct fixed_post_params	params	Parameters read from SDRAM.

Function Documentation

connection_generator_fixed_post_initialise()

static void * connection_generator_fixed_post_initialise ( void **  region )

static

Initialise the fixed-post 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 53 of file connection_generator_fixed_post.h.

connection_generator_fixed_post_free()

static void connection_generator_fixed_post_free ( void *  generator )

static

Free the fixed-post connection generator.

Parameters

[in]

generator

The data to free

Definition at line 73 of file connection_generator_fixed_post.h.

post_random_in_range()

static uint32_t post_random_in_range ( rng_t *  rng, uint32_t  range  )

static

Generates a uniformly-distributed random number.

Parameters

[in]	rng	the RNG to generate with
[in]	range	the (upper, exclusive) limit of the range of random numbers that may be generated. Should be in range 0..65536

Returns

a random integer in the given input range.

Definition at line 84 of file connection_generator_fixed_post.h.

fixed_post_write()

static bool fixed_post_write ( uint32_t  pre, uint32_t  post, accum  weight_scale, accum  timestep_per_delay, param_generator_t  weight_generator, param_generator_t  delay_generator, matrix_generator_t  matrix_generator  )

static

Definition at line 89 of file connection_generator_fixed_post.h.

connection_generator_fixed_post_generate()

static bool connection_generator_fixed_post_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-post 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 118 of file connection_generator_fixed_post.h.