MTGP  1.1.1
Data Fields
MTGP32_PARAMS_FAST_T Struct Reference

MTGP32 parameters. More...

#include <mtgp32-fast.h>

Data Fields

int mexp
 Mersenne exponent.
int pos
 pick up position.
int sh1
 shift value 1.
int sh2
 shift value 2.
uint32_t tbl [16]
 a small matrix.
uint32_t tmp_tbl [16]
 a small matrix for tempering.
uint32_t flt_tmp_tbl [16]
 a small matrix for tempering and converting to float.
uint32_t mask
 This is a mask for state space.
unsigned char poly_sha1 [21]
 SHA1 digest.

Detailed Description

MTGP32 parameters.

Some element is redundant to keep structure simple.

pos is a pick up position which is selected to have good performance on graphic processors. 3 < pos < Q, where Q is a maximum number such that the size of status array - Q is a power of

  1. For example, when mexp is 44497, size of 32-bit status array is 696, and Q is 184, then pos is between 4 and 183. This means 512 parallel calculations is allowed when mexp is 44497.

poly_sha1 is SHA1 digest of the characteristic polynomial of state transition function. SHA1 is calculated based on printing form of the polynomial. This is important when we use parameters generated by the dynamic creator which

mask This is a mask to make the dimension of state space have just Mersenne Prime. This is redundant.


Field Documentation

uint32_t MTGP32_PARAMS_FAST_T::flt_tmp_tbl[16]

a small matrix for tempering and converting to float.

Referenced by mtgp32_genrand_close1_open2(), and mtgp32_genrand_open_open().

uint32_t MTGP32_PARAMS_FAST_T::mask

This is a mask for state space.

Referenced by mtgp32_next_state().

int MTGP32_PARAMS_FAST_T::mexp

Mersenne exponent.

This is redundant.

Referenced by alloc_state(), mtgp32_init_by_array(), mtgp32_init_by_str(), mtgp32_init_state(), and mtgp32_print_idstring().

unsigned char MTGP32_PARAMS_FAST_T::poly_sha1[21]

SHA1 digest.

Referenced by mtgp32_print_idstring().

int MTGP32_PARAMS_FAST_T::pos
int MTGP32_PARAMS_FAST_T::sh1

shift value 1.

0 < sh1 < 32.

Referenced by mtgp32_next_state().

int MTGP32_PARAMS_FAST_T::sh2

shift value 2.

0 < sh2 < 32.

Referenced by mtgp32_next_state().

uint32_t MTGP32_PARAMS_FAST_T::tbl[16]
uint32_t MTGP32_PARAMS_FAST_T::tmp_tbl[16]

a small matrix for tempering.

Referenced by mtgp32_genrand_uint32().


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