Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

ID 766686
Date 3/22/2024
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents

vRngUniformBits64

Generates uniformly distributed bits in 64-bit chunks.

Syntax

status = virnguniformbits64( method, stream, n, r )

Include Files

  • mkl.fi, mkl_vsl.f90

Input Parameters

Name

Type

Description

method

INTEGER, INTENT(IN)

Generation method; the specific value is

VSL_RNG_METHOD_UNIFORMBITS64_STD

stream

TYPE (VSL_STREAM_STATE), INTENT(IN)

Descriptor of the stream state structure.

n

INTEGER, INTENT(IN)

Number of random values to be generated

Output Parameters

Name

Type

Description

r

INTEGER (KIND=8), INTENT(OUT)

Vector of n 64-bit random integer numbers with uniform bit distribution.

Description

The vRngUniformBits64 function generates uniformly distributed bits in 64-bit chunks. Unlike vRngUniformBits, which provides the output of underlying integer recurrence and does not guarantee uniform distribution across bits, vRngUniformBits64 is designed to ensure each bit in the 64-bit chunk is uniformly distributed. See VS Notes for details.

Product and Performance Information

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.

Notice revision #20201201

Return Values

VSL_ERROR_OK, VSL_STATUS_OK

Indicates no error, execution is successful.

VSL_ERROR_NULL_PTR

stream is a NULL pointer.

VSL_RNG_ERROR_BAD_STREAM

stream is not a valid random stream.

VSL_RNG_ERROR_BRNG_NOT_SUPPORTED

BRNG is not supported by the function.

VSL_RNG_ERROR_NONDETERM_NRETRIES_EXCEEDED

Number of retries to generate a random number by using non-deterministic random number generator exceeds threshold.

VSL_RNG_ERROR_ARS5_NOT_SUPPORTED

ARS-5 random number generator is not supported on the CPU running the application.