Developer Reference

Contents

PRNGenRDRAND

Generates a pseudorandom unsigned Big Number of the specified bit length using the RDRAND instruction.

Syntax

IppStatus ippsPRNGenRDRAND(Ipp32u*
pRand
, int
nBits
, void*
pCtx
);
Include Files
ippcp.h
Parameters
pRand
Pointer to the output pseudorandom unsigned integer big number.
nBits
The number of generated pseudorandom bits.
pCtx
Pointer to the
IppsPRNGState
context. This pointer is unused and can be
NULL
.
Description
The function generates a pseudorandom unsigned integer big number of the specified
nBits
length. The generation is based on the RDRAND instruction available on latest Intel® processors [INTEL_ARCH].
Optimization Notice
Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.
Notice revision #20110804
Return Values
ippStsNoErr
Indicates no error. Any other value indicates an error or warning.
ippStsNullPtrErr
Indicates an error condition if any of the specified pointers is
NULL
.
ippStsContextMatchErr
Indicates an error condition if the context parameter does not match the operation.
ippStsLengthErr
Indicates an error condition if
nBits
is less than 1.
ippStsNotSupportedModeErr
Indicates an error condition if the RDRAND instruction is not available on the target processor.

Product and Performance Information

1

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