Developer Reference

Contents

Sub_BN

Subtracts one integer big number from another.

Syntax

IppStatus ippsSub_BN(IppsBigNumState*
pA
, IppsBigNumState*
pB
, IppsBigNumState*
pR
);
Include Files
ippcp.h
Parameters
pA
Pointer to the first integer big number of the data type
IppsBigNumState
.
pB
Pointer to the second integer big number of the data type
IppsBigNumState
.
pR
Pointer to the subtraction result.
Description
The function subtracts one integer big number from another regardless of their signs and sizes and returns the result of the operation.
The following pseudocode represents this function:
(*
pR
)
(*
pA
) - (*
pB
).
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
.
ippStsOutOfRangeErr
Indicates an error condition if
IppsBigNumState *
pR
is smaller than the result data length.
ippStsContextMatchErr
Indicates an error condition if any of the context parameters does not match the operation.
The function executes only under the condition that size of
IppsBigNumState *
pR
is not less than either the length of
IppsBigNumState *
pA
or that of
IppsBigNumState *
pB
.

Product and Performance Information

1

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