GFpSub_PE
GFpSub_PE
Subtracts an element of the finite field from an element of its parent field.
Syntax
IppStatus ippsGFpSub_PE(const IppsGFpElement*
pA
, const IppsGFpElement*
pParentB
, IppsGFpElement*
pR
, IppsGFpState*
pGFp
);
Include Files
ippcp.h
Parameters
- pA
- Pointer to the context of the minuend, an element of the finite field.
- pParentB
- Pointer to the context of the subtrahend, an element of the parent finite field.
- pR
- Pointer to the context of the resulting element of the finite field.
- pGFp
- Pointer to the context of the finite field.
Description
This function computes the difference of the elements of the finite field specified by the context
pGFp
and its ground finite field. The following pseudocode represents this operation: R = A - B
.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 isNULL.
- ippStsContextMatchErr
- Indicates an error condition if any ofIppsGFpStateandIppsGFpElementcontext parameters does not match the operation.
- ippStsOutOfRangeErr
- Indicates an error condition in the following cases:
- The elementpAdoes not belong to the finite field specified by the contextpGFp.
- The elementpParentBdoes not belong to the ground field of the finite field specified by the contextpGFp.
- ippStsBadArgErr
- Indicates an error condition if the contextpGFpdoes not specify a prime field.