Intel® Integrated Performance Primitives Developer Guide and Reference

ID 790148
Date 11/07/2023
Public

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Document Table of Contents

CopyLE, CopyBE

Copies the contents of one bit vector into another.

Syntax

IppStatus ippsCopyLE_1u(const Ipp8u* pSrc, int srcBitOffset, Ipp8u* pDst, int dstBitOffset, int len);

IppStatus ippsCopyBE_1u(const Ipp8u* pSrc, int srcBitOffset, Ipp8u* pDst, int dstBitOffset, int len);

Include Files

ipps.h

Domain Dependencies

Headers: ippcore.h, ippvm.h

Libraries: ippcore.lib, ippvm.lib

Parameters

pSrc

Pointer to the source vector.

pDst

Pointer to the destination vector.

len

Number of elements to copy.

srcBitOffset

Offset, in bits, from the first byte of the source vector.

dstBitOffset

Offset, in bits, from the first byte of the destination vector.

Description

This function copies the first len elements from a source vector pSrc into a destination vector pDst.

These functions copy elements of a vector that has a 8u data type. It means that each byte consists of eight consecutive elements of the vector (1 bit per element). You need to specify the start position of the source and destination vectors in the srcBitOffset and dstBitOffset parameters, respectively.

For the ippsCopyLE_1u function, the bit order of each byte is inverse to the element order. It means that the first element in a vector represents the last (seventh) bit of the first byte in a vector, as shown in the figure below.

Bit Layout for the ippsCopyLE_1u Function

For the ippsCopyBE_1u function, the bit order of each byte is ordinary. It means that the first element in a vector represents the last (zero) bit of the first byte in a vector, as shown in the figure below.

Bit Layout for the ippsCopyBE_1u Function

Return Values

ippStsNoErr

Indicates no error.

ippStsNullPtrErr

Indicates an error when the pSrc or pDst pointer is NULL.

ippStsSizeErr

Indicates an error when:
  • len is less than, or equal to zero

  • srcBitOffset or dstBitOffset is less than zero