Intel® Integrated Performance Primitives Developer Guide and Reference

ID 790148
Date 11/07/2023
Public

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Document Table of Contents

Conj

Performs element by element conjugation of the vector.

Syntax

IppStatus ippsConj_32fc_A24 (const Ipp32fc* pSrc, Ipp32fc* pDst, Ipp32s len);

IppStatus ippsConj_64fc_A53 (const Ipp64fc* pSrc, Ipp64fc* pDst, Ipp32s len);

Include Files

ippvm.h

Domain Dependencies

Headers: ippcore.h

Libraries: ippcore.lib

Parameters

pSrc

Pointer to the source vector.

pDst

Pointer to the destination vector.

len

Number of elements in the vectors.

Description

This function performs element by element conjugation of the vector pSrc and stores the result in the corresponding element of the vector pDst.

For single precision data:

function flavor ippsConj_32fc_A24 guarantees 24 correctly rounded bits of significand, including the implied bit, with the maximum guaranteed error within 1 ulp.

For double precision data:

function flavor ippsConj_64fc_A53 guarantees 53 correctly rounded bits of significand, including the implied bit, with the maximum guaranteed error within 1 ulp.

The computation is performed as follows:

pDst[n] = CONJ(pSrc[n]), 0 ≤ n < len.

Return Values

ippStsNoErr

Indicates no error.

ippStsNullPtrErr

Indicates an error when pSrc1, pSrc2 or pDst pointer is NULL.

ippStsSizeErr

Indicates an error when len is less than or equal to 0.

Example

The example below shows how to use the function ippsConj.

IppStatus ippsConj_32fc_A24_sample(void) {
	const Ipp32fc x[2] = {{+2.885,-1.809}, {-0.543,-2.809}};
	Ipp32fc  y[2];
	IppStatus st = ippsConj_32fc_A24( x, y, 2 );
	
	printf(" ippsConj_32fc_A24:\n");
	printf(" x = %+.3f%+.3f*i   %+.3f%+.3f*i \n", x[0].re, x[0].im, x[1].re, x[1].im);
	printf(" y = %+.3f%+.3f*i   %+.3f%+.3f*i \n", y[0].re, y[0].im, y[1].re, y[1].im);
	return st;
}

Output:

 
ippsConj_32fc_A24:
x = +2.885-1.809*i   -0.543-2.809*i
y = +2.885+1.809*i   -0.543+2.809*i