Intel® Integrated Performance Primitives (Intel® IPP) Developer Guide and Reference

ID 790148
Date 3/22/2024
Public

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Document Table of Contents

Tan

Computes tangent of each vector element.

Syntax

IppStatus ippsTan_32f_A11 (const Ipp32f* pSrc, Ipp32f* pDst, Ipp32s len);

IppStatus ippsTan_32f_A21 (const Ipp32f* pSrc, Ipp32f* pDst, Ipp32s len);

IppStatus ippsTan_32f_A24 (const Ipp32f* pSrc, Ipp32f* pDst, Ipp32s len);

IppStatus ippsTan_64f_A26 (const Ipp64f* pSrc, Ipp64f* pDst, Ipp32s len);

IppStatus ippsTan_64f_A50 (const Ipp64f* pSrc, Ipp64f* pDst, Ipp32s len);

IppStatus ippsTan_64f_A53 (const Ipp64f* pSrc, Ipp64f* pDst, Ipp32s len);

IppStatus ippsTan_32fc_A11 (const Ipp32fc* pSrc, Ipp32fc* pDst, Ipp32s len);

IppStatus ippsTan_32fc_A21 (const Ipp32fc* pSrc, Ipp32fc* pDst, Ipp32s len);

IppStatus ippsTan_32fc_A24 (const Ipp32fc* pSrc, Ipp32fc* pDst, Ipp32s len);

IppStatus ippsTan_64fc_A26 (const Ipp64fc* pSrc, Ipp64fc* pDst, Ipp32s len);

IppStatus ippsTan_64fc_A50 (const Ipp64fc* pSrc, Ipp64fc* pDst, Ipp32s len);

IppStatus ippsTan_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 computes the tangent of each element of pSrc, and stores the result in the corresponding element of pDst.

For single precision data:

function flavors ippsTan_32f_A11and ippsTan_32cf_A11 guarantee 11 correctly rounded bits of significand, or at least 3 exact decimal digits;

function flavors ippsTan_32f_A21 and ippsTan_32fc_A21 guarantee 21 correctly rounded bits of significand, or 4 ulps, or about 6 exact decimal digits;

function flavors ippsTan_32f_A24 and ippsTan_32fc_A24 guarantee 24 correctly rounded bits of significand, including the implied bit, with the maximum guaranteed error within 1 ulp.

For double precision data:

function flavors ippsTan_64f_A26 and ippsTan_64fc_A26 guarantee 26 correctly rounded bits of significand, or 6.7E+7 ulps, or approximately 8 exact decimal digits;

function flavors ippsTan_64f_A50 and ippsTan_64fc_A50 guarantee 50 correctly rounded bits of significand, or 4 ulps, or approximately 15 exact decimal digits;

function flavors ippsTan_64f_A53 and ippsTan_64fc_A53 guarantee 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] = tan(pSrc[n]), 0 ≤ n < len.

Return Values

ippStsNoErr

Indicates no error.

ippStsNullPtrErr

Indicates an error when pSrc or pDst pointer is NULL.

ippStsSizeErr

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

IppStsDomain

In real functions, indicates a warning that the argument is out of the function domain, that is, at least one of the elements of pSrc is equal to ± INF.

Example

The example below shows how to use the function ippsTan.

IppStatus ippsTan_32f_A21_sample(void) {
	const Ipp32f x[4] = {7519.456, 4533.524, 9118.015, 8514.359};
	Ipp32f y[4];
	IppStatus st = ippsTan_32f_A21( x, y, 4 );
	
	printf(" ippsTan_32f_A21:\n");
	printf(" x = %.3f %.3f %.3f %.3f \n", x[0], x[1], x[2], x[3]);
	printf(" y = %.3f %.3f %.3f %.3f \n", y[0], y[1], y[2], y[3]);
	return st;
} 

Output:

 
ippsTan_32f_A21:
x = 7519.456 4533.524 9118.015 8514.359
y = -18.656 0.209 2.028 0.750