SinCos

Computes sine and cosine of each vector element.

Syntax

IppStatus ippsSinCos_32f_A11 (const Ipp32f* pSrc, const Ipp32f* pDst1, Ipp32f* pDst2, Ipp32s len);

IppStatus ippsSinCos_32f_A21 (const Ipp32f* pSrc, const Ipp32f* pDst1, Ipp32f* pDst2, Ipp32s len);

IppStatus ippsSinCos_32f_A24 (const Ipp32f* pSrc, const Ipp32f* pDst1, Ipp32f* pDst2, Ipp32s len);

IppStatus ippsSinCos_64f_A26 (const Ipp64f* pSrc, const Ipp64f* pDst1, Ipp64f* pDst2, Ipp32s len);

IppStatus ippsSinCos_64f_A50 (const Ipp64f* pSrc, const Ipp64f* pDst1, Ipp64f* pDst2, Ipp32s len);

IppStatus ippsSinCos_64f_A53 (const Ipp64f* pSrc, const Ipp64f* pDst1, Ipp64f* pDst2, Ipp32s len);

Parameters

pSrc	Pointer to the first source vector.
pDst1	Pointer to the destination vector for sine values.
pDst2	Pointer to the destination vector for cosine values.
len	Number of elements in the vectors.

Description

The function ippsSinCos is declared in the ippvm.h file. This function computes sine of each element of pSrc and stores the result in the corresponding element of pDst1; computes cosine of each element of pSrc and stores the result in the corresponding element of pDst2.

For single precision data:

function flavor ippsSinCos_32f_A11 guarantees 11 correctly rounded bits of significand, or at least 3 exact decimal digits;

function flavor ippsSinCos_32f_A21 guarantees 21 correctly rounded bits of significand, or 4 ulps, or about 6 exact decimal digits;

function flavor ippsSinCos_32f_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 ippsSinCos_64f_A26 guarantees 26 correctly rounded bits of significand, or 6.7E+7 ulps, or approximately 8 exact decimal digits;

function flavor ippsSinCos_64f_A50 guarantees 50 correctly rounded bits of significand, or 4 ulps, or approximately 15 exact decimal digits;

function flavor ippsSinCos_64f_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:

pDst1[n] = sin(pSrc[n]), pDst2[n] = cos(pSrc[n]), 0 ≤ n < len.

The example below shows how to use the function ippsSinCos.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when pDst1 or pDst2 or pSrc 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 pSrc elements is equal to ± INF.

Using ippsSinCos Function

IppStatus ippsSinCos_32f_A21_sample(void)

const Ipp32f x[4] = {3857.845, -3939.024, -1468.856, -8592.486};

Ipp32f      	y1[4];

Ipp32f      	y2[4];

	IppStatus st = ippsSinCos_32f_A21( x, y1, y2, 4 );

	printf(" ippsSinCos_32f_A21:\n");

	printf(" x  = %.3f %.3f %.3f %.3f \n", x[0],  x[1],  x[2],  x[3]);

	printf(" y1 = %.3f %.3f %.3f %.3f \n", y1[0], y1[1], y1[2], y1[3]);

	printf(" y2 = %.3f %.3f %.3f %.3f \n", y2[0], y2[1], y2[2], y2[3]);

	return st;

Output results:

 ippsSinCos_32f_A21:

 x  = 3857.845 -3939.024 -1468.856 -8592.486

 y1 = -0.031 0.508 0.987 0.228

 y2 = 1.000 0.861 0.161 -0.974