Visible to Intel only — GUID: GUID-4285E5A6-5E26-4EBD-ADA9-C68BA93A7295
Visible to Intel only — GUID: GUID-4285E5A6-5E26-4EBD-ADA9-C68BA93A7295
Inv
Computes inverse value of each vector element.
Syntax
IppStatus ippsInv_32f_A11 (const Ipp32f* pSrc, Ipp32f* pDst, Ipp32s len);
IppStatus ippsInv_32f_A21 (const Ipp32f* pSrc, Ipp32f* pDst, Ipp32s len);
IppStatus ippsInv_32f_A24 (const Ipp32f* pSrc, Ipp32f* pDst, Ipp32s len);
IppStatus ippsInv_64f_A26 (const Ipp64f* pSrc, Ipp64f* pDst, Ipp32s len);
IppStatus ippsInv_64f_A50 (const Ipp64f* pSrc, Ipp64f* pDst, Ipp32s len);
IppStatus ippsInv_64f_A53 (const Ipp64f* pSrc, Ipp64f* 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 inverse value of each element of the vector pSrc, and stores the result in the corresponding element of the vector pDst.
For single precision data:
function flavor ippsInv_32f_A11 guarantees 11 correctly rounded bits of significand, or at least 3 exact decimal digits;
function flavor ippsInv_32f_A21 guarantees 21 correctly rounded bits of significand, or 4 ulps, or about 6 exact decimal digits;
function flavor ippsInv_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 ippsInv_64f_A26 guarantees 26 correctly rounded bits of significand, or 6.7E+7 ulps, or approximately 8 exact decimal digits;
function flavor ippsInv_64f_A50 guarantees 50 correctly rounded bits of significand, or 4 ulps, or approximately 15 exact decimal digits;
function flavor ippsInv_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:
pDst[n] = 1/(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. |
IppStsSingularity |
Indicates a warning that the argument is the singularity point, that is, at least one of the elements of pSrc is equal to 0. |
Example
The example below shows how to use the function ippsInv.
IppStatus ippsInv_32f_A21_sample(void) { const Ipp32f x[4] = {-9.975, 1.272, -6.134, 6.175}; Ipp32f y[4]; IppStatus st = ippsInv_32f_A21( x, y, 4 ); printf(" ippsInv_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:
ippsInv_32f_A21: x = -9.975 1.272 -6.134 6.175 y = -0.100 0.786 -0.163 0.162