Visible to Intel only — GUID: GUID-80CFCD4D-4A47-4775-8CD4-613951B0B026
Visible to Intel only — GUID: GUID-80CFCD4D-4A47-4775-8CD4-613951B0B026
Sum
Computes the sum of the elements of a vector.
Syntax
IppStatus ippsSum_32f(const Ipp32f* pSrc, int len, Ipp32f* pSum, IppHintAlgorithm hint);
IppStatus ippsSum_32fc(const Ipp32fc* pSrc, int len, Ipp32fc* pSum, IppHintAlgorithm hint);
IppStatus ippsSum_64f(const Ipp64f* pSrc, int len, Ipp64f* pSum);
IppStatus ippsSum_64fc(const Ipp64fc* pSrc, int len, Ipp64fc* pSum);
IppStatus ippsSum_16s_Sfs(const Ipp16s* pSrc, int len, Ipp16s* pSum, int scaleFactor);
IppStatus ippsSum_32s_Sfs(const Ipp32s* pSrc, int len, Ipp32s* pSum, int scaleFactor);
IppStatus ippsSum_16s32s_Sfs(const Ipp16s* pSrc, int len, Ipp32s* pSum, int scaleFactor);
IppStatus ippsSum_16sc_Sfs(const Ipp16sc* pSrc, int len, Ipp16sc* pSum, int scaleFactor);
IppStatus ippsSum_16sc32sc_Sfs(const Ipp16sc* pSrc, int len, Ipp32sc* pSum, int scaleFactor);
Include Files
ipps.h
Domain Dependencies
Headers: ippcore.h, ippvm.h
Libraries: ippcore.lib, ippvm.lib
Parameters
pSrc |
Pointer to the source vector. |
pSum |
Pointer to the output result. |
len |
Number of elements in the vector. |
hint |
Suggests using specific code. The possible values for the hint argument are described in Hint Arguments. |
scaleFactor |
Scale factor, refer to Integer Scaling. |
Description
This function computes the sum of the elements of the vector pSrc and stores the result in pSum.
The sum of the elements of pSrc is defined by the formula:
The hint argument suggests using specific code, either faster but less accurate calculation, or more accurate but slower calculation.
When computing the sum of integer numbers, the output result can exceed the data range and become saturated. To get a precise result, use the scale factor. The scaling is performed in accordance with the scaleFactor value.
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error when the pSum or pSrc 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 ippsSum.
void sum(void) { Ipp16s x[4] = {-32768, 32767, 32767, 32767}, sm; ippsSum_16s_Sfs(x, 4, &sm, 1); printf_16s("sum =", &sm, 1, ippStsNoErr); }
Output:
sum = 32766 Matlab* Analog: >> x = [-32768, 32767, 32767, 32767]; sum(x)/2