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

ID 790148
Date 3/22/2024
Public
Document Table of Contents

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