Developer Reference

  • 2020
  • 10/21/2020
  • Public Content
Contents

MulPack

Multiply the elements of two vectors stored in
Pack
format.

Syntax

Case 1: Not-in-place operation
IppStatus ippsMulPack_32f(const Ipp32f*
pSrc1
, const Ipp32f*
pSrc2
, Ipp32f*
pDst
, int
len
);
IppStatus ippsMulPack_64f(const Ipp64f*
pSrc1
, const Ipp64f*
pSrc2
, Ipp64f*
pDst
, int
len
);
Case 2: In-place operation
IppStatus ippsMulPack_32f_I(const Ipp32f*
pSrc
, Ipp32f*
pSrcDst
, int
len
);
IppStatus ippsMulPack_64f_I(const Ipp64f*
pSrc
, Ipp64f*
pSrcDst
, int
len
);
Include Files
ipps.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
Libraries:
ippcore.lib
,
ippvm.lib
Parameters
pSrc1
,
pSrc2
Pointers to the vectors whose elements are to be multiplied together.
pDst
Pointer to the destination vector which stores the result of the multiplication
pSrc1
[n] *
pSrc2
[n]
.
pSrc
Pointer to the vector whose elements are to be multiplied by the elements of
pSrcDst
in-place.
pSrcDst
Pointer to the source and destination vector (for the in-place operation).
len
Number of elements in the vector.
Description
This function multiplies the elements of the vector
pSrc1
by the elements of the vector
pSrc2
, and stores the result in
pDst
.
The in-place flavors
ippsMulPack
multiply the elements of the vector
pSrc
by the elements of the vector
pSrcDst
, and store the result in
pSrcDst
.
The functions multiply the packed data according to their packed format. The data in Pack packed format include several real values, the rest are complex. Thus, the function performs several real multiplication operations on real elements and complex multiplication operations on complex data. Such kind of packed data multiplication is usually used for signals filtering with the FFT transform when the element-wise multiplication is performed in the frequency domain.
Return Values
ippStsNoErr
Indicates no error
ippStsNullPtrErr
Indicates an error when the
pSrcDst
,
pDst
,
pSrc1
,
pSrc2
, or
pSrc
pointer is
NULL
.
ippStsSizeErr
Indicates an error when
len
is less than or equal to 0.

Example



    
/******************************************************************************* * Copyright 2015-2020 Intel Corporation. * * This software and the related documents are Intel copyrighted materials, and * your use of them is governed by the express license under which they were * provided to you (License). Unless the License provides otherwise, you may not * use, modify, copy, publish, distribute, disclose or transmit this software or * the related documents without Intel's prior written permission. * * This software and the related documents are provided as is, with no express * or implied warranties, other than those that are expressly stated in the * License. *******************************************************************************/ // The code example below illustrates how to use the function ippsMulPack_32f_I. // implemented with Intel(R) Integrated Primitives (Intel(R) IPP) functions: // ippsFFTGetSize_R_32f // ippsFFTInit_R_32f // ippsSet_32f // ippsFFTFwd_RToPack_32f // ippsMulPack_32f_I // ippsFFTInv_PackToR_32f #include <stdio.h> #include "ipp.h" /* Next two defines are created to simplify code reading and understanding */ #define EXIT_MAIN exitLine: /* Label for Exit */ #define check_sts(st) if((st) != ippStsNoErr) goto exitLine; /* Go to Exit if Intel(R) IPP function returned status different from ippStsNoErr */ /* Results of ippMalloc() are not validated because Intel(R) IPP functions perform bad arguments check and will return an appropriate status */ int main(void) { int i = 0; IppStatus status = ippStsNoErr; Ipp32f pFlt[8] = {1.0f/3,1.0f/3,1.0f/3,0,0,0,0,0}; /* Pointers to filter signal */ Ipp32f pSrc[8], pDst[8]; /* Pointers to source/filter/destination signals */ Ipp32f pSrcFr[8], pFltFr[8]; /* Pointers to source/filter/destination signals into the frequency domain */ IppsFFTSpec_R_32f* pSpec = NULL; /* Pointer to FFT pSpec structure */ Ipp8u *pMemInit = NULL, *pBuffer = NULL, *pSpecMem = NULL; /* Pointer to the work buffers */ int sizeSpec = 0, sizeInit = 0, sizeBuf = 0; /* size of FFT pSpec structure, Init and work buffers */ check_sts( status = ippsFFTGetSize_R_32f(3, IPP_FFT_DIV_INV_BY_N, ippAlgHintNone, &sizeSpec, &sizeInit, &sizeBuf) ) /* memory allocation */ pSpecMem = (Ipp8u*) ippMalloc( sizeSpec ); pBuffer = (Ipp8u*) ippMalloc( sizeBuf ); pMemInit = (Ipp8u*) ippMalloc( sizeInit ); check_sts( status = ippsFFTInit_R_32f(&pSpec, 3, IPP_FFT_DIV_INV_BY_N, ippAlgHintNone, pSpecMem, pMemInit) ) ippsSet_32f( 3, pSrc, 8 ); pSrc[3] = 5; /* forward FFT transform : the source signal is transformed into the frequency domain*/ check_sts( status = ippsFFTFwd_RToPack_32f( pSrc, pSrcFr, pSpec, NULL ) ) /* forward FFT transform: the filter signal is transformed into the frequency domain */ check_sts( status = ippsFFTFwd_RToPack_32f( pFlt, pFltFr, pSpec, NULL ) ) /* multiplying the packed data */ check_sts( status = ippsMulPack_32f_I( pFltFr, pSrcFr, 8 ) ) /* inverse FFT transform : the filtered data is transformed to the time domain */ check_sts( status = ippsFFTInv_PackToR_32f( pSrcFr, pDst, pSpec, NULL ) ) printf("filtered ="); for (i = 0; i < 8; ++i) printf(" %f", pDst[i]); printf("\n"); EXIT_MAIN ippFree( pMemInit ); ippFree( pSpec ); ippFree( pBuffer ); printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status)); return status; }

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804