Developer Reference

  • 2020
  • 07/15/2020
  • Public Content
Contents

ConjPack

Converts the data in
Pack
format to complex data format.

Syntax

IppStatus ippsConjPack_32fc(const Ipp32f*
pSrc
, Ipp32fc*
pDst
, int
lenDst
);
IppStatus ippsConjPack_64fc(const Ipp64f*
pSrc
, Ipp64fc*
pDst
, int
lenDst
);
IppStatus ippsConjPack_32fc_I(Ipp32fc*
pSrcDst
, int
lenDst
);
IppStatus ippsConjPack_64fc_I(Ipp64fc*
pSrcDst
, int
lenDst
);
Include Files
ipps.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
Libraries:
ippcore.lib
,
ippvm.lib
Parameters
pSrc
Pointer to the source vector.
pDst
Pointer to the destination vector.
pSrcDst
Pointer to the source and destination vector (for the in-place operation).
lenDst
Number of elements in the vector.
Description
This function converts the data in
Pack
format in the vector
pSrc
to complex data format and stores the results in
pDst
.
The in-place function
ippsConjPack
converts the data in
Pack
format in the vector
pSrcDst
to complex data format and stores the results in
pSrcDst
.
The table below shows the examples of unpack from the
Pack
format. The
Data
column contains the real input data to be converted by the forward FFT transform to the packed data. The packed real data are in the
Packed
column. The output result is the complex data vector in the
Extended
column. The number of vector elements is in the
Length
column.
Examples of Unpack from the Pack Format
Data
Packed
Extended
Length
FFT([1])
1
{1, 0}
1
FFT([1 2])
3, -1
{3, 0}, {-1, 0}
2
FFT([1 2 3])
6, -1.5, 0.86
{6, 0}, {-1.5, 0.86}, {-1.5, -0.86}
3
FFT([1 2 3 9])
15, -2, 7, -7
{15, 0}, {-2, 7}, {-7, 0}, {-2, -7}
4
Return Values
ippStsNoErr
Indicates no error.
ippStsNullPtrErr
Indicates an error when the
pSrcDst
,
pDst
, or
pSrc
pointer is
NULL
.
ippStsSizeErr
Indicates an error when
lenDst
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. *******************************************************************************/ #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) Integrated Primitives (Intel(R) IPP) function returned status different from ippStsNoErr */ int main(void) { IppStatus status; Ipp32f x[8] = {1,2,3,5,6,7,8,9}; Ipp32fc zero={0,0}, y[6] = {0}; int i = 0; check_sts( status = ippsSet_32fc( zero, y, 6 ) ) check_sts( status = ippsConjPack_32fc( x, y, 6 ) ) for (i = 0; i < 6; i++) { printf("{%.3f %.3f} ",y[i].re,y[i].im); } printf("\n"); check_sts( status = ippsSet_32fc( zero, y, 6 ) ) check_sts( status = ippsConjPack_32fc( x, y, 5 ) ) for (i = 0; i < 5; i++) { printf("{%.3f %.3f} ",y[i].re,y[i].im); } printf("\n"); EXIT_MAIN printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status)); return (int)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