Visible to Intel only — GUID: GUID-B0377287-258A-496B-8B55-9AFEFA4DB3F8
Visible to Intel only — GUID: GUID-B0377287-258A-496B-8B55-9AFEFA4DB3F8
SwapBytes
Reverses the byte order of a vector.
Syntax
IppStatus ippsSwapBytes_16u(const Ipp16u* pSrc, Ipp16u* pDst, int len);
IppStatus ippsSwapBytes_24u(const Ipp8u* pSrc, Ipp8u* pDst, int len);
IppStatus ippsSwapBytes_32u(const Ipp32u* pSrc, Ipp32u* pDst, int len);
IppStatus ippsSwapBytes_64u(const Ipp64u* pSrc, Ipp64u* pDst, int len);
IppStatus ippsSwapBytes_16u_I(Ipp16u* pSrcDst, int len);
IppStatus ippsSwapBytes_24u_I(Ipp8u* pSrcDst, int len);
IppStatus ippsSwapBytes_32u_I(Ipp32u* pSrcDst, int len);
IppStatus ippsSwapBytes_64u_I(Ipp64u* pSrcDst, int len);
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. |
len |
Number of elements in the vector. |
Description
This function reverses the endian order (byte order) of the source vector pSrc (pSrcDst for the in-place operation) and stores the result in pDst (pSrcDst). When the low-order byte is stored in memory at the lowest address, and the high-order byte at the highest address, the little-endian order is implemented.When the high-order byte is stored in memory at the lowest address, and the low-order byte at the highest address, the big-endian order is implemented. The function ippsSwapBytes allows to switch from one order to the other in either direction.
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error when any of the specified pointers is NULL. |
ippStsSizeErr |
Indicates an error when len is less than or equal to zero. |
Example
/*******************************************************************************
* Copyright 2015 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 Performance Primitives (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()
{
Ipp16u vec[2] = { 0x1234, 0x5678 };
IppStatus status;
printf("Source vector %X %X\n", vec[0], vec[1]);
check_sts(status = ippsSwapBytes_16u_I(vec, 2));
printf("After swap \nResult vector %X %X\n", vec[0], vec[1]);
EXIT_MAIN
printf("\nExit status %d (%s)\n", (int)status, ippGetStatusString(status));
return (int)status;
}