00001 /* ---------------------------------------------------------------------- 00002 * Copyright (C) 2010 ARM Limited. All rights reserved. 00003 * 00004 * $Date: 15. July 2011 00005 * $Revision: V1.0.10 00006 * 00007 * Project: CMSIS DSP Library 00008 * Title: arm_copy_q31.c 00009 * 00010 * Description: Copies the elements of a Q31 vector. 00011 * 00012 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 00013 * 00014 * Version 1.0.10 2011/7/15 00015 * Big Endian support added and Merged M0 and M3/M4 Source code. 00016 * 00017 * Version 1.0.3 2010/11/29 00018 * Re-organized the CMSIS folders and updated documentation. 00019 * 00020 * Version 1.0.2 2010/11/11 00021 * Documentation updated. 00022 * 00023 * Version 1.0.1 2010/10/05 00024 * Production release and review comments incorporated. 00025 * 00026 * Version 1.0.0 2010/09/20 00027 * Production release and review comments incorporated. 00028 * 00029 * Version 0.0.7 2010/06/10 00030 * Misra-C changes done 00031 * -------------------------------------------------------------------- */ 00032 00033 #include "arm_math.h" 00034 00053 void arm_copy_q31( 00054 q31_t * pSrc, 00055 q31_t * pDst, 00056 uint32_t blockSize) 00057 { 00058 uint32_t blkCnt; /* loop counter */ 00059 00060 00061 #ifndef ARM_MATH_CM0 00062 00063 /* Run the below code for Cortex-M4 and Cortex-M3 */ 00064 00065 /*loop Unrolling */ 00066 blkCnt = blockSize >> 2u; 00067 00068 /* First part of the processing with loop unrolling. Compute 4 outputs at a time. 00069 ** a second loop below computes the remaining 1 to 3 samples. */ 00070 while(blkCnt > 0u) 00071 { 00072 /* C = A */ 00073 /* Copy and then store the values in the destination buffer */ 00074 *pDst++ = *pSrc++; 00075 *pDst++ = *pSrc++; 00076 *pDst++ = *pSrc++; 00077 *pDst++ = *pSrc++; 00078 00079 /* Decrement the loop counter */ 00080 blkCnt--; 00081 } 00082 00083 /* If the blockSize is not a multiple of 4, compute any remaining output samples here. 00084 ** No loop unrolling is used. */ 00085 blkCnt = blockSize % 0x4u; 00086 00087 #else 00088 00089 /* Run the below code for Cortex-M0 */ 00090 00091 /* Loop over blockSize number of values */ 00092 blkCnt = blockSize; 00093 00094 #endif /* #ifndef ARM_MATH_CM0 */ 00095 00096 while(blkCnt > 0u) 00097 { 00098 /* C = A */ 00099 /* Copy and then store the value in the destination buffer */ 00100 *pDst++ = *pSrc++; 00101 00102 /* Decrement the loop counter */ 00103 blkCnt--; 00104 } 00105 } 00106