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_q15.c 00009 * 00010 * Description: Copies the elements of a Q15 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 00052 void arm_copy_q15( 00053 q15_t * pSrc, 00054 q15_t * pDst, 00055 uint32_t blockSize) 00056 { 00057 uint32_t blkCnt; /* loop counter */ 00058 00059 #ifndef ARM_MATH_CM0 00060 00061 /* Run the below code for Cortex-M4 and Cortex-M3 */ 00062 00063 q15_t in1, in2; /* Temporary variables */ 00064 00065 00066 /*loop Unrolling */ 00067 blkCnt = blockSize >> 2u; 00068 00069 /* First part of the processing with loop unrolling. Compute 4 outputs at a time. 00070 ** a second loop below computes the remaining 1 to 3 samples. */ 00071 while(blkCnt > 0u) 00072 { 00073 /* C = A */ 00074 /* Read two inputs */ 00075 in1 = *pSrc++; 00076 in2 = *pSrc++; 00077 00078 #ifndef ARM_MATH_BIG_ENDIAN 00079 00080 /* Store the values in the destination buffer by packing the two inputs */ 00081 *__SIMD32(pDst)++ = __PKHBT(in1, in2, 16); 00082 00083 in1 = *pSrc++; 00084 in2 = *pSrc++; 00085 *__SIMD32(pDst)++ = __PKHBT(in1, in2, 16); 00086 00087 #else 00088 00089 /* Store the values in the destination buffer by packing the two inputs */ 00090 *__SIMD32(pDst)++ = __PKHBT(in2, in1, 16); 00091 00092 in1 = *pSrc++; 00093 in2 = *pSrc++; 00094 *__SIMD32(pDst)++ = __PKHBT(in2, in1, 16); 00095 00096 00097 #endif /* #ifndef ARM_MATH_BIG_ENDIAN */ 00098 00099 /* Decrement the loop counter */ 00100 blkCnt--; 00101 } 00102 00103 /* If the blockSize is not a multiple of 4, compute any remaining output samples here. 00104 ** No loop unrolling is used. */ 00105 blkCnt = blockSize % 0x4u; 00106 00107 00108 #else 00109 00110 /* Run the below code for Cortex-M0 */ 00111 00112 /* Loop over blockSize number of values */ 00113 blkCnt = blockSize; 00114 00115 #endif /* #ifndef ARM_MATH_CM0 */ 00116 00117 while(blkCnt > 0u) 00118 { 00119 /* C = A */ 00120 /* Copy and then store the value in the destination buffer */ 00121 *pDst++ = *pSrc++; 00122 00123 /* Decrement the loop counter */ 00124 blkCnt--; 00125 } 00126 } 00127