diff options
Diffstat (limited to 'DSP/Source/SupportFunctions/arm_copy_q31.c')
| -rw-r--r-- | DSP/Source/SupportFunctions/arm_copy_q31.c | 77 |
1 files changed, 32 insertions, 45 deletions
diff --git a/DSP/Source/SupportFunctions/arm_copy_q31.c b/DSP/Source/SupportFunctions/arm_copy_q31.c index 5bf8934..e342a32 100644 --- a/DSP/Source/SupportFunctions/arm_copy_q31.c +++ b/DSP/Source/SupportFunctions/arm_copy_q31.c @@ -3,13 +3,13 @@ * Title: arm_copy_q31.c * Description: Copies the elements of a Q31 vector * - * $Date: 27. January 2017 - * $Revision: V.1.5.1 + * $Date: 18. March 2019 + * $Revision: V1.6.0 * * Target Processor: Cortex-M cores * -------------------------------------------------------------------- */ /* - * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved. + * Copyright (C) 2010-2019 ARM Limited or its affiliates. All rights reserved. * * SPDX-License-Identifier: Apache-2.0 * @@ -29,83 +29,70 @@ #include "arm_math.h" /** - * @ingroup groupSupport + @ingroup groupSupport */ /** - * @addtogroup copy - * @{ + @addtogroup copy + @{ */ /** - * @brief Copies the elements of a Q31 vector. - * @param[in] *pSrc points to input vector - * @param[out] *pDst points to output vector - * @param[in] blockSize length of the input vector - * @return none. - * + @brief Copies the elements of a Q31 vector. + @param[in] pSrc points to input vector + @param[out] pDst points to output vector + @param[in] blockSize number of samples in each vector + @return none */ void arm_copy_q31( - q31_t * pSrc, - q31_t * pDst, - uint32_t blockSize) + const q31_t * pSrc, + q31_t * pDst, + uint32_t blockSize) { - uint32_t blkCnt; /* loop counter */ - - -#if defined (ARM_MATH_DSP) + uint32_t blkCnt; /* Loop counter */ - /* Run the below code for Cortex-M4 and Cortex-M3 */ - q31_t in1, in2, in3, in4; +#if defined (ARM_MATH_LOOPUNROLL) - /*loop Unrolling */ + /* Loop unrolling: Compute 4 outputs at a time */ blkCnt = blockSize >> 2U; - /* First part of the processing with loop unrolling. Compute 4 outputs at a time. - ** a second loop below computes the remaining 1 to 3 samples. */ while (blkCnt > 0U) { /* C = A */ - /* Copy and then store the values in the destination buffer */ - in1 = *pSrc++; - in2 = *pSrc++; - in3 = *pSrc++; - in4 = *pSrc++; - - *pDst++ = in1; - *pDst++ = in2; - *pDst++ = in3; - *pDst++ = in4; - - /* Decrement the loop counter */ + + /* Copy and store result in destination buffer */ + *pDst++ = *pSrc++; + *pDst++ = *pSrc++; + *pDst++ = *pSrc++; + *pDst++ = *pSrc++; + + /* Decrement loop counter */ blkCnt--; } - /* If the blockSize is not a multiple of 4, compute any remaining output samples here. - ** No loop unrolling is used. */ + /* Loop unrolling: Compute remaining outputs */ blkCnt = blockSize % 0x4U; #else - /* Run the below code for Cortex-M0 */ - - /* Loop over blockSize number of values */ + /* Initialize blkCnt with number of samples */ blkCnt = blockSize; -#endif /* #if defined (ARM_MATH_DSP) */ +#endif /* #if defined (ARM_MATH_LOOPUNROLL) */ while (blkCnt > 0U) { /* C = A */ - /* Copy and then store the value in the destination buffer */ + + /* Copy and store result in destination buffer */ *pDst++ = *pSrc++; - /* Decrement the loop counter */ + /* Decrement loop counter */ blkCnt--; } } /** - * @} end of BasicCopy group + @} end of BasicCopy group */ |