diff options
Diffstat (limited to 'Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_offset_q31.c')
| -rw-r--r-- | Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_offset_q31.c | 118 |
1 files changed, 59 insertions, 59 deletions
diff --git a/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_offset_q31.c b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_offset_q31.c index 655426e52..5de36b4b4 100644 --- a/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_offset_q31.c +++ b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_offset_q31.c @@ -3,13 +3,13 @@ * Title: arm_offset_q31.c * Description: Q31 vector offset * - * $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 * @@ -29,100 +29,100 @@ #include "arm_math.h" /** - * @ingroup groupMath + @ingroup groupMath */ /** - * @addtogroup offset - * @{ + @addtogroup BasicOffset + @{ */ /** - * @brief Adds a constant offset to a Q31 vector. - * @param[in] *pSrc points to the input vector - * @param[in] offset is the offset to be added - * @param[out] *pDst points to the output vector - * @param[in] blockSize number of samples in the vector - * @return none. - * - * <b>Scaling and Overflow Behavior:</b> - * \par - * The function uses saturating arithmetic. - * Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] are saturated. + @brief Adds a constant offset to a Q31 vector. + @param[in] pSrc points to the input vector + @param[in] offset is the offset to be added + @param[out] pDst points to the output vector + @param[in] blockSize number of samples in each vector + @return none + + @par Scaling and Overflow Behavior + The function uses saturating arithmetic. + Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] are saturated. */ void arm_offset_q31( - q31_t * pSrc, - q31_t offset, - q31_t * pDst, - uint32_t blockSize) + const q31_t * pSrc, + q31_t offset, + 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 + offset */ - /* Add offset and then store the results in the destination buffer. */ - in1 = *pSrc++; - in2 = *pSrc++; - in3 = *pSrc++; - in4 = *pSrc++; - - *pDst++ = __QADD(in1, offset); - *pDst++ = __QADD(in2, offset); - *pDst++ = __QADD(in3, offset); - *pDst++ = __QADD(in4, offset); - - /* Decrement the loop counter */ - blkCnt--; - } - /* If the blockSize is not a multiple of 4, compute any remaining output samples here. - ** No loop unrolling is used. */ - blkCnt = blockSize % 0x4U; + /* Add offset and store result in destination buffer. */ +#if defined (ARM_MATH_DSP) + *pDst++ = __QADD(*pSrc++, offset); +#else + *pDst++ = (q31_t) clip_q63_to_q31((q63_t) * pSrc++ + offset); +#endif - while (blkCnt > 0U) - { - /* C = A + offset */ - /* Add offset and then store the result in the destination buffer. */ +#if defined (ARM_MATH_DSP) + *pDst++ = __QADD(*pSrc++, offset); +#else + *pDst++ = (q31_t) clip_q63_to_q31((q63_t) * pSrc++ + offset); +#endif + +#if defined (ARM_MATH_DSP) *pDst++ = __QADD(*pSrc++, offset); +#else + *pDst++ = (q31_t) clip_q63_to_q31((q63_t) * pSrc++ + offset); +#endif + +#if defined (ARM_MATH_DSP) + *pDst++ = __QADD(*pSrc++, offset); +#else + *pDst++ = (q31_t) clip_q63_to_q31((q63_t) * pSrc++ + offset); +#endif - /* Decrement the loop counter */ + /* Decrement loop counter */ blkCnt--; } -#else + /* Loop unrolling: Compute remaining outputs */ + blkCnt = blockSize % 0x4U; - /* Run the below code for Cortex-M0 */ +#else /* Initialize blkCnt with number of samples */ blkCnt = blockSize; +#endif /* #if defined (ARM_MATH_LOOPUNROLL) */ + while (blkCnt > 0U) { /* C = A + offset */ - /* Add offset and then store the result in the destination buffer. */ + + /* Add offset and store result in destination buffer. */ +#if defined (ARM_MATH_DSP) + *pDst++ = __QADD(*pSrc++, offset); +#else *pDst++ = (q31_t) clip_q63_to_q31((q63_t) * pSrc++ + offset); +#endif - /* Decrement the loop counter */ + /* Decrement loop counter */ blkCnt--; } -#endif /* #if defined (ARM_MATH_DSP) */ - } /** - * @} end of offset group + @} end of BasicOffset group */ |