From 86608c6770cf08c138a2bdab5855072f64be09ef Mon Sep 17 00:00:00 2001 From: joshua Date: Sat, 30 Dec 2023 23:54:31 -0500 Subject: initial commit --- .../ComplexMathFunctions/arm_cmplx_dot_prod_q15.c | 154 +++++++++++++++++++++ 1 file changed, 154 insertions(+) create mode 100644 Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c (limited to 'Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c') diff --git a/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c new file mode 100644 index 0000000..5947958 --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c @@ -0,0 +1,154 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_cmplx_dot_prod_q15.c + * Description: Processing function for the Q15 Complex Dot product + * + * $Date: 18. March 2019 + * $Revision: V1.6.0 + * + * Target Processor: Cortex-M cores + * -------------------------------------------------------------------- */ +/* + * Copyright (C) 2010-2019 ARM Limited or its affiliates. All rights reserved. + * + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the License); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an AS IS BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "arm_math.h" + +/** + @ingroup groupCmplxMath + */ + +/** + @addtogroup cmplx_dot_prod + @{ + */ + +/** + @brief Q15 complex dot product. + @param[in] pSrcA points to the first input vector + @param[in] pSrcB points to the second input vector + @param[in] numSamples number of samples in each vector + @param[out] realResult real part of the result returned here + @param[out] imagResult imaginary part of the result returned her + @return none + + @par Scaling and Overflow Behavior + The function is implemented using an internal 64-bit accumulator. + The intermediate 1.15 by 1.15 multiplications are performed with full precision and yield a 2.30 result. + These are accumulated in a 64-bit accumulator with 34.30 precision. + As a final step, the accumulators are converted to 8.24 format. + The return results realResult and imagResult are in 8.24 format. + */ + +void arm_cmplx_dot_prod_q15( + const q15_t * pSrcA, + const q15_t * pSrcB, + uint32_t numSamples, + q31_t * realResult, + q31_t * imagResult) +{ + uint32_t blkCnt; /* Loop counter */ + q63_t real_sum = 0, imag_sum = 0; /* Temporary result variables */ + q15_t a0,b0,c0,d0; + +#if defined (ARM_MATH_LOOPUNROLL) + + /* Loop unrolling: Compute 4 outputs at a time */ + blkCnt = numSamples >> 2U; + + while (blkCnt > 0U) + { + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += (q31_t)a0 * c0; + imag_sum += (q31_t)a0 * d0; + real_sum -= (q31_t)b0 * d0; + imag_sum += (q31_t)b0 * c0; + + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += (q31_t)a0 * c0; + imag_sum += (q31_t)a0 * d0; + real_sum -= (q31_t)b0 * d0; + imag_sum += (q31_t)b0 * c0; + + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += (q31_t)a0 * c0; + imag_sum += (q31_t)a0 * d0; + real_sum -= (q31_t)b0 * d0; + imag_sum += (q31_t)b0 * c0; + + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += (q31_t)a0 * c0; + imag_sum += (q31_t)a0 * d0; + real_sum -= (q31_t)b0 * d0; + imag_sum += (q31_t)b0 * c0; + + /* Decrement loop counter */ + blkCnt--; + } + + /* Loop unrolling: Compute remaining outputs */ + blkCnt = numSamples % 0x4U; + +#else + + /* Initialize blkCnt with number of samples */ + blkCnt = numSamples; + +#endif /* #if defined (ARM_MATH_LOOPUNROLL) */ + + while (blkCnt > 0U) + { + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += (q31_t)a0 * c0; + imag_sum += (q31_t)a0 * d0; + real_sum -= (q31_t)b0 * d0; + imag_sum += (q31_t)b0 * c0; + + /* Decrement loop counter */ + blkCnt--; + } + + /* Store real and imaginary result in 8.24 format */ + /* Convert real data in 34.30 to 8.24 by 6 right shifts */ + *realResult = (q31_t) (real_sum >> 6); + /* Convert imaginary data in 34.30 to 8.24 by 6 right shifts */ + *imagResult = (q31_t) (imag_sum >> 6); +} + +/** + @} end of cmplx_dot_prod group + */ -- cgit v1.2.3