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_mult_real_q15.c | 182 +++++++++++++++++++++ 1 file changed, 182 insertions(+) create mode 100644 Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q15.c (limited to 'Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q15.c') diff --git a/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q15.c b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q15.c new file mode 100644 index 0000000..b6d3cb8 --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q15.c @@ -0,0 +1,182 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_cmplx_mult_real_q15.c + * Description: Q15 complex by real multiplication + * + * $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 CmplxByRealMult + @{ + */ + +/** + @brief Q15 complex-by-real multiplication. + @param[in] pSrcCmplx points to complex input vector + @param[in] pSrcReal points to real input vector + @param[out] pCmplxDst points to complex output vector + @param[in] numSamples number of samples in each vector + @return none + + @par Scaling and Overflow Behavior + The function uses saturating arithmetic. + Results outside of the allowable Q15 range [0x8000 0x7FFF] are saturated. + */ + +void arm_cmplx_mult_real_q15( + const q15_t * pSrcCmplx, + const q15_t * pSrcReal, + q15_t * pCmplxDst, + uint32_t numSamples) +{ + uint32_t blkCnt; /* Loop counter */ + q15_t in; /* Temporary variable */ + +#if defined (ARM_MATH_LOOPUNROLL) + +#if defined (ARM_MATH_DSP) + q31_t inA1, inA2; /* Temporary variables to hold input data */ + q31_t inB1; /* Temporary variables to hold input data */ + q15_t out1, out2, out3, out4; /* Temporary variables to hold output data */ + q31_t mul1, mul2, mul3, mul4; /* Temporary variables to hold intermediate data */ +#endif + + /* Loop unrolling: Compute 4 outputs at a time */ + blkCnt = numSamples >> 2U; + + while (blkCnt > 0U) + { + /* C[2 * i ] = A[2 * i ] * B[i]. */ + /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */ + +#if defined (ARM_MATH_DSP) + /* read 2 complex numbers both real and imaginary from complex input buffer */ + inA1 = read_q15x2_ia ((q15_t **) &pSrcCmplx); + inA2 = read_q15x2_ia ((q15_t **) &pSrcCmplx); + /* read 2 real values at a time from real input buffer */ + inB1 = read_q15x2_ia ((q15_t **) &pSrcReal); + + /* multiply complex number with real numbers */ +#ifndef ARM_MATH_BIG_ENDIAN + mul1 = (q31_t) ((q15_t) (inA1) * (q15_t) (inB1)); + mul2 = (q31_t) ((q15_t) (inA1 >> 16) * (q15_t) (inB1)); + mul3 = (q31_t) ((q15_t) (inA2) * (q15_t) (inB1 >> 16)); + mul4 = (q31_t) ((q15_t) (inA2 >> 16) * (q15_t) (inB1 >> 16)); +#else + mul2 = (q31_t) ((q15_t) (inA1 >> 16) * (q15_t) (inB1 >> 16)); + mul1 = (q31_t) ((q15_t) inA1 * (q15_t) (inB1 >> 16)); + mul4 = (q31_t) ((q15_t) (inA2 >> 16) * (q15_t) inB1); + mul3 = (q31_t) ((q15_t) inA2 * (q15_t) inB1); +#endif /* #ifndef ARM_MATH_BIG_ENDIAN */ + + /* saturate the result */ + out1 = (q15_t) __SSAT(mul1 >> 15U, 16); + out2 = (q15_t) __SSAT(mul2 >> 15U, 16); + out3 = (q15_t) __SSAT(mul3 >> 15U, 16); + out4 = (q15_t) __SSAT(mul4 >> 15U, 16); + + /* pack real and imaginary outputs and store them to destination */ + write_q15x2_ia (&pCmplxDst, __PKHBT(out1, out2, 16)); + write_q15x2_ia (&pCmplxDst, __PKHBT(out3, out4, 16)); + + inA1 = read_q15x2_ia ((q15_t **) &pSrcCmplx); + inA2 = read_q15x2_ia ((q15_t **) &pSrcCmplx); + inB1 = read_q15x2_ia ((q15_t **) &pSrcReal); + +#ifndef ARM_MATH_BIG_ENDIAN + mul1 = (q31_t) ((q15_t) (inA1) * (q15_t) (inB1)); + mul2 = (q31_t) ((q15_t) (inA1 >> 16) * (q15_t) (inB1)); + mul3 = (q31_t) ((q15_t) (inA2) * (q15_t) (inB1 >> 16)); + mul4 = (q31_t) ((q15_t) (inA2 >> 16) * (q15_t) (inB1 >> 16)); +#else + mul2 = (q31_t) ((q15_t) (inA1 >> 16) * (q15_t) (inB1 >> 16)); + mul1 = (q31_t) ((q15_t) inA1 * (q15_t) (inB1 >> 16)); + mul4 = (q31_t) ((q15_t) (inA2 >> 16) * (q15_t) inB1); + mul3 = (q31_t) ((q15_t) inA2 * (q15_t) inB1); +#endif /* #ifndef ARM_MATH_BIG_ENDIAN */ + + out1 = (q15_t) __SSAT(mul1 >> 15U, 16); + out2 = (q15_t) __SSAT(mul2 >> 15U, 16); + out3 = (q15_t) __SSAT(mul3 >> 15U, 16); + out4 = (q15_t) __SSAT(mul4 >> 15U, 16); + + write_q15x2_ia (&pCmplxDst, __PKHBT(out1, out2, 16)); + write_q15x2_ia (&pCmplxDst, __PKHBT(out3, out4, 16)); +#else + in = *pSrcReal++; + *pCmplxDst++ = (q15_t) __SSAT((((q31_t) *pSrcCmplx++ * in) >> 15), 16); + *pCmplxDst++ = (q15_t) __SSAT((((q31_t) *pSrcCmplx++ * in) >> 15), 16); + + in = *pSrcReal++; + *pCmplxDst++ = (q15_t) __SSAT((((q31_t) *pSrcCmplx++ * in) >> 15), 16); + *pCmplxDst++ = (q15_t) __SSAT((((q31_t) *pSrcCmplx++ * in) >> 15), 16); + + in = *pSrcReal++; + *pCmplxDst++ = (q15_t) __SSAT((((q31_t) *pSrcCmplx++ * in) >> 15), 16); + *pCmplxDst++ = (q15_t) __SSAT((((q31_t) *pSrcCmplx++ * in) >> 15), 16); + + in = *pSrcReal++; + *pCmplxDst++ = (q15_t) __SSAT((((q31_t) *pSrcCmplx++ * in) >> 15), 16); + *pCmplxDst++ = (q15_t) __SSAT((((q31_t) *pSrcCmplx++ * in) >> 15), 16); +#endif + + /* 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) + { + /* C[2 * i ] = A[2 * i ] * B[i]. */ + /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */ + + in = *pSrcReal++; + /* store the result in the destination buffer. */ + *pCmplxDst++ = (q15_t) __SSAT((((q31_t) *pSrcCmplx++ * in) >> 15), 16); + *pCmplxDst++ = (q15_t) __SSAT((((q31_t) *pSrcCmplx++ * in) >> 15), 16); + + /* Decrement loop counter */ + blkCnt--; + } + +} + +/** + @} end of CmplxByRealMult group + */ -- cgit v1.2.3