+++ /dev/null
-/* ----------------------------------------------------------------------
-* Copyright (C) 2010-2013 ARM Limited. All rights reserved.
-*
-* $Date: 17. January 2013
-* $Revision: V1.4.1
-*
-* Project: CMSIS DSP Library
-* Title: arm_cmplx_mult_real_f32.c
-*
-* Description: Floating-point complex by real multiplication
-*
-* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
-*
-* Redistribution and use in source and binary forms, with or without
-* modification, are permitted provided that the following conditions
-* are met:
-* - Redistributions of source code must retain the above copyright
-* notice, this list of conditions and the following disclaimer.
-* - Redistributions in binary form must reproduce the above copyright
-* notice, this list of conditions and the following disclaimer in
-* the documentation and/or other materials provided with the
-* distribution.
-* - Neither the name of ARM LIMITED nor the names of its contributors
-* may be used to endorse or promote products derived from this
-* software without specific prior written permission.
-*
-* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-* POSSIBILITY OF SUCH DAMAGE.
-* -------------------------------------------------------------------- */
-
-#include "arm_math.h"
-
-/**
- * @ingroup groupCmplxMath
- */
-
-/**
- * @defgroup CmplxByRealMult Complex-by-Real Multiplication
- *
- * Multiplies a complex vector by a real vector and generates a complex result.
- * The data in the complex arrays is stored in an interleaved fashion
- * (real, imag, real, imag, ...).
- * The parameter <code>numSamples</code> represents the number of complex
- * samples processed. The complex arrays have a total of <code>2*numSamples</code>
- * real values while the real array has a total of <code>numSamples</code>
- * real values.
- *
- * The underlying algorithm is used:
- *
- * <pre>
- * for(n=0; n<numSamples; n++) {
- * pCmplxDst[(2*n)+0] = pSrcCmplx[(2*n)+0] * pSrcReal[n];
- * pCmplxDst[(2*n)+1] = pSrcCmplx[(2*n)+1] * pSrcReal[n];
- * }
- * </pre>
- *
- * There are separate functions for floating-point, Q15, and Q31 data types.
- */
-
-/**
- * @addtogroup CmplxByRealMult
- * @{
- */
-
-
-/**
- * @brief Floating-point complex-by-real multiplication
- * @param[in] *pSrcCmplx points to the complex input vector
- * @param[in] *pSrcReal points to the real input vector
- * @param[out] *pCmplxDst points to the complex output vector
- * @param[in] numSamples number of samples in each vector
- * @return none.
- */
-
-void arm_cmplx_mult_real_f32(
- float32_t * pSrcCmplx,
- float32_t * pSrcReal,
- float32_t * pCmplxDst,
- uint32_t numSamples)
-{
- float32_t in; /* Temporary variable to store input value */
- uint32_t blkCnt; /* loop counters */
-
-#ifndef ARM_MATH_CM0_FAMILY
-
- /* Run the below code for Cortex-M4 and Cortex-M3 */
- float32_t inA1, inA2, inA3, inA4; /* Temporary variables to hold input data */
- float32_t inA5, inA6, inA7, inA8; /* Temporary variables to hold input data */
- float32_t inB1, inB2, inB3, inB4; /* Temporary variables to hold input data */
- float32_t out1, out2, out3, out4; /* Temporary variables to hold output data */
- float32_t out5, out6, out7, out8; /* Temporary variables to hold output data */
-
- /* loop Unrolling */
- blkCnt = numSamples >> 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[2 * i] = A[2 * i] * B[i]. */
- /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */
- /* read input from complex input buffer */
- inA1 = pSrcCmplx[0];
- inA2 = pSrcCmplx[1];
- /* read input from real input buffer */
- inB1 = pSrcReal[0];
-
- /* read input from complex input buffer */
- inA3 = pSrcCmplx[2];
-
- /* multiply complex buffer real input with real buffer input */
- out1 = inA1 * inB1;
-
- /* read input from complex input buffer */
- inA4 = pSrcCmplx[3];
-
- /* multiply complex buffer imaginary input with real buffer input */
- out2 = inA2 * inB1;
-
- /* read input from real input buffer */
- inB2 = pSrcReal[1];
- /* read input from complex input buffer */
- inA5 = pSrcCmplx[4];
-
- /* multiply complex buffer real input with real buffer input */
- out3 = inA3 * inB2;
-
- /* read input from complex input buffer */
- inA6 = pSrcCmplx[5];
- /* read input from real input buffer */
- inB3 = pSrcReal[2];
-
- /* multiply complex buffer imaginary input with real buffer input */
- out4 = inA4 * inB2;
-
- /* read input from complex input buffer */
- inA7 = pSrcCmplx[6];
-
- /* multiply complex buffer real input with real buffer input */
- out5 = inA5 * inB3;
-
- /* read input from complex input buffer */
- inA8 = pSrcCmplx[7];
-
- /* multiply complex buffer imaginary input with real buffer input */
- out6 = inA6 * inB3;
-
- /* read input from real input buffer */
- inB4 = pSrcReal[3];
-
- /* store result to destination bufer */
- pCmplxDst[0] = out1;
-
- /* multiply complex buffer real input with real buffer input */
- out7 = inA7 * inB4;
-
- /* store result to destination bufer */
- pCmplxDst[1] = out2;
-
- /* multiply complex buffer imaginary input with real buffer input */
- out8 = inA8 * inB4;
-
- /* store result to destination bufer */
- pCmplxDst[2] = out3;
- pCmplxDst[3] = out4;
- pCmplxDst[4] = out5;
-
- /* incremnet complex input buffer by 8 to process next samples */
- pSrcCmplx += 8u;
-
- /* store result to destination bufer */
- pCmplxDst[5] = out6;
-
- /* increment real input buffer by 4 to process next samples */
- pSrcReal += 4u;
-
- /* store result to destination bufer */
- pCmplxDst[6] = out7;
- pCmplxDst[7] = out8;
-
- /* increment destination buffer by 8 to process next sampels */
- pCmplxDst += 8u;
-
- /* Decrement the numSamples loop counter */
- blkCnt--;
- }
-
- /* If the numSamples is not a multiple of 4, compute any remaining output samples here.
- ** No loop unrolling is used. */
- blkCnt = numSamples % 0x4u;
-
-#else
-
- /* Run the below code for Cortex-M0 */
- blkCnt = numSamples;
-
-#endif /* #ifndef ARM_MATH_CM0_FAMILY */
-
- 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++ = (*pSrcCmplx++) * (in);
- *pCmplxDst++ = (*pSrcCmplx++) * (in);
-
- /* Decrement the numSamples loop counter */
- blkCnt--;
- }
-}
-
-/**
- * @} end of CmplxByRealMult group
- */
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