diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/ComplexMathFunctions/arm_cmplx_mult_real_f32.c')
| -rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/ComplexMathFunctions/arm_cmplx_mult_real_f32.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/ComplexMathFunctions/arm_cmplx_mult_real_f32.c b/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/ComplexMathFunctions/arm_cmplx_mult_real_f32.c new file mode 100644 index 0000000000..10d3f512c0 --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/ComplexMathFunctions/arm_cmplx_mult_real_f32.c @@ -0,0 +1,225 @@ +/* ---------------------------------------------------------------------- +* 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 + */ |