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Diffstat (limited to 'DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mag_q31.c')
| -rw-r--r-- | DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mag_q31.c | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mag_q31.c b/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mag_q31.c deleted file mode 100644 index 1091673..0000000 --- a/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mag_q31.c +++ /dev/null @@ -1,185 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 19. March 2015 -* $Revision: V.1.4.5 -* -* Project: CMSIS DSP Library -* Title: arm_cmplx_mag_q31.c -* -* Description: Q31 complex magnitude -* -* 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 - */ - -/** - * @addtogroup cmplx_mag - * @{ - */ - -/** - * @brief Q31 complex magnitude - * @param *pSrc points to the complex input vector - * @param *pDst points to the real output vector - * @param numSamples number of complex samples in the input vector - * @return none. - * - * <b>Scaling and Overflow Behavior:</b> - * \par - * The function implements 1.31 by 1.31 multiplications and finally output is converted into 2.30 format. - * Input down scaling is not required. - */ - -void arm_cmplx_mag_q31( - q31_t * pSrc, - q31_t * pDst, - uint32_t numSamples) -{ - q31_t real, imag; /* Temporary variables to hold input values */ - q31_t acc0, acc1; /* Accumulators */ - uint32_t blkCnt; /* loop counter */ - -#ifndef ARM_MATH_CM0_FAMILY - - /* Run the below code for Cortex-M4 and Cortex-M3 */ - q31_t real1, real2, imag1, imag2; /* Temporary variables to hold input values */ - q31_t out1, out2, out3, out4; /* Accumulators */ - q63_t mul1, mul2, mul3, mul4; /* Temporary variables */ - - - /*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) - { - /* read complex input from source buffer */ - real1 = pSrc[0]; - imag1 = pSrc[1]; - real2 = pSrc[2]; - imag2 = pSrc[3]; - - /* calculate power of input values */ - mul1 = (q63_t) real1 *real1; - mul2 = (q63_t) imag1 *imag1; - mul3 = (q63_t) real2 *real2; - mul4 = (q63_t) imag2 *imag2; - - /* get the result to 3.29 format */ - out1 = (q31_t) (mul1 >> 33); - out2 = (q31_t) (mul2 >> 33); - out3 = (q31_t) (mul3 >> 33); - out4 = (q31_t) (mul4 >> 33); - - /* add real and imaginary accumulators */ - out1 = out1 + out2; - out3 = out3 + out4; - - /* read complex input from source buffer */ - real1 = pSrc[4]; - imag1 = pSrc[5]; - real2 = pSrc[6]; - imag2 = pSrc[7]; - - /* calculate square root */ - arm_sqrt_q31(out1, &pDst[0]); - - /* calculate power of input values */ - mul1 = (q63_t) real1 *real1; - - /* calculate square root */ - arm_sqrt_q31(out3, &pDst[1]); - - /* calculate power of input values */ - mul2 = (q63_t) imag1 *imag1; - mul3 = (q63_t) real2 *real2; - mul4 = (q63_t) imag2 *imag2; - - /* get the result to 3.29 format */ - out1 = (q31_t) (mul1 >> 33); - out2 = (q31_t) (mul2 >> 33); - out3 = (q31_t) (mul3 >> 33); - out4 = (q31_t) (mul4 >> 33); - - /* add real and imaginary accumulators */ - out1 = out1 + out2; - out3 = out3 + out4; - - /* calculate square root */ - arm_sqrt_q31(out1, &pDst[2]); - - /* increment destination by 8 to process next samples */ - pSrc += 8u; - - /* calculate square root */ - arm_sqrt_q31(out3, &pDst[3]); - - /* increment destination by 4 to process next samples */ - pDst += 4u; - - /* Decrement the 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[0] = sqrt(A[0] * A[0] + A[1] * A[1]) */ - real = *pSrc++; - imag = *pSrc++; - acc0 = (q31_t) (((q63_t) real * real) >> 33); - acc1 = (q31_t) (((q63_t) imag * imag) >> 33); - /* store the result in 2.30 format in the destination buffer. */ - arm_sqrt_q31(acc0 + acc1, pDst++); - - /* Decrement the loop counter */ - blkCnt--; - } -} - -/** - * @} end of cmplx_mag group - */ |