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Diffstat (limited to 'Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_mag_q31.c')
| -rwxr-xr-x | Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_mag_q31.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_mag_q31.c b/Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_mag_q31.c new file mode 100755 index 0000000..db28961 --- /dev/null +++ b/Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_mag_q31.c @@ -0,0 +1,203 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_cmplx_mag_q31.c + * Description: Q31 complex magnitude + * + * $Date: 23 April 2021 + * $Revision: V1.9.0 + * + * Target Processor: Cortex-M and Cortex-A cores + * -------------------------------------------------------------------- */ + +/* + * Copyright (C) 2010-2021 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_compiler_specific.h" + + +#include "dsp/complex_math_functions.h" + +/** + @ingroup groupCmplxMath + */ + +/** + @addtogroup cmplx_mag + @{ + */ + +/** + @brief Q31 complex magnitude. + @param[in] pSrc points to input vector + @param[out] pDst points to output vector + @param[in] numSamples number of samples in each vector + + @par Scaling and Overflow Behavior + The function implements 1.31 by 1.31 multiplications and finally output is converted into 2.30 format. + Input down scaling is not required. + */ + +#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE) + +#include "arm_helium_utils.h" + +ARM_DSP_ATTRIBUTE void arm_cmplx_mag_q31( + const q31_t * pSrc, + q31_t * pDst, + uint32_t numSamples) +{ + int32_t blockSize = numSamples; /* loop counters */ + uint32_t blkCnt; /* loop counters */ + + q31x4x2_t vecSrc; + q31x4_t sum; + + q31_t real, imag; /* Temporary input variables */ + q31_t acc0, acc1; /* Accumulators */ + + /* Compute 4 complex samples at a time */ + blkCnt = blockSize >> 2; + while (blkCnt > 0U) + { + vecSrc = vld2q(pSrc); + + sum = vqaddq(vmulhq(vecSrc.val[0], vecSrc.val[0]), + vmulhq(vecSrc.val[1], vecSrc.val[1])); + + sum = vshrq(sum, 1); + + /* + + This function is using a table. There are compilations flags to avoid + including this table (and in this case, arm_cmplx_maq_q31 must not + be built and linked.) + + */ + sum = FAST_VSQRT_Q31(sum); + + vst1q(pDst, sum); + + /* + * Decrement the blockSize loop counter + */ + blkCnt--; + pSrc += 8; + pDst += 4; + } + + /* + * tail + */ + blkCnt = blockSize & 3; + 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 result in 2.30 format in destination buffer. */ + arm_sqrt_q31(acc0 + acc1, pDst++); + + /* Decrement loop counter */ + blkCnt--; + } +} + +#else +ARM_DSP_ATTRIBUTE void arm_cmplx_mag_q31( + const q31_t * pSrc, + q31_t * pDst, + uint32_t numSamples) +{ + uint32_t blkCnt; /* Loop counter */ + q31_t real, imag; /* Temporary input variables */ + q31_t acc0, acc1; /* Accumulators */ + +#if defined (ARM_MATH_LOOPUNROLL) + + /* Loop unrolling: Compute 4 outputs at a time */ + blkCnt = numSamples >> 2U; + + 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 result in 2.30 format in destination buffer. */ + arm_sqrt_q31(acc0 + acc1, pDst++); + + real = *pSrc++; + imag = *pSrc++; + acc0 = (q31_t) (((q63_t) real * real) >> 33); + acc1 = (q31_t) (((q63_t) imag * imag) >> 33); + arm_sqrt_q31(acc0 + acc1, pDst++); + + real = *pSrc++; + imag = *pSrc++; + acc0 = (q31_t) (((q63_t) real * real) >> 33); + acc1 = (q31_t) (((q63_t) imag * imag) >> 33); + arm_sqrt_q31(acc0 + acc1, pDst++); + + real = *pSrc++; + imag = *pSrc++; + acc0 = (q31_t) (((q63_t) real * real) >> 33); + acc1 = (q31_t) (((q63_t) imag * imag) >> 33); + arm_sqrt_q31(acc0 + acc1, pDst++); + + /* 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[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 result in 2.30 format in destination buffer. */ + arm_sqrt_q31(acc0 + acc1, pDst++); + + /* Decrement loop counter */ + blkCnt--; + } + +} +#endif /* defined(ARM_MATH_MVEI) */ + +/** + @} end of cmplx_mag group + */ |