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_dot_prod_f32.c | 233 +++++++++++++++++++++ 1 file changed, 233 insertions(+) create mode 100644 Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_f32.c (limited to 'Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_f32.c') diff --git a/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_f32.c b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_f32.c new file mode 100644 index 0000000..167b865 --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_f32.c @@ -0,0 +1,233 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_cmplx_dot_prod_f32.c + * Description: Floating-point complex dot product + * + * $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 + */ + +/** + @defgroup cmplx_dot_prod Complex Dot Product + + Computes the dot product of two complex vectors. + The vectors are multiplied element-by-element and then summed. + + The pSrcA points to the first complex input vector and + pSrcB points to the second complex input vector. + numSamples specifies the number of complex samples + and the data in each array is stored in an interleaved fashion + (real, imag, real, imag, ...). + Each array has a total of 2*numSamples values. + + The underlying algorithm is used: + + 
+  realResult = 0;
+  imagResult = 0;
+  for (n = 0; n < numSamples; n++) {
+      realResult += pSrcA[(2*n)+0] * pSrcB[(2*n)+0] - pSrcA[(2*n)+1] * pSrcB[(2*n)+1];
+      imagResult += pSrcA[(2*n)+0] * pSrcB[(2*n)+1] + pSrcA[(2*n)+1] * pSrcB[(2*n)+0];
+  }
+
+ + There are separate functions for floating-point, Q15, and Q31 data types. + */ + +/** + @addtogroup cmplx_dot_prod + @{ + */ + +/** + @brief Floating-point complex dot product. + @param[in] pSrcA points to the first input vector + @param[in] pSrcB points to the second input vector + @param[in] numSamples number of samples in each vector + @param[out] realResult real part of the result returned here + @param[out] imagResult imaginary part of the result returned here + @return none + */ + +void arm_cmplx_dot_prod_f32( + const float32_t * pSrcA, + const float32_t * pSrcB, + uint32_t numSamples, + float32_t * realResult, + float32_t * imagResult) +{ + uint32_t blkCnt; /* Loop counter */ + float32_t real_sum = 0.0f, imag_sum = 0.0f; /* Temporary result variables */ + float32_t a0,b0,c0,d0; + +#if defined(ARM_MATH_NEON) + float32x4x2_t vec1,vec2,vec3,vec4; + float32x4_t accR,accI; + float32x2_t accum = vdup_n_f32(0); + + accR = vdupq_n_f32(0.0); + accI = vdupq_n_f32(0.0); + + /* Loop unrolling: Compute 8 outputs at a time */ + blkCnt = numSamples >> 3U; + + while (blkCnt > 0U) + { + /* C = (A[0]+jA[1])*(B[0]+jB[1]) + ... */ + /* Calculate dot product and then store the result in a temporary buffer. */ + + vec1 = vld2q_f32(pSrcA); + vec2 = vld2q_f32(pSrcB); + + /* Increment pointers */ + pSrcA += 8; + pSrcB += 8; + + /* Re{C} = Re{A}*Re{B} - Im{A}*Im{B} */ + accR = vmlaq_f32(accR,vec1.val[0],vec2.val[0]); + accR = vmlsq_f32(accR,vec1.val[1],vec2.val[1]); + + /* Im{C} = Re{A}*Im{B} + Im{A}*Re{B} */ + accI = vmlaq_f32(accI,vec1.val[1],vec2.val[0]); + accI = vmlaq_f32(accI,vec1.val[0],vec2.val[1]); + + vec3 = vld2q_f32(pSrcA); + vec4 = vld2q_f32(pSrcB); + + /* Increment pointers */ + pSrcA += 8; + pSrcB += 8; + + /* Re{C} = Re{A}*Re{B} - Im{A}*Im{B} */ + accR = vmlaq_f32(accR,vec3.val[0],vec4.val[0]); + accR = vmlsq_f32(accR,vec3.val[1],vec4.val[1]); + + /* Im{C} = Re{A}*Im{B} + Im{A}*Re{B} */ + accI = vmlaq_f32(accI,vec3.val[1],vec4.val[0]); + accI = vmlaq_f32(accI,vec3.val[0],vec4.val[1]); + + /* Decrement the loop counter */ + blkCnt--; + } + + accum = vpadd_f32(vget_low_f32(accR), vget_high_f32(accR)); + real_sum += accum[0] + accum[1]; + + accum = vpadd_f32(vget_low_f32(accI), vget_high_f32(accI)); + imag_sum += accum[0] + accum[1]; + + /* Tail */ + blkCnt = numSamples & 0x7; + +#else +#if defined (ARM_MATH_LOOPUNROLL) + + /* Loop unrolling: Compute 4 outputs at a time */ + blkCnt = numSamples >> 2U; + + while (blkCnt > 0U) + { + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += a0 * c0; + imag_sum += a0 * d0; + real_sum -= b0 * d0; + imag_sum += b0 * c0; + + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += a0 * c0; + imag_sum += a0 * d0; + real_sum -= b0 * d0; + imag_sum += b0 * c0; + + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += a0 * c0; + imag_sum += a0 * d0; + real_sum -= b0 * d0; + imag_sum += b0 * c0; + + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += a0 * c0; + imag_sum += a0 * d0; + real_sum -= b0 * d0; + imag_sum += b0 * c0; + + /* 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) */ +#endif /* #if defined(ARM_MATH_NEON) */ + + while (blkCnt > 0U) + { + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += a0 * c0; + imag_sum += a0 * d0; + real_sum -= b0 * d0; + imag_sum += b0 * c0; + + /* Decrement loop counter */ + blkCnt--; + } + + /* Store real and imaginary result in destination buffer. */ + *realResult = real_sum; + *imagResult = imag_sum; +} + +/** + @} end of cmplx_dot_prod group + */ -- cgit v1.2.3