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Diffstat (limited to 'fw/midi-dials/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_cmplx_f32.c')
| -rw-r--r-- | fw/midi-dials/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_cmplx_f32.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/fw/midi-dials/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_cmplx_f32.c b/fw/midi-dials/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_cmplx_f32.c new file mode 100644 index 0000000..90af35a --- /dev/null +++ b/fw/midi-dials/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_cmplx_f32.c @@ -0,0 +1,196 @@ +/* ----------------------------------------------------------------------
+ * Project: CMSIS DSP Library
+ * Title: arm_cmplx_mult_cmplx_f32.c
+ * Description: Floating-point complex-by-complex multiplication
+ *
+ * $Date: 27. January 2017
+ * $Revision: V.1.5.1
+ *
+ * Target Processor: Cortex-M cores
+ * -------------------------------------------------------------------- */
+/*
+ * Copyright (C) 2010-2017 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 CmplxByCmplxMult Complex-by-Complex Multiplication
+ *
+ * Multiplies a complex vector by another complex 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.
+ *
+ * The underlying algorithm is used:
+ *
+ * <pre>
+ * for(n=0; n<numSamples; n++) {
+ * pDst[(2*n)+0] = pSrcA[(2*n)+0] * pSrcB[(2*n)+0] - pSrcA[(2*n)+1] * pSrcB[(2*n)+1];
+ * pDst[(2*n)+1] = pSrcA[(2*n)+0] * pSrcB[(2*n)+1] + pSrcA[(2*n)+1] * pSrcB[(2*n)+0];
+ * }
+ * </pre>
+ *
+ * There are separate functions for floating-point, Q15, and Q31 data types.
+ */
+
+/**
+ * @addtogroup CmplxByCmplxMult
+ * @{
+ */
+
+
+/**
+ * @brief Floating-point complex-by-complex multiplication
+ * @param[in] *pSrcA points to the first input vector
+ * @param[in] *pSrcB points to the second input vector
+ * @param[out] *pDst points to the output vector
+ * @param[in] numSamples number of complex samples in each vector
+ * @return none.
+ */
+
+void arm_cmplx_mult_cmplx_f32(
+ float32_t * pSrcA,
+ float32_t * pSrcB,
+ float32_t * pDst,
+ uint32_t numSamples)
+{
+ float32_t a1, b1, c1, d1; /* Temporary variables to store real and imaginary values */
+ uint32_t blkCnt; /* loop counters */
+
+#if defined (ARM_MATH_DSP)
+
+ /* Run the below code for Cortex-M4 and Cortex-M3 */
+ float32_t a2, b2, c2, d2; /* Temporary variables to store real and imaginary values */
+ float32_t acc1, acc2, acc3, acc4;
+
+
+ /* 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[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
+ /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
+ a1 = *pSrcA; /* A[2 * i] */
+ c1 = *pSrcB; /* B[2 * i] */
+
+ b1 = *(pSrcA + 1); /* A[2 * i + 1] */
+ acc1 = a1 * c1; /* acc1 = A[2 * i] * B[2 * i] */
+
+ a2 = *(pSrcA + 2); /* A[2 * i + 2] */
+ acc2 = (b1 * c1); /* acc2 = A[2 * i + 1] * B[2 * i] */
+
+ d1 = *(pSrcB + 1); /* B[2 * i + 1] */
+ c2 = *(pSrcB + 2); /* B[2 * i + 2] */
+ acc1 -= b1 * d1; /* acc1 = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1] */
+
+ d2 = *(pSrcB + 3); /* B[2 * i + 3] */
+ acc3 = a2 * c2; /* acc3 = A[2 * i + 2] * B[2 * i + 2] */
+
+ b2 = *(pSrcA + 3); /* A[2 * i + 3] */
+ acc2 += (a1 * d1); /* acc2 = A[2 * i + 1] * B[2 * i] + A[2 * i] * B[2 * i + 1] */
+
+ a1 = *(pSrcA + 4); /* A[2 * i + 4] */
+ acc4 = (a2 * d2); /* acc4 = A[2 * i + 2] * B[2 * i + 3] */
+
+ c1 = *(pSrcB + 4); /* B[2 * i + 4] */
+ acc3 -= (b2 * d2); /* acc3 = A[2 * i + 2] * B[2 * i + 2] - A[2 * i + 3] * B[2 * i + 3] */
+ *pDst = acc1; /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1] */
+
+ b1 = *(pSrcA + 5); /* A[2 * i + 5] */
+ acc4 += b2 * c2; /* acc4 = A[2 * i + 2] * B[2 * i + 3] + A[2 * i + 3] * B[2 * i + 2] */
+
+ *(pDst + 1) = acc2; /* C[2 * i + 1] = A[2 * i + 1] * B[2 * i] + A[2 * i] * B[2 * i + 1] */
+ acc1 = (a1 * c1);
+
+ d1 = *(pSrcB + 5);
+ acc2 = (b1 * c1);
+
+ *(pDst + 2) = acc3;
+ *(pDst + 3) = acc4;
+
+ a2 = *(pSrcA + 6);
+ acc1 -= (b1 * d1);
+
+ c2 = *(pSrcB + 6);
+ acc2 += (a1 * d1);
+
+ b2 = *(pSrcA + 7);
+ acc3 = (a2 * c2);
+
+ d2 = *(pSrcB + 7);
+ acc4 = (b2 * c2);
+
+ *(pDst + 4) = acc1;
+ pSrcA += 8U;
+
+ acc3 -= (b2 * d2);
+ acc4 += (a2 * d2);
+
+ *(pDst + 5) = acc2;
+ pSrcB += 8U;
+
+ *(pDst + 6) = acc3;
+ *(pDst + 7) = acc4;
+
+ pDst += 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 /* #if defined (ARM_MATH_DSP) */
+
+ while (blkCnt > 0U)
+ {
+ /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
+ /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
+ a1 = *pSrcA++;
+ b1 = *pSrcA++;
+ c1 = *pSrcB++;
+ d1 = *pSrcB++;
+
+ /* store the result in the destination buffer. */
+ *pDst++ = (a1 * c1) - (b1 * d1);
+ *pDst++ = (a1 * d1) + (b1 * c1);
+
+ /* Decrement the numSamples loop counter */
+ blkCnt--;
+ }
+}
+
+/**
+ * @} end of CmplxByCmplxMult group
+ */
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