From 5b81bc8ccbd342b8566d88fc9f17a73aec03b5b6 Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <clyne@bitgloo.com>
Date: Wed, 29 Jan 2025 21:34:25 -0500
Subject: initial commit
---
.../ComplexMathFunctions/arm_cmplx_mag_q15.c | 268 +++++++++++++++++++++
1 file changed, 268 insertions(+)
create mode 100644 Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mag_q15.c
(limited to 'Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mag_q15.c')
diff --git a/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mag_q15.c b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mag_q15.c
new file mode 100644
index 0000000..10ce335
--- /dev/null
+++ b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mag_q15.c
@@ -0,0 +1,268 @@
+/* ----------------------------------------------------------------------
+ * Project: CMSIS DSP Library
+ * Title: arm_cmplx_mag_q15.c
+ * Description: Q15 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 "dsp/complex_math_functions.h"
+
+/**
+ @ingroup groupCmplxMath
+ */
+
+/**
+ @addtogroup cmplx_mag
+ @{
+ */
+
+/**
+ @brief Q15 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
+ @return none
+
+ @par Scaling and Overflow Behavior
+ The function implements 1.15 by 1.15 multiplications and finally output is converted into 2.14 format.
+ */
+
+/* Sqrt q31 is used otherwise accuracy is not good enough
+ for small values and for some applications it is
+ an issue.
+ */
+#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
+
+#include "arm_helium_utils.h"
+
+void arm_cmplx_mag_q15(
+ const q15_t * pSrc,
+ q15_t * pDst,
+ uint32_t numSamples)
+{
+
+ int32_t blockSize = numSamples; /* loop counters */
+ uint32_t blkCnt; /* loop counters */
+ q15x8x2_t vecSrc;
+ q31x4_t prod0;
+ q31x4_t prod1;
+
+ q31_t in;
+ q31_t acc0;
+ q31x4_t acc0V;
+ q31x4_t acc1V;
+
+ q31_t res;
+ q15x8_t resV;
+
+ blkCnt = blockSize >> 3;
+ while (blkCnt > 0U)
+ {
+ vecSrc = vld2q(pSrc);
+ pSrc += 16;
+
+ acc0V = vdupq_n_s32(0);
+ acc1V = vdupq_n_s32(0);
+
+ prod0 = vmullbq_int_s16(vecSrc.val[0], vecSrc.val[0]);
+ acc0V = vqaddq_s32(acc0V,prod0);
+
+ prod0 = vmullbq_int_s16(vecSrc.val[1], vecSrc.val[1]);
+ acc0V = vqaddq_s32(acc0V,prod0);
+
+
+ prod1 = vmulltq_int_s16(vecSrc.val[0], vecSrc.val[0]);
+ acc1V = vqaddq_s32(acc1V,prod1);
+
+ prod1 = vmulltq_int_s16(vecSrc.val[1], vecSrc.val[1]);
+ acc1V = vqaddq_s32(acc1V,prod1);
+
+
+
+ acc0V = vshrq(acc0V, 1);
+ acc1V = vshrq(acc1V, 1);
+
+ acc0V = FAST_VSQRT_Q31(acc0V);
+ acc1V = FAST_VSQRT_Q31(acc1V);
+
+ resV = vdupq_n_s16(0);
+ resV = vqshrnbq_n_s32(resV,acc0V,16);
+ resV = vqshrntq_n_s32(resV,acc1V,16);
+
+ vst1q(pDst, resV);
+ pDst += 8;
+ /*
+ * Decrement the blockSize loop counter
+ */
+ blkCnt--;
+ }
+
+ /*
+ * tail
+ */
+ blkCnt = blockSize & 7;
+
+ while (blkCnt > 0U)
+ {
+ /* C[0] = sqrt(A[0] * A[0] + A[1] * A[1]) */
+
+ in = read_q15x2_ia ((q15_t **) &pSrc);
+ acc0 = __SMUAD(in, in);
+
+ /* store result in 2.14 format in destination buffer. */
+ arm_sqrt_q31(acc0 >> 1 , &res);
+ *pDst++ = res >> 16;
+
+
+ /* Decrement loop counter */
+ blkCnt--;
+ }
+}
+
+#else
+void arm_cmplx_mag_q15(
+ const q15_t * pSrc,
+ q15_t * pDst,
+ uint32_t numSamples)
+{
+ q31_t res; /* temporary result */
+ uint32_t blkCnt; /* Loop counter */
+
+#if defined (ARM_MATH_DSP)
+ q31_t in;
+ q31_t acc0; /* Accumulators */
+#else
+ q15_t real, imag; /* Temporary input variables */
+ q31_t acc0, acc1; /* Accumulators */
+#endif
+
+#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]) */
+
+#if defined (ARM_MATH_DSP)
+ in = read_q15x2_ia (&pSrc);
+ acc0 = __SMUAD(in, in);
+ /* store result in 2.14 format in destination buffer. */
+ arm_sqrt_q31(acc0 >> 1 , &res);
+ *pDst++ = res >> 16;
+
+ in = read_q15x2_ia (&pSrc);
+ acc0 = __SMUAD(in, in);
+ arm_sqrt_q31(acc0 >> 1 , &res);
+ *pDst++ = res >> 16;
+
+ in = read_q15x2_ia (&pSrc);
+ acc0 = __SMUAD(in, in);
+ arm_sqrt_q31(acc0 >> 1 , &res);
+ *pDst++ = res >> 16;
+
+ in = read_q15x2_ia (&pSrc);
+ acc0 = __SMUAD(in, in);
+ arm_sqrt_q31(acc0 >> 1 , &res);
+ *pDst++ = res >> 16;
+#else
+ real = *pSrc++;
+ imag = *pSrc++;
+ acc0 = ((q31_t) real * real);
+ acc1 = ((q31_t) imag * imag);
+
+ /* store result in 2.14 format in destination buffer. */
+ arm_sqrt_q31((acc0 + acc1) >> 1 , &res);
+ *pDst++ = res >> 16;
+
+ real = *pSrc++;
+ imag = *pSrc++;
+ acc0 = ((q31_t) real * real);
+ acc1 = ((q31_t) imag * imag);
+ arm_sqrt_q31((acc0 + acc1) >> 1 , &res);
+ *pDst++ = res >> 16;
+
+ real = *pSrc++;
+ imag = *pSrc++;
+ acc0 = ((q31_t) real * real);
+ acc1 = ((q31_t) imag * imag);
+ arm_sqrt_q31((acc0 + acc1) >> 1 , &res);
+ *pDst++ = res >> 16;
+
+ real = *pSrc++;
+ imag = *pSrc++;
+ acc0 = ((q31_t) real * real);
+ acc1 = ((q31_t) imag * imag);
+ arm_sqrt_q31((acc0 + acc1) >> 1 , &res);
+ *pDst++ = res >> 16;
+#endif /* #if defined (ARM_MATH_DSP) */
+
+ /* 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]) */
+
+#if defined (ARM_MATH_DSP)
+ in = read_q15x2_ia (&pSrc);
+ acc0 = __SMUAD(in, in);
+
+ /* store result in 2.14 format in destination buffer. */
+ arm_sqrt_q31(acc0 >> 1 , &res);
+ *pDst++ = res >> 16;
+#else
+ real = *pSrc++;
+ imag = *pSrc++;
+ acc0 = ((q31_t) real * real);
+ acc1 = ((q31_t) imag * imag);
+
+ /* store result in 2.14 format in destination buffer. */
+ arm_sqrt_q31((acc0 + acc1) >> 1 , &res);
+ *pDst++ = res >> 16;
+
+#endif
+
+ /* Decrement loop counter */
+ blkCnt--;
+ }
+
+}
+#endif /* defined(ARM_MATH_MVEI) */
+
+/**
+ @} end of cmplx_mag group
+ */
--
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