diff options
Diffstat (limited to 'fw/midi-dials/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c')
| -rw-r--r-- | fw/midi-dials/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/fw/midi-dials/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c b/fw/midi-dials/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c new file mode 100644 index 0000000..aaa3ec0 --- /dev/null +++ b/fw/midi-dials/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c @@ -0,0 +1,211 @@ +/* ----------------------------------------------------------------------
+ * Project: CMSIS DSP Library
+ * Title: arm_cmplx_mult_real_q31.c
+ * Description: Q31 complex by real 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
+ */
+
+/**
+ * @addtogroup CmplxByRealMult
+ * @{
+ */
+
+
+/**
+ * @brief Q31 complex-by-real multiplication
+ * @param[in] *pSrcCmplx points to the complex input vector
+ * @param[in] *pSrcReal points to the real input vector
+ * @param[out] *pCmplxDst points to the complex output vector
+ * @param[in] numSamples number of samples in each vector
+ * @return none.
+ *
+ * <b>Scaling and Overflow Behavior:</b>
+ * \par
+ * The function uses saturating arithmetic.
+ * Results outside of the allowable Q31 range[0x80000000 0x7FFFFFFF] will be saturated.
+ */
+
+void arm_cmplx_mult_real_q31(
+ q31_t * pSrcCmplx,
+ q31_t * pSrcReal,
+ q31_t * pCmplxDst,
+ uint32_t numSamples)
+{
+ q31_t inA1; /* Temporary variable to store input value */
+
+#if defined (ARM_MATH_DSP)
+
+ /* Run the below code for Cortex-M4 and Cortex-M3 */
+ uint32_t blkCnt; /* loop counters */
+ q31_t inA2, inA3, inA4; /* Temporary variables to hold input data */
+ q31_t inB1, inB2; /* Temporary variabels to hold input data */
+ q31_t out1, out2, out3, out4; /* Temporary variables to hold output data */
+
+ /* 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[i]. */
+ /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */
+ /* read real input from complex input buffer */
+ inA1 = *pSrcCmplx++;
+ inA2 = *pSrcCmplx++;
+ /* read input from real input bufer */
+ inB1 = *pSrcReal++;
+ inB2 = *pSrcReal++;
+ /* read imaginary input from complex input buffer */
+ inA3 = *pSrcCmplx++;
+ inA4 = *pSrcCmplx++;
+
+ /* multiply complex input with real input */
+ out1 = ((q63_t) inA1 * inB1) >> 32;
+ out2 = ((q63_t) inA2 * inB1) >> 32;
+ out3 = ((q63_t) inA3 * inB2) >> 32;
+ out4 = ((q63_t) inA4 * inB2) >> 32;
+
+ /* sature the result */
+ out1 = __SSAT(out1, 31);
+ out2 = __SSAT(out2, 31);
+ out3 = __SSAT(out3, 31);
+ out4 = __SSAT(out4, 31);
+
+ /* get result in 1.31 format */
+ out1 = out1 << 1;
+ out2 = out2 << 1;
+ out3 = out3 << 1;
+ out4 = out4 << 1;
+
+ /* store the result to destination buffer */
+ *pCmplxDst++ = out1;
+ *pCmplxDst++ = out2;
+ *pCmplxDst++ = out3;
+ *pCmplxDst++ = out4;
+
+ /* read real input from complex input buffer */
+ inA1 = *pSrcCmplx++;
+ inA2 = *pSrcCmplx++;
+ /* read input from real input bufer */
+ inB1 = *pSrcReal++;
+ inB2 = *pSrcReal++;
+ /* read imaginary input from complex input buffer */
+ inA3 = *pSrcCmplx++;
+ inA4 = *pSrcCmplx++;
+
+ /* multiply complex input with real input */
+ out1 = ((q63_t) inA1 * inB1) >> 32;
+ out2 = ((q63_t) inA2 * inB1) >> 32;
+ out3 = ((q63_t) inA3 * inB2) >> 32;
+ out4 = ((q63_t) inA4 * inB2) >> 32;
+
+ /* sature the result */
+ out1 = __SSAT(out1, 31);
+ out2 = __SSAT(out2, 31);
+ out3 = __SSAT(out3, 31);
+ out4 = __SSAT(out4, 31);
+
+ /* get result in 1.31 format */
+ out1 = out1 << 1;
+ out2 = out2 << 1;
+ out3 = out3 << 1;
+ out4 = out4 << 1;
+
+ /* store the result to destination buffer */
+ *pCmplxDst++ = out1;
+ *pCmplxDst++ = out2;
+ *pCmplxDst++ = out3;
+ *pCmplxDst++ = out4;
+
+ /* 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;
+
+ while (blkCnt > 0U)
+ {
+ /* C[2 * i] = A[2 * i] * B[i]. */
+ /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */
+ /* read real input from complex input buffer */
+ inA1 = *pSrcCmplx++;
+ inA2 = *pSrcCmplx++;
+ /* read input from real input bufer */
+ inB1 = *pSrcReal++;
+
+ /* multiply complex input with real input */
+ out1 = ((q63_t) inA1 * inB1) >> 32;
+ out2 = ((q63_t) inA2 * inB1) >> 32;
+
+ /* sature the result */
+ out1 = __SSAT(out1, 31);
+ out2 = __SSAT(out2, 31);
+
+ /* get result in 1.31 format */
+ out1 = out1 << 1;
+ out2 = out2 << 1;
+
+ /* store the result to destination buffer */
+ *pCmplxDst++ = out1;
+ *pCmplxDst++ = out2;
+
+ /* Decrement the numSamples loop counter */
+ blkCnt--;
+ }
+
+#else
+
+ /* Run the below code for Cortex-M0 */
+
+ while (numSamples > 0U)
+ {
+ /* realOut = realA * realB. */
+ /* imagReal = imagA * realB. */
+ inA1 = *pSrcReal++;
+ /* store the result in the destination buffer. */
+ *pCmplxDst++ =
+ (q31_t) clip_q63_to_q31(((q63_t) * pSrcCmplx++ * inA1) >> 31);
+ *pCmplxDst++ =
+ (q31_t) clip_q63_to_q31(((q63_t) * pSrcCmplx++ * inA1) >> 31);
+
+ /* Decrement the numSamples loop counter */
+ numSamples--;
+ }
+
+#endif /* #if defined (ARM_MATH_DSP) */
+
+}
+
+/**
+ * @} end of CmplxByRealMult group
+ */
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