Submodule-cache WIP

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diff --git a/fw/midi-dials/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_std_q31.c b/fw/midi-dials/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_std_q31.c
deleted file mode 100644
index 806a90e..0000000
--- a/fw/midi-dials/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_std_q31.c
+++ /dev/null
@@ -1,169 +0,0 @@
-/* ----------------------------------------------------------------------

- * Project:      CMSIS DSP Library

- * Title:        arm_std_q31.c

- * Description:  Standard deviation of an array of Q31 type.

- *

- * $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 groupStats

- */

-

-/**

- * @addtogroup STD

- * @{

- */

-

-/**

- * @brief Standard deviation of the elements of a Q31 vector.

- * @param[in]       *pSrc points to the input vector

- * @param[in]       blockSize length of the input vector

- * @param[out]      *pResult standard deviation value returned here

- * @return none.

- * @details

- * <b>Scaling and Overflow Behavior:</b>

- *

- *\par

- * The function is implemented using an internal 64-bit accumulator.

- * The input is represented in 1.31 format, which is then downshifted by 8 bits

- * which yields 1.23, and intermediate multiplication yields a 2.46 format.

- * The accumulator maintains full precision of the intermediate multiplication results,

- * but provides only a 16 guard bits.

- * There is no saturation on intermediate additions.

- * If the accumulator overflows it wraps around and distorts the result.

- * In order to avoid overflows completely the input signal must be scaled down by

- * log2(blockSize)-8 bits, as a total of blockSize additions are performed internally.

- * After division, internal variables should be Q18.46

- * Finally, the 18.46 accumulator is right shifted by 15 bits to yield a 1.31 format value.

- *

- */

-

-void arm_std_q31(

-  q31_t * pSrc,

-  uint32_t blockSize,

-  q31_t * pResult)

-{

-  q63_t sum = 0;                                 /* Accumulator */

-  q63_t meanOfSquares, squareOfMean;             /* square of mean and mean of square */

-  q31_t in;                                      /* input value */

-  uint32_t blkCnt;                               /* loop counter */

-  q63_t sumOfSquares = 0;                        /* Accumulator */

-

-  if (blockSize == 1U)

-  {

-    *pResult = 0;

-    return;

-  }

-

-#if defined (ARM_MATH_DSP)

-  /* Run the below code for Cortex-M4 and Cortex-M3 */

-

-  /*loop Unrolling */

-  blkCnt = blockSize >> 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 = (A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1])  */

-    /* Compute Sum of squares of the input samples

-     * and then store the result in a temporary variable, sum. */

-    in = *pSrc++ >> 8U;

-    sum += in;

-    sumOfSquares += ((q63_t) (in) * (in));

-    in = *pSrc++ >> 8U;

-    sum += in;

-    sumOfSquares += ((q63_t) (in) * (in));

-    in = *pSrc++ >> 8U;

-    sum += in;

-    sumOfSquares += ((q63_t) (in) * (in));

-    in = *pSrc++ >> 8U;

-    sum += in;

-    sumOfSquares += ((q63_t) (in) * (in));

-

-    /* Decrement the loop counter */

-    blkCnt--;

-  }

-

-  /* If the blockSize is not a multiple of 4, compute any remaining output samples here.

-   ** No loop unrolling is used. */

-  blkCnt = blockSize % 0x4U;

-

-  while (blkCnt > 0U)

-  {

-    /* C = (A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1]) */

-    /* Compute Sum of squares of the input samples

-     * and then store the result in a temporary variable, sum. */

-    in = *pSrc++ >> 8U;

-    sum += in;

-    sumOfSquares += ((q63_t) (in) * (in));

-

-    /* Decrement the loop counter */

-    blkCnt--;

-  }

-

-  /* Compute Mean of squares of the input samples

-   * and then store the result in a temporary variable, meanOfSquares. */

-  meanOfSquares = sumOfSquares / (q63_t)(blockSize - 1U);

-

-#else

-  /* Run the below code for Cortex-M0 */

-

-  /* Loop over blockSize number of values */

-  blkCnt = blockSize;

-

-  while (blkCnt > 0U)

-  {

-    /* C = (A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1]) */

-    /* Compute Sum of squares of the input samples

-     * and then store the result in a temporary variable, sumOfSquares. */

-    in = *pSrc++ >> 8U;

-    sumOfSquares += ((q63_t) (in) * (in));

-

-    /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */

-    /* Compute sum of all input values and then store the result in a temporary variable, sum. */

-    sum += in;

-

-    /* Decrement the loop counter */

-    blkCnt--;

-  }

-

-  /* Compute Mean of squares of the input samples

-   * and then store the result in a temporary variable, meanOfSquares. */

-  meanOfSquares = sumOfSquares / (q63_t)(blockSize - 1U);

-

-#endif /* #if defined (ARM_MATH_DSP) */

-

-  /* Compute square of mean */

-  squareOfMean = sum * sum / (q63_t)(blockSize * (blockSize - 1U));

-

-  /* Compute standard deviation and then store the result to the destination */

-  arm_sqrt_q31((meanOfSquares - squareOfMean) >> 15U, pResult);

-}

-

-/**

- * @} end of STD group

- */