init commit

Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_absmax_f64.c

@@ -0,0 +1,92 @@
+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_absmax_f64.c
+ * Description:  Maximum value of absolute values of a floating-point vector
+ *
+ * $Date:        13 September 2021
+ * $Revision:    V1.10.0
+ *
+ * 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/statistics_functions.h"
+
+/**
+  @ingroup groupStats
+ */
+
+/**
+  @addtogroup AbsMax
+  @{
+ */
+
+/**
+  @brief         Maximum value of absolute values of a floating-point vector.
+  @param[in]     pSrc       points to the input vector
+  @param[in]     blockSize  number of samples in input vector
+  @param[out]    pResult    maximum value returned here
+  @param[out]    pIndex     index of maximum value returned here
+  @return        none
+ */
+void arm_absmax_f64(
+  const float64_t * pSrc,
+        uint32_t blockSize,
+        float64_t * pResult,
+        uint32_t * pIndex)
+{
+        float64_t maxVal, out;                         /* Temporary variables to store the output value. */
+        uint32_t blkCnt, outIndex;                     /* Loop counter */
+
+
+
+  /* Initialise index value to zero. */
+  outIndex = 0U;
+
+  /* Load first input value that act as reference value for comparision */
+  out = fabs(*pSrc++);
+
+  /* Initialize blkCnt with number of samples */
+  blkCnt = (blockSize - 1U);
+
+  while (blkCnt > 0U)
+  {
+    /* Initialize maxVal to the next consecutive values one by one */
+    maxVal = fabs(*pSrc++);
+
+    /* compare for the maximum value */
+    if (out < maxVal)
+    {
+      /* Update the maximum value and it's index */
+      out = maxVal;
+      outIndex = blockSize - blkCnt;
+    }
+
+    /* Decrement loop counter */
+    blkCnt--;
+  }
+
+  /* Store the maximum value and it's index into destination pointers */
+  *pResult = out;
+  *pIndex = outIndex;
+}
+
+/**
+  @} end of AbsMax group
+ */