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-rw-r--r--Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mean_q7.c265
1 files changed, 112 insertions, 153 deletions
diff --git a/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mean_q7.c b/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mean_q7.c
index f0701eb..3f90ea8 100644
--- a/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mean_q7.c
+++ b/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mean_q7.c
@@ -1,153 +1,112 @@
-/* ----------------------------------------------------------------------
- * Project: CMSIS DSP Library
- * Title: arm_mean_q7.c
- * Description: Mean value of a Q7 vector
- *
- * $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/statistics_functions.h"
-
-/**
- @ingroup groupStats
- */
-
-/**
- @addtogroup mean
- @{
- */
-
-/**
- @brief Mean value of a Q7 vector.
- @param[in] pSrc points to the input vector
- @param[in] blockSize number of samples in input vector
- @param[out] pResult mean value returned here
- @return none
-
- @par Scaling and Overflow Behavior
- The function is implemented using a 32-bit internal accumulator.
- The input is represented in 1.7 format and is accumulated in a 32-bit
- accumulator in 25.7 format.
- There is no risk of internal overflow with this approach, and the
- full precision of intermediate result is preserved.
- Finally, the accumulator is truncated to yield a result of 1.7 format.
- */
-
-#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
-
-void arm_mean_q7(
- const q7_t * pSrc,
- uint32_t blockSize,
- q7_t * pResult)
-{
- uint32_t blkCnt; /* loop counters */
- q7x16_t vecSrc;
- q31_t sum = 0L;
-
-
- blkCnt = blockSize >> 4;
- while (blkCnt > 0U)
- {
- vecSrc = vldrbq_s8(pSrc);
- /*
- * sum lanes
- */
- sum = vaddvaq(sum, vecSrc);
-
- blkCnt--;
- pSrc += 16;
- }
-
- blkCnt = blockSize & 0xF;
- while (blkCnt > 0U)
- {
- /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
- sum += *pSrc++;
-
- /* Decrement loop counter */
- blkCnt--;
- }
-
- /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) / blockSize */
- /* Store the result to the destination */
- *pResult = (q7_t) (sum / (int32_t) blockSize);
-}
-#else
-void arm_mean_q7(
- const q7_t * pSrc,
- uint32_t blockSize,
- q7_t * pResult)
-{
- uint32_t blkCnt; /* Loop counter */
- q31_t sum = 0; /* Temporary result storage */
-
-#if defined (ARM_MATH_LOOPUNROLL)
- q31_t in;
-#endif
-
-#if defined (ARM_MATH_LOOPUNROLL)
-
- /* Loop unrolling: Compute 4 outputs at a time */
- blkCnt = blockSize >> 2U;
-
- while (blkCnt > 0U)
- {
- /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
- in = read_q7x4_ia (&pSrc);
- sum += ((in << 24U) >> 24U);
- sum += ((in << 16U) >> 24U);
- sum += ((in << 8U) >> 24U);
- sum += (in >> 24U);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* Loop unrolling: Compute remaining outputs */
- blkCnt = blockSize % 0x4U;
-
-#else
-
- /* Initialize blkCnt with number of samples */
- blkCnt = blockSize;
-
-#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
-
- while (blkCnt > 0U)
- {
- /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
- sum += *pSrc++;
-
- /* Decrement loop counter */
- blkCnt--;
- }
-
- /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) / blockSize */
- /* Store result to destination */
- *pResult = (q7_t) (sum / (int32_t) blockSize);
-}
-#endif /* defined(ARM_MATH_MVEI) */
-
-/**
- @} end of mean group
- */
+/* ----------------------------------------------------------------------
+ * Project: CMSIS DSP Library
+ * Title: arm_mean_q7.c
+ * Description: Mean value of a Q7 vector
+ *
+ * $Date: 18. March 2019
+ * $Revision: V1.6.0
+ *
+ * Target Processor: Cortex-M cores
+ * -------------------------------------------------------------------- */
+/*
+ * Copyright (C) 2010-2019 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 mean
+ @{
+ */
+
+/**
+ @brief Mean value of a Q7 vector.
+ @param[in] pSrc points to the input vector
+ @param[in] blockSize number of samples in input vector
+ @param[out] pResult mean value returned here
+ @return none
+
+ @par Scaling and Overflow Behavior
+ The function is implemented using a 32-bit internal accumulator.
+ The input is represented in 1.7 format and is accumulated in a 32-bit
+ accumulator in 25.7 format.
+ There is no risk of internal overflow with this approach, and the
+ full precision of intermediate result is preserved.
+ Finally, the accumulator is truncated to yield a result of 1.7 format.
+ */
+
+void arm_mean_q7(
+ const q7_t * pSrc,
+ uint32_t blockSize,
+ q7_t * pResult)
+{
+ uint32_t blkCnt; /* Loop counter */
+ q31_t sum = 0; /* Temporary result storage */
+
+#if defined (ARM_MATH_LOOPUNROLL)
+ q31_t in;
+#endif
+
+#if defined (ARM_MATH_LOOPUNROLL)
+
+ /* Loop unrolling: Compute 4 outputs at a time */
+ blkCnt = blockSize >> 2U;
+
+ while (blkCnt > 0U)
+ {
+ /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
+ in = read_q7x4_ia ((q7_t **) &pSrc);
+ sum += ((in << 24U) >> 24U);
+ sum += ((in << 16U) >> 24U);
+ sum += ((in << 8U) >> 24U);
+ sum += (in >> 24U);
+
+ /* Decrement the loop counter */
+ blkCnt--;
+ }
+
+ /* Loop unrolling: Compute remaining outputs */
+ blkCnt = blockSize % 0x4U;
+
+#else
+
+ /* Initialize blkCnt with number of samples */
+ blkCnt = blockSize;
+
+#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
+
+ while (blkCnt > 0U)
+ {
+ /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
+ sum += *pSrc++;
+
+ /* Decrement loop counter */
+ blkCnt--;
+ }
+
+ /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) / blockSize */
+ /* Store result to destination */
+ *pResult = (q7_t) (sum / (int32_t) blockSize);
+}
+
+/**
+ @} end of mean group
+ */
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