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| author | joshua <joshua@joshuayun.com> | 2023-12-30 23:54:31 -0500 |
|---|---|---|
| committer | joshua <joshua@joshuayun.com> | 2023-12-30 23:54:31 -0500 |
| commit | 86608c6770cf08c138a2bdab5855072f64be09ef (patch) | |
| tree | 494a61b3ef37e76f9235a0d10f5c93d97290a35f /Drivers/CMSIS/NN/Source/ActivationFunctions/arm_nn_activations_q7.c | |
| download | sdr-software-master.tar.gz | |
Diffstat (limited to 'Drivers/CMSIS/NN/Source/ActivationFunctions/arm_nn_activations_q7.c')
| -rw-r--r-- | Drivers/CMSIS/NN/Source/ActivationFunctions/arm_nn_activations_q7.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/Drivers/CMSIS/NN/Source/ActivationFunctions/arm_nn_activations_q7.c b/Drivers/CMSIS/NN/Source/ActivationFunctions/arm_nn_activations_q7.c new file mode 100644 index 0000000..2953bd5 --- /dev/null +++ b/Drivers/CMSIS/NN/Source/ActivationFunctions/arm_nn_activations_q7.c @@ -0,0 +1,91 @@ +/*
+ * Copyright (C) 2010-2018 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.
+ */
+
+/* ----------------------------------------------------------------------
+ * Project: CMSIS NN Library
+ * Title: arm_nn_activations_q7.c
+ * Description: Q7 neural network activation function using direct table look-up
+ *
+ * $Date: 17. January 2018
+ * $Revision: V.1.0.0
+ *
+ * Target Processor: Cortex-M cores
+ *
+ * -------------------------------------------------------------------- */
+
+#include "arm_math.h"
+#include "arm_common_tables.h"
+#include "arm_nnfunctions.h"
+
+/**
+ * @ingroup groupNN
+ */
+
+/**
+ * @addtogroup Acti
+ * @{
+ */
+
+ /**
+ * @brief Q7 neural network activation function using direct table look-up
+ * @param[in,out] data pointer to input
+ * @param[in] size number of elements
+ * @param[in] int_width bit-width of the integer part, assume to be smaller than 3
+ * @param[in] type type of activation functions
+ * @return none.
+ *
+ * @details
+ *
+ * This is the direct table look-up approach.
+ *
+ * Assume here the integer part of the fixed-point is <= 3.
+ * More than 3 just not making much sense, makes no difference with
+ * saturation followed by any of these activation functions.
+ */
+
+void arm_nn_activations_direct_q7(q7_t * data, uint16_t size, uint16_t int_width, arm_nn_activation_type type)
+{
+ uint16_t i = size;
+ q7_t *pIn = data;
+ q7_t *pOut = data;
+ q7_t in;
+ q7_t out;
+ uint16_t shift_size = 3 - int_width;
+ const q7_t *lookup_table;
+ switch (type)
+ {
+ case ARM_SIGMOID:
+ lookup_table = sigmoidTable_q7;
+ break;
+ case ARM_TANH:
+ default:
+ lookup_table = tanhTable_q7;
+ break;
+ }
+ while (i)
+ {
+ in = *pIn++;
+ out = lookup_table[(uint8_t) (in >> shift_size)];
+ *pOut++ = out;
+ i--;
+ }
+}
+
+/**
+ * @} end of Acti group
+ */
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