From 73023027d6250daaa1df49fdeb1d21e59a0bf7f5 Mon Sep 17 00:00:00 2001
From: Giorgio Arena <giorgio.arena@arm.com>
Date: Tue, 4 Sep 2018 14:55:55 +0100
Subject: COMPMID-1539 Implement YOLOLayer on CL

Change-Id: I332c0703e1399fca0c5b724529b54a28f49c88da
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/146842
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
---
 src/core/CL/cl_kernels/activation_helpers.h | 99 +++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 src/core/CL/cl_kernels/activation_helpers.h

(limited to 'src/core/CL/cl_kernels/activation_helpers.h')

diff --git a/src/core/CL/cl_kernels/activation_helpers.h b/src/core/CL/cl_kernels/activation_helpers.h
new file mode 100644
index 0000000000..dfab082381
--- /dev/null
+++ b/src/core/CL/cl_kernels/activation_helpers.h
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "helpers.h"
+
+#if defined(TYPE) && defined(SELECT_TYPE)
+
+#define CONST_ONE 1.f
+#define ABS_OP(a) fabs((a))
+#define ADD_OP(a, b) ((a) + (b))
+#define SUB_OP(a, b) ((a) - (b))
+#define MUL_OP(a, b) ((a) * (b))
+#define MLA_OP(a, b, c) ((b) * (c) + (a))
+#define DIV_OP(a, b) ((a) / (b))
+#define EXP_OP(a) exp((a))
+#define LOG_OP(a) log((a))
+#define SQRT_OP(a) sqrt((a))
+#define TANH_OP(a) tanh((a))
+
+// Logistic Activation
+inline TYPE logistic_op(TYPE x)
+{
+    return DIV_OP((TYPE)CONST_ONE, ADD_OP((TYPE)CONST_ONE, EXP_OP(-x)));
+}
+// Hyperbolic Tangent Activation
+inline TYPE tanh_op(TYPE x)
+{
+    return MUL_OP((TYPE)A_VAL, TANH_OP(MUL_OP((TYPE)B_VAL, x)));
+}
+// RELU Tangent Activation
+inline TYPE relu_op(TYPE x)
+{
+    return max((TYPE)0, x);
+}
+// Bounded RELU Activation
+inline TYPE brelu_op(TYPE x)
+{
+    return min((TYPE)A_VAL, max((TYPE)0, x));
+}
+// Lower Upper Bounded RELU Activation
+inline TYPE lu_brelu_op(TYPE x)
+{
+    return min(max(x, (TYPE)B_VAL), (TYPE)A_VAL);
+}
+// Leaky RELU Activation
+inline TYPE lrelu_op(TYPE x)
+{
+    return select(MUL_OP((TYPE)A_VAL, x), x, CONVERT(x > (TYPE)0, SELECT_TYPE));
+}
+// Soft RELU Activation
+inline TYPE srelu_op(TYPE x)
+{
+    return LOG_OP(ADD_OP((TYPE)CONST_ONE, EXP_OP(x)));
+}
+// Absolute Activation
+inline TYPE abs_op(TYPE x)
+{
+    return ABS_OP(x);
+}
+// Square Activation
+inline TYPE square_op(TYPE x)
+{
+    return MUL_OP(x, x);
+}
+// Square-root Activation
+inline TYPE sqrt_op(TYPE x)
+{
+    return SQRT_OP(x);
+}
+// Linear Activation
+inline TYPE linear_op(TYPE x)
+{
+    return MLA_OP((TYPE)B_VAL, (TYPE)A_VAL, x);
+}
+
+#define ACTIVATION_OP2(op, x) op##_op(x)
+#define ACTIVATION_OP(op, x) ACTIVATION_OP2(op, x)
+
+#endif // defined(TYPE) && defined(SELECT_TYPE)
\ No newline at end of file
-- 
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