1 files changed, 119 insertions, 0 deletions
diff --git a/src/core/GLES_COMPUTE/cs_shaders/activation_layer_helpers_cs.h b/src/core/GLES_COMPUTE/cs_shaders/activation_layer_helpers_cs.h
new file mode 100644
index 0000000000..f43a33fe87
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+++ b/src/core/GLES_COMPUTE/cs_shaders/activation_layer_helpers_cs.h
@@ -0,0 +1,119 @@
+/*
+ * 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.
+ */
+#ifdef DATA_TYPE_FP32
+precision highp float;
+#elif defined(DATA_TYPE_FP16)
+#if defined(LOGISTIC) || defined(TANH) || defined(SRELU) || defined(SQRT)
+precision highp float;
+#else  /*LOGISTIC_TANH_SRELU_SQRT*/
+precision mediump float;
+#endif /*LOGISTIC_TANH_SRELU_SQRT*/
+#endif /*DATA_TYPE_FP32*/
+
+#define ABS_OP(a) abs((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 CONST_ONE (1.f)
+
+// Logistic Activation
+float logistic_op(float x)
+{
+    return DIV_OP(CONST_ONE, ADD_OP(CONST_ONE, EXP_OP(-x)));
+}
+vec4 logistic_op(vec4 x)
+{
+    return DIV_OP(vec4(CONST_ONE), ADD_OP(CONST_ONE, EXP_OP(-x)));
+}
+// Hyperbolic Tangent Activation
+float tanh_op(float x)
+{
+    float tmp = float(B_VAL) * x;
+    if(tmp > 10.f)
+    {
+        return MUL_OP(float(A_VAL), 1.f);
+    }
+    else if(tmp < -10.f)
+    {
+        return MUL_OP(float(A_VAL), -1.f);
+    }
+    else
+    {
+        return MUL_OP(float(A_VAL), tanh(tmp + 0.000001f));
+    }
+}
+// RELU Tangent Activation
+float relu_op(float x)
+{
+    return max(0.f, x);
+}
+vec4 relu_op(vec4 x)
+{
+    return max(vec4(0.f), x);
+}
+// Bounded RELU Activation
+float brelu_op(float x)
+{
+    return min(float(A_VAL), max(float(0.0), x));
+}
+// Lower Upper Bounded RELU Activation
+float lu_brelu_op(float x)
+{
+    return min(max(x, float(B_VAL)), float(A_VAL));
+}
+// Leaky RELU Activation
+float lrelu_op(float x)
+{
+    return (x > float(0.0)) ? x : MUL_OP(float(A_VAL), x);
+}
+// Soft RELU Activation
+float srelu_op(float x)
+{
+    return LOG_OP(ADD_OP(CONST_ONE, EXP_OP(x)));
+}
+// Absolute Activation
+float abs_op(float x)
+{
+    return ABS_OP(x);
+}
+// Square Activation
+float square_op(float x)
+{
+    return MUL_OP(x, x);
+}
+// Square-root Activation
+float sqrt_op(float x)
+{
+    return SQRT_OP(x);
+}
+// Linear Activation
+float linear_op(float x)
+{
+    return MLA_OP(float(B_VAL), float(A_VAL), x);
+}