COMPMID-2194: Refactor activation function macro in OpenCL. New Macros for activation.

This commit contains the new macros for activation. Only the
activation_layer utilizes the new macros in this commit.

Change-Id: I2fa8567cc876e8cb67a1e876652bc348b7ed23ea
Signed-off-by: Usama Arif <usama.arif@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1104
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/src/core/CL/cl_kernels/activation_float_helpers.h b/src/core/CL/cl_kernels/activation_float_helpers.h
new file mode 100644
index 0000000000..fefbcab5df
--- /dev/null
+++ b/src/core/CL/cl_kernels/activation_float_helpers.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2019 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 GPU_ARCH == GPU_ARCH_BIFROST
+#define MLA(a, b, c) (fma(c, b, a))
+#else // GPU_ARCH == GPU_ARCH_BIFROST
+#define MLA(a, b, c) ((b) * (c) + (a))
+#endif // GPU_ARCH == GPU_ARCH_BIFROST
+// Logistic Activation
+#define logistic_op(DATA_TYPE, x, A_VAL, B_VAL) ((DATA_TYPE)1.0 / ((DATA_TYPE)1.0 + exp(-x)))
+
+// Hyperbolic Tangent Activation
+#define tanh_op(DATA_TYPE, x, A_VAL, B_VAL) ((DATA_TYPE)A_VAL * tanh((DATA_TYPE)B_VAL * x))
+
+// RELU Tangent Activation
+#define relu_op(DATA_TYPE, x, A_VAL, B_VAL) (max((DATA_TYPE)0.0, x))
+
+// Bounded RELU Activation
+#define brelu_op(DATA_TYPE, x, A_VAL, B_VAL) (min((DATA_TYPE)A_VAL, max((DATA_TYPE)0.0, x)))
+
+// Lower Upper Bounded RELU Activation
+#define lu_brelu_op(DATA_TYPE, x, A_VAL, B_VAL) (min(max(x, (DATA_TYPE)B_VAL), (DATA_TYPE)A_VAL))
+
+// Leaky RELU Activation
+#define lrelu_op(DATA_TYPE, x, A_VAL, B_VAL) ((min(x, (DATA_TYPE)0.0) * (DATA_TYPE)A_VAL) + max(x, (DATA_TYPE)0.0))
+
+// Soft RELU Activation
+#define srelu_op(DATA_TYPE, x, A_VAL, B_VAL) (log((DATA_TYPE)1.0 + exp(x)))
+
+// Absolute Activation
+#define abs_op(DATA_TYPE, x, A_VAL, B_VAL) (fabs(x))
+
+// Square Activation
+#define square_op(DATA_TYPE, x, A_VAL, B_VAL) (x * x)
+
+// Square-root Activation
+#define sqrt_op(DATA_TYPE, x, A_VAL, B_VAL) (sqrt(x))
+
+// Linear Activation
+#define linear_op(DATA_TYPE, x, A_VAL, B_VAL) (MLA((DATA_TYPE)B_VAL, (DATA_TYPE)A_VAL, x))
+
+// Identity Activation
+#define _op(DATA_TYPE, x, A_VAL, B_VAL) (x)
+
+#define OP(op, DATA_TYPE, x, A_VAL, B_VAL) op##_op(x, DATA_TYPE, A_VAL, B_VAL)
+
+#define ACTIVATION(op, DATA_TYPE, x, A_VAL, B_VAL) OP(op, x, DATA_TYPE, A_VAL, B_VAL)