commit d304e80112e5d246b4bb884d1211eef9381bf034
author Michele Di Giorgio <michele.digiorgio@arm.com> Fri Jul 06 10:17:33 2018 +0100
committer Anthony Barbier <anthony.barbier@arm.com> Fri Nov 02 16:54:10 2018 +0000
tree 456943f81602b2df7ae9909d51a942dc3f15cc97
parent d93991e290618a685b67506c78090350e6aee43f

COMPMID-1349: Add support for QASYMM8 LOGISTIC activation in CLActivationLayer

Change-Id: Ibabce61cf5427de80078a6468023bed05f5e7c2c
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/139006
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>

src/core/CL/cl_kernels/activation_layer_qa8.cl

diff --git a/src/core/CL/cl_kernels/activation_layer_qa8.cl b/src/core/CL/cl_kernels/activation_layer_qa8.cl
index 66e54ed..8f6a807 100644
--- a/src/core/CL/cl_kernels/activation_layer_qa8.cl
+++ b/src/core/CL/cl_kernels/activation_layer_qa8.cl
@@ -24,7 +24,18 @@
 #include "helpers.h"
 
 #define TYPE VEC_DATA_TYPE(DATA_TYPE, VEC_SIZE)
+#define VEC_FLOAT VEC_DATA_TYPE(float, VEC_SIZE)
 
+// Logistic Activation
+inline TYPE logistic_op(TYPE x)
+{
+    VEC_FLOAT x_flt = CONVERT(x, VEC_FLOAT);
+    x_flt           = round(x_flt - (float)O1_VAL) * ((float)S1_VAL);
+    x_flt           = 1.f / (1.f + exp(-x_flt));
+
+    const TYPE x_u8 = CONVERT_SAT(round(x_flt / ((float)S1_VAL)) + (float)O1_VAL, TYPE);
+    return x_u8;
+}
 // RELU Activation
 inline TYPE relu_op(TYPE x)
 {
@@ -119,4 +130,4 @@
     (data, 0, (__global DATA_TYPE *)output.ptr);
 }
 
-#endif /* defined(ACT) */
\ No newline at end of file
+#endif /* defined(ACT) */