[GPU] Integer abs support for activation

Author: kelvinchoi-intel

src/plugins/intel_gpu/src/graph/activation.cpp

@@ -26,7 +26,8 @@ layout activation_inst::calc_output_layout(activation_node const& node, kernel_i
         activation_func::negation,
         activation_func::relu,
         activation_func::floor,
-        activation_func::clamp };
+        activation_func::clamp,
+        activation_func::abs };
 
     if (input_node_layout.data_type == data_types::i8 || input_node_layout.data_type == data_types::u8 ||
         input_node_layout.data_type == data_types::i32) {

src/plugins/intel_gpu/src/kernel_selector/kernels/activation/activation_kernel_opt.cpp

@@ -90,6 +90,14 @@ bool ActivationKernelOpt::Validate(const Params& p) const {
         (params.outputs[0].GetLayout() != DataLayout::bfyx && params.outputs[0].GetLayout() != DataLayout::bfzyx))
         return false;
 
+    auto input_dt = params.inputs[0].GetDType();
+    if (input_dt == Datatype::INT8 || input_dt == Datatype::INT32) {
+        for (auto act : params.activations) {
+            if (act.function == ActivationFunction::ABS)
+                return false;
+        }
+    }
+
     return true;
 }
 

src/plugins/intel_gpu/tests/unit/test_cases/activation_simple_gpu_test.cpp

@@ -1579,7 +1579,8 @@ TEST(activation_i32_fw_gpu, basic_yxfb_i32_funcs) {
         activation_func::negation,
         activation_func::relu,
         activation_func::clamp,
-        activation_func::floor
+        activation_func::floor,
+        activation_func::abs
     };
 
     for (auto func : funcs) {
@@ -1620,6 +1621,76 @@ TEST(activation_i32_fw_gpu, basic_yxfb_i32_funcs) {
             case activation_func::floor:
                 ASSERT_EQ((int32_t)std::floor(input_ptr[i]), output_ptr[i]);
                 break;
+            case activation_func::abs:
+                ASSERT_EQ(std::abs(static_cast<int32_t>(input_ptr[i])), output_ptr[i]);
+                break;
+            default:
+                break;
+            }
+        }
+    }
+}
+
+TEST(activation_i32_fw_gpu, basic_yxfb_u8_funcs) {
+    auto& engine = get_test_engine();
+    auto input = engine.allocate_memory({ data_types::u8, format::yxfb,{ 2, 2, 2, 2 } });
+
+    std::vector<uint8_t> input_vec = {
+        1,   0,  5,   1,
+        2,   0,  6,  5,
+        3,   0, 7,  12,
+        4,   0, 8,   8
+    };
+    set_values(input, input_vec);
+
+    // functions valid for uint8 type input
+    std::vector<activation_func> funcs = {
+        activation_func::none,
+        activation_func::negation,
+        activation_func::relu,
+        activation_func::clamp,
+        activation_func::floor,
+        activation_func::abs
+    };
+
+    for (auto func : funcs) {
+        topology topology;
+        activation_additional_params params = {0.0, 1.0};
+        topology.add(input_layout("input", input->get_layout()));
+        topology.add(activation("activation", input_info("input"), func, params));
+
+        network network(engine, topology, get_test_default_config(engine));
+        network.set_input_data("input", input);
+        auto outputs = network.execute();
+
+        ASSERT_EQ(outputs.size(), size_t(1));
+        ASSERT_EQ(outputs.begin()->first, "activation");
+
+        auto output_memory = outputs.at("activation").get_memory();
+        auto output_layout = output_memory->get_layout();
+        cldnn::mem_lock<uint8_t> output_ptr(output_memory, get_test_stream());
+        cldnn::mem_lock<uint8_t> input_ptr(input, get_test_stream());
+
+        for (size_t i = 0; i < output_layout.get_linear_size(); ++i) {
+            switch (func) {
+            case activation_func::none:
+                ASSERT_EQ((uint8_t)input_ptr[i], output_ptr[i]);
+                break;
+            case activation_func::negation:
+                ASSERT_EQ(!((uint8_t)input_ptr[i]), output_ptr[i]);
+                break;
+            case activation_func::relu:
+                ASSERT_EQ((uint8_t)(std::max(static_cast<int32_t>(input_ptr[i]), 0)), output_ptr[i]);
+                break;
+            case activation_func::clamp:
+                ASSERT_EQ(std::min(std::max(input_ptr[i], static_cast<uint8_t>(params.a)), static_cast<uint8_t>(params.b)), output_ptr[i]);
+                break;
+            case activation_func::floor:
+                ASSERT_EQ((uint8_t)std::floor(input_ptr[i]), output_ptr[i]);
+                break;
+            case activation_func::abs:
+                ASSERT_EQ(std::abs(static_cast<uint8_t>(input_ptr[i])), output_ptr[i]);
+                break;
             default:
                 break;
             }