GNA MTL mixed precision (#13166)

* [GNA] Enable int8 weights for convolutions

* [GNA] Implement convolution low precision tests for MTL

Co-authored-by: Marcin Kacprzak <marcin.kacprzak@intel.com>

src/plugins/intel_gna/src/backend/make_pwl.cpp

@@ -13,7 +13,7 @@
 #include "gna_slope_scale.h"
 #include "dnn_types.h"
 #include "backend/gna_types.h"
-#include "round_float_define.hpp"
+#include "common/numerical_utils.hpp"
 #include "pwl_input_params.hpp"
 #include "pwl_segments_creator_factory.hpp"
 #include "log/log.hpp"

src/plugins/intel_gna/src/backend/pwl_border_values_counter_identity.cpp

@@ -7,7 +7,7 @@
 
 #include "log/debug.hpp"
 #include "pwl_input_params.hpp"
-#include "round_float_define.hpp"
+#include "common/numerical_utils.hpp"
 
 namespace ov {
 namespace intel_gna {

src/plugins/intel_gna/src/backend/pwl_tools.cpp

@@ -5,7 +5,7 @@
 #include "pwl_tools.hpp"
 
 #include "gna_slope_scale.h"
-#include "round_float_define.hpp"
+#include "common/numerical_utils.hpp"
 #include "runtime/pwl.h"
 
 namespace ov {

src/plugins/intel_gna/src/common/numerical_utils.hpp

@@ -0,0 +1,31 @@
+// Copyright (C) 2022 Intel Corporation
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#pragma once
+
+#include <cstdlib>
+#include <algorithm>
+
+namespace ov {
+namespace intel_gna {
+namespace common {
+
+#define FLOAT_TO_INT8(a) static_cast<int8_t>(((a) < 0)?((a) - 0.5f):((a) + 0.5f))
+#define FLOAT_TO_INT16(a) static_cast<int16_t>(((a) < 0)?((a) - 0.5f):((a) + 0.5f))
+#define FLOAT_TO_INT32(a) static_cast<int32_t>(((a) < 0)?((a)-0.5f):((a)+0.5f))
+#define FLOAT_TO_INT64(a) static_cast<int64_t>(((a) < 0)?((a)-0.5f):((a)+0.5f))
+
+/**
+ * @brief Compares two float values and returns if they are equal
+ * @param p1 First float value
+ * @param p2 Second float value
+ * @return Returns true if two float values are equal
+ */
+inline bool fp32eq(float p1, float p2, float accuracy = 0.00001f) {
+    return (std::abs(p1 - p2) <= accuracy * std::min(std::abs(p1), std::abs(p2)));
+}
+
+} // namespace common
+} // namespace intel_gna
+} // namespace ov