fix float compare bug

mindspore/lite/src/common/utils.h

@@ -21,6 +21,8 @@
 #include <cstdint>
 #include <vector>
 #include <set>
+#include <limits>
+#include <cmath>
 #include <string>
 #include <utility>
 #include "src/common/log_adapter.h"
@@ -241,6 +243,10 @@ inline size_t DataTypeSize(TypeId type) {
   }
 }
 
+inline bool FloatCompare(const float &a, const float &b = 0.0f) {
+  return std::fabs(a - b) <= std::numeric_limits<float>::epsilon();
+}
+
 }  // namespace lite
 }  // namespace mindspore
 

mindspore/lite/tools/converter/parser/caffe/caffe_activation_parser.cc

@@ -18,6 +18,7 @@
 #include <memory>
 #include "ops/fusion/activation.h"
 #include "nnacl/op_base.h"
+#include "src/common/utils.h"
 
 namespace mindspore {
 namespace lite {
@@ -30,7 +31,7 @@ PrimitiveCPtr CaffeReluParser::Parse(const caffe::LayerParameter &proto, const c
 
   if (proto.has_relu_param() && proto.relu_param().has_negative_slope()) {
     float negative_slope = proto.relu_param().negative_slope();
-    if (negative_slope != 0) {
+    if (!FloatCompare(negative_slope)) {
       prim->set_activation_type(mindspore::ActivationType::LEAKY_RELU);
       prim->set_alpha(negative_slope);
     }

mindspore/lite/tools/converter/parser/onnx/onnx_matmul_parser.cc

@@ -18,6 +18,7 @@
 #include <memory>
 #include "ops/fusion/mat_mul_fusion.h"
 #include "nnacl/op_base.h"
+#include "src/common/utils.h"
 
 namespace mindspore {
 namespace lite {
@@ -38,7 +39,8 @@ PrimitiveCPtr OnnxMatmulParser::Parse(const onnx::GraphProto &onnx_graph, const
       beta = onnx_node_attr.f();
     }
   }
-  if (alpha != 1 || (beta != 1 && !(onnx_node.input().size() == 2 && beta == 0))) {  // 2 : input num is A and B
+  if (!FloatCompare(alpha, 1.0f) || (!FloatCompare(beta, 1.0f) && !(onnx_node.input().size() == 2 &&
+                                                                    !FloatCompare(beta)))) {  // 2: input num is A and B
     MS_LOG(ERROR) << "not support alpha * A * B + beta * C";
     return nullptr;
   }

mindspore/lite/tools/optimizer/fusion/conv_pad_fusion.cc

@@ -26,6 +26,7 @@
 #include "nnacl/op_base.h"
 #include "ops/primitive_c.h"
 #include "ops/op_utils.h"
+#include "src/common/utils.h"
 
 namespace mindspore {
 namespace opt {
@@ -174,7 +175,7 @@ bool IsPrimitiveProper(const CNodePtr &pad_cnode) {
     }
     pad_value = *static_cast<float *>(data_info.data_ptr_);
   }
-  if (pad_value != 0) {
+  if (!mindspore::lite::FloatCompare(pad_value)) {
     return false;
   }