[incubator-tvm] branch v0.6 updated: [BACKPORT-0.6][NODE][Serialization]fix serialization precision loss in float (#5860)

[liuyizhi]

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liuyizhi pushed a commit to branch v0.6
in repository https://gitbox.apache.org/repos/asf/incubator-tvm.git


The following commit(s) were added to refs/heads/v0.6 by this push:
     new 4d16474  [BACKPORT-0.6][NODE][Serialization]fix serialization 
precision loss in float (#5860)
4d16474 is described below

commit 4d164740c581b3e10c95a32e1d86d20cef14f582
Author: Yizhi Liu <liuyi...@apache.org>
AuthorDate: Sat Jun 20 17:02:02 2020 -0700

    [BACKPORT-0.6][NODE][Serialization]fix serialization precision loss in 
float (#5860)
    
    Co-authored-by: LaiyuanGong <30686426+hisif...@users.noreply.github.com>
    
    Co-authored-by: LaiyuanGong <30686426+hisif...@users.noreply.github.com>
---
 src/node/serialization.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/node/serialization.cc b/src/node/serialization.cc
index d270e72..cb310eb 100644
--- a/src/node/serialization.cc
+++ b/src/node/serialization.cc
@@ -167,7 +167,11 @@ class JSONAttrGetter : public AttrVisitor {
   ReflectionVTable* reflection_ = ReflectionVTable::Global();
 
   void Visit(const char* key, double* value) final {
-    node_->attrs[key] = std::to_string(*value);
+    std::ostringstream s;
+    // Type <double> have approximately 16 decimal digits
+    s.precision(16);
+    s << (*value);
+    node_->attrs[key] = s.str();
   }
   void Visit(const char* key, int64_t* value) final {
     node_->attrs[key] = std::to_string(*value);