diff --git a/h5py/_hl/dataset.py b/h5py/_hl/dataset.py
index 981cbcba..55f08f11 100644
--- a/h5py/_hl/dataset.py
+++ b/h5py/_hl/dataset.py
@@ -789,6 +789,17 @@ class Dataset(HLObject):
             return r.encode('utf8')
         return r
 
+    def __dir__(self):
+        if six.PY3:
+            names = set(super(Dataset, self).__dir__())
+        else:
+            names = set(dir(type(self)))
+        # ds.value is deprecated, and we want to ensure that Jedi doesn't try
+        # to call the property (https://github.com/h5py/h5py/issues/1312), so
+        # this hides it from tab completions.
+        names.discard('value')
+        return sorted(names)
+
     if hasattr(h5d.DatasetID, "refresh"):
         @with_phil
         def refresh(self):
diff --git a/h5py/h5t.pyx b/h5py/h5t.pyx
index 8ddd424b..ba2d5a1b 100644
--- a/h5py/h5t.pyx
+++ b/h5py/h5t.pyx
@@ -1369,27 +1369,25 @@ cdef class TypeEnumID(TypeCompositeID):
 def _get_float_dtype_to_hdf5():
     float_le = {}
     float_be = {}
-    h5_be_list = [IEEE_F16BE, IEEE_F32BE, IEEE_F64BE, IEEE_F128BE,
-                  LDOUBLE_BE]
-    h5_le_list = [IEEE_F16LE, IEEE_F32LE, IEEE_F64LE, IEEE_F128LE]
-    if MACHINE != 'ppc64le':
-        h5_le_list.append(LDOUBLE_LE)
+    h5_be_list = [IEEE_F16BE, IEEE_F32BE, IEEE_F64BE, IEEE_F128BE, LDOUBLE_BE]
+    h5_le_list = [IEEE_F16LE, IEEE_F32LE, IEEE_F64LE, IEEE_F128LE, LDOUBLE_LE]
+
     for ftype_, finfo, size in _available_ftypes:
         nmant, maxexp, minexp = _correct_float_info(ftype_, finfo)
         for h5type in h5_be_list:
             spos, epos, esize, mpos, msize = h5type.get_fields()
             ebias = h5type.get_ebias()
             if (finfo.iexp == esize and nmant == msize and
-                (maxexp - 1) == ebias
-            ):
+                    (maxexp - 1) == ebias):
                 float_be[ftype_] = h5type
+                break # first found matches, related to #1244
         for h5type in h5_le_list:
             spos, epos, esize, mpos, msize = h5type.get_fields()
             ebias = h5type.get_ebias()
             if (finfo.iexp == esize and nmant == msize and
-                (maxexp - 1) == ebias
-            ):
+                    (maxexp - 1) == ebias):
                 float_le[ftype_] = h5type
+                break # first found matches, related to #1244
     if ORDER_NATIVE == H5T_ORDER_LE:
         float_nt = dict(float_le)
     else:
diff --git a/h5py/tests/test_dataset.py b/h5py/tests/test_dataset.py
index b5ba988c..e047b06d 100644
--- a/h5py/tests/test_dataset.py
+++ b/h5py/tests/test_dataset.py
@@ -1186,3 +1186,13 @@ class TestLowOpen(BaseDataset):
         del dset
         dsid = h5py.h5d.open(self.f.id, b'x', dapl)
         self.assertIsInstance(dsid, h5py.h5d.DatasetID)
+
+
+def test_hide_value_from_jedi():
+    from io import BytesIO
+    buf = BytesIO()
+    with h5py.File(buf, 'w') as fout:
+        fout['test'] = [1, 2, 3]
+        with pytest.warns(UserWarning):
+            assert hasattr(fout['test'], 'value')
+        assert 'value' not in dir(fout['test'])