[Tensorflow][Frontend] Sigmoid is not supported

[solderzzc]

The sigmoid activation is not supported in tensorflow nnvm frontend:

  File "convert_net_1.py", line 47, in <module>
    nnvm_net, nnvm_params = nnvm.frontend.from_tensorflow(graph_def)
  File "/root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/frontend/tensorflow.py", line 787, in from_tensorflow
    sym, params = g.from_tensorflow(graph)
  File "/root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/frontend/tensorflow.py", line 640, in from_tensorflow
    op = self._convert_operator(node.op, inputs, attr)
  File "/root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/frontend/tensorflow.py", line 754, in _convert_operator
    raise NotImplementedError("Operator {} not implemented.".format(op_name))
NotImplementedError: Operator Sigmoid not implemented.

[solderzzc]

I pulled this patch and had another issue, I'm not sure if still relate with Sigmoid op.

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Traceback (most recent call last):
  File "convert_net_1.py", line 52, in <module>
    convert(nnvm_net, nnvm_params, (1, 3, 112, 112) ,'float32','llvm --system-lib -target=aarch64-linux-gnu -mattr=+neon')
  File "convert_net_1.py", line 24, in convert
    dtype=dtype, target_host=target_host)
  File "/root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/compiler/build_module.py", line 294, in build
    graph = graph.apply("GraphFusePartition").apply("GraphFuseCompile")
  File "/root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/graph.py", line 234, in apply
    check_call(_LIB.NNGraphApplyPasses(self.handle, npass, cpass, ctypes.byref(ghandle)))
  File "/root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/_base.py", line 75, in check_call
    raise NNVMError(py_str(_LIB.NNGetLastError()))
nnvm._base.NNVMError: [02:23:46] src/top/nn/nn.cc:612: Check failed: pad_width.ndim() == inputs[0]->shape.size() && pad_width[0].ndim() == 2 Illegal pad_width

Stack trace returned 10 entries:
[bt] (0) /root/.local/lib/python2.7/site-packages/tvm-0.4.0-py2.7-linux-x86_64.egg/tvm/libtvm.so(dmlc::StackTrace[abi:cxx11]()+0x40) [0x7f8b398b4b50]
[bt] (1) /root/.local/lib/python2.7/site-packages/tvm-0.4.0-py2.7-linux-x86_64.egg/tvm/libtvm.so(dmlc::LogMessageFatal::~LogMessageFatal()+0x29) [0x7f8b398b5359]
[bt] (2) /root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/libnnvm_compiler.so(+0xeb11d) [0x7f8b3826611d]
[bt] (3) /root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/libnnvm_compiler.so(+0xeb62f) [0x7f8b3826662f]
[bt] (4) /root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/libnnvm_compiler.so(nnvm::compiler::CompileEngine::GetScheduleArgs(nnvm::Graph, tvm::Array<tvm::Tensor, void> const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, tvm::Array<tvm::Tensor, void>*)+0x1479) [0x7f8b38323069]
[bt] (5) /root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/libnnvm_compiler.so(nnvm::compiler::CompileEngine::DoLower(nnvm::Graph, tvm::Array<tvm::Tensor, void> const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)+0xee) [0x7f8b38324dfe]
[bt] (6) /root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/libnnvm_compiler.so(nnvm::compiler::CompileEngine::Lower(nnvm::Graph, tvm::Array<tvm::Tensor, void> const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)+0x186) [0x7f8b38325c66]
[bt] (7) /root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/libnnvm_compiler.so(nnvm::compiler::GraphLower(nnvm::Graph, tvm::Array<tvm::Tensor, void> const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)+0x5a) [0x7f8b38319a1a]
[bt] (8) /root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/libnnvm_compiler.so(nnvm::compiler::GraphFuseCompile(nnvm::Graph)+0x1061) [0x7f8b3832d3d1]
[bt] (9) /root/.local/lib/python2.7/site-packages/nnvm-0.8.0-py2.7.egg/nnvm/libnnvm_compiler.so(std::_Function_handler<nnvm::Graph (nnvm::Graph), nnvm::Graph (*)(nnvm::Graph)>::_M_invoke(std::_Any_data const&, nnvm::Graph&&)+0xf8) [0x7f8b383165a8]

[solderzzc]

It isn't. Let me close it.