Adding support for Neg (#119)

* Adding support for Neg

* Cleaning up Neg

Author: dstarkenburg

src/load.jl

@@ -91,6 +91,10 @@ function load_node!(tape::Tape, ::OpConfig{:ONNX, :Equal}, args::VarVec, attrs::
     return push_call!(tape, _equal, args...)
 end
 
+function load_node!(tape::Tape, ::OpConfig{:ONNX, :Neg}, args::VarVec, attrs::AttrDict)
+    return push_call!(tape, neg, args[1])
+end
+
 function load_node!(tape::Tape, nd::NodeProto, backend::Symbol)
     args = [tape.c.name2var[name] for name in nd.input]
     attrs = convert(Dict{Symbol, Any}, Dict(nd.attribute))

src/ops.jl

@@ -78,6 +78,7 @@ end
 
 add(xs...) = .+(xs...)
 sub(xs...) = .-(xs...)
+neg(x) = .-(x)
 _sin(x) = sin.(x)
 _cos(x) = cos.(x)
 _abs(x) = abs.(x)

src/save.jl

@@ -166,6 +166,11 @@ function save_node!(g::GraphProto, ::OpConfig{:ONNX, typeof(_equal)}, op::Umlaut
     push!(g.node, nd)
 end
 
+function save_node!(g::GraphProto, ::OpConfig{:ONNX, typeof(neg)}, op::Umlaut.Call)
+    nd = NodeProto("Neg", op)
+    push!(g.node, nd)
+end
+
 function save_node!(g::GraphProto, ::OpConfig{:ONNX, typeof(*)}, op::Umlaut.Call)
     nd = NodeProto(
         input=[onnx_name(v) for v in reverse(op.args)],

test/saveload.jl

@@ -126,6 +126,11 @@ import ONNX: NodeProto, ValueInfoProto, AttributeProto, onnx_name
         ort_test(ONNX._equal, A, B)
     end
 
+    @testset "Neg" begin
+        A = rand(3, 4)
+        ort_test(ONNX.neg, A)
+    end
+
     @testset "Gemm" begin
         A, B, C = (rand(3, 4), rand(3, 4), rand(3, 3))
         ort_test(ONNX.onnx_gemm, A, B')