Adding support for Acos (#110)

* Adding support for Acos

* Float64 not supported, changed to Float32

src/load.jl

@@ -59,6 +59,9 @@ function load_node!(tape::Tape, ::OpConfig{:ONNX, :Abs}, args::VarVec, attrs::At
     return push_call!(tape, _abs, args[1])
 end
 
+function load_node!(tape::Tape, ::OpConfig{:ONNX, :Acos}, args::VarVec, attrs::AttrDict)
+    return push_call!(tape, _acos, args[1])
+end
 
 function load_node!(tape::Tape, nd::NodeProto, backend::Symbol)
     args = [tape.c.name2var[name] for name in nd.input]

src/ops.jl

@@ -50,6 +50,7 @@ sub(xs...) = .-(xs...)
 _sin(x) = sin.(x)
 _cos(x) = cos.(x)
 _abs(x) = abs.(x)
+_acos(x) = acos.(x)
 mul(xs...) = .*(xs...)
 relu(x) = NNlib.relu.(x)
 leakyrelu(x;a = 0.01) = NNlib.leakyrelu.(x,a)

src/save.jl

@@ -126,6 +126,11 @@ function save_node!(g::GraphProto, ::OpConfig{:ONNX, typeof(_abs)}, op::Umlaut.C
     push!(g.node, nd)
 end
 
+function save_node!(g::GraphProto, ::OpConfig{:ONNX, typeof(_acos)}, op::Umlaut.Call)
+    nd = NodeProto("Acos", 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

@@ -36,6 +36,12 @@ import ONNX: NodeProto, ValueInfoProto, AttributeProto, onnx_name
         ort_test(ONNX._abs, A)
     end
 
+    @testset "Acos" begin
+        # ONNXRunTime has no implementation for Acos(x::Float64), using Float32 
+        A = rand(Float32, 3, 4)
+        ort_test(ONNX._acos, A)
+    end
+
     @testset "Gemm" begin
         A, B, C = (rand(3, 4), rand(3, 4), rand(3, 3))
         ort_test(ONNX.onnx_gemm, A, B')