unary scalar input processing (#912)

* unary scalar input processing

* remove an unnecessary change

* remove unnecessary blank line

src/include/migraphx/op/unary.hpp

@@ -41,7 +41,11 @@ struct unary : op_name<Derived>
     {
         check_shapes{inputs, static_cast<const Derived&>(*this)}.has(1);
         auto s = inputs.at(0);
-        if(s.broadcasted())
+        if(s.scalar())
+        {
+            return s;
+        }
+        else if(s.broadcasted())
         {
             return {s.type(), s.lens()};
         }

test/op_shape_test.cpp

@@ -1583,4 +1583,13 @@ TEST_CASE(step_test)
     }
 }
 
+TEST_CASE(unary_scalar_input)
+{
+    migraphx::shape ss{migraphx::shape::half_type};
+    expect_shape(ss, migraphx::make_op("sin"), ss);
+
+    migraphx::shape s{migraphx::shape::float_type, {1}};
+    expect_shape(s, migraphx::make_op("sin"), s);
+}
+
 int main(int argc, const char* argv[]) { test::run(argc, argv); }