add the sign operator

src/include/migraphx/op/sign.hpp

+#ifndef MIGRAPHX_GUARD_OPERATORS_SIGN_HPP
+#define MIGRAPHX_GUARD_OPERATORS_SIGN_HPP
+
+#include <array>
+#include <migraphx/op/unary.hpp>
+#include <migraphx/operation.hpp>
+#include <migraphx/check_shapes.hpp>
+#include <migraphx/stringutils.hpp>
+#include <migraphx/streamutils.hpp>
+#include <migraphx/literal.hpp>
+#include <migraphx/shape_for_each.hpp>
+#include <migraphx/config.hpp>
+#include <cmath>
+#include <utility>
+
+namespace migraphx {
+inline namespace MIGRAPHX_INLINE_NS {
+namespace op {
+
+struct sign : unary<sign>
+{
+    auto apply() const
+    {
+        return [](auto x) { return (x > 0 ? 1 : ((x < 0) ? -1 : 0)); };
+    }
+};
+
+} // namespace op
+} // namespace MIGRAPHX_INLINE_NS
+} // namespace migraphx
+
+#endif

src/include/migraphx/operators.hpp

@@ -56,6 +56,7 @@
 #include <migraphx/op/rsqrt.hpp>
 #include <migraphx/op/scalar.hpp>
 #include <migraphx/op/sigmoid.hpp>
+#include <migraphx/op/sign.hpp>
 #include <migraphx/op/sinh.hpp>
 #include <migraphx/op/sin.hpp>
 #include <migraphx/op/slice.hpp>

src/targets/gpu/CMakeLists.txt

@@ -45,6 +45,7 @@ add_library(migraphx_device
     device/reduce_mean.cpp
     device/pow.cpp
     device/sqdiff.cpp
+    device/sign.cpp
 )
 set_target_properties(migraphx_device PROPERTIES EXPORT_NAME device)
 rocm_clang_tidy_check(migraphx_device)

src/targets/gpu/device/sign.cpp

+#include <migraphx/gpu/device/sign.hpp>
+#include <migraphx/gpu/device/nary.hpp>
+#include <migraphx/gpu/device/types.hpp>
+
+namespace migraphx {
+inline namespace MIGRAPHX_INLINE_NS {
+namespace gpu {
+namespace device {
+
+void sign(hipStream_t stream, const argument& result, const argument& arg)
+{
+    nary(stream, result, arg)([](auto x) { return (x > 0 ? 1 : ((x < 0) ? -1 : 0)); });
+}
+
+} // namespace device
+} // namespace gpu
+} // namespace MIGRAPHX_INLINE_NS
+} // namespace migraphx

src/targets/gpu/include/migraphx/gpu/device/sign.hpp

+#ifndef MIGRAPHX_GUARD_RTGLIB_DEVICE_SIGN_HPP
+#define MIGRAPHX_GUARD_RTGLIB_DEVICE_SIGN_HPP
+
+#include <migraphx/argument.hpp>
+#include <migraphx/config.hpp>
+#include <hip/hip_runtime_api.h>
+
+namespace migraphx {
+inline namespace MIGRAPHX_INLINE_NS {
+namespace gpu {
+namespace device {
+
+void sign(hipStream_t stream, const argument& result, const argument& arg);
+
+} // namespace device
+} // namespace gpu
+} // namespace MIGRAPHX_INLINE_NS
+} // namespace migraphx
+
+#endif

src/targets/gpu/include/migraphx/gpu/sign.hpp

+#ifndef MIGRAPHX_GUARD_RTGLIB_SIGN_HPP
+#define MIGRAPHX_GUARD_RTGLIB_SIGN_HPP
+
+#include <migraphx/gpu/oper.hpp>
+#include <migraphx/gpu/device/sign.hpp>
+
+namespace migraphx {
+inline namespace MIGRAPHX_INLINE_NS {
+namespace gpu {
+
+struct hip_sign : unary_device<hip_sign, device::sign>
+{
+};
+
+} // namespace gpu
+} // namespace MIGRAPHX_INLINE_NS
+} // namespace migraphx
+
+#endif

src/targets/gpu/lowering.cpp

@@ -31,6 +31,7 @@
 #include <migraphx/gpu/erf.hpp>
 #include <migraphx/gpu/log.hpp>
 #include <migraphx/gpu/sin.hpp>
+#include <migraphx/gpu/sign.hpp>
 #include <migraphx/gpu/cos.hpp>
 #include <migraphx/gpu/tan.hpp>
 #include <migraphx/gpu/sinh.hpp>
@@ -111,6 +112,7 @@ struct miopen_apply
         add_generic_op<hip_rsqrt>("rsqrt");
         add_generic_op<hip_pow>("pow");
         add_generic_op<hip_sqdiff>("sqdiff");
+        add_generic_op<hip_sign>("sign");
 
         add_extend_op<miopen_gemm, op::dot>("dot");
         add_extend_op<miopen_contiguous, op::contiguous>("contiguous");