change enable_if to ck namespace

include/ck/utility/amd_wave_read_first_lane.hpp

 // SPDX-License-Identifier: MIT
-// Copyright (c) 2018-2022, Advanced Micro Devices, Inc. All rights reserved.
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
 
 #pragma once
 
@@ -100,7 +100,7 @@ __device__ inline int32_t amd_wave_read_first_lane(int32_t value)
 }
 
 template <typename Object,
-          typename = std::enable_if_t<std::is_class<Object>::value &&
+          typename = ck::enable_if_t<std::is_class<Object>::value &&
                                      std::is_trivially_copyable<Object>::value>>
 __device__ auto amd_wave_read_first_lane(const Object& obj)
 {

include/ck/utility/enable_if.hpp

@@ -2,18 +2,28 @@
 // Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
 
 #pragma once
+
+namespace ck {
 #ifdef __HIPCC_RTC__
-namespace std {
-template <bool B, typename T = void>
+template <bool B, class T = void>
+struct enable_if
+{
+};
+
+template <class T>
+struct enable_if<true, T>
+{
+    using type = T;
+};
+
+template <bool B, class T = void>
 using enable_if_t = typename enable_if<B, T>::type;
-} // namespace std
-#endif
-namespace ck {
 
+#else
 template <bool B, typename T = void>
 using enable_if = std::enable_if<B, T>;
 
 template <bool B, typename T = void>
 using enable_if_t = typename std::enable_if<B, T>::type;
-
+#endif
 } // namespace ck

include/ck/utility/random_gen.hpp

@@ -8,7 +8,7 @@ namespace ck {
 
 // Pseudo random number generator
 // version for fp32
-template <typename T, uint32_t seed_t, std::enable_if_t<std::is_same<float, T>{}, bool> = false>
+template <typename T, uint32_t seed_t, ck::enable_if_t<std::is_same<float, T>{}, bool> = false>
 __host__ __device__ uint32_t prand_generator(index_t id, T val, uint32_t seed = seed_t)
 {
     uint32_t x         = *(reinterpret_cast<uint32_t*>(&val));
@@ -24,7 +24,7 @@ __host__ __device__ uint32_t prand_generator(index_t id, T val, uint32_t seed =
 }
 
 // version for fp16
-template <typename T, uint32_t seed_t, std::enable_if_t<std::is_same<half_t, T>{}, bool> = false>
+template <typename T, uint32_t seed_t, ck::enable_if_t<std::is_same<half_t, T>{}, bool> = false>
 __host__ __device__ uint32_t prand_generator(index_t id, T val, uint32_t seed = seed_t)
 {
     uint16_t x         = *(reinterpret_cast<uint16_t*>(&val));
@@ -41,7 +41,7 @@ __host__ __device__ uint32_t prand_generator(index_t id, T val, uint32_t seed =
 // return 0 if data is not fp16 or fp32
 template <typename T,
           uint32_t seed_t,
-          std::enable_if_t<!(std::is_same<float, T>{} || std::is_same<half_t, T>{}), bool> = false>
+          ck::enable_if_t<!(std::is_same<float, T>{} || std::is_same<half_t, T>{}), bool> = false>
 __host__ __device__ uint32_t prand_generator(int id, T val, uint32_t seed = seed_t)
 {
     ck::ignore = id;