workaround with float (#992)

Co-authored-by: Jing Zhang <jizha@amd.com>

include/ck/utility/type_convert.hpp

@@ -146,7 +146,7 @@ inline __host__ __device__ f8_t type_convert<f8_t, half_t>(half_t x)
 #if defined(__gfx940__) || defined(__gfx941__) || defined(__gfx942__)
     // convert to float and use native converion
     return type_convert<f8_t>(type_convert<float>(x));
-#else
+#elif 0
     constexpr bool negative_zero_nan = true;
     constexpr bool clip              = true;
     constexpr f8_rounding_mode rm    = f8_rounding_mode::standard;
@@ -154,6 +154,8 @@ inline __host__ __device__ f8_t type_convert<f8_t, half_t>(half_t x)
     return utils::
         cast_to_f8<half_t, f8_t, negative_zero_nan, clip, (rm == f8_rounding_mode::stochastic)>(
             x, rng);
+#else
+    return type_convert<f8_t>(type_convert<float>(x));
 #endif
 }
 
@@ -164,9 +166,11 @@ inline __host__ __device__ half_t type_convert<half_t, f8_t>(f8_t x)
 #if defined(__gfx940__) || defined(__gfx941__) || defined(__gfx942__)
     // use native conversion to float and convert to fp16
     return type_convert<half_t>(type_convert<float>(x));
-#else
+#elif 0
     constexpr bool negative_zero_nan = true;
     return utils::cast_from_f8<f8_t, half_t, negative_zero_nan>(x);
+#else
+    return type_convert<half_t>(type_convert<float>(x));
 #endif
 }
 #endif
@@ -222,7 +226,7 @@ inline __host__ __device__ bf8_t type_convert<bf8_t, half_t>(half_t x)
 #if defined(__gfx940__) || defined(__gfx941__) || defined(__gfx942__)
     // convert to float and use native converion
     return type_convert<bf8_t>(type_convert<float>(x));
-#else
+#elif 0
     constexpr bool negative_zero_nan = true;
     constexpr bool clip              = true;
     constexpr f8_rounding_mode rm    = f8_rounding_mode::standard;
@@ -230,6 +234,8 @@ inline __host__ __device__ bf8_t type_convert<bf8_t, half_t>(half_t x)
     return utils::
         cast_to_f8<half_t, bf8_t, negative_zero_nan, clip, (rm == f8_rounding_mode::stochastic)>(
             x, rng);
+#else
+    return type_convert<bf8_t>(type_convert<float>(x));
 #endif
 }
 
@@ -240,9 +246,11 @@ inline __host__ __device__ half_t type_convert<half_t, bf8_t>(bf8_t x)
 #if defined(__gfx940__) || defined(__gfx941__) || defined(__gfx942__)
     // use native conversion to float and convert to fp16
     return type_convert<half_t>(type_convert<float>(x));
-#else
+#elif 0
     constexpr bool negative_zero_nan = true;
     return utils::cast_from_f8<bf8_t, half_t, negative_zero_nan>(x);
+#else
+    return type_convert<half_t>(type_convert<float>(x));
 #endif
 }
 #endif
@@ -354,7 +362,7 @@ inline __host__ __device__ f8_t f8_convert_sr<f8_t, half_t>(half_t x)
         cast_to_f8<half_t, f8_t, negative_zero_nan, clip, (rm == f8_rounding_mode::stochastic)>(
             x, rng);
 #else
-    return type_convert<f8_t>(type_convert<float>(x));
+    return f8_convert_sr<f8_t>(type_convert<float>(x));
 #endif
 }
 #endif
@@ -406,7 +414,7 @@ inline __host__ __device__ bf8_t f8_convert_sr<bf8_t, half_t>(half_t x)
         cast_to_f8<half_t, bf8_t, negative_zero_nan, clip, (rm == f8_rounding_mode::stochastic)>(
             x, rng);
 #else
-    return type_convert<bf8_t>(type_convert<float>(x));
+    return f8_convert_sr<bf8_t>(type_convert<float>(x));
 #endif
 }
 #endif