Refactor f8_t, add bf8_t (#792)

* Refactor f8_t to add bf8_t

* Add check_err impl for f8_t

* Update fp8 test

* Format

* Revert the fix

* Update vector_type implementation

* Add bf8 test

* Add bf8, use BitInt types

* Add bf8 conversion methods

* Update type_convert for fp8/bf8

* Add check_err fp8/bf8 support

* Add subnorm fp8 tests

* Add subnorm bf8 tests

* Fix conversion

* Add bf8 cmake bindings

* Add macros to enable build with disabled fp8/bf8

* Remove is_native method

* Update flag combination for mixed precision instances

* Add more flag checks

* Add another flag to a client example

* Add type traits, decouple f8/bf8 casting

* Clean up

* Decouple fp8 and bf8 flags

* Remove more redundant flags

* Remove leftover comments

include/ck/tensor_operation/gpu/warp/xdlops_gemm.hpp

@@ -456,6 +456,7 @@ struct mfma_type<MfmaInstr::mfma_f64_16x16x4f64>
     }
 };
 
+#if defined CK_ENABLE_FP8
 template <>
 struct mfma_type<MfmaInstr::mfma_f32_32x32x16f8f8>
 {
@@ -499,6 +500,7 @@ struct mfma_type<MfmaInstr::mfma_f32_16x16x32f8f8>
         intrin_mfma_f32_16x16x32f8f8<MPerXdlops, NPerXdlops>::Run(a, b, reg_c);
     }
 };
+#endif
 
 template <typename base_type, index_t MPerXdlops, index_t NPerXdlops>
 struct MfmaSelector
@@ -640,6 +642,7 @@ struct MfmaSelector
     }
 #endif
 
+#if defined CK_ENABLE_FP8
     template <>
     static constexpr auto GetMfma<f8_t, 32, 32>()
     {
@@ -651,6 +654,7 @@ struct MfmaSelector
     {
         return MfmaInstr::mfma_f32_16x16x32f8f8;
     }
+#endif
 
     static constexpr auto selected_mfma = mfma_type<GetMfma<base_type, MPerXdlops, NPerXdlops>()>{};
 
@@ -852,7 +856,11 @@ struct XdlopsGemm
     {
         static_assert(is_same<base_type, double>::value || is_same<base_type, float>::value ||
                           is_same<base_type, half_t>::value || is_same<base_type, bhalf_t>::value ||
-                          is_same<base_type, int8_t>::value || is_same<base_type, f8_t>::value,
+                          is_same<base_type, int8_t>::value
+#if defined CK_ENABLE_FP8
+                          || is_same<base_type, f8_t>::value
+#endif
+                      ,
                       "base base_type must be double, float, half, bfloat16, and int8_t!");
 
         static_for<0, KPack / mfma_instr.k_per_blk, 1>{}([&](auto k) {