fixes

example/ck_tile/03_gemm/universal_gemm.cpp

@@ -330,6 +330,7 @@ int run_gemm_example(int argc, char* argv[])
         {
             return run_gemm_example_with_layouts<ck_tile::bf8_t>(argc, argv, Row{}, Col{}, Row{});
         }
+#if(CK_TILE_PIPELINE_DEFAULT == CK_TILE_PIPELINE_COMPUTE_V3)
         else if(data_type == "pk_int4_t")
         {
             // TODO: Add support for bhalf_t ADataType
@@ -337,6 +338,7 @@ int run_gemm_example(int argc, char* argv[])
                                                  ck_tile::pk_int4_t,
                                                  ck_tile::half_t>(argc, argv, Row{}, Col{}, Row{});
         }
+#endif
         else
         {
             throw std::runtime_error("Unsupported data_type!");
@@ -360,6 +362,7 @@ int run_gemm_example(int argc, char* argv[])
         {
             return run_gemm_example_with_layouts<ck_tile::bf8_t>(argc, argv, Col{}, Col{}, Row{});
         }
+#if(CK_TILE_PIPELINE_DEFAULT == CK_TILE_PIPELINE_COMPUTE_V3)
         else if(data_type == "pk_int4_t")
         {
             // TODO: Add support for bhalf_t ADataType
@@ -367,6 +370,7 @@ int run_gemm_example(int argc, char* argv[])
                                                  ck_tile::pk_int4_t,
                                                  ck_tile::half_t>(argc, argv, Col{}, Col{}, Row{});
         }
+#endif
         else
         {
             throw std::runtime_error("Unsupported data_type!");

include/ck_tile/ops/gemm/pipeline/gemm_pipeline_ag_bg_cr_comp_v4.hpp

@@ -60,6 +60,8 @@ struct GemmPipelineAgBgCrCompV4 : public BaseGemmPipelineAgBgCrCompV4<Problem>
     using CDataType      = remove_cvref_t<typename Problem::CDataType>;
     using BlockGemmShape = remove_cvref_t<typename Problem::BlockGemmShape>;
 
+    static_assert(!std::is_same_v<BDataType, pk_int4_t>, "Not implemented");
+
     static constexpr index_t APackedSize =
         ck_tile::numeric_traits<remove_cvref_t<ADataType>>::PackedSize;
     static constexpr index_t BPackedSize =

include/ck_tile/ops/gemm/pipeline/gemm_pipeline_ag_bg_cr_mem.hpp

@@ -21,6 +21,8 @@ struct BaseGemmPipelineAgBgCrMem
     using BDataType      = remove_cvref_t<typename Problem::BDataType>;
     using BlockGemmShape = remove_cvref_t<typename Problem::BlockGemmShape>;
 
+    static_assert(!std::is_same_v<BDataType, pk_int4_t>, "Not implemented");
+
     static constexpr index_t APackedSize =
         ck_tile::numeric_traits<remove_cvref_t<ADataType>>::PackedSize;
     static constexpr index_t BPackedSize =