remove convert from lowering

src/targets/gpu/lowering.cpp

@@ -220,44 +220,12 @@ struct miopen_apply
         return mod->insert_instruction(ins, make_op("allocate", {{"shape", to_value(s)}}));
     }
 
-    instruction_ref convert_fp8_to_fp32(instruction_ref ins)
-    {
-        std::vector<instruction_ref> fp8_inputs = ins->inputs();
-        std::vector<instruction_ref> fp32_inputs;
-        for(const auto& i : fp8_inputs)
-        {
-            fp32_inputs.push_back(mod->insert_instruction(
-                ins,
-                migraphx::make_op(
-                    "convert",
-                    {{"target_type", migraphx::to_value(migraphx::shape::type_t::float_type)}}),
-                i));
-        }
-        auto fp32_ins = mod->insert_instruction(ins, ins->get_operator(), {fp32_inputs});
-        auto fp8_ins  = mod->insert_instruction(
-            ins,
-            migraphx::make_op(
-                "convert",
-                {{"target_type", migraphx::to_value(migraphx::shape::type_t::fp8e4m3fnuz_type)}}),
-            fp32_ins);
-        mod->replace_instruction(ins, fp8_ins);
-        return fp32_ins;
-    }
-
     template <typename Op>
     void add_gemm_op(const std::string& name)
     {
         apply_map.emplace(name, [=](instruction_ref ins) {
             std::vector<instruction_ref> refs = ins->inputs();
             assert(refs.size() == 2);
-            if(not rocblas_fp8_available() and
-               std::any_of(refs.begin(), refs.end(), [](const auto i) {
-                   return i->get_shape().type() == migraphx::shape::fp8e4m3fnuz_type;
-               }))
-            {
-                // replace fp8 ins with fp32 ins
-                ins = convert_fp8_to_fp32(ins);
-            }
             auto output = insert_allocation(ins, ins->get_shape());
             refs.push_back(output);
             return mod->replace_instruction(ins, rocblas_gemm<Op>{Op{}, 1, 0, compute_fp32}, refs);