diff --git a/src/04kernel/src/collectors/cast.cc b/src/04kernel/src/collectors/cast.cc
index 9ccfcd13c..bca9d2629 100644
--- a/src/04kernel/src/collectors/cast.cc
+++ b/src/04kernel/src/collectors/cast.cc
@@ -1,4 +1,6 @@
 #include "kernel/collectors/cast.h"
+#include "../kernels/cast/cpu_kernel.hh"
+#include "../kernels/cast/cuda_kernel.hh"
 
 namespace refactor::kernel {
 
@@ -7,11 +9,20 @@ namespace refactor::kernel {
 
     std::vector<KernelBox>
     CastCollector::filter(TensorRefs inputs, TensorRefs outputs) const {
+        auto const &from = inputs[0];
+        auto const &to = outputs[0];
+
         std::vector<KernelBox> ans;
         switch (_target) {
             case decltype(_target)::Cpu:
+                if (auto ptr = CastCpu::build(from, to); ptr) {
+                    ans.emplace_back(std::move(ptr));
+                }
                 break;
             case decltype(_target)::Nvidia:
+                if (auto ptr = CastCuda::build(from, to); ptr) {
+                    ans.emplace_back(std::move(ptr));
+                }
                 break;
             default:
                 UNREACHABLEX(void, "Unknown target");
diff --git a/src/04kernel/src/kernels/cast/cpu_kernel.cc b/src/04kernel/src/kernels/cast/cpu_kernel.cc
new file mode 100644
index 000000000..7e125c861
--- /dev/null
+++ b/src/04kernel/src/kernels/cast/cpu_kernel.cc
@@ -0,0 +1,79 @@
+#include "cpu_kernel.hh"
+#include <execution>
+
+namespace refactor::kernel {
+    using K = CastCpu;
+
+    K::CastCpu(decltype(from) from_,
+               decltype(to) to_,
+               decltype(size) size_) noexcept
+        : from(from_), to(to_), size(size_) {}
+
+    auto K::build(Tensor const &from, Tensor const &to) noexcept -> KernelBox {
+        return std::make_unique<K>(from.dataType, to.dataType, from.elementsSize());
+    }
+    auto K::typeId() noexcept -> size_t {
+        static uint8_t ID = 1;
+        return reinterpret_cast<size_t>(&ID);
+    }
+
+    auto K::kernelTypeId() const noexcept -> size_t {
+        return typeId();
+    }
+    auto K::description() const noexcept -> std::string_view {
+        return "Performing cast operation on generic cpu";
+    }
+
+    template<class T, class U>
+    static auto lowerTyped(size_t size) noexcept -> RoutineWorkspace {
+        using namespace runtime;
+        return [=](Resources &, void *, void const *const *inputs, void *const *outputs) {
+            auto x = reinterpret_cast<T const *>(inputs[0]);
+            auto y = reinterpret_cast<U *>(outputs[0]);
+            std::transform(std::execution::par_unseq,
+                           x, x + size,
+                           y,
+                           [=](auto a) { return static_cast<U>(a); });
+        };
+    }
+
+    auto K::lower(Resources &) const noexcept -> RoutineWorkspace {
+#define CASE_U(T, U)  \
+    case DataType::U: \
+        return lowerTyped<T, primitive<DataType::U>::type>(size)
+
+#define CASE_T(T)                                       \
+    case DataType::T:                                   \
+        switch (to) {                                   \
+            CASE_U(primitive<DataType::T>::type, U8);   \
+            CASE_U(primitive<DataType::T>::type, U16);  \
+            CASE_U(primitive<DataType::T>::type, U32);  \
+            CASE_U(primitive<DataType::T>::type, U64);  \
+            CASE_U(primitive<DataType::T>::type, I8);   \
+            CASE_U(primitive<DataType::T>::type, I16);  \
+            CASE_U(primitive<DataType::T>::type, I32);  \
+            CASE_U(primitive<DataType::T>::type, I64);  \
+            CASE_U(primitive<DataType::T>::type, F32);  \
+            CASE_U(primitive<DataType::T>::type, F64);  \
+            CASE_U(primitive<DataType::T>::type, Bool); \
+            default:                                    \
+                UNREACHABLE();                          \
+        }
+        switch (from) {
+            CASE_T(U8);
+            CASE_T(U16);
+            CASE_T(U32);
+            CASE_T(U64);
+            CASE_T(I8);
+            CASE_T(I16);
+            CASE_T(I32);
+            CASE_T(I64);
+            CASE_T(F32);
+            CASE_T(F64);
+            CASE_T(Bool);
+            default:
+                UNREACHABLE();
+        }
+    }// namespace refactor::kernel
+
+}// namespace refactor::kernel
diff --git a/src/04kernel/src/kernels/cast/cpu_kernel.hh b/src/04kernel/src/kernels/cast/cpu_kernel.hh
new file mode 100644
index 000000000..3f138d572
--- /dev/null
+++ b/src/04kernel/src/kernels/cast/cpu_kernel.hh
@@ -0,0 +1,25 @@
+#ifndef KERNEL_CLIP_CPU_KERNEL_HH
+#define KERNEL_CLIP_CPU_KERNEL_HH
+
+#include "kernel/kernel.h"
+#include "kernel/tensor.h"
+
+namespace refactor::kernel {
+
+    struct CastCpu final : public Kernel {
+        DataType from, to;
+        size_t size;
+
+        CastCpu(decltype(from), decltype(to), decltype(size)) noexcept;
+
+        static KernelBox build(Tensor const &, Tensor const &) noexcept;
+        static size_t typeId() noexcept;
+
+        size_t kernelTypeId() const noexcept final;
+        std::string_view description() const noexcept final;
+        RoutineWorkspace lower(Resources &) const noexcept final;
+    };
+
+}// namespace refactor::kernel
+
+#endif// KERNEL_CLIP_CPU_KERNEL_HH
diff --git a/src/04kernel/src/kernels/cast/cuda_kernel.cc b/src/04kernel/src/kernels/cast/cuda_kernel.cc
new file mode 100644
index 000000000..3de3eb632
--- /dev/null
+++ b/src/04kernel/src/kernels/cast/cuda_kernel.cc
@@ -0,0 +1,36 @@
+#include "cuda_kernel.hh"
+
+#ifdef USE_CUDA
+#include "../../generator/nvrtc_repo.h"
+#include "kernel/cuda/threads_distributer.cuh"
+#include <cuda_runtime.h>
+#endif
+
+namespace refactor::kernel {
+    using K = CastCuda;
+
+    K::CastCuda(decltype(from) from_,
+                decltype(to) to_,
+                decltype(size) size_) noexcept
+        : from(from_), to(to_), size(size_) {}
+
+    auto K::build(Tensor const &from, Tensor const &to) noexcept -> KernelBox {
+#ifndef USE_CUDA
+        return nullptr;
+#endif
+
+        return std::make_unique<K>(from.dataType, to.dataType, from.elementsSize());
+    }
+    auto K::typeId() noexcept -> size_t {
+        static uint8_t ID = 1;
+        return reinterpret_cast<size_t>(&ID);
+    }
+
+    auto K::kernelTypeId() const noexcept -> size_t {
+        return typeId();
+    }
+    auto K::description() const noexcept -> std::string_view {
+        return "Performing cast operation on Nvidia gpu";
+    }
+
+}// namespace refactor::kernel
diff --git a/src/04kernel/src/kernels/cast/cuda_kernel.hh b/src/04kernel/src/kernels/cast/cuda_kernel.hh
new file mode 100644
index 000000000..775893e6e
--- /dev/null
+++ b/src/04kernel/src/kernels/cast/cuda_kernel.hh
@@ -0,0 +1,27 @@
+#ifndef KERNEL_CLIP_CUDA_KERNEL_HH
+#define KERNEL_CLIP_CUDA_KERNEL_HH
+
+#include "kernel/kernel.h"
+#include "kernel/tensor.h"
+
+namespace refactor::kernel {
+
+    struct CastCuda final : public Kernel {
+        DataType from, to;
+        size_t size;
+
+        CastCuda(decltype(from), decltype(to), decltype(size)) noexcept;
+
+        static KernelBox build(Tensor const &, Tensor const &) noexcept;
+        static size_t typeId() noexcept;
+
+        size_t kernelTypeId() const noexcept final;
+        std::string_view description() const noexcept final;
+#ifdef USE_CUDA
+        RoutineWorkspace lower(Resources &) const final;
+#endif
+    };
+
+}// namespace refactor::kernel
+
+#endif// KERNEL_CLIP_CUDA_KERNEL_HH
diff --git a/src/04kernel/src/kernels/clip/cpu_kernel.cc b/src/04kernel/src/kernels/clip/cpu_kernel.cc
index a4e7d36c4..b48735e21 100644
--- a/src/04kernel/src/kernels/clip/cpu_kernel.cc
+++ b/src/04kernel/src/kernels/clip/cpu_kernel.cc
@@ -29,7 +29,7 @@ namespace refactor::kernel {
     template<class T>
     static auto lowerTyped(size_t size, bool hasMax) noexcept -> RoutineWorkspace {
         using namespace runtime;
-        return [=](Resources &, void *workspace, void const *const *inputs, void *const *outputs) {
+        return [=](Resources &, void *, void const *const *inputs, void *const *outputs) {
             auto data = reinterpret_cast<T const *>(inputs[0]);
             auto min = *reinterpret_cast<T const *>(inputs[1]),
                  max = hasMax
diff --git a/src/04kernel/test/kernels/cast/test_cpu.cpp b/src/04kernel/test/kernels/cast/test_cpu.cpp
new file mode 100644
index 000000000..6241ac8d7
--- /dev/null
+++ b/src/04kernel/test/kernels/cast/test_cpu.cpp
@@ -0,0 +1,30 @@
+#include "../../../src/kernels/cast/cpu_kernel.hh"
+#include <gtest/gtest.h>
+#include <numeric>
+
+using namespace refactor;
+using namespace kernel;
+
+TEST(kernel, CastCpu) {
+    // build routine
+    auto x = Tensor::share(DataType::F64, Shape{2, 3, 4, 5});
+    auto y = Tensor::share(DataType::I8, Shape{2, 3, 4, 5});
+    auto kernel = CastCpu::build(*x, *y);
+    ASSERT_TRUE(kernel);
+    auto res = runtime::Resources();
+    auto routine = kernel->lower(res).routine;
+    // put input data
+    std::vector<float> x_(x->elementsSize());
+    std::vector<int8_t> y_(y->elementsSize());
+    std::iota(x_.begin(), x_.end(), 0);
+    // inference
+    {
+        void const *inputs[]{x_.data()};
+        void *outputs[]{y_.data()};
+        routine(res, nullptr, inputs, outputs);
+    }
+    // check
+    for (auto i : range0_(static_cast<int8_t>(y->elementsSize()))) {
+        EXPECT_EQ(y_[i], i);
+    }
+}