feat(dnn/cuda): add a cutlass impl for fusing convolution and dimshuffle

GitOrigin-RevId: 3fc6faef01202867f54206367d32ab01659326d0

dnn/src/cuda/conv_bias/cutlass_convolution_wrapper.cu

@@ -275,4 +275,130 @@ INST(true);
 INST(false);
 #undef INST
 
+#if MEGDNN_TEGRA_X1
+template <bool NeedLoadFromConstMem>
+void megdnn::cuda::cutlass_wrapper::
+        do_conv_bias_int8_implicit_gemm_dp4a_ncdiv4hw4_nchw(
+                const int8_t* /* d_src */, const int8_t* /* d_filter */,
+                const float* /* d_bias */, const float* /* d_z */,
+                float* /* d_dst */, int* /* workspace */,
+                const convolution::ConvParam& /* param */,
+                uint32_t /* nonlinear_mode */, float /* alpha */,
+                float /* beta */, float /* gamma */, float /* scale */,
+                const GemmCoord& /* threadblock_shape */,
+                const GemmCoord& /* warp_shape */, cudaStream_t /* stream */) {}
+#else
+template <bool NeedLoadFromConstMem>
+void megdnn::cuda::cutlass_wrapper::
+        do_conv_bias_int8_implicit_gemm_dp4a_ncdiv4hw4_nchw(
+                const int8_t* d_src, const int8_t* d_filter,
+                const float* d_bias, const float* d_z, float* d_dst,
+                int* workspace, const convolution::ConvParam& param,
+                uint32_t nonlinear_mode, float alpha, float beta, float gamma,
+                float scale, const GemmCoord& threadblock_shape,
+                const GemmCoord& warp_shape, cudaStream_t stream) {
+#define DISPATCH_KERNEL_WITH_TILE_SHAPE(threadblock_m_, threadblock_n_,        \
+                                        threadblock_k_, warp_m_, warp_n_,      \
+                                        warp_k_, aligned_)                     \
+    if (threadblock_shape.m() == threadblock_m_ &&                             \
+        threadblock_shape.n() == threadblock_n_ &&                             \
+        threadblock_shape.k() == threadblock_k_ &&                             \
+        warp_shape.m() == warp_m_ && warp_shape.n() == warp_n_ &&              \
+        warp_shape.k() == warp_k_) {                                           \
+        using ThreadBlockShape =                                               \
+                cutlass::gemm::GemmShape<threadblock_m_, threadblock_n_,       \
+                                         threadblock_k_>;                      \
+        using WarpShape = cutlass::gemm::GemmShape<warp_m_, warp_n_, warp_k_>; \
+        using InstructionShape = cutlass::gemm::GemmShape<1, 1, 4>;            \
+        using Convolution = cutlass::convolution::device::Convolution<         \
+                int8_t, cutlass::layout::TensorNCxHWx<4>, int8_t,              \
+                cutlass::layout::TensorCxRSKx<4>, ElementOutput,               \
+                cutlass::layout::TensorNCHW, float,                            \
+                cutlass::layout::TensorNCHW, int32_t,                          \
+                cutlass::convolution::ConvType::kConvolution,                  \
+                cutlass::arch::OpClassSimt, cutlass::arch::Sm61,               \
+                ThreadBlockShape, WarpShape, InstructionShape, EpilogueOp,     \
+                cutlass::convolution::threadblock::                            \
+                        ConvolutionNCxHWxThreadblockSwizzle<                   \
+                                cutlass::convolution::ConvType::kConvolution>, \
+                2, 4, aligned_, NeedLoadFromConstMem,                          \
+                cutlass::arch::OpMultiplyAdd>;                                 \
+        typename Convolution::ConvolutionParameter conv_param{                 \
+                param.n,  param.ci, param.co, param.hi, param.wi,              \
+                param.fh, param.fw, param.ho, param.wo, param.sh,              \
+                param.sw, param.ph, param.pw, 1,        1};                    \
+        return cutlass_convolution_wrapper<Convolution>(                       \
+                d_src, d_filter, d_bias, d_z, d_dst, workspace, conv_param,    \
+                epilogue, stream);                                             \
+    }
+#define DISPATCH_KERNEL                                                      \
+    DISPATCH_KERNEL_WITH_TILE_SHAPE(128, 128, 32, 64, 32, 32, 16);           \
+    DISPATCH_KERNEL_WITH_TILE_SHAPE(128, 64, 32, 64, 32, 32, 16);            \
+    DISPATCH_KERNEL_WITH_TILE_SHAPE(64, 128, 32, 64, 32, 32, 16);            \
+    DISPATCH_KERNEL_WITH_TILE_SHAPE(128, 32, 32, 64, 32, 32, 16);            \
+    DISPATCH_KERNEL_WITH_TILE_SHAPE(32, 128, 32, 32, 64, 32, 16);            \
+    DISPATCH_KERNEL_WITH_TILE_SHAPE(64, 64, 32, 64, 32, 32, 16);             \
+    DISPATCH_KERNEL_WITH_TILE_SHAPE(32, 64, 32, 32, 64, 32, 16);             \
+    DISPATCH_KERNEL_WITH_TILE_SHAPE(64, 32, 32, 64, 32, 32, 16);             \
+    DISPATCH_KERNEL_WITH_TILE_SHAPE(32, 32, 32, 32, 32, 32, 16);             \
+    DISPATCH_KERNEL_WITH_TILE_SHAPE(16, 64, 8, 16, 64, 8, 4);                \
+    megdnn_assert(false,                                                     \
+                  "unsupported threadblock shape (%dx%dx%d) and warp shape " \
+                  "(%dx%dx%d)",                                              \
+                  threadblock_shape.m(), threadblock_shape.n(),              \
+                  threadblock_shape.k(), warp_shape.m(), warp_shape.n(),     \
+                  warp_shape.k());
+    using ElementOutput = float;
+    using ElementAccumulator = int32_t;
+    using ElementBias = float;
+    using ElementCompute = float;
+    using NonlineMode = megdnn::param_enumv::ConvBias::NonlineMode;
+    switch (nonlinear_mode) {
+        case NonlineMode::IDENTITY: {
+            using EpilogueOp =
+                    cutlass::epilogue::thread::BiasAddLinearCombination<
+                            ElementOutput, 1, ElementAccumulator, ElementBias,
+                            ElementCompute>;
+            typename EpilogueOp::Params epilogue{alpha, beta, gamma};
+            DISPATCH_KERNEL;
+        }
+        case NonlineMode::RELU: {
+            using EpilogueOp =
+                    cutlass::epilogue::thread::BiasAddLinearCombinationRelu<
+                            ElementOutput, 1, ElementAccumulator, ElementBias,
+                            ElementCompute>;
+            typename EpilogueOp::Params epilogue{alpha, beta, gamma, 0};
+            DISPATCH_KERNEL;
+        }
+        case NonlineMode::H_SWISH: {
+            using EpilogueOp =
+                    cutlass::epilogue::thread::BiasAddLinearCombinationHSwish<
+                            ElementOutput, 1, ElementAccumulator, ElementBias,
+                            ElementCompute>;
+            typename EpilogueOp::Params epilogue{alpha, beta, gamma, scale};
+            DISPATCH_KERNEL;
+        }
+        default:
+            megdnn_assert(false,
+                          "unsupported nonlinear mode for conv bias operator");
+    }
+#undef DISPATCH_KERNEL_WITH_TILE_SHAPE
+#undef DISPATCH_KERNEL
+}
+#endif
+
+#define INST(need_load_from_const_mem)                                   \
+    template void megdnn::cuda::cutlass_wrapper::                        \
+            do_conv_bias_int8_implicit_gemm_dp4a_ncdiv4hw4_nchw<         \
+                    need_load_from_const_mem>(                           \
+                    const int8_t* d_src, const int8_t* d_filter,         \
+                    const float* d_bias, const float* d_z, float* d_dst, \
+                    int* workspace, const convolution::ConvParam& param, \
+                    uint32_t nonlinear_mode, float alpha, float beta,    \
+                    float gamma, float scale,                            \
+                    const GemmCoord& threadblock_shape,                  \
+                    const GemmCoord& warp_shape, cudaStream_t stream);
+INST(true);
+INST(false);
+#undef INST
 // vim: syntax=cuda.doxygen

dnn/src/cuda/conv_bias/cutlass_convolution_wrapper.cuh

@@ -22,8 +22,11 @@ using GemmCoord = cutlass::gemm::GemmCoord;
 
 template <typename Convolution>
 void cutlass_convolution_wrapper(
-        const int8_t* d_src, const int8_t* d_filter, const int32_t* d_bias,
-        const int8_t* d_z, int8_t* d_dst, int* workspace,
+        const typename Convolution::ElementSrc* d_src,
+        const typename Convolution::ElementFilter* d_filter,
+        const typename Convolution::ElementBias* d_bias,
+        const typename Convolution::ElementDst* d_z,
+        typename Convolution::ElementDst* d_dst, int* workspace,
         typename Convolution::ConvolutionParameter const& conv_param,
         typename Convolution::EpilogueOutputOp::Params const& epilogue,
         cudaStream_t stream);
@@ -46,6 +49,15 @@ void do_conv_bias_int8_implicit_gemm_dp4a_ncdiv4hw4(
         const GemmCoord& threadblock_shape, const GemmCoord& warp_shape,
         cudaStream_t stream);
 
+template <bool NeedLoadFromConstMem>
+void do_conv_bias_int8_implicit_gemm_dp4a_ncdiv4hw4_nchw(
+        const int8_t* d_src, const int8_t* d_filter, const float* d_bias,
+        const float* d_z, float* d_dst, int* workspace,
+        const convolution::ConvParam& param, uint32_t nonlinear_mode,
+        float alpha, float beta, float gamma, float scale,
+        const GemmCoord& threadblock_shape, const GemmCoord& warp_shape,
+        cudaStream_t stream);
+
 }  // namespace cutlass_wrapper
 }  // namespace cuda
 }  // namespace megdnn

dnn/src/cuda/conv_bias/implicit_gemm_int8_nchw4_dp4a.cpp

@@ -32,10 +32,26 @@ bool ConvBiasForwardImpl::AlgoInt8NCHW4DotProdImplicitGemm::is_available(
     if (!conv_bias::check_bias_share_in_channel(*(args.bias_layout),
                                                 param.format))
         return false;
-    if (param.format != Format::NCHW4)
+    if (param.format != Format::NCHW4 && param.format != Format::NCHW4_NCHW &&
+        param.format != Format::NCHW4_NCHW32)
         return false;
-    UNPACK_CONV_BIAS_NCHW4_PARAM(*(args.src_layout), fm, *(args.dst_layout),
-                                 param);
+    size_t n = args.src_layout->operator[](0),
+           ci = args.src_layout->operator[](1) * 4,
+           hi = args.src_layout->operator[](2),
+           wi = args.src_layout->operator[](3);
+    size_t ho = args.dst_layout->operator[](2),
+           wo = args.dst_layout->operator[](3);
+    size_t co;
+    if (param.format == Format::NCHW4) {
+        co = args.dst_layout->operator[](1) * 4;
+    } else if (param.format == Format::NCHW4_NCHW) {
+        co = args.dst_layout->operator[](1);
+    } else {
+        megdnn_assert(param.format == Format::NCHW4_NCHW32);
+        co = args.dst_layout->operator[](1) * 32;
+    }
+    UNPACK_CONV_PARAMETER(fm, param);
+    MARK_USED_VAR
     // TODO support group conv
     available &= param.sparse == Sparse::DENSE;
     // mode must be cross correlation
@@ -46,9 +62,11 @@ bool ConvBiasForwardImpl::AlgoInt8NCHW4DotProdImplicitGemm::is_available(
          bias_dtype = args.bias_layout->dtype,
          dst_dtype = args.dst_layout->dtype;
     available &= (src_dtype.enumv() == DTypeEnum::QuantizedS8 &&
-                  filter_dtype.enumv() == DTypeEnum::QuantizedS8 &&
-                  bias_dtype.enumv() == DTypeEnum::QuantizedS32 &&
-                  dst_dtype.enumv() == DTypeEnum::QuantizedS8);
+                  filter_dtype.enumv() == DTypeEnum::QuantizedS8);
+    available &= (bias_dtype.enumv() == DTypeEnum::QuantizedS32 &&
+                  dst_dtype.enumv() == DTypeEnum::QuantizedS8) ||
+                 (bias_dtype.enumv() == DTypeEnum::Float32 &&
+                  dst_dtype.enumv() == DTypeEnum::Float32);
     // TODO: support dialtion
     available &= dh == 1 && dw == 1;
     // only support sm_61 or later, platform should have fast native int8
@@ -81,8 +99,23 @@ void ConvBiasForwardImpl::AlgoInt8NCHW4DotProdImplicitGemm::exec(
     using Format = Param::Format;
     auto&& param = args.opr->param();
     auto&& fm = args.filter_meta;
-    UNPACK_CONV_BIAS_NCHW4_PARAM(*(args.src_layout), fm, *(args.dst_layout),
-                                 param);
+    size_t n = args.src_layout->operator[](0),
+           ci = args.src_layout->operator[](1) * 4,
+           hi = args.src_layout->operator[](2),
+           wi = args.src_layout->operator[](3);
+    size_t ho = args.dst_layout->operator[](2),
+           wo = args.dst_layout->operator[](3);
+    size_t co;
+    if (param.format == Format::NCHW4) {
+        co = args.dst_layout->operator[](1) * 4;
+    } else if (param.format == Format::NCHW4_NCHW) {
+        co = args.dst_layout->operator[](1);
+    } else {
+        megdnn_assert(param.format == Format::NCHW4_NCHW32);
+        co = args.dst_layout->operator[](1) * 32;
+    }
+    UNPACK_CONV_PARAMETER(fm, param);
+    MARK_USED_VAR
     auto&& stream = cuda_stream(args.opr->handle());
 
     int8_t* filter_ptr = nullptr;
@@ -115,47 +148,107 @@ void ConvBiasForwardImpl::AlgoInt8NCHW4DotProdImplicitGemm::exec(
 
     float src_scale = args.src_layout->dtype.param<dtype::QuantizedS8>().scale,
           filter_scale =
-                  args.filter_layout->dtype.param<dtype::QuantizedS8>().scale,
-          bias_scale =
-                  args.bias_layout->dtype.param<dtype::QuantizedS32>().scale,
-          dst_scale = args.dst_layout->dtype.param<dtype::QuantizedS8>().scale;
-    float alpha = src_scale * filter_scale / dst_scale,
-          beta = bias_scale / dst_scale;
-    int8_t* z_dev_ptr = nullptr;
-    float gamma = 0.0;
+                  args.filter_layout->dtype.param<dtype::QuantizedS8>().scale;
+    float alpha = src_scale * filter_scale;
+    float beta = 1.f;
+    float dst_scale = 1.f;
+    if (args.bias_layout->dtype.enumv() == DTypeEnum::QuantizedS32) {
+        megdnn_assert(args.dst_layout->dtype.enumv() == DTypeEnum::QuantizedS8);
+        float bias_scale = args.bias_layout->dtype.param<dtype::QuantizedS32>()
+                                   .scale,
+              dst_scale =
+                      args.dst_layout->dtype.param<dtype::QuantizedS8>().scale;
+        alpha /= dst_scale, beta = bias_scale / dst_scale;
+    }
+    float gamma = 0.f;
     if (args.z_layout->ndim > 0) {
-        z_dev_ptr = args.z_tensor->compatible_ptr<int8_t>();
-        float z_scale = args.z_layout->dtype.param<dtype::QuantizedS8>().scale;
-        gamma = z_scale / dst_scale;
+        gamma = 1.f;
+        if (args.z_layout->dtype.enumv() == DTypeEnum::QuantizedS8) {
+            megdnn_assert(args.dst_layout->dtype.enumv() ==
+                          DTypeEnum::QuantizedS8);
+            float z_scale = args.z_layout->dtype.param<dtype::QuantizedS8>()
+                                    .scale;
+            gamma = z_scale / dst_scale;
+        }
     }
     uint32_t nonlinear_mode = static_cast<uint32_t>(param.nonlineMode);
     if (fh == 1 && fw == 1) {
-        cutlass_wrapper::do_conv_bias_int8_implicit_gemm_dp4a_ncdiv4hw4<false>(
-                args.src_tensor->compatible_ptr<int8_t>(), filter_ptr,
-                args.bias_tensor->compatible_ptr<int32_t>(), z_dev_ptr,
-                args.dst_tensor->compatible_ptr<int8_t>(), nullptr, kern_param,
-                nonlinear_mode, alpha, beta, gamma, dst_scale,
-                cutlass_wrapper::GemmCoord{m_algo_param.threadblock_m,
-                                           m_algo_param.threadblock_n,
-                                           m_algo_param.threadblock_k},
-                cutlass_wrapper::GemmCoord{m_algo_param.warp_m,
-                                           m_algo_param.warp_n,
-                                           m_algo_param.warp_k},
-                stream);
+        if (param.format == Format::NCHW4) {
+            cutlass_wrapper::do_conv_bias_int8_implicit_gemm_dp4a_ncdiv4hw4<
+                    false>(
+                    args.src_tensor->compatible_ptr<int8_t>(), filter_ptr,
+                    args.bias_tensor->compatible_ptr<int32_t>(),
+                    args.z_tensor->compatible_ptr<int8_t>(),
+                    args.dst_tensor->compatible_ptr<int8_t>(), nullptr,
+                    kern_param, nonlinear_mode, alpha, beta, gamma, dst_scale,
+                    cutlass_wrapper::GemmCoord{m_algo_param.threadblock_m,
+                                               m_algo_param.threadblock_n,
+                                               m_algo_param.threadblock_k},
+                    cutlass_wrapper::GemmCoord{m_algo_param.warp_m,
+                                               m_algo_param.warp_n,
+                                               m_algo_param.warp_k},
+                    stream);
+        } else if (param.format == Format::NCHW4_NCHW) {
+            cutlass_wrapper::
+                    do_conv_bias_int8_implicit_gemm_dp4a_ncdiv4hw4_nchw<false>(
+                            args.src_tensor->compatible_ptr<int8_t>(),
+                            filter_ptr,
+                            args.bias_tensor->compatible_ptr<float>(),
+                            args.z_tensor->compatible_ptr<float>(),
+                            args.dst_tensor->compatible_ptr<float>(), nullptr,
+                            kern_param, nonlinear_mode, alpha, beta, gamma,
+                            dst_scale,
+                            cutlass_wrapper::GemmCoord{
+                                    m_algo_param.threadblock_m,
+                                    m_algo_param.threadblock_n,
+                                    m_algo_param.threadblock_k},
+                            cutlass_wrapper::GemmCoord{m_algo_param.warp_m,
+                                                       m_algo_param.warp_n,
+                                                       m_algo_param.warp_k},
+                            stream);
+        } else {
+            megdnn_assert(param.format == Format::NCHW4_NCHW32);
+        }
     } else {
-        cutlass_wrapper::do_conv_bias_int8_implicit_gemm_dp4a_ncdiv4hw4<true>(
-                args.src_tensor->compatible_ptr<int8_t>(), filter_ptr,
-                args.bias_tensor->compatible_ptr<int32_t>(), z_dev_ptr,
-                args.dst_tensor->compatible_ptr<int8_t>(), nullptr, kern_param,
-                nonlinear_mode, alpha, beta, gamma, dst_scale,
-                cutlass_wrapper::GemmCoord{m_algo_param.threadblock_m,
-                                           m_algo_param.threadblock_n,
-                                           m_algo_param.threadblock_k},
-                cutlass_wrapper::GemmCoord{m_algo_param.warp_m,
-                                           m_algo_param.warp_n,
-                                           m_algo_param.warp_k},
-                stream);
+        if (param.format == Format::NCHW4) {
+            cutlass_wrapper::do_conv_bias_int8_implicit_gemm_dp4a_ncdiv4hw4<
+                    true>(
+                    args.src_tensor->compatible_ptr<int8_t>(), filter_ptr,
+                    args.bias_tensor->compatible_ptr<int32_t>(),
+                    args.z_tensor->compatible_ptr<int8_t>(),
+                    args.dst_tensor->compatible_ptr<int8_t>(), nullptr,
+                    kern_param, nonlinear_mode, alpha, beta, gamma, dst_scale,
+                    cutlass_wrapper::GemmCoord{m_algo_param.threadblock_m,
+                                               m_algo_param.threadblock_n,
+                                               m_algo_param.threadblock_k},
+                    cutlass_wrapper::GemmCoord{m_algo_param.warp_m,
+                                               m_algo_param.warp_n,
+                                               m_algo_param.warp_k},
+                    stream);
+        } else if (param.format == Format::NCHW4_NCHW) {
+            cutlass_wrapper::
+                    do_conv_bias_int8_implicit_gemm_dp4a_ncdiv4hw4_nchw<true>(
+                            args.src_tensor->compatible_ptr<int8_t>(),
+                            filter_ptr,
+                            args.bias_tensor->compatible_ptr<float>(),
+                            args.z_tensor->compatible_ptr<float>(),
+                            args.dst_tensor->compatible_ptr<float>(), nullptr,
+                            kern_param, nonlinear_mode, alpha, beta, gamma,
+                            dst_scale,
+                            cutlass_wrapper::GemmCoord{
+                                    m_algo_param.threadblock_m,
+                                    m_algo_param.threadblock_n,
+                                    m_algo_param.threadblock_k},
+                            cutlass_wrapper::GemmCoord{m_algo_param.warp_m,
+                                                       m_algo_param.warp_n,
+                                                       m_algo_param.warp_k},
+                            stream);
+
+        } else {
+            megdnn_assert(param.format == Format::NCHW4_NCHW32);
+        }
     }
+    after_kernel_launch();
 }
 
 size_t ConvBiasForwardImpl::AlgoInt8NCHW4DotProdImplicitGemm::
@@ -174,8 +267,23 @@ void ConvBiasForwardImpl::AlgoInt8NCHW4DotProdImplicitGemm::exec_preprocess(
     using Format = Param::Format;
     auto&& param = args.opr->param();
     auto&& fm = args.filter_meta;
-    UNPACK_CONV_BIAS_NCHW4_PARAM(*(args.src_layout), fm, *(args.dst_layout),
-                                 param);
+    size_t n = args.src_layout->operator[](0),
+           ci = args.src_layout->operator[](1) * 4,
+           hi = args.src_layout->operator[](2),
+           wi = args.src_layout->operator[](3);
+    size_t ho = args.dst_layout->operator[](2),
+           wo = args.dst_layout->operator[](3);
+    size_t co;
+    if (param.format == Format::NCHW4) {
+        co = args.dst_layout->operator[](1) * 4;
+    } else if (param.format == Format::NCHW4_NCHW) {
+        co = args.dst_layout->operator[](1);
+    } else {
+        megdnn_assert(param.format == Format::NCHW4_NCHW32);
+        co = args.dst_layout->operator[](1) * 32;
+    }
+    UNPACK_CONV_PARAMETER(fm, param);
+    MARK_USED_VAR
     TensorLayout src{{co, ci / 4 * fh * fw}, dtype::Int32()};
     src.init_contiguous_stride();
     TensorLayout dst = src;

dnn/src/cuda/conv_bias/int8/conv_bias_int8_implicit_gemm_cutlass_wrapper.cuinl

@@ -19,25 +19,28 @@ using namespace cutlass_wrapper;
 
 template <typename Convolution>
 void megdnn::cuda::cutlass_wrapper::cutlass_convolution_wrapper(
-        const int8_t* d_src, const int8_t* d_filter, const int32_t* d_bias,
-        const int8_t* d_z, int8_t* d_dst, int* workspace,
+        const typename Convolution::ElementSrc* d_src,
+        const typename Convolution::ElementFilter* d_filter,
+        const typename Convolution::ElementBias* d_bias,
+        const typename Convolution::ElementDst* d_z,
+        typename Convolution::ElementDst* d_dst, int* workspace,
         typename Convolution::ConvolutionParameter const& conv_param,
         typename Convolution::EpilogueOutputOp::Params const& epilogue,
         cudaStream_t stream) {
     typename Convolution::TensorRefSrc tensor_src{
-            const_cast<int8_t*>(d_src),
+            const_cast<typename Convolution::ElementSrc*>(d_src),
             Convolution::LayoutSrc::packed({conv_param.n(), conv_param.hi(),
                                             conv_param.wi(), conv_param.ci()})};
     typename Convolution::TensorRefFilter tensor_filter{
-            const_cast<int8_t*>(d_filter),
+            const_cast<typename Convolution::ElementFilter*>(d_filter),
             Convolution::LayoutFilter::packed({conv_param.co(), conv_param.fh(),
                                                conv_param.fw(),
                                                conv_param.ci()})};
     typename Convolution::TensorRefBias tensor_bias{
-            const_cast<int32_t*>(d_bias),
+            const_cast<typename Convolution::ElementBias*>(d_bias),
             Convolution::LayoutBias::packed({1, 1, 1, conv_param.co()})};
     typename Convolution::TensorRefDst tensor_z{
-            const_cast<int8_t*>(d_z),
+            const_cast<typename Convolution::ElementDst*>(d_z),
             Convolution::LayoutDst::packed({conv_param.n(), conv_param.ho(),
                                             conv_param.wo(), conv_param.co()})};
     typename Convolution::TensorRefDst tensor_dst{