#include "ggml.h"
#include "common.cuh"
#include "mmvf.cuh"

template <typename T, typename type_acc, int ncols_dst, int block_size>
static __global__ void mul_mat_vec_f(
        const T * __restrict__ x, const float * __restrict__ y, const int32_t * __restrict__ ids, float * __restrict__ dst,
        const int ncols2, const int nchannels_y, const int stride_row, const int stride_col_y2, const int stride_col_dst,
        const int channel_ratio, const int stride_channel_x, const int stride_channel_y, const int stride_channel_dst,
        const int sample_ratio, const int stride_sample_x, const int stride_sample_y, const int stride_sample_dst) {
    const int row         = blockIdx.x;
    const int channel_dst = blockIdx.y;
    const int channel_x   = ids ? ids[channel_dst]          : channel_dst / channel_ratio;
    const int channel_y   = ids ? channel_dst % nchannels_y : channel_dst;
    const int sample_dst  = blockIdx.z;
    const int sample_x    = sample_dst / sample_ratio;
    const int sample_y    = sample_dst;
    const int tid         = threadIdx.x;

    constexpr int warp_size   = ggml_cuda_get_physical_warp_size();

    x   += int64_t(sample_x)  *stride_sample_x   + channel_x  *stride_channel_x   + row*stride_row;
    y   += int64_t(sample_y)  *stride_sample_y   + channel_y  *stride_channel_y;
    dst += int64_t(sample_dst)*stride_sample_dst + channel_dst*stride_channel_dst;

    const float2 * y2 = (const float2 *) y;

    extern __shared__ char data_mmv[];
    float * buf_iw = (float *) data_mmv;

    if (block_size > warp_size) {
        if (tid < warp_size) {
            buf_iw[tid] = 0.0f;
        }
        __syncthreads();
    }

    float sumf[ncols_dst] = {0.0f};

    if constexpr (std::is_same_v<T, float>) {
        const float2 * x2 = (const float2 *) x;

        for (int col2 = tid; col2 < ncols2; col2 += block_size) {
            const float2 tmpx = x2[col2];

#pragma unroll
            for (int j = 0; j < ncols_dst; ++j) {
                const float2 tmpy = y2[j*stride_col_y2 + col2];
                sumf[j] += tmpx.x*tmpy.x;
                sumf[j] += tmpx.y*tmpy.y;
            }
        }
    } else if constexpr (std::is_same_v<T, half>) {
        const half2 * x2 = (const half2 *) x;

        if (std::is_same_v<type_acc, float>) {
            for (int col2 = tid; col2 < ncols2; col2 += block_size) {
                const float2 tmpx = __half22float2(x2[col2]);

#pragma unroll
                for (int j = 0; j < ncols_dst; ++j) {
                    const float2 tmpy = y2[j*stride_col_y2 + col2];
                    sumf[j] += tmpx.x * tmpy.x;
                    sumf[j] += tmpx.y * tmpy.y;
                }
            }
        } else {
#ifdef FP16_AVAILABLE
            half2 sumh2[ncols_dst] = {{0.0f, 0.0f}};

            for (int col2 = tid; col2 < ncols2; col2 += block_size) {
                const half2 tmpx = x2[col2];

#pragma unroll
                for (int j = 0; j < ncols_dst; ++j) {
                    const float2 tmpy = y2[j*stride_col_y2 + col2];
                    sumh2[j] += tmpx * make_half2(tmpy.x, tmpy.y);
                }
            }

#pragma unroll
            for (int j = 0; j < ncols_dst; ++j) {
                sumf[j] = __low2float(sumh2[j]) + __high2float(sumh2[j]);
            }
#else
            NO_DEVICE_CODE;
#endif // FP16_AVAILABLE
        }
    } else if constexpr (std::is_same_v<T, nv_bfloat16>) {
        const int * x2 = (const int *) x;
        for (int col2 = tid; col2 < ncols2; col2 += block_size) {
            const int tmpx = x2[col2];
#pragma unroll
            for (int j = 0; j < ncols_dst; ++j) {
                const float2 tmpy = y2[j*stride_col_y2 + col2];
                sumf[j] += float(reinterpret_cast<const nv_bfloat16 *>(&tmpx)[0]) * tmpy.x;
                sumf[j] += float(reinterpret_cast<const nv_bfloat16 *>(&tmpx)[1]) * tmpy.y;
            }
        }
    } else {
        static_assert(std::is_same_v<T, void>, "unsupported type");
    }

#pragma unroll
    for (int j = 0; j < ncols_dst; ++j) {
        sumf[j] = warp_reduce_sum<warp_size>(sumf[j]);

        if (block_size > warp_size) {
            buf_iw[tid/warp_size] = sumf[j];
            __syncthreads();
            if (tid < warp_size) {
                sumf[j] = buf_iw[tid];
                sumf[j] = warp_reduce_sum<warp_size>(sumf[j]);
            }
            if (j < ncols_dst) {
                __syncthreads();
            }
        }
    }

    if (tid >= ncols_dst) {
        return;
    }

    dst[tid*stride_col_dst + row] = sumf[tid];
}

template <typename T, typename type_acc, int ncols_dst>
static void launch_mul_mat_vec_f_cuda(
        const T * x, const float * y, const int32_t * ids, float * dst,
        const int64_t ncols, const int64_t nrows,
        const int64_t stride_row, const int64_t stride_col_y, const int64_t stride_col_dst,
        const int64_t nchannels_x, const int64_t nchannels_y, const int64_t nchannels_dst,
        const int64_t stride_channel_x, const int64_t stride_channel_y, const int64_t stride_channel_dst, const int64_t nsamples_x,
        const int64_t nsamples_dst, const int64_t stride_sample_x, const int64_t stride_sample_y, const int64_t stride_sample_dst,
        cudaStream_t stream) {
    GGML_ASSERT(ncols        % 2 == 0);
    GGML_ASSERT(stride_row   % 2 == 0);
    GGML_ASSERT(stride_col_y % 2 == 0);
    GGML_ASSERT(ids || nchannels_dst % nchannels_x == 0);
    GGML_ASSERT(       nsamples_dst  % nsamples_x  == 0);
    const int64_t channel_ratio = nchannels_dst / nchannels_x;
    const int64_t sample_ratio  = nsamples_dst  / nsamples_x;

    const int device = ggml_cuda_get_device();
    const int warp_size = ggml_cuda_info().devices[device].warp_size;

    int64_t block_size_best = warp_size;
    int64_t niter_best      = (ncols + 2*warp_size - 1) / (2*warp_size);
    int64_t max_block_size  = 256;
    if(ggml_cuda_info().devices[device].cc > GGML_CUDA_CC_OFFSET_AMD && ggml_cuda_info().devices[device].cc < GGML_CUDA_CC_RDNA1) {
        max_block_size = 128;
    }
    for (int64_t block_size = 2*warp_size; block_size <= max_block_size; block_size += warp_size) {
        const int64_t niter = (ncols + 2*block_size - 1) / (2*block_size);
        if (niter < niter_best) {
            niter_best      = niter;
            block_size_best = block_size;
        }
    }

    const int nbytes_shared = warp_size*sizeof(float);
    const dim3 block_nums(nrows, nchannels_dst, nsamples_dst);
    const dim3 block_dims(block_size_best, 1, 1);
    switch (block_size_best) {
        case   32: {
            mul_mat_vec_f<T, type_acc, ncols_dst,  32><<<block_nums, block_dims, nbytes_shared, stream>>>
                (x, y, ids, dst, ncols/2, nchannels_y, stride_row, stride_col_y/2, stride_col_dst,
                 channel_ratio, stride_channel_x, stride_channel_y, stride_channel_dst,
                 sample_ratio, stride_sample_x, stride_sample_y, stride_sample_dst);
        } break;
        case   64: {
            mul_mat_vec_f<T, type_acc, ncols_dst,  64><<<block_nums, block_dims, nbytes_shared, stream>>>
                (x, y, ids, dst, ncols/2, nchannels_y, stride_row, stride_col_y/2, stride_col_dst,
                 channel_ratio, stride_channel_x, stride_channel_y, stride_channel_dst,
                 sample_ratio, stride_sample_x, stride_sample_y, stride_sample_dst);
        } break;
        case   96: {
            mul_mat_vec_f<T, type_acc, ncols_dst,  96><<<block_nums, block_dims, nbytes_shared, stream>>>
                (x, y, ids, dst, ncols/2, nchannels_y, stride_row, stride_col_y/2, stride_col_dst,
                 channel_ratio, stride_channel_x, stride_channel_y, stride_channel_dst,
                 sample_ratio, stride_sample_x, stride_sample_y, stride_sample_dst);
        } break;
        case  128: {
            mul_mat_vec_f<T, type_acc, ncols_dst, 128><<<block_nums, block_dims, nbytes_shared, stream>>>
                (x, y, ids, dst, ncols/2, nchannels_y, stride_row, stride_col_y/2, stride_col_dst,
                 channel_ratio, stride_channel_x, stride_channel_y, stride_channel_dst,
                 sample_ratio, stride_sample_x, stride_sample_y, stride_sample_dst);
        } break;
        case  160: {
            mul_mat_vec_f<T, type_acc, ncols_dst, 160><<<block_nums, block_dims, nbytes_shared, stream>>>
                (x, y, ids, dst, ncols/2, nchannels_y, stride_row, stride_col_y/2, stride_col_dst,
                 channel_ratio, stride_channel_x, stride_channel_y, stride_channel_dst,
                 sample_ratio, stride_sample_x, stride_sample_y, stride_sample_dst);
        } break;
        case  192: {
            mul_mat_vec_f<T, type_acc, ncols_dst, 192><<<block_nums, block_dims, nbytes_shared, stream>>>
                (x, y, ids, dst, ncols/2, nchannels_y, stride_row, stride_col_y/2, stride_col_dst,
                 channel_ratio, stride_channel_x, stride_channel_y, stride_channel_dst,
                 sample_ratio, stride_sample_x, stride_sample_y, stride_sample_dst);
        } break;
        case  224: {
            mul_mat_vec_f<T, type_acc, ncols_dst, 224><<<block_nums, block_dims, nbytes_shared, stream>>>
                (x, y, ids, dst, ncols/2, nchannels_y, stride_row, stride_col_y/2, stride_col_dst,
                 channel_ratio, stride_channel_x, stride_channel_y, stride_channel_dst,
                 sample_ratio, stride_sample_x, stride_sample_y, stride_sample_dst);
        } break;
        case  256: {
            mul_mat_vec_f<T, type_acc, ncols_dst, 256><<<block_nums, block_dims, nbytes_shared, stream>>>
                (x, y, ids, dst, ncols/2, nchannels_y, stride_row, stride_col_y/2, stride_col_dst,
                 channel_ratio, stride_channel_x, stride_channel_y, stride_channel_dst,
                 sample_ratio, stride_sample_x, stride_sample_y, stride_sample_dst);
        } break;
        default: {
            GGML_ABORT("fatal error");
        } break;
    }
}

template <typename T, typename type_acc>
static void mul_mat_vec_f_cuda_switch_ncols_dst(
        const T * x, const float * y, const int32_t * ids, float * dst,
        const int64_t ncols, const int64_t nrows, const int64_t ncols_dst,
        const int64_t stride_row, const int64_t stride_col_y, const int64_t stride_col_dst,
        const int64_t nchannels_x, const int64_t nchannels_y, const int64_t nchannels_dst,
        const int64_t stride_channel_x, const int64_t stride_channel_y, const int64_t stride_channel_dst, const int64_t nsamples_x,
        const int64_t nsamples_dst, const int64_t stride_sample_x, const int64_t stride_sample_y, const int64_t stride_sample_dst,
        cudaStream_t stream) {
    switch (ncols_dst) {
        case 1:
            launch_mul_mat_vec_f_cuda<T, type_acc, 1>
                (x, y, ids, dst, ncols, nrows, stride_row, stride_col_y, stride_col_dst,
                 nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y,
                 stride_channel_dst, nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, stream);
            break;
        case 2:
            launch_mul_mat_vec_f_cuda<T, type_acc, 2>
                (x, y, ids, dst, ncols, nrows, stride_row, stride_col_y, stride_col_dst,
                 nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y,
                 stride_channel_dst, nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, stream);
            break;
        case 3:
            launch_mul_mat_vec_f_cuda<T, type_acc, 3>
                (x, y, ids, dst, ncols, nrows, stride_row, stride_col_y, stride_col_dst,
                 nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y,
                 stride_channel_dst, nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, stream);
            break;
        case 4:
            launch_mul_mat_vec_f_cuda<T, type_acc, 4>
                (x, y, ids, dst, ncols, nrows, stride_row, stride_col_y, stride_col_dst,
                 nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y,
                 stride_channel_dst, nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, stream);
            break;
        case 5:
            launch_mul_mat_vec_f_cuda<T, type_acc, 5>
                (x, y, ids, dst, ncols, nrows, stride_row, stride_col_y, stride_col_dst,
                 nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y,
                 stride_channel_dst, nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, stream);
            break;
        case 6:
            launch_mul_mat_vec_f_cuda<T, type_acc, 6>
                (x, y, ids, dst, ncols, nrows, stride_row, stride_col_y, stride_col_dst,
                 nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y,
                 stride_channel_dst, nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, stream);
            break;
        case 7:
            launch_mul_mat_vec_f_cuda<T, type_acc, 7>
                (x, y, ids, dst, ncols, nrows, stride_row, stride_col_y, stride_col_dst,
                 nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y,
                 stride_channel_dst, nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, stream);
            break;
        case 8:
            launch_mul_mat_vec_f_cuda<T, type_acc, 8>
                (x, y, ids, dst, ncols, nrows, stride_row, stride_col_y, stride_col_dst,
                 nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y,
                 stride_channel_dst, nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, stream);
            break;
        default:
            GGML_ABORT("fatal error");
            break;
    }
}

template<typename T>
static void mul_mat_vec_f_cuda(
        const T * x, const float * y, const int32_t * ids, float * dst,
        const int64_t ncols, const int64_t nrows, const int64_t ncols_dst,
        const int64_t stride_row, const int64_t stride_col_y, const int stride_col_dst,
        const int64_t nchannels_x, const int64_t nchannels_y, const int64_t nchannels_dst,
        const int64_t stride_channel_x, const int64_t stride_channel_y, const int64_t stride_channel_dst, const int64_t nsamples_x,
        const int64_t nsamples_dst, const int64_t stride_sample_x, const int64_t stride_sample_y, const int64_t stride_sample_dst,
        enum ggml_prec prec, cudaStream_t stream) {
    if constexpr(std::is_same_v<T, half>) {
        if (prec == GGML_PREC_DEFAULT) {
            mul_mat_vec_f_cuda_switch_ncols_dst<T, half>
                (x, y, ids, dst, ncols, nrows, ncols_dst, stride_row, stride_col_y, stride_col_dst,
                 nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y,
                 stride_channel_dst, nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, stream);
            return;
        }
    }
    mul_mat_vec_f_cuda_switch_ncols_dst<T, float>
        (x, y, ids, dst, ncols, nrows, ncols_dst, stride_row, stride_col_y, stride_col_dst,
         nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y,
         stride_channel_dst, nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, stream);
}

void ggml_cuda_mul_mat_vec_f(ggml_backend_cuda_context & ctx, const ggml_tensor * src0, const ggml_tensor * src1, const ggml_tensor * ids, ggml_tensor * dst) {
    GGML_ASSERT(        src1->type == GGML_TYPE_F32);
    GGML_ASSERT(!ids ||  ids->type == GGML_TYPE_I32);
    GGML_ASSERT(         dst->type == GGML_TYPE_F32);

    GGML_TENSOR_BINARY_OP_LOCALS;

    const size_t ts_src0 = ggml_type_size(src0->type);
    const size_t ts_src1 = ggml_type_size(src1->type);
    const size_t ts_dst  = ggml_type_size(dst->type);

    GGML_ASSERT(!ids || ne12 == 1); // Implementation is only correct for  batch size 1.
    GGML_ASSERT(ne13 == ne3);

    GGML_ASSERT(        nb00       == ts_src0);
    GGML_ASSERT(        nb10       == ts_src1);
    GGML_ASSERT(!ids || ids->nb[0] == ggml_type_size(ids->type));
    GGML_ASSERT(        nb0        == ts_dst);

    const int cc = ggml_cuda_info().devices[ggml_cuda_get_device()].cc;
    const enum ggml_prec prec = fast_fp16_available(cc) ? ggml_prec(dst->op_params[0]) : GGML_PREC_F32;

    const float   * src1_d =       (const float   *) src1->data;
    const int32_t *  ids_d = ids ? (const int32_t *)  ids->data : nullptr;
    float         *  dst_d =       (float         *)  dst->data;

    const int64_t s01 = src0->nb[1] / ts_src0;
    const int64_t s11 = src1->nb[1] / ts_src1;
    const int64_t s1  =  dst->nb[1] / ts_dst;
    const int64_t s02 = src0->nb[2] / ts_src0;
    const int64_t s12 = src1->nb[2] / ts_src1;
    const int64_t s2  =  dst->nb[2] / ts_dst;
    const int64_t s03 = src0->nb[3] / ts_src0;
    const int64_t s13 = src1->nb[3] / ts_src1;
    const int64_t s3  =  dst->nb[3] / ts_dst;

    // For MUL_MAT_ID the memory layout is different than for MUL_MAT:
    const int64_t ncols_dst          = ids ? ne2  : ne1;
    const int64_t nchannels_y        = ids ? ne11 : ne12;
    const int64_t nchannels_dst      = ids ? ne1  : ne2;
    const int64_t stride_channel_dst = ids ? s1   : s2;
    const int64_t stride_channel_y   = ids ? s11  : s12;

    GGML_ASSERT(!ids || ncols_dst == 1);

    switch (src0->type) {
        case GGML_TYPE_F32: {
            const float * src0_d = (const float *) src0->data;
            mul_mat_vec_f_cuda(src0_d, src1_d, ids_d, dst_d, ne00, ne01, ncols_dst, s01, s11, s1,
                ne02, nchannels_y, nchannels_dst, s02, stride_channel_y, stride_channel_dst,
                ne03,              ne3,           s03, s13,              s3,                 prec, ctx.stream());
        } break;
        case GGML_TYPE_F16: {
            const half * src0_d = (const half *) src0->data;
            mul_mat_vec_f_cuda(src0_d, src1_d, ids_d, dst_d, ne00, ne01, ncols_dst, s01, s11, s1,
                ne02, nchannels_y, nchannels_dst, s02, stride_channel_y, stride_channel_dst,
                ne03,              ne3,           s03, s13,              s3,                 prec, ctx.stream());
        } break;
        case GGML_TYPE_BF16: {
            const nv_bfloat16 * src0_d = (const nv_bfloat16 *) src0->data;
            mul_mat_vec_f_cuda(src0_d, src1_d, ids_d, dst_d, ne00, ne01, ncols_dst, s01, s11, s1,
                ne02, nchannels_y, nchannels_dst, s02, stride_channel_y, stride_channel_dst,
                ne03,              ne3,           s03, s13,              s3,                 prec, ctx.stream());
        } break;
        default:
            GGML_ABORT("unsupported type: %s", ggml_type_name(src0->type));
    }
}

void ggml_cuda_op_mul_mat_vec_f(
    ggml_backend_cuda_context & ctx,
    const ggml_tensor * src0, const ggml_tensor * src1, ggml_tensor * dst, const char * src0_dd_i, const float * src1_ddf_i,
    const char * src1_ddq_i, float * dst_dd_i, const int64_t row_low, const int64_t row_high, const int64_t src1_ncols,
    const int64_t src1_padded_row_size, cudaStream_t stream) {

    GGML_ASSERT(src1->type == GGML_TYPE_F32);
    GGML_ASSERT(dst->type  == GGML_TYPE_F32);

    const int64_t ne00 = src0->ne[0];
    const int64_t ne10 = src1->ne[0];
    const int64_t ne0  =  dst->ne[0];
    const int64_t row_diff = row_high - row_low;

    const int id = ggml_cuda_get_device();
    const int cc = ggml_cuda_info().devices[id].cc;
    const enum ggml_prec prec = fast_fp16_available(cc) ? ggml_prec(dst->op_params[0]) : GGML_PREC_F32;


    // ggml_cuda_op provides single, contiguous matrices
    const int64_t stride_row         = ne00;
    const int64_t stride_col_y       = ne10;
    const int64_t stride_col_dst     = id == ctx.device ? ne0 : row_diff; // main device has larger memory buffer
    const int64_t nchannels_x        = 1;
    const int64_t nchannels_y        = 1;
    const int64_t nchannels_dst      = 1;
    const int64_t stride_channel_x   = 0;
    const int64_t stride_channel_y   = 0;
    const int64_t stride_channel_dst = 0;
    const int64_t nsamples_x         = 1;
    const int64_t nsamples_dst       = 1;
    const int64_t stride_sample_x    = 0;
    const int64_t stride_sample_y    = 0;
    const int64_t stride_sample_dst  = 0;

    switch (src0->type) {
        case GGML_TYPE_F32: {
            const float * src0_d = (const float *) src0_dd_i;
            mul_mat_vec_f_cuda(src0_d, src1_ddf_i, nullptr, dst_dd_i, ne00, row_diff, src1_ncols, stride_row, stride_col_y, stride_col_dst,
                nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y, stride_channel_dst,
                nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, prec, stream);
        } break;
        case GGML_TYPE_F16: {
            const half * src0_d = (const half *) src0_dd_i;
            mul_mat_vec_f_cuda(src0_d, src1_ddf_i, nullptr, dst_dd_i, ne00, row_diff, src1_ncols, stride_row, stride_col_y, stride_col_dst,
                nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y, stride_channel_dst,
                nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, prec, stream);
        } break;
        case GGML_TYPE_BF16: {
            const nv_bfloat16 * src0_d = (const nv_bfloat16 *) src0_dd_i;
            mul_mat_vec_f_cuda(src0_d, src1_ddf_i, nullptr, dst_dd_i, ne00, row_diff, src1_ncols, stride_row, stride_col_y, stride_col_dst,
                nchannels_x, nchannels_y, nchannels_dst, stride_channel_x, stride_channel_y, stride_channel_dst,
                nsamples_x, nsamples_dst, stride_sample_x, stride_sample_y, stride_sample_dst, prec, stream);
        } break;
        default:
            GGML_ABORT("unsupported type: %s", ggml_type_name(src0->type));
    }

    GGML_UNUSED(ctx);
    GGML_UNUSED(src1);
    GGML_UNUSED(dst);
    GGML_UNUSED(src1_ddq_i);
    GGML_UNUSED(src1_ncols);
    GGML_UNUSED(src1_padded_row_size);
}

bool ggml_cuda_should_use_mmvf(enum ggml_type type, int cc, const int64_t * src0_ne, int64_t ne11) {
    if (src0_ne[0] % 2 != 0) {
        return false;
    }
    switch (type) {
        case GGML_TYPE_F32:
            if (GGML_CUDA_CC_IS_NVIDIA(cc)) {
                if (ampere_mma_available(cc)) {
                    return ne11 <= 3;
                }
                if (cc >= GGML_CUDA_CC_TURING) {
                    return ne11 <= 4;
                }
                return ne11 <= 3;
            } else if (GGML_CUDA_CC_IS_AMD(cc)) {
                if (fp32_mma_hardware_available(cc)) {
                    return ne11 <= 3;
                }
                return ne11 <= 8;
            }
            return ne11 <= 8;
        case GGML_TYPE_F16:
            if (GGML_CUDA_CC_IS_NVIDIA(cc)) {
                const bool src0_small = (src0_ne[1] <= 512 || src0_ne[2]*src0_ne[3] == 1);
                if (ampere_mma_available(cc)) {
                    return src0_small && ne11 == 1;
                }
                if (cc >= GGML_CUDA_CC_ADA_LOVELACE) {
                    return src0_small && ne11 <= 4;
                }
                if (fp16_mma_hardware_available(cc)) {
                    return src0_small && ne11 <= 3;
                }
                return ne11 <= 8;
            } else if (GGML_CUDA_CC_IS_AMD(cc)) {
                if (fp16_mma_hardware_available(cc)) {
                    if (GGML_CUDA_CC_IS_RDNA3(cc) || GGML_CUDA_CC_IS_RDNA4(cc)) {
                        return ne11 <= 5;
                    }
                    return ne11 <= 2;
                }
                return ne11 <= 8;
            }
            return ne11 <= 8;
        case GGML_TYPE_BF16:
            if (GGML_CUDA_CC_IS_NVIDIA(cc)) {
                const bool src0_small = (src0_ne[1] <= 512 || src0_ne[2]*src0_ne[3] == 1);
                if (ampere_mma_available(cc)) {
                    return src0_small && ne11 == 1;
                }
                if (cc >= GGML_CUDA_CC_ADA_LOVELACE) {
                    return src0_small && ne11 <= 4;
                }
                if (bf16_mma_hardware_available(cc)) {
                    return src0_small && ne11 <= 3;
                }
                return ne11 <= 8;
            } else if (GGML_CUDA_CC_IS_AMD(cc)) {
                if (bf16_mma_hardware_available(cc)) {
                    return ne11 <= 3;
                }
                return ne11 <= 8;
            }
            return ne11 <= 8;
        default:
            return false;
    }
}
