TheRock/rocm-libraries/projects/hipsparse/clients/samples/example_axpyi.c

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 *
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#include <hip/hip_runtime_api.h>
#include <hipsparse/hipsparse.h>
#include <stdio.h>
#include <stdlib.h>

#define HIP_CHECK(stat)                                                 \
    {                                                                   \
        if(stat != hipSuccess)                                          \
        {                                                               \
            fprintf(stderr, "Error: hip error in line %d\n", __LINE__); \
            return -1;                                                  \
        }                                                               \
    }

#define HIPSPARSE_CHECK(stat)                                                 \
    {                                                                         \
        if(stat != HIPSPARSE_STATUS_SUCCESS)                                  \
        {                                                                     \
            fprintf(stderr, "Error: hipsparse error in line %d\n", __LINE__); \
            return -1;                                                        \
        }                                                                     \
    }

int main()
{
    // Number of non-zeros of the sparse vector
    int nnz = 3;

    // Sparse index vector
    int hxInd[3] = {0, 3, 5};

    // Sparse value vector
    double hxVal[3] = {1.0, 2.0, 3.0};

    // Dense vector
    double hy[9] = {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0};

    // Scalar alpha
    double alpha = 3.7;

    // Index base
    hipsparseIndexBase_t idxBase = HIPSPARSE_INDEX_BASE_ZERO;

    // Offload data to device
    int*    dxInd;
    double* dxVal;
    double* dy;

    HIP_CHECK(hipMalloc((void**)&dxInd, sizeof(int) * nnz));
    HIP_CHECK(hipMalloc((void**)&dxVal, sizeof(double) * nnz));
    HIP_CHECK(hipMalloc((void**)&dy, sizeof(double) * 9));

    HIP_CHECK(hipMemcpy(dxInd, hxInd, sizeof(int) * nnz, hipMemcpyHostToDevice));
    HIP_CHECK(hipMemcpy(dxVal, hxVal, sizeof(double) * nnz, hipMemcpyHostToDevice));
    HIP_CHECK(hipMemcpy(dy, hy, sizeof(double) * 9, hipMemcpyHostToDevice));

    // hipSPARSE handle
    hipsparseHandle_t handle;
    HIPSPARSE_CHECK(hipsparseCreate(&handle));

    // Call daxpyi to perform y = y + alpha * x
    HIPSPARSE_CHECK(hipsparseDaxpyi(handle, nnz, &alpha, dxVal, dxInd, dy, idxBase));

    // Copy result back to host
    HIP_CHECK(hipMemcpy(hy, dy, sizeof(double) * 9, hipMemcpyDeviceToHost));

    // Clear hipSPARSE
    HIPSPARSE_CHECK(hipsparseDestroy(handle));

    // Clear device memory
    HIP_CHECK(hipFree(dxInd));
    HIP_CHECK(hipFree(dxVal));
    HIP_CHECK(hipFree(dy));

    return 0;
}