decuda 0.1.1

CUDA to HIP, SYCL, OpenCL, and Rust GPU migration tool — automatic source-code translator for porting CUDA C++ kernels to AMD ROCm HIP, Intel oneAPI SYCL, Khronos OpenCL, and Rust GPU (cust / rust-gpu)
Documentation 
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// Generated by decuda. Edit with care.
// HIP is mostly source-compatible with CUDA at the kernel level.
// Compare against the original .cu file for sanity.

// Example CUDA source for decuda. This file is the input used to generate
// the sibling .hip.cpp / .sycl.cpp / .rs / .cl example outputs.
//
// Regenerate the outputs with:
//   cargo run -- migrate -i examples/saxpy.cu -o examples/out --target all
//
// It exercises the four main CUDA constructs decuda handles:
//   1. __global__ kernel qualifiers and definitions
//   2. Kernel launch syntax: kernel<<<grid, block>>>(...)
//   3. Built-in variables: threadIdx, blockIdx, blockDim
//   4. Runtime API calls: cudaMalloc, cudaMemcpy, cudaFree
//   5. Shared memory and synchronization
#include <hip/hip_runtime.h> /* was: cuda_runtime.h */

__global__ void saxpy(float a, float* x, float* y, int n) {
    int i = blockIdx.x * blockDim.x + threadIdx.x;
    if (i < n) {
        y[i] = a * x[i] + y[i];
    }
}

__global__ void sum_reduce(const float* in, float* out, int n) {
    __shared__ float buf[32];
    int tid = threadIdx.x;
    buf[tid] = (tid < n) ? in[tid] : 0.0f;
    __syncthreads();
    if (tid == 0) {
        float s = 0.0f;
        for (int i = 0; i < 32; ++i) s += buf[i];
        *out = s;
    }
}

int main(void) {
    const int N = 1024;
    float *dx = nullptr, *dy = nullptr;
    hipMalloc((void**)&dx, N * sizeof(float));
    hipMalloc((void**)&dy, N * sizeof(float));

    dim3 grid(N / 256);
    dim3 block(256);
    hipLaunchKernelGGL(saxpy, dim3(grid), dim3(block), 0, 0, 2.0f, dx, dy, N);

    float* out = nullptr;
    hipMalloc((void**)&out, sizeof(float));
    hipLaunchKernelGGL(sum_reduce, dim3(1), dim3(32), 0, 0, dx, out, N);

    hipDeviceSynchronize();
    hipFree(dx);
    hipFree(dy);
    hipFree(out);
    return 0;
}