dfukalov
44 строки
1.2 KiB
Plaintext
44 строки
1.2 KiB
Plaintext
// RUN: hipify "%s" 2>&1 | FileCheck %s
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#include <helper_cuda.h> // for checkCudaErrors
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#include <iostream>
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__global__ void axpy(float a, float* x, float* y) {
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// CHECK: hipThreadIdx_x
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y[threadIdx.x] = a * x[threadIdx.x];
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}
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int main(int argc, char* argv[]) {
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const int kDataLen = 4;
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float a = 2.0f;
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float host_x[kDataLen] = {1.0f, 2.0f, 3.0f, 4.0f};
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float host_y[kDataLen];
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// Copy input data to device.
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float* device_x;
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float* device_y;
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checkCudaErrors(cudaMalloc(&device_x, kDataLen * sizeof(float)));
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checkCudaErrors(cudaMalloc(&device_y, kDataLen * sizeof(float)));
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checkCudaErrors(cudaMemcpy(device_x, host_x, kDataLen * sizeof(float),
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cudaMemcpyHostToDevice));
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// Launch the kernel.
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// CHECK: hipLaunchKernel(HIP_KERNEL_NAME
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axpy<<<1, kDataLen>>>(a, device_x, device_y);
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// Copy output data to host.
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checkCudaErrors(cudaDeviceSynchronize());
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checkCudaErrors(cudaMemcpy(host_y, device_y, kDataLen * sizeof(float),
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cudaMemcpyDeviceToHost));
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// Print the results.
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for (int i = 0; i < kDataLen; ++i) {
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std::cout << "y[" << i << "] = " << host_y[i] << "\n";
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}
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checkCudaErrors(cudaDeviceReset());
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return 0;
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}
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