NVIDIA CUDA

140 Module DocumentationFor device pointers, the starting address isCUdeviceptr dstStart = dstDevice+dstY*dstPitch+dstXInBytes;For CUDA arrays, dstXInBytes must be evenly divisible by the array element size.• WidthInBytes and Height specify the width (in bytes) and height of the 2D copy being performed. Any pitchesmust be greater than or equal to WidthInBytes.cuMemcpy2D() returns an error if any pitch is greater than the maximum allowed (CU_DEVICE_ATTRIBUTE_-MAX_PITCH). cuMemAllocPitch() passes back pitches that always work with cuMemcpy2D(). On intra-devicememory copies (device ? device, CUDA array ? device, CUDA array ? CUDA array), cuMemcpy2D() may failfor pitches not computed by cuMemAllocPitch(). cuMemcpy2DUnaligned() does not have this restriction, butmay run significantly slower in the cases where cuMemcpy2D() would have returned an error code.cuMemcpy2DAsync() is asynchronous and can optionally be associated to a stream by passing a non-zero hStreamargument. It only works on page-locked host memory and returns an error if a pointer to pageable memory is passedas input.Parameters:pCopy - Parameters for the memory copyhStream - Stream identifierReturns:Note:CUDA_SUCCESS, CUDA_ERROR_DEINITIALIZED, CUDA_ERROR_NOT_INITIALIZED, CUDA_-ERROR_INVALID_CONTEXT, CUDA_ERROR_INVALID_VALUESee also:Note that this function may also return error codes from previous, asynchronous launches.cuArray3DCreate, cuArray3DGetDescriptor, cuArrayCreate, cuArrayDestroy, cuArrayGetDescriptor, cuMemAlloc,cuMemAllocHost, cuMemAllocPitch, cuMemcpy2D, cuMemcpy2DUnaligned, cuMemcpy3D, cuMemcpy3DAsync,cuMemcpyAtoA, cuMemcpyAtoD, cuMemcpyAtoH, cuMemcpyAtoHAsync, cuMemcpyDtoA,cuMemcpyDtoD, cuMemcpyDtoH, cuMemcpyDtoHAsync, cuMemcpyHtoA, cuMemcpyHtoAAsync,cuMemcpyHtoD, cuMemcpyHtoDAsync, cuMemFree, cuMemFreeHost, cuMemGetAddressRange, cuMemGet-Info, cuMemHostAlloc, cuMemHostGetDevicePointer, cuMemsetD2D8, cuMemsetD2D16, cuMemsetD2D32,cuMemsetD8, cuMemsetD16, cuMemsetD323.25.2.11 CUresult cuMemcpy2DUnaligned (const CUDA_MEMCPY2D ∗ pCopy)Perform a 2D memory copy according to the parameters specified in pCopy. The CUDA_MEMCPY2D structure isdefined as:typedef struct CUDA_MEMCPY2D_st {unsigned int srcXInBytes, srcY;CUmemorytype srcMemoryType;const void *srcHost;Generated on Wed Apr 1 16:11:42 2009 for NVIDIA CUDA Library by Doxygen