private static void Run_M_V_float(TSCudaContext context, Tensor result, Tensor mat, Tensor vec)
{
// Require lhs to be row-major. This means we must tell BLAS to transpose it (BLAS expects column-major matrices)
if (mat.Strides[1] != 1)
{
throw new ArgumentException("lhs must be contiguous in the last dimension");
}
using (Util.PooledObject <CudaBlas> blas = context.BlasForTensor(mat))
{
ManagedCuda.BasicTypes.CUdeviceptr yPtr = CudaHelpers.GetBufferStart(result);
ManagedCuda.BasicTypes.CUdeviceptr aPtr = CudaHelpers.GetBufferStart(mat);
ManagedCuda.BasicTypes.CUdeviceptr xPtr = CudaHelpers.GetBufferStart(vec);
Operation trans = Operation.Transpose;
int m = (int)mat.Sizes[1];
int n = (int)mat.Sizes[0];
int incx = (int)vec.Strides[0];
int lda = (int)mat.Strides[0];
int incy = (int)result.Strides[0];
float alpha = 1;
float beta = 0;
CudaBlasNativeMethods.cublasSgemv_v2(blas.Value.CublasHandle, trans, m, n, ref alpha, aPtr, lda, xPtr, incx, ref beta, yPtr, incy);
}
}
private static void Run_Dot_float(TSCudaContext context, Tensor result, Tensor lhs, Tensor rhs)
{
using (Util.PooledObject <CudaBlas> blas = context.BlasForTensor(lhs))
{
//var resultPtr = CudaNativeHelpers.GetBufferStart(result);
CUdeviceptr lhsPtr = CudaHelpers.GetBufferStart(lhs);
CUdeviceptr rhsPtr = CudaHelpers.GetBufferStart(rhs);
int n = (int)lhs.Sizes[0];
int incx = (int)lhs.Strides[0];
int incy = (int)rhs.Strides[0];
float resultVal = 0;
CublasStatus _status = CudaBlasNativeMethods.cublasSdot_v2(blas.Value.CublasHandle, n, lhsPtr, incx, rhsPtr, incy, ref resultVal);
if (_status != CublasStatus.Success)
{
throw new CudaBlasException(_status);
}
result.Storage.SetElementAsFloat(result.StorageOffset, resultVal);
}
}
private static void GemmOpBatch(TSCudaContext context, BlasOp transA, BlasOp transB, float alpha, Tensor a, Tensor b, float beta, Tensor c)
{
if (a.Strides[1] != 1)
{
throw new ArgumentException($"a must be contiguous in the first dimension (column major / fortran order). ({a.Strides[0]},{a.Strides[1]}) ({b.Strides[0]},{b.Strides[1]}) ({c.Strides[0]},{c.Strides[1]})");
}
if (b.Strides[1] != 1)
{
throw new ArgumentException("b must be contiguous in the first dimension (column major / fortran order)");
}
if (c.Strides[1] != 1)
{
throw new ArgumentException($"c must be contiguous in the first dimension (column major / fortran order) ({a.Strides[0]}, {a.Strides[1]}, {a.Strides[2]}) ({b.Strides[0]}, {b.Strides[1]}, {b.Strides[2]}) ({c.Strides[0]}, {c.Strides[1]}, {c.Strides[2]})");
}
using (Util.PooledObject <CudaBlas> blas = context.BlasForTensor(c))
{
bool nta = transA == BlasOp.NonTranspose;
bool ntb = transB == BlasOp.NonTranspose;
Operation transa = GetCudaBlasOp(transA);
Operation transb = GetCudaBlasOp(transB);
int m = (int)a.Sizes[nta ? 1 : 2];
int k = (int)b.Sizes[ntb ? 1 : 2];
int n = (int)b.Sizes[ntb ? 2 : 1];
int lda = (int)a.Strides[2];
int ldb = (int)b.Strides[2];
int ldc = (int)c.Strides[2];
int stra = (int)a.Strides[0];
int strb = (int)b.Strides[0];
int strc = (int)c.Strides[0];
int batchSize = (int)c.Sizes[0];
if (c.ElementType == DType.Float32)
{
CUdeviceptr aPtrSingle = CudaHelpers.GetBufferStart(a);
CUdeviceptr bPtrSingle = CudaHelpers.GetBufferStart(b);
CUdeviceptr cPtrSingle = CudaHelpers.GetBufferStart(c);
CublasStatus _statusF32 = CudaBlasNativeMethods.cublasSgemmStridedBatched(blas.Value.CublasHandle,
transa, transb, m, n, k, ref alpha, aPtrSingle, lda, stra, bPtrSingle, ldb, strb, ref beta, cPtrSingle, ldc, strc, batchSize);
if (_statusF32 != CublasStatus.Success)
{
throw new CudaBlasException(_statusF32);
}
}
else if (c.ElementType == DType.Float64)
{
CUdeviceptr aPtrDouble = CudaHelpers.GetBufferStart(a);
CUdeviceptr bPtrDouble = CudaHelpers.GetBufferStart(b);
CUdeviceptr cPtrDouble = CudaHelpers.GetBufferStart(c);
double alphaDouble = alpha;
double betaDouble = beta;
CublasStatus _statusF64 = CudaBlasNativeMethods.cublasDgemmStridedBatched(blas.Value.CublasHandle,
transa, transb, m, n, k, ref alphaDouble, aPtrDouble, lda, stra, bPtrDouble, ldb, strb, ref betaDouble, cPtrDouble, ldc, strc, batchSize);
if (_statusF64 != CublasStatus.Success)
{
throw new CudaBlasException(_statusF64);
}
}
else
{
throw new NotSupportedException("CUDA GEMM with element type " + c.ElementType + " not supported");
}
}
}
