pub unsafe fn dgemv(
handle: cublasHandle_t,
trans: cublasOperation_t,
m: c_int,
n: c_int,
alpha: *const f64,
a: CUdeviceptr,
lda: c_int,
x: CUdeviceptr,
incx: c_int,
beta: *const f64,
y: CUdeviceptr,
incy: c_int,
) -> Result<(), GpuError>