# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

from spack.package import *


class Cutlass(CMakePackage, CudaPackage):
    """CUDA Templates for Linear Algebra Subroutines"""

    homepage = "https://github.com/NVIDIA/cutlass"
    git = homepage + ".git"
    url = "https://github.com/NVIDIA/cutlass/archive/refs/tags/v2.9.0.tar.gz"

    version('master', branch='master')
    version(
        '2.9.1', sha256="2d6474576c08ee21d7f4f3a10fd1a47234fd9fd638efc8a2e0e64bb367f09bc1")
    version(
        '2.9.0', sha256="ccca4685739a3185e3e518682845314b07a5d4e16d898b10a3c3a490fd742fb4")
    variant('cuda', default=True, description='Build with CUDA')
    conflicts('~cuda', msg='Cutlass requires CUDA')
    conflicts('cuda_arch=none',
              msg='Must specify CUDA compute capabilities of your GPU, see '
              'https://developer.nvidia.com/cuda-gpus')

    def setup_build_environment(self, env):
        env.set('CUDACXX', self.spec["cuda"].prefix.bin.nvcc)

    def cmake_args(self):
        cuda_arch = self.spec.variants['cuda_arch'].value
        return [self.define("CUTLASS_NVCC_ARCHS", ";".join(cuda_arch))]