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# Copyright 2013-2021 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 import *
class NetlibXblas(AutotoolsPackage):
"""XBLAS is a reference implementation for extra precision BLAS.
XBLAS is a reference implementation for the dense and banded BLAS
routines, along with extended and mixed precision version. Extended
precision is only used internally; input and output arguments remain
the same as in the existing BLAS. Extra precisions is implemented as
double-double (i.e., 128-bit total, 106-bit significand). Mixed
precision permits some input/output arguments of different types
(mixing real and complex) or precisions (mixing single and
double). This implementation is proof of concept, and no attempt was
made to optimize performance; performance should be as good as
straightforward but careful code written by hand."""
homepage = "https://www.netlib.org/xblas"
url = "https://www.netlib.org/xblas/xblas.tar.gz"
version('1.0.248', sha256='b5fe7c71c2da1ed9bcdc5784a12c5fa9fb417577513fe8a38de5de0007f7aaa1')
variant('fortran', default=True,
description='Build Fortran interfaces')
variant('plain_blas', default=True,
description='As part of XBLAS, build plain BLAS routines')
provides('blas', when='+plain_blas')
@property
def libs(self):
return find_libraries(['libxblas'], root=self.prefix,
shared=False, recursive=True)
def configure_args(self):
args = []
if self.spec.satisfies('~fortran'):
args += ['--disable-fortran']
if self.spec.satisfies('~plain_blas'):
args += ['--disable-plain-blas']
return args
def install(self, spec, prefix):
mkdirp(prefix.lib)
install('libxblas.a', prefix.lib)
if self.spec.satisfies('+plain_blas'):
# XBLAS should be a drop-in BLAS replacement
install('libxblas.a', join_path(prefix.lib, 'libblas.a'))
headers = ['f2c-bridge.h',
'blas_dense_proto.h',
'blas_enum.h',
'blas_extended.h',
'blas_extended_private.h',
'blas_extended_proto.h',
'blas_fpu.h',
'blas_malloc.h']
mkdirp(prefix.include)
for h in headers:
install(join_path('src', h), prefix.include)
return
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