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# Copyright 2013-2020 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)
import os
import os.path
import llnl.util.lang
from spack import *
class Fftw(AutotoolsPackage):
"""FFTW is a C subroutine library for computing the discrete Fourier
transform (DFT) in one or more dimensions, of arbitrary input
size, and of both real and complex data (as well as of even/odd
data, i.e. the discrete cosine/sine transforms or DCT/DST). We
believe that FFTW, which is free software, should become the FFT
library of choice for most applications."""
homepage = "http://www.fftw.org"
url = "http://www.fftw.org/fftw-3.3.4.tar.gz"
list_url = "http://www.fftw.org/download.html"
version('3.3.8', sha256='6113262f6e92c5bd474f2875fa1b01054c4ad5040f6b0da7c03c98821d9ae303')
version('3.3.7', sha256='3b609b7feba5230e8f6dd8d245ddbefac324c5a6ae4186947670d9ac2cd25573')
version('3.3.6-pl2', sha256='a5de35c5c824a78a058ca54278c706cdf3d4abba1c56b63531c2cb05f5d57da2')
version('3.3.5', sha256='8ecfe1b04732ec3f5b7d279fdb8efcad536d555f9d1e8fabd027037d45ea8bcf')
version('3.3.4', sha256='8f0cde90929bc05587c3368d2f15cd0530a60b8a9912a8e2979a72dbe5af0982')
version('2.1.5', sha256='f8057fae1c7df8b99116783ef3e94a6a44518d49c72e2e630c24b689c6022630')
patch('pfft-3.3.5.patch', when="@3.3.5:+pfft_patches", level=0)
patch('pfft-3.3.4.patch', when="@3.3.4+pfft_patches", level=0)
patch('pgi-3.3.6-pl2.patch', when="@3.3.6-pl2%pgi", level=0)
variant(
'precision', values=any_combination_of(
'float', 'double', 'long_double', 'quad'
).prohibit_empty_set().with_default('float,double'),
description='Build the selected floating-point precision libraries'
)
variant('openmp', default=False, description="Enable OpenMP support.")
variant('mpi', default=True, description='Activate MPI support')
variant(
'pfft_patches', default=False,
description='Add extra transpose functions for PFFT compatibility')
depends_on('mpi', when='+mpi')
depends_on('automake', type='build', when='+pfft_patches')
depends_on('autoconf', type='build', when='+pfft_patches')
depends_on('libtool', type='build', when='+pfft_patches')
# https://github.com/FFTW/fftw3/commit/902d0982522cdf6f0acd60f01f59203824e8e6f3
conflicts('%gcc@8:8.9999', when="@3.3.7")
conflicts('precision=long_double', when='@2.1.5',
msg='Long double precision is not supported in FFTW 2')
conflicts('precision=quad', when='@2.1.5',
msg='Quad precision is not supported in FFTW 2')
conflicts('+openmp', when='%apple-clang', msg="Apple's clang does not support OpenMP")
provides('fftw-api@2', when='@2.1.5')
provides('fftw-api@3', when='@3:')
@property
def libs(self):
# Reduce repetitions of entries
query_parameters = list(llnl.util.lang.dedupe(
self.spec.last_query.extra_parameters
))
# List of all the suffixes associated with float precisions
precisions = [
('float', 'f'),
('double', ''),
('long_double', 'l'),
('quad', 'q')
]
# Retrieve the correct suffixes, or use double as a default
suffixes = [v for k, v in precisions if k in query_parameters] or ['']
# Construct the list of libraries that needs to be found
libraries = []
for sfx in suffixes:
if 'mpi' in query_parameters and '+mpi' in self.spec:
libraries.append('libfftw3' + sfx + '_mpi')
if 'openmp' in query_parameters and '+openmp' in self.spec:
libraries.append('libfftw3' + sfx + '_omp')
libraries.append('libfftw3' + sfx)
return find_libraries(libraries, root=self.prefix, recursive=True)
def patch(self):
# If fftw/config.h exists in the source tree, it will take precedence
# over the copy in build dir. As only the latter has proper config
# for our build, this is a problem. See e.g. issue #7372 on github
if os.path.isfile('fftw/config.h'):
os.rename('fftw/config.h', 'fftw/config.h.SPACK_RENAMED')
def autoreconf(self, spec, prefix):
if '+pfft_patches' in spec:
autoreconf = which('autoreconf')
autoreconf('-ifv')
@property
def selected_precisions(self):
"""Precisions that have been selected in this build"""
return self.spec.variants['precision'].value
def configure(self, spec, prefix):
# Base options
options = [
'--prefix={0}'.format(prefix),
'--enable-shared',
'--enable-threads'
]
if not self.compiler.f77 or not self.compiler.fc:
options.append("--disable-fortran")
if spec.satisfies('@:2'):
options.append('--enable-type-prefix')
# Variants that affect every precision
if '+openmp' in spec:
options.append('--enable-openmp')
if spec.satisfies('@:2'):
# TODO: libtool strips CFLAGS, so 2.x libxfftw_threads
# isn't linked to the openmp library. Patch Makefile?
options.insert(0, 'CFLAGS=' + self.compiler.openmp_flag)
if '+mpi' in spec:
options.append('--enable-mpi')
# Specific SIMD support.
# all precisions
simd_features = ['sse2', 'avx', 'avx2', 'avx512', 'avx-128-fma',
'kcvi', 'vsx', 'neon']
# float only
float_simd_features = ['altivec', 'sse']
simd_options = []
for feature in simd_features:
msg = '--enable-{0}' if feature in spec.target else '--disable-{0}'
simd_options.append(msg.format(feature))
# If no features are found, enable the generic ones
if not any(f in spec.target for f in
simd_features + float_simd_features):
simd_options += [
'--enable-generic-simd128',
'--enable-generic-simd256'
]
simd_options += [
'--enable-fma' if 'fma' in spec.target else '--disable-fma'
]
# Double is the default precision, for all the others we need
# to enable the corresponding option.
enable_precision = {
'float': ['--enable-float'],
'double': None,
'long_double': ['--enable-long-double'],
'quad': ['--enable-quad-precision']
}
# Different precisions must be configured and compiled one at a time
configure = Executable('../configure')
for precision in self.selected_precisions:
opts = (enable_precision[precision] or []) + options[:]
# SIMD optimizations are available only for float and double
# starting from FFTW 3
if precision in ('float', 'double') and spec.satisfies('@3:'):
opts += simd_options
# float-only acceleration
if precision == 'float':
for feature in float_simd_features:
if feature in spec.target:
msg = '--enable-{0}'
else:
msg = '--disable-{0}'
opts.append(msg.format(feature))
with working_dir(precision, create=True):
configure(*opts)
def for_each_precision_make(self, *targets):
for precision in self.selected_precisions:
with working_dir(precision):
make(*targets)
def build(self, spec, prefix):
self.for_each_precision_make()
def check(self):
self.for_each_precision_make('check')
def install(self, spec, prefix):
self.for_each_precision_make('install')
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