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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 *
from spack.error import SpackError
from spack.pkg.builtin.fftw import FftwBase
def target_check(spec):
if spec.target != "a64fx":
error_msg = ("It can only be built on an A64FX machine.\n")
raise SpackError(error_msg)
class FujitsuFftw(FftwBase):
"""FFTW (Fujitsu Optimized version) is a comprehensive collection of
fast C routines for computing the Discrete Fourier Transform (DFT)
and various special cases thereof.
It is an open-source implementation of the Fast Fourier transform
algorithm. It can compute transforms of real and complex-values
arrays of arbitrary size and dimension.
Fujitsu Optimized FFTW is the optimized FFTW implementation targeted
for A64FX CPUs.
For single precision build, please use precision value as float.
Example : spack install fujitsufftw precision=float
"""
_name = 'fujitsu-fftw'
homepage = "https://github.com/fujitsu/fftw3"
url = "https://github.com/fujitsu/fftw3/archive/sve-v1.0.0.tar.gz"
version('1.0.0', sha256='b5931e352355d8d1ffeb215922f4b96de11b8585c423fceeaffbf3d5436f6f2f')
variant('shared', default=True, description='Builds a shared version of the library')
variant('openmp', default=True, description="Enable OpenMP support")
variant('debug', default=False, description='Builds a debug version of the library')
depends_on('texinfo')
provides('fftw-api@3')
conflicts('precision=quad', when='%fj', msg="Fujitsu Compiler doesn't support quad precision")
conflicts('precision=long_double', when='%fj', msg="ARM-SVE vector instructions only works in single or double precision")
conflicts('%arm')
conflicts('%cce')
conflicts('%apple-clang')
conflicts('%clang')
conflicts('%gcc')
conflicts('%intel')
conflicts('%nag')
conflicts('%pgi')
conflicts('%xl')
conflicts('%xl_r')
def autoreconf(self, spec, prefix):
if spec.target != "a64fx":
target_check(spec)
touch = which('touch')
touch('ChangeLog')
autoreconf = which('autoreconf')
autoreconf('-ifv')
def configure(self, spec, prefix):
"""Configure function"""
# Base options
options = [
'CFLAGS=-Ofast',
'FFLAGS=-Kfast',
'--enable-sve',
'--enable-armv8-cntvct-el0',
'--enable-fma',
'--enable-fortran',
'--prefix={0}'.format(prefix),
'ac_cv_prog_f77_v=-###'
]
if '+shared' in spec:
options.append('--enable-shared')
else:
options.append('--disable-shared')
if '+openmp' in spec:
options.append('--enable-openmp')
options.append('OPENMP_CFLAGS=-Kopenmp')
else:
options.append('--disable-openmp')
if '+mpi' in spec:
options.append('--enable-mpi')
else:
options.append('--disable-mpi')
# 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[:]
with working_dir(precision, create=True):
configure(*opts)
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