Module: Numo::Linalg::Loader

Defined in:
lib/numo/linalg/loader.rb

Constant Summary

@@libs = 
nil

Class Method Summary collapse

Class Method Details

.dlopen(recvr, base, dir = nil, ver = nil) ⇒ Object 



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# File 'lib/numo/linalg/loader.rb', line 15

def dlopen(recvr,base,dir=nil,ver=nil)
  if dir && !dir.empty?
    base = File.join(dir,base)
  end
  if ver && EXT=='so'
    begin
      path = "#{base}.#{EXT}.#{ver}"
      recvr.send(:dlopen,path)
      return path
    rescue
    end
  end
  path = "#{base}.#{EXT}"
  recvr.send(:dlopen,path)
  path
end

.libs ⇒ Object 



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# File 'lib/numo/linalg/loader.rb', line 11

def libs
  @@libs
end

.load_atlas(*dirs, exc: true) ⇒ Object 



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# File 'lib/numo/linalg/loader.rb', line 95

def load_atlas(*dirs,exc:true)
  if dirs.empty?
    dirs = [ATLAS_LIBPATH,""].compact
  end
  dirs.each do |d|
    %w[ libtatlas
        libatlas
        libsatlas ].each do |f|
      begin
        f_atlas = dlopen(Fiddle,f,d,3)
        f_atlas = dlopen(Blas,f,d,3)
        f_lapacke = dlopen(Lapack,"liblapacke",LAPACK_LIBPATH,3)
        @@libs = [ f_atlas, f_lapacke ]
        if $DEBUG
          $stderr.puts "Numo::Linalg: use #{f}"
        end
        return true
      rescue
      end
    end
  end
  if exc
    raise RuntimeError, "cannot find ATLAS library"
  end
  false
end

.load_lapack(*dirs, exc: true) ⇒ Object 



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# File 'lib/numo/linalg/loader.rb', line 122

def load_lapack(*dirs,exc:true)
  if dirs.empty?
    b = BLAS_LIBPATH || LAPACK_LIBPATH
    l = LAPACK_LIBPATH || BLAS_LIBPATH
    dirs = (b ? [[b,l]] : []) + ["",""]
  end
  dirs.each do |arg|
    b,l = *arg
    l = b if l.nil?
    begin
      f_blas = dlopen(Fiddle,"libblas",b,3)
      f_lapack = dlopen(Fiddle,"liblapack",l,3)
      f_cblas = dlopen(Blas,"libcblas",b,3)
      f_lapacke = dlopen(Lapack,"liblapacke",l,3)
      @@libs = [ f_blas, f_lapack, f_cblas, f_lapacke ]
      if $DEBUG
        $stderr.puts "Numo::Linalg: use #{f_blas} and #{f_lapack}"
      end
      return true
    rescue
    end
  end
  if exc
    raise RuntimeError, "cannot find BLAS/LAPABK library"
  end
  false
end

.load_library ⇒ Object

Raises:

  • (RuntimeError) 


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# File 'lib/numo/linalg/loader.rb', line 150

def load_library
  case BACKEND
  when /mkl/i         ; return if load_mkl(exc:false)
  when /^openblas/i   ; return if load_openblas(exc:false)
  when /^atlas/i      ; return if load_atlas(exc:false)
  when /lapack|blas/i ; return if load_lapack(exc:false)
  else
    return if load_mkl(exc:false)
    return if load_openblas(exc:false)
    return if load_atlas(exc:false)
    return if load_lapack(exc:false)
  end
  raise RuntimeError, "cannot find backend library for Numo::Linalg"
end

.load_mkl(*dirs, exc: true) ⇒ Object 



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# File 'lib/numo/linalg/loader.rb', line 33

def load_mkl(*dirs,exc:true)
  if dirs.empty?
    dirs = [MKL_LIBPATH,""].compact
  end
  dirs.each do |d|
    if d.empty?
      d = e = nil
    else
      e = d.sub(/\/mkl\//, "/")
    end
    begin
      f_iomp5 = dlopen(Fiddle,"libiomp5",e)
      f_mkl_core = dlopen(Fiddle,"libmkl_core",d)
      f_intel_thread = dlopen(Fiddle,"libmkl_intel_thread",d)
      f_intel_lp64 = dlopen(Blas,"libmkl_intel_lp64",d)
      f_intel_lp64 = dlopen(Lapack,"libmkl_intel_lp64",d)
      @@libs = [ f_iomp5, f_mkl_core, f_intel_thread, f_intel_lp64 ]
      if $DEBUG
        $stderr.puts "Numo::Linalg: use #{f_intel_lp64}"
      end
      return true
    rescue
    end
  end
  if exc
    raise RuntimeError, "cannot find MKL library"
  end
  false
end

.load_openblas(*dirs, exc: true) ⇒ Object 



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# File 'lib/numo/linalg/loader.rb', line 63

def load_openblas(*dirs,exc:true)
  if dirs.empty?
    dirs = [OPENBLAS_LIBPATH,""].compact
  end
  dirs.each do |d|
    %w[ libopenblaso
        libopenblasp
        libopenblas  ].each do |f|
      begin
        f_openblas = dlopen(Blas,f,d,0)
        f_openblas = dlopen(Fiddle,f,d,0)
        f_lapacke = nil
        begin
          f_lapacke = dlopen(Lapack,"liblapacke",d,3)
        rescue
          f_openblas = dlopen(Lapack,f,d,0)
        end
        @@libs = [ f_openblas, f_lapacke ].compact
        if $DEBUG
          $stderr.puts "Numo::Linalg: use #{f}"
        end
        return true
      rescue
      end
    end
  end
  if exc
    raise RuntimeError, "cannot find OpenBLAS library"
  end
  false
end