;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Fis Trivial <ybbs.daans@hotmail.com>
;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages opencl)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system cmake)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (gnu packages)
  #:use-module (gnu packages autotools)
  #:use-module (gnu packages gl)
  #:use-module (gnu packages gnupg)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages libedit)
  #:use-module (gnu packages llvm)
  #:use-module (gnu packages mpi)
  #:use-module (gnu packages ncurses)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages python)
  #:use-module (gnu packages ruby)
  #:use-module (gnu packages video)
  #:use-module (gnu packages xdisorg)
  #:use-module (gnu packages xorg))

;; This file adds OpenCL implementation related packages. Due to the fact that
;; OpenCL devices like GPU are not available during build (store environment),
;; tests that require such devices are all disabled.
;; Check https://lists.gnu.org/archive/html/guix-devel/2018-04/msg00293.html

(define (make-opencl-headers major-version subversion)
  (let ((commit "e986688daf750633898dfd3994e14a9e618f2aa5")
        (revision "0"))
    (package
      (name "opencl-headers")
      (version (git-version
                (string-append major-version "." subversion ".0")
                revision commit))
      (source (origin
                (method git-fetch)
                (uri (git-reference
                      (url "https://github.com/KhronosGroup/OpenCL-Headers.git")
                      (commit commit)))
                (file-name (git-file-name name version))
                (sha256
                 (base32
                  "176ydpbyws5nr4av6hf8p41pkhc0rc4m4vrah9w6gp2fw2i32838"))))
      (build-system gnu-build-system)
      (arguments
       `(#:phases
         (modify-phases %standard-phases
           (delete 'configure)
           (delete 'build)
           (delete 'check)
           (replace 'install
             (lambda* (#:key outputs #:allow-other-keys)
               (copy-recursively (string-append "./opencl" (string-append
                                                            ,major-version
                                                            ,subversion) "/CL")
                                 (string-append
                                  (assoc-ref outputs "out")
                                  "/include/CL")))))))
      (synopsis "The Khronos OpenCL headers")
      (description
       "This package provides the C headers by Khronos for OpenCL
programming.")
      (home-page "https://www.khronos.org/registry/OpenCL/")
      (license license:expat))))

(define-public opencl-headers-2.2
  (make-opencl-headers "2" "2"))
(define-public opencl-headers-2.1
  (make-opencl-headers "2" "1"))
(define-public opencl-headers-2.0
  (make-opencl-headers "2" "0"))
(define-public opencl-headers-1.2
  (make-opencl-headers "1" "2"))
(define-public opencl-headers-1.1
  (make-opencl-headers "1" "1"))
(define-public opencl-headers-1.0
  (make-opencl-headers "1" "0"))

(define-public opencl-headers opencl-headers-2.2)

(define-public opencl-clhpp
  (package
    (name "opencl-clhpp")
    (version "2.0.10")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/KhronosGroup/OpenCL-CLHPP.git")
             (commit (string-append "v" version))))
       (sha256
        (base32 "0h5kpg5cl8wzfnqmv6i26aig2apv06ffm9p3rh35938n9r8rladm"))
       (file-name (git-file-name name version))))
    (native-inputs
     `(("python" ,python-wrapper)))
    (propagated-inputs
     `(("opencl-headers" ,opencl-headers)))
    (arguments
     `(#:configure-flags
       (let ((out (assoc-ref %outputs "out")))
         (list
          "-DBUILD_EXAMPLES=OFF"
          "-DBUILD_TESTS=OFF"
          (string-append "-DCMAKE_INSTALL_PREFIX="
                         (assoc-ref %outputs "out")
                         "/include")))
       ;; The regression tests require a lot more dependencies.
       #:tests? #f))
    (build-system cmake-build-system)
    (home-page "http://github.khronos.org/OpenCL-CLHPP/")
    (synopsis "Khronos OpenCL-CLHPP")
    (description
     "This package provides the @dfn{host API} C++ headers for OpenCL.")
    (license license:expat)))

(define-public ocl-icd
  (package
    (name "ocl-icd")
    (version "2.2.12")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://forge.imag.fr/frs/download.php/836/ocl-icd-"
                    version ".tar.gz"))
              (file-name (string-append name "-" version ".tar.gz"))
              (sha256
               (base32
                "1x2dr8p4dkfds56r38av360i3nv1y3326jmshxvjngaf6mlg6rbn"))
              (modules '((guix build utils)))
              (snippet
               '(delete-file-recursively "khronos-headers"))))
    (native-inputs
     `(("opencl-headers" ,opencl-headers)
       ("ruby" ,ruby)))
    (inputs
     `(("libgcrypt" ,libgcrypt)))
    (build-system gnu-build-system)
    (arguments
     '(#:configure-flags '("DEBUG_OCL_ICD=1")))
    (native-search-paths
     (list (search-path-specification
            (variable "OPENCL_VENDOR_PATH")
            (files '("etc/OpenCL/vendors")))))
    (search-paths native-search-paths)
    (home-page "https://forge.imag.fr/projects/ocl-icd/")
    (synopsis "OpenCL loader for Installable Client Drivers (ICDs)")
    (description
     "OpenCL implementations are provided as ICDs (Installable Client
Drivers).  An OpenCL program can use several ICDs thanks to the use of an ICD
Loader as provided by this package.")
    (license license:bsd-2)))

(define-public clinfo
  (package
    (name "clinfo")
    (version "2.2.18.04.06")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/Oblomov/clinfo.git")
             (commit version)))
       (file-name (git-file-name name version))
       (sha256
        (base32 "0y2q0lz5yzxy970b7w7340vp4fl25vndahsyvvrywcrn51ipgplx"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("opencl-headers" ,opencl-headers)))
    (inputs
     `(("ocl-icd" ,ocl-icd)))
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (delete 'configure)
         (replace 'build
           (lambda _
             (let ((cores (number->string (parallel-job-count))))
               (setenv "CC" "gcc")
               (invoke "make" "-j" cores))))
         (replace 'install
           (lambda* (#:key outputs #:allow-other-keys)
             (invoke "make" "install" (string-append
                                       "PREFIX="
                                       (assoc-ref outputs "out"))))))
       #:tests? #f))
    (home-page "https://github.com/Oblomov/clinfo")
    (synopsis "Print information about OpenCL platforms and devices")
    ;; Only the implementation installed via Guix will be detected.
    (description
     "This package provides the @command{clinfo} command that enumerates all
possible (known) properties of the OpenCL platform and devices available on
the system.")
    (license license:cc0)))

(define-public beignet
  (package
    (name "beignet")
    (version "1.3.2")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/intel/beignet.git")
             (commit (string-append "Release_v" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32 "0lpv3lvi2vrmzb8blflrpbd3jgin76zqmz6jcv17vn9mylqdrfnd"))
       (patches (search-patches "beignet-correct-file-names.patch"))
       (modules '((guix build utils)))
       (snippet
        ;; There's a suspicious .isa binary file under kernels/.
        ;; Remove it.
        '(for-each delete-file (find-files "." "\\.isa$")))))
    (native-inputs `(("pkg-config" ,pkg-config)
                     ("python" ,python)))
    (inputs `(("clang@3.7" ,clang-3.7)
              ("clang-runtime@3.7" ,clang-runtime-3.7)
              ("glu" ,glu)
              ("llvm@3.7" ,llvm-3.7)
              ("libdrm" ,libdrm)
              ("libedit" ,libedit)
              ("libpthread-stubs", libpthread-stubs)
              ("libsm" ,libsm)
              ("libva" ,libva)
              ("libxfixes" ,libxfixes)
              ("libxext" ,libxext)
              ("mesa-utils" ,mesa-utils)
              ("ncurses" ,ncurses)
              ("ocl-icd" ,ocl-icd)
              ("opencl-headers" ,opencl-headers)
              ("xextproto" ,xextproto)
              ("zlib" ,zlib)))
    (build-system cmake-build-system)
    (arguments
     `(#:configure-flags
       (list (string-append "-DCLANG_LIBRARY_DIR="
                            (assoc-ref %build-inputs "clang@3.7") "/lib")
             "-DENABLE_GL_SHARING=ON"
             "-DEXPERIMENTAL_DOUBLE=ON")

       #:phases
       (modify-phases %standard-phases
         (add-after 'install 'remove-headers
           (lambda* (#:key outputs #:allow-other-keys)
             (let ((out (assoc-ref outputs "out")))
               (delete-file-recursively
                (string-append out "/include"))
               #t)))
         (add-after 'remove-headers 'install-kernels
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (builddir (getcwd))
                    (source-dir (string-append
                                 builddir
                                 "/../beignet-Release_v1.3.2/kernels")))
               (copy-recursively source-dir
                                 (string-append out "/lib/beignet/kernels"))
               #t))))
       ;; Beignet tries to find GPU when running tests, which is not available
       ;; during build.
       #:tests? #f))
    (home-page "https://wiki.freedesktop.org/www/Software/Beignet/")
    (synopsis "OpenCL framework for Intel GPUs")
    (description
     "Beignet is an implementation of the OpenCL specification.  This code
base contains the code to run OpenCL programs on Intel GPUs---IvyBridge,
Haswell, Skylake, Apollolake, etc.  It defines and implements the OpenCL host
functions required to initialize the device, create the command queues, the
kernels and the programs, and run them on the GPU.  The code also contains a
back-end for the LLVM compiler framework.")
    (license license:lgpl2.1+)))

(define-public pocl
  (package
    (name "pocl")
    (version "1.2")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/pocl/pocl.git")
             (commit (string-append "v" version))))
       (sha256
        (base32 "0fyiwd9nrqhl0jsac0bx17p9acpfzhyxp50mmp28mzn7psb9qidg"))
       (file-name (git-file-name name version))))
    (build-system cmake-build-system)
    (native-inputs
     `(("libltdl" ,libltdl)
       ("pkg-config" ,pkg-config)))
    (inputs
     `(("clang" ,clang)
       ("hwloc" ,hwloc-2.0 "lib")
       ("llvm" ,llvm)
       ("ocl-icd" ,ocl-icd)))
    (arguments
     `(#:configure-flags
       (list "-DENABLE_ICD=ON"
             "-DENABLE_TESTSUITES=ON"
             ;; We are not developers, don't run conformance suite.
             "-DENABLE_CONFORMANCE=OFF"
             (string-append "-DEXTRA_HOST_LD_FLAGS=-L"
                            (assoc-ref %build-inputs "libc") "/lib"))
       #:phases
       (modify-phases %standard-phases
         (add-before 'check 'set-HOME
           (lambda _
             (setenv "HOME" "/tmp")
             #t)))))
    (home-page "http://portablecl.org/")
    (synopsis "Portable Computing Language (pocl), an OpenCL implementation")
    (description
     "Pocl is a portable implementation of the OpenCL standard (1.2 with some
2.0 features supported).  This project seeks to improve performance
portability of OpenCL programs with the kernel compiler and the task run-time,
reducing the need for target-dependent manual optimizations.

pocl uses Clang as an OpenCL C frontend and LLVM for kernel compiler
implementation, and as a portability layer.  Thus, if your desired target has
an LLVM backend, it should be able to get OpenCL support easily by using
pocl.")
    (license license:expat)))
