From 496ee0c0067275e6b7a0226256b0a8ac27b3ca9c Mon Sep 17 00:00:00 2001
From: Cayetano Santos <csantosb@inventati.org>
Date: Fri, 5 Sep 2025 10:19:16 +0200
Subject: [PATCH] gnu: Add onednn.
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* gnu/packages/oneapi.scm (onednn): New variable.

Change-Id: I10e5446aefea2978134495d25b9df504114a7530
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
---
 gnu/packages/oneapi.scm | 77 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

diff --git a/gnu/packages/oneapi.scm b/gnu/packages/oneapi.scm
index a90eaf06324f980e9905e20b3e800e87c64bc0b7..d17f918a20726fc52fcbbc5f42128878607e680b 100644
--- a/gnu/packages/oneapi.scm
+++ b/gnu/packages/oneapi.scm
@@ -18,6 +18,9 @@
 
 (define-module (gnu packages oneapi)
   #:use-module (gnu packages)
+  #:use-module (gnu packages check)
+  #:use-module (gnu packages cpp)
+  #:use-module (gnu packages llvm)
   #:use-module (gnu packages python)
   #:use-module (gnu packages swig)
   #:use-module (guix build-system cmake)
@@ -27,6 +30,80 @@
   #:use-module (guix packages)
   #:use-module (guix utils))
 
+;;; Updates and replaces oneapi-dnnl in (gnu packages machine-learning)
+(define-public onednn
+  ;; See doc/build/build.md.
+  (package
+    (name "onednn")
+    (version "3.9.2")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+              (url "https://github.com/uxlfoundation/oneDNN/")
+              (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0ybq8zb4dcd2g139gdq4bpv20v9jgws5d7ln3x4s0ydrmbgm2qwj"))
+       (modules '((guix build utils)
+                  (ice-9 rdelim)))
+       ;; Copyright date used by code generation script
+       (snippet
+        '(for-each
+          (lambda (file)
+            (with-atomic-file-replacement
+             file
+             (lambda (in out)
+               (let loop ((line (read-line in 'concat)))
+                 (if (string-contains line "Copyright")
+                     (display line out)
+                     (loop (read-line in 'concat)))))))
+          '("include/oneapi/dnnl/dnnl_debug.h"
+            "src/common/dnnl_debug_autogenerated.cpp"
+            "tests/benchdnn/dnnl_debug_autogenerated.cpp"
+            "tests/benchdnn/dnnl_debug.hpp")))))
+    (build-system cmake-build-system)
+    (arguments
+     (list
+      #:configure-flags                 ;see doc/build/build_options.md
+      #~(list
+         #$@(if (target-riscv64?)
+                (list "-DDNNL_CPU_RUNTIME=SEQ")
+                ;; Default; also tbb and sycl.
+                (list "-DDNNL_CPU_RUNTIME=OMP"))
+         "-DDNNL_EXPERIMENTAL_UKERNEL=ON" ;Used in PyTorch
+         "-DONEDNN_BUILD_GRAPH=OFF") ;See scripts/README.md
+      #:phases
+      #~(modify-phases %standard-phases
+          ;; This test times out after 3600 seconds.
+          (add-after 'unpack 'disable-matmul-testing
+            (lambda _
+              (substitute* "tests/benchdnn/benchdnn.cpp"
+                (("matmul::bench.*") ";\n"))))
+          ;; See scripts/README.md.
+          (add-after 'configure 'codegen
+            (lambda _
+              (with-directory-excursion "../source"
+                ;; Generate types.xml.
+                (invoke "castxml" "--castxml-cc-gnu-c" "clang"
+                        "--castxml-output=1" "-Iinclude" "-I../build/include"
+                        "include/oneapi/dnnl/dnnl_types.h" "-o" "types.xml")
+                ;; Run generate_dnnl_debug.py.
+                (invoke
+                 "python3" "scripts/generate_dnnl_debug.py" "types.xml")
+                ;; Generating format tags.
+                ;; Modifies include/oneapi/dnnl/dnnl.hpp
+                (invoke "python3" "scripts/generate_format_tags.py")))))))
+    (native-inputs
+     (list castxml clang-17 googletest python-minimal-wrapper))
+    (home-page "https://uxlfoundation.github.io/oneDNN/")
+    (synopsis "Deep neural network library")
+    (description
+     "@acronym{OneDNN, OneAPI Deep Neural Network Library} is a cross-platform
+performance library of basic building blocks for deep learning applications.")
+    (supported-systems %64bit-supported-systems)
+    (license license:asl2.0)))
+
 ;;; Updates and replaces tbb in (gnu packages tbb)
 (define-public onetbb
   (package