06/11: gnu: Add xsimd-benchmark.

[guix-commits]

civodul pushed a commit to branch wip-cpu-tuning
in repository guix.

commit 7c3a23a82219d8e19920f4ab51456b794df48dca
Author: Ludovic Courtès <ludo@gnu.org>
AuthorDate: Fri Dec 3 23:27:31 2021 +0100

    gnu: Add xsimd-benchmark.
    
    * gnu/packages/cpp.scm (xsmimd-benchmark): New variable.
---
 gnu/packages/cpp.scm | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/gnu/packages/cpp.scm b/gnu/packages/cpp.scm
index e2f2279..0bf65ed 100644
--- a/gnu/packages/cpp.scm
+++ b/gnu/packages/cpp.scm
@@ -300,6 +300,29 @@ It also provides accelerated implementation of common 
mathematical functions
 operating on batches.")
     (license license:bsd-3)))
 
+(define-public xsmimd-benchmark
+  (package
+    (inherit xsimd)
+    (name "xsimd-benchmark")
+    (arguments
+     `(#:configure-flags (list "-DBUILD_BENCHMARK=ON")
+       #:tests? #f
+       #:phases (modify-phases %standard-phases
+                  (add-after 'unpack 'remove-march=native
+                    (lambda _
+                      (substitute* "benchmark/CMakeLists.txt"
+                        (("-march=native") ""))))
+                  (replace 'install
+                    (lambda* (#:key outputs #:allow-other-keys)
+                      ;; Install nothing but the executable.
+                      (let ((out (assoc-ref outputs "out")))
+                        (install-file "benchmark/benchmark_xsimd"
+                                      (string-append out "/bin"))))))))
+    (synopsis "Benchmark of the xsimd library")
+
+    ;; Mark as tunable to take advantage of SIMD code in xsimd/xtensor.
+    (properties '((tunable? . #t)))))
+
 (define-public chaiscript
   (package
     (name "chaiscript")