From 2e45927e04909c3f7c396e910b46e78cc81e91a7 Mon Sep 17 00:00:00 2001
From: Francois Coppens <francois.coppens@irsamc.ups-tlse.fr>
Date: Mon, 30 Jan 2023 17:35:11 +0100
Subject: [PATCH] Added AVX2 detection to autoconfig script. Fixed minor SIMD
 bug in tests.

---
 configure.ac                            | 2 ++
 org/qmckl_sherman_morrison_woodbury.org | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index cefb260..727c585 100644
--- a/configure.ac
+++ b/configure.ac
@@ -223,6 +223,8 @@ AC_RUN_IFELSE(
 int simd=1;
 #if defined(__AVX512F__)
    simd=8;
+#elif defined(__AVX2__)
+   simd=4;
 #elif defined(__AVX__)
    simd=4;
 #elif defined(__SSE2__)
diff --git a/org/qmckl_sherman_morrison_woodbury.org b/org/qmckl_sherman_morrison_woodbury.org
index 71d6544..fcceed9 100644
--- a/org/qmckl_sherman_morrison_woodbury.org
+++ b/org/qmckl_sherman_morrison_woodbury.org
@@ -418,7 +418,7 @@ The tests for the kernels are executed on datasets that are extracted from a run
 
      #+begin_src c :tangle (eval c_test)
 const uint64_t Dim = 21;
-const uint64_t LDS = (1 + (Dim) / SIMD_LENGTH) * SIMD_LENGTH;
+const uint64_t LDS = (1+(Dim-1)/SIMD_LENGTH)*SIMD_LENGTH;
 const double breakdown = 1e-3;
 const double tolerance = 1e-3;
 double res[441];