From 4063a5f9bd18334769b5b1883e8a3a9f188b8459 Mon Sep 17 00:00:00 2001
From: Sandro Mani <manisandro@gmail.com>
Date: Thu, 24 Feb 2022 16:16:28 +0100
Subject: [PATCH] Re-add eigen_mma.patch

---
 eigen3.spec     |  3 +++
 eigen_mma.patch | 14 ++++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 eigen_mma.patch

diff --git a/eigen3.spec b/eigen3.spec
index 139fe79..71a42ef 100644
--- a/eigen3.spec
+++ b/eigen3.spec
@@ -21,6 +21,9 @@ Summary:        A lightweight C++ template library for vector and matrix math
 License:        MPLv2.0 and LGPLv2+ and BSD and Minpack
 URL:            http://eigen.tuxfamily.org/index.php?title=Main_Page
 Source0:        https://gitlab.com/libeigen/eigen/-/archive/%{version}/eigen-%{version}.tar.bz2
+# https://bugzilla.redhat.com/show_bug.cgi?id=1996330
+# Temporarily disable EIGEN_ALTIVEC_DISABLE_MMA on PPC64le
+Patch0:         eigen_mma.patch
 # For mingw, read the comment in the file for details
 Source1:        mingw_TryRunResults.cmake
 
diff --git a/eigen_mma.patch b/eigen_mma.patch
new file mode 100644
index 0000000..cb3b2cb
--- /dev/null
+++ b/eigen_mma.patch
@@ -0,0 +1,14 @@
+diff -rupN --no-dereference eigen-3.4.0/Eigen/src/Core/arch/AltiVec/MatrixProduct.h eigen-3.4.0-new/Eigen/src/Core/arch/AltiVec/MatrixProduct.h
+--- eigen-3.4.0/Eigen/src/Core/arch/AltiVec/MatrixProduct.h	2021-08-18 22:41:58.000000000 +0200
++++ eigen-3.4.0-new/Eigen/src/Core/arch/AltiVec/MatrixProduct.h	2022-02-24 16:16:04.325119524 +0100
+@@ -28,6 +28,10 @@
+ #endif
+ #endif
+ 
++#ifdef __PPC64__
++#define EIGEN_ALTIVEC_DISABLE_MMA
++#endif
++
+ #ifdef __has_builtin
+ #if __has_builtin(__builtin_mma_assemble_acc)
+   #define ALTIVEC_MMA_SUPPORT