From 10c77b0ff44d0b9cb0b252cfa0ccaaa39d3c5da4 Mon Sep 17 00:00:00 2001
From: Chip-Kerchner <chip.kerchner@ibm.com>
Date: Mon, 22 Feb 2021 15:01:47 -0600
Subject: [PATCH] Fix compilation errors with later versions of GCC and use of
 MMA.

---
 Eigen/src/Core/arch/AltiVec/MatrixProductMMA.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Eigen/src/Core/arch/AltiVec/MatrixProductMMA.h b/Eigen/src/Core/arch/AltiVec/MatrixProductMMA.h
index a67dbccf3..a91ec3204 100644
--- a/Eigen/src/Core/arch/AltiVec/MatrixProductMMA.h
+++ b/Eigen/src/Core/arch/AltiVec/MatrixProductMMA.h
@@ -202,6 +202,18 @@ EIGEN_STRONG_INLINE void pgerMMA<Packet2d, __vector_pair, true>(__vector_quad *a
   __builtin_mma_xvf64gernp(acc, a, (__vector unsigned char)b);
 }
 
+template<>
+EIGEN_STRONG_INLINE void pgerMMA<Packet4f, __vector_pair, false>(__vector_quad *acc, const __vector_pair& a, const Packet4f& b)
+{
+  // Just for compilation
+}
+
+template<>
+EIGEN_STRONG_INLINE void pgerMMA<Packet4f, __vector_pair, true>(__vector_quad *acc, const __vector_pair& a, const Packet4f& b)
+{
+  // Just for compilation
+}
+
 // This is necessary because ploadRhs for double returns a pair of vectors when MMA is enabled.
 template<typename Scalar, typename Packet>
 EIGEN_STRONG_INLINE void ploadRhsMMA(const Scalar *rhs, Packet &rhsV)