From 91e99ec1e02100d07e35a7abb1b5c76707237219 Mon Sep 17 00:00:00 2001
From: Chip Kerchner <chip.kerchner@ibm.com>
Date: Wed, 30 Jun 2021 23:05:04 +0000
Subject: [PATCH] Create the ability to disable the specialized gemm_pack_rhs
 in Eigen (only PPC) for TensorFlow

---
 Eigen/src/Core/arch/AltiVec/MatrixProduct.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Eigen/src/Core/arch/AltiVec/MatrixProduct.h b/Eigen/src/Core/arch/AltiVec/MatrixProduct.h
index 4c5cf1762..454b36cd6 100644
--- a/Eigen/src/Core/arch/AltiVec/MatrixProduct.h
+++ b/Eigen/src/Core/arch/AltiVec/MatrixProduct.h
@@ -11,6 +11,10 @@
 #ifndef EIGEN_MATRIX_PRODUCT_ALTIVEC_H
 #define EIGEN_MATRIX_PRODUCT_ALTIVEC_H
 
+#ifndef EIGEN_ALTIVEC_USE_CUSTOM_PACK
+#define EIGEN_ALTIVEC_USE_CUSTOM_PACK    1
+#endif
+
 #include "MatrixProductCommon.h"
 
 // Since LLVM doesn't support dynamic dispatching, force either always MMA or VSX
@@ -2423,6 +2427,7 @@ void gemm_pack_lhs<double, Index, DataMapper, Pack1, Pack2, Packet, RowMajor, Co
     pack(blockA, lhs, depth, rows, stride, offset);
 }
 
+#if EIGEN_ALTIVEC_USE_CUSTOM_PACK
 template<typename Index, typename DataMapper, int nr, bool Conjugate, bool PanelMode>
 struct gemm_pack_rhs<double, Index, DataMapper, nr, ColMajor, Conjugate, PanelMode>
 {
@@ -2450,6 +2455,7 @@ void gemm_pack_rhs<double, Index, DataMapper, nr, RowMajor, Conjugate, PanelMode
   dhs_pack<double, Index, DataMapper, Packet2d, RowMajor, PanelMode, false> pack;
   pack(blockB, rhs, depth, cols, stride, offset);
 }
+#endif
 
 template<typename Index, typename DataMapper, int Pack1, int Pack2, typename Packet, bool Conjugate, bool PanelMode>
 struct gemm_pack_lhs<float, Index, DataMapper, Pack1, Pack2, Packet, RowMajor, Conjugate, PanelMode>
@@ -2478,6 +2484,7 @@ void gemm_pack_lhs<float, Index, DataMapper, Pack1, Pack2, Packet, ColMajor, Con
   dhs_pack<float, Index, DataMapper, Packet4f, ColMajor, PanelMode, true> pack;
   pack(blockA, lhs, depth, rows, stride, offset);
 }
+
 template<typename Index, typename DataMapper, int Pack1, int Pack2, typename Packet, bool Conjugate, bool PanelMode>
 struct gemm_pack_lhs<std::complex<float>, Index, DataMapper, Pack1, Pack2, Packet, RowMajor, Conjugate, PanelMode>
 {
@@ -2506,6 +2513,7 @@ void gemm_pack_lhs<std::complex<float>, Index, DataMapper, Pack1, Pack2, Packet,
   pack(blockA, lhs, depth, rows, stride, offset);
 }
 
+#if EIGEN_ALTIVEC_USE_CUSTOM_PACK
 template<typename Index, typename DataMapper, int nr, bool Conjugate, bool PanelMode>
 struct gemm_pack_rhs<float, Index, DataMapper, nr, ColMajor, Conjugate, PanelMode>
 {
@@ -2533,6 +2541,7 @@ void gemm_pack_rhs<float, Index, DataMapper, nr, RowMajor, Conjugate, PanelMode>
   dhs_pack<float, Index, DataMapper, Packet4f, RowMajor, PanelMode, false> pack;
   pack(blockB, rhs, depth, cols, stride, offset);
 }
+#endif
 
 template<typename Index, typename DataMapper, int nr, bool Conjugate, bool PanelMode>
 struct gemm_pack_rhs<std::complex<float>, Index, DataMapper, nr, ColMajor, Conjugate, PanelMode>