From 6de5ed08d88239080b9381f60f75e5abea731d75 Mon Sep 17 00:00:00 2001
From: Rasmus Munk Larsen <rmlarsen@google.com>
Date: Thu, 19 Sep 2019 12:48:30 -0700
Subject: Add generic PacketMath implementation of the Error Function (erf).

---
 Eigen/src/Core/arch/AVX512/MathFunctions.h | 12 ++++++++++++
 Eigen/src/Core/arch/AVX512/PacketMath.h    |  4 +++-
 2 files changed, 15 insertions(+), 1 deletion(-)

(limited to 'Eigen/src/Core/arch/AVX512')

diff --git a/Eigen/src/Core/arch/AVX512/MathFunctions.h b/Eigen/src/Core/arch/AVX512/MathFunctions.h
index 9e37a720b..66581964c 100644
--- a/Eigen/src/Core/arch/AVX512/MathFunctions.h
+++ b/Eigen/src/Core/arch/AVX512/MathFunctions.h
@@ -405,6 +405,18 @@ Packet16f pexpm1<Packet16f>(const Packet16f& _x) {
 }
 #endif
 
+template <>
+EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS EIGEN_UNUSED Packet16f
+ptanh<Packet16f>(const Packet16f& _x) {
+  return internal::generic_fast_tanh_float(_x);
+}
+
+template <>
+EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS EIGEN_UNUSED Packet16f
+perf<Packet16f>(const Packet16f& _x) {
+  return internal::generic_fast_erf_float(_x);
+}
+
 }  // end namespace internal
 
 }  // end namespace Eigen
diff --git a/Eigen/src/Core/arch/AVX512/PacketMath.h b/Eigen/src/Core/arch/AVX512/PacketMath.h
index 589ccbb7a..19c03cfe2 100644
--- a/Eigen/src/Core/arch/AVX512/PacketMath.h
+++ b/Eigen/src/Core/arch/AVX512/PacketMath.h
@@ -98,11 +98,13 @@ template<> struct packet_traits<float>  : default_packet_traits
     HasLog1p  = 1,
     HasExpm1  = 1,
     HasNdtri = 1,
-#endif
     HasBessel  = 1,
+#endif
     HasExp = 1,
     HasSqrt = EIGEN_FAST_MATH,
     HasRsqrt = EIGEN_FAST_MATH,
+    HasTanh = EIGEN_FAST_MATH,
+    HasErf = EIGEN_FAST_MATH,
 #endif
     HasDiv = 1
   };
-- 
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