From cc86a31e20b48b0f03d714b4d1b1f50d52848d36 Mon Sep 17 00:00:00 2001
From: Rasmus Munk Larsen <rmlarsen@google.com>
Date: Tue, 19 May 2020 16:21:56 -0700
Subject: Add guard around specialization for bool, which is only currently
 implemented for SSE.

---
 test/packetmath.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'test/packetmath.cpp')

diff --git a/test/packetmath.cpp b/test/packetmath.cpp
index e59e9df21..7f2e69a50 100644
--- a/test/packetmath.cpp
+++ b/test/packetmath.cpp
@@ -21,7 +21,7 @@ inline T REF_DIV(const T& a, const T& b) { return a / b;}
 template <typename T>
 inline T REF_ABS_DIFF(const T& a, const T& b) { return a>b ? a - b : b-a;}
 
-// Specializations for bool
+// Specializations for bool.
 template <>
 inline bool REF_ADD(const bool& a, const bool& b) { return a || b;}
 template <>
@@ -29,7 +29,6 @@ inline bool REF_SUB(const bool& a, const bool& b) { return a ^ b;}
 template <>
 inline bool REF_MUL(const bool& a, const bool& b) { return a && b;}
 
-
 template<typename FromScalar, typename FromPacket, typename ToScalar, typename ToPacket, bool CanCast = false>
 struct test_cast_helper;
 
@@ -106,10 +105,14 @@ void packetmath_boolean_mask_ops()
   CHECK_CWISE2_IF(true, internal::pcmp_eq, internal::pcmp_eq);
 }
 
+// Packet16b representing bool does not support ptrue, pandnot or pcmp_eq, since the scalar path
+// (for some compilers) compute the bitwise and with 0x1 of the results to keep the value in [0,1].
+#ifdef EIGEN_PACKET_MATH_SSE_H
 template<>
 void packetmath_boolean_mask_ops<bool, internal::Packet16b>()
 {
 }
+#endif
 
 template<typename Scalar,typename Packet> void packetmath()
 {
-- 
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