From c0d6a72611d40d4e7e45c9adb146b9635e2c12f8 Mon Sep 17 00:00:00 2001
From: Rasmus Munk Larsen <rmlarsen@google.com>
Date: Wed, 12 Oct 2022 01:57:05 +0000
Subject: [PATCH] Use pnegate(pzero(x)) as a generic way to generate -0.0. Some
 compiler do not handle the literal -0.0 properly in fastmath mode.

---
 Eigen/src/Core/functors/BinaryFunctors.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Eigen/src/Core/functors/BinaryFunctors.h b/Eigen/src/Core/functors/BinaryFunctors.h
index dae0d71b7..5bb4e0f9e 100644
--- a/Eigen/src/Core/functors/BinaryFunctors.h
+++ b/Eigen/src/Core/functors/BinaryFunctors.h
@@ -523,7 +523,7 @@ struct scalar_atan2_op {
     // See https://en.cppreference.com/w/cpp/numeric/math/atan2
     // for how corner cases are supposed to be handled according to the
     // IEEE floating-point standard (IEC 60559).
-    const Packet kSignMask = pset1<Packet>(Scalar(-0.0));
+    const Packet kSignMask = pnegate(pzero(x));
     const Packet kPi = pset1<Packet>(Scalar(EIGEN_PI));
     const Packet kPiO2 = pset1<Packet>(Scalar(EIGEN_PI / 2));
     const Packet kPiO4 = pset1<Packet>(Scalar(EIGEN_PI / 4));