From fc87e2cbaa65e7e93a2c695ce5a9dc048a64a985 Mon Sep 17 00:00:00 2001 From: Rasmus Munk Larsen Date: Thu, 10 Jun 2021 19:18:50 -0700 Subject: Use bit_cast to create -0.0 for floating point types to avoid compiler optimization changing sign with --ffast-math enabled. --- Eigen/src/Core/arch/NEON/PacketMath.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'Eigen/src/Core/arch/NEON/PacketMath.h') diff --git a/Eigen/src/Core/arch/NEON/PacketMath.h b/Eigen/src/Core/arch/NEON/PacketMath.h index 73a35c570..e1efe9bcb 100644 --- a/Eigen/src/Core/arch/NEON/PacketMath.h +++ b/Eigen/src/Core/arch/NEON/PacketMath.h @@ -866,12 +866,12 @@ template<> EIGEN_STRONG_INLINE Packet2ul psub(const Packet2ul& a, con template<> EIGEN_STRONG_INLINE Packet2f pxor(const Packet2f& a, const Packet2f& b); template<> EIGEN_STRONG_INLINE Packet2f paddsub(const Packet2f& a, const Packet2f & b) { - Packet2f mask = {-0.0f, 0.0f}; + Packet2f mask = {numext::bit_cast(0x80000000u), 0.0f}; return padd(a, pxor(mask, b)); } template<> EIGEN_STRONG_INLINE Packet4f pxor(const Packet4f& a, const Packet4f& b); template<> EIGEN_STRONG_INLINE Packet4f paddsub(const Packet4f& a, const Packet4f& b) { - Packet4f mask = {-0.0f, 0.0f, -0.0f, 0.0f}; + Packet4f mask = {numext::bit_cast(0x80000000u), 0.0f, numext::bit_cast(0x80000000u), 0.0f}; return padd(a, pxor(mask, b)); } @@ -3751,7 +3751,7 @@ template<> EIGEN_STRONG_INLINE Packet2d psub(const Packet2d& a, const template<> EIGEN_STRONG_INLINE Packet2d pxor(const Packet2d& , const Packet2d& ); template<> EIGEN_STRONG_INLINE Packet2d paddsub(const Packet2d& a, const Packet2d& b){ - const Packet2d mask = {-0.0,0.0}; + const Packet2d mask = {numext::bit_cast(0x8000000000000000ull),0.0}; return padd(a, pxor(mask, b)); } -- cgit v1.2.3