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Use bit_cast to create -0.0 for floating point types to avoid compiler optimization changing sign with --ffast-math enabled.

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This commit is contained in:
Rasmus Munk Larsen
2021-06-10 19:18:50 -07:00
parent f64b2954c7
commit fc87e2cbaa
6 changed files with 16 additions and 12 deletions
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5
Eigen/src/Core/arch/ZVector/PacketMath.h
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@@ -94,8 +94,9 @@ static _EIGEN_DECLARE_CONST_FAST_Packet2d(ZERO, 0);
static _EIGEN_DECLARE_CONST_FAST_Packet2l(ZERO, 0);
static _EIGEN_DECLARE_CONST_FAST_Packet2l(ONE, 1);
static Packet2d p2d_ONE = { 1.0, 1.0 };
static Packet2d p2d_ZERO_ = { -0.0, -0.0 };
static Packet2d p2d_ONE = { 1.0, 1.0 };
static Packet2d p2d_ZERO_ = { numext::bit_cast<double>0x8000000000000000ull),
numext::bit_cast<double>0x8000000000000000ull) };
#if !defined(__ARCH__) || (defined(__ARCH__) && __ARCH__ >= 12)
#define _EIGEN_DECLARE_CONST_FAST_Packet4f(NAME,X) \