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| author |  Rasmus Munk Larsen <rmlarsen@google.com> | 2021-06-10 19:18:50 -0700 |
|---|---|---|
| committer | Rasmus Munk Larsen <rmlarsen@google.com> | 2021-06-11 02:35:53 +0000 |
| commit | fc87e2cbaa65e7e93a2c695ce5a9dc048a64a985 (patch) | |
| tree | 5660a36af91911a5f9e1b53c3de2b2622ebcce74 /Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h | |
| parent | f64b2954c711b7846ae6ae228c5f14bd8dd56ec4 (diff) | |
Use bit_cast to create -0.0 for floating point types to avoid compiler optimization changing sign with --ffast-math enabled.
Diffstat (limited to 'Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h')
| -rw-r--r-- | Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h b/Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h index 87e8c2703..8f1c1a874 100644 --- a/Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h +++ b/Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h @@ -839,7 +839,8 @@ Packet psqrt_complex(const Packet& a) { // Step 4. Compute solution for inputs with negative real part: // [|eta0|, sign(y0)*rho0, |eta1|, sign(y1)*rho1] - const RealPacket cst_imag_sign_mask = pset1<Packet>(Scalar(RealScalar(0.0), RealScalar(-0.0))).v; + const RealScalar neg_zero = RealScalar(numext::bit_cast<float>(0x80000000u)); + const RealPacket cst_imag_sign_mask = pset1<Packet>(Scalar(RealScalar(0.0), neg_zero)).v; RealPacket imag_signs = pand(a.v, cst_imag_sign_mask); Packet negative_real_result; // Notice that rho is positive, so taking it's absolute value is a noop. |