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Make the GCC workaround for sqrt GCC-only; detect Emscripten as non-GCC

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Benoit Jacob
2016-02-10 11:11:49 -05:00
parent 2ac59e5d36
commit e6ee18d6b4
2 changed files with 11 additions and 2 deletions
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4
Eigen/src/Core/arch/SSE/MathFunctions.h
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@@ -531,7 +531,9 @@ template<>
EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
double sqrt(const double &x)
{
#if EIGEN_COMP_GNUC && !defined(EMSCRIPTEN)
#if EIGEN_COMP_GNUC_STRICT
// This works around a GCC bug generating poor code for _mm_sqrt_pd
// See https://bitbucket.org/eigen/eigen/commits/14f468dba4d350d7c19c9b93072e19f7b3df563b
return internal::pfirst(internal::Packet2d(__builtin_ia32_sqrtsd(_mm_set_sd(x))));
#else
return internal::pfirst(internal::Packet2d(_mm_sqrt_pd(_mm_set_sd(x))));