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Add references to filed LLVM bugs

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This commit is contained in:
Benoit Jacob 2016-04-08 08:12:47 -04:00
parent 3bd16457e1
commit cd2b667ac8
1 changed files with 4 additions and 0 deletions
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Eigen/src/Core/arch/NEON/PacketMath.h
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@ -179,6 +179,8 @@ template<> EIGEN_STRONG_INLINE Packet4i pdiv<Packet4i>(const Packet4i& /*a*/, co
// Clang/ARM wrongly advertises __ARM_FEATURE_FMA even when it's not available,
// then implements a slow software scalar fallback calling fmaf()!
// Filed LLVM bug:
// https://llvm.org/bugs/show_bug.cgi?id=27216
#if (defined __ARM_FEATURE_FMA) && !(EIGEN_COMP_CLANG && EIGEN_ARCH_ARM)
// See bug 936.
// FMA is available on VFPv4 i.e. when compiling with -mfpu=neon-vfpv4.
@ -195,6 +197,8 @@ template<> EIGEN_STRONG_INLINE Packet4f pmadd(const Packet4f& a, const Packet4f&
// -march=armv7-a, that is a very common case.
// See e.g. this thread:
// http://lists.llvm.org/pipermail/llvm-dev/2013-December/068806.html
// Filed LLVM bug:
// https://llvm.org/bugs/show_bug.cgi?id=27219
Packet4f r = c;
asm volatile(
"vmla.f32 %q[r], %q[a], %q[b]"