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add a note on bug #992

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This commit is contained in:
Gael Guennebaud 2015-04-08 09:25:34 +02:00
parent d7f51feb07
commit 0eb220c00d
1 changed files with 2 additions and 0 deletions
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Eigen/src/Core/products/GeneralBlockPanelKernel.h
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@ -383,6 +383,8 @@ public:
default_mr = (EIGEN_PLAIN_ENUM_MIN(16,NumberOfRegisters)/2/nr)*LhsPacketSize,
#if defined(EIGEN_HAS_SINGLE_INSTRUCTION_MADD) && !defined(EIGEN_VECTORIZE_ALTIVEC) && !defined(EIGEN_VECTORIZE_VSX)
// we assume 16 registers
// See bug 992, if the scalar type is not vectorizable but that EIGEN_HAS_SINGLE_INSTRUCTION_MADD is defined,
// then using 3*LhsPacketSize triggers non-implemented paths in syrk.
mr = Vectorizable ? 3*LhsPacketSize : default_mr,
#else
mr = default_mr,