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The following options can be used for --enable-simd= flag to target different SIMD instruction sets:

<code>	Description
GEN	generic portable vector code
SSE4	SSE 4.2 (128 bit)
AVX	AVX (256 bit)
AVXFMA	AVX (256 bit) + FMA
AVXFMA4	AVX (256 bit) + FMA4
AVX2	AVX 2 (256 bit)
AVX512	AVX 512 bit
QPX	QPX (256 bit)

Alternatively, some CPU codenames can be directly used:

<code>	Description
KNC	Intel Xeon Phi codename Knights Corner
KNL	Intel Xeon Phi codename Knights Landing
BGQ	Blue Gene/Q

Notes (November 2016):

• We are currently supporting AVX512 only for the Intel compiler. GCC and clang will appear in future versions, if the compilers provide sufficient support.
• For BG/Q only bgclang is supported. We do not presently plan to support more compilers for this platform.
• BG/Q performances are currently rather poor. This is being investigated for future versions.

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