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fe381c0450
VBLENDPD over using VSHUFPD. While the 256-bit variant of VBLENDPD slows down to the same speed as VSHUFPD on Sandy Bridge CPUs, it has twice the reciprocal throughput on Ivy Bridge CPUs much like it does everywhere for 128-bits. There isn't a downside, so just eagerly use this instruction when it suffices. llvm-svn: 218208 |
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