David Green f4c5cadbcb [ARM] Select f32 constants with vmov.f16 ...

This adds lowering for f32 values using the vmov.f16, which zeroes the
top bits whilst setting the lower bits to a pattern. This range of
values does not often come up, except where a f16 constant value has
been converted to a f32.

Differential Revision: https://reviews.llvm.org/D87790

2020-09-21 11:10:47 +01:00

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