Serge Pavlov 14a1b80e04 Make IEEEFloat::roundToIntegral more standard conformant ...

Behavior of IEEEFloat::roundToIntegral is aligned with IEEE-754
operation roundToIntegralExact. In partucular this function now:
- returns opInvalid for signaling NaNs,
- returns opInexact if the result of rounding differs from argument.

Differential Revision: https://reviews.llvm.org/D75246

2020-03-11 10:38:46 +07:00

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