Peter Klausler e35cb730cf [flang][runtime] Fix edge cases with ROUND=UP/DOWN (#67508) ...

When an unrepresentable nonzero real input value with a very small
exponent is currently being read in as zero, don't neglect
ROUND=UP/DOWN; return the least nonzero subnormal value instead when
appropriate.

2023-10-16 16:10:44 -07:00

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