[flang] Document extension: Ew.0 output editing
authorPeter Klausler <pklausler@nvidia.com>
Wed, 8 Jun 2022 22:52:46 +0000 (15:52 -0700)
committerPeter Klausler <pklausler@nvidia.com>
Mon, 13 Jun 2022 18:50:11 +0000 (11:50 -0700)
commit89e4b75648888026a1f06f486a8fb1599ad79a31
treeeed99a8437b9977bdab34aeba16853662c982a50
parent6bab045d08c325f6b95bb47e2241946f82429e67
[flang] Document extension: Ew.0 output editing

The restrictions on the relationship between a "kP" scale factor
and a Ew.d/Dw.d/Gw.d significant digit count are not enforced for
output editing when there is no nonzero scale factor in effect.
(An error message about a bad scale factor is confusing if no kP
control edit descriptor has been used.)  Document this usage in
Extensions.md.

Differential Revision: https://reviews.llvm.org/D127435
flang/docs/Extensions.md