[PATCH] D18161: APFloat: Add frexp

[Steve Canon via llvm-commits]

scanon added inline comments.

================
Comment at: lib/Support/APFloat.cpp:4003
@@ +4002,3 @@
+
+  Exp = Exp == APFloat::IEK_Zero ? 0 : Exp + 1;
+  return scalbn(Val, -Exp, RM);
----------------
Please add a comment explaining that we add 1 because `frexp` is defined to return a normalized fraction in +/-[0.5, 1.0) rather than the usual range +/-[1.0,2).


http://reviews.llvm.org/D18161