There is a typo in the formula to compute Maxpow exposed in the comment.
Tested on x86_64-pc-linux-gnu, committed on trunk
gcc/ada/
* libgnat/s-powtab.ads (Maxpow): Use explicit formula in comment.diff --git a/gcc/ada/libgnat/s-powtab.ads b/gcc/ada/libgnat/s-powtab.ads
--- a/gcc/ada/libgnat/s-powtab.ads
+++ b/gcc/ada/libgnat/s-powtab.ads
@@ -36,9 +36,9 @@ package System.Powten_Table is
Maxpow : constant := 22;
-- The number of entries in this table is chosen to include powers of ten
- -- that are exactly representable with long_long_float. Assuming that on
- -- all targets we have 53 bits of mantissa for the type, the upper bound is
- -- given by 53/(log 5). If the scaling factor for a string is greater than
+ -- that are exactly representable with Long_Long_Float. Assuming that on
+ -- all targets we have 53 bits of mantissa for the type, the upper bound
+ -- is given by 53 * log 2 / log 5. If the scaling factor is greater than
-- Maxpow, it can be obtained by several multiplications, which is less
-- efficient than with a bigger table, but avoids anomalies at end points.
