https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94111
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:343c467ccdc24edb9acd7c60d54914d9656ab499 commit r9-8389-g343c467ccdc24edb9acd7c60d54914d9656ab499 Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Mar 11 09:33:52 2020 +0100 dfp: Fix decimal_to_binary [PR94111] As e.g. decimal_from_decnumber shows, the REAL_VALUE_TYPE representation contains a decimal128 embedded in ->sig only if it is rvc_normal, for other kinds like rvc_inf or rvc_nan, ->sig is ignored and everything is contained in the REAL_VALUE_TYPE flags (cl, sign, signalling and decimal). decimal_to_binary which is used when folding a decimal{32,64,128} constant to a binary floating point type ignores this and thus folds infinities and NaNs into +0.0. The following patch fixes that by only doing that for rvc_normal. Similarly to the binary to decimal folding, it goes through a string, in order to e.g. deal with canonical NaN mantissas, or binary float formats that don't support infinities and/or NaNs. 2020-03-11 Jakub Jelinek <ja...@redhat.com> PR middle-end/94111 * dfp.c (decimal_to_binary): Only use decimal128ToString if from->cl is rvc_normal, otherwise use real_to_decimal to print the number to string. * gcc.dg/dfp/pr94111.c: New test.
