http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57920
Florian Philipp gnu at binarywings dot net changed:
What|Removed |Added
CC||gnu at
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57920
--- Comment #5 from Frank Heckenbach f.heckenb...@fh-soft.de ---
(In reply to Paolo Carlini from comment #1)
Note that in 4.8.x and mainline for modern x86 and x86_64 targets we don't
use /dev/urandom at all, we use __x86_rdrand. In general, the
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57920
--- Comment #6 from Frank Heckenbach f.heckenb...@fh-soft.de ---
(In reply to Paolo Carlini from comment #3)
I'm going to attach a patchlet which does the trick (fread - read) for me.
Note I'm on purpose disabling the use of
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57920
--- Comment #7 from Paolo Carlini paolo.carlini at oracle dot com ---
Agreed, let's just commit the improvement. If/when you become aware of ways to
extend the use of builtins to other CPUs / targets, please let me know, thanks.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57920
Paolo Carlini paolo.carlini at oracle dot com changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57920
--- Comment #1 from Paolo Carlini paolo.carlini at oracle dot com ---
Note that in 4.8.x and mainline for modern x86 and x86_64 targets we don't use
/dev/urandom at all, we use __x86_rdrand. In general, the idea is that more
targets should use
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57920
--- Comment #2 from Paolo Carlini paolo.carlini at oracle dot com ---
I mean we use __builtin_ia32_rdrand32_step ;)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57920
Paolo Carlini paolo.carlini at oracle dot com changed:
What|Removed |Added
Status|UNCONFIRMED |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57920
--- Comment #4 from Paolo Carlini paolo.carlini at oracle dot com ---
Created attachment 30534
-- http://gcc.gnu.org/bugzilla/attachment.cgi?id=30534action=edit
Draft mainline patch
