[Bug target/62011] False Data Dependency in popcnt instruction

2014-08-12 Thread finis at in dot tum.de
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62011 --- Comment #8 from finis at in dot tum.de --- @Yuri: Note however, that the result of your fixed u32 version seems to be wrong.

[Bug target/62011] False Data Dependency in popcnt instruction

2014-08-07 Thread finis at in dot tum.de
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62011 finis at in dot tum.de changed: What|Removed |Added CC||finis at in dot tum.de

[Bug target/62011] False Data Dependency in popcnt instruction

2014-08-07 Thread finis at in dot tum.de
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62011 --- Comment #5 from finis at in dot tum.de --- Maybe there are a lot more instructions with such a false dependency. popcnt may only be the tip of the ice berg. I don't think Intel only got this operation wrong and all other SSE/AVX