https://sourceware.org/bugzilla/show_bug.cgi?id=22871
--- Comment #18 from Linus Torvalds <torva...@linux-foundation.org> --- (In reply to H.J. Lu from comment #17) > A testb microbenchmark Very interesting. I can confirm that testb seems slower on Skylake too. And it's not some odd effect of just the call/ret sequence - I did a ".rept 100; .endr" around the test instructions to see, and it shows the same pattern. Finally, it's not even about %dil and the REX prefix from your choice of register, it's true even for the one-byte version of "testb %al" (well, two bytes with the immediate, of course). -- You are receiving this mail because: You are on the CC list for the bug. _______________________________________________ bug-binutils mailing list bug-binutils@gnu.org https://lists.gnu.org/mailman/listinfo/bug-binutils
