On Jul 27, 2011, at 12:41 PM, Charles Oliver Nutter wrote: > On Wed, Jul 27, 2011 at 3:21 AM, Rémi Forax <fo...@univ-mlv.fr> wrote: >> I've just read your slides [1]. >> I believe that the test before returning the result of add (slide 201) >> is a safepoint check. > > Oh really? What is it doing with eax, though, since that has the > result of the add operation?
Right, it's a poll page read. test on x86 only sets flags according to the test. The Instruction Set Reference from Intel says: "Description Computes the bit-wise logical AND of first operand (source 1 operand) and the second operand (source 2 operand) and sets the SF, ZF, and PF status flags according to the result. The result is then discarded." -- Christian > > - Charlie > _______________________________________________ > mlvm-dev mailing list > mlvm-dev@openjdk.java.net > http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev _______________________________________________ mlvm-dev mailing list mlvm-dev@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
