On 07/27/2011 01:27 PM, Christian Thalinger wrote: > 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."
so it doesn't change eax. cool ! > -- Christian Rémi _______________________________________________ mlvm-dev mailing list mlvm-dev@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
