Request for review(M): 6964776: c2 should ensure the polling page is reachable on 64 bit
vladimir.kozlov at oracle.com
Fri Mar 25 17:31:36 PDT 2011
+ // It does it the polling page is more than disp32 away.
// It needs it when polling page is more than disp32 away.
Usually predicate is first in instructions definitions.
Igor Veresov wrote:
> C1 and C2 could only use rip-relative addressing when emitting the
> page-polling code, which limited the distance from the code cache to the
> polling page is more than 2G (doesn't fit in a signed 32bit
> displacement). The solution in this case is to materialize the absolute
> pointer to the polling page in a register first, as we do on SPARC.
> Webrev: http://cr.openjdk.java.net/~iveresov/6964776/webrev.00/
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