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diff src/share/vm/opto/matcher.hpp @ 4047:d8cb48376797

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7097546: Optimize use of CMOVE instructions Summary: Avoid CMove in a loop if possible. May generate CMove if it could be moved outside a loop. Reviewed-by: never
author kvn
date Wed, 26 Oct 2011 06:08:56 -0700
parents 95134e034042
children 6729bbc1fcd6
line wrap: on
line diff
--- a/src/share/vm/opto/matcher.hpp	Tue Oct 25 12:51:13 2011 -0700
+++ b/src/share/vm/opto/matcher.hpp	Wed Oct 26 06:08:56 2011 -0700
@@ -360,6 +360,12 @@
   // Anything this size or smaller may get converted to discrete scalar stores.
   static const int init_array_short_size;
 
+  // Some hardware needs 2 CMOV's for longs.
+  static const int long_cmove_cost();
+
+  // Some hardware have expensive CMOV for float and double.
+  static const int float_cmove_cost();
+
   // Should the Matcher clone shifts on addressing modes, expecting them to
   // be subsumed into complex addressing expressions or compute them into
   // registers?  True for Intel but false for most RISCs