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8147844: new method j.l.Runtime.onSpinWait() and the corresponding x86 hotspot instrinsic

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Adds c1 & c2 x86 intrinsics for j.l.Runtime.onSpinWait() that utilize the PAUSE instruction

Co-authored-by: Yuri Gaevsky <ygaevsky@azul.com>
Reviewed-by: iveresov, kvn
This commit is contained in:
Ivan Krylov 2016-03-30 17:04:14 +02:00 • committed by Ivan P Krylov
parent cf5871861f
commit 429b1c80a1
22 changed files with 172 additions and 1 deletions
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4
hotspot/src/share/vm/classfile/vmSymbols.hpp
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@ -889,6 +889,10 @@
do_name( newArray_name, "newArray") \
do_signature(newArray_signature, "(Ljava/lang/Class;I)Ljava/lang/Object;") \
\
do_intrinsic(_onSpinWait, java_lang_Thread, onSpinWait_name, onSpinWait_signature, F_S) \
do_name( onSpinWait_name, "onSpinWait") \
do_alias( onSpinWait_signature, void_method_signature) \
\
do_intrinsic(_copyOf, java_util_Arrays, copyOf_name, copyOf_signature, F_S) \
do_name( copyOf_name, "copyOf") \
do_signature(copyOf_signature, "([Ljava/lang/Object;ILjava/lang/Class;)[Ljava/lang/Object;") \