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8058255: Native jbyte Atomic::cmpxchg for supported x86 platforms

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Use the native cmpxchgb instruction on x86.

Reviewed-by: dholmes, kbarrett, phh
This commit is contained in:
Erik Osterlund 2014-10-21 15:07:25 +02:00 • committed by Jesper Wilhelmsson
parent a5d4521aa1
commit a324ff0f31
18 changed files with 165 additions and 5 deletions
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1
hotspot/src/cpu/x86/vm/assembler_x86.hpp
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@ -1006,6 +1006,7 @@ private:
void cmpxchg8 (Address adr);
void cmpxchgb(Register reg, Address adr);
void cmpxchgl(Register reg, Address adr);
void cmpxchgq(Register reg, Address adr);