src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp

rev 10271 : 8147844: new method j.l.Runtime.onSpinWait() and the corresponding x86 hotspot instrinsic
Summary: adds c1 & c2 x86 intrinsics for j.l.Runtime.onSpinWait() that utilize the PAUSE instruction
Reviewed-by: iveresov, kvn, vlivanov
Contributed-by: Ivan Krylov <ivan@azul.com>, Yuri Gaevsky <ygaevsky@azul.com>

@@ -3311,10 +3311,13 @@
 
 void LIR_Assembler::membar_storeload() {
   __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
 }
 
+void LIR_Assembler::on_spin_wait() {
+  Unimplemented();
+}
 
 // Pack two sequential registers containing 32 bit values
 // into a single 64 bit register.
 // src and src->successor() are packed into dst
 // src and dst may be the same register.