s390: implement atomic exchange on TF

src/s390/assembler-s390.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 1786 matching lines @@
 // 32-bit Load Multiple - long displacement (20-bits signed)
 void Assembler::lmy(Register r1, Register r2, const MemOperand& src) {
   rsy_form(LMY, r1, r2, src.rb(), src.offset());
 }
 
 // 64-bit Load Multiple - long displacement (20-bits signed)
 void Assembler::lmg(Register r1, Register r2, const MemOperand& src) {
   rsy_form(LMG, r1, r2, src.rb(), src.offset());
 }
 
+// 32-bit Compare and Swap
+void Assembler::cs(Register r1, Register r2, const MemOperand& src) {
+  rs_form(CS, r1, r2, src.rb(), src.offset());
+}
+
+// 32-bit Compare and Swap
+void Assembler::csy(Register r1, Register r2, const MemOperand& src) {
+  rsy_form(CSY, r1, r2, src.rb(), src.offset());
+}
+
+// 64-bit Compare and Swap
+void Assembler::csg(Register r1, Register r2, const MemOperand& src) {
+  rsy_form(CSG, r1, r2, src.rb(), src.offset());
+}
+
 // Move integer (32)
 void Assembler::mvhi(const MemOperand& opnd1, const Operand& i2) {
   sil_form(MVHI, opnd1.getBaseRegister(), opnd1.getDisplacement(), i2);
 }
 
 // Move integer (64)
 void Assembler::mvghi(const MemOperand& opnd1, const Operand& i2) {
   sil_form(MVGHI, opnd1.getBaseRegister(), opnd1.getDisplacement(), i2);
 }
 
@@ skipping 329 matching lines @@
                             SKIP_ICACHE_FLUSH);
     }
 
     reloc_info_writer.Write(&rinfo);
   }
 }
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_S390