PPC/s390: Implement VisitFloat32Neg/VisitFloat64Neg and instr lcebr for s390

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 2730 matching lines @@
   rre_form(LDEBR, Register::from_code(r1.code()),
            Register::from_code(r2.code()));
 }
 
 // Load Complement Register-Register (LB)
 void Assembler::lcdbr(DoubleRegister r1, DoubleRegister r2) {
   rre_form(LCDBR, Register::from_code(r1.code()),
            Register::from_code(r2.code()));
 }
 
+// Load Complement Register-Register (LB)
+void Assembler::lcebr(DoubleRegister r1, DoubleRegister r2) {
+  rre_form(LCEBR, Register::from_code(r1.code()),
+           Register::from_code(r2.code()));
+}
+
 // Load Positive Register-Register (LB)
 void Assembler::lpebr(DoubleRegister r1, DoubleRegister r2) {
   rre_form(LPEBR, Register::from_code(r1.code()),
            Register::from_code(r2.code()));
 }
 
 // Load Positive Register-Register (LB)
 void Assembler::lpdbr(DoubleRegister r1, DoubleRegister r2) {
   rre_form(LPDBR, Register::from_code(r1.code()),
            Register::from_code(r2.code()));
@@ skipping 318 matching lines @@
                             SKIP_ICACHE_FLUSH);
     }
 
     reloc_info_writer.Write(&rinfo);
   }
 }
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_S390