s390: improve floating point and integer convertion

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 1931 matching lines @@
 // Convert to Fixed Logical (64<-F32)
 void Assembler::clgebr(Condition m3, Condition m4, Register r1,
                        DoubleRegister r2) {
   DCHECK_EQ(m4, Condition(0));
   rrfe_form(CLGEBR, m3, m4, r1, Register::from_code(r2.code()));
 }
 
 // Convert to Fixed Logical (32<-F64)
 void Assembler::clfdbr(Condition m3, Condition m4, Register r1,
                        DoubleRegister r2) {
-  DCHECK_EQ(m3, Condition(0));
   DCHECK_EQ(m4, Condition(0));
-  rrfe_form(CLFDBR, Condition(0), Condition(0), r1,
-            Register::from_code(r2.code()));
+  rrfe_form(CLFDBR, m3, Condition(0), r1, Register::from_code(r2.code()));
 }
 
 // Convert to Fixed Logical (32<-F32)
 void Assembler::clfebr(Condition m3, Condition m4, Register r1,
                        DoubleRegister r2) {
   DCHECK_EQ(m4, Condition(0));
   rrfe_form(CLFEBR, m3, Condition(0), r1, Register::from_code(r2.code()));
 }
 
 // Convert from Fixed Logical (L<-64)
@@ skipping 195 matching lines @@
                             SKIP_ICACHE_FLUSH);
     }
 
     reloc_info_writer.Write(&rinfo);
   }
 }
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_S390