[turbofan] Add support for reinterpreting integers as floating point and vice versa.

src/compiler/mips64/instruction-codes-mips64.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_MIPS_INSTRUCTION_CODES_MIPS_H_
 #define V8_COMPILER_MIPS_INSTRUCTION_CODES_MIPS_H_
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 70 matching lines @@
   V(Mips64Lhu)                      \
   V(Mips64Sh)                       \
   V(Mips64Ld)                       \
   V(Mips64Lw)                       \
   V(Mips64Sw)                       \
   V(Mips64Sd)                       \
   V(Mips64Lwc1)                     \
   V(Mips64Swc1)                     \
   V(Mips64Ldc1)                     \
   V(Mips64Sdc1)                     \
+  V(Mips64BitcastDL)                \
+  V(Mips64BitcastLD)                \
   V(Mips64Float64ExtractLowWord32)  \
   V(Mips64Float64ExtractHighWord32) \
   V(Mips64Float64InsertLowWord32)   \
   V(Mips64Float64InsertHighWord32)  \
   V(Mips64Push)                     \
   V(Mips64StoreToStackSlot)         \
   V(Mips64StackClaim)               \
   V(Mips64StoreWriteBarrier)
 
 
@@ skipping 14 matching lines @@
 #define TARGET_ADDRESSING_MODE_LIST(V) \
   V(MRI) /* [%r0 + K] */               \
   V(MRR) /* [%r0 + %r1] */
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MIPS_INSTRUCTION_CODES_MIPS_H_