[turbofan] Add TruncateFloat64ToInt32 machine operator.

src/compiler/instruction-codes.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_INSTRUCTION_CODES_H_
 #define V8_COMPILER_INSTRUCTION_CODES_H_
 
 #if V8_TARGET_ARCH_ARM
 #include "src/compiler/arm/instruction-codes-arm.h"
 #elif V8_TARGET_ARCH_ARM64
@@ skipping 15 matching lines @@
 
 namespace compiler {
 
 // Target-specific opcodes that specify which assembly sequence to emit.
 // Most opcodes specify a single instruction.
 #define ARCH_OPCODE_LIST(V) \
   V(ArchDeoptimize)         \
   V(ArchJmp)                \
   V(ArchNop)                \
   V(ArchRet)                \
+  V(ArchTruncateDoubleToI)  \
   TARGET_ARCH_OPCODE_LIST(V)
 
 enum ArchOpcode {
 #define DECLARE_ARCH_OPCODE(Name) k##Name,
   ARCH_OPCODE_LIST(DECLARE_ARCH_OPCODE)
 #undef DECLARE_ARCH_OPCODE
 #define COUNT_ARCH_OPCODE(Name) +1
   kLastArchOpcode = -1 ARCH_OPCODE_LIST(COUNT_ARCH_OPCODE)
 #undef COUNT_ARCH_OPCODE
 };
@@ skipping 62 matching lines @@
 typedef BitField<AddressingMode, 7, 4> AddressingModeField;
 typedef BitField<FlagsMode, 11, 2> FlagsModeField;
 typedef BitField<FlagsCondition, 13, 5> FlagsConditionField;
 typedef BitField<int, 13, 19> MiscField;
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_CODES_H_