Introduce x87 port

src/full-codegen.h

 // Copyright 2012 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_FULL_CODEGEN_H_
 #define V8_FULL_CODEGEN_H_
 
 #include "v8.h"
 
 #include "allocation.h"
@@ skipping 81 matching lines @@
       case NO_REGISTERS: return "NO_REGISTERS";
       case TOS_REG: return "TOS_REG";
     }
     UNREACHABLE();
     return NULL;
   }
 
   static const int kMaxBackEdgeWeight = 127;
 
   // Platform-specific code size multiplier.
-#if V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X87
   static const int kCodeSizeMultiplier = 105;
   static const int kBootCodeSizeMultiplier = 100;
 #elif V8_TARGET_ARCH_X64
   static const int kCodeSizeMultiplier = 170;
   static const int kBootCodeSizeMultiplier = 140;
 #elif V8_TARGET_ARCH_ARM
   static const int kCodeSizeMultiplier = 149;
   static const int kBootCodeSizeMultiplier = 110;
 #elif V8_TARGET_ARCH_ARM64
 // TODO(all): Copied ARM value. Check this is sensible for ARM64.
@@ skipping 825 matching lines @@
 
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FULL_CODEGEN_H_