Enable snapshots on MIPS. This is based on

SConstruct

 # Copyright 2012 the V8 project authors. 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.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 200 matching lines @@
           'CCFLAGS':      ['-mhard-float'],
           'LINKFLAGS':    ['-mhard-float']
         }
       }
     },
     'simulator:mips': {
       'CCFLAGS':      ['-m32'],
       'LINKFLAGS':    ['-m32'],
       'mipsabi:softfloat': {
         'CPPDEFINES':    ['__mips_soft_float=1'],
+        'fpu:on': {
+          'CPPDEFINES' : ['CAN_USE_FPU_INSTRUCTIONS']
+        }
       },
       'mipsabi:hardfloat': {
-        'CPPDEFINES':    ['__mips_hard_float=1'],
+        'CPPDEFINES':    ['__mips_hard_float=1', 'CAN_USE_FPU_INSTRUCTIONS'],
       }
     },
     'arch:x64': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_X64'],
       'CCFLAGS':      ['-m64'],
       'LINKFLAGS':    ['-m64'],
     },
     'gdbjit:on': {
       'CPPDEFINES':   ['ENABLE_GDB_JIT_INTERFACE']
     },
@@ skipping 334 matching lines @@
         },
         'library:static': {
           'LINKFLAGS':    ['-static', '-static-libgcc']
         },
         'mipsabi:softfloat': {
           'CCFLAGS':      ['-msoft-float'],
           'LINKFLAGS':    ['-msoft-float']
         },
         'mipsabi:hardfloat': {
           'CCFLAGS':      ['-mhard-float'],
-          'LINKFLAGS':    ['-mhard-float']
+          'LINKFLAGS':    ['-mhard-float'],
+          'fpu:on': {
+            'CPPDEFINES' : ['CAN_USE_FPU_INSTRUCTIONS']
+          }
         }
       }
     },
     'simulator:arm': {
       'CCFLAGS':      ['-m32'],
       'LINKFLAGS':    ['-m32']
     },
     'simulator:mips': {
       'CCFLAGS':      ['-m32'],
       'LINKFLAGS':    ['-m32']
@@ skipping 550 matching lines @@
   'compress_startup_data': {
     'values': ['off', 'bz2'],
     'default': 'off',
     'help': 'compress startup data (snapshot) [Linux only]'
   },
   'vfp3': {
     'values': ['on', 'off'],
     'default': 'on',
     'help': 'use vfp3 instructions when building the snapshot [Arm only]'
   },
+  'fpu': {
+    'values': ['on', 'off'],
+    'default': 'on',
+    'help': 'use fpu instructions when building the snapshot [MIPS only]'
+  },
 
 }
 
 ALL_OPTIONS = dict(PLATFORM_OPTIONS, **SIMPLE_OPTIONS)
 
 
 def AddOptions(options, result):
   guess_env = Environment(options=result)
   for (name, option) in options.iteritems():
     if 'guess' in option:
@@ skipping 425 matching lines @@
 # version of scons.  Also, there's a bug in some revisions that
 # doesn't allow this flag to be set, so we swallow any exceptions.
 # Lovely.
 try:
   SetOption('warn', 'no-deprecated')
 except:
   pass
 
 
 Build()