MIPS: Added support for Loongson architectures.

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 167 matching lines @@
     },
     'simulator:arm': {
       'CCFLAGS':      ['-m32'],
       'LINKFLAGS':    ['-m32'],
     },
     'arch:mips': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_MIPS'],
       'mips_arch_variant:mips32r2': {
         'CPPDEFINES':    ['_MIPS_ARCH_MIPS32R2']
       },
+      'mips_arch_variant:loongson': {
+        'CPPDEFINES':    ['_MIPS_ARCH_LOONGSON']
+      },
       'simulator:none': {
         'CCFLAGS':      ['-EL'],
         'LINKFLAGS':    ['-EL'],
         'mips_arch_variant:mips32r2': {
           'CCFLAGS':      ['-mips32r2', '-Wa,-mips32r2']
         },
         'mips_arch_variant:mips32r1': {
           'CCFLAGS':      ['-mips32', '-Wa,-mips32']
         },
+        'mips_arch_variant:loongson': {
+          'CCFLAGS':      ['-march=mips3', '-Wa,-march=mips3']
+        },
         'library:static': {
           'LINKFLAGS':    ['-static', '-static-libgcc']
         },
         'mipsabi:softfloat': {
           'CCFLAGS':      ['-msoft-float'],
           'LINKFLAGS':    ['-msoft-float']
         },
         'mipsabi:hardfloat': {
           'CCFLAGS':      ['-mhard-float'],
           'LINKFLAGS':    ['-mhard-float']
@@ skipping 331 matching lines @@
     },
     'arch:x64': {
       'CCFLAGS':      ['-m64'],
       'LINKFLAGS':    ['-m64']
     },
     'arch:mips': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_MIPS'],
       'mips_arch_variant:mips32r2': {
         'CPPDEFINES':    ['_MIPS_ARCH_MIPS32R2']
       },
+      'mips_arch_variant:loongson': {
+        'CPPDEFINES':    ['_MIPS_ARCH_LOONGSON']
+      },
       'simulator:none': {
         'CCFLAGS':      ['-EL'],
         'LINKFLAGS':    ['-EL'],
         'mips_arch_variant:mips32r2': {
           'CCFLAGS':      ['-mips32r2', '-Wa,-mips32r2']
         },
         'mips_arch_variant:mips32r1': {
           'CCFLAGS':      ['-mips32', '-Wa,-mips32']
         },
+        'mips_arch_variant:loongson': {
+          'CCFLAGS':      ['-march=mips3', '-Wa,-march=mips3']
+        },
         'library:static': {
           'LINKFLAGS':    ['-static', '-static-libgcc']
         },
         'mipsabi:softfloat': {
           'CCFLAGS':      ['-msoft-float'],
           'LINKFLAGS':    ['-msoft-float']
         },
         'mipsabi:hardfloat': {
           'CCFLAGS':      ['-mhard-float'],
           'LINKFLAGS':    ['-mhard-float']
@@ skipping 123 matching lines @@
     },
     'arch:x64': {
       'CCFLAGS':      ['-m64'],
       'LINKFLAGS':    ['-m64']
     },
     'arch:mips': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_MIPS'],
       'mips_arch_variant:mips32r2': {
         'CPPDEFINES':    ['_MIPS_ARCH_MIPS32R2']
       },
+      'mips_arch_variant:loongson': {
+        'CPPDEFINES':    ['_MIPS_ARCH_LOONGSON']
+      },
       'simulator:none': {
         'CCFLAGS':      ['-EL'],
         'LINKFLAGS':    ['-EL'],
         'mips_arch_variant:mips32r2': {
           'CCFLAGS':      ['-mips32r2', '-Wa,-mips32r2']
         },
         'mips_arch_variant:mips32r1': {
           'CCFLAGS':      ['-mips32', '-Wa,-mips32']
         },
+        'mips_arch_variant:loongson': {
+          'CCFLAGS':      ['-march=mips3', '-Wa,-march=mips3']
+        },
         'library:static': {
           'LINKFLAGS':    ['-static', '-static-libgcc']
         },
         'mipsabi:softfloat': {
           'CCFLAGS':      ['-msoft-float'],
           'LINKFLAGS':    ['-msoft-float']
         },
         'mipsabi:hardfloat': {
           'CCFLAGS':      ['-mhard-float'],
           'LINKFLAGS':    ['-mhard-float']
@@ skipping 388 matching lines @@
     'values': ['hard', 'softfp', 'soft'],
     'default': 'softfp',
     'help': 'generate calling conventiont according to selected ARM EABI variant'
   },
   'mipsabi': {
     'values': ['hardfloat', 'softfloat', 'none'],
     'default': 'hardfloat',
     'help': 'generate calling conventiont according to selected mips ABI'
   },
   'mips_arch_variant': {
-    'values': ['mips32r2', 'mips32r1'],
+    'values': ['mips32r2', 'mips32r1', 'loongson'],
     'default': 'mips32r2',
     'help': 'mips variant'
   },
   'compress_startup_data': {
     'values': ['off', 'bz2'],
     'default': 'off',
     'help': 'compress startup data (snapshot) [Linux only]'
   },
   'vfp3': {
     'values': ['on', 'off'],
@@ skipping 438 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()