--- /dev/null
+# Copyright (C) 2011 Apple Inc. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. 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 with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+# THE POSSIBILITY OF SUCH DAMAGE.
+
+GPRS =
+ [
+ "t0",
+ "t1",
+ "t2",
+ "t3",
+ "t4",
+ "cfr",
+ "a0",
+ "a1",
+ "r0",
+ "r1",
+ "sp",
+ "lr",
+
+ # 64-bit only registers:
+ "t5",
+ "t6", # r10
+ "csr1", # r14, tag type number register
+ "csr2" # r15, tag mask register
+ ]
+
+FPRS =
+ [
+ "ft0",
+ "ft1",
+ "ft2",
+ "ft3",
+ "ft4",
+ "ft5",
+ "fa0",
+ "fa1",
+ "fa2",
+ "fa3",
+ "fr"
+ ]
+
+REGISTERS = GPRS + FPRS
+
+GPR_PATTERN = Regexp.new('\\A((' + GPRS.join(')|(') + '))\\Z')
+FPR_PATTERN = Regexp.new('\\A((' + FPRS.join(')|(') + '))\\Z')
+
+REGISTER_PATTERN = Regexp.new('\\A((' + REGISTERS.join(')|(') + '))\\Z')