[patch, mips] Fix memcpy for mipsisa64-elf target

[Steve Ellcey]

Steven Bosscher discovered a problem with my new MIPS memcpy.S routine
when built for the mipsisa64-elf target.  I would like to check in this
fix for the problem.

The issue is that for the mipsisa64-elf target _MIPS_SIM is not defined
and we need to check for that.

I built mipsisa64-elf using this patch and also tested it on various other
mips targets including mips-mti-elf and mips-mti-linux.

OK to checkin?

Steve Ellcey
sellcey@mips.com


2013-01-07  Steve Ellcey  <sellcey@mips.com>

	* libc/machine/mips/memcpy.S (memcpy): Check if _MIPS_SIM is set.


diff --git a/newlib/libc/machine/mips/memcpy.S b/newlib/libc/machine/mips/memcpy.S
index fe7cb15..574f549 100644
--- a/newlib/libc/machine/mips/memcpy.S
+++ b/newlib/libc/machine/mips/memcpy.S
@@ -56,7 +56,7 @@
 #endif
 #endif
 
-#if (_MIPS_SIM == _ABI64) || (_MIPS_SIM == _ABIN32)
+#if defined(_MIPS_SIM) && ((_MIPS_SIM == _ABI64) || (_MIPS_SIM == _ABIN32))
 #ifndef DISABLE_DOUBLE
 #define USE_DOUBLE
 #endif
@@ -203,7 +203,7 @@
 #define REG1 t1
 #define REG2 t2
 #define REG3 t3
-#if _MIPS_SIM == _ABIO32
+#if defined(_MIPS_SIM) && (_MIPS_SIM == _ABIO32 || _MIPS_SIM == _ABIO64)
 #  define REG4 t4
 #  define REG5 t5
 #  define REG6 t6