diff -up mono/metadata/decimal-ms.c.than
mono/metadata/decimal-ms.c
--- mono/metadata/decimal-ms.c.than  2015-07-06 08:21:27.524461795
-0400
+++ mono/metadata/decimal-ms.c       2015-07-06 08:30:26.954461795
-0400
@@ -55,8 +55,13 @@ static const uint32_t ten_to_ten_div_4 =
 #define DECIMAL_LO32(dec)        ((dec).v.v.Lo32)
 #define DECIMAL_MID32(dec)       ((dec).v.v.Mid32)
 #define DECIMAL_HI32(dec)        ((dec).Hi32)
-#define DECIMAL_LO64_GET(dec)    ((dec).v.Lo64)
-#define DECIMAL_LO64_SET(dec,value)   {(dec).v.Lo64 = value; }
+#if G_BYTE_ORDER != G_LITTLE_ENDIAN
+# define DECIMAL_LO64_GET(dec)   (((uint64_t)((dec).v.v.Mid32) << 32) | (dec).v.v.Lo32)
+# define DECIMAL_LO64_SET(dec,value)   {(dec).v.v.Lo32 = (value); (dec).v.v.Mid32 = ((value) >> 32); }
+#else
+# define DECIMAL_LO64_GET(dec)    ((dec).v.Lo64)
+# define DECIMAL_LO64_SET(dec,value)   {(dec).v.Lo64 = value; }
+#endif

 #define DECIMAL_SETZERO(dec) {DECIMAL_LO32(dec) = 0; DECIMAL_MID32(dec) = 0; DECIMAL_HI32(dec) = 0; DECIMAL_SIGNSCALE(dec) = 0;}
 #define COPYDEC(dest, src) {DECIMAL_SIGNSCALE(dest) = DECIMAL_SIGNSCALE(src); DECIMAL_HI32(dest) = DECIMAL_HI32(src); \