diff -ruN gcc-4.4.0/gcc/config/rs6000/rs6000.c gcc-4.4.0-e500mc64/gcc/config/rs6000/rs6000.c
--- gcc-4.4.0/gcc/config/rs6000/rs6000.c	2009-03-17 15:18:21.000000000 -0500
+++ gcc-4.4.0-e500mc64/gcc/config/rs6000/rs6000.c	2009-12-04 10:36:44.000000000 -0600
@@ -11032,6 +11059,14 @@
 	  mode = SImode;
 	  gen_func.mov = gen_movsi;
 	}
+      else if (TARGET_COPY_UNALIGNED && bytes == 3 && offset > 0)
+	{
+	  /* We generate a single unaligned SI move instead of 2 (HI, QI) */
+	  move_bytes = 3;
+	  mode = SImode;
+	  gen_func.mov = gen_movsi;
+	  offset--;
+	}
       else if (bytes >= 2 && (align >= 16 || !STRICT_ALIGNMENT))
 	{			/* move 2 bytes */
 	  move_bytes = 2;
diff -ruN gcc-4.4.0/gcc/config/rs6000/rs6000.opt gcc-4.4.0-e500mc64/gcc/config/rs6000/rs6000.opt
--- gcc-4.4.0/gcc/config/rs6000/rs6000.opt	2009-02-20 09:20:38.000000000 -0600
+++ gcc-4.4.0-e500mc64/gcc/config/rs6000/rs6000.opt	2009-09-30 13:51:17.000000000 -0500
@@ -201,6 +201,10 @@
 Target RejectNegative Joined
 -misel=yes/no	Deprecated option.  Use -misel/-mno-isel instead
 
+mcopy-unaligned
+Target Report Var(TARGET_COPY_UNALIGNED)
+Generate unaligned word load and stores to move 3 bytes
+
 mspe
 Target
 Generate SPE SIMD instructions on E500