--- old/src/cpu/ppc/vm/bytes_ppc.hpp	2014-03-03 11:17:53.848852000 -0800
+++ new/src/cpu/ppc/vm/bytes_ppc.hpp	2014-03-03 11:17:53.744862000 -0800
@@ -35,6 +35,128 @@
 
   // Can I count on address always being a pointer to an unsigned char? Yes.
 
+#if defined(VM_LITTLE_ENDIAN)
+
+  // Returns true, if the byte ordering used by Java is different from the native byte ordering
+  // of the underlying machine. For example, true for Intel x86, False, for Solaris on Sparc.
+  static inline bool is_Java_byte_ordering_different() { return true; }
+
+  // Forward declarations of the compiler-dependent implementation
+  static inline u2 swap_u2(u2 x);
+  static inline u4 swap_u4(u4 x);
+  static inline u8 swap_u8(u8 x);
+
+  // TODO(asmundak): PowerPC64 supports unaligned reads/writes, investigate whether explicit
+  // byte manipulation is needed.
+  static inline u2   get_native_u2(address p) {
+    return (intptr_t(p) & 1) == 0
+             ?   *(u2*)p
+             :   ( u2(p[1]) << 8 )
+               | ( u2(p[0])      );
+  }
+
+  static inline u4   get_native_u4(address p) {
+    switch (intptr_t(p) & 3) {
+     case 0:  return *(u4*)p;
+
+     case 2:  return (  u4( ((u2*)p)[1] ) << 16  )
+                   | (  u4( ((u2*)p)[0] )        );
+
+    default:  return ( u4(p[3]) << 24 )
+                   | ( u4(p[2]) << 16 )
+                   | ( u4(p[1]) <<  8 )
+                   |   u4(p[0]);
+    }
+  }
+
+  static inline u8   get_native_u8(address p) {
+    switch (intptr_t(p) & 7) {
+      case 0:  return *(u8*)p;
+
+      case 4:  return (  u8( ((u4*)p)[1] ) << 32  )
+                    | (  u8( ((u4*)p)[0] )        );
+
+      case 2:  return (  u8( ((u2*)p)[3] ) << 48  )
+                    | (  u8( ((u2*)p)[2] ) << 32  )
+                    | (  u8( ((u2*)p)[1] ) << 16  )
+                    | (  u8( ((u2*)p)[0] )        );
+
+     default:  return ( u8(p[7]) << 56 )
+                    | ( u8(p[6]) << 48 )
+                    | ( u8(p[5]) << 40 )
+                    | ( u8(p[4]) << 32 )
+                    | ( u8(p[3]) << 24 )
+                    | ( u8(p[2]) << 16 )
+                    | ( u8(p[1]) <<  8 )
+                    |   u8(p[0]);
+    }
+  }
+
+
+
+  static inline void put_native_u2(address p, u2 x) {
+    if ( (intptr_t(p) & 1) == 0 )  *(u2*)p = x;
+    else {
+      p[1] = x >> 8;
+      p[0] = x;
+    }
+  }
+
+  static inline void put_native_u4(address p, u4 x) {
+    switch ( intptr_t(p) & 3 ) {
+    case 0:  *(u4*)p = x;
+              break;
+
+    case 2:  ((u2*)p)[1] = x >> 16;
+             ((u2*)p)[0] = x;
+             break;
+
+    default: ((u1*)p)[3] = x >> 24;
+             ((u1*)p)[2] = x >> 16;
+             ((u1*)p)[1] = x >>  8;
+             ((u1*)p)[0] = x;
+             break;
+    }
+  }
+
+  static inline void put_native_u8(address p, u8 x) {
+    switch ( intptr_t(p) & 7 ) {
+    case 0:  *(u8*)p = x;
+             break;
+
+    case 4:  ((u4*)p)[1] = x >> 32;
+             ((u4*)p)[0] = x;
+             break;
+
+    case 2:  ((u2*)p)[3] = x >> 48;
+             ((u2*)p)[2] = x >> 32;
+             ((u2*)p)[1] = x >> 16;
+             ((u2*)p)[0] = x;
+             break;
+
+    default: ((u1*)p)[7] = x >> 56;
+             ((u1*)p)[6] = x >> 48;
+             ((u1*)p)[5] = x >> 40;
+             ((u1*)p)[4] = x >> 32;
+             ((u1*)p)[3] = x >> 24;
+             ((u1*)p)[2] = x >> 16;
+             ((u1*)p)[1] = x >>  8;
+             ((u1*)p)[0] = x;
+    }
+  }
+
+  // Efficient reading and writing of unaligned unsigned data in Java byte ordering (i.e. big-endian ordering)
+  // (no byte-order reversal is needed since Power CPUs are big-endian oriented).
+  static inline u2   get_Java_u2(address p) { return swap_u2(get_native_u2(p)); }
+  static inline u4   get_Java_u4(address p) { return swap_u4(get_native_u4(p)); }
+  static inline u8   get_Java_u8(address p) { return swap_u8(get_native_u8(p)); }
+
+  static inline void put_Java_u2(address p, u2 x)     { put_native_u2(p, swap_u2(x)); }
+  static inline void put_Java_u4(address p, u4 x)     { put_native_u4(p, swap_u4(x)); }
+  static inline void put_Java_u8(address p, u8 x)     { put_native_u8(p, swap_u8(x)); }
+
+#else // !defined(VM_LITTLE_ENDIAN)
+
   // Returns true, if the byte ordering used by Java is different from the nativ byte ordering
   // of the underlying machine. For example, true for Intel x86, False, for Solaris on Sparc.
   static inline bool is_Java_byte_ordering_different() { return false; }
@@ -150,6 +272,10 @@
   static inline void put_Java_u2(address p, u2 x)     { put_native_u2(p, x); }
   static inline void put_Java_u4(address p, u4 x)     { put_native_u4(p, x); }
   static inline void put_Java_u8(address p, u8 x)     { put_native_u8(p, x); }
+
+#endif // VM_LITTLE_ENDIAN
 };
 
+#include "bytes_linux_ppc.inline.hpp"
+
 #endif // CPU_PPC_VM_BYTES_PPC_HPP