changeset in /hg/icedtea: 2007-12-18 Gary Benson <gbenson at redh...

[Gary Benson]

changeset 9f2e7abafdef in /hg/icedtea
details: http://icedtea.classpath.org/hg/icedtea?cmd=changeset;node=9f2e7abafdef
description:
	2007-12-18  Gary Benson  <gbenson at redhat.com>

		* ports/hotspot/src/cpu/ppc/vm/bytes_ppc.hpp
		(is_Java_byte_ordering_different): Add little endian support.
		(get_Java_u2, get_Java_u4, get_Java_u8): Likewise.
		(put_Java_u2, put_Java_u4, put_Java_u8): Likewise.

diffstat:

2 files changed, 54 insertions(+), 5 deletions(-)
ChangeLog                                  |    7 +++
ports/hotspot/src/cpu/ppc/vm/bytes_ppc.hpp |   52 +++++++++++++++++++++++++---

diffs (92 lines):

diff -r ade9182464c1 -r 9f2e7abafdef ChangeLog
--- a/ChangeLog	Tue Dec 18 04:31:59 2007 -0500
+++ b/ChangeLog	Tue Dec 18 04:36:32 2007 -0500
@@ -1,3 +1,10 @@ 2007-12-18  Gary Benson  <gbenson at redhat
+2007-12-18  Gary Benson  <gbenson at redhat.com>
+
+	* ports/hotspot/src/cpu/ppc/vm/bytes_ppc.hpp
+	(is_Java_byte_ordering_different): Add little endian support.
+	(get_Java_u2, get_Java_u4, get_Java_u8): Likewise.
+	(put_Java_u2, put_Java_u4, put_Java_u8): Likewise.
+
 2007-12-18  Gary Benson  <gbenson at redhat.com>
 
 	* ports/hotspot/src/cpu/ppc/vm/assembler_ppc.hpp
diff -r ade9182464c1 -r 9f2e7abafdef ports/hotspot/src/cpu/ppc/vm/bytes_ppc.hpp
--- a/ports/hotspot/src/cpu/ppc/vm/bytes_ppc.hpp	Tue Dec 18 04:31:59 2007 -0500
+++ b/ports/hotspot/src/cpu/ppc/vm/bytes_ppc.hpp	Tue Dec 18 04:36:32 2007 -0500
@@ -25,12 +25,15 @@
 
 class Bytes: AllStatic {
  public:
-  // Returns true if the byte ordering used by Java is different from
-  // the native byte ordering of the underlying machine. For example,
-  // this is true for Intel x86, but false for Solaris on Sparc.
+  // Returns true if the byte ordering used by Java is different
+  // from the native byte ordering of the underlying machine.
   static inline bool is_Java_byte_ordering_different()
   {
+#ifdef VM_LITTLE_ENDIAN
+    return true;
+#else
     return false;
+#endif
   }
 
   // Efficient reading and writing of unaligned unsigned data in
@@ -132,8 +135,41 @@ class Bytes: AllStatic {
 
 
   // Efficient reading and writing of unaligned unsigned data in Java
-  // byte ordering (i.e. big-endian ordering). No byte-order reversal
-  // is needed since ppc CPUs use big-endian format.
+  // byte ordering (i.e. big-endian ordering).
+#ifdef VM_LITTLE_ENDIAN
+  // Byte-order reversal is needed
+  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));
+  }
+
+  // Efficient swapping of byte ordering
+  static inline u2 swap_u2(u2 x);
+  static inline u4 swap_u4(u4 x);
+  static inline u8 swap_u8(u8 x);
+#else
+  // No byte-order reversal is needed
   static inline u2 get_Java_u2(address p)
   {
     return get_native_u2(p);
@@ -164,5 +200,11 @@ class Bytes: AllStatic {
   static inline u2 swap_u2(u2 x) { return x; }
   static inline u4 swap_u4(u4 x) { return x; }
   static inline u8 swap_u8(u8 x) { return x; }
+#endif // VM_LITTLE_ENDIAN
 };
 
+#ifdef VM_LITTLE_ENDIAN
+// The following header contains the implementations of swap_u2,
+// swap_u4, and swap_u8
+#include "incls/_bytes_pd.inline.hpp.incl"
+#endif // VM_LITTLE_ENDIAN