o Don't require long long support in bswap64() functions.

o In i386's <machine/endian.h>, macros have some advantages over
  inlines, so change some inlines to macros.
o In i386's <machine/endian.h>, ungarbage collect word_swap_int()
  (previously __uint16_swap_uint32), it has some uses on i386's with
  PDP endianness.

Submitted by:	bde

o Move a comment up in <machine/endian.h> that was accidentially moved
  down a few revisions ago.
o Reenable userland's use of optimized inline-asm versions of
  byteorder(3) functions.
o Fix ordering of prototypes vs. redefinition of byteorder(3)
  functions, so that the non-GCC (libc asm) case has proper
  prototypes.
o Add proper prototypes for byteorder(3) functions in <sys/param.h>.
o Prevent redundant duplicate prototypes by making use of the
  _BYTEORDER_PROTOTYPED define.
o Move the bswap16(), bswap32(), bswap64() C functions into MD space
  for platforms in which asm versions don't exist.  This significantly
  reduces the complexity of some things at the cost of duplicate code.

Reviewed by:	bde

1 files changed, 33 insertions, 3 deletions

diff --git a/sys/powerpc/include/endian.h b/sys/powerpc/include/endian.h
index 4acd586..4bccc4e 100644
--- a/sys/powerpc/include/endian.h
+++ b/sys/powerpc/include/endian.h
@@ -58,8 +58,38 @@
 #define	BYTE_ORDER	BIG_ENDIAN
 #endif /* !_POSIX_SOURCE */
 
-#ifndef _KERNEL
-#include <sys/cdefs.h>
-#endif /* _KERNEL */
+#ifdef __GNUC__
+
+static __inline __uint16_t
+__bswap16(__uint16_t _x)
+{
+
+	return ((_x >> 8) | ((_x << 8) & 0xff00));
+}
+
+static __inline __uint32_t
+__bswap32(__uint32_t _x)
+{
+
+	return ((_x >> 24) | ((_x >> 8) & 0xff00) | ((_x << 8) & 0xff0000) |
+	    ((_x << 24) & 0xff000000));
+}
+
+static __inline __uint64_t
+__bswap64(__uint64_t _x)
+{
+
+	return ((_x >> 56) | ((_x >> 40) & 0xff00) | ((_x >> 24) & 0xff0000) |
+	    ((_x >> 8) & 0xff000000) | ((_x << 8) & ((__uint64_t)0xff << 32)) |
+	    ((_x << 24) & ((__uint64_t)0xff << 40)) |
+	    ((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56)));
+}
+
+#endif /* __GNUC__ */
+
+#define	__htonl(x)	((__uint32_t)(x))
+#define	__htons(x)	((__uint16_t)(x))
+#define	__ntohl(x)	((__uint32_t)(x))
+#define	__ntohs(x)	((__uint16_t)(x))
 
 #endif /* !_MACHINE_ENDIAN_H_ */