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authorUlrich Drepper <drepper@redhat.com>2003-01-08 00:22:00 +0000
committerUlrich Drepper <drepper@redhat.com>2003-01-08 00:22:00 +0000
commitb5facfdac0a9a10f9b0b145d6e3b1348a751f2ff (patch)
treeba1c715765882bf6dad329e73ee45d99c152422e /sysdeps/i386/bits/byteswap.h
parente9c7764ec9fe328dfac0c01a7f609d6a2a9bac00 (diff)
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Update.
2003-01-06 Philip Blundell <philb@gnu.org> * sysdeps/unix/arm/sysdep.S (syscall_error): Optimise a little. [__LIBC_REENTRANT]: Unify PIC and non-PIC cases. * sysdeps/unix/sysv/linux/arm/sysdep.h (PSEUDO): Remove .type directive. (PSEUDO_RET): Use SYSCALL_ERROR in place of __syscall_error. (SYSCALL_ERROR): New. (SYSCALL_ERROR_HANDLER) [NOT_IN_libc]: Provide local copy of error handling code. (INTERNAL_SYSCALL): Define. (INLINE_SYSCALL): Use it. (INTERNAL_SYSCALL_ERROR_P, INTERNAL_SYSCALL_ERRNO): Define. * sysdeps/unix/sysv/linux/arm/socket.S (__socket): Use SYSCALL_ERROR in place of __syscall_error. 2003-01-07 Jakub Jelinek <jakub@redhat.com> * sysdeps/ia64/bits/byteswap.h [__GNUC__ >= 2] (__bswap_16, __bswap_32, __bswap_64): Put x into temporary variable to avoid warnings. [!__GNUC__] (__bswap_16, __bswap_32, __bswap_64): Change into static (inline) functions. * sysdeps/s390/bits/byteswap.h [__GNUC__ >= 2] (__bswap_16, __bswap_32, __bswap_64): Put x into temporary variable to avoid warnings. [!__GNUC__] (__bswap_16, __bswap_32, __bswap_64): Change into static (inline) functions. * sysdeps/i386/bits/byteswap.h [!__GNUC__] (__bswap_16, __bswap_32): Likewise. 2003-01-07 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/alpha/adjtime.c (ntp_adjtime): New weak alias.
Diffstat (limited to 'sysdeps/i386/bits/byteswap.h')
-rw-r--r--sysdeps/i386/bits/byteswap.h41
1 files changed, 28 insertions, 13 deletions
diff --git a/sysdeps/i386/bits/byteswap.h b/sysdeps/i386/bits/byteswap.h
index db8b15d4d3..0d7d75cb42 100644
--- a/sysdeps/i386/bits/byteswap.h
+++ b/sysdeps/i386/bits/byteswap.h
@@ -28,8 +28,9 @@
#define __bswap_constant_16(x) \
((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
-#if defined __GNUC__ && __GNUC__ >= 2
-# define __bswap_16(x) \
+#ifdef __GNUC__
+# if __GNUC__ >= 2
+# define __bswap_16(x) \
(__extension__ \
({ register unsigned short int __v, __x = (x); \
if (__builtin_constant_p (__x)) \
@@ -40,24 +41,31 @@
: "0" (__x) \
: "cc"); \
__v; }))
-#else
+# else
/* This is better than nothing. */
-# define __bswap_16(x) \
+# define __bswap_16(x) \
(__extension__ \
({ register unsigned short int __x = (x); __bswap_constant_16 (__x); }))
+# endif
+#else
+static __inline unsigned short int
+__bswap_16 (unsigned short int __bsx)
+{
+ return __bswap_constant_16 (__bsx);
+}
#endif
-
/* Swap bytes in 32 bit value. */
#define __bswap_constant_32(x) \
((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
-#if defined __GNUC__ && __GNUC__ >= 2
+#ifdef __GNUC__
+# if __GNUC__ >= 2
/* To swap the bytes in a word the i486 processors and up provide the
`bswap' opcode. On i386 we have to use three instructions. */
-# if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__
-# define __bswap_32(x) \
+# if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__
+# define __bswap_32(x) \
(__extension__ \
({ register unsigned int __v, __x = (x); \
if (__builtin_constant_p (__x)) \
@@ -70,8 +78,8 @@
: "0" (__x) \
: "cc"); \
__v; }))
-# else
-# define __bswap_32(x) \
+# else
+# define __bswap_32(x) \
(__extension__ \
({ register unsigned int __v, __x = (x); \
if (__builtin_constant_p (__x)) \
@@ -79,11 +87,18 @@
else \
__asm__ ("bswap %0" : "=r" (__v) : "0" (__x)); \
__v; }))
-# endif
-#else
-# define __bswap_32(x) \
+# endif
+# else
+# define __bswap_32(x) \
(__extension__ \
({ register unsigned int __x = (x); __bswap_constant_32 (__x); }))
+# endif
+#else
+static __inline unsigned int
+__bswap_32 (unsigned int __bsx)
+{
+ return __bswap_constant_32 (__bsx);
+}
#endif