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author | Ulrich Drepper <drepper@redhat.com> | 2003-01-08 00:22:00 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2003-01-08 00:22:00 +0000 |
commit | b5facfdac0a9a10f9b0b145d6e3b1348a751f2ff (patch) | |
tree | ba1c715765882bf6dad329e73ee45d99c152422e /sysdeps/i386/bits/byteswap.h | |
parent | e9c7764ec9fe328dfac0c01a7f609d6a2a9bac00 (diff) | |
download | glibc-b5facfdac0a9a10f9b0b145d6e3b1348a751f2ff.tar.gz glibc-b5facfdac0a9a10f9b0b145d6e3b1348a751f2ff.tar.xz glibc-b5facfdac0a9a10f9b0b145d6e3b1348a751f2ff.zip |
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.h | 41 |
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 |