/* Macros to swap the order of bytes in integer values. m68k version.
- Copyright (C) 1997 Free Software Foundation, Inc.
+ Copyright (C) 1997-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
-#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
+#if !defined _BYTESWAP_H && !defined _NETINET_IN_H && !defined _ENDIAN_H
# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
#endif
+#ifndef _BITS_BYTESWAP_H
+#define _BITS_BYTESWAP_H 1
+
/* Swap bytes in 16 bit value. We don't provide an assembler version
because GCC is smart enough to generate optimal assembler output, and
this allows for better cse. */
-#define __bswap_16(x) \
- ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
+#define __bswap_constant_16(x) \
+ ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))
+
+static __inline unsigned short int
+__bswap_16 (unsigned short int __bsx)
+{
+ return __bswap_constant_16 (__bsx);
+}
/* Swap bytes in 32 bit value. */
#define __bswap_constant_32(x) \
- ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
- (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
+ ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \
+ (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24))
-#if defined __GNUC__ && __GNUC__ >= 2
-# define __bswap_32(x) \
- __extension__ \
- ({ unsigned int __bswap_32_v; \
- if (__builtin_constant_p (x)) \
- __bswap_32_v = __bswap_constant_32 (x); \
- else \
- __asm__ __volatile__ ("ror%.w %#8, %0;" \
- "swap %0;" \
- "ror%.w %#8, %0" \
- : "=d" (__bswap_32_v) \
- : "0" (x)); \
- __bswap_32_v; })
+#if !defined(__mcoldfire__)
+static __inline unsigned int
+__bswap_32 (unsigned int __bsx)
+{
+ if (__builtin_constant_p (__bsx))
+ return __bswap_constant_32 (__bsx);
+ __asm__ __volatile__ ("ror%.w %#8, %0;"
+ "swap %0;"
+ "ror%.w %#8, %0"
+ : "+d" (__bsx));
+ return __bsx;
+}
#else
-# define __bswap_32(x) __bswap_constant_32 (x)
+static __inline unsigned int
+__bswap_32 (unsigned int __bsx)
+{
+ return __bswap_constant_32 (__bsx);
+}
#endif
#if defined __GNUC__ && __GNUC__ >= 2
/* Swap bytes in 64 bit value. */
-# define __bswap_64(x) \
- __extension__ \
- ({ union { unsigned long long int __ll; \
- unsigned long int __l[2]; } __bswap_64_v, __bswap_64_r; \
- __bswap_64_v.__ll = (x); \
- __bswap_64_r.__l[0] = __bswap_32 (__bswap_64_v.__l[1]); \
- __bswap_64_r.__l[1] = __bswap_32 (__bswap_64_v.__l[0]); \
- __bswap_64_r.__ll; })
+# define __bswap_constant_64(x) \
+ __extension__ \
+ ((((x) & 0xff00000000000000ull) >> 56) \
+ | (((x) & 0x00ff000000000000ull) >> 40) \
+ | (((x) & 0x0000ff0000000000ull) >> 24) \
+ | (((x) & 0x000000ff00000000ull) >> 8) \
+ | (((x) & 0x00000000ff000000ull) << 8) \
+ | (((x) & 0x0000000000ff0000ull) << 24) \
+ | (((x) & 0x000000000000ff00ull) << 40) \
+ | (((x) & 0x00000000000000ffull) << 56))
+
+/* Swap bytes in 64 bit value. */
+__extension__
+static __inline unsigned long long
+__bswap_64 (unsigned long long __bsx)
+{
+ if (__builtin_constant_p (__bsx))
+ return __bswap_constant_64 (__bsx);
+ return (__bswap_32 (__bsx >> 32)
+ | ((unsigned long long) __bswap_32 (__bsx) << 32));
+}
#endif
+
+#endif /* _BITS_BYTESWAP_H */
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