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m68k: reimplement byteswap macros as inlines
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@ -1,3 +1,8 @@
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2011-03-06 Andreas Schwab <schwab@linux-m68k.org>
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* sysdeps/m68k/bits/byteswap.h (__bswap_16, __bswap_32)
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(__bswap_64): Implement as inline functions.
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2011-01-18 Andreas Schwab <schwab@linux-m68k.org>
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* sysdeps/unix/sysv/linux/m68k/bits/mman.h (MADV_HUGEPAGE)
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@ -1,5 +1,5 @@
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/* Macros to swap the order of bytes in integer values. m68k version.
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Copyright (C) 1997, 2002, 2008 Free Software Foundation, Inc.
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Copyright (C) 1997, 2002, 2008, 2011 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -30,36 +30,29 @@
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#define __bswap_constant_16(x) \
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((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))
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#ifdef __GNUC__
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# define __bswap_16(x) \
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(__extension__ \
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({ unsigned short int __bsx = (x); __bswap_constant_16 (__bsx); }))
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#else
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static __inline unsigned short int
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__bswap_16 (unsigned short int __bsx)
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{
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return __bswap_constant_16 (__bsx);
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}
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#endif
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/* Swap bytes in 32 bit value. */
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#define __bswap_constant_32(x) \
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((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \
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(((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24))
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#if defined __GNUC__ && __GNUC__ >= 2 && !defined(__mcoldfire__)
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# define __bswap_32(x) \
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__extension__ \
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({ unsigned int __bswap_32_v; \
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if (__builtin_constant_p (x)) \
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__bswap_32_v = __bswap_constant_32 (x); \
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else \
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__asm__ __volatile__ ("ror%.w %#8, %0;" \
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"swap %0;" \
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"ror%.w %#8, %0" \
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: "=d" (__bswap_32_v) \
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: "0" ((unsigned int) (x))); \
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__bswap_32_v; })
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#if !defined(__mcoldfire__)
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static __inline unsigned int
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__bswap_32 (unsigned int __bsx)
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{
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if (__builtin_constant_p (__bsx))
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return __bswap_constant_32 (__bsx);
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__asm__ __volatile__ ("ror%.w %#8, %0;"
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"swap %0;"
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"ror%.w %#8, %0"
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: "+d" (__bsx));
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return __bsx;
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}
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#else
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static __inline unsigned int
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__bswap_32 (unsigned int __bsx)
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@ -81,19 +74,14 @@ __bswap_32 (unsigned int __bsx)
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| (((x) & 0x00000000000000ffull) << 56))
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/* Swap bytes in 64 bit value. */
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# define __bswap_64(x) \
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__extension__ \
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({ union { unsigned long long int __ll; \
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unsigned long int __l[2]; } __bswap_64_v, __bswap_64_r; \
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if (__builtin_constant_p (x)) \
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__bswap_64_r.__ll = __bswap_constant_64 (x); \
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else \
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{ \
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__bswap_64_v.__ll = (x); \
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__bswap_64_r.__l[0] = __bswap_32 (__bswap_64_v.__l[1]); \
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__bswap_64_r.__l[1] = __bswap_32 (__bswap_64_v.__l[0]); \
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} \
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__bswap_64_r.__ll; })
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static __inline unsigned long long
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__bswap_64 (unsigned long long __bsx)
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{
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if (__builtin_constant_p (__bsx))
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return __bswap_constant_64 (__bsx);
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return (__bswap_32 (__bsx >> 32)
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| ((unsigned long long) __bswap_32 (__bsx) << 32));
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}
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#endif
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#endif /* _BITS_BYTESWAP_H */
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