diff options
author | Eric Andersen <andersen@codepoet.org> | 2002-04-01 11:44:34 +0000 |
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committer | Eric Andersen <andersen@codepoet.org> | 2002-04-01 11:44:34 +0000 |
commit | 193d725142ec7f946088890e0654a11db0c3c6c8 (patch) | |
tree | 2fca0a6bc97debf90869e029f623f22a2cf3acde /libc/sysdeps/linux/h8300/bits/byteswap.h | |
parent | 556cb45061f0c89831972fc6c8554d3b108c3009 (diff) |
Patches from Yoshinori Sato <qzb04471@nifty.ne.jp> to fix h8300
support for pthreads and update for the latest and greatest.
Diffstat (limited to 'libc/sysdeps/linux/h8300/bits/byteswap.h')
-rw-r--r-- | libc/sysdeps/linux/h8300/bits/byteswap.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/h8300/bits/byteswap.h b/libc/sysdeps/linux/h8300/bits/byteswap.h new file mode 100644 index 000000000..dc56467f2 --- /dev/null +++ b/libc/sysdeps/linux/h8300/bits/byteswap.h @@ -0,0 +1,67 @@ +/* Macros to swap the order of bytes in integer values. H8/300 version. + Copyright (C) 1997 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. + + 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. + + 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. */ + +#if !defined _BYTESWAP_H && !defined _NETINET_IN_H +# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead." +#endif + +/* 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)) + +/* 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 +# define __bswap_32(x) \ + __extension__ \ + ({ unsigned int __v; \ + if (__builtin_constant_p (x)) \ + __v = __bswap_constant_32 (x); \ + else \ + __asm__ __volatile__ ("mov.l %0,er0\n\t" \ + "mov.b r0l,r1h\n\t" \ + "mov.b r0h,r1l\n\t" \ + "mov.w r1,e1\n\t" \ + "mov.w e0,r0\n\t" \ + "mov.b r0l,r1h\n\t" \ + "mov.b r0h,r1l\n\t" \ + "mov.l er1,%0" \ + : "=d" (__v) \ + : "0" (x): "er0","er1"); \ + __v; }) +#else +# define __bswap_32(x) __bswap_constant_32 (x) +#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]; } __v, __r; \ + __v.__ll = (x); \ + __r.__l[0] = __bswap_32 (__v.__l[1]); \ + __r.__l[1] = __bswap_32 (__v.__l[0]); \ + __r.__ll; }) +#endif |