From 6e26587d1734d8071b6132fa9a4a6dc5110e4279 Mon Sep 17 00:00:00 2001 From: "Anthony G. Basile" Date: Fri, 25 Mar 2016 16:35:46 -0400 Subject: bits/byteswap-common.h: import recent headers from glibc On systems where uClibc doesn't provide an arch specific byteswap.h, we fall back on bits/byteswap-common.h. However, there is a bug in this header in the __bswap_constant_64(x) macro. If, for example, a double is passed, we get 'invalid operands to binary &' in which we mismatch a 'double' and 'long long unsigned int'. The newer glibc headers fix this and so we import them. Also, since the inclusion of byteswap.h is not appropriate for assembly code, we guard a portion of endian.h which uses byteswap.h from inclusion in any assembly. This is needed, for example, for f2fs-tools 1.6.0 on 32-bit big endian PowerPC. Signed-off-by: Anthony G. Basile --- libc/sysdeps/linux/common/bits/byteswap-16.h | 34 ++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 libc/sysdeps/linux/common/bits/byteswap-16.h (limited to 'libc/sysdeps/linux/common/bits/byteswap-16.h') diff --git a/libc/sysdeps/linux/common/bits/byteswap-16.h b/libc/sysdeps/linux/common/bits/byteswap-16.h new file mode 100644 index 000000000..8063aa82d --- /dev/null +++ b/libc/sysdeps/linux/common/bits/byteswap-16.h @@ -0,0 +1,34 @@ +/* Macros to swap the order of bytes in 16-bit integer values. + Copyright (C) 2012-2016 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 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifndef _BITS_BYTESWAP_H +# error "Never use directly; include instead." +#endif + +#ifdef __GNUC__ +# define __bswap_16(x) \ + (__extension__ \ + ({ unsigned short int __bsx = (unsigned short int) (x); \ + __bswap_constant_16 (__bsx); })) +#else +static __inline unsigned short int +__bswap_16 (unsigned short int __bsx) +{ + return __bswap_constant_16 (__bsx); +} +#endif -- cgit v1.2.3