diff options
Diffstat (limited to 'REORG.TODO/sysdeps/s390/bits/byteswap.h')
| -rw-r--r-- | REORG.TODO/sysdeps/s390/bits/byteswap.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/s390/bits/byteswap.h b/REORG.TODO/sysdeps/s390/bits/byteswap.h new file mode 100644 index 0000000000..6d5f65e6f8 --- /dev/null +++ b/REORG.TODO/sysdeps/s390/bits/byteswap.h @@ -0,0 +1,134 @@ +/* Macros to swap the order of bytes in integer values. s390 version. + Copyright (C) 2000-2017 Free Software Foundation, Inc. + Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). + 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 + <http://www.gnu.org/licenses/>. */ + +#if !defined _BYTESWAP_H && !defined _NETINET_IN_H && !defined _ENDIAN_H +# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead." +#endif + +#include <bits/wordsize.h> + +#ifndef _BITS_BYTESWAP_H +#define _BITS_BYTESWAP_H 1 + +#define __bswap_constant_16(x) \ + ((unsigned short int) ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))) + +/* Get __bswap_16. */ +#include <bits/byteswap-16.h> + +/* 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 +# if __WORDSIZE == 64 +# define __bswap_32(x) \ + (__extension__ \ + ({ unsigned int __v, __x = (x); \ + if (__builtin_constant_p (x)) \ + __v = __bswap_constant_32 (__x); \ + else { \ + unsigned int __tmp = (unsigned int) (__x); \ + __asm__ __volatile__ ( \ + "lrv %0,%1" \ + : "=&d" (__v) : "m" (__tmp)); \ + } \ + __v; })) +# else +# define __bswap_32(x) \ + (__extension__ \ + ({ unsigned int __v, __x = (x); \ + if (__builtin_constant_p (x)) \ + __v = __bswap_constant_32 (__x); \ + else { \ + unsigned int __tmp = (unsigned int) (__x); \ + __asm__ __volatile__ ( \ + "la 1,%1\n" \ + "icm %0,8,3(1)\n" \ + "icm %0,4,2(1)\n" \ + "icm %0,2,1(1)\n" \ + "ic %0,0(1)" \ + : "=&d" (__v) : "m" (__tmp) : "1"); \ + } \ + __v; })) +# endif +#else +static __inline unsigned int +__bswap_32 (unsigned int __bsx) +{ + return __bswap_constant_32 (__bsx); +} +#endif + +/* Swap bytes in 64 bit value. */ +#if defined __GNUC__ && __GNUC__ >= 2 +# define __bswap_constant_64(x) \ + (__extension__ ((((x) & 0xff00000000000000ul) >> 56) \ + | (((x) & 0x00ff000000000000ul) >> 40) \ + | (((x) & 0x0000ff0000000000ul) >> 24) \ + | (((x) & 0x000000ff00000000ul) >> 8) \ + | (((x) & 0x00000000ff000000ul) << 8) \ + | (((x) & 0x0000000000ff0000ul) << 24) \ + | (((x) & 0x000000000000ff00ul) << 40) \ + | (((x) & 0x00000000000000fful) << 56))) + +# if __WORDSIZE == 64 +# define __bswap_64(x) \ + (__extension__ \ + ({ unsigned long __w, __x = (x); \ + if (__builtin_constant_p (x)) \ + __w = __bswap_constant_64 (__x); \ + else { \ + unsigned long __tmp = (unsigned long) (__x); \ + __asm__ __volatile__ ( \ + "lrvg %0,%1" \ + : "=&d" (__w) : "m" (__tmp)); \ + } \ + __w; })) +# else +# define __bswap_64(x) \ + __extension__ \ + ({ union { unsigned long long int __ll; \ + unsigned long int __l[2]; } __w, __r; \ + __w.__ll = (x); \ + __r.__l[0] = __bswap_32 (__w.__l[1]); \ + __r.__l[1] = __bswap_32 (__w.__l[0]); \ + __r.__ll; }) +# endif +#else +# define __bswap_constant_64(x) \ + ((((x) & 0xff00000000000000ull) >> 56) \ + | (((x) & 0x00ff000000000000ull) >> 40) \ + | (((x) & 0x0000ff0000000000ull) >> 24) \ + | (((x) & 0x000000ff00000000ull) >> 8) \ + | (((x) & 0x00000000ff000000ull) << 8) \ + | (((x) & 0x0000000000ff0000ull) << 24) \ + | (((x) & 0x000000000000ff00ull) << 40) \ + | (((x) & 0x00000000000000ffull) << 56)) + +__extension__ +static __inline unsigned long long int +__bswap_64 (unsigned long long int __bsx) +{ + return __bswap_constant_64 (__bsx); +} +#endif + +#endif /* _BITS_BYTESWAP_H */ |