| /* Macros to swap the order of bytes in integer values. s390 version. |
| Copyright (C) 2000-2018 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 */ |