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Add bswap_64 macro and uClibc_page.h. From Peter Kjellerstedt.

Joakim Tjernlund 20 years ago
parent
commit
e6c7d1de2a
2 changed files with 55 additions and 0 deletions
  1. 27 0
      libc/sysdeps/linux/cris/bits/byteswap.h
  2. 28 0
      libc/sysdeps/linux/cris/bits/uClibc_page.h

+ 27 - 0
libc/sysdeps/linux/cris/bits/byteswap.h

@@ -45,4 +45,31 @@ static inline unsigned long __fswab32(unsigned long x)
  ___swab32((x)) : \
  __fswab32((x)))
 
+#if defined __GNUC__ && __GNUC__ >= 2
+/* Swap bytes in 64 bit value.  */
+# 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))
+
+# define __bswap_64(x) \
+     (__extension__                                                           \
+      ({ union { __extension__ unsigned long long int __ll;                   \
+                 unsigned int __l[2]; } __w, __r;                             \
+         if (__builtin_constant_p (x))                                        \
+           __r.__ll = __bswap_constant_64 (x);                                \
+         else                                                                 \
+           {                                                                  \
+             __w.__ll = (x);                                                  \
+             __r.__l[0] = __bswap_32 (__w.__l[1]);                            \
+             __r.__l[1] = __bswap_32 (__w.__l[0]);                            \
+           }                                                                  \
+         __r.__ll; }))
+#endif
+
 #endif /* _BITS_BYTESWAP_H */

+ 28 - 0
libc/sysdeps/linux/cris/bits/uClibc_page.h

@@ -0,0 +1,28 @@
+/*  Copyright (C) 2004     Erik Andersen
+ *
+ *  This 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.
+ *
+ *  This 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 this library; if not, write to the Free
+ *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Supply an architecture specific value for PAGE_SIZE and friends.  */
+
+#ifndef _UCLIBC_PAGE_H
+#define _UCLIBC_PAGE_H
+
+/* PAGE_SHIFT determines the page size -- in this case 8192 */
+#define PAGE_SHIFT	13
+#define PAGE_SIZE	(1UL << PAGE_SHIFT)
+#define PAGE_MASK	(~(PAGE_SIZE-1))
+
+#endif /* _UCLIBC_PAGE_H */