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authorEric Andersen <andersen@codepoet.org>2001-10-11 08:29:22 +0000
committerEric Andersen <andersen@codepoet.org>2001-10-11 08:29:22 +0000
commit5c12c8eecd5f2e06c200651e90befe85efcf166f (patch)
treedbaed54145d28357e3b145ad8631529ffd0c2344 /libc/sysdeps/linux/v850/bits/byteswap.h
parenta924265e43cf2fcad97fc9489da482a27b0faf93 (diff)
Patch from Miles Bader <miles@lsi.nec.co.jp> to support the v850.
He sent this patch to me a month ago, but I forgot to apply it...
Diffstat (limited to 'libc/sysdeps/linux/v850/bits/byteswap.h')
-rw-r--r--libc/sysdeps/linux/v850/bits/byteswap.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/v850/bits/byteswap.h b/libc/sysdeps/linux/v850/bits/byteswap.h
new file mode 100644
index 000000000..b5b07209f
--- /dev/null
+++ b/libc/sysdeps/linux/v850/bits/byteswap.h
@@ -0,0 +1,59 @@
+/*
+ * libc/sysdeps/linux/v850/bits/byteswap.h -- Macros to swap the order
+ * of bytes in integer values
+ *
+ * Copyright (C) 2001 NEC Corporation
+ * Copyright (C) 2001 Miles Bader <miles@gnu.org>
+ * Copyright (C) 1997,1998,2001 Free Software Foundation, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License. See the file COPYING.LIB in the main
+ * directory of this archive for more details.
+ */
+
+#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. */
+#ifdef __GNUC__
+# define __bswap_16(x) \
+ (__extension__ \
+ ({ unsigned short int __bsh_val = (x); \
+ __asm__ ("bsh %1, %0" : "=r" (__bsh_val) : "r" (__bsh_val)); \
+ __bsh_val; }))
+#else
+static __inline unsigned short int
+__bswap_16 (unsigned short int __bsx)
+{
+ return ((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8));
+}
+#endif
+
+/* Swap bytes in 32 bit value. */
+#ifdef __GNUC__
+# define __bswap_32(x) \
+ (__extension__ \
+ ({ unsigned short int __bsw_val = (x); \
+ __asm__ ("bsw %1, %0" : "=r" (__bsw_val) : "r" (__bsw_val)); \
+ __bsw_val; }))
+#else
+static __inline unsigned int
+__bswap_32 (unsigned int __bsx)
+{
+ return ((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) |
+ (((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24));
+}
+#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