[PATCH/RFC] byteswap: unify common definitions
Mike Frysinger
vapier at gentoo.org
Mon Jul 20 20:49:00 UTC 2009
The majority of the byteswap functions are the same across all arches, so
setup a common header to provide definitions if they don't exist. This
allows arches to override only the ones they actually want to implement
with inline assembly.
Signed-off-by: Mike Frysinger <vapier at gentoo.org>
---
seems to build for me ... any comments before i commit ?
libc/sysdeps/linux/bfin/bits/byteswap.h | 92 +++-------------
libc/sysdeps/linux/common/bits/byteswap-common.h | 108 ++++++++++++++++++
libc/sysdeps/linux/common/bits/byteswap.h | 88 +---------------
libc/sysdeps/linux/cris/bits/byteswap.h | 79 ++------------
libc/sysdeps/linux/h8300/bits/byteswap.h | 61 +++--------
libc/sysdeps/linux/i386/bits/byteswap.h | 121 ++++-----------------
libc/sysdeps/linux/ia64/bits/byteswap.h | 100 ++++--------------
libc/sysdeps/linux/m68k/bits/byteswap.h | 50 ++-------
libc/sysdeps/linux/v850/bits/byteswap.h | 48 ++-------
libc/sysdeps/linux/x86_64/bits/byteswap.h | 127 ++++++----------------
10 files changed, 242 insertions(+), 632 deletions(-)
create mode 100644 libc/sysdeps/linux/common/bits/byteswap-common.h
diff --git a/libc/sysdeps/linux/bfin/bits/byteswap.h b/libc/sysdeps/linux/bfin/bits/byteswap.h
index 74b87d9..4fd3c99 100644
--- a/libc/sysdeps/linux/bfin/bits/byteswap.h
+++ b/libc/sysdeps/linux/bfin/bits/byteswap.h
@@ -7,88 +7,28 @@
* Licensed under the GPL-2 or later.
*/
-#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
-# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
-#endif
-
-#ifndef _BITS_BYTESWAP_H
-#define _BITS_BYTESWAP_H 1
+#ifndef _ASM_BITS_BYTESWAP_H
+#define _ASM_BITS_BYTESWAP_H 1
-/* Swap bytes in 16 bit value. */
-#define __bswap_constant_16(x) \
- ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))
-
-#ifdef __GNUC__
-# define __bswap_16(x) \
+#define __bswap_non_constant_16(x)
(__extension__ \
- ({ register unsigned short int __v, __x = (x); \
- if (__builtin_constant_p (__x)) \
- __v = __bswap_constant_16 (__x); \
- else \
- __asm__ ("%0 = PACK (%1.L, %1.L);" \
- "%0 >>= 8;" \
- : "=d" (__v) \
- : "d" (__x)); \
+ ({ register unsigned short int __v; \
+ __asm__ ("%0 = PACK (%1.L, %1.L);" \
+ "%0 >>= 8;" \
+ : "=d" (__v) \
+ : "d" (x)); \
__v; }))
-#else
-static __inline unsigned short int
-__bswap_16 (unsigned short int __bsx)
-{
- return __bswap_constant_16 (__bsx);
-}
-#endif
-/* Swap bytes in 32 bit value. */
-#define __bswap_constant_32(x) \
- ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \
- (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24))
-
-#ifdef __GNUC__
-# define __bswap_32(x) \
+#define __bswap_non_constant_32(x) \
(__extension__ \
- ({ register unsigned int __v, __x = (x); \
- if (__builtin_constant_p (__x)) \
- __v = __bswap_constant_32 (__x); \
- else \
- __asm__ ("%1 = %0 >> 8 (V);" \
- "%0 = %0 << 8 (V);" \
- "%0 = %0 | %1;" \
- "%1 = PACK(%0.L, %0.H);" \
- : "+d"(__x), "=&d"(__v)); \
+ ({ register unsigned int __v; \
+ __asm__ ("%1 = %0 >> 8 (V);" \
+ "%0 = %0 << 8 (V);" \
+ "%0 = %0 | %1;" \
+ "%1 = PACK(%0.L, %0.H);" \
+ : "+d"(x), "=&d"(__v)); \
__v; }))
-#else
-static __inline unsigned int
-__bswap_32 (unsigned int __bsx)
-{
- return __bswap_constant_32 (__bsx);
-}
-#endif
-#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 */
+#include <bits/byteswap-common.h>
diff --git a/libc/sysdeps/linux/common/bits/byteswap-common.h b/libc/sysdeps/linux/common/bits/byteswap-common.h
new file mode 100644
index 0000000..8586ed0
--- /dev/null
+++ b/libc/sysdeps/linux/common/bits/byteswap-common.h
@@ -0,0 +1,108 @@
+/* Macros to swap the order of bytes in integer values.
+ Copyright (C) 1997,1998,2000,2001,2002,2005 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
+# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
+#endif
+
+#ifndef _BITS_BYTESWAP_H
+#define _BITS_BYTESWAP_H 1
+
+/* Swap bytes in 16 bit value. */
+#define __bswap_constant_16(x) \
+ ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))
+
+#ifndef __bswap_non_constant_16
+# define __bswap_non_constant_16(x) __bswap_constant_16(x)
+#endif
+#ifdef __GNUC__
+# define __bswap_16(x) \
+ (__extension__ \
+ ({ unsigned short int __bsv, __bsx = (x); \
+ if (__builtin_constant_p (__bsx)) \
+ __bsv = __bswap_constant_16 (__bsx); \
+ else \
+ __bsv = __bswap_non_constant_16 (__bsx); \
+ __bsv; }))
+#else
+static __inline unsigned short int
+__bswap_16 (unsigned short int __bsx)
+{
+ return __bswap_constant_16 (__bsx);
+}
+#endif
+
+/* Swap bytes in 32 bit value. */
+#define __bswap_constant_32(x) \
+ ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \
+ (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24))
+
+#ifndef __bswap_non_constant_32
+# define __bswap_non_constant_32(x) __bswap_constant_32(x)
+#endif
+#ifdef __GNUC__
+# define __bswap_32(x) \
+ (__extension__ \
+ ({ unsigned int __bsv, __bsx = (x); \
+ if (__builtin_constant_p (__bsx)) \
+ __bsv = __bswap_constant_32 (__bsx); \
+ else \
+ __bsv = __bswap_non_constant_32 (__bsx); \
+ __bsv; }))
+#else
+static __inline unsigned int
+__bswap_32 (unsigned int __bsx)
+{
+ return __bswap_constant_32 (__bsx);
+}
+#endif
+
+#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))
+
+# ifndef __bswap_non_constant_64
+# define __bswap_non_constant_64(x) \
+ (__extension__ \
+ ({ union { __extension__ unsigned long long int __ll; \
+ unsigned int __l[2]; } __w, __r; \
+ __w.__ll = (x); \
+ __r.__l[0] = __bswap_non_constant_32 (__w.__l[1]); \
+ __r.__l[1] = __bswap_non_constant_32 (__w.__l[0]); \
+ __r.__ll; }))
+# endif
+# define __bswap_64(x) \
+ (__extension__ \
+ ({ __extension__ unsigned long long int __ll; \
+ if (__builtin_constant_p (x)) \
+ __ll = __bswap_constant_64 (x); \
+ else \
+ __ll = __bswap_non_constant_64 (x); \
+ __ll; }))
+#endif
+
+#endif /* _BITS_BYTESWAP_H */
diff --git a/libc/sysdeps/linux/common/bits/byteswap.h b/libc/sysdeps/linux/common/bits/byteswap.h
index 949ed0b..3f02506 100644
--- a/libc/sysdeps/linux/common/bits/byteswap.h
+++ b/libc/sysdeps/linux/common/bits/byteswap.h
@@ -1,87 +1 @@
-/* Macros to swap the order of bytes in integer values.
- Copyright (C) 1997,1998,2000,2001,2002,2005 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
-# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
-#endif
-
-#ifndef _BITS_BYTESWAP_H
-#define _BITS_BYTESWAP_H 1
-
-/* Swap bytes in 16 bit value. */
-#define __bswap_constant_16(x) \
- ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))
-
-#ifdef __GNUC__
-# define __bswap_16(x) \
- (__extension__ \
- ({ unsigned short int __bsx = (x); __bswap_constant_16 (__bsx); }))
-#else
-static __inline unsigned short int
-__bswap_16 (unsigned short int __bsx)
-{
- return __bswap_constant_16 (__bsx);
-}
-#endif
-
-/* Swap bytes in 32 bit value. */
-#define __bswap_constant_32(x) \
- ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \
- (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24))
-
-#ifdef __GNUC__
-# define __bswap_32(x) \
- (__extension__ \
- ({ register unsigned int __bsx = (x); __bswap_constant_32 (__bsx); }))
-#else
-static __inline unsigned int
-__bswap_32 (unsigned int __bsx)
-{
- return __bswap_constant_32 (__bsx);
-}
-#endif
-
-#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 */
+#include <bits/byteswap-common.h>
diff --git a/libc/sysdeps/linux/cris/bits/byteswap.h b/libc/sysdeps/linux/cris/bits/byteswap.h
index 4027456..a82f9c0 100644
--- a/libc/sysdeps/linux/cris/bits/byteswap.h
+++ b/libc/sysdeps/linux/cris/bits/byteswap.h
@@ -1,83 +1,20 @@
-#ifndef _BITS_BYTESWAP_H
-#define _BITS_BYTESWAP_H 1
+#ifndef _ASM_BITS_BYTESWAP_H
+#define _ASM_BITS_BYTESWAP_H 1
/* CRIS specific byte swap operations: 16, 32 and 64-bit */
-/* Swap bytes in 16 bit value. */
-#define __bswap_constant_16(x) \
-({ \
- unsigned short __x = (x); \
- ((unsigned short)( \
- (((unsigned short)(__x) & (unsigned short)0x00ffu) << 8) | \
- (((unsigned short)(__x) & (unsigned short)0xff00u) >> 8) )); \
-})
-
-#if defined __GNUC__ && __GNUC__ >= 2
-# define __bswap_16(x) \
+#define __bswap_non_constant_16(x) \
__extension__ \
({ unsigned short __bswap_16_v; \
- if (__builtin_constant_p (x)) \
- __bswap_16_v = __bswap_constant_16 (x); \
- else \
- __asm__ ("swapb %0" : "=r" (__bswap_16_v) : "0" (x)); \
+ __asm__ ("swapb %0" : "=r" (__bswap_16_v) : "0" (x)); \
__bswap_16_v; })
-#else
-# define __bswap_16(x) __bswap_constant_16 (x)
-#endif
-
-
-/* Swap bytes in 32 bit value. */
-#define __bswap_constant_32(x) \
-({ \
- unsigned long __x = (x); \
- ((unsigned long)( \
- (((unsigned long)(__x) & (unsigned long)0x000000fful) << 24) | \
- (((unsigned long)(__x) & (unsigned long)0x0000ff00ul) << 8) | \
- (((unsigned long)(__x) & (unsigned long)0x00ff0000ul) >> 8) | \
- (((unsigned long)(__x) & (unsigned long)0xff000000ul) >> 24) )); \
-})
-#if defined __GNUC__ && __GNUC__ >= 2
-# define __bswap_32(x) \
+#define __bswap_non_constant_32(x) \
__extension__ \
- ({ unsigned long __bswap_32_v; \
- if (__builtin_constant_p (x)) \
- __bswap_32_v = __bswap_constant_32 (x); \
- else \
- __asm__ ("swapwb %0" : "=r" (__bswap_32_v) : "0" (x)); \
+ ({ unsigned int __bswap_32_v; \
+ __asm__ ("swapwb %0" : "=r" (__bswap_32_v) : "0" (x)); \
__bswap_32_v; })
-#else
-# define __bswap_32(x) __bswap_constant_32 (x)
-#endif
-
-
-/* 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))
-#if defined __GNUC__ && __GNUC__ >= 2
-# 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; }))
-#else
-# define __bswap_64(x) __bswap_constant_64 (x)
#endif
-#endif /* _BITS_BYTESWAP_H */
+#include <bits/byteswap-common.h>
diff --git a/libc/sysdeps/linux/h8300/bits/byteswap.h b/libc/sysdeps/linux/h8300/bits/byteswap.h
index dc56467..781a4db 100644
--- a/libc/sysdeps/linux/h8300/bits/byteswap.h
+++ b/libc/sysdeps/linux/h8300/bits/byteswap.h
@@ -17,51 +17,24 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
-#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. We don't provide an assembler version
- because GCC is smart enough to generate optimal assembler output, and
- this allows for better cse. */
-#define __bswap_16(x) \
- ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
+#ifndef _ASM_BITS_BYTESWAP_H
+#define _ASM_BITS_BYTESWAP_H 1
-/* 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
-# define __bswap_32(x) \
- __extension__ \
- ({ unsigned int __v; \
- if (__builtin_constant_p (x)) \
- __v = __bswap_constant_32 (x); \
- else \
- __asm__ __volatile__ ("mov.l %0,er0\n\t" \
- "mov.b r0l,r1h\n\t" \
- "mov.b r0h,r1l\n\t" \
- "mov.w r1,e1\n\t" \
- "mov.w e0,r0\n\t" \
- "mov.b r0l,r1h\n\t" \
- "mov.b r0h,r1l\n\t" \
- "mov.l er1,%0" \
- : "=d" (__v) \
- : "0" (x): "er0","er1"); \
+#define __bswap_non_constant_32(x) \
+ __extension__ \
+ ({ unsigned int __v; \
+ __asm__ __volatile__ ("mov.l %0,er0\n\t" \
+ "mov.b r0l,r1h\n\t" \
+ "mov.b r0h,r1l\n\t" \
+ "mov.w r1,e1\n\t" \
+ "mov.w e0,r0\n\t" \
+ "mov.b r0l,r1h\n\t" \
+ "mov.b r0h,r1l\n\t" \
+ "mov.l er1,%0" \
+ : "=d" (__v) \
+ : "0" (x): "er0","er1"); \
__v; })
-#else
-# define __bswap_32(x) __bswap_constant_32 (x)
-#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
+
+#include <bits/byteswap-common.h>
diff --git a/libc/sysdeps/linux/i386/bits/byteswap.h b/libc/sysdeps/linux/i386/bits/byteswap.h
index 32b2192..052eda3 100644
--- a/libc/sysdeps/linux/i386/bits/byteswap.h
+++ b/libc/sysdeps/linux/i386/bits/byteswap.h
@@ -17,117 +17,40 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
-# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
-#endif
-
-#ifndef _BITS_BYTESWAP_H
-#define _BITS_BYTESWAP_H 1
+#ifndef _ASM_BITS_BYTESWAP_H
+#define _ASM_BITS_BYTESWAP_H 1
-/* Swap bytes in 16 bit value. */
-#define __bswap_constant_16(x) \
- ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
-
-#ifdef __GNUC__
-# if __GNUC__ >= 2
-# define __bswap_16(x) \
+#define __bswap_non_constant_16(x) \
(__extension__ \
- ({ register unsigned short int __v, __x = (x); \
- if (__builtin_constant_p (__x)) \
- __v = __bswap_constant_16 (__x); \
- else \
- __asm__ ("rorw $8, %w0" \
- : "=r" (__v) \
- : "0" (__x) \
- : "cc"); \
+ ({ register unsigned short int __v; \
+ __asm__ ("rorw $8, %w0" \
+ : "=r" (__v) \
+ : "0" (x) \
+ : "cc"); \
__v; }))
-# else
-/* This is better than nothing. */
-# define __bswap_16(x) \
- (__extension__ \
- ({ register unsigned short int __x = (x); __bswap_constant_16 (__x); }))
-# endif
-#else
-static __inline unsigned short int
-__bswap_16 (unsigned short int __bsx)
-{
- return __bswap_constant_16 (__bsx);
-}
-#endif
-
-/* Swap bytes in 32 bit value. */
-#define __bswap_constant_32(x) \
- ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
- (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
-#ifdef __GNUC__
-# if __GNUC__ >= 2
/* To swap the bytes in a word the i486 processors and up provide the
`bswap' opcode. On i386 we have to use three instructions. */
-# if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__ \
+#if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__ \
&& !defined __pentium4__
-# define __bswap_32(x) \
+# define __bswap_non_constant_32(x) \
(__extension__ \
- ({ register unsigned int __v, __x = (x); \
- if (__builtin_constant_p (__x)) \
- __v = __bswap_constant_32 (__x); \
- else \
- __asm__ ("rorw $8, %w0;" \
- "rorl $16, %0;" \
- "rorw $8, %w0" \
- : "=r" (__v) \
- : "0" (__x) \
- : "cc"); \
+ ({ register unsigned int __v; \
+ __asm__ ("rorw $8, %w0;" \
+ "rorl $16, %0;" \
+ "rorw $8, %w0" \
+ : "=r" (__v) \
+ : "0" (x) \
+ : "cc"); \
__v; }))
-# else
-# define __bswap_32(x) \
+#else
+# define __bswap_non_constant_32(x) \
(__extension__ \
- ({ register unsigned int __v, __x = (x); \
- if (__builtin_constant_p (__x)) \
- __v = __bswap_constant_32 (__x); \
- else \
- __asm__ ("bswap %0" : "=r" (__v) : "0" (__x)); \
+ ({ register unsigned int __v; \
+ __asm__ ("bswap %0" : "=r" (__v) : "0" (x)); \
__v; }))
-# endif
-# else
-# define __bswap_32(x) \
- (__extension__ \
- ({ register unsigned int __x = (x); __bswap_constant_32 (__x); }))
-# endif
-#else
-static __inline unsigned int
-__bswap_32 (unsigned int __bsx)
-{
- return __bswap_constant_32 (__bsx);
-}
#endif
-
-#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 long 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 */
+#include <bits/byteswap-common.h>
diff --git a/libc/sysdeps/linux/ia64/bits/byteswap.h b/libc/sysdeps/linux/ia64/bits/byteswap.h
index 6862aa0..346c82c 100644
--- a/libc/sysdeps/linux/ia64/bits/byteswap.h
+++ b/libc/sysdeps/linux/ia64/bits/byteswap.h
@@ -17,94 +17,36 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
-# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
-#endif
-
-#ifndef _BITS_BYTESWAP_H
-#define _BITS_BYTESWAP_H 1
-
-/* Swap bytes in 16 bit value. */
-#define __bswap_constant_16(x) \
- ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
+#ifndef _ASM_BITS_BYTESWAP_H
+#define _ASM_BITS_BYTESWAP_H 1
-#if defined __GNUC__ && __GNUC__ >= 2
-# define __bswap_16(x) \
+#define __bswap_non_constant_16(x) \
(__extension__ \
- ({ register unsigned short int __v, __x = (x); \
- if (__builtin_constant_p (x)) \
- __v = __bswap_constant_16 (__x); \
- else \
- __asm__ __volatile__ ("shl %0 = %1, 48 ;;" \
- "mux1 %0 = %0, @rev ;;" \
- : "=r" (__v) \
- : "r" ((unsigned short int) (__x))); \
+ ({ register unsigned short int __v; \
+ __asm__ __volatile__ ("shl %0 = %1, 48 ;;" \
+ "mux1 %0 = %0, @rev ;;" \
+ : "=r" (__v) \
+ : "r" ((unsigned short int) (x))); \
__v; }))
-#else
-/* This is better than nothing. */
-static __inline unsigned short int
-__bswap_16 (unsigned short int __bsx)
-{
- return __bswap_constant_16 (__bsx);
-}
-#endif
-
-/* 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
-# define __bswap_32(x) \
+#define __bswap_non_constant_32(x) \
(__extension__ \
- ({ register unsigned int __v, __x = (x); \
- if (__builtin_constant_p (x)) \
- __v = __bswap_constant_32 (__x); \
- else \
- __asm__ __volatile__ ("shl %0 = %1, 32 ;;" \
- "mux1 %0 = %0, @rev ;;" \
- : "=r" (__v) \
- : "r" ((unsigned int) (__x))); \
+ ({ register unsigned int __v; \
+ __asm__ __volatile__ ("shl %0 = %1, 32 ;;" \
+ "mux1 %0 = %0, @rev ;;" \
+ : "=r" (__v) \
+ : "r" ((unsigned int) (x))); \
__v; }))
-#else
-static __inline unsigned int
-__bswap_32 (unsigned int __bsx)
-{
- return __bswap_constant_32 (__bsx);
-}
-#endif
-
-/* Swap bytes in 64 bit value. */
-#define __bswap_constant_64(x) \
- ((((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 defined __GNUC__ && __GNUC__ >= 2
-# define __bswap_64(x) \
+#define __bswap_non_constant_64(x) \
(__extension__ \
- ({ register unsigned long int __v, __x = (x); \
- if (__builtin_constant_p (x)) \
- __v = __bswap_constant_64 (__x); \
- else \
- __asm__ __volatile__ ("mux1 %0 = %1, @rev ;;" \
- : "=r" (__v) \
- : "r" ((unsigned long int) (__x))); \
+ ({ register unsigned long int __v; \
+ __asm__ __volatile__ ("mux1 %0 = %1, @rev ;;" \
+ : "=r" (__v) \
+ : "r" ((unsigned long int) (x))); \
__v; }))
+#endif
-#else
-static __inline unsigned long int
-__bswap_64 (unsigned long int __bsx)
-{
- return __bswap_constant_64 (__bsx);
-}
#endif
-#endif /* _BITS_BYTESWAP_H */
+#include <bits/byteswap-common.h>
diff --git a/libc/sysdeps/linux/m68k/bits/byteswap.h b/libc/sysdeps/linux/m68k/bits/byteswap.h
index f5ec916..4884742 100644
--- a/libc/sysdeps/linux/m68k/bits/byteswap.h
+++ b/libc/sysdeps/linux/m68k/bits/byteswap.h
@@ -17,51 +17,21 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
-# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
-#endif
-
-#ifndef _BITS_BYTESWAP_H
-#define _BITS_BYTESWAP_H 1
-
-/* Swap bytes in 16 bit value. We don't provide an assembler version
- because GCC is smart enough to generate optimal assembler output, and
- this allows for better cse. */
-#define __bswap_16(x) \
- ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
-
-/* Swap bytes in 32 bit value. */
-#define __bswap_constant_32(x) \
- ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
- (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
+#ifndef _ASM_BITS_BYTESWAP_H
+#define _ASM_BITS_BYTESWAP_H 1
-#if defined __GNUC__ && __GNUC__ >= 2 && !defined __mcoldfire__
-# define __bswap_32(x) \
+#if !defined __mcoldfire__
+# define __bswap_non_constant_32(x) \
__extension__ \
({ unsigned int __bswap_32_v; \
- if (__builtin_constant_p (x)) \
- __bswap_32_v = __bswap_constant_32 (x); \
- else \
- __asm__ __volatile__ ("ror%.w %#8, %0;" \
- "swap %0;" \
- "ror%.w %#8, %0" \
- : "=d" (__bswap_32_v) \
- : "0" ((unsigned int) (x))); \
+ __asm__ __volatile__ ("ror%.w %#8, %0;" \
+ "swap %0;" \
+ "ror%.w %#8, %0" \
+ : "=d" (__bswap_32_v) \
+ : "0" ((unsigned int) (x))); \
__bswap_32_v; })
-#else
-# define __bswap_32(x) __bswap_constant_32 (x)
#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]; } __bswap_64_v, __bswap_64_r; \
- __bswap_64_v.__ll = (x); \
- __bswap_64_r.__l[0] = __bswap_32 (__bswap_64_v.__l[1]); \
- __bswap_64_r.__l[1] = __bswap_32 (__bswap_64_v.__l[0]); \
- __bswap_64_r.__ll; })
#endif
-#endif /* _BITS_BYTESWAP_H */
+#include <bits/byteswap-common.h>
diff --git a/libc/sysdeps/linux/v850/bits/byteswap.h b/libc/sysdeps/linux/v850/bits/byteswap.h
index 44fbee4..b2e1ddb 100644
--- a/libc/sysdeps/linux/v850/bits/byteswap.h
+++ b/libc/sysdeps/linux/v850/bits/byteswap.h
@@ -11,53 +11,21 @@
* 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. */
-#define __bswap_constant_16(x) \
- ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
+#ifndef _ASM_BITS_BYTESWAP_H
+#define _ASM_BITS_BYTESWAP_H 1
-#ifdef __GNUC__
-# define __bswap_16(x) \
+#define __bswap_non_constant_16(x) \
(__extension__ \
({ unsigned long int __bswap_16_v; \
- if (__builtin_constant_p (x)) \
- __bswap_16_v = __bswap_constant_16 (x); \
- else \
- __asm__ ("bsh %1, %0" : "=r" (__bswap_16_v) : "r" (x)); \
+ __asm__ ("bsh %1, %0" : "=r" (__bswap_16_v) : "r" (x)); \
__bswap_16_v; }))
-#else
-# define __bswap_16(x) __bswap_constant_16 (x)
-#endif
-/* Swap bytes in 32 bit value. */
-#define __bswap_constant_32(x) \
- ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
- (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
-
-#ifdef __GNUC__
-# define __bswap_32(x) \
+# define __bswap_non_constant_32(x) \
(__extension__ \
({ unsigned long int __bswap_32_v; \
- if (__builtin_constant_p (x)) \
- __bswap_32_v = __bswap_constant_32 (x); \
- else \
- __asm__ ("bsw %1, %0" : "=r" (__bswap_32_v) : "r" (x)); \
+ __asm__ ("bsw %1, %0" : "=r" (__bswap_32_v) : "r" (x)); \
__bswap_32_v; }))
-#else
-# define __bswap_32(x) __bswap_constant_32 (x)
-#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]; } __bswap_64_v, __bswap_64_r; \
- __bswap_64_v.__ll = (x); \
- __bswap_64_r.__l[0] = __bswap_32 (__bswap_64_v.__l[1]); \
- __bswap_64_r.__l[1] = __bswap_32 (__bswap_64_v.__l[0]); \
- __bswap_64_r.__ll; }))
#endif
+
+#include <bits/byteswap-common.h>
diff --git a/libc/sysdeps/linux/x86_64/bits/byteswap.h b/libc/sysdeps/linux/x86_64/bits/byteswap.h
index e1c861c..a9cf23d 100644
--- a/libc/sysdeps/linux/x86_64/bits/byteswap.h
+++ b/libc/sysdeps/linux/x86_64/bits/byteswap.h
@@ -17,117 +17,52 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
-# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
-#endif
-
-#ifndef _BITS_BYTESWAP_H
-#define _BITS_BYTESWAP_H 1
+#ifndef _ASM_BITS_BYTESWAP_H
+#define _ASM_BITS_BYTESWAP_H 1
#include <bits/wordsize.h>
-/* Swap bytes in 16 bit value. */
-#define __bswap_constant_16(x) \
- ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
-
-#if defined __GNUC__ && __GNUC__ >= 2
-# define __bswap_16(x) \
+#define __bswap_non_constant_16(x) \
(__extension__ \
- ({ register unsigned short int __v, __x = (x); \
- if (__builtin_constant_p (__x)) \
- __v = __bswap_constant_16 (__x); \
- else \
- __asm__ ("rorw $8, %w0" \
- : "=r" (__v) \
- : "0" (__x) \
- : "cc"); \
+ ({ register unsigned short int __v; \
+ __asm__ ("rorw $8, %w0" \
+ : "=r" (__v) \
+ : "0" (x) \
+ : "cc"); \
__v; }))
-#else
-/* This is better than nothing. */
-# define __bswap_16(x) \
- (__extension__ \
- ({ register unsigned short int __x = (x); __bswap_constant_16 (__x); }))
-#endif
-
-
-/* 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 || (defined __i486__ || defined __pentium__ \
- || defined __pentiumpro__ || defined __pentium4__ \
- || defined __k8__ || defined __athlon__ \
- || defined __k6__)
+#if __WORDSIZE == 64 || (defined __i486__ || defined __pentium__ \
+ || defined __pentiumpro__ || defined __pentium4__ \
+ || defined __k8__ || defined __athlon__ \
+ || defined __k6__)
/* To swap the bytes in a word the i486 processors and up provide the
`bswap' opcode. On i386 we have to use three instructions. */
-# define __bswap_32(x) \
+# define __bswap_non_constant_32(x) \
(__extension__ \
- ({ register unsigned int __v, __x = (x); \
- if (__builtin_constant_p (__x)) \
- __v = __bswap_constant_32 (__x); \
- else \
- __asm__ ("bswap %0" : "=r" (__v) : "0" (__x)); \
+ ({ register unsigned int __v; \
+ __asm__ ("bswap %0" : "=r" (__v) : "0" (x)); \
__v; }))
-# else
-# define __bswap_32(x) \
- (__extension__ \
- ({ register unsigned int __v, __x = (x); \
- if (__builtin_constant_p (__x)) \
- __v = __bswap_constant_32 (__x); \
- else \
- __asm__ ("rorw $8, %w0;" \
- "rorl $16, %0;" \
- "rorw $8, %w0" \
- : "=r" (__v) \
- : "0" (__x) \
- : "cc"); \
- __v; }))
-# endif
#else
-# define __bswap_32(x) \
+# define __bswap_non_constant_32(x) \
(__extension__ \
- ({ register unsigned int __x = (x); __bswap_constant_32 (__x); }))
+ ({ register unsigned int __v; \
+ __asm__ ("rorw $8, %w0;" \
+ "rorl $16, %0;" \
+ "rorw $8, %w0" \
+ : "=r" (__v) \
+ : "0" (x) \
+ : "cc"); \
+ __v; }))
#endif
-
-#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))
-
-# if __WORDSIZE == 64
-# define __bswap_64(x) \
+#if __WORDSIZE == 64
+# define __bswap_non_constant_64(x) \
(__extension__ \
- ({ register unsigned long __v, __x = (x); \
- if (__builtin_constant_p (__x)) \
- __v = __bswap_constant_64 (__x); \
- else \
- __asm__ ("bswap %q0" : "=r" (__v) : "0" (__x)); \
+ ({ register unsigned long __v; \
+ __asm__ ("bswap %q0" : "=r" (__v) : "0" (x)); \
__v; }))
-# else
-# 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
-#endif /* _BITS_BYTESWAP_H */
+#endif
+
+#include <bits/byteswap-common.h>
--
1.6.3.3
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