import swab.h arch implementation form linux v2.3.37

this will avoid __bswapsi2 issue see with gcc 4.5.1

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

7 files changed, 281 insertions, 77 deletions

diff --git a/arch/arm/include/asm/swab.h b/arch/arm/include/asm/swab.h
new file mode 100644
index 0000000000..9997ad20ef
--- /dev/null
+++ b/arch/arm/include/asm/swab.h
@@ -0,0 +1,69 @@
+/*
+ *  arch/arm/include/asm/byteorder.h
+ *
+ * ARM Endian-ness.  In little endian mode, the data bus is connected such
+ * that byte accesses appear as:
+ *  0 = d0...d7, 1 = d8...d15, 2 = d16...d23, 3 = d24...d31
+ * and word accesses (data or instruction) appear as:
+ *  d0...d31
+ *
+ * When in big endian mode, byte accesses appear as:
+ *  0 = d24...d31, 1 = d16...d23, 2 = d8...d15, 3 = d0...d7
+ * and word accesses (data or instruction) appear as:
+ *  d0...d31
+ */
+#ifndef __ASM_ARM_SWAB_H
+#define __ASM_ARM_SWAB_H
+
+#include <linux/compiler.h>
+#include <linux/types.h>
+
+#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
+#  define __SWAB_64_THRU_32__
+#endif
+
+#if defined(__KERNEL__) && __LINUX_ARM_ARCH__ >= 6
+
+static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
+{
+	__asm__ ("rev16 %0, %1" : "=r" (x) : "r" (x));
+	return x;
+}
+#define __arch_swab16 __arch_swab16
+
+static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
+{
+	__asm__ ("rev %0, %1" : "=r" (x) : "r" (x));
+	return x;
+}
+#define __arch_swab32 __arch_swab32
+
+#else
+
+static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
+{
+	__u32 t;
+
+#ifndef __thumb__
+	if (!__builtin_constant_p(x)) {
+		/*
+		 * The compiler needs a bit of a hint here to always do the
+		 * right thing and not screw it up to different degrees
+		 * depending on the gcc version.
+		 */
+		asm ("eor\t%0, %1, %1, ror #16" : "=r" (t) : "r" (x));
+	} else
+#endif
+		t = x ^ ((x << 16) | (x >> 16)); /* eor r1,r0,r0,ror #16 */
+
+	x = (x << 24) | (x >> 8);		/* mov r0,r0,ror #8      */
+	t &= ~0x00FF0000;			/* bic r1,r1,#0x00FF0000 */
+	x ^= (t >> 8);				/* eor r0,r0,r1,lsr #8   */
+
+	return x;
+}
+#define __arch_swab32 __arch_swab32
+
+#endif
+
+#endif
diff --git a/arch/blackfin/include/asm/bitsperlong.h b/arch/blackfin/include/asm/bitsperlong.h
new file mode 100644
index 0000000000..6dc0bb0c13
--- /dev/null
+++ b/arch/blackfin/include/asm/bitsperlong.h
@@ -0,0 +1 @@
+#include <asm-generic/bitsperlong.h>
diff --git a/arch/blackfin/include/asm/swab.h b/arch/blackfin/include/asm/swab.h
new file mode 100644
index 0000000000..89de6507ca
--- /dev/null
+++ b/arch/blackfin/include/asm/swab.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _BLACKFIN_SWAB_H
+#define _BLACKFIN_SWAB_H
+
+#include <linux/types.h>
+#include <asm-generic/swab.h>
+
+#ifdef __GNUC__
+
+static __inline__ __attribute_const__ __u32 __arch_swahb32(__u32 xx)
+{
+	__u32 tmp;
+	__asm__("%1 = %0 >> 8 (V);\n\t"
+		"%0 = %0 << 8 (V);\n\t"
+		"%0 = %0 | %1;\n\t"
+		: "+d"(xx), "=&d"(tmp));
+	return xx;
+}
+#define __arch_swahb32 __arch_swahb32
+
+static __inline__ __attribute_const__ __u32 __arch_swahw32(__u32 xx)
+{
+	__u32 rv;
+	__asm__("%0 = PACK(%1.L, %1.H);\n\t": "=d"(rv): "d"(xx));
+	return rv;
+}
+#define __arch_swahw32 __arch_swahw32
+
+static __inline__ __attribute_const__ __u32 __arch_swab32(__u32 xx)
+{
+	return __arch_swahb32(__arch_swahw32(xx));
+}
+#define __arch_swab32 __arch_swab32
+
+static __inline__ __attribute_const__ __u16 __arch_swab16(__u16 xx)
+{
+	__u32 xw = xx;
+	__asm__("%0 <<= 8;\n	%0.L = %0.L + %0.H (NS);\n": "+d"(xw));
+	return (__u16)xw;
+}
+#define __arch_swab16 __arch_swab16
+
+#endif /* __GNUC__ */
+
+#endif				/* _BLACKFIN_SWAB_H */
diff --git a/arch/ppc/include/asm/byteorder.h b/arch/ppc/include/asm/byteorder.h
index d3e719b8a5..aa6cc4fac9 100644
--- a/arch/ppc/include/asm/byteorder.h
+++ b/arch/ppc/include/asm/byteorder.h
@@ -1,79 +1,12 @@
-#ifndef _PPC_BYTEORDER_H
-#define _PPC_BYTEORDER_H
-
-#include <asm/types.h>
-
-#ifdef __GNUC__
-
-extern __inline__ unsigned ld_le16(const volatile unsigned short *addr)
-{
-	unsigned val;
-
-	__asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
-	return val;
-}
-
-extern __inline__ void st_le16(volatile unsigned short *addr, const unsigned val)
-{
-	__asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
-}
-
-extern __inline__ unsigned ld_le32(const volatile unsigned *addr)
-{
-	unsigned val;
-
-	__asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
-	return val;
-}
-
-extern __inline__ void st_le32(volatile unsigned *addr, const unsigned val)
-{
-	__asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
-}
-
-/* alas, egcs sounds like it has a bug in this code that doesn't use the
-   inline asm correctly, and can cause file corruption. Until I hear that
-   it's fixed, I can live without the extra speed. I hope. */
-#if !(__GNUC__ >= 2 && __GNUC_MINOR__ >= 90)
-static __inline__ __attribute__((const)) __u16 ___arch__swab16(__u16 value)
-{
-	__u16 result;
-
-	__asm__("rlwimi %0,%1,8,16,23"
-	    : "=r" (result)
-	    : "r" (value), "0" (value >> 8));
-	return result;
-}
-
-static __inline__ __attribute__((const)) __u32 ___arch__swab32(__u32 value)
-{
-	__u32 result;
-
-	__asm__("rlwimi %0,%1,24,16,23\n\t"
-	    "rlwimi %0,%1,8,8,15\n\t"
-	    "rlwimi %0,%1,24,0,7"
-	    : "=r" (result)
-	    : "r" (value), "0" (value >> 24));
-	return result;
-}
-#define __arch__swab32(x) ___arch__swab32(x)
-#define __arch__swab16(x) ___arch__swab16(x)
-
-#endif
-
-/* The same, but returns converted value from the location pointer by addr. */
-#define __arch__swab16p(addr) ld_le16(addr)
-#define __arch__swab32p(addr) ld_le32(addr)
-
-/* The same, but do the conversion in situ, ie. put the value back to addr. */
-#define __arch__swab16s(addr) st_le16(addr,*addr)
-#define __arch__swab32s(addr) st_le32(addr,*addr)
-
-#endif /* __GNUC__ */
-
-#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
-#define __BYTEORDER_HAS_U64__
-#endif
+#ifndef _ASM_POWERPC_BYTEORDER_H
+#define _ASM_POWERPC_BYTEORDER_H
+
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
 #include <linux/byteorder/big_endian.h>
 
-#endif /* _PPC_BYTEORDER_H */
+#endif /* _ASM_POWERPC_BYTEORDER_H */
diff --git a/arch/ppc/include/asm/swab.h b/arch/ppc/include/asm/swab.h
new file mode 100644
index 0000000000..c581e3ef73
--- /dev/null
+++ b/arch/ppc/include/asm/swab.h
@@ -0,0 +1,90 @@
+#ifndef _ASM_POWERPC_SWAB_H
+#define _ASM_POWERPC_SWAB_H
+
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+
+#ifdef __GNUC__
+
+#ifndef __powerpc64__
+#define __SWAB_64_THRU_32__
+#endif /* __powerpc64__ */
+
+#ifdef __KERNEL__
+
+static __inline__ __u16 ld_le16(const volatile __u16 *addr)
+{
+	__u16 val;
+
+	__asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
+	return val;
+}
+#define __arch_swab16p ld_le16
+
+static __inline__ void st_le16(volatile __u16 *addr, const __u16 val)
+{
+	__asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
+}
+
+static inline void __arch_swab16s(__u16 *addr)
+{
+	st_le16(addr, *addr);
+}
+#define __arch_swab16s __arch_swab16s
+
+static __inline__ __u32 ld_le32(const volatile __u32 *addr)
+{
+	__u32 val;
+
+	__asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
+	return val;
+}
+#define __arch_swab32p ld_le32
+
+static __inline__ void st_le32(volatile __u32 *addr, const __u32 val)
+{
+	__asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
+}
+
+static inline void __arch_swab32s(__u32 *addr)
+{
+	st_le32(addr, *addr);
+}
+#define __arch_swab32s __arch_swab32s
+
+static inline __attribute_const__ __u16 __arch_swab16(__u16 value)
+{
+	__u16 result;
+
+	__asm__("rlwimi %0,%1,8,16,23"
+	    : "=r" (result)
+	    : "r" (value), "0" (value >> 8));
+	return result;
+}
+#define __arch_swab16 __arch_swab16
+
+static inline __attribute_const__ __u32 __arch_swab32(__u32 value)
+{
+	__u32 result;
+
+	__asm__("rlwimi %0,%1,24,16,23\n\t"
+	    "rlwimi %0,%1,8,8,15\n\t"
+	    "rlwimi %0,%1,24,0,7"
+	    : "=r" (result)
+	    : "r" (value), "0" (value >> 24));
+	return result;
+}
+#define __arch_swab32 __arch_swab32
+
+#endif /* __KERNEL__ */
+
+#endif /* __GNUC__ */
+
+#endif /* _ASM_POWERPC_SWAB_H */
diff --git a/arch/sandbox/include/asm/swab.h b/arch/sandbox/include/asm/swab.h
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/arch/sandbox/include/asm/swab.h
diff --git a/arch/x86/include/asm/swab.h b/arch/x86/include/asm/swab.h
new file mode 100644
index 0000000000..557cd9f006
--- /dev/null
+++ b/arch/x86/include/asm/swab.h
@@ -0,0 +1,61 @@
+#ifndef _ASM_X86_SWAB_H
+#define _ASM_X86_SWAB_H
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+
+static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
+{
+#ifdef __i386__
+# ifdef CONFIG_X86_BSWAP
+	asm("bswap %0" : "=r" (val) : "0" (val));
+# else
+	asm("xchgb %b0,%h0\n\t"	/* swap lower bytes	*/
+	    "rorl $16,%0\n\t"	/* swap words		*/
+	    "xchgb %b0,%h0"	/* swap higher bytes	*/
+	    : "=q" (val)
+	    : "0" (val));
+# endif
+
+#else /* __i386__ */
+	asm("bswapl %0"
+	    : "=r" (val)
+	    : "0" (val));
+#endif
+	return val;
+}
+#define __arch_swab32 __arch_swab32
+
+static inline __attribute_const__ __u64 __arch_swab64(__u64 val)
+{
+#ifdef __i386__
+	union {
+		struct {
+			__u32 a;
+			__u32 b;
+		} s;
+		__u64 u;
+	} v;
+	v.u = val;
+# ifdef CONFIG_X86_BSWAP
+	asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
+	    : "=r" (v.s.a), "=r" (v.s.b)
+	    : "0" (v.s.a), "1" (v.s.b));
+# else
+	v.s.a = __arch_swab32(v.s.a);
+	v.s.b = __arch_swab32(v.s.b);
+	asm("xchgl %0,%1"
+	    : "=r" (v.s.a), "=r" (v.s.b)
+	    : "0" (v.s.a), "1" (v.s.b));
+# endif
+	return v.u;
+#else /* __i386__ */
+	asm("bswapq %0"
+	    : "=r" (val)
+	    : "0" (val));
+	return val;
+#endif
+}
+#define __arch_swab64 __arch_swab64
+
+#endif /* _ASM_X86_SWAB_H */