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author | Len Brown <len.brown@intel.com> | 2008-10-22 23:57:26 -0400 |
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committer | Len Brown <len.brown@intel.com> | 2008-10-23 00:11:07 -0400 |
commit | 057316cc6a5b521b332a1d7ccc871cd60c904c74 (patch) | |
tree | 4333e608da237c73ff69b10878025cca96dcb4c8 /arch/parisc/include/asm/byteorder.h | |
parent | panasonic-laptop: fix build (diff) | |
parent | binfmt_elf_fdpic: Update for cputime changes. (diff) | |
download | linux-dev-057316cc6a5b521b332a1d7ccc871cd60c904c74.tar.xz linux-dev-057316cc6a5b521b332a1d7ccc871cd60c904c74.zip |
Merge branch 'linus' into test
Conflicts:
MAINTAINERS
arch/x86/kernel/acpi/boot.c
arch/x86/kernel/acpi/sleep.c
drivers/acpi/Kconfig
drivers/pnp/Makefile
drivers/pnp/quirks.c
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/parisc/include/asm/byteorder.h')
-rw-r--r-- | arch/parisc/include/asm/byteorder.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/byteorder.h b/arch/parisc/include/asm/byteorder.h new file mode 100644 index 000000000000..db148313de5d --- /dev/null +++ b/arch/parisc/include/asm/byteorder.h @@ -0,0 +1,82 @@ +#ifndef _PARISC_BYTEORDER_H +#define _PARISC_BYTEORDER_H + +#include <asm/types.h> +#include <linux/compiler.h> + +#ifdef __GNUC__ + +static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x) +{ + __asm__("dep %0, 15, 8, %0\n\t" /* deposit 00ab -> 0bab */ + "shd %%r0, %0, 8, %0" /* shift 000000ab -> 00ba */ + : "=r" (x) + : "0" (x)); + return x; +} + +static __inline__ __attribute_const__ __u32 ___arch__swab24(__u32 x) +{ + __asm__("shd %0, %0, 8, %0\n\t" /* shift xabcxabc -> cxab */ + "dep %0, 15, 8, %0\n\t" /* deposit cxab -> cbab */ + "shd %%r0, %0, 8, %0" /* shift 0000cbab -> 0cba */ + : "=r" (x) + : "0" (x)); + return x; +} + +static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x) +{ + unsigned int temp; + __asm__("shd %0, %0, 16, %1\n\t" /* shift abcdabcd -> cdab */ + "dep %1, 15, 8, %1\n\t" /* deposit cdab -> cbab */ + "shd %0, %1, 8, %0" /* shift abcdcbab -> dcba */ + : "=r" (x), "=&r" (temp) + : "0" (x)); + return x; +} + + +#if BITS_PER_LONG > 32 +/* +** From "PA-RISC 2.0 Architecture", HP Professional Books. +** See Appendix I page 8 , "Endian Byte Swapping". +** +** Pretty cool algorithm: (* == zero'd bits) +** PERMH 01234567 -> 67452301 into %0 +** HSHL 67452301 -> 7*5*3*1* into %1 +** HSHR 67452301 -> *6*4*2*0 into %0 +** OR %0 | %1 -> 76543210 into %0 (all done!) +*/ +static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x) { + __u64 temp; + __asm__("permh,3210 %0, %0\n\t" + "hshl %0, 8, %1\n\t" + "hshr,u %0, 8, %0\n\t" + "or %1, %0, %0" + : "=r" (x), "=&r" (temp) + : "0" (x)); + return x; +} +#define __arch__swab64(x) ___arch__swab64(x) +#define __BYTEORDER_HAS_U64__ +#elif !defined(__STRICT_ANSI__) +static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x) +{ + __u32 t1 = ___arch__swab32((__u32) x); + __u32 t2 = ___arch__swab32((__u32) (x >> 32)); + return (((__u64) t1 << 32) | t2); +} +#define __arch__swab64(x) ___arch__swab64(x) +#define __BYTEORDER_HAS_U64__ +#endif + +#define __arch__swab16(x) ___arch__swab16(x) +#define __arch__swab24(x) ___arch__swab24(x) +#define __arch__swab32(x) ___arch__swab32(x) + +#endif /* __GNUC__ */ + +#include <linux/byteorder/big_endian.h> + +#endif /* _PARISC_BYTEORDER_H */ |