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authorHarvey Harrison <harvey.harrison@gmail.com>2009-01-09 15:42:54 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-09 15:46:23 -0500
commite245b80c8357bf375f15c5f3b05ef8ae35e4fbc8 (patch)
tree3e54ef6db7350717cca2258c955f4d31c4cc2a3c /arch/parisc/include/asm/byteorder.h
parent8659c406ade32f47da2c95889094801921d6330a (diff)
parisc: introduce asm/swab.h
Fix for the linux/byteorder.h removal. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/parisc/include/asm/byteorder.h')
-rw-r--r--arch/parisc/include/asm/byteorder.h66
1 files changed, 2 insertions, 64 deletions
diff --git a/arch/parisc/include/asm/byteorder.h b/arch/parisc/include/asm/byteorder.h
index 83095c5bb379..da66029c4cb2 100644
--- a/arch/parisc/include/asm/byteorder.h
+++ b/arch/parisc/include/asm/byteorder.h
@@ -1,69 +1,7 @@
1#ifndef _PARISC_BYTEORDER_H 1#ifndef _PARISC_BYTEORDER_H
2#define _PARISC_BYTEORDER_H 2#define _PARISC_BYTEORDER_H
3 3
4#include <asm/types.h> 4#include <asm/swab.h>
5#include <linux/compiler.h> 5#include <linux/byteorder/big_endian.h>
6
7#define __BIG_ENDIAN
8#define __SWAB_64_THRU_32__
9
10static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
11{
12 __asm__("dep %0, 15, 8, %0\n\t" /* deposit 00ab -> 0bab */
13 "shd %%r0, %0, 8, %0" /* shift 000000ab -> 00ba */
14 : "=r" (x)
15 : "0" (x));
16 return x;
17}
18#define __arch_swab16 __arch_swab16
19
20static inline __attribute_const__ __u32 __arch_swab24(__u32 x)
21{
22 __asm__("shd %0, %0, 8, %0\n\t" /* shift xabcxabc -> cxab */
23 "dep %0, 15, 8, %0\n\t" /* deposit cxab -> cbab */
24 "shd %%r0, %0, 8, %0" /* shift 0000cbab -> 0cba */
25 : "=r" (x)
26 : "0" (x));
27 return x;
28}
29
30static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
31{
32 unsigned int temp;
33 __asm__("shd %0, %0, 16, %1\n\t" /* shift abcdabcd -> cdab */
34 "dep %1, 15, 8, %1\n\t" /* deposit cdab -> cbab */
35 "shd %0, %1, 8, %0" /* shift abcdcbab -> dcba */
36 : "=r" (x), "=&r" (temp)
37 : "0" (x));
38 return x;
39}
40#define __arch_swab32 __arch_swab32
41
42#if BITS_PER_LONG > 32
43/*
44** From "PA-RISC 2.0 Architecture", HP Professional Books.
45** See Appendix I page 8 , "Endian Byte Swapping".
46**
47** Pretty cool algorithm: (* == zero'd bits)
48** PERMH 01234567 -> 67452301 into %0
49** HSHL 67452301 -> 7*5*3*1* into %1
50** HSHR 67452301 -> *6*4*2*0 into %0
51** OR %0 | %1 -> 76543210 into %0 (all done!)
52*/
53static inline __attribute_const__ __u64 __arch_swab64(__u64 x)
54{
55 __u64 temp;
56 __asm__("permh,3210 %0, %0\n\t"
57 "hshl %0, 8, %1\n\t"
58 "hshr,u %0, 8, %0\n\t"
59 "or %1, %0, %0"
60 : "=r" (x), "=&r" (temp)
61 : "0" (x));
62 return x;
63}
64#define __arch_swab64 __arch_swab64
65#endif /* BITS_PER_LONG > 32 */
66
67#include <linux/byteorder.h>
68 6
69#endif /* _PARISC_BYTEORDER_H */ 7#endif /* _PARISC_BYTEORDER_H */