1#ifndef _PARISC_BYTEORDER_H
2#define _PARISC_BYTEORDER_H
3
4#include <asm/types.h>
5#include <linux/compiler.h>
6
7#ifdef __GNUC__
8
9static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
10{
11	__asm__("dep %0, 15, 8, %0\n\t"		/* deposit 00ab -> 0bab */
12		"shd %%r0, %0, 8, %0"		/* shift 000000ab -> 00ba */
13		: "=r" (x)
14		: "0" (x));
15	return x;
16}
17
18static __inline__ __attribute_const__ __u32 ___arch__swab24(__u32 x)
19{
20	__asm__("shd %0, %0, 8, %0\n\t"		/* shift xabcxabc -> cxab */
21		"dep %0, 15, 8, %0\n\t"		/* deposit cxab -> cbab */
22		"shd %%r0, %0, 8, %0"		/* shift 0000cbab -> 0cba */
23		: "=r" (x)
24		: "0" (x));
25	return x;
26}
27
28static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
29{
30	unsigned int temp;
31	__asm__("shd %0, %0, 16, %1\n\t"	/* shift abcdabcd -> cdab */
32		"dep %1, 15, 8, %1\n\t"		/* deposit cdab -> cbab */
33		"shd %0, %1, 8, %0"		/* shift abcdcbab -> dcba */
34		: "=r" (x), "=&r" (temp)
35		: "0" (x));
36	return x;
37}
38
39
40#if BITS_PER_LONG > 32
41/*
42** From "PA-RISC 2.0 Architecture", HP Professional Books.
43** See Appendix I page 8 , "Endian Byte Swapping".
44**
45** Pretty cool algorithm: (* == zero'd bits)
46**      PERMH   01234567 -> 67452301 into %0
47**      HSHL    67452301 -> 7*5*3*1* into %1
48**      HSHR    67452301 -> *6*4*2*0 into %0
49**      OR      %0 | %1  -> 76543210 into %0 (all done!)
50*/
51static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x) {
52	__u64 temp;
53	__asm__("permh,3210 %0, %0\n\t"
54		"hshl %0, 8, %1\n\t"
55		"hshr,u %0, 8, %0\n\t"
56		"or %1, %0, %0"
57		: "=r" (x), "=&r" (temp)
58		: "0" (x));
59	return x;
60}
61#define __arch__swab64(x) ___arch__swab64(x)
62#define __BYTEORDER_HAS_U64__
63#elif !defined(__STRICT_ANSI__)
64static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x)
65{
66	__u32 t1 = ___arch__swab32((__u32) x);
67	__u32 t2 = ___arch__swab32((__u32) (x >> 32));
68	return (((__u64) t1 << 32) | t2);
69}
70#define __arch__swab64(x) ___arch__swab64(x)
71#define __BYTEORDER_HAS_U64__
72#endif
73
74#define __arch__swab16(x) ___arch__swab16(x)
75#define __arch__swab24(x) ___arch__swab24(x)
76#define __arch__swab32(x) ___arch__swab32(x)
77
78#endif /* __GNUC__ */
79
80#include <linux/byteorder/big_endian.h>
81
82#endif /* _PARISC_BYTEORDER_H */
83