tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License
4 * as published by the Free Software Foundation; either version
5 * 2 of the License, or (at your option) any later version.
6 */
7#ifndef _ASM_POWERPC_SWAB_H
8#define _ASM_POWERPC_SWAB_H
9
10#include <uapi/asm/swab.h>
11
12#ifdef __GNUC__
13#ifndef __powerpc64__
14#endif /* __powerpc64__ */
15
16static __inline__ __u16 ld_le16(const volatile __u16 *addr)
17{
18 __u16 val;
19
20 __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
21 return val;
22}
23#define __arch_swab16p ld_le16
24
25static __inline__ void st_le16(volatile __u16 *addr, const __u16 val)
26{
27 __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
28}
29
30static inline void __arch_swab16s(__u16 *addr)
31{
32 st_le16(addr, *addr);
33}
34#define __arch_swab16s __arch_swab16s
35
36static __inline__ __u32 ld_le32(const volatile __u32 *addr)
37{
38 __u32 val;
39
40 __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
41 return val;
42}
43#define __arch_swab32p ld_le32
44
45static __inline__ void st_le32(volatile __u32 *addr, const __u32 val)
46{
47 __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
48}
49
50static inline void __arch_swab32s(__u32 *addr)
51{
52 st_le32(addr, *addr);
53}
54#define __arch_swab32s __arch_swab32s
55
56static inline __attribute_const__ __u16 __arch_swab16(__u16 value)
57{
58 __u16 result;
59
60 __asm__("rlwimi %0,%1,8,16,23"
61 : "=r" (result)
62 : "r" (value), "0" (value >> 8));
63 return result;
64}
65#define __arch_swab16 __arch_swab16
66
67static inline __attribute_const__ __u32 __arch_swab32(__u32 value)
68{
69 __u32 result;
70
71 __asm__("rlwimi %0,%1,24,16,23\n\t"
72 "rlwimi %0,%1,8,8,15\n\t"
73 "rlwimi %0,%1,24,0,7"
74 : "=r" (result)
75 : "r" (value), "0" (value >> 24));
76 return result;
77}
78#define __arch_swab32 __arch_swab32
79
80#endif /* __GNUC__ */
81#endif /* _ASM_POWERPC_SWAB_H */