Chameleon

Chameleon Svn Source Tree

Root/branches/rewrite/i386/include/libkern/ppc/OSByteOrder.h

Source at commit 1129 created 12 years 11 months ago.
By meklort, Change options.o so that it reloads the system config as well. Also change it so that it uses that config for variables (NOTE: if the calue exists in chameleonConfig, it's used instead.
1/*␊
2 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.␊
3 *␊
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@␊
5 * ␊
6 * This file contains Original Code and/or Modifications of Original Code␊
7 * as defined in and that are subject to the Apple Public Source License␊
8 * Version 2.0 (the 'License'). You may not use this file except in␊
9 * compliance with the License. The rights granted to you under the License␊
10 * may not be used to create, or enable the creation or redistribution of,␊
11 * unlawful or unlicensed copies of an Apple operating system, or to␊
12 * circumvent, violate, or enable the circumvention or violation of, any␊
13 * terms of an Apple operating system software license agreement.␊
14 * ␊
15 * Please obtain a copy of the License at␊
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.␊
17 * ␊
18 * The Original Code and all software distributed under the License are␊
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊
23 * Please see the License for the specific language governing rights and␊
24 * limitations under the License.␊
25 * ␊
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@␊
27 */␊
28␊
29#ifndef _OS_OSBYTEORDERPPC_H␊
30#define _OS_OSBYTEORDERPPC_H␊
31␊
32#include <stdint.h>␊
33␊
34#if !defined(OS_INLINE)␊
35# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L␊
36# define OS_INLINE static inline␊
37# elif defined(__MWERKS__) || defined(__cplusplus)␊
38# define OS_INLINE static inline␊
39# else␊
40# define OS_INLINE static __inline__␊
41# endif␊
42#endif␊
43␊
44/* Functions for byte reversed loads. */␊
45␊
46OS_INLINE␊
47uint16_t␊
48OSReadSwapInt16(␊
49 const volatile void * base,␊
50 uintptr_t byteOffset␊
51)␊
52{␊
53 uint16_t result;␊
54 volatile uint16_t *addr = (volatile uint16_t *)((uintptr_t)base + byteOffset);␊
55␊
56#if defined(__llvm__)␊
57 result = *addr;␊
58 result = ((result << 8) | (result >> 8));␊
59#else␊
60 __asm__ ("lhbrx %0, %2, %1"␊
61 : "=r" (result)␊
62 : "r" (base), "bO" (byteOffset), "m" (*addr));␊
63#endif␊
64␊
65 return result;␊
66}␊
67␊
68OS_INLINE␊
69uint32_t␊
70OSReadSwapInt32(␊
71 const volatile void * base,␊
72 uintptr_t byteOffset␊
73)␊
74{␊
75 uint32_t result;␊
76 volatile uint32_t *addr = (volatile uint32_t *)((uintptr_t)base + byteOffset);␊
77␊
78#if defined(__llvm__)␊
79 result = __builtin_bswap32(*addr);␊
80#else␊
81 __asm__ ("lwbrx %0, %2, %1"␊
82 : "=r" (result)␊
83 : "r" (base), "bO" (byteOffset), "m" (*addr));␊
84#endif␊
85␊
86 return result;␊
87}␊
88␊
89OS_INLINE␊
90uint64_t␊
91OSReadSwapInt64(␊
92 const volatile void * base,␊
93 uintptr_t byteOffset␊
94)␊
95{␊
96 volatile uint64_t *addr = (volatile uint64_t *)((uintptr_t)base + byteOffset);␊
97 union {␊
98 uint64_t u64;␊
99 uint32_t u32[2];␊
100 } u;␊
101␊
102#if defined(__llvm__)␊
103 u.u64 = __builtin_bswap64(*addr);␊
104#else␊
105 __asm__ ("lwbrx %0, %3, %2\n\t"␊
106 "lwbrx %1, %4, %2"␊
107 : "=&r" (u.u32[1]), "=r" (u.u32[0])␊
108 : "r" (base), "bO" (byteOffset), "b" (byteOffset + 4), "m" (*addr));␊
109#endif␊
110␊
111 return u.u64;␊
112}␊
113␊
114/* Functions for byte reversed stores. */␊
115␊
116OS_INLINE␊
117void␊
118OSWriteSwapInt16(␊
119 volatile void * base,␊
120 uintptr_t byteOffset,␊
121 uint16_t data␊
122)␊
123{␊
124 volatile uint16_t *addr = (volatile uint16_t *)((uintptr_t)base + byteOffset);␊
125␊
126#if defined(__llvm__)␊
127 *addr = ((data >> 8) | (data << 8));␊
128#else␊
129 __asm__ ("sthbrx %1, %3, %2"␊
130 : "=m" (*addr)␊
131 : "r" (data), "r" (base), "bO" (byteOffset));␊
132#endif␊
133}␊
134␊
135OS_INLINE␊
136void␊
137OSWriteSwapInt32(␊
138 volatile void * base,␊
139 uintptr_t byteOffset,␊
140 uint32_t data␊
141)␊
142{␊
143 volatile uint32_t *addr = (volatile uint32_t *)((uintptr_t)base + byteOffset);␊
144␊
145#if defined(__llvm__)␊
146 *addr = __builtin_bswap32(data);␊
147#else␊
148 __asm__ ("stwbrx %1, %3, %2"␊
149 : "=m" (*addr)␊
150 : "r" (data), "r" (base), "bO" (byteOffset));␊
151#endif␊
152}␊
153␊
154OS_INLINE␊
155void␊
156OSWriteSwapInt64(␊
157 volatile void * base,␊
158 uintptr_t byteOffset,␊
159 uint64_t data␊
160)␊
161{␊
162 volatile uint64_t *addr = (volatile uint64_t *)((uintptr_t)base + byteOffset);␊
163␊
164#if defined(__llvm__)␊
165 *addr = __builtin_bswap64(data);␊
166#else␊
167 uint32_t hi = (uint32_t)(data >> 32);␊
168 uint32_t lo = (uint32_t)(data & 0xffffffff);␊
169␊
170 __asm__ ("stwbrx %1, %4, %3\n\t"␊
171 "stwbrx %2, %5, %3"␊
172 : "=m" (*addr)␊
173 : "r" (lo), "r" (hi), "r" (base), "bO" (byteOffset), "b" (byteOffset + 4));␊
174#endif␊
175}␊
176␊
177/* Generic byte swapping functions. */␊
178␊
179OS_INLINE␊
180uint16_t␊
181_OSSwapInt16(␊
182 uint16_t data␊
183)␊
184{␊
185 return OSReadSwapInt16(&data, 0);␊
186}␊
187␊
188OS_INLINE␊
189uint32_t␊
190_OSSwapInt32(␊
191 uint32_t data␊
192)␊
193{␊
194 return OSReadSwapInt32(&data, 0);␊
195}␊
196␊
197OS_INLINE␊
198uint64_t␊
199_OSSwapInt64(␊
200 uint64_t data␊
201)␊
202{␊
203 return OSReadSwapInt64(&data, 0);␊
204}␊
205␊
206#endif /* ! _OS_OSBYTEORDERPPC_H */␊
207

Archive Download this file

Revision: 1129