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Source at commit 1319 created 12 years 11 months ago. By meklort, Makefile update | |
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1 | /*␊ |
2 | * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_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. Please obtain a copy of the License at␊ |
10 | * http://www.opensource.apple.com/apsl/ and read it before using this␊ |
11 | * file.␊ |
12 | * ␊ |
13 | * The Original Code and all software distributed under the License are␊ |
14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
18 | * Please see the License for the specific language governing rights and␊ |
19 | * limitations under the License.␊ |
20 | * ␊ |
21 | * @APPLE_LICENSE_HEADER_END@␊ |
22 | */␊ |
23 | /* Copyright (c) 1991 NeXT Computer, Inc. All rights reserved.␊ |
24 | *␊ |
25 | *␉File:␉architecture/i386/reg_help.h␊ |
26 | *␉Author:␉Mike DeMoney, NeXT Computer, Inc.␊ |
27 | * Modified for i386 by: Bruce Martin, NeXT Computer, Inc.␊ |
28 | *␊ |
29 | *␉This header file defines cpp macros useful for defining␊ |
30 | *␉machine register and doing machine-level operations.␊ |
31 | *␊ |
32 | * HISTORY␊ |
33 | * 10-Mar-92 Bruce Martin (bmartin@next.com)␊ |
34 | *␉Adapted to i386␊ |
35 | * 23-Jan-91 Mike DeMoney (mike@next.com)␊ |
36 | *␉Created.␊ |
37 | */␊ |
38 | ␊ |
39 | #ifndef␉_ARCH_I386_REG_HELP_H_␊ |
40 | #define␉_ARCH_I386_REG_HELP_H_␊ |
41 | ␊ |
42 | /* Bitfield definition aid */␊ |
43 | #define␉BITS_WIDTH(msb, lsb)␉((msb)-(lsb)+1)␊ |
44 | #define␉BIT_WIDTH(pos)␉␉(1)␉/* mostly to record the position */␊ |
45 | ␊ |
46 | /* Mask creation */␊ |
47 | #define␉MKMASK(width, offset)␉(((unsigned)-1)>>(32-(width))<<(offset))␊ |
48 | #define␉BITSMASK(msb, lsb)␉MKMASK(BITS_WIDTH(msb, lsb), lsb & 0x1f)␊ |
49 | #define␉BITMASK(pos)␉␉MKMASK(BIT_WIDTH(pos), pos & 0x1f)␊ |
50 | ␊ |
51 | /* Register addresses */␊ |
52 | #if␉__ASSEMBLER__␊ |
53 | # define␉REG_ADDR(type, addr)␉(addr)␊ |
54 | #else␉/* __ASSEMBLER__ */␊ |
55 | # define␉REG_ADDR(type, addr)␉(*(volatile type *)(addr))␊ |
56 | #endif␉/* __ASSEMBLER__ */␊ |
57 | ␊ |
58 | /* Cast a register to be an unsigned */␊ |
59 | #define␉CONTENTS(foo)␉(*(unsigned *) &(foo))␊ |
60 | ␊ |
61 | /* Stack pointer must always be a multiple of 4 */␊ |
62 | #define␉STACK_INCR␉4␊ |
63 | #define␉ROUND_FRAME(x)␉((((unsigned)(x)) + STACK_INCR - 1) & ~(STACK_INCR-1))␊ |
64 | ␊ |
65 | /* STRINGIFY -- perform all possible substitutions, then stringify */␊ |
66 | #define␉__STR(x)␉#x␉␉/* just a helper macro */␊ |
67 | #define␉STRINGIFY(x)␉__STR(x)␊ |
68 | ␊ |
69 | /*␊ |
70 | * REG_PAIR_DEF -- define a register pair␊ |
71 | * Register pairs are appropriately aligned to allow access via␊ |
72 | * ld.d and st.d.␊ |
73 | *␊ |
74 | * Usage:␊ |
75 | *␉struct foo {␊ |
76 | *␉␉REG_PAIR_DEF(␊ |
77 | *␉␉␉bar_t *,␉barp,␊ |
78 | *␉␉␉afu_t,␉␉afu␊ |
79 | *␉␉);␊ |
80 | *␉};␊ |
81 | *␊ |
82 | * Access to individual entries of the pair is via the REG_PAIR␊ |
83 | * macro (below).␊ |
84 | */␊ |
85 | #define␉REG_PAIR_DEF(type0, name0, type1, name1)␉␉\␊ |
86 | ␉struct {␉␉␉␉␉␉\␊ |
87 | ␉␉type0␉name0 __attribute__(( aligned(8) ));␉\␊ |
88 | ␉␉type1␉name1;␉␉␉␉␉\␊ |
89 | ␉} name0##_##name1␊ |
90 | ␊ |
91 | /*␊ |
92 | * REG_PAIR -- Macro to define names for accessing individual registers␊ |
93 | * of register pairs.␊ |
94 | *␊ |
95 | * Usage:␊ |
96 | *␉arg0 is first element of pair␊ |
97 | *␉arg1 is second element of pair␊ |
98 | *␉arg2 is desired element of pair␊ |
99 | * eg:␊ |
100 | *␉#define␉foo_barp␉REG_PAIR(barp, afu, afu)␊ |
101 | */␊ |
102 | #define␉REG_PAIR(name0, name1, the_name)␉␉␉\␊ |
103 | ␉name0##_##name1.the_name␊ |
104 | ␊ |
105 | #endif␉/* _ARCH_I386_REG_HELP_H_ */␊ |
106 |