1 /* $OpenBSD: regdef.h,v 1.3 2005/08/07 07:29:44 miod Exp $ */
3 /*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ralph Campbell. This file is derived from the MIPS RISC
9 * Architecture book by Gerry Kane.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)regdef.h 8.1 (Berkeley) 6/10/93
36 */
37 #ifndef _MIPS_REGDEF_H_
38 #define _MIPS_REGDEF_H_
40 #if (_MIPS_SIM == _ABI64) && !defined(__mips_n64)
41 #define __mips_n64 1
42 #endif
43 #if (_MIPS_SIM == _ABIN32) && !defined(__mips_n32)
44 #define __mips_n32 1
45 #endif
47 #define zero $0 /* always zero */
48 #define AT $at /* assembler temp */
49 #define v0 $2 /* return value */
50 #define v1 $3
51 #define a0 $4 /* argument registers */
52 #define a1 $5
53 #define a2 $6
54 #define a3 $7
55 #if defined(__mips_n32) || defined(__mips_n64)
56 #define a4 $8 /* expanded register arguments */
57 #define a5 $9
58 #define a6 $10
59 #define a7 $11
60 #define ta0 $8 /* alias */
61 #define ta1 $9
62 #define ta2 $10
63 #define ta3 $11
64 #define t0 $12 /* temp registers (not saved across subroutine calls) */
65 #define t1 $13
66 #define t2 $14
67 #define t3 $15
68 #else
69 #define t0 $8 /* temp registers (not saved across subroutine calls) */
70 #define t1 $9
71 #define t2 $10
72 #define t3 $11
73 #define t4 $12
74 #define t5 $13
75 #define t6 $14
76 #define t7 $15
77 #define ta0 $12 /* alias */
78 #define ta1 $13
79 #define ta2 $14
80 #define ta3 $15
81 #endif
82 #define s0 $16 /* saved across subroutine calls (callee saved) */
83 #define s1 $17
84 #define s2 $18
85 #define s3 $19
86 #define s4 $20
87 #define s5 $21
88 #define s6 $22
89 #define s7 $23
90 #define t8 $24 /* two more temp registers */
91 #define t9 $25
92 #define k0 $26 /* kernel temporary */
93 #define k1 $27
94 #define gp $28 /* global pointer */
95 #define sp $29 /* stack pointer */
96 #define s8 $30 /* one more callee saved */
97 #define ra $31 /* return address */
99 #endif /* !_MIPS_REGDEF_H_ */