1 /* $OpenBSD: regdef.h,v 1.3 2005/08/07 07:29:44 miod Exp $ */ 2 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_ 39 40 #define zero $0 /* always zero */ 41 #define AT $at /* assembler temp */ 42 #define v0 $2 /* return value */ 43 #define v1 $3 44 #define a0 $4 /* argument registers */ 45 #define a1 $5 46 #define a2 $6 47 #define a3 $7 48 #if defined(__mips_n32) || defined(__mips_n64) 49 #define a4 $8 /* expanded register arguments */ 50 #define a5 $9 51 #define a6 $10 52 #define a7 $11 53 #define ta0 $8 /* alias */ 54 #define ta1 $9 55 #define ta2 $10 56 #define ta3 $11 57 #define t0 $12 /* temp registers (not saved across subroutine calls) */ 58 #define t1 $13 59 #define t2 $14 60 #define t3 $15 61 #else 62 #define t0 $8 /* temp registers (not saved across subroutine calls) */ 63 #define t1 $9 64 #define t2 $10 65 #define t3 $11 66 #define t4 $12 67 #define t5 $13 68 #define t6 $14 69 #define t7 $15 70 #define ta0 $12 /* alias */ 71 #define ta1 $13 72 #define ta2 $14 73 #define ta3 $15 74 #endif 75 #define s0 $16 /* saved across subroutine calls (callee saved) */ 76 #define s1 $17 77 #define s2 $18 78 #define s3 $19 79 #define s4 $20 80 #define s5 $21 81 #define s6 $22 82 #define s7 $23 83 #define t8 $24 /* two more temp registers */ 84 #define t9 $25 85 #define k0 $26 /* kernel temporary */ 86 #define k1 $27 87 #define gp $28 /* global pointer */ 88 #define sp $29 /* stack pointer */ 89 #define s8 $30 /* one more callee saved */ 90 #define ra $31 /* return address */ 91 92 #endif /* !_MIPS_REGDEF_H_ */ 93