1 /* $NetBSD: regdef.h,v 1.4 1994/10/26 21:09:58 cgd 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)regdef.h 8.1 (Berkeley) 6/10/93 40 */ 41 42 #define zero $0 /* always zero */ 43 #define AT $at /* assembler temp */ 44 #define v0 $2 /* return value */ 45 #define v1 $3 46 #define a0 $4 /* argument registers */ 47 #define a1 $5 48 #define a2 $6 49 #define a3 $7 50 #define t0 $8 /* temp registers (not saved across subroutine calls) */ 51 #define t1 $9 52 #define t2 $10 53 #define t3 $11 54 #define t4 $12 55 #define t5 $13 56 #define t6 $14 57 #define t7 $15 58 #define s0 $16 /* saved across subroutine calls (callee saved) */ 59 #define s1 $17 60 #define s2 $18 61 #define s3 $19 62 #define s4 $20 63 #define s5 $21 64 #define s6 $22 65 #define s7 $23 66 #define t8 $24 /* two more temp registers */ 67 #define t9 $25 68 #define k0 $26 /* kernel temporary */ 69 #define k1 $27 70 #define gp $28 /* global pointer */ 71 #define sp $29 /* stack pointer */ 72 #define s8 $30 /* one more callee saved */ 73 #define ra $31 /* return address */ 74