1 /* 2 * Copyright (c) 1992 Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Ralph Campbell. This file is derived from the MIPS RISC 7 * Architecture book by Gerry Kane. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)regdef.h 7.1 (Berkeley) 1/7/92 38 * $Id: regdef.h,v 1.1.1.1 1993/10/12 03:22:41 deraadt Exp $ 39 */ 40 41 #define zero $0 /* always zero */ 42 #define AT $at /* assembler temp */ 43 #define v0 $2 /* return value */ 44 #define v1 $3 45 #define a0 $4 /* argument registers */ 46 #define a1 $5 47 #define a2 $6 48 #define a3 $7 49 #define t0 $8 /* temp registers (not saved across subroutine calls) */ 50 #define t1 $9 51 #define t2 $10 52 #define t3 $11 53 #define t4 $12 54 #define t5 $13 55 #define t6 $14 56 #define t7 $15 57 #define s0 $16 /* saved across subroutine calls (callee saved) */ 58 #define s1 $17 59 #define s2 $18 60 #define s3 $19 61 #define s4 $20 62 #define s5 $21 63 #define s6 $22 64 #define s7 $23 65 #define t8 $24 /* two more temp registers */ 66 #define t9 $25 67 #define k0 $26 /* kernel temporary */ 68 #define k1 $27 69 #define gp $28 /* global pointer */ 70 #define sp $29 /* stack pointer */ 71 #define s8 $30 /* one more callee saved */ 72 #define ra $31 /* return address */ 73