xref: /src/sys/arch/pmax/include/regdef.h

/*	$NetBSD: regdef.h,v 1.4 1994/10/26 21:09:58 cgd Exp $	*/

/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ralph Campbell. This file is derived from the MIPS RISC
 * Architecture book by Gerry Kane.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)regdef.h	8.1 (Berkeley) 6/10/93
 */

#define zero	$0	/* always zero */
#define AT	$at	/* assembler temp */
#define v0	$2	/* return value */
#define v1	$3
#define a0	$4	/* argument registers */
#define a1	$5
#define a2	$6
#define a3	$7
#define t0	$8	/* temp registers (not saved across subroutine calls) */
#define t1	$9
#define t2	$10
#define t3	$11
#define t4	$12
#define t5	$13
#define t6	$14
#define t7	$15
#define s0	$16	/* saved across subroutine calls (callee saved) */
#define s1	$17
#define s2	$18
#define s3	$19
#define s4	$20
#define s5	$21
#define s6	$22
#define s7	$23
#define t8	$24	/* two more temp registers */
#define t9	$25
#define k0	$26	/* kernel temporary */
#define k1	$27
#define gp	$28	/* global pointer */
#define sp	$29	/* stack pointer */
#define s8	$30	/* one more callee saved */
#define ra	$31	/* return address */