4736ccfd9c
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111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/* $NetBSD: regdef.h,v 1.12 2005/12/11 12:18:09 christos Exp $ */
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/*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell. This file is derived from the MIPS RISC
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* Architecture book by Gerry Kane.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)regdef.h 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#ifndef _MIPS_REGDEF_H
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#define _MIPS_REGDEF_H
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#include <machine/cdefs.h> /* for API selection */
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#define zero $0 /* always zero */
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#define AT $at /* assembler temporary */
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#define v0 $2 /* return value */
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#define v1 $3
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#define a0 $4 /* argument registers */
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#define a1 $5
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#define a2 $6
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#define a3 $7
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#if defined(__mips_n32) || defined(__mips_n64)
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#define a4 $8
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#define a5 $9
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#define a6 $10
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#define a7 $11
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#define t0 $12 /* temp registers (not saved across subroutine calls) */
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#define t1 $13
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#define t2 $14
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#define t3 $15
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#else
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#define t0 $8 /* temp registers (not saved across subroutine calls) */
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#define t1 $9
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#define t2 $10
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#define t3 $11
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#define t4 $12
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#define t5 $13
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#define t6 $14
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#define t7 $15
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#endif /* __mips_n32 || __mips_n64 */
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#define s0 $16 /* saved across subroutine calls (callee saved) */
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#define s1 $17
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#define s2 $18
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#define s3 $19
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#define s4 $20
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#define s5 $21
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#define s6 $22
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#define s7 $23
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#define t8 $24 /* two more temporary registers */
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#define t9 $25
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#define k0 $26 /* kernel temporary */
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#define k1 $27
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#define gp $28 /* global pointer */
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#define sp $29 /* stack pointer */
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#define s8 $30 /* one more callee saved */
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#define ra $31 /* return address */
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/*
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* These are temp registers whose names can be used in either the old
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* or new ABI, although they map to different physical registers. In
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* the old ABI, they map to t4-t7, and in the new ABI, they map to a4-a7.
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*
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* Because they overlap with the last 4 arg regs in the new ABI, ta0-ta3
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* should be used only when we need more than t0-t3.
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*/
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#if defined(__mips_n32) || defined(__mips_n64)
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#define ta0 $8
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#define ta1 $9
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#define ta2 $10
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#define ta3 $11
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#else
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#define ta0 $12
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#define ta1 $13
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#define ta2 $14
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#define ta3 $15
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#endif /* __mips_n32 || __mips_n64 */
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#endif /* _MIPS_REGDEF_H */
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