glibc/sysdeps/mips/sys/regdef.h

/* Copyright (C) 1997-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ralf Baechle <ralf@gnu.org>.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library.  If not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _SYS_REGDEF_H
#define _SYS_REGDEF_H

#include <sgidefs.h>

/*
 * Symbolic register names for 32 bit ABI
 */
#define zero    $0      /* wired zero */
#define AT      $1      /* assembler temp  - uppercase because of ".set at" */
#define v0      $2      /* return value */
#define v1      $3
#define a0      $4      /* argument registers */
#define a1      $5
#define a2      $6
#define a3      $7
#if _MIPS_SIM != _ABIO32
#define a4      $8
#define a5      $9
#define a6      $10
#define a7      $11
#define t0      $12
#define t1      $13
#define t2      $14
#define t3      $15
#define ta0     a4
#define ta1     a5
#define ta2     a6
#define ta3     a7
#else /* if _MIPS_SIM == _ABIO32 */
#define t0      $8      /* caller saved */
#define t1      $9
#define t2      $10
#define t3      $11
#define t4      $12
#define t5      $13
#define t6      $14
#define t7      $15
#define ta0     t4
#define ta1     t5
#define ta2     t6
#define ta3     t7
#endif /* _MIPS_SIM == _ABIO32 */
#define s0      $16     /* 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     /* caller saved */
#define t9      $25
#define jp      $25     /* PIC jump register */
#define k0      $26     /* kernel scratch */
#define k1      $27
#define gp      $28     /* global pointer */
#define sp      $29     /* stack pointer */
#define fp      $30     /* frame pointer */
#define s8	$30	/* same like fp! */
#define ra      $31     /* return address */

#endif /* _SYS_REGDEF_H */