rt-thread/libcpu/mips/common/mips.inc

/*
 * Copyright (c) 2006-2022, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2010-05-17     sangwei      first version
 */

#ifndef __MIPS_INC__
#define __MIPS_INC__

#define zero    $0		/* wired zero */
// #define at      $1
#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		/* caller saved */
#define t1      $9
#define t2      $10
#define t3      $11
#define t4      $12
#define t5      $13
#define t6      $14
#define t7      $15
#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 /* end of __MIPS_INC__   */