1 /* Copyright (C) 1997-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library. If not, see
16 <https://www.gnu.org/licenses/>. */
24 * Symbolic register names for 32 bit ABI
26 #define zero $0 /* wired zero */
27 #define AT $1 /* assembler temp - uppercase because of ".set at" */
28 #define v0 $2 /* return value */
30 #define a0 $4 /* argument registers */
34 #if _MIPS_SIM != _ABIO32
47 #else /* if _MIPS_SIM == _ABIO32 */
48 #define t0 $8 /* caller saved */
60 #endif /* _MIPS_SIM == _ABIO32 */
61 #define s0 $16 /* callee saved */
69 #define t8 $24 /* caller saved */
71 #define jp $25 /* PIC jump register */
72 #define k0 $26 /* kernel scratch */
74 #define gp $28 /* global pointer */
75 #define sp $29 /* stack pointer */
76 #define fp $30 /* frame pointer */
77 #define s8 $30 /* same like fp! */
78 #define ra $31 /* return address */
80 #endif /* _SYS_REGDEF_H */