1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1985 MIPS Computer Systems, Inc. 7 * Copyright (C) 1994, 95, 99, 2003 by Ralf Baechle 8 * Copyright (C) 1990 - 1992, 1999 Silicon Graphics, Inc. 9 */ 10 #ifndef _ASM_REGDEF_H 11 #define _ASM_REGDEF_H 12 13 #include <asm/sgidefs.h> 14 15 #if _MIPS_SIM == _MIPS_SIM_ABI32 16 17 /* 18 * Symbolic register names for 32 bit ABI 19 */ 20 #define zero $0 /* wired zero */ 21 #define AT $1 /* assembler temp - uppercase because of ".set at" */ 22 #define v0 $2 /* return value */ 23 #define v1 $3 24 #define a0 $4 /* argument registers */ 25 #define a1 $5 26 #define a2 $6 27 #define a3 $7 28 #define t0 $8 /* caller saved */ 29 #define t1 $9 30 #define t2 $10 31 #define t3 $11 32 #define t4 $12 33 #define t5 $13 34 #define t6 $14 35 #define t7 $15 36 #define s0 $16 /* callee saved */ 37 #define s1 $17 38 #define s2 $18 39 #define s3 $19 40 #define s4 $20 41 #define s5 $21 42 #define s6 $22 43 #define s7 $23 44 #define t8 $24 /* caller saved */ 45 #define t9 $25 46 #define jp $25 /* PIC jump register */ 47 #define k0 $26 /* kernel scratch */ 48 #define k1 $27 49 #define gp $28 /* global pointer */ 50 #define sp $29 /* stack pointer */ 51 #define fp $30 /* frame pointer */ 52 #define s8 $30 /* same like fp! */ 53 #define ra $31 /* return address */ 54 55 #endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */ 56 57 #if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 58 59 #define zero $0 /* wired zero */ 60 #define AT $at /* assembler temp - uppercase because of ".set at" */ 61 #define v0 $2 /* return value - caller saved */ 62 #define v1 $3 63 #define a0 $4 /* argument registers */ 64 #define a1 $5 65 #define a2 $6 66 #define a3 $7 67 #define a4 $8 /* arg reg 64 bit; caller saved in 32 bit */ 68 #define ta0 $8 69 #define a5 $9 70 #define ta1 $9 71 #define a6 $10 72 #define ta2 $10 73 #define a7 $11 74 #define ta3 $11 75 #define t0 $12 /* caller saved */ 76 #define t1 $13 77 #define t2 $14 78 #define t3 $15 79 #define s0 $16 /* callee saved */ 80 #define s1 $17 81 #define s2 $18 82 #define s3 $19 83 #define s4 $20 84 #define s5 $21 85 #define s6 $22 86 #define s7 $23 87 #define t8 $24 /* caller saved */ 88 #define t9 $25 /* callee address for PIC/temp */ 89 #define jp $25 /* PIC jump register */ 90 #define k0 $26 /* kernel temporary */ 91 #define k1 $27 92 #define gp $28 /* global pointer - caller saved for PIC */ 93 #define sp $29 /* stack pointer */ 94 #define fp $30 /* frame pointer */ 95 #define s8 $30 /* callee saved */ 96 #define ra $31 /* return address */ 97 98 #endif /* _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 */ 99 100 #endif /* _ASM_REGDEF_H */ 101