asm.h revision 1.13.10.3
1 /* $NetBSD: asm.h,v 1.13.10.3 1998/12/06 21:02:49 drochner Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)machAsmDefs.h 8.1 (Berkeley) 6/10/93 39 */ 40 41 /* 42 * machAsmDefs.h -- 43 * 44 * Macros used when writing assembler programs. 45 * 46 * Copyright (C) 1989 Digital Equipment Corporation. 47 * Permission to use, copy, modify, and distribute this software and 48 * its documentation for any purpose and without fee is hereby granted, 49 * provided that the above copyright notice appears in all copies. 50 * Digital Equipment Corporation makes no representations about the 51 * suitability of this software for any purpose. It is provided "as is" 52 * without express or implied warranty. 53 * 54 * from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/machAsmDefs.h, 55 * v 1.2 89/08/15 18:28:24 rab Exp SPRITE (DECWRL) 56 */ 57 58 #ifndef _MIPS_ASM_H 59 #define _MIPS_ASM_H 60 61 /* 62 * Symbolic register names 63 */ 64 #define zero $0 /* always zero */ 65 #define AT $at /* assembler temporary */ 66 #define v0 $2 /* return value */ 67 #define v1 $3 68 #define a0 $4 /* argument registers */ 69 #define a1 $5 70 #define a2 $6 71 #define a3 $7 72 #define t0 $8 /* temp registers (not saved across subroutine calls) */ 73 #define t1 $9 74 #define t2 $10 75 #define t3 $11 76 #define t4 $12 77 #define t5 $13 78 #define t6 $14 79 #define t7 $15 80 #define s0 $16 /* saved across subroutine calls (callee saved) */ 81 #define s1 $17 82 #define s2 $18 83 #define s3 $19 84 #define s4 $20 85 #define s5 $21 86 #define s6 $22 87 #define s7 $23 88 #define t8 $24 /* two more temporary registers */ 89 #define t9 $25 90 #define k0 $26 /* kernel temporary */ 91 #define k1 $27 92 #define gp $28 /* global pointer */ 93 #define sp $29 /* stack pointer */ 94 #define s8 $30 /* one more callee saved */ 95 #define ra $31 /* return address */ 96 97 /* 98 * Define -pg profile entry code. 99 * XXX assume .set noreorder for kernel, .set reorder for user code. 100 */ 101 #define _KERN_MCOUNT \ 102 .set noat; \ 103 move $1,$31; \ 104 jal _mcount; \ 105 subu sp,sp,8; \ 106 .set at 107 108 #ifdef GPROF 109 # if defined(_KERNEL) || defined(_LOCORE) 110 # define MCOUNT _KERN_MCOUNT 111 # else 112 # define MCOUNT .set noreorder; _KERN_MCOUNT ; .set reorder; 113 # endif 114 #else 115 #define MCOUNT 116 #endif 117 118 #ifdef __NO_LEADING_UNDERSCORES__ 119 # define _C_LABEL(x) x 120 #else 121 # ifdef __STDC__ 122 # define _C_LABEL(x) _ ## x 123 # else 124 # define _C_LABEL(x) _/**/x 125 # endif 126 #endif 127 128 #ifdef USE_AENT 129 #define AENT(x) \ 130 .aent x, 0 131 #else 132 #define AENT(x) 133 #endif 134 135 /* 136 * WARN_REFERENCES: create a warning if the specified symbol is referenced 137 * (ELF only, and thus, no leading underscores). 138 */ 139 #ifdef __ELF__ 140 #ifdef __STDC__ 141 #define WARN_REFERENCES(_sym,_msg) \ 142 .section .gnu.warning. ## _sym ; .ascii _msg ; .text 143 #else 144 #define WARN_REFERENCES(_sym,_msg) \ 145 .section .gnu.warning./**/_sym ; .ascii _msg ; .text 146 #endif /* __STDC__ */ 147 #endif /* __ELF__ */ 148 149 /* 150 * LEAF 151 * A leaf routine does 152 * - call no other function, 153 * - never use any register that callee-saved (S0-S8), and 154 * - not use any local stack storage. 155 */ 156 #define LEAF(x) \ 157 .globl _C_LABEL(x); \ 158 .ent _C_LABEL(x), 0; \ 159 _C_LABEL(x): ; \ 160 .frame sp, 0, ra; \ 161 MCOUNT 162 163 /* 164 * LEAF_NOPROFILE 165 * No profilable leaf routine. 166 */ 167 #define LEAF_NOPROFILE(x) \ 168 .globl _C_LABEL(x); \ 169 .ent _C_LABEL(x), 0; \ 170 _C_LABEL(x): ; \ 171 .frame sp, 0, ra 172 173 /* 174 * XLEAF 175 * declare alternate entry to leaf routine 176 */ 177 #define XLEAF(x) \ 178 .globl _C_LABEL(x); \ 179 .aent _C_LABEL(x),0; \ 180 _C_LABEL(x): 181 182 /* 183 * NESTED 184 * A function calls other functions and needs 185 * therefore stack space to save/restore registers. 186 */ 187 #define NESTED(x, fsize, retpc) \ 188 .globl _C_LABEL(x); \ 189 .ent _C_LABEL(x), 0; \ 190 _C_LABEL(x): ; \ 191 .frame sp, fsize, retpc; \ 192 MCOUNT 193 194 /* 195 * NESTED_NOPROFILE(x) 196 * No profilable nested routine. 197 */ 198 #define NESTED_NOPROFILE(x, fsize, retpc) \ 199 .globl _C_LABEL(x); \ 200 .ent _C_LABEL(x), 0; \ 201 _C_LABEL(x): ; \ 202 .frame sp, fsize, retpc 203 204 /* 205 * XNESTED 206 * declare alternate entry point to nested routine. 207 */ 208 #define XNESTED(x) \ 209 .globl _C_LABEL(x); \ 210 .aent _C_LABEL(x),0; \ 211 _C_LABEL(x): 212 213 /* 214 * END 215 * Mark end of a procedure. 216 */ 217 #define END(x) \ 218 .end _C_LABEL(x) 219 220 /* 221 * IMPORT -- import external symbol 222 */ 223 #define IMPORT(sym, size) \ 224 .extern sym,size 225 226 /* 227 * EXPORT -- export definition of symbol 228 */ 229 #define EXPORT(x) \ 230 .globl _C_LABEL(x); \ 231 _C_LABEL(x): 232 233 /* 234 * ALIAS 235 * Global alias for a function, or alternate entry point 236 */ 237 #define ALIAS(x) \ 238 .globl _C_LABEL(x); \ 239 _C_LABEL(x): 240 241 /* 242 * Macros to panic and printf from assembly language. 243 */ 244 #define PANIC(msg) \ 245 la a0, 9f; \ 246 jal _C_LABEL(panic); \ 247 MSG(msg) 248 249 #define PRINTF(msg) \ 250 la a0, 9f; \ 251 jal _C_LABEL(printf); \ 252 MSG(msg) 253 254 #define MSG(msg) \ 255 .rdata; \ 256 9: .asciiz msg; \ 257 .text 258 259 #define ASMSTR(str) \ 260 .asciiz str; \ 261 .align 3 262 263 /* 264 * XXX retain dialects XXX 265 */ 266 #define ALEAF(x) \ 267 .globl _C_LABEL(x); \ 268 AENT (_C_LABEL(x)) \ 269 _C_LABEL(x): 270 271 #define NLEAF(x) \ 272 .globl _C_LABEL(x); \ 273 .ent _C_LABEL(x), 0; \ 274 _C_LABEL(x): ; \ 275 .frame sp, 0, ra 276 277 #define NON_LEAF(x, fsize, retpc) \ 278 .globl _C_LABEL(x); \ 279 .ent _C_LABEL(x), 0; \ 280 _C_LABEL(x): ; \ 281 .frame sp, fsize, retpc; \ 282 MCOUNT 283 284 #define NNON_LEAF(x, fsize, retpc) \ 285 .globl _C_LABEL(x); \ 286 .ent _C_LABEL(x), 0; \ 287 _C_LABEL(x): ; \ 288 .frame sp, fsize, retpc 289 290 #endif /* _MIPS_ASM_H */ 291
Indexes created Wed Oct 01 19:09:53 GMT 2025