atomic.S revision 1.2
1 /* $NetBSD: atomic.S,v 1.2 2007/11/28 15:24:38 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe, and by Andrew Doran. 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 NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <machine/asm.h> 40 41 #ifdef _KERNEL 42 #define LOCK(n) .Lpatch/**/n: lock 43 #define ALIAS(f, t) STRONG_ALIAS(f,t) 44 #define END(a) _ALIGN_TEXT; LABEL(a) 45 #else 46 #define LOCK(n) lock 47 #define ALIAS(f, t) WEAK_ALIAS(f,t) 48 #define END(a) /* nothing */ 49 #endif 50 51 .text 52 53 /* 32-bit */ 54 55 NENTRY(_atomic_add_32) 56 LOCK(1) 57 addl %esi, (%rdi) 58 ret 59 60 NENTRY(_atomic_add_32_nv) 61 movl %esi, %eax 62 LOCK(2) 63 xaddl %eax, (%rdi) 64 addl %esi, %eax 65 ret 66 67 NENTRY(_atomic_and_32) 68 LOCK(3) 69 andl %esi, (%rdi) 70 ret 71 72 NENTRY(_atomic_and_32_nv) 73 movl (%rdi), %eax 74 1: 75 movl %eax, %ecx 76 andl %esi, %ecx 77 LOCK(4) 78 cmpxchgl %ecx, (%rdi) 79 jnz 1b 80 movl %ecx, %eax 81 ret 82 83 NENTRY(_atomic_dec_32) 84 LOCK(5) 85 decl (%rdi) 86 ret 87 88 NENTRY(_atomic_dec_32_nv) 89 movl $-1, %eax 90 LOCK(6) 91 xaddl %eax, (%rdi) 92 decl %eax 93 ret 94 95 NENTRY(_atomic_inc_32) 96 LOCK(7) 97 incl (%rdi) 98 ret 99 100 NENTRY(_atomic_inc_32_nv) 101 movl $1, %eax 102 LOCK(8) 103 xaddl %eax, (%rdi) 104 incl %eax 105 ret 106 107 NENTRY(_atomic_or_32) 108 LOCK(9) 109 orl %esi, (%rdi) 110 ret 111 112 NENTRY(_atomic_or_32_nv) 113 movl (%rdi), %eax 114 1: 115 movl %eax, %ecx 116 orl %esi, %ecx 117 LOCK(10) 118 cmpxchgl %ecx, (%rdi) 119 jnz 1b 120 movl %ecx, %eax 121 ret 122 123 NENTRY(_atomic_swap_32) 124 LOCK(11) 125 xchgl %esi, (%rdi) 126 ret 127 128 NENTRY(_atomic_cas_32) 129 movl %esi, %eax 130 LOCK(12) 131 cmpxchgl %edx, (%rdi) 132 /* %eax now contains the old value */ 133 ret 134 135 /* 64-bit */ 136 137 NENTRY(_atomic_add_64) 138 LOCK(13) 139 addq %rsi, (%rdi) 140 ret 141 142 NENTRY(_atomic_add_64_nv) 143 movq %rsi, %rax 144 LOCK(14) 145 xaddq %rax, (%rdi) 146 addq %rsi, %rax 147 ret 148 149 NENTRY(_atomic_and_64) 150 LOCK(15) 151 andq %rsi, (%rdi) 152 ret 153 154 NENTRY(_atomic_and_64_nv) 155 movq (%rdi), %rax 156 1: 157 movq %rax, %rcx 158 andq %rsi, %rcx 159 LOCK(16) 160 cmpxchgq %rcx, (%rdi) 161 jnz 1b 162 movq %rcx, %rax 163 ret 164 165 NENTRY(_atomic_dec_64) 166 LOCK(17) 167 decq (%rdi) 168 ret 169 170 NENTRY(_atomic_dec_64_nv) 171 movq $-1, %rax 172 LOCK(18) 173 xaddq %rax, (%rdi) 174 decq %rax 175 ret 176 177 NENTRY(_atomic_inc_64) 178 LOCK(19) 179 incq (%rdi) 180 ret 181 182 NENTRY(_atomic_inc_64_nv) 183 movq $1, %rax 184 LOCK(20) 185 xaddq %rax, (%rdi) 186 incq %rax 187 ret 188 189 NENTRY(_atomic_or_64) 190 LOCK(21) 191 orq %rsi, (%rdi) 192 ret 193 194 NENTRY(_atomic_or_64_nv) 195 movq (%rdi), %rax 196 1: 197 movq %rax, %rcx 198 orq %rsi, %rcx 199 LOCK(22) 200 cmpxchgq %rcx, (%rdi) 201 jnz 1b 202 movq %rcx, %rax 203 ret 204 205 NENTRY(_atomic_swap_64) 206 LOCK(23) 207 xchgq %rsi, (%rdi) 208 ret 209 210 NENTRY(_atomic_cas_64) 211 movq %rsi, %rax 212 LOCK(24) 213 cmpxchgl %edx, (%rdi) 214 /* %eax now contains the old value */ 215 ret 216 217 /* memory barriers */ 218 219 NENTRY(_membar_consumer) 220 LOCK(25) 221 addq $0, -8(%rsp) 222 ret 223 END(membar_consumer_end) 224 225 NENTRY(_membar_producer) 226 /* A store is enough */ 227 movq $0, -8(%rsp) 228 ret 229 END(membar_producer_end) 230 231 NENTRY(_membar_enter) 232 /* A store is enough */ 233 movq $0, -8(%rsp) 234 ret 235 END(membar_enter_end) 236 237 NENTRY(_membar_exit) 238 /* A store is enough */ 239 movq $0, -8(%rsp) 240 ret 241 END(membar_exit_end) 242 243 NENTRY(_membar_sync) 244 LOCK(26) 245 addq $0, -8(%rsp) 246 ret 247 END(membar_sync_end) 248 249 #ifdef _KERNEL 250 NENTRY(sse2_lfence) 251 lfence 252 ret 253 END(sse2_lfence_end) 254 255 NENTRY(sse2_mfence) 256 mfence 257 ret 258 END(sse2_mfence_end) 259 260 atomic_lockpatch: 261 .globl atomic_lockpatch 262 .quad .Lpatch1, .Lpatch2, .Lpatch3, .Lpatch4, .Lpatch5 263 .quad .Lpatch6, .Lpatch7, .Lpatch8, .Lpatch9, .Lpatch10 264 .quad .Lpatch11, .Lpatch12, .Lpatch13, .Lpatch14, .Lpatch15 265 .quad .Lpatch16, .Lpatch17, .Lpatch18, .Lpatch19, .Lpatch20 266 .quad .Lpatch21, .Lpatch22, .Lpatch23, .Lpatch24, .Lpatch25 267 .quad .Lpatch26, 0 268 #endif /* _KERNEL */ 269 270 ALIAS(atomic_add_32,_atomic_add_32) 271 ALIAS(atomic_add_64,_atomic_add_64) 272 ALIAS(atomic_add_uint,_atomic_add_32) 273 ALIAS(atomic_add_ulong,_atomic_add_64) 274 ALIAS(atomic_add_ptr,_atomic_add_64) 275 276 ALIAS(atomic_add_32_nv,_atomic_add_32_nv) 277 ALIAS(atomic_add_64_nv,_atomic_add_64_nv) 278 ALIAS(atomic_add_uint_nv,_atomic_add_32_nv) 279 ALIAS(atomic_add_ulong_nv,_atomic_add_64_nv) 280 ALIAS(atomic_add_ptr_nv,_atomic_add_64_nv) 281 282 ALIAS(atomic_and_32,_atomic_and_32) 283 ALIAS(atomic_and_64,_atomic_and_64) 284 ALIAS(atomic_and_uint,_atomic_and_32) 285 ALIAS(atomic_and_ulong,_atomic_and_64) 286 ALIAS(atomic_and_ptr,_atomic_and_64) 287 288 ALIAS(atomic_and_32_nv,_atomic_and_32_nv) 289 ALIAS(atomic_and_64_nv,_atomic_and_64_nv) 290 ALIAS(atomic_and_uint_nv,_atomic_and_32_nv) 291 ALIAS(atomic_and_ulong_nv,_atomic_and_64_nv) 292 ALIAS(atomic_and_ptr_nv,_atomic_and_64_nv) 293 294 ALIAS(atomic_dec_32,_atomic_dec_32) 295 ALIAS(atomic_dec_64,_atomic_dec_64) 296 ALIAS(atomic_dec_uint,_atomic_dec_32) 297 ALIAS(atomic_dec_ulong,_atomic_dec_64) 298 ALIAS(atomic_dec_ptr,_atomic_dec_64) 299 300 ALIAS(atomic_dec_32_nv,_atomic_dec_32_nv) 301 ALIAS(atomic_dec_64_nv,_atomic_dec_64_nv) 302 ALIAS(atomic_dec_uint_nv,_atomic_dec_32_nv) 303 ALIAS(atomic_dec_ulong_nv,_atomic_dec_64_nv) 304 ALIAS(atomic_dec_ptr_nv,_atomic_dec_64_nv) 305 306 ALIAS(atomic_inc_32,_atomic_inc_32) 307 ALIAS(atomic_inc_64,_atomic_inc_64) 308 ALIAS(atomic_inc_uint,_atomic_inc_32) 309 ALIAS(atomic_inc_ulong,_atomic_inc_64) 310 ALIAS(atomic_inc_ptr,_atomic_inc_64) 311 312 ALIAS(atomic_inc_32_nv,_atomic_inc_32_nv) 313 ALIAS(atomic_inc_64_nv,_atomic_inc_64_nv) 314 ALIAS(atomic_inc_uint_nv,_atomic_inc_32_nv) 315 ALIAS(atomic_inc_ulong_nv,_atomic_inc_64_nv) 316 ALIAS(atomic_inc_ptr_nv,_atomic_inc_64_nv) 317 318 ALIAS(atomic_or_32,_atomic_or_32) 319 ALIAS(atomic_or_uint,_atomic_or_32) 320 ALIAS(atomic_or_ulong,_atomic_or_64) 321 ALIAS(atomic_or_ptr,_atomic_or_64) 322 323 ALIAS(atomic_or_32_nv,_atomic_or_32_nv) 324 ALIAS(atomic_or_64_nv,_atomic_or_64_nv) 325 ALIAS(atomic_or_uint_nv,_atomic_or_32_nv) 326 ALIAS(atomic_or_ulong_nv,_atomic_or_64_nv) 327 ALIAS(atomic_or_ptr_nv,_atomic_or_64_nv) 328 329 ALIAS(atomic_swap_32,_atomic_swap_32) 330 ALIAS(atomic_swap_64,_atomic_swap_64) 331 ALIAS(atomic_swap_uint,_atomic_swap_32) 332 ALIAS(atomic_swap_ulong,_atomic_swap_64) 333 ALIAS(atomic_swap_ptr,_atomic_swap_64) 334 335 ALIAS(atomic_cas_32,_atomic_cas_32) 336 ALIAS(atomic_cas_64,_atomic_cas_64) 337 ALIAS(atomic_cas_uint,_atomic_cas_32) 338 ALIAS(atomic_cas_ulong,_atomic_cas_64) 339 ALIAS(atomic_cas_ptr,_atomic_cas_64) 340 341 ALIAS(membar_consumer,_membar_consumer) 342 ALIAS(membar_producer,_membar_producer) 343 ALIAS(membar_enter,_membar_enter) 344 ALIAS(membar_exit,_membar_exit) 345 ALIAS(membar_sync,_membar_sync) 346
Indexes created Tue Sep 30 11:09:46 GMT 2025