1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "asm_support_x86.S" 18 19 /* 20 * Macro that sets up the callee save frame to conform with 21 * Runtime::CreateCalleeSaveMethod(kSaveAll) 22 */ 23MACRO0(SETUP_SAVE_ALL_CALLEE_SAVE_FRAME) 24 PUSH edi // Save callee saves (ebx is saved/restored by the upcall) 25 PUSH esi 26 PUSH ebp 27 subl MACRO_LITERAL(16), %esp // Grow stack by 4 words, bottom word will hold Method* 28 .cfi_adjust_cfa_offset 16 29END_MACRO 30 31 /* 32 * Macro that sets up the callee save frame to conform with 33 * Runtime::CreateCalleeSaveMethod(kRefsOnly) 34 */ 35MACRO0(SETUP_REF_ONLY_CALLEE_SAVE_FRAME) 36 PUSH edi // Save callee saves (ebx is saved/restored by the upcall) 37 PUSH esi 38 PUSH ebp 39 subl MACRO_LITERAL(16), %esp // Grow stack by 4 words, bottom word will hold Method* 40 .cfi_adjust_cfa_offset 16 41END_MACRO 42 43MACRO0(RESTORE_REF_ONLY_CALLEE_SAVE_FRAME) 44 addl MACRO_LITERAL(28), %esp // Unwind stack up to return address 45 .cfi_adjust_cfa_offset -28 46END_MACRO 47 48 /* 49 * Macro that sets up the callee save frame to conform with 50 * Runtime::CreateCalleeSaveMethod(kRefsAndArgs) 51 */ 52MACRO0(SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME) 53 PUSH edi // Save callee saves 54 PUSH esi 55 PUSH ebp 56 PUSH ebx // Save args 57 PUSH edx 58 PUSH ecx 59 PUSH eax // Align stack, eax will be clobbered by Method* 60END_MACRO 61 62MACRO0(RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME) 63 addl MACRO_LITERAL(4), %esp // Remove padding 64 .cfi_adjust_cfa_offset -4 65 POP ecx // Restore args except eax 66 POP edx 67 POP ebx 68 POP ebp // Restore callee saves 69 POP esi 70 POP edi 71END_MACRO 72 73 /* 74 * Macro that set calls through to artDeliverPendingExceptionFromCode, where the pending 75 * exception is Thread::Current()->exception_. 76 */ 77MACRO0(DELIVER_PENDING_EXCEPTION) 78 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save callee saves for throw 79 mov %esp, %ecx 80 // Outgoing argument set up 81 subl MACRO_LITERAL(8), %esp // Alignment padding 82 .cfi_adjust_cfa_offset 8 83 PUSH ecx // pass SP 84 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 85 .cfi_adjust_cfa_offset 4 86 call SYMBOL(artDeliverPendingExceptionFromCode) // artDeliverPendingExceptionFromCode(Thread*, SP) 87 int3 // unreached 88END_MACRO 89 90MACRO2(NO_ARG_RUNTIME_EXCEPTION, c_name, cxx_name) 91 DEFINE_FUNCTION VAR(c_name, 0) 92 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context 93 mov %esp, %ecx 94 // Outgoing argument set up 95 subl MACRO_LITERAL(8), %esp // alignment padding 96 .cfi_adjust_cfa_offset 8 97 PUSH ecx // pass SP 98 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 99 .cfi_adjust_cfa_offset 4 100 call VAR(cxx_name, 1) // cxx_name(Thread*, SP) 101 int3 // unreached 102 END_FUNCTION VAR(c_name, 0) 103END_MACRO 104 105MACRO2(ONE_ARG_RUNTIME_EXCEPTION, c_name, cxx_name) 106 DEFINE_FUNCTION VAR(c_name, 0) 107 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context 108 mov %esp, %ecx 109 // Outgoing argument set up 110 PUSH eax // alignment padding 111 PUSH ecx // pass SP 112 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 113 .cfi_adjust_cfa_offset 4 114 PUSH eax // pass arg1 115 call VAR(cxx_name, 1) // cxx_name(arg1, Thread*, SP) 116 int3 // unreached 117 END_FUNCTION VAR(c_name, 0) 118END_MACRO 119 120MACRO2(TWO_ARG_RUNTIME_EXCEPTION, c_name, cxx_name) 121 DEFINE_FUNCTION VAR(c_name, 0) 122 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context 123 mov %esp, %edx 124 // Outgoing argument set up 125 PUSH edx // pass SP 126 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 127 .cfi_adjust_cfa_offset 4 128 PUSH ecx // pass arg2 129 PUSH eax // pass arg1 130 call VAR(cxx_name, 1) // cxx_name(arg1, arg2, Thread*, SP) 131 int3 // unreached 132 END_FUNCTION VAR(c_name, 0) 133END_MACRO 134 135 /* 136 * Called by managed code to create and deliver a NullPointerException. 137 */ 138NO_ARG_RUNTIME_EXCEPTION art_quick_throw_null_pointer_exception, artThrowNullPointerExceptionFromCode 139 140 /* 141 * Called by managed code to create and deliver an ArithmeticException. 142 */ 143NO_ARG_RUNTIME_EXCEPTION art_quick_throw_div_zero, artThrowDivZeroFromCode 144 145 /* 146 * Called by managed code to create and deliver a StackOverflowError. 147 */ 148NO_ARG_RUNTIME_EXCEPTION art_quick_throw_stack_overflow, artThrowStackOverflowFromCode 149 150 /* 151 * Called by managed code, saves callee saves and then calls artThrowException 152 * that will place a mock Method* at the bottom of the stack. Arg1 holds the exception. 153 */ 154ONE_ARG_RUNTIME_EXCEPTION art_quick_deliver_exception, artDeliverExceptionFromCode 155 156 /* 157 * Called by managed code to create and deliver a NoSuchMethodError. 158 */ 159ONE_ARG_RUNTIME_EXCEPTION art_quick_throw_no_such_method, artThrowNoSuchMethodFromCode 160 161 /* 162 * Called by managed code to create and deliver an ArrayIndexOutOfBoundsException. Arg1 holds 163 * index, arg2 holds limit. 164 */ 165TWO_ARG_RUNTIME_EXCEPTION art_quick_throw_array_bounds, artThrowArrayBoundsFromCode 166 167 /* 168 * All generated callsites for interface invokes and invocation slow paths will load arguments 169 * as usual - except instead of loading arg0/r0 with the target Method*, arg0/r0 will contain 170 * the method_idx. This wrapper will save arg1-arg3, load the caller's Method*, align the 171 * stack and call the appropriate C helper. 172 * NOTE: "this" is first visible argument of the target, and so can be found in arg1/r1. 173 * 174 * The helper will attempt to locate the target and return a 64-bit result in r0/r1 consisting 175 * of the target Method* in r0 and method->code_ in r1. 176 * 177 * If unsuccessful, the helper will return NULL/NULL. There will bea pending exception in the 178 * thread and we branch to another stub to deliver it. 179 * 180 * On success this wrapper will restore arguments and *jump* to the target, leaving the lr 181 * pointing back to the original caller. 182 */ 183MACRO2(INVOKE_TRAMPOLINE, c_name, cxx_name) 184 DEFINE_FUNCTION VAR(c_name, 0) 185 // Set up the callee save frame to conform with Runtime::CreateCalleeSaveMethod(kRefsAndArgs) 186 // return address 187 PUSH edi 188 PUSH esi 189 PUSH ebp 190 PUSH ebx 191 PUSH edx 192 PUSH ecx 193 PUSH eax // <-- callee save Method* to go here 194 movl %esp, %edx // remember SP 195 // Outgoing argument set up 196 subl MACRO_LITERAL(12), %esp // alignment padding 197 .cfi_adjust_cfa_offset 12 198 PUSH edx // pass SP 199 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 200 .cfi_adjust_cfa_offset 4 201 pushl 32(%edx) // pass caller Method* 202 .cfi_adjust_cfa_offset 4 203 PUSH ecx // pass arg2 204 PUSH eax // pass arg1 205 call VAR(cxx_name, 1) // cxx_name(arg1, arg2, arg3, Thread*, SP) 206 movl %edx, %edi // save code pointer in EDI 207 addl MACRO_LITERAL(36), %esp // Pop arguments skip eax 208 .cfi_adjust_cfa_offset -36 209 POP ecx // Restore args 210 POP edx 211 POP ebx 212 POP ebp // Restore callee saves. 213 POP esi 214 // Swap EDI callee save with code pointer. 215 xchgl %edi, (%esp) 216 testl %eax, %eax // Branch forward if exception pending. 217 jz 1f 218 // Tail call to intended method. 219 ret 2201: 221 addl MACRO_LITERAL(4), %esp // Pop code pointer off stack 222 .cfi_adjust_cfa_offset -4 223 DELIVER_PENDING_EXCEPTION 224 END_FUNCTION VAR(c_name, 0) 225END_MACRO 226 227INVOKE_TRAMPOLINE art_quick_invoke_interface_trampoline, artInvokeInterfaceTrampoline 228INVOKE_TRAMPOLINE art_quick_invoke_interface_trampoline_with_access_check, artInvokeInterfaceTrampolineWithAccessCheck 229 230INVOKE_TRAMPOLINE art_quick_invoke_static_trampoline_with_access_check, artInvokeStaticTrampolineWithAccessCheck 231INVOKE_TRAMPOLINE art_quick_invoke_direct_trampoline_with_access_check, artInvokeDirectTrampolineWithAccessCheck 232INVOKE_TRAMPOLINE art_quick_invoke_super_trampoline_with_access_check, artInvokeSuperTrampolineWithAccessCheck 233INVOKE_TRAMPOLINE art_quick_invoke_virtual_trampoline_with_access_check, artInvokeVirtualTrampolineWithAccessCheck 234 235 /* 236 * Quick invocation stub. 237 * On entry: 238 * [sp] = return address 239 * [sp + 4] = method pointer 240 * [sp + 8] = argument array or NULL for no argument methods 241 * [sp + 12] = size of argument array in bytes 242 * [sp + 16] = (managed) thread pointer 243 * [sp + 20] = JValue* result 244 * [sp + 24] = result type char 245 */ 246DEFINE_FUNCTION art_quick_invoke_stub 247 PUSH ebp // save ebp 248 PUSH ebx // save ebx 249 mov %esp, %ebp // copy value of stack pointer into base pointer 250 .cfi_def_cfa_register ebp 251 mov 20(%ebp), %ebx // get arg array size 252 addl LITERAL(28), %ebx // reserve space for return addr, method*, ebx, and ebp in frame 253 andl LITERAL(0xFFFFFFF0), %ebx // align frame size to 16 bytes 254 subl LITERAL(12), %ebx // remove space for return address, ebx, and ebp 255 subl %ebx, %esp // reserve stack space for argument array 256 lea 4(%esp), %eax // use stack pointer + method ptr as dest for memcpy 257 pushl 20(%ebp) // push size of region to memcpy 258 pushl 16(%ebp) // push arg array as source of memcpy 259 pushl %eax // push stack pointer as destination of memcpy 260 call SYMBOL(memcpy) // (void*, const void*, size_t) 261 addl LITERAL(12), %esp // pop arguments to memcpy 262 movl LITERAL(0), (%esp) // store NULL for method* 263 mov 12(%ebp), %eax // move method pointer into eax 264 mov 4(%esp), %ecx // copy arg1 into ecx 265 mov 8(%esp), %edx // copy arg2 into edx 266 mov 12(%esp), %ebx // copy arg3 into ebx 267 call *METHOD_CODE_OFFSET(%eax) // call the method 268 mov %ebp, %esp // restore stack pointer 269 POP ebx // pop ebx 270 POP ebp // pop ebp 271 mov 20(%esp), %ecx // get result pointer 272 cmpl LITERAL(68), 24(%esp) // test if result type char == 'D' 273 je return_double_quick 274 cmpl LITERAL(70), 24(%esp) // test if result type char == 'F' 275 je return_float_quick 276 mov %eax, (%ecx) // store the result 277 mov %edx, 4(%ecx) // store the other half of the result 278 ret 279return_double_quick: 280return_float_quick: 281 movsd %xmm0, (%ecx) // store the floating point result 282 ret 283END_FUNCTION art_quick_invoke_stub 284 285MACRO3(NO_ARG_DOWNCALL, c_name, cxx_name, return_macro) 286 DEFINE_FUNCTION VAR(c_name, 0) 287 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 288 mov %esp, %edx // remember SP 289 // Outgoing argument set up 290 subl MACRO_LITERAL(8), %esp // push padding 291 .cfi_adjust_cfa_offset 8 292 PUSH edx // pass SP 293 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 294 .cfi_adjust_cfa_offset 4 295 call VAR(cxx_name, 1) // cxx_name(Thread*, SP) 296 addl MACRO_LITERAL(16), %esp // pop arguments 297 .cfi_adjust_cfa_offset -16 298 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 299 CALL_MACRO(return_macro, 2) // return or deliver exception 300 END_FUNCTION VAR(c_name, 0) 301END_MACRO 302 303MACRO3(ONE_ARG_DOWNCALL, c_name, cxx_name, return_macro) 304 DEFINE_FUNCTION VAR(c_name, 0) 305 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 306 mov %esp, %edx // remember SP 307 // Outgoing argument set up 308 PUSH eax // push padding 309 PUSH edx // pass SP 310 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 311 .cfi_adjust_cfa_offset 4 312 PUSH eax // pass arg1 313 call VAR(cxx_name, 1) // cxx_name(arg1, Thread*, SP) 314 addl MACRO_LITERAL(16), %esp // pop arguments 315 .cfi_adjust_cfa_offset -16 316 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 317 CALL_MACRO(return_macro, 2) // return or deliver exception 318 END_FUNCTION VAR(c_name, 0) 319END_MACRO 320 321MACRO3(TWO_ARG_DOWNCALL, c_name, cxx_name, return_macro) 322 DEFINE_FUNCTION VAR(c_name, 0) 323 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 324 mov %esp, %edx // remember SP 325 // Outgoing argument set up 326 PUSH edx // pass SP 327 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 328 .cfi_adjust_cfa_offset 4 329 PUSH ecx // pass arg2 330 PUSH eax // pass arg1 331 call VAR(cxx_name, 1) // cxx_name(arg1, arg2, Thread*, SP) 332 addl MACRO_LITERAL(16), %esp // pop arguments 333 .cfi_adjust_cfa_offset -16 334 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 335 CALL_MACRO(return_macro, 2) // return or deliver exception 336 END_FUNCTION VAR(c_name, 0) 337END_MACRO 338 339MACRO3(THREE_ARG_DOWNCALL, c_name, cxx_name, return_macro) 340 DEFINE_FUNCTION VAR(c_name, 0) 341 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 342 mov %esp, %ebx // remember SP 343 // Outgoing argument set up 344 subl MACRO_LITERAL(12), %esp // alignment padding 345 .cfi_adjust_cfa_offset 12 346 PUSH ebx // pass SP 347 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 348 .cfi_adjust_cfa_offset 4 349 PUSH edx // pass arg3 350 PUSH ecx // pass arg2 351 PUSH eax // pass arg1 352 call VAR(cxx_name, 1) // cxx_name(arg1, arg2, arg3, Thread*, SP) 353 addl MACRO_LITERAL(32), %esp // pop arguments 354 .cfi_adjust_cfa_offset -32 355 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 356 CALL_MACRO(return_macro, 2) // return or deliver exception 357 END_FUNCTION VAR(c_name, 0) 358END_MACRO 359 360MACRO0(RETURN_IF_EAX_NOT_ZERO) 361 testl %eax, %eax // eax == 0 ? 362 jz 1f // if eax == 0 goto 1 363 ret // return 3641: // deliver exception on current thread 365 DELIVER_PENDING_EXCEPTION 366END_MACRO 367 368MACRO0(RETURN_IF_EAX_ZERO) 369 testl %eax, %eax // eax == 0 ? 370 jnz 1f // if eax != 0 goto 1 371 ret // return 3721: // deliver exception on current thread 373 DELIVER_PENDING_EXCEPTION 374END_MACRO 375 376MACRO0(RETURN_OR_DELIVER_PENDING_EXCEPTION) 377 mov %fs:THREAD_EXCEPTION_OFFSET, %ebx // get exception field 378 testl %ebx, %ebx // ebx == 0 ? 379 jnz 1f // if ebx != 0 goto 1 380 ret // return 3811: // deliver exception on current thread 382 DELIVER_PENDING_EXCEPTION 383END_MACRO 384 385TWO_ARG_DOWNCALL art_quick_alloc_object, artAllocObjectFromCode, RETURN_IF_EAX_NOT_ZERO 386TWO_ARG_DOWNCALL art_quick_alloc_object_with_access_check, artAllocObjectFromCodeWithAccessCheck, RETURN_IF_EAX_NOT_ZERO 387THREE_ARG_DOWNCALL art_quick_alloc_array, artAllocArrayFromCode, RETURN_IF_EAX_NOT_ZERO 388THREE_ARG_DOWNCALL art_quick_alloc_array_with_access_check, artAllocArrayFromCodeWithAccessCheck, RETURN_IF_EAX_NOT_ZERO 389THREE_ARG_DOWNCALL art_quick_check_and_alloc_array, artCheckAndAllocArrayFromCode, RETURN_IF_EAX_NOT_ZERO 390THREE_ARG_DOWNCALL art_quick_check_and_alloc_array_with_access_check, artCheckAndAllocArrayFromCodeWithAccessCheck, RETURN_IF_EAX_NOT_ZERO 391 392TWO_ARG_DOWNCALL art_quick_resolve_string, artResolveStringFromCode, RETURN_IF_EAX_NOT_ZERO 393TWO_ARG_DOWNCALL art_quick_initialize_static_storage, artInitializeStaticStorageFromCode, RETURN_IF_EAX_NOT_ZERO 394TWO_ARG_DOWNCALL art_quick_initialize_type, artInitializeTypeFromCode, RETURN_IF_EAX_NOT_ZERO 395TWO_ARG_DOWNCALL art_quick_initialize_type_and_verify_access, artInitializeTypeAndVerifyAccessFromCode, RETURN_IF_EAX_NOT_ZERO 396 397ONE_ARG_DOWNCALL art_quick_lock_object, artLockObjectFromCode, ret 398ONE_ARG_DOWNCALL art_quick_unlock_object, artUnlockObjectFromCode, RETURN_IF_EAX_ZERO 399 400TWO_ARG_DOWNCALL art_quick_handle_fill_data, artHandleFillArrayDataFromCode, RETURN_IF_EAX_ZERO 401 402DEFINE_FUNCTION art_quick_is_assignable 403 PUSH eax // alignment padding 404 PUSH ecx // pass arg2 405 PUSH eax // pass arg1 406 call SYMBOL(artIsAssignableFromCode) // (Class* a, Class* b, Thread*, SP) 407 addl LITERAL(12), %esp // pop arguments 408 .cfi_adjust_cfa_offset -12 409 ret 410END_FUNCTION art_quick_is_assignable 411 412DEFINE_FUNCTION art_quick_memcpy 413 PUSH edx // pass arg3 414 PUSH ecx // pass arg2 415 PUSH eax // pass arg1 416 call SYMBOL(memcpy) // (void*, const void*, size_t) 417 addl LITERAL(12), %esp // pop arguments 418 .cfi_adjust_cfa_offset -12 419 ret 420END_FUNCTION art_quick_memcpy 421 422TWO_ARG_DOWNCALL art_quick_check_cast, artCheckCastFromCode, RETURN_IF_EAX_ZERO 423TWO_ARG_DOWNCALL art_quick_can_put_array_element, artCanPutArrayElementFromCode, RETURN_IF_EAX_ZERO 424 425NO_ARG_DOWNCALL art_quick_test_suspend, artTestSuspendFromCode, ret 426 427DEFINE_FUNCTION art_quick_fmod 428 subl LITERAL(12), %esp // alignment padding 429 .cfi_adjust_cfa_offset 12 430 PUSH ebx // pass arg4 b.hi 431 PUSH edx // pass arg3 b.lo 432 PUSH ecx // pass arg2 a.hi 433 PUSH eax // pass arg1 a.lo 434 call SYMBOL(fmod) // (jdouble a, jdouble b) 435 fstpl (%esp) // pop return value off fp stack 436 movsd (%esp), %xmm0 // place into %xmm0 437 addl LITERAL(28), %esp // pop arguments 438 .cfi_adjust_cfa_offset -28 439 ret 440END_FUNCTION art_quick_fmod 441 442DEFINE_FUNCTION art_quick_fmodf 443 PUSH eax // alignment padding 444 PUSH ecx // pass arg2 b 445 PUSH eax // pass arg1 a 446 call SYMBOL(fmodf) // (jfloat a, jfloat b) 447 fstps (%esp) // pop return value off fp stack 448 movss (%esp), %xmm0 // place into %xmm0 449 addl LITERAL(12), %esp // pop arguments 450 .cfi_adjust_cfa_offset -12 451 ret 452END_FUNCTION art_quick_fmodf 453 454DEFINE_FUNCTION art_quick_l2d 455 PUSH ecx // push arg2 a.hi 456 PUSH eax // push arg1 a.lo 457 fildll (%esp) // load as integer and push into st0 458 fstpl (%esp) // pop value off fp stack as double 459 movsd (%esp), %xmm0 // place into %xmm0 460 addl LITERAL(8), %esp // pop arguments 461 .cfi_adjust_cfa_offset -8 462 ret 463END_FUNCTION art_quick_l2d 464 465DEFINE_FUNCTION art_quick_l2f 466 PUSH ecx // push arg2 a.hi 467 PUSH eax // push arg1 a.lo 468 fildll (%esp) // load as integer and push into st0 469 fstps (%esp) // pop value off fp stack as a single 470 movss (%esp), %xmm0 // place into %xmm0 471 addl LITERAL(8), %esp // pop argument 472 .cfi_adjust_cfa_offset -8 473 ret 474END_FUNCTION art_quick_l2f 475 476DEFINE_FUNCTION art_quick_d2l 477 PUSH eax // alignment padding 478 PUSH ecx // pass arg2 a.hi 479 PUSH eax // pass arg1 a.lo 480 call SYMBOL(art_d2l) // (jdouble a) 481 addl LITERAL(12), %esp // pop arguments 482 .cfi_adjust_cfa_offset -12 483 ret 484END_FUNCTION art_quick_d2l 485 486DEFINE_FUNCTION art_quick_f2l 487 subl LITERAL(8), %esp // alignment padding 488 .cfi_adjust_cfa_offset 8 489 PUSH eax // pass arg1 a 490 call SYMBOL(art_f2l) // (jfloat a) 491 addl LITERAL(12), %esp // pop arguments 492 .cfi_adjust_cfa_offset -12 493 ret 494END_FUNCTION art_quick_f2l 495 496DEFINE_FUNCTION art_quick_idivmod 497 cmpl LITERAL(0x80000000), %eax 498 je check_arg2 // special case 499args_ok: 500 cdq // edx:eax = sign extend eax 501 idiv %ecx // (edx,eax) = (edx:eax % ecx, edx:eax / ecx) 502 ret 503check_arg2: 504 cmpl LITERAL(-1), %ecx 505 jne args_ok 506 xorl %edx, %edx 507 ret // eax already holds min int 508END_FUNCTION art_quick_idivmod 509 510DEFINE_FUNCTION art_quick_ldiv 511 subl LITERAL(12), %esp // alignment padding 512 .cfi_adjust_cfa_offset 12 513 PUSH ebx // pass arg4 b.hi 514 PUSH edx // pass arg3 b.lo 515 PUSH ecx // pass arg2 a.hi 516 PUSH eax // pass arg1 a.lo 517 call SYMBOL(artLdivFromCode) // (jlong a, jlong b) 518 addl LITERAL(28), %esp // pop arguments 519 .cfi_adjust_cfa_offset -28 520 ret 521END_FUNCTION art_quick_ldiv 522 523DEFINE_FUNCTION art_quick_ldivmod 524 subl LITERAL(12), %esp // alignment padding 525 .cfi_adjust_cfa_offset 12 526 PUSH ebx // pass arg4 b.hi 527 PUSH edx // pass arg3 b.lo 528 PUSH ecx // pass arg2 a.hi 529 PUSH eax // pass arg1 a.lo 530 call SYMBOL(artLdivmodFromCode) // (jlong a, jlong b) 531 addl LITERAL(28), %esp // pop arguments 532 .cfi_adjust_cfa_offset -28 533 ret 534END_FUNCTION art_quick_ldivmod 535 536DEFINE_FUNCTION art_quick_lmul 537 imul %eax, %ebx // ebx = a.lo(eax) * b.hi(ebx) 538 imul %edx, %ecx // ecx = b.lo(edx) * a.hi(ecx) 539 mul %edx // edx:eax = a.lo(eax) * b.lo(edx) 540 add %ebx, %ecx 541 add %ecx, %edx // edx += (a.lo * b.hi) + (b.lo * a.hi) 542 ret 543END_FUNCTION art_quick_lmul 544 545DEFINE_FUNCTION art_quick_lshl 546 // ecx:eax << edx 547 xchg %edx, %ecx 548 shld %cl,%eax,%edx 549 shl %cl,%eax 550 test LITERAL(32), %cl 551 jz 1f 552 mov %eax, %edx 553 xor %eax, %eax 5541: 555 ret 556END_FUNCTION art_quick_lshl 557 558DEFINE_FUNCTION art_quick_lshr 559 // ecx:eax >> edx 560 xchg %edx, %ecx 561 shrd %cl,%edx,%eax 562 sar %cl,%edx 563 test LITERAL(32),%cl 564 jz 1f 565 mov %edx, %eax 566 sar LITERAL(31), %edx 5671: 568 ret 569END_FUNCTION art_quick_lshr 570 571DEFINE_FUNCTION art_quick_lushr 572 // ecx:eax >>> edx 573 xchg %edx, %ecx 574 shrd %cl,%edx,%eax 575 shr %cl,%edx 576 test LITERAL(32),%cl 577 jz 1f 578 mov %edx, %eax 579 xor %edx, %edx 5801: 581 ret 582END_FUNCTION art_quick_lushr 583 584DEFINE_FUNCTION art_quick_set32_instance 585 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 586 mov %esp, %ebx // remember SP 587 subl LITERAL(8), %esp // alignment padding 588 .cfi_adjust_cfa_offset 8 589 PUSH ebx // pass SP 590 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 591 .cfi_adjust_cfa_offset 4 592 mov 32(%ebx), %ebx // get referrer 593 PUSH ebx // pass referrer 594 PUSH edx // pass new_val 595 PUSH ecx // pass object 596 PUSH eax // pass field_idx 597 call SYMBOL(artSet32InstanceFromCode) // (field_idx, Object*, new_val, referrer, Thread*, SP) 598 addl LITERAL(32), %esp // pop arguments 599 .cfi_adjust_cfa_offset -32 600 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 601 RETURN_IF_EAX_ZERO // return or deliver exception 602END_FUNCTION art_quick_set32_instance 603 604DEFINE_FUNCTION art_quick_set64_instance 605 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 606 subl LITERAL(8), %esp // alignment padding 607 .cfi_adjust_cfa_offset 8 608 PUSH esp // pass SP-8 609 addl LITERAL(8), (%esp) // fix SP on stack by adding 8 610 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 611 .cfi_adjust_cfa_offset 4 612 PUSH ebx // pass high half of new_val 613 PUSH edx // pass low half of new_val 614 PUSH ecx // pass object 615 PUSH eax // pass field_idx 616 call SYMBOL(artSet64InstanceFromCode) // (field_idx, Object*, new_val, Thread*, SP) 617 addl LITERAL(32), %esp // pop arguments 618 .cfi_adjust_cfa_offset -32 619 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 620 RETURN_IF_EAX_ZERO // return or deliver exception 621END_FUNCTION art_quick_set64_instance 622 623DEFINE_FUNCTION art_quick_set_obj_instance 624 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 625 mov %esp, %ebx // remember SP 626 subl LITERAL(8), %esp // alignment padding 627 .cfi_adjust_cfa_offset 8 628 PUSH ebx // pass SP 629 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 630 .cfi_adjust_cfa_offset 4 631 mov 32(%ebx), %ebx // get referrer 632 PUSH ebx // pass referrer 633 PUSH edx // pass new_val 634 PUSH ecx // pass object 635 PUSH eax // pass field_idx 636 call SYMBOL(artSetObjInstanceFromCode) // (field_idx, Object*, new_val, referrer, Thread*, SP) 637 addl LITERAL(32), %esp // pop arguments 638 .cfi_adjust_cfa_offset -32 639 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 640 RETURN_IF_EAX_ZERO // return or deliver exception 641END_FUNCTION art_quick_set_obj_instance 642 643DEFINE_FUNCTION art_quick_get32_instance 644 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 645 mov %esp, %ebx // remember SP 646 mov 32(%esp), %edx // get referrer 647 subl LITERAL(12), %esp // alignment padding 648 .cfi_adjust_cfa_offset 12 649 PUSH ebx // pass SP 650 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 651 .cfi_adjust_cfa_offset 4 652 PUSH edx // pass referrer 653 PUSH ecx // pass object 654 PUSH eax // pass field_idx 655 call SYMBOL(artGet32InstanceFromCode) // (field_idx, Object*, referrer, Thread*, SP) 656 addl LITERAL(32), %esp // pop arguments 657 .cfi_adjust_cfa_offset -32 658 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 659 RETURN_OR_DELIVER_PENDING_EXCEPTION // return or deliver exception 660END_FUNCTION art_quick_get32_instance 661 662DEFINE_FUNCTION art_quick_get64_instance 663 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 664 mov %esp, %ebx // remember SP 665 mov 32(%esp), %edx // get referrer 666 subl LITERAL(12), %esp // alignment padding 667 .cfi_adjust_cfa_offset 12 668 PUSH ebx // pass SP 669 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 670 .cfi_adjust_cfa_offset 4 671 PUSH edx // pass referrer 672 PUSH ecx // pass object 673 PUSH eax // pass field_idx 674 call SYMBOL(artGet64InstanceFromCode) // (field_idx, Object*, referrer, Thread*, SP) 675 addl LITERAL(32), %esp // pop arguments 676 .cfi_adjust_cfa_offset -32 677 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 678 RETURN_OR_DELIVER_PENDING_EXCEPTION // return or deliver exception 679END_FUNCTION art_quick_get64_instance 680 681DEFINE_FUNCTION art_quick_get_obj_instance 682 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 683 mov %esp, %ebx // remember SP 684 mov 32(%esp), %edx // get referrer 685 subl LITERAL(12), %esp // alignment padding 686 .cfi_adjust_cfa_offset 12 687 PUSH ebx // pass SP 688 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 689 .cfi_adjust_cfa_offset 4 690 PUSH edx // pass referrer 691 PUSH ecx // pass object 692 PUSH eax // pass field_idx 693 call SYMBOL(artGetObjInstanceFromCode) // (field_idx, Object*, referrer, Thread*, SP) 694 addl LITERAL(32), %esp // pop arguments 695 .cfi_adjust_cfa_offset -32 696 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 697 RETURN_OR_DELIVER_PENDING_EXCEPTION // return or deliver exception 698END_FUNCTION art_quick_get_obj_instance 699 700DEFINE_FUNCTION art_quick_set32_static 701 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 702 mov %esp, %ebx // remember SP 703 mov 32(%esp), %edx // get referrer 704 subl LITERAL(12), %esp // alignment padding 705 .cfi_adjust_cfa_offset 12 706 PUSH ebx // pass SP 707 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 708 .cfi_adjust_cfa_offset 4 709 PUSH edx // pass referrer 710 PUSH ecx // pass new_val 711 PUSH eax // pass field_idx 712 call SYMBOL(artSet32StaticFromCode) // (field_idx, new_val, referrer, Thread*, SP) 713 addl LITERAL(32), %esp // pop arguments 714 .cfi_adjust_cfa_offset -32 715 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 716 RETURN_IF_EAX_ZERO // return or deliver exception 717END_FUNCTION art_quick_set32_static 718 719DEFINE_FUNCTION art_quick_set64_static 720 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 721 mov %esp, %ebx // remember SP 722 subl LITERAL(8), %esp // alignment padding 723 .cfi_adjust_cfa_offset 8 724 PUSH ebx // pass SP 725 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 726 .cfi_adjust_cfa_offset 4 727 mov 32(%ebx), %ebx // get referrer 728 PUSH edx // pass high half of new_val 729 PUSH ecx // pass low half of new_val 730 PUSH ebx // pass referrer 731 PUSH eax // pass field_idx 732 call SYMBOL(artSet64StaticFromCode) // (field_idx, referrer, new_val, Thread*, SP) 733 addl LITERAL(32), %esp // pop arguments 734 .cfi_adjust_cfa_offset -32 735 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 736 RETURN_IF_EAX_ZERO // return or deliver exception 737END_FUNCTION art_quick_set64_static 738 739DEFINE_FUNCTION art_quick_set_obj_static 740 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 741 mov %esp, %ebx // remember SP 742 mov 32(%esp), %edx // get referrer 743 subl LITERAL(12), %esp // alignment padding 744 .cfi_adjust_cfa_offset 12 745 PUSH ebx // pass SP 746 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 747 .cfi_adjust_cfa_offset 4 748 PUSH edx // pass referrer 749 PUSH ecx // pass new_val 750 PUSH eax // pass field_idx 751 call SYMBOL(artSetObjStaticFromCode) // (field_idx, new_val, referrer, Thread*, SP) 752 addl LITERAL(32), %esp // pop arguments 753 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 754 RETURN_IF_EAX_ZERO // return or deliver exception 755END_FUNCTION art_quick_set_obj_static 756 757DEFINE_FUNCTION art_quick_get32_static 758 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 759 mov %esp, %edx // remember SP 760 mov 32(%esp), %ecx // get referrer 761 PUSH edx // pass SP 762 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 763 .cfi_adjust_cfa_offset 4 764 PUSH ecx // pass referrer 765 PUSH eax // pass field_idx 766 call SYMBOL(artGet32StaticFromCode) // (field_idx, referrer, Thread*, SP) 767 addl LITERAL(16), %esp // pop arguments 768 .cfi_adjust_cfa_offset -16 769 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 770 RETURN_OR_DELIVER_PENDING_EXCEPTION // return or deliver exception 771END_FUNCTION art_quick_get32_static 772 773DEFINE_FUNCTION art_quick_get64_static 774 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 775 mov %esp, %edx // remember SP 776 mov 32(%esp), %ecx // get referrer 777 PUSH edx // pass SP 778 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 779 .cfi_adjust_cfa_offset 4 780 PUSH ecx // pass referrer 781 PUSH eax // pass field_idx 782 call SYMBOL(artGet64StaticFromCode) // (field_idx, referrer, Thread*, SP) 783 addl LITERAL(16), %esp // pop arguments 784 .cfi_adjust_cfa_offset -16 785 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 786 RETURN_OR_DELIVER_PENDING_EXCEPTION // return or deliver exception 787END_FUNCTION art_quick_get64_static 788 789DEFINE_FUNCTION art_quick_get_obj_static 790 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save ref containing registers for GC 791 mov %esp, %edx // remember SP 792 mov 32(%esp), %ecx // get referrer 793 PUSH edx // pass SP 794 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 795 .cfi_adjust_cfa_offset 4 796 PUSH ecx // pass referrer 797 PUSH eax // pass field_idx 798 call SYMBOL(artGetObjStaticFromCode) // (field_idx, referrer, Thread*, SP) 799 addl LITERAL(16), %esp // pop arguments 800 .cfi_adjust_cfa_offset -16 801 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME // restore frame up to return address 802 RETURN_OR_DELIVER_PENDING_EXCEPTION // return or deliver exception 803END_FUNCTION art_quick_get_obj_static 804 805DEFINE_FUNCTION art_quick_proxy_invoke_handler 806 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME // save frame and Method* 807 PUSH esp // pass SP 808 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 809 .cfi_adjust_cfa_offset 4 810 PUSH ecx // pass receiver 811 PUSH eax // pass proxy method 812 call SYMBOL(artQuickProxyInvokeHandler) // (proxy method, receiver, Thread*, SP) 813 movd %eax, %xmm0 // place return value also into floating point return value 814 movd %edx, %xmm1 815 punpckldq %xmm1, %xmm0 816 addl LITERAL(44), %esp // pop arguments 817 .cfi_adjust_cfa_offset -44 818 RETURN_OR_DELIVER_PENDING_EXCEPTION // return or deliver exception 819END_FUNCTION art_quick_proxy_invoke_handler 820 821DEFINE_FUNCTION art_quick_resolution_trampoline 822 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME 823 PUSH esp // pass SP 824 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 825 .cfi_adjust_cfa_offset 4 826 PUSH ecx // pass receiver 827 PUSH eax // pass method 828 call SYMBOL(artQuickResolutionTrampoline) // (Method* called, receiver, Thread*, SP) 829 movl %eax, %edi // remember code pointer in EDI 830 addl LITERAL(16), %esp // pop arguments 831 test %eax, %eax // if code pointer is NULL goto deliver pending exception 832 jz 1f 833 POP eax // called method 834 POP ecx // restore args 835 POP edx 836 POP ebx 837 POP ebp // restore callee saves except EDI 838 POP esi 839 xchgl 0(%esp),%edi // restore EDI and place code pointer as only value on stack 840 ret // tail call into method 8411: 842 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 843 DELIVER_PENDING_EXCEPTION 844END_FUNCTION art_quick_resolution_trampoline 845 846DEFINE_FUNCTION art_quick_to_interpreter_bridge 847 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME // save frame 848 mov %esp, %edx // remember SP 849 PUSH eax // alignment padding 850 PUSH edx // pass SP 851 pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current() 852 .cfi_adjust_cfa_offset 4 853 PUSH eax // pass method 854 call SYMBOL(artQuickToInterpreterBridge) // (method, Thread*, SP) 855 movd %eax, %xmm0 // place return value also into floating point return value 856 movd %edx, %xmm1 857 punpckldq %xmm1, %xmm0 858 addl LITERAL(44), %esp // pop arguments 859 .cfi_adjust_cfa_offset -44 860 RETURN_OR_DELIVER_PENDING_EXCEPTION // return or deliver exception 861END_FUNCTION art_quick_to_interpreter_bridge 862 863 /* 864 * Routine that intercepts method calls and returns. 865 */ 866DEFINE_FUNCTION art_quick_instrumentation_entry 867 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME 868 movl %esp, %edx // Save SP. 869 PUSH eax // Save eax which will be clobbered by the callee-save method. 870 subl LITERAL(8), %esp // Align stack. 871 .cfi_adjust_cfa_offset 8 872 pushl 40(%esp) // Pass LR. 873 .cfi_adjust_cfa_offset 4 874 PUSH edx // Pass SP. 875 pushl %fs:THREAD_SELF_OFFSET // Pass Thread::Current(). 876 .cfi_adjust_cfa_offset 4 877 PUSH ecx // Pass receiver. 878 PUSH eax // Pass Method*. 879 call SYMBOL(artInstrumentationMethodEntryFromCode) // (Method*, Object*, Thread*, SP, LR) 880 addl LITERAL(28), %esp // Pop arguments upto saved Method*. 881 movl 28(%esp), %edi // Restore edi. 882 movl %eax, 28(%esp) // Place code* over edi, just under return pc. 883 movl LITERAL(SYMBOL(art_quick_instrumentation_exit)), 32(%esp) 884 // Place instrumentation exit as return pc. 885 movl (%esp), %eax // Restore eax. 886 movl 8(%esp), %ecx // Restore ecx. 887 movl 12(%esp), %edx // Restore edx. 888 movl 16(%esp), %ebx // Restore ebx. 889 movl 20(%esp), %ebp // Restore ebp. 890 movl 24(%esp), %esi // Restore esi. 891 addl LITERAL(28), %esp // Wind stack back upto code*. 892 ret // Call method (and pop). 893END_FUNCTION art_quick_instrumentation_entry 894 895DEFINE_FUNCTION art_quick_instrumentation_exit 896 pushl LITERAL(0) // Push a fake return PC as there will be none on the stack. 897 SETUP_REF_ONLY_CALLEE_SAVE_FRAME 898 mov %esp, %ecx // Remember SP 899 subl LITERAL(8), %esp // Save float return value. 900 .cfi_adjust_cfa_offset 8 901 movd %xmm0, (%esp) 902 PUSH edx // Save gpr return value. 903 PUSH eax 904 subl LITERAL(8), %esp // Align stack 905 movd %xmm0, (%esp) 906 subl LITERAL(8), %esp // Pass float return value. 907 .cfi_adjust_cfa_offset 8 908 movd %xmm0, (%esp) 909 PUSH edx // Pass gpr return value. 910 PUSH eax 911 PUSH ecx // Pass SP. 912 pushl %fs:THREAD_SELF_OFFSET // Pass Thread::Current. 913 .cfi_adjust_cfa_offset 4 914 call SYMBOL(artInstrumentationMethodExitFromCode) // (Thread*, SP, gpr_result, fpr_result) 915 mov %eax, %ecx // Move returned link register. 916 addl LITERAL(32), %esp // Pop arguments. 917 .cfi_adjust_cfa_offset -32 918 movl %edx, %ebx // Move returned link register for deopt 919 // (ebx is pretending to be our LR). 920 POP eax // Restore gpr return value. 921 POP edx 922 movd (%esp), %xmm0 // Restore fpr return value. 923 addl LITERAL(8), %esp 924 .cfi_adjust_cfa_offset -8 925 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 926 addl LITERAL(4), %esp // Remove fake return pc. 927 jmp *%ecx // Return. 928END_FUNCTION art_quick_instrumentation_exit 929 930 /* 931 * Instrumentation has requested that we deoptimize into the interpreter. The deoptimization 932 * will long jump to the upcall with a special exception of -1. 933 */ 934DEFINE_FUNCTION art_quick_deoptimize 935 pushl %ebx // Fake that we were called. 936 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME 937 mov %esp, %ecx // Remember SP. 938 subl LITERAL(8), %esp // Align stack. 939 .cfi_adjust_cfa_offset 8 940 PUSH ecx // Pass SP. 941 pushl %fs:THREAD_SELF_OFFSET // Pass Thread::Current(). 942 .cfi_adjust_cfa_offset 4 943 call SYMBOL(artDeoptimize) // artDeoptimize(Thread*, SP) 944 int3 // Unreachable. 945END_FUNCTION art_quick_deoptimize 946 947 /* 948 * String's indexOf. 949 * 950 * On entry: 951 * eax: string object (known non-null) 952 * ecx: char to match (known <= 0xFFFF) 953 * edx: Starting offset in string data 954 */ 955DEFINE_FUNCTION art_quick_indexof 956 PUSH edi // push callee save reg 957 mov STRING_COUNT_OFFSET(%eax), %ebx 958 mov STRING_VALUE_OFFSET(%eax), %edi 959 mov STRING_OFFSET_OFFSET(%eax), %eax 960 testl %edx, %edx // check if start < 0 961 jl clamp_min 962clamp_done: 963 cmpl %ebx, %edx // check if start >= count 964 jge not_found 965 lea STRING_DATA_OFFSET(%edi, %eax, 2), %edi // build a pointer to the start of string data 966 mov %edi, %eax // save a copy in eax to later compute result 967 lea (%edi, %edx, 2), %edi // build pointer to start of data to compare 968 subl %edx, %ebx // compute iteration count 969 /* 970 * At this point we have: 971 * eax: original start of string data 972 * ecx: char to compare 973 * ebx: length to compare 974 * edi: start of data to test 975 */ 976 mov %eax, %edx 977 mov %ecx, %eax // put char to match in %eax 978 mov %ebx, %ecx // put length to compare in %ecx 979 repne scasw // find %ax, starting at [%edi], up to length %ecx 980 jne not_found 981 subl %edx, %edi 982 sar LITERAL(1), %edi 983 decl %edi // index = ((curr_ptr - orig_ptr) / 2) - 1 984 mov %edi, %eax 985 POP edi // pop callee save reg 986 ret 987 .balign 16 988not_found: 989 mov LITERAL(-1), %eax // return -1 (not found) 990 POP edi // pop callee save reg 991 ret 992clamp_min: 993 xor %edx, %edx // clamp start to 0 994 jmp clamp_done 995END_FUNCTION art_quick_indexof 996 997 /* 998 * String's compareTo. 999 * 1000 * On entry: 1001 * eax: this string object (known non-null) 1002 * ecx: comp string object (known non-null) 1003 */ 1004DEFINE_FUNCTION art_quick_string_compareto 1005 PUSH esi // push callee save reg 1006 PUSH edi // push callee save reg 1007 mov STRING_COUNT_OFFSET(%eax), %edx 1008 mov STRING_COUNT_OFFSET(%ecx), %ebx 1009 mov STRING_VALUE_OFFSET(%eax), %esi 1010 mov STRING_VALUE_OFFSET(%ecx), %edi 1011 mov STRING_OFFSET_OFFSET(%eax), %eax 1012 mov STRING_OFFSET_OFFSET(%ecx), %ecx 1013 /* Build pointers to the start of string data */ 1014 lea STRING_DATA_OFFSET(%esi, %eax, 2), %esi 1015 lea STRING_DATA_OFFSET(%edi, %ecx, 2), %edi 1016 /* Calculate min length and count diff */ 1017 mov %edx, %ecx 1018 mov %edx, %eax 1019 subl %ebx, %eax 1020 cmovg %ebx, %ecx 1021 /* 1022 * At this point we have: 1023 * eax: value to return if first part of strings are equal 1024 * ecx: minimum among the lengths of the two strings 1025 * esi: pointer to this string data 1026 * edi: pointer to comp string data 1027 */ 1028 repe cmpsw // find nonmatching chars in [%esi] and [%edi], up to length %ecx 1029 jne not_equal 1030 POP edi // pop callee save reg 1031 POP esi // pop callee save reg 1032 ret 1033 .balign 16 1034not_equal: 1035 movzwl -2(%esi), %eax // get last compared char from this string 1036 movzwl -2(%edi), %ecx // get last compared char from comp string 1037 subl %ecx, %eax // return the difference 1038 POP edi // pop callee save reg 1039 POP esi // pop callee save reg 1040 ret 1041END_FUNCTION art_quick_string_compareto 1042 1043 // TODO: implement these! 1044UNIMPLEMENTED art_quick_memcmp16 1045