/* * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "asm_support_arm.S" #include "arch/quick_alloc_entrypoints.S" /* Deliver the given exception */ .extern artDeliverExceptionFromCode /* Deliver an exception pending on a thread */ .extern artDeliverPendingException /* * Macro that sets up the callee save frame to conform with * Runtime::CreateCalleeSaveMethod(kSaveAll) */ .macro SETUP_SAVE_ALL_CALLEE_SAVE_FRAME push {r4-r11, lr} @ 9 words of callee saves .save {r4-r11, lr} .cfi_adjust_cfa_offset 36 .cfi_rel_offset r4, 0 .cfi_rel_offset r5, 4 .cfi_rel_offset r6, 8 .cfi_rel_offset r7, 12 .cfi_rel_offset r8, 16 .cfi_rel_offset r9, 20 .cfi_rel_offset r10, 24 .cfi_rel_offset r11, 28 .cfi_rel_offset lr, 32 vpush {s0-s31} .pad #128 .cfi_adjust_cfa_offset 128 sub sp, #12 @ 3 words of space, bottom word will hold Method* .pad #12 .cfi_adjust_cfa_offset 12 // Ugly compile-time check, but we only have the preprocessor. #if (FRAME_SIZE_SAVE_ALL_CALLEE_SAVE != 36 + 128 + 12) #error "SAVE_ALL_CALLEE_SAVE_FRAME(ARM) size not as expected." #endif .endm /* * Macro that sets up the callee save frame to conform with * Runtime::CreateCalleeSaveMethod(kRefsOnly). */ .macro SETUP_REF_ONLY_CALLEE_SAVE_FRAME push {r5-r8, r10-r11, lr} @ 7 words of callee saves .save {r5-r8, r10-r11, lr} .cfi_adjust_cfa_offset 28 .cfi_rel_offset r5, 0 .cfi_rel_offset r6, 4 .cfi_rel_offset r7, 8 .cfi_rel_offset r8, 12 .cfi_rel_offset r10, 16 .cfi_rel_offset r11, 20 .cfi_rel_offset lr, 24 sub sp, #4 @ bottom word will hold Method* .pad #4 .cfi_adjust_cfa_offset 4 // Ugly compile-time check, but we only have the preprocessor. #if (FRAME_SIZE_REFS_ONLY_CALLEE_SAVE != 28 + 4) #error "REFS_ONLY_CALLEE_SAVE_FRAME(ARM) size not as expected." #endif .endm .macro RESTORE_REF_ONLY_CALLEE_SAVE_FRAME add sp, #4 @ bottom word holds Method* pop {r5-r8, r10-r11, lr} @ 7 words of callee saves .cfi_restore r5 .cfi_restore r6 .cfi_restore r7 .cfi_restore r8 .cfi_restore r10 .cfi_restore r11 .cfi_adjust_cfa_offset -32 .endm .macro RESTORE_REF_ONLY_CALLEE_SAVE_FRAME_AND_RETURN add sp, #4 @ bottom word holds Method* pop {r5-r8, r10-r11, lr} @ 7 words of callee saves .cfi_restore r5 .cfi_restore r6 .cfi_restore r7 .cfi_restore r8 .cfi_restore r10 .cfi_restore r11 .cfi_adjust_cfa_offset -32 bx lr @ return .endm /* * Macro that sets up the callee save frame to conform with * Runtime::CreateCalleeSaveMethod(kRefsAndArgs). */ .macro SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME push {r1-r3, r5-r8, r10-r11, lr} @ 10 words of callee saves .save {r1-r3, r5-r8, r10-r11, lr} .cfi_rel_offset r1, 0 .cfi_rel_offset r2, 4 .cfi_rel_offset r3, 8 .cfi_rel_offset r5, 12 .cfi_rel_offset r6, 16 .cfi_rel_offset r7, 20 .cfi_rel_offset r8, 24 .cfi_rel_offset r10, 28 .cfi_rel_offset r11, 32 .cfi_rel_offset lr, 36 .cfi_adjust_cfa_offset 40 sub sp, #8 @ 2 words of space, bottom word will hold Method* .pad #8 .cfi_adjust_cfa_offset 8 // Ugly compile-time check, but we only have the preprocessor. #if (FRAME_SIZE_REFS_AND_ARGS_CALLEE_SAVE != 40 + 8) #error "REFS_AND_ARGS_CALLEE_SAVE_FRAME(ARM64) size not as expected." #endif .endm .macro RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME add sp, #8 @ rewind sp pop {r1-r3, r5-r8, r10-r11, lr} @ 10 words of callee saves .cfi_restore r1 .cfi_restore r2 .cfi_restore r3 .cfi_restore r5 .cfi_restore r6 .cfi_restore r7 .cfi_restore r8 .cfi_restore r10 .cfi_restore r11 .cfi_adjust_cfa_offset -48 .endm .macro RETURN_IF_RESULT_IS_ZERO cbnz r0, 1f @ result non-zero branch over bx lr @ return 1: .endm .macro RETURN_IF_RESULT_IS_NON_ZERO cbz r0, 1f @ result zero branch over bx lr @ return 1: .endm /* * Macro that set calls through to artDeliverPendingExceptionFromCode, where the pending * exception is Thread::Current()->exception_ */ .macro DELIVER_PENDING_EXCEPTION .fnend .fnstart SETUP_SAVE_ALL_CALLEE_SAVE_FRAME @ save callee saves for throw mov r0, r9 @ pass Thread::Current mov r1, sp @ pass SP b artDeliverPendingExceptionFromCode @ artDeliverPendingExceptionFromCode(Thread*, SP) .endm .macro NO_ARG_RUNTIME_EXCEPTION c_name, cxx_name .extern \cxx_name ENTRY \c_name SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context mov r0, r9 @ pass Thread::Current mov r1, sp @ pass SP b \cxx_name @ \cxx_name(Thread*, SP) END \c_name .endm .macro ONE_ARG_RUNTIME_EXCEPTION c_name, cxx_name .extern \cxx_name ENTRY \c_name SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context mov r1, r9 @ pass Thread::Current mov r2, sp @ pass SP b \cxx_name @ \cxx_name(Thread*, SP) bkpt END \c_name .endm .macro TWO_ARG_RUNTIME_EXCEPTION c_name, cxx_name .extern \cxx_name ENTRY \c_name SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP b \cxx_name @ \cxx_name(Thread*, SP) bkpt END \c_name .endm /* * Called by managed code, saves callee saves and then calls artThrowException * that will place a mock Method* at the bottom of the stack. Arg1 holds the exception. */ ONE_ARG_RUNTIME_EXCEPTION art_quick_deliver_exception, artDeliverExceptionFromCode /* * Called by managed code to create and deliver a NullPointerException. */ NO_ARG_RUNTIME_EXCEPTION art_quick_throw_null_pointer_exception, artThrowNullPointerExceptionFromCode /* * Called by managed code to create and deliver an ArithmeticException. */ NO_ARG_RUNTIME_EXCEPTION art_quick_throw_div_zero, artThrowDivZeroFromCode /* * Called by managed code to create and deliver an ArrayIndexOutOfBoundsException. Arg1 holds * index, arg2 holds limit. */ TWO_ARG_RUNTIME_EXCEPTION art_quick_throw_array_bounds, artThrowArrayBoundsFromCode /* * Called by managed code to create and deliver a StackOverflowError. */ NO_ARG_RUNTIME_EXCEPTION art_quick_throw_stack_overflow, artThrowStackOverflowFromCode /* * Called by managed code to create and deliver a NoSuchMethodError. */ ONE_ARG_RUNTIME_EXCEPTION art_quick_throw_no_such_method, artThrowNoSuchMethodFromCode /* * All generated callsites for interface invokes and invocation slow paths will load arguments * as usual - except instead of loading arg0/r0 with the target Method*, arg0/r0 will contain * the method_idx. This wrapper will save arg1-arg3, load the caller's Method*, align the * stack and call the appropriate C helper. * NOTE: "this" is first visible argument of the target, and so can be found in arg1/r1. * * The helper will attempt to locate the target and return a 64-bit result in r0/r1 consisting * of the target Method* in r0 and method->code_ in r1. * * If unsuccessful, the helper will return NULL/NULL. There will bea pending exception in the * thread and we branch to another stub to deliver it. * * On success this wrapper will restore arguments and *jump* to the target, leaving the lr * pointing back to the original caller. */ .macro INVOKE_TRAMPOLINE c_name, cxx_name .extern \cxx_name ENTRY \c_name SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME @ save callee saves in case allocation triggers GC ldr r2, [sp, #48] @ pass caller Method* mov r3, r9 @ pass Thread::Current mov r12, sp str r12, [sp, #-16]! @ expand the frame and pass SP .pad #16 .cfi_adjust_cfa_offset 16 bl \cxx_name @ (method_idx, this, caller, Thread*, SP) add sp, #16 @ strip the extra frame .cfi_adjust_cfa_offset -16 mov r12, r1 @ save Method*->code_ RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME cbz r0, 1f @ did we find the target? if not go to exception delivery bx r12 @ tail call to target 1: DELIVER_PENDING_EXCEPTION END \c_name .endm INVOKE_TRAMPOLINE art_quick_invoke_interface_trampoline, artInvokeInterfaceTrampoline INVOKE_TRAMPOLINE art_quick_invoke_interface_trampoline_with_access_check, artInvokeInterfaceTrampolineWithAccessCheck INVOKE_TRAMPOLINE art_quick_invoke_static_trampoline_with_access_check, artInvokeStaticTrampolineWithAccessCheck INVOKE_TRAMPOLINE art_quick_invoke_direct_trampoline_with_access_check, artInvokeDirectTrampolineWithAccessCheck INVOKE_TRAMPOLINE art_quick_invoke_super_trampoline_with_access_check, artInvokeSuperTrampolineWithAccessCheck INVOKE_TRAMPOLINE art_quick_invoke_virtual_trampoline_with_access_check, artInvokeVirtualTrampolineWithAccessCheck /* * Quick invocation stub. * On entry: * r0 = method pointer * r1 = argument array or NULL for no argument methods * r2 = size of argument array in bytes * r3 = (managed) thread pointer * [sp] = JValue* result * [sp + 4] = shorty */ ENTRY art_quick_invoke_stub push {r0, r4, r5, r9, r11, lr} @ spill regs .save {r0, r4, r5, r9, r11, lr} .pad #24 .cfi_adjust_cfa_offset 24 .cfi_rel_offset r0, 0 .cfi_rel_offset r4, 4 .cfi_rel_offset r5, 8 .cfi_rel_offset r9, 12 .cfi_rel_offset r11, 16 .cfi_rel_offset lr, 20 mov r11, sp @ save the stack pointer .cfi_def_cfa_register r11 mov r9, r3 @ move managed thread pointer into r9 mov r4, #SUSPEND_CHECK_INTERVAL @ reset r4 to suspend check interval add r5, r2, #16 @ create space for method pointer in frame and r5, #0xFFFFFFF0 @ align frame size to 16 bytes sub sp, r5 @ reserve stack space for argument array add r0, sp, #4 @ pass stack pointer + method ptr as dest for memcpy bl memcpy @ memcpy (dest, src, bytes) ldr r0, [r11] @ restore method* ldr r1, [sp, #4] @ copy arg value for r1 ldr r2, [sp, #8] @ copy arg value for r2 ldr r3, [sp, #12] @ copy arg value for r3 mov ip, #0 @ set ip to 0 str ip, [sp] @ store NULL for method* at bottom of frame ldr ip, [r0, #METHOD_QUICK_CODE_OFFSET] @ get pointer to the code blx ip @ call the method mov sp, r11 @ restore the stack pointer ldr ip, [sp, #24] @ load the result pointer strd r0, [ip] @ store r0/r1 into result pointer pop {r0, r4, r5, r9, r11, lr} @ restore spill regs .cfi_restore r0 .cfi_restore r4 .cfi_restore r5 .cfi_restore r9 .cfi_restore lr .cfi_adjust_cfa_offset -24 bx lr END art_quick_invoke_stub /* * On entry r0 is uint32_t* gprs_ and r1 is uint32_t* fprs_ */ ARM_ENTRY art_quick_do_long_jump vldm r1, {s0-s31} @ load all fprs from argument fprs_ ldr r2, [r0, #60] @ r2 = r15 (PC from gprs_ 60=4*15) add r0, r0, #12 @ increment r0 to skip gprs_[0..2] 12=4*3 ldm r0, {r3-r14} @ load remaining gprs from argument gprs_ mov r0, #0 @ clear result registers r0 and r1 mov r1, #0 bx r2 @ do long jump END art_quick_do_long_jump /* * Entry from managed code that calls artHandleFillArrayDataFromCode and delivers exception on * failure. */ .extern artHandleFillArrayDataFromCode ENTRY art_quick_handle_fill_data SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case exception allocation triggers GC mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP bl artHandleFillArrayDataFromCode @ (Array*, const DexFile::Payload*, Thread*, SP) RESTORE_REF_ONLY_CALLEE_SAVE_FRAME RETURN_IF_RESULT_IS_ZERO DELIVER_PENDING_EXCEPTION END art_quick_handle_fill_data /* * Entry from managed code that calls artLockObjectFromCode, may block for GC. r0 holds the * possibly null object to lock. */ .extern artLockObjectFromCode ENTRY art_quick_lock_object cbz r0, .Lslow_lock .Lretry_lock: ldr r2, [r9, #THREAD_ID_OFFSET] ldrex r1, [r0, #LOCK_WORD_OFFSET] cbnz r1, .Lnot_unlocked @ already thin locked @ unlocked case - r2 holds thread id with count of 0 strex r3, r2, [r0, #LOCK_WORD_OFFSET] cbnz r3, .Lstrex_fail @ store failed, retry dmb ish @ full (LoadLoad) memory barrier bx lr .Lstrex_fail: b .Lretry_lock @ unlikely forward branch, need to reload and recheck r1/r2 .Lnot_unlocked: lsr r3, r1, 30 cbnz r3, .Lslow_lock @ if either of the top two bits are set, go slow path eor r2, r1, r2 @ lock_word.ThreadId() ^ self->ThreadId() uxth r2, r2 @ zero top 16 bits cbnz r2, .Lslow_lock @ lock word and self thread id's match -> recursive lock @ else contention, go to slow path add r2, r1, #65536 @ increment count in lock word placing in r2 for storing lsr r1, r2, 30 @ if either of the top two bits are set, we overflowed. cbnz r1, .Lslow_lock @ if we overflow the count go slow path str r2, [r0, #LOCK_WORD_OFFSET] @ no need for strex as we hold the lock bx lr .Lslow_lock: SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case we block mov r1, r9 @ pass Thread::Current mov r2, sp @ pass SP bl artLockObjectFromCode @ (Object* obj, Thread*, SP) RESTORE_REF_ONLY_CALLEE_SAVE_FRAME RETURN_IF_RESULT_IS_ZERO DELIVER_PENDING_EXCEPTION END art_quick_lock_object /* * Entry from managed code that calls artUnlockObjectFromCode and delivers exception on failure. * r0 holds the possibly null object to lock. */ .extern artUnlockObjectFromCode ENTRY art_quick_unlock_object cbz r0, .Lslow_unlock ldr r1, [r0, #LOCK_WORD_OFFSET] lsr r2, r1, 30 cbnz r2, .Lslow_unlock @ if either of the top two bits are set, go slow path ldr r2, [r9, #THREAD_ID_OFFSET] eor r3, r1, r2 @ lock_word.ThreadId() ^ self->ThreadId() uxth r3, r3 @ zero top 16 bits cbnz r3, .Lslow_unlock @ do lock word and self thread id's match? cmp r1, #65536 bpl .Lrecursive_thin_unlock @ transition to unlocked, r3 holds 0 str r3, [r0, #LOCK_WORD_OFFSET] dmb ish @ full (StoreLoad) memory barrier bx lr .Lrecursive_thin_unlock: sub r1, r1, #65536 str r1, [r0, #LOCK_WORD_OFFSET] bx lr .Lslow_unlock: SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case exception allocation triggers GC mov r1, r9 @ pass Thread::Current mov r2, sp @ pass SP bl artUnlockObjectFromCode @ (Object* obj, Thread*, SP) RESTORE_REF_ONLY_CALLEE_SAVE_FRAME RETURN_IF_RESULT_IS_ZERO DELIVER_PENDING_EXCEPTION END art_quick_unlock_object /* * Entry from managed code that calls artIsAssignableFromCode and on failure calls * artThrowClassCastException. */ .extern artThrowClassCastException ENTRY art_quick_check_cast push {r0-r1, lr} @ save arguments, link register and pad .save {r0-r1, lr} .cfi_adjust_cfa_offset 12 .cfi_rel_offset r0, 0 .cfi_rel_offset r1, 4 .cfi_rel_offset lr, 8 sub sp, #4 .pad #4 .cfi_adjust_cfa_offset 4 bl artIsAssignableFromCode cbz r0, .Lthrow_class_cast_exception add sp, #4 .cfi_adjust_cfa_offset -4 pop {r0-r1, pc} .Lthrow_class_cast_exception: add sp, #4 .cfi_adjust_cfa_offset -4 pop {r0-r1, lr} .cfi_restore r0 .cfi_restore r1 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP b artThrowClassCastException @ (Class*, Class*, Thread*, SP) bkpt END art_quick_check_cast /* * Entry from managed code for array put operations of objects where the value being stored * needs to be checked for compatibility. * r0 = array, r1 = index, r2 = value */ ENTRY art_quick_aput_obj_with_null_and_bound_check tst r0, r0 bne art_quick_aput_obj_with_bound_check b art_quick_throw_null_pointer_exception END art_quick_aput_obj_with_null_and_bound_check ENTRY art_quick_aput_obj_with_bound_check ldr r3, [r0, #ARRAY_LENGTH_OFFSET] cmp r3, r1 bhi art_quick_aput_obj mov r0, r1 mov r1, r3 b art_quick_throw_array_bounds END art_quick_aput_obj_with_bound_check ENTRY art_quick_aput_obj cbz r2, .Ldo_aput_null ldr r3, [r0, #CLASS_OFFSET] ldr ip, [r2, #CLASS_OFFSET] ldr r3, [r3, #CLASS_COMPONENT_TYPE_OFFSET] cmp r3, ip @ value's type == array's component type - trivial assignability bne .Lcheck_assignability .Ldo_aput: add r3, r0, #OBJECT_ARRAY_DATA_OFFSET str r2, [r3, r1, lsl #2] ldr r3, [r9, #THREAD_CARD_TABLE_OFFSET] lsr r0, r0, #7 strb r3, [r3, r0] blx lr .Ldo_aput_null: add r3, r0, #OBJECT_ARRAY_DATA_OFFSET str r2, [r3, r1, lsl #2] blx lr .Lcheck_assignability: push {r0-r2, lr} @ save arguments .save {r0-r2, lr} .cfi_adjust_cfa_offset 16 .cfi_rel_offset r0, 0 .cfi_rel_offset r1, 4 .cfi_rel_offset r2, 8 .cfi_rel_offset lr, 12 mov r1, ip mov r0, r3 bl artIsAssignableFromCode cbz r0, .Lthrow_array_store_exception pop {r0-r2, lr} .cfi_restore r0 .cfi_restore r1 .cfi_restore r2 .cfi_restore lr .cfi_adjust_cfa_offset -16 add r3, r0, #OBJECT_ARRAY_DATA_OFFSET str r2, [r3, r1, lsl #2] ldr r3, [r9, #THREAD_CARD_TABLE_OFFSET] lsr r0, r0, #7 strb r3, [r3, r0] blx lr .Lthrow_array_store_exception: pop {r0-r2, lr} .cfi_restore r0 .cfi_restore r1 .cfi_restore r2 .cfi_restore lr .cfi_adjust_cfa_offset -16 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME mov r1, r2 mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP b artThrowArrayStoreException @ (Class*, Class*, Thread*, SP) bkpt @ unreached END art_quick_aput_obj /* * Entry from managed code when uninitialized static storage, this stub will run the class * initializer and deliver the exception on error. On success the static storage base is * returned. */ .extern artInitializeStaticStorageFromCode ENTRY art_quick_initialize_static_storage SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP @ artInitializeStaticStorageFromCode(uint32_t type_idx, Method* referrer, Thread*, SP) bl artInitializeStaticStorageFromCode RESTORE_REF_ONLY_CALLEE_SAVE_FRAME RETURN_IF_RESULT_IS_NON_ZERO DELIVER_PENDING_EXCEPTION END art_quick_initialize_static_storage /* * Entry from managed code when dex cache misses for a type_idx */ .extern artInitializeTypeFromCode ENTRY art_quick_initialize_type SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP @ artInitializeTypeFromCode(uint32_t type_idx, Method* referrer, Thread*, SP) bl artInitializeTypeFromCode RESTORE_REF_ONLY_CALLEE_SAVE_FRAME RETURN_IF_RESULT_IS_NON_ZERO DELIVER_PENDING_EXCEPTION END art_quick_initialize_type /* * Entry from managed code when type_idx needs to be checked for access and dex cache may also * miss. */ .extern artInitializeTypeAndVerifyAccessFromCode ENTRY art_quick_initialize_type_and_verify_access SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP @ artInitializeTypeAndVerifyAccessFromCode(uint32_t type_idx, Method* referrer, Thread*, SP) bl artInitializeTypeAndVerifyAccessFromCode RESTORE_REF_ONLY_CALLEE_SAVE_FRAME RETURN_IF_RESULT_IS_NON_ZERO DELIVER_PENDING_EXCEPTION END art_quick_initialize_type_and_verify_access /* * Called by managed code to resolve a static field and load a 32-bit primitive value. */ .extern artGet32StaticFromCode ENTRY art_quick_get32_static SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC ldr r1, [sp, #32] @ pass referrer mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP bl artGet32StaticFromCode @ (uint32_t field_idx, const Method* referrer, Thread*, SP) ldr r1, [r9, #THREAD_EXCEPTION_OFFSET] @ load Thread::Current()->exception_ RESTORE_REF_ONLY_CALLEE_SAVE_FRAME cbnz r1, 1f @ success if no exception pending bx lr @ return on success 1: DELIVER_PENDING_EXCEPTION END art_quick_get32_static /* * Called by managed code to resolve a static field and load a 64-bit primitive value. */ .extern artGet64StaticFromCode ENTRY art_quick_get64_static SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC ldr r1, [sp, #32] @ pass referrer mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP bl artGet64StaticFromCode @ (uint32_t field_idx, const Method* referrer, Thread*, SP) ldr r2, [r9, #THREAD_EXCEPTION_OFFSET] @ load Thread::Current()->exception_ RESTORE_REF_ONLY_CALLEE_SAVE_FRAME cbnz r2, 1f @ success if no exception pending bx lr @ return on success 1: DELIVER_PENDING_EXCEPTION END art_quick_get64_static /* * Called by managed code to resolve a static field and load an object reference. */ .extern artGetObjStaticFromCode ENTRY art_quick_get_obj_static SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC ldr r1, [sp, #32] @ pass referrer mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP bl artGetObjStaticFromCode @ (uint32_t field_idx, const Method* referrer, Thread*, SP) ldr r1, [r9, #THREAD_EXCEPTION_OFFSET] @ load Thread::Current()->exception_ RESTORE_REF_ONLY_CALLEE_SAVE_FRAME cbnz r1, 1f @ success if no exception pending bx lr @ return on success 1: DELIVER_PENDING_EXCEPTION END art_quick_get_obj_static /* * Called by managed code to resolve an instance field and load a 32-bit primitive value. */ .extern artGet32InstanceFromCode ENTRY art_quick_get32_instance SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC ldr r2, [sp, #32] @ pass referrer mov r3, r9 @ pass Thread::Current mov r12, sp str r12, [sp, #-16]! @ expand the frame and pass SP bl artGet32InstanceFromCode @ (field_idx, Object*, referrer, Thread*, SP) add sp, #16 @ strip the extra frame ldr r1, [r9, #THREAD_EXCEPTION_OFFSET] @ load Thread::Current()->exception_ RESTORE_REF_ONLY_CALLEE_SAVE_FRAME cbnz r1, 1f @ success if no exception pending bx lr @ return on success 1: DELIVER_PENDING_EXCEPTION END art_quick_get32_instance /* * Called by managed code to resolve an instance field and load a 64-bit primitive value. */ .extern artGet64InstanceFromCode ENTRY art_quick_get64_instance SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC ldr r2, [sp, #32] @ pass referrer mov r3, r9 @ pass Thread::Current mov r12, sp str r12, [sp, #-16]! @ expand the frame and pass SP .pad #16 .cfi_adjust_cfa_offset 16 bl artGet64InstanceFromCode @ (field_idx, Object*, referrer, Thread*, SP) add sp, #16 @ strip the extra frame .cfi_adjust_cfa_offset -16 ldr r2, [r9, #THREAD_EXCEPTION_OFFSET] @ load Thread::Current()->exception_ RESTORE_REF_ONLY_CALLEE_SAVE_FRAME cbnz r2, 1f @ success if no exception pending bx lr @ return on success 1: DELIVER_PENDING_EXCEPTION END art_quick_get64_instance /* * Called by managed code to resolve an instance field and load an object reference. */ .extern artGetObjInstanceFromCode ENTRY art_quick_get_obj_instance SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC ldr r2, [sp, #32] @ pass referrer mov r3, r9 @ pass Thread::Current mov r12, sp str r12, [sp, #-16]! @ expand the frame and pass SP .pad #16 .cfi_adjust_cfa_offset 16 bl artGetObjInstanceFromCode @ (field_idx, Object*, referrer, Thread*, SP) add sp, #16 @ strip the extra frame .cfi_adjust_cfa_offset -16 ldr r1, [r9, #THREAD_EXCEPTION_OFFSET] @ load Thread::Current()->exception_ RESTORE_REF_ONLY_CALLEE_SAVE_FRAME cbnz r1, 1f @ success if no exception pending bx lr @ return on success 1: DELIVER_PENDING_EXCEPTION END art_quick_get_obj_instance /* * Called by managed code to resolve a static field and store a 32-bit primitive value. */ .extern artSet32StaticFromCode ENTRY art_quick_set32_static SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC ldr r2, [sp, #32] @ pass referrer mov r3, r9 @ pass Thread::Current mov r12, sp str r12, [sp, #-16]! @ expand the frame and pass SP .pad #16 .cfi_adjust_cfa_offset 16 bl artSet32StaticFromCode @ (field_idx, new_val, referrer, Thread*, SP) add sp, #16 @ strip the extra frame .cfi_adjust_cfa_offset -16 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME RETURN_IF_RESULT_IS_ZERO DELIVER_PENDING_EXCEPTION END art_quick_set32_static /* * Called by managed code to resolve a static field and store a 64-bit primitive value. * On entry r0 holds field index, r1:r2 hold new_val */ .extern artSet64StaticFromCode ENTRY art_quick_set64_static SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC mov r3, r2 @ pass one half of wide argument mov r2, r1 @ pass other half of wide argument ldr r1, [sp, #32] @ pass referrer mov r12, sp @ save SP sub sp, #8 @ grow frame for alignment with stack args .pad #8 .cfi_adjust_cfa_offset 8 push {r9, r12} @ pass Thread::Current and SP .save {r9, r12} .cfi_adjust_cfa_offset 8 .cfi_rel_offset r9, 0 bl artSet64StaticFromCode @ (field_idx, referrer, new_val, Thread*, SP) add sp, #16 @ release out args .cfi_adjust_cfa_offset -16 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME @ TODO: we can clearly save an add here RETURN_IF_RESULT_IS_ZERO DELIVER_PENDING_EXCEPTION END art_quick_set64_static /* * Called by managed code to resolve a static field and store an object reference. */ .extern artSetObjStaticFromCode ENTRY art_quick_set_obj_static SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC ldr r2, [sp, #32] @ pass referrer mov r3, r9 @ pass Thread::Current mov r12, sp str r12, [sp, #-16]! @ expand the frame and pass SP .pad #16 .cfi_adjust_cfa_offset 16 bl artSetObjStaticFromCode @ (field_idx, new_val, referrer, Thread*, SP) add sp, #16 @ strip the extra frame .cfi_adjust_cfa_offset -16 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME RETURN_IF_RESULT_IS_ZERO DELIVER_PENDING_EXCEPTION END art_quick_set_obj_static /* * Called by managed code to resolve an instance field and store a 32-bit primitive value. */ .extern artSet32InstanceFromCode ENTRY art_quick_set32_instance SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC ldr r3, [sp, #32] @ pass referrer mov r12, sp @ save SP sub sp, #8 @ grow frame for alignment with stack args .pad #8 .cfi_adjust_cfa_offset 8 push {r9, r12} @ pass Thread::Current and SP .save {r9, r12} .cfi_adjust_cfa_offset 8 .cfi_rel_offset r9, 0 .cfi_rel_offset r12, 4 bl artSet32InstanceFromCode @ (field_idx, Object*, new_val, referrer, Thread*, SP) add sp, #16 @ release out args .cfi_adjust_cfa_offset -16 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME @ TODO: we can clearly save an add here RETURN_IF_RESULT_IS_ZERO DELIVER_PENDING_EXCEPTION END art_quick_set32_instance /* * Called by managed code to resolve an instance field and store a 64-bit primitive value. */ .extern artSet32InstanceFromCode ENTRY art_quick_set64_instance SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC mov r12, sp @ save SP sub sp, #8 @ grow frame for alignment with stack args .pad #8 .cfi_adjust_cfa_offset 8 push {r9, r12} @ pass Thread::Current and SP .save {r9, r12} .cfi_adjust_cfa_offset 8 .cfi_rel_offset r9, 0 bl artSet64InstanceFromCode @ (field_idx, Object*, new_val, Thread*, SP) add sp, #16 @ release out args .cfi_adjust_cfa_offset -16 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME @ TODO: we can clearly save an add here RETURN_IF_RESULT_IS_ZERO DELIVER_PENDING_EXCEPTION END art_quick_set64_instance /* * Called by managed code to resolve an instance field and store an object reference. */ .extern artSetObjInstanceFromCode ENTRY art_quick_set_obj_instance SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC ldr r3, [sp, #32] @ pass referrer mov r12, sp @ save SP sub sp, #8 @ grow frame for alignment with stack args .pad #8 .cfi_adjust_cfa_offset 8 push {r9, r12} @ pass Thread::Current and SP .save {r9, r12} .cfi_adjust_cfa_offset 8 .cfi_rel_offset r9, 0 bl artSetObjInstanceFromCode @ (field_idx, Object*, new_val, referrer, Thread*, SP) add sp, #16 @ release out args .cfi_adjust_cfa_offset -16 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME @ TODO: we can clearly save an add here RETURN_IF_RESULT_IS_ZERO DELIVER_PENDING_EXCEPTION END art_quick_set_obj_instance /* * Entry from managed code to resolve a string, this stub will allocate a String and deliver an * exception on error. On success the String is returned. R0 holds the referring method, * R1 holds the string index. The fast path check for hit in strings cache has already been * performed. */ .extern artResolveStringFromCode ENTRY art_quick_resolve_string SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP @ artResolveStringFromCode(Method* referrer, uint32_t string_idx, Thread*, SP) bl artResolveStringFromCode RESTORE_REF_ONLY_CALLEE_SAVE_FRAME RETURN_IF_RESULT_IS_NON_ZERO DELIVER_PENDING_EXCEPTION END art_quick_resolve_string // Macro to facilitate adding new allocation entrypoints. .macro TWO_ARG_DOWNCALL name, entrypoint, return .extern \entrypoint ENTRY \name SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP bl \entrypoint @ (uint32_t type_idx, Method* method, Thread*, SP) RESTORE_REF_ONLY_CALLEE_SAVE_FRAME \return DELIVER_PENDING_EXCEPTION END \name .endm // Macro to facilitate adding new array allocation entrypoints. .macro THREE_ARG_DOWNCALL name, entrypoint, return .extern \entrypoint ENTRY \name SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves in case of GC mov r3, r9 @ pass Thread::Current mov r12, sp str r12, [sp, #-16]! @ expand the frame and pass SP .pad #16 .cfi_adjust_cfa_offset 16 @ (uint32_t type_idx, Method* method, int32_t component_count, Thread*, SP) bl \entrypoint add sp, #16 @ strip the extra frame .cfi_adjust_cfa_offset -16 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME \return DELIVER_PENDING_EXCEPTION END \name .endm // Generate the allocation entrypoints for each allocator. GENERATE_ALL_ALLOC_ENTRYPOINTS /* * Called by managed code when the value in rSUSPEND has been decremented to 0. */ .extern artTestSuspendFromCode ENTRY art_quick_test_suspend ldrh r0, [rSELF, #THREAD_FLAGS_OFFSET] mov rSUSPEND, #SUSPEND_CHECK_INTERVAL @ reset rSUSPEND to SUSPEND_CHECK_INTERVAL cbnz r0, 1f @ check Thread::Current()->suspend_count_ == 0 bx lr @ return if suspend_count_ == 0 1: mov r0, rSELF SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves for stack crawl mov r1, sp bl artTestSuspendFromCode @ (Thread*, SP) RESTORE_REF_ONLY_CALLEE_SAVE_FRAME_AND_RETURN END art_quick_test_suspend ENTRY art_quick_implicit_suspend mov r0, rSELF SETUP_REF_ONLY_CALLEE_SAVE_FRAME @ save callee saves for stack crawl mov r1, sp bl artTestSuspendFromCode @ (Thread*, SP) RESTORE_REF_ONLY_CALLEE_SAVE_FRAME_AND_RETURN END art_quick_implicit_suspend /* * Called by managed code that is attempting to call a method on a proxy class. On entry * r0 holds the proxy method and r1 holds the receiver; r2 and r3 may contain arguments. The * frame size of the invoked proxy method agrees with a ref and args callee save frame. */ .extern artQuickProxyInvokeHandler ENTRY art_quick_proxy_invoke_handler SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME str r0, [sp, #0] @ place proxy method at bottom of frame mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP blx artQuickProxyInvokeHandler @ (Method* proxy method, receiver, Thread*, SP) ldr r2, [r9, #THREAD_EXCEPTION_OFFSET] @ load Thread::Current()->exception_ add sp, #16 @ skip r1-r3, 4 bytes padding. .cfi_adjust_cfa_offset -16 cbnz r2, 1f @ success if no exception is pending RESTORE_REF_ONLY_CALLEE_SAVE_FRAME bx lr @ return on success 1: RESTORE_REF_ONLY_CALLEE_SAVE_FRAME DELIVER_PENDING_EXCEPTION END art_quick_proxy_invoke_handler /* * Called to resolve an imt conflict. r12 is a hidden argument that holds the target method's * dex method index. */ ENTRY art_quick_imt_conflict_trampoline ldr r0, [sp, #0] @ load caller Method* ldr r0, [r0, #METHOD_DEX_CACHE_METHODS_OFFSET] @ load dex_cache_resolved_methods add r0, #OBJECT_ARRAY_DATA_OFFSET @ get starting address of data ldr r0, [r0, r12, lsl 2] @ load the target method b art_quick_invoke_interface_trampoline END art_quick_imt_conflict_trampoline .extern artQuickResolutionTrampoline ENTRY art_quick_resolution_trampoline SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME mov r2, r9 @ pass Thread::Current mov r3, sp @ pass SP blx artQuickResolutionTrampoline @ (Method* called, receiver, Thread*, SP) cbz r0, 1f @ is code pointer null? goto exception mov r12, r0 ldr r0, [sp, #0] @ load resolved method in r0 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME bx r12 @ tail-call into actual code 1: RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME DELIVER_PENDING_EXCEPTION END art_quick_resolution_trampoline UNIMPLEMENTED art_quick_generic_jni_trampoline .extern artQuickToInterpreterBridge ENTRY art_quick_to_interpreter_bridge SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME mov r1, r9 @ pass Thread::Current mov r2, sp @ pass SP blx artQuickToInterpreterBridge @ (Method* method, Thread*, SP) ldr r2, [r9, #THREAD_EXCEPTION_OFFSET] @ load Thread::Current()->exception_ add sp, #16 @ skip r1-r3, 4 bytes padding. .cfi_adjust_cfa_offset -16 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME cbnz r2, 1f @ success if no exception is pending bx lr @ return on success 1: DELIVER_PENDING_EXCEPTION END art_quick_to_interpreter_bridge /* * Routine that intercepts method calls and returns. */ .extern artInstrumentationMethodEntryFromCode .extern artInstrumentationMethodExitFromCode ENTRY art_quick_instrumentation_entry SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME str r0, [sp, #4] @ preserve r0 mov r12, sp @ remember sp str lr, [sp, #-16]! @ expand the frame and pass LR .pad #16 .cfi_adjust_cfa_offset 16 .cfi_rel_offset lr, 0 mov r2, r9 @ pass Thread::Current mov r3, r12 @ pass SP blx artInstrumentationMethodEntryFromCode @ (Method*, Object*, Thread*, SP, LR) add sp, #16 @ remove out argument and padding from stack .cfi_adjust_cfa_offset -16 mov r12, r0 @ r12 holds reference to code ldr r0, [sp, #4] @ restore r0 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME blx r12 @ call method with lr set to art_quick_instrumentation_exit END art_quick_instrumentation_entry .type art_quick_instrumentation_exit, #function .global art_quick_instrumentation_exit art_quick_instrumentation_exit: .cfi_startproc .fnstart mov lr, #0 @ link register is to here, so clobber with 0 for later checks SETUP_REF_ONLY_CALLEE_SAVE_FRAME mov r12, sp @ remember bottom of caller's frame push {r0-r1} @ save return value .save {r0-r1} .cfi_adjust_cfa_offset 8 .cfi_rel_offset r0, 0 .cfi_rel_offset r1, 4 sub sp, #8 @ space for return value argument .pad #8 .cfi_adjust_cfa_offset 8 strd r0, [sp] @ r0/r1 -> [sp] for fpr_res mov r2, r0 @ pass return value as gpr_res mov r3, r1 mov r0, r9 @ pass Thread::Current mov r1, r12 @ pass SP blx artInstrumentationMethodExitFromCode @ (Thread*, SP, gpr_res, fpr_res) add sp, #8 .cfi_adjust_cfa_offset -8 mov r2, r0 @ link register saved by instrumentation mov lr, r1 @ r1 is holding link register if we're to bounce to deoptimize pop {r0, r1} @ restore return value .cfi_restore r0 .cfi_restore r1 add sp, #32 @ remove callee save frame .cfi_adjust_cfa_offset -32 bx r2 @ return END art_quick_instrumentation_exit /* * Instrumentation has requested that we deoptimize into the interpreter. The deoptimization * will long jump to the upcall with a special exception of -1. */ .extern artDeoptimize ENTRY art_quick_deoptimize SETUP_SAVE_ALL_CALLEE_SAVE_FRAME mov r0, r9 @ Set up args. mov r1, sp blx artDeoptimize @ artDeoptimize(Thread*, SP) END art_quick_deoptimize /* * Signed 64-bit integer multiply. * * Consider WXxYZ (r1r0 x r3r2) with a long multiply: * WX * x YZ * -------- * ZW ZX * YW YX * * The low word of the result holds ZX, the high word holds * (ZW+YX) + (the high overflow from ZX). YW doesn't matter because * it doesn't fit in the low 64 bits. * * Unlike most ARM math operations, multiply instructions have * restrictions on using the same register more than once (Rd and Rm * cannot be the same). */ /* mul-long vAA, vBB, vCC */ ENTRY art_quick_mul_long push {r9 - r10} .save {r9 - r10} .cfi_adjust_cfa_offset 8 .cfi_rel_offset r9, 0 .cfi_rel_offset r10, 4 mul ip, r2, r1 @ ip<- ZxW umull r9, r10, r2, r0 @ r9/r10 <- ZxX mla r2, r0, r3, ip @ r2<- YxX + (ZxW) add r10, r2, r10 @ r10<- r10 + low(ZxW + (YxX)) mov r0,r9 mov r1,r10 pop {r9 - r10} .cfi_adjust_cfa_offset -8 .cfi_restore r9 .cfi_restore r10 bx lr END art_quick_mul_long /* * Long integer shift. This is different from the generic 32/64-bit * binary operations because vAA/vBB are 64-bit but vCC (the shift * distance) is 32-bit. Also, Dalvik requires us to ignore all but the low * 6 bits. * On entry: * r0: low word * r1: high word * r2: shift count */ /* shl-long vAA, vBB, vCC */ ARM_ENTRY art_quick_shl_long @ ARM code as thumb code requires spills and r2, r2, #63 @ r2<- r2 & 0x3f mov r1, r1, asl r2 @ r1<- r1 << r2 rsb r3, r2, #32 @ r3<- 32 - r2 orr r1, r1, r0, lsr r3 @ r1<- r1 | (r0 << (32-r2)) subs ip, r2, #32 @ ip<- r2 - 32 movpl r1, r0, asl ip @ if r2 >= 32, r1<- r0 << (r2-32) mov r0, r0, asl r2 @ r0<- r0 << r2 bx lr END art_quick_shl_long /* * Long integer shift. This is different from the generic 32/64-bit * binary operations because vAA/vBB are 64-bit but vCC (the shift * distance) is 32-bit. Also, Dalvik requires us to ignore all but the low * 6 bits. * On entry: * r0: low word * r1: high word * r2: shift count */ /* shr-long vAA, vBB, vCC */ ARM_ENTRY art_quick_shr_long @ ARM code as thumb code requires spills and r2, r2, #63 @ r0<- r0 & 0x3f mov r0, r0, lsr r2 @ r0<- r2 >> r2 rsb r3, r2, #32 @ r3<- 32 - r2 orr r0, r0, r1, asl r3 @ r0<- r0 | (r1 << (32-r2)) subs ip, r2, #32 @ ip<- r2 - 32 movpl r0, r1, asr ip @ if r2 >= 32, r0<-r1 >> (r2-32) mov r1, r1, asr r2 @ r1<- r1 >> r2 bx lr END art_quick_shr_long /* * Long integer shift. This is different from the generic 32/64-bit * binary operations because vAA/vBB are 64-bit but vCC (the shift * distance) is 32-bit. Also, Dalvik requires us to ignore all but the low * 6 bits. * On entry: * r0: low word * r1: high word * r2: shift count */ /* ushr-long vAA, vBB, vCC */ ARM_ENTRY art_quick_ushr_long @ ARM code as thumb code requires spills and r2, r2, #63 @ r0<- r0 & 0x3f mov r0, r0, lsr r2 @ r0<- r2 >> r2 rsb r3, r2, #32 @ r3<- 32 - r2 orr r0, r0, r1, asl r3 @ r0<- r0 | (r1 << (32-r2)) subs ip, r2, #32 @ ip<- r2 - 32 movpl r0, r1, lsr ip @ if r2 >= 32, r0<-r1 >>> (r2-32) mov r1, r1, lsr r2 @ r1<- r1 >>> r2 bx lr END art_quick_ushr_long /* * String's indexOf. * * On entry: * r0: string object (known non-null) * r1: char to match (known <= 0xFFFF) * r2: Starting offset in string data */ ENTRY art_quick_indexof push {r4, r10-r11, lr} @ 4 words of callee saves .save {r4, r10-r11, lr} .cfi_adjust_cfa_offset 16 .cfi_rel_offset r4, 0 .cfi_rel_offset r10, 4 .cfi_rel_offset r11, 8 .cfi_rel_offset lr, 12 ldr r3, [r0, #STRING_COUNT_OFFSET] ldr r12, [r0, #STRING_OFFSET_OFFSET] ldr r0, [r0, #STRING_VALUE_OFFSET] /* Clamp start to [0..count] */ cmp r2, #0 it lt movlt r2, #0 cmp r2, r3 it gt movgt r2, r3 /* Build a pointer to the start of string data */ add r0, #STRING_DATA_OFFSET add r0, r0, r12, lsl #1 /* Save a copy in r12 to later compute result */ mov r12, r0 /* Build pointer to start of data to compare and pre-bias */ add r0, r0, r2, lsl #1 sub r0, #2 /* Compute iteration count */ sub r2, r3, r2 /* * At this point we have: * r0: start of data to test * r1: char to compare * r2: iteration count * r12: original start of string data * r3, r4, r10, r11 available for loading string data */ subs r2, #4 blt .Lindexof_remainder .Lindexof_loop4: ldrh r3, [r0, #2]! ldrh r4, [r0, #2]! ldrh r10, [r0, #2]! ldrh r11, [r0, #2]! cmp r3, r1 beq .Lmatch_0 cmp r4, r1 beq .Lmatch_1 cmp r10, r1 beq .Lmatch_2 cmp r11, r1 beq .Lmatch_3 subs r2, #4 bge .Lindexof_loop4 .Lindexof_remainder: adds r2, #4 beq .Lindexof_nomatch .Lindexof_loop1: ldrh r3, [r0, #2]! cmp r3, r1 beq .Lmatch_3 subs r2, #1 bne .Lindexof_loop1 .Lindexof_nomatch: mov r0, #-1 pop {r4, r10-r11, pc} .Lmatch_0: sub r0, #6 sub r0, r12 asr r0, r0, #1 pop {r4, r10-r11, pc} .Lmatch_1: sub r0, #4 sub r0, r12 asr r0, r0, #1 pop {r4, r10-r11, pc} .Lmatch_2: sub r0, #2 sub r0, r12 asr r0, r0, #1 pop {r4, r10-r11, pc} .Lmatch_3: sub r0, r12 asr r0, r0, #1 pop {r4, r10-r11, pc} END art_quick_indexof /* * String's compareTo. * * Requires rARG0/rARG1 to have been previously checked for null. Will * return negative if this's string is < comp, 0 if they are the * same and positive if >. * * On entry: * r0: this object pointer * r1: comp object pointer * */ .extern __memcmp16 ENTRY art_quick_string_compareto mov r2, r0 @ this to r2, opening up r0 for return value sub r0, r2, r1 @ Same? cbnz r0,1f bx lr 1: @ Same strings, return. push {r4, r7-r12, lr} @ 8 words - keep alignment .save {r4, r7-r12, lr} .cfi_adjust_cfa_offset 32 .cfi_rel_offset r4, 0 .cfi_rel_offset r7, 4 .cfi_rel_offset r8, 8 .cfi_rel_offset r9, 12 .cfi_rel_offset r10, 16 .cfi_rel_offset r11, 20 .cfi_rel_offset r12, 24 .cfi_rel_offset lr, 28 ldr r4, [r2, #STRING_OFFSET_OFFSET] ldr r9, [r1, #STRING_OFFSET_OFFSET] ldr r7, [r2, #STRING_COUNT_OFFSET] ldr r10, [r1, #STRING_COUNT_OFFSET] ldr r2, [r2, #STRING_VALUE_OFFSET] ldr r1, [r1, #STRING_VALUE_OFFSET] /* * At this point, we have: * value: r2/r1 * offset: r4/r9 * count: r7/r10 * We're going to compute * r11 <- countDiff * r10 <- minCount */ subs r11, r7, r10 it ls movls r10, r7 /* Now, build pointers to the string data */ add r2, r2, r4, lsl #1 add r1, r1, r9, lsl #1 /* * Note: data pointers point to previous element so we can use pre-index * mode with base writeback. */ add r2, #STRING_DATA_OFFSET-2 @ offset to contents[-1] add r1, #STRING_DATA_OFFSET-2 @ offset to contents[-1] /* * At this point we have: * r2: *this string data * r1: *comp string data * r10: iteration count for comparison * r11: value to return if the first part of the string is equal * r0: reserved for result * r3, r4, r7, r8, r9, r12 available for loading string data */ subs r10, #2 blt .Ldo_remainder2 /* * Unroll the first two checks so we can quickly catch early mismatch * on long strings (but preserve incoming alignment) */ ldrh r3, [r2, #2]! ldrh r4, [r1, #2]! ldrh r7, [r2, #2]! ldrh r8, [r1, #2]! subs r0, r3, r4 it eq subseq r0, r7, r8 bne .Ldone cmp r10, #28 bgt .Ldo_memcmp16 subs r10, #3 blt .Ldo_remainder .Lloopback_triple: ldrh r3, [r2, #2]! ldrh r4, [r1, #2]! ldrh r7, [r2, #2]! ldrh r8, [r1, #2]! ldrh r9, [r2, #2]! ldrh r12,[r1, #2]! subs r0, r3, r4 it eq subseq r0, r7, r8 it eq subseq r0, r9, r12 bne .Ldone subs r10, #3 bge .Lloopback_triple .Ldo_remainder: adds r10, #3 beq .Lreturn_diff .Lloopback_single: ldrh r3, [r2, #2]! ldrh r4, [r1, #2]! subs r0, r3, r4 bne .Ldone subs r10, #1 bne .Lloopback_single .Lreturn_diff: mov r0, r11 pop {r4, r7-r12, pc} .Ldo_remainder2: adds r10, #2 bne .Lloopback_single mov r0, r11 pop {r4, r7-r12, pc} /* Long string case */ .Ldo_memcmp16: mov r7, r11 add r0, r2, #2 add r1, r1, #2 mov r2, r10 bl __memcmp16 cmp r0, #0 it eq moveq r0, r7 .Ldone: pop {r4, r7-r12, pc} END art_quick_string_compareto