/* * Copyright (C) 2016 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. */ .text /* * Interpreter entry point. * On entry: * x0 Thread* self/ * x1 code_item * x2 ShadowFrame * x3 JValue* result_register * */ .global ExecuteMterpImpl .type ExecuteMterpImpl, %function .balign 16 ExecuteMterpImpl: .cfi_startproc stp xPROFILE, x27, [sp, #-80]! stp xIBASE, xREFS, [sp, #16] stp xSELF, xINST, [sp, #32] stp xPC, xFP, [sp, #48] stp fp, lr, [sp, #64] add fp, sp, #64 /* Remember the return register */ str x3, [x2, #SHADOWFRAME_RESULT_REGISTER_OFFSET] /* Remember the code_item */ str x1, [x2, #SHADOWFRAME_CODE_ITEM_OFFSET] /* set up "named" registers */ mov xSELF, x0 ldr w0, [x2, #SHADOWFRAME_NUMBER_OF_VREGS_OFFSET] add xFP, x2, #SHADOWFRAME_VREGS_OFFSET // point to vregs. add xREFS, xFP, w0, lsl #2 // point to reference array in shadow frame ldr w0, [x2, #SHADOWFRAME_DEX_PC_OFFSET] // Get starting dex_pc. add xPC, x1, #CODEITEM_INSNS_OFFSET // Point to base of insns[] add xPC, xPC, w0, lsl #1 // Create direct pointer to 1st dex opcode EXPORT_PC /* Starting ibase */ ldr xIBASE, [xSELF, #THREAD_CURRENT_IBASE_OFFSET] /* Set up for backwards branches & osr profiling */ ldr x0, [xFP, #OFF_FP_METHOD] add x1, xFP, #OFF_FP_SHADOWFRAME bl MterpSetUpHotnessCountdown mov wPROFILE, w0 // Starting hotness countdown to xPROFILE /* start executing the instruction at rPC */ FETCH_INST // load wINST from rPC GET_INST_OPCODE ip // extract opcode from wINST GOTO_OPCODE ip // jump to next instruction /* NOTE: no fallthrough */