| /* |
| * 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 */ |
