| /* |
| * 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. |
| */ |
| /* |
| * Interpreter entry point. |
| */ |
| |
| .text |
| .align 2 |
| .global ExecuteMterpImpl |
| .ent ExecuteMterpImpl |
| .frame sp, STACK_SIZE, ra |
| /* |
| * On entry: |
| * a0 Thread* self |
| * a1 dex_instructions |
| * a2 ShadowFrame |
| * a3 JValue* result_register |
| * |
| */ |
| |
| ExecuteMterpImpl: |
| .cfi_startproc |
| .set noreorder |
| .cpload t9 |
| .set reorder |
| /* Save to the stack. Frame size = STACK_SIZE */ |
| STACK_STORE_FULL() |
| /* This directive will make sure all subsequent jal restore gp at a known offset */ |
| .cprestore STACK_OFFSET_GP |
| |
| /* Remember the return register */ |
| sw a3, SHADOWFRAME_RESULT_REGISTER_OFFSET(a2) |
| |
| /* Remember the dex instruction pointer */ |
| sw a1, SHADOWFRAME_DEX_INSTRUCTIONS_OFFSET(a2) |
| |
| /* set up "named" registers */ |
| move rSELF, a0 |
| lw a0, SHADOWFRAME_NUMBER_OF_VREGS_OFFSET(a2) |
| addu rFP, a2, SHADOWFRAME_VREGS_OFFSET # point to vregs. |
| EAS2(rREFS, rFP, a0) # point to reference array in shadow frame |
| lw a0, SHADOWFRAME_DEX_PC_OFFSET(a2) # Get starting dex_pc |
| EAS1(rPC, a1, a0) # Create direct pointer to 1st dex opcode |
| .cfi_register DPC_PSEUDO_REG, rPC |
| |
| EXPORT_PC() |
| |
| /* Starting ibase */ |
| lw rIBASE, THREAD_CURRENT_IBASE_OFFSET(rSELF) |
| |
| /* Set up for backwards branches & osr profiling */ |
| lw a0, OFF_FP_METHOD(rFP) |
| addu a1, rFP, OFF_FP_SHADOWFRAME |
| move a2, rSELF |
| JAL(MterpSetUpHotnessCountdown) # (method, shadow_frame, self) |
| move rPROFILE, v0 # Starting hotness countdown to rPROFILE |
| |
| /* start executing the instruction at rPC */ |
| FETCH_INST() # load rINST from rPC |
| GET_INST_OPCODE(t0) # extract opcode from rINST |
| GOTO_OPCODE(t0) # jump to next instruction |
| /* NOTE: no fallthrough */ |