| Douglas Leung | 200f040 | 2016-02-25 20:05:47 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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 | * Interpreter entry point. |
| 18 | */ |
| 19 | |
| 20 | .text |
| 21 | .align 2 |
| 22 | .global ExecuteMterpImpl |
| 23 | .ent ExecuteMterpImpl |
| 24 | .frame sp, STACK_SIZE, ra |
| 25 | /* |
| 26 | * On entry: |
| 27 | * a0 Thread* self |
| 28 | * a1 code_item |
| 29 | * a2 ShadowFrame |
| 30 | * a3 JValue* result_register |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | ExecuteMterpImpl: |
| 35 | .set noreorder |
| 36 | .cpload t9 |
| 37 | .set reorder |
| 38 | /* Save to the stack. Frame size = STACK_SIZE */ |
| 39 | STACK_STORE_FULL() |
| 40 | /* This directive will make sure all subsequent jal restore gp at a known offset */ |
| 41 | .cprestore STACK_OFFSET_GP |
| 42 | |
| 43 | /* Remember the return register */ |
| 44 | sw a3, SHADOWFRAME_RESULT_REGISTER_OFFSET(a2) |
| 45 | |
| 46 | /* Remember the code_item */ |
| 47 | sw a1, SHADOWFRAME_CODE_ITEM_OFFSET(a2) |
| 48 | |
| 49 | /* set up "named" registers */ |
| 50 | move rSELF, a0 |
| 51 | lw a0, SHADOWFRAME_NUMBER_OF_VREGS_OFFSET(a2) |
| buzbee | ace690f | 2016-03-11 09:51:11 -0800 | [diff] [blame] | 52 | addu rFP, a2, SHADOWFRAME_VREGS_OFFSET # point to vregs. |
| Douglas Leung | 200f040 | 2016-02-25 20:05:47 -0800 | [diff] [blame] | 53 | EAS2(rREFS, rFP, a0) # point to reference array in shadow frame |
| 54 | lw a0, SHADOWFRAME_DEX_PC_OFFSET(a2) # Get starting dex_pc |
| 55 | addu rPC, a1, CODEITEM_INSNS_OFFSET # Point to base of insns[] |
| 56 | EAS1(rPC, rPC, a0) # Create direct pointer to 1st dex opcode |
| 57 | |
| 58 | EXPORT_PC() |
| 59 | |
| 60 | /* Starting ibase */ |
| 61 | lw rIBASE, THREAD_CURRENT_IBASE_OFFSET(rSELF) |
| 62 | |
| Douglas Leung | 020b18a | 2016-06-03 18:05:35 -0700 | [diff] [blame] | 63 | /* Set up for backwards branches & osr profiling */ |
| 64 | lw a0, OFF_FP_METHOD(rFP) |
| 65 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 66 | JAL(MterpSetUpHotnessCountdown) # (method, shadow_frame) |
| 67 | move rPROFILE, v0 # Starting hotness countdown to rPROFILE |
| 68 | |
| Douglas Leung | 200f040 | 2016-02-25 20:05:47 -0800 | [diff] [blame] | 69 | /* start executing the instruction at rPC */ |
| 70 | FETCH_INST() # load rINST from rPC |
| 71 | GET_INST_OPCODE(t0) # extract opcode from rINST |
| 72 | GOTO_OPCODE(t0) # jump to next instruction |
| 73 | /* NOTE: no fallthrough */ |