70 lines
2.5 KiB
ArmAsm
70 lines
2.5 KiB
ArmAsm
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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.text
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/*
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* Interpreter entry point.
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* On entry:
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* x0 Thread* self/
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* x1 code_item
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* x2 ShadowFrame
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* x3 JValue* result_register
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*
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*/
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.global ExecuteMterpImpl
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.type ExecuteMterpImpl, %function
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.balign 16
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ExecuteMterpImpl:
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.cfi_startproc
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SAVE_TWO_REGS_INCREASE_FRAME xPROFILE, x27, 80
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SAVE_TWO_REGS xIBASE, xREFS, 16
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SAVE_TWO_REGS xSELF, xINST, 32
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SAVE_TWO_REGS xPC, xFP, 48
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SAVE_TWO_REGS fp, lr, 64
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add fp, sp, #64
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/* Remember the return register */
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str x3, [x2, #SHADOWFRAME_RESULT_REGISTER_OFFSET]
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/* Remember the code_item */
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str x1, [x2, #SHADOWFRAME_CODE_ITEM_OFFSET]
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/* set up "named" registers */
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mov xSELF, x0
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ldr w0, [x2, #SHADOWFRAME_NUMBER_OF_VREGS_OFFSET]
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add xFP, x2, #SHADOWFRAME_VREGS_OFFSET // point to vregs.
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add xREFS, xFP, w0, lsl #2 // point to reference array in shadow frame
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ldr w0, [x2, #SHADOWFRAME_DEX_PC_OFFSET] // Get starting dex_pc.
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add xPC, x1, #CODEITEM_INSNS_OFFSET // Point to base of insns[]
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add xPC, xPC, w0, lsl #1 // Create direct pointer to 1st dex opcode
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EXPORT_PC
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/* Starting ibase */
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ldr xIBASE, [xSELF, #THREAD_CURRENT_IBASE_OFFSET]
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/* Set up for backwards branches & osr profiling */
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ldr x0, [xFP, #OFF_FP_METHOD]
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add x1, xFP, #OFF_FP_SHADOWFRAME
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bl MterpSetUpHotnessCountdown
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mov wPROFILE, w0 // Starting hotness countdown to xPROFILE
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/* start executing the instruction at rPC */
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FETCH_INST // load wINST from rPC
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GET_INST_OPCODE ip // extract opcode from wINST
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GOTO_OPCODE ip // jump to next instruction
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/* NOTE: no fallthrough */
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