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/*
* 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 xIBASE, xREFS, [sp, #-64]!
stp xSELF, xINST, [sp, #16]
stp xPC, xFP, [sp, #32]
stp fp, lr, [sp, #48]
add fp, sp, #48
/* 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]
/* 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 */
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