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/* Copyright (C) 2008 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
* File: OP_IGET.S
* Code: Generic 32-bit instance field "get" operation. Provides a
* "mov" variable which determines the type of mov performed.
* Currently, none of the iget's use this variable - may want
* to change this, but seems ok for now.
* For: iget-boolean, iget-byte, iget-char, iget-object, iget
* iget-short
* Description: Perform the object instance field "get" operation
* with the identified field; load the instance value into
* the value register.
* Format: B|A|op CCCC (22c)
* Syntax: op vA, vB, type@CCCC
* op vA, vB, field@CCCC
%default { "mov":"l" }
movl rGLUE, %edx # %edx<- pMterpGlue
movl offGlue_methodClassDex(%edx), %edx # %edx<- pDvmDex
FETCH 1, %ecx # %ecx<- CCCC
movl offDvmDex_pResFields(%edx), %edx # %edx<- pDvmDex->pResFields
cmp $$0, (%edx, %ecx, 4) # check for null ptr; resolved InstField ptr
movl (%edx, %ecx, 4), %eax # %eax<- resolved InstField ptr
jne .L${opcode}_finish2
movl rGLUE, %edx # %edx<- pMterpGlue
movl offGlue_method(%edx), %edx # %edx <- current method
EXPORT_PC # in case an exception is thrown
movl offMethod_clazz(%edx), %edx # %edx<- method->clazz
movl %ecx, -4(%esp) # push parameter CCCC; field ref
movl %edx, -8(%esp) # push parameter method->clazz
lea -8(%esp), %esp
jmp .L${opcode}_finish
call dvmResolveInstField # call: (const ClassObject* referrer, u4 ifieldIdx)
# return: InstField*
cmp $$0, %eax # check if resolved
lea 8(%esp), %esp
je common_exceptionThrown # not resolved; handle exception
* %eax holds resolved field
movl rINST, %ecx # %ecx<- BA
shr $$4, %ecx # %ecx<- B
and $$15, rINST # rINST<- A
GET_VREG %ecx # %ecx<- vB
cmp $$0, %ecx # check for null object
je common_errNullObject # handle null object
movl offInstField_byteOffset(%eax), %edx # %edx<- field offset
FFETCH_ADV 2, %eax # %eax<- next instruction hi; fetch, advance
mov$mov (%ecx, %edx), %edx # %edx<- object field
SET_VREG %edx, rINST # vA<- %edx; object field
FGETOP_JMP 2, %eax # jump to next instruction; getop, jmp