1   /* Copyright (C) 2008 The Android Open Source Project
2    *
3    * Licensed under the Apache License, Version 2.0 (the "License");
4    * you may not use this file except in compliance with the License.
5    * You may obtain a copy of the License at
6    *
7    * http://www.apache.org/licenses/LICENSE-2.0
8    *
9    * Unless required by applicable law or agreed to in writing, software
10    * distributed under the License is distributed on an "AS IS" BASIS,
11    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12    * See the License for the specific language governing permissions and
13    * limitations under the License.
14    */
15
16   /*
17    * File: OP_IGET_QUICK.S
18    *
19    * Code: Optimization for iget
20    *
21    * For: iget-quick
22    *
23    * Format: B|A|op CCCC (22c)
24    *
25    * Syntax: op vA, vB, offset@CCCC
26    */
27
28    movl        rINST, %eax             # %eax<- BA
29    shr         $$4, %eax               # %eax<- B
30    and         $$15, rINST             # rINST<- A
31    GET_VREG    %eax                    # %eax<- vB; object to operate on
32    FETCH       1, %ecx                 # %ecx<- CCCC; field byte offset
33    cmp         $$0, %eax               # check if object is null
34    je          common_errNullObject    # handle null object
35    FFETCH_ADV  2, %edx                 # %eax<- next instruction hi; fetch, advance
36    movl        (%ecx, %eax), %eax      # %eax<- object field
37    SET_VREG    %eax, rINST             # fp[A]<- %eax
38    FGETOP_JMP  2, %edx                 # jump to next instruction; getop, jmp
39