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.S 18 * 19 * Code: Generic 32-bit instance field "get" operation. Provides a 20 * "mov" variable which determines the type of mov performed. 21 * Currently, none of the iget's use this variable - may want 22 * to change this, but seems ok for now. 23 * 24 * For: iget-boolean, iget-byte, iget-char, iget-object, iget 25 * iget-short 26 * 27 * Description: Perform the object instance field "get" operation 28 * with the identified field; load the instance value into 29 * the value register. 30 * 31 * 32 * Format: B|A|op CCCC (22c) 33 * 34 * Syntax: op vA, vB, type@CCCC 35 * op vA, vB, field@CCCC 36 */ 37 38 %default { "mov":"l" } 39 40 movl rGLUE, %edx # %edx<- pMterpGlue 41 movl offGlue_methodClassDex(%edx), %edx # %edx<- pDvmDex 42 FETCH 1, %ecx # %ecx<- CCCC 43 movl offDvmDex_pResFields(%edx), %edx # %edx<- pDvmDex->pResFields 44 cmp $$0, (%edx, %ecx, 4) # check for null ptr; resolved InstField ptr 45 movl (%edx, %ecx, 4), %eax # %eax<- resolved InstField ptr 46 jne .L${opcode}_finish2 47 movl rGLUE, %edx # %edx<- pMterpGlue 48 movl offGlue_method(%edx), %edx # %edx <- current method 49 EXPORT_PC # in case an exception is thrown 50 movl offMethod_clazz(%edx), %edx # %edx<- method->clazz 51 movl %ecx, -4(%esp) # push parameter CCCC; field ref 52 movl %edx, -8(%esp) # push parameter method->clazz 53 lea -8(%esp), %esp 54 jmp .L${opcode}_finish 55 %break 56 57 .L${opcode}_finish: 58 call dvmResolveInstField # call: (const ClassObject* referrer, u4 ifieldIdx) 59 # return: InstField* 60 cmp $$0, %eax # check if resolved 61 lea 8(%esp), %esp 62 je common_exceptionThrown # not resolved; handle exception 63 64 /* 65 * %eax holds resolved field 66 */ 67 68 .L${opcode}_finish2: 69 movl rINST, %ecx # %ecx<- BA 70 shr $$4, %ecx # %ecx<- B 71 and $$15, rINST # rINST<- A 72 73 GET_VREG %ecx # %ecx<- vB 74 cmp $$0, %ecx # check for null object 75 je common_errNullObject # handle null object 76 movl offInstField_byteOffset(%eax), %edx # %edx<- field offset 77 FFETCH_ADV 2, %eax # %eax<- next instruction hi; fetch, advance 78 mov$mov (%ecx, %edx), %edx # %edx<- object field 79 SET_VREG %edx, rINST # vA<- %edx; object field 80 FGETOP_JMP 2, %eax # jump to next instruction; getop, jmp 81
