diff options
Diffstat (limited to 'vm/mterp/x86-atom/OP_IGET.S')
| -rw-r--r-- | vm/mterp/x86-atom/OP_IGET.S | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/vm/mterp/x86-atom/OP_IGET.S b/vm/mterp/x86-atom/OP_IGET.S new file mode 100644 index 0000000..e3a72f7 --- /dev/null +++ b/vm/mterp/x86-atom/OP_IGET.S @@ -0,0 +1,80 @@ + /* 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 + * + * 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. + */ + + /* + * 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 $$0, (%edx, %ecx, 4) # check for null ptr; resolved InstField ptr + movl (%edx, %ecx, 4), %eax # %eax<- resolved InstField ptr + jne .L${opcode}_finish2 + movl rGLUE, %edx # %edx<- pMterpGlue + movl offGlue_method(%edx), %edx # %edx <- current method + EXPORT_PC # in case an exception is thrown + movl offMethod_clazz(%edx), %edx # %edx<- method->clazz + movl %ecx, -4(%esp) # push parameter CCCC; field ref + movl %edx, -8(%esp) # push parameter method->clazz + lea -8(%esp), %esp + jmp .L${opcode}_finish +%break + +.L${opcode}_finish: + call dvmResolveInstField # call: (const ClassObject* referrer, u4 ifieldIdx) + # return: InstField* + cmp $$0, %eax # check if resolved + lea 8(%esp), %esp + je common_exceptionThrown # not resolved; handle exception + + /* + * %eax holds resolved field + */ + +.L${opcode}_finish2: + 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 |