   /* 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_IPUT_QUICK.S
    * Code: Optimization for iput
    *
    * For: iput-quick
    *
    * Format: B|A|op CCCC (22c)
    *
    * Syntax: op vA, vB, offset@CCCC
    */

    movl        rINST, %eax             # %eax<- BA
    shr         $$4, %eax               # %eax<- B
    and         $$15, rINST             # rINST<- A
    GET_VREG    %eax                    # %eax<- vB; object to operate on
    FETCH       1, %ecx                 # %ecx<- CCCC; field byte offset
    cmp         $$0, %eax               # check if object is null
    je          common_errNullObject    # handle null object
    FFETCH_ADV  2, %edx                 # %edx<- next instruction hi; fetch, advance
    GET_VREG    rINST                   # rINST<- vA
    movl        rINST, (%eax, %ecx)     # object field<- vA
    testl       rINST, rINST            # did we write a null object
    je          1f
    movl        rGLUE, %ecx             # get glue
    movl        offGlue_cardTable(%ecx), %ecx # get card table base
    shrl        $$GC_CARD_SHIFT, %eax   # get gc card index
    movb        %cl, (%eax, %ecx)       # mark gc card in table
1:
    FGETOP_JMP  2, %edx                 # jump to next instruction; getop, jmp