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_ARRAY_LENGTH.S 18 * 19 * Code: 32-bit array length operation. 20 * 21 * For: array-length 22 * 23 * Description: Store the length of the indicated array in the given 24 * destination register. vB <- offArrayObject_length(vA) 25 * 26 * Format: B|A|op (12x) 27 * 28 * Syntax: op vA, vB 29 */ 30 31 movl rINST, %eax # %eax<- BA 32 shr $$4, %eax # %eax<- B 33 andl $$15, rINST # rINST<- A 34 FFETCH_ADV 1, %edx # %edx<- next instruction hi; fetch, advance 35 GET_VREG %eax # %eax<- vB 36 testl %eax, %eax # check for null array object 37 je common_errNullObject # handle null array object 38 movl offArrayObject_length(%eax), %eax # %eax<- array length 39 movl %eax, (rFP, rINST, 4) # vA<- %eax; array length 40 FGETOP_JMP 1, %edx # jump to next instruction; getop, jmp 41
