| /* 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: zcmp.S |
| * |
| * Code: Generic 32-bit comparison operation. Provides a "revcmp" |
| * variable to specify the reverse comparison to perform |
| * |
| * For: if-eqz, if-gez, if-gtz, if-lez, if-ltz, if-nez |
| * |
| * Description: Branch to the given destination if the given register's |
| * value compares with 0 as specified. |
| * |
| * Format: AA|op BBBB (21t) |
| * |
| * Syntax: op vAA, +BBBB |
| */ |
| |
| cmp $$0, (rFP, rINST, 4) # compare vAA with zero |
| j${revcmp} ${opcode}_2f # goto next instruction or branch |
| FETCHs 1, %edx # %edx<- BBBB; branch offset |
| sal $$1, %edx # %edx<- adjust byte offset |
| |
| /* |
| * Inline common_backwardBranch |
| */ |
| |
| js common_periodicChecks2 # jump on backwards branch |
| 1: |
| FINISH_RB %edx, %ecx # jump to next instruction |
| |
| /* |
| * FINISH code |
| */ |
| |
| ${opcode}_2f: |
| movzbl 4(rPC), %edx # grab the next opcode |
| movzbl 5(rPC), rINST # update the instruction |
| addl $$4, rPC # update the program counter |
| jmp *dvmAsmInstructionJmpTable(, %edx, 4) # jump to next instruction |
