122d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch   /* Copyright (C) 2008 The Android Open Source Project
222d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    *
322d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * Licensed under the Apache License, Version 2.0 (the "License");
422d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * you may not use this file except in compliance with the License.
522d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * You may obtain a copy of the License at
622d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    *
722d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * http://www.apache.org/licenses/LICENSE-2.0
822d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    *
922d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * Unless required by applicable law or agreed to in writing, software
1022d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * distributed under the License is distributed on an "AS IS" BASIS,
1122d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
1222d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * See the License for the specific language governing permissions and
1322d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * limitations under the License.
1422d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    */
1522d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch
1622d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch   /*
1722d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * File: zcmp.S
1822d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    *
1922d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * Code: Generic 32-bit comparison operation. Provides a "revcmp"
2022d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    *       variable to specify the reverse comparison to perform
2122d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    *
2222d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * For: if-eqz, if-gez, if-gtz, if-lez, if-ltz, if-nez
2322d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    *
2422d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * Description: Branch to the given destination if the given register's
2522d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    *              value compares with 0 as specified.
2622d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    *
2722d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * Format: AA|op BBBB (21t)
2822d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    *
2922d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * Syntax: op vAA, +BBBB
3022d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    */
3122d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch
3222d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    cmp         $$0, (rFP, rINST, 4)    # compare vAA with zero
3322d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    j${revcmp}  ${opcode}_2f                    # goto next instruction or branch
3422d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    FETCHs      1, %edx                 # %edx<- BBBB; branch offset
3522d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    sal         $$1, %edx               # %edx<- adjust byte offset
3622d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch
3722d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch   /*
3822d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * Inline common_backwardBranch
3922d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    */
4022d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch
41f8f23d402dc1eef107995b29ad4d91ee5b4e1c34Johnnie Birch    js          common_periodicChecks_backwardBranch  # jump on backwards branch
4222d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch1:
4322d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    FINISH_RB   %edx, %ecx              # jump to next instruction
4422d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch
4522d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch   /*
4622d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    * FINISH code
4722d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    */
4822d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch
4922d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch${opcode}_2f:
5022d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    movzbl      4(rPC), %edx            # grab the next opcode
5122d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    movzbl      5(rPC), rINST           # update the instruction
5222d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    addl        $$4, rPC                # update the program counter
5322d404a75a00cda0b0ebed1034c2808ba060b05fJohnnie Birch    jmp         *dvmAsmInstructionJmpTable(, %edx, 4) # jump to next instruction
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