Snapshot 1c7e1e149d3dcf3949c76ae594ca9c1ca20392f9ics-mr1

1 files changed, 52 insertions, 0 deletions

diff --git a/vm/mterp/x86-atom/OP_PACKED_SWITCH.S b/vm/mterp/x86-atom/OP_PACKED_SWITCH.S
new file mode 100644
index 0000000..debac02
--- /dev/null
+++ b/vm/mterp/x86-atom/OP_PACKED_SWITCH.S
@@ -0,0 +1,52 @@
+   /* 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_PACKED_SWITCH.S
+    *
+    * Code: Jump to a new instruction using a jump table
+    *
+    * For: packed-switch, sparse-switch
+    *
+    * Description: Jump to a new instruction based on the value in the given
+    *              register, using a table of offsets corresponding to each
+    *              value in a particular integral range, or fall through to
+    *              the next instruction if there is no match.
+    *
+    * Format: AA|op BBBBlo BBBBhi (31t)
+    *
+    * Syntax: op vAA, +BBBBBBBB
+    */
+
+%default { "func":"dvmInterpHandlePackedSwitch" }
+
+    FETCH       1, %ecx                 # %ecx<- BBBBlo
+    FETCH       2, %edx                 # %edx<- BBBBhi
+    shl         $$16, %edx              # prepare to create +BBBBBBBB
+    or          %edx, %ecx              # %ecx<- +BBBBBBBB
+    GET_VREG    rINST                   # rINST<- vAA
+    movl        rINST, -4(%esp)         # push parameter vAA
+    lea         (rPC, %ecx, 2), %ecx    # %ecx<- PC + +BBBBBBBB*2
+    movl        %ecx, -8(%esp)          # push parameter PC + +BBBBBBBB*2
+    lea         -8(%esp), %esp
+    call        $func                   # call code-unit branch offset
+    shl         $$1, %eax               # shift for byte offset
+    movl        %eax, %edx              # %edx<- offset
+    lea         8(%esp), %esp
+    jle         common_periodicChecks_backwardBranch  # do backward branch
+    jmp         .L${opcode}_finish
+%break
+.L${opcode}_finish:
+    FINISH_RB   %edx, %ecx              # jump to next instruction