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/* 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
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