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      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 /*
     18  * This file contains register alloction support and is intended to be
     19  * included by:
     20  *
     21  *        Codegen-$(TARGET_ARCH_VARIANT).c
     22  *
     23  */
     24 
     25 #include "compiler/CompilerIR.h"
     26 #include "CalloutHelper.h"
     27 
     28 #if defined(_CODEGEN_C)
     29 /*
     30  * loadConstant() sometimes needs to add a small imm to a pre-existing constant
     31  */
     32 static ArmLIR *opRegImm(CompilationUnit *cUnit, OpKind op, int rDestSrc1,
     33                         int value);
     34 static ArmLIR *opRegReg(CompilationUnit *cUnit, OpKind op, int rDestSrc1,
     35                         int rSrc2);
     36 
     37 /* Forward decalraton the portable versions due to circular dependency */
     38 static bool genArithOpFloatPortable(CompilationUnit *cUnit, MIR *mir,
     39                                     RegLocation rlDest, RegLocation rlSrc1,
     40                                     RegLocation rlSrc2);
     41 
     42 static bool genArithOpDoublePortable(CompilationUnit *cUnit, MIR *mir,
     43                                      RegLocation rlDest, RegLocation rlSrc1,
     44                                      RegLocation rlSrc2);
     45 
     46 static bool genConversionPortable(CompilationUnit *cUnit, MIR *mir);
     47 
     48 #if defined(WITH_DEADLOCK_PREDICTION) || defined(WITH_MONITOR_TRACKING) || \
     49     defined(__ARM_ARCH_5__)
     50 static void genMonitorPortable(CompilationUnit *cUnit, MIR *mir);
     51 #endif
     52 
     53 static void genInterpSingleStep(CompilationUnit *cUnit, MIR *mir);
     54 
     55 #endif
     56 
     57 
     58 #if defined(WITH_SELF_VERIFICATION)
     59 /* Self Verification memory instruction decoder */
     60 void dvmSelfVerificationMemOpDecode(int lr, int* sp);
     61 #endif
     62 
     63 /*
     64  * Architecture-dependent register allocation routines implemented in
     65  * Thumb[2]/Ralloc.c
     66  */
     67 extern int dvmCompilerAllocTypedTempPair(CompilationUnit *cUnit,
     68                                          bool fpHint, int regClass);
     69 
     70 extern int dvmCompilerAllocTypedTemp(CompilationUnit *cUnit, bool fpHint,
     71                                      int regClass);
     72 
     73 extern ArmLIR* dvmCompilerRegCopyNoInsert(CompilationUnit *cUnit, int rDest,
     74                                           int rSrc);
     75 
     76 extern ArmLIR* dvmCompilerRegCopy(CompilationUnit *cUnit, int rDest, int rSrc);
     77 
     78 extern void dvmCompilerRegCopyWide(CompilationUnit *cUnit, int destLo,
     79                                    int destHi, int srcLo, int srcHi);
     80 
     81 extern void dvmCompilerSetupResourceMasks(ArmLIR *lir);
     82 
     83 extern void dvmCompilerFlushRegImpl(CompilationUnit *cUnit, int rBase,
     84                                     int displacement, int rSrc, OpSize size);
     85 
     86 extern void dvmCompilerFlushRegWideImpl(CompilationUnit *cUnit, int rBase,
     87                                         int displacement, int rSrcLo,
     88                                         int rSrcHi);
     89