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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 /*
     29  * loadConstant() sometimes needs to add a small imm to a pre-existing constant
     30  */
     31 static ArmLIR *opRegImm(CompilationUnit *cUnit, OpKind op, int rDestSrc1,
     32                         int value);
     33 static ArmLIR *opRegReg(CompilationUnit *cUnit, OpKind op, int rDestSrc1,
     34                         int rSrc2);
     35 
     36 /* Forward decalraton the portable versions due to circular dependency */
     37 static bool genArithOpFloatPortable(CompilationUnit *cUnit, MIR *mir,
     38                                     RegLocation rlDest, RegLocation rlSrc1,
     39                                     RegLocation rlSrc2);
     40 
     41 static bool genArithOpDoublePortable(CompilationUnit *cUnit, MIR *mir,
     42                                      RegLocation rlDest, RegLocation rlSrc1,
     43                                      RegLocation rlSrc2);
     44 
     45 static bool genConversionPortable(CompilationUnit *cUnit, MIR *mir);
     46 
     47 static void genMonitorPortable(CompilationUnit *cUnit, MIR *mir);
     48 
     49 static void genInterpSingleStep(CompilationUnit *cUnit, MIR *mir);
     50 
     51 #if defined(WITH_SELF_VERIFICATION)
     52 /* Self Verification memory instruction decoder */
     53 void dvmSelfVerificationMemOpDecode(int lr, int* sp);
     54 #endif
     55 
     56 /*
     57  * Architecture-dependent register allocation routines implemented in
     58  * Thumb[2]/Ralloc.c
     59  */
     60 extern int dvmCompilerAllocTypedTempPair(CompilationUnit *cUnit,
     61                                          bool fpHint, int regClass);
     62 
     63 extern int dvmCompilerAllocTypedTemp(CompilationUnit *cUnit, bool fpHint,
     64                                      int regClass);
     65 
     66 extern ArmLIR* dvmCompilerRegCopyNoInsert(CompilationUnit *cUnit, int rDest,
     67                                           int rSrc);
     68 
     69 extern ArmLIR* dvmCompilerRegCopy(CompilationUnit *cUnit, int rDest, int rSrc);
     70 
     71 extern void dvmCompilerRegCopyWide(CompilationUnit *cUnit, int destLo,
     72                                    int destHi, int srcLo, int srcHi);
     73 
     74 extern void dvmCompilerFlushRegImpl(CompilationUnit *cUnit, int rBase,
     75                                     int displacement, int rSrc, OpSize size);
     76 
     77 extern void dvmCompilerFlushRegWideImpl(CompilationUnit *cUnit, int rBase,
     78                                         int displacement, int rSrcLo,
     79                                         int rSrcHi);
     80