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/*
* Copyright (C) 2012 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.
*/
#include "dalvik_reg.h"
#include "ir_builder.h"
#include "dex_lang.h"
namespace art {
namespace greenland {
//----------------------------------------------------------------------------
// Dalvik Register
//----------------------------------------------------------------------------
DalvikReg::DalvikReg(DexLang& dex_lang, unsigned reg_idx)
: dex_lang_(dex_lang), irb_(dex_lang.GetIRBuilder()),
reg_idx_(reg_idx), reg_32_(NULL), reg_64_(NULL), reg_obj_(NULL) {
}
DalvikReg::~DalvikReg() {
}
llvm::Type* DalvikReg::GetRegCategoryEquivSizeTy(IRBuilder& irb, RegCategory reg_cat) {
switch (reg_cat) {
case kRegCat1nr: return irb.GetJIntTy();
case kRegCat2: return irb.GetJLongTy();
case kRegObject: return irb.GetJObjectTy();
default:
LOG(FATAL) << "Unknown register category: " << reg_cat;
return NULL;
}
}
char DalvikReg::GetRegCategoryNamePrefix(RegCategory reg_cat) {
switch (reg_cat) {
case kRegCat1nr: return 'r';
case kRegCat2: return 'w';
case kRegObject: return 'p';
default:
LOG(FATAL) << "Unknown register category: " << reg_cat;
return '\0';
}
}
inline llvm::Value* DalvikReg::RegCat1SExt(llvm::Value* value) {
return irb_.CreateSExt(value, irb_.GetJIntTy());
}
inline llvm::Value* DalvikReg::RegCat1ZExt(llvm::Value* value) {
return irb_.CreateZExt(value, irb_.GetJIntTy());
}
inline llvm::Value* DalvikReg::RegCat1Trunc(llvm::Value* value,
llvm::Type* ty) {
return irb_.CreateTrunc(value, ty);
}
llvm::Value* DalvikReg::GetValue(JType jty, JTypeSpace space) {
DCHECK_NE(jty, kVoid) << "Dalvik register will never be void type";
llvm::Value* value = NULL;
switch (space) {
case kReg:
case kField:
value = irb_.CreateLoad(GetAddr(jty));
break;
case kAccurate:
case kArray:
switch (jty) {
case kVoid:
LOG(FATAL) << "Dalvik register with void type has no value";
return NULL;
case kBoolean:
case kChar:
case kByte:
case kShort:
// NOTE: In array type space, boolean is truncated from i32 to i8, while
// in accurate type space, boolean is truncated from i32 to i1.
// For the other cases, array type space is equal to accurate type space.
value = RegCat1Trunc(irb_.CreateLoad(GetAddr(jty)),
irb_.GetJType(jty, space));
break;
case kInt:
case kLong:
case kFloat:
case kDouble:
case kObject:
value = irb_.CreateLoad(GetAddr(jty));
break;
default:
LOG(FATAL) << "Unknown java type: " << jty;
return NULL;
}
break;
default:
LOG(FATAL) << "Couldn't GetValue of JType " << jty;
return NULL;
}
if (jty == kFloat || jty == kDouble) {
value = irb_.CreateBitCast(value, irb_.GetJType(jty, space));
}
return value;
}
void DalvikReg::SetValue(JType jty, JTypeSpace space, llvm::Value* value) {
DCHECK_NE(jty, kVoid) << "Dalvik register will never be void type";
if (jty == kFloat || jty == kDouble) {
value = irb_.CreateBitCast(value, irb_.GetJType(jty, kReg));
}
switch (space) {
case kReg:
case kField:
irb_.CreateStore(value, GetAddr(jty));
return;
case kAccurate:
case kArray:
switch (jty) {
case kVoid:
break;
case kBoolean:
case kChar:
// NOTE: In accurate type space, we have to zero extend boolean from
// i1 to i32, and char from i16 to i32. In array type space, we have
// to zero extend boolean from i8 to i32, and char from i16 to i32.
irb_.CreateStore(RegCat1ZExt(value), GetAddr(jty));
break;
case kByte:
case kShort:
// NOTE: In accurate type space, we have to signed extend byte from
// i8 to i32, and short from i16 to i32. In array type space, we have
// to sign extend byte from i8 to i32, and short from i16 to i32.
irb_.CreateStore(RegCat1SExt(value), GetAddr(jty));
break;
case kInt:
case kLong:
case kFloat:
case kDouble:
case kObject:
irb_.CreateStore(value, GetAddr(jty));
break;
default:
LOG(FATAL) << "Unknown java type: " << jty;
}
}
}
llvm::Value* DalvikReg::GetAddr(JType jty) {
switch (GetRegCategoryFromJType(jty)) {
case kRegCat1nr:
if (reg_32_ == NULL) {
reg_32_ = dex_lang_.AllocateDalvikReg(kRegCat1nr, reg_idx_);
}
return reg_32_;
case kRegCat2:
if (reg_64_ == NULL) {
reg_64_ = dex_lang_.AllocateDalvikReg(kRegCat2, reg_idx_);
}
return reg_64_;
case kRegObject:
if (reg_obj_ == NULL) {
reg_obj_ = dex_lang_.AllocateDalvikReg(kRegObject, reg_idx_);
}
return reg_obj_;
default:
LOG(FATAL) << "Unexpected register category: "
<< GetRegCategoryFromJType(jty);
return NULL;
}
}
} // namespace greenland
} // namespace art
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