VM: Re-format to use at most one newline between functions

runtime/vm/instructions_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/instructions.h"
 #include "vm/instructions_arm.h"
 
@@ skipping 13 matching lines @@
   ASSERT(code.ContainsInstructionAt(pc));
   // Last instruction: blx lr.
   ASSERT(*(reinterpret_cast<uword*>(end_) - 1) == 0xe12fff3e);
 
   Register reg;
   ic_data_load_end_ = InstructionPattern::DecodeLoadWordFromPool(
       end_ - 2 * Instr::kInstrSize, &reg, &target_code_pool_index_);
   ASSERT(reg == CODE_REG);
 }
 
-
 NativeCallPattern::NativeCallPattern(uword pc, const Code& code)
     : object_pool_(ObjectPool::Handle(code.GetObjectPool())),
       end_(pc),
       native_function_pool_index_(-1),
       target_code_pool_index_(-1) {
   ASSERT(code.ContainsInstructionAt(pc));
   // Last instruction: blx lr.
   ASSERT(*(reinterpret_cast<uword*>(end_) - 1) == 0xe12fff3e);
 
   Register reg;
   uword native_function_load_end = InstructionPattern::DecodeLoadWordFromPool(
       end_ - 2 * Instr::kInstrSize, &reg, &target_code_pool_index_);
   ASSERT(reg == CODE_REG);
   InstructionPattern::DecodeLoadWordFromPool(native_function_load_end, &reg,
                                              &native_function_pool_index_);
   ASSERT(reg == R9);
 }
 
-
 RawCode* NativeCallPattern::target() const {
   return reinterpret_cast<RawCode*>(
       object_pool_.ObjectAt(target_code_pool_index_));
 }
 
-
 void NativeCallPattern::set_target(const Code& new_target) const {
   object_pool_.SetObjectAt(target_code_pool_index_, new_target);
   // No need to flush the instruction cache, since the code is not modified.
 }
 
-
 NativeFunction NativeCallPattern::native_function() const {
   return reinterpret_cast<NativeFunction>(
       object_pool_.RawValueAt(native_function_pool_index_));
 }
 
-
 void NativeCallPattern::set_native_function(NativeFunction func) const {
   object_pool_.SetRawValueAt(native_function_pool_index_,
                              reinterpret_cast<uword>(func));
 }
 
-
 // Decodes a load sequence ending at 'end' (the last instruction of the load
 // sequence is the instruction before the one at end).  Returns a pointer to
 // the first instruction in the sequence.  Returns the register being loaded
 // and the loaded object in the output parameters 'reg' and 'obj'
 // respectively.
 uword InstructionPattern::DecodeLoadObject(uword end,
                                            const ObjectPool& object_pool,
                                            Register* reg,
                                            Object* obj) {
   uword start = 0;
   Instr* instr = Instr::At(end - Instr::kInstrSize);
   if ((instr->InstructionBits() & 0xfff00000) == 0xe5900000) {
     // ldr reg, [reg, #+offset]
     intptr_t index = 0;
     start = DecodeLoadWordFromPool(end, reg, &index);
     *obj = object_pool.ObjectAt(index);
   } else {
     intptr_t value = 0;
     start = DecodeLoadWordImmediate(end, reg, &value);
     *obj = reinterpret_cast<RawObject*>(value);
   }
   return start;
 }
 
-
 // Decodes a load sequence ending at 'end' (the last instruction of the load
 // sequence is the instruction before the one at end).  Returns a pointer to
 // the first instruction in the sequence.  Returns the register being loaded
 // and the loaded immediate value in the output parameters 'reg' and 'value'
 // respectively.
 uword InstructionPattern::DecodeLoadWordImmediate(uword end,
                                                   Register* reg,
                                                   intptr_t* value) {
   uword start = end - Instr::kInstrSize;
   int32_t instr = Instr::At(start)->InstructionBits();
@@ skipping 30 matching lines @@
     }
     ASSERT((instr & 0xfff00000) == 0xe3000000);  // movw reg, #imm_lo
     imm |= (instr & 0xf0000) >> 4;
     imm |= instr & 0xfff;
     *reg = static_cast<Register>((instr & 0xf000) >> 12);
     *value = imm;
   }
   return start;
 }
 
-
 static bool IsLoadWithOffset(int32_t instr,
                              Register base,
                              intptr_t* offset,
                              Register* dst) {
   if ((instr & 0xffff0000) == (0xe5900000 | (base << 16))) {
     // ldr reg, [base, #+offset]
     *offset = instr & 0xfff;
     *dst = static_cast<Register>((instr & 0xf000) >> 12);
     return true;
   }
   return false;
 }
 
-
 // Decodes a load sequence ending at 'end' (the last instruction of the load
 // sequence is the instruction before the one at end).  Returns a pointer to
 // the first instruction in the sequence.  Returns the register being loaded
 // and the index in the pool being read from in the output parameters 'reg'
 // and 'index' respectively.
 uword InstructionPattern::DecodeLoadWordFromPool(uword end,
                                                  Register* reg,
                                                  intptr_t* index) {
   uword start = end - Instr::kInstrSize;
   int32_t instr = Instr::At(start)->InstructionBits();
@@ skipping 14 matching lines @@
     } else {
       ASSERT((instr & 0xffff0000) == (0xe0800000 | (PP << 16)));
       // add reg, pp, reg
       end = DecodeLoadWordImmediate(end, reg, &offset);
     }
   }
   *index = ObjectPool::IndexFromOffset(offset);
   return start;
 }
 
-
 bool DecodeLoadObjectFromPoolOrThread(uword pc, const Code& code, Object* obj) {
   ASSERT(code.ContainsInstructionAt(pc));
 
   int32_t instr = Instr::At(pc)->InstructionBits();
   intptr_t offset;
   Register dst;
   if (IsLoadWithOffset(instr, PP, &offset, &dst)) {
     intptr_t index = ObjectPool::IndexFromOffset(offset);
     const ObjectPool& pool = ObjectPool::Handle(code.object_pool());
     if (pool.InfoAt(index) == ObjectPool::kTaggedObject) {
       *obj = pool.ObjectAt(index);
       return true;
     }
   } else if (IsLoadWithOffset(instr, THR, &offset, &dst)) {
     return Thread::ObjectAtOffset(offset, obj);
   }
   // TODO(rmacnak): Sequence for loads beyond 12 bits.
 
   return false;
 }
 
-
 RawICData* CallPattern::IcData() {
   if (ic_data_.IsNull()) {
     Register reg;
     InstructionPattern::DecodeLoadObject(ic_data_load_end_, object_pool_, &reg,
                                          &ic_data_);
     ASSERT(reg == R9);
   }
   return ic_data_.raw();
 }
 
-
 RawCode* CallPattern::TargetCode() const {
   return reinterpret_cast<RawCode*>(
       object_pool_.ObjectAt(target_code_pool_index_));
 }
 
-
 void CallPattern::SetTargetCode(const Code& target_code) const {
   object_pool_.SetObjectAt(target_code_pool_index_, target_code);
 }
 
-
 SwitchableCallPattern::SwitchableCallPattern(uword pc, const Code& code)
     : object_pool_(ObjectPool::Handle(code.GetObjectPool())),
       data_pool_index_(-1),
       target_pool_index_(-1) {
   ASSERT(code.ContainsInstructionAt(pc));
   // Last instruction: blx lr.
   ASSERT(*(reinterpret_cast<uword*>(pc) - 1) == 0xe12fff3e);
 
   Register reg;
   uword data_load_end = InstructionPattern::DecodeLoadWordFromPool(
       pc - Instr::kInstrSize, &reg, &data_pool_index_);
   ASSERT(reg == R9);
   InstructionPattern::DecodeLoadWordFromPool(data_load_end - Instr::kInstrSize,
                                              &reg, &target_pool_index_);
   ASSERT(reg == CODE_REG);
 }
 
-
 RawObject* SwitchableCallPattern::data() const {
   return object_pool_.ObjectAt(data_pool_index_);
 }
 
-
 RawCode* SwitchableCallPattern::target() const {
   return reinterpret_cast<RawCode*>(object_pool_.ObjectAt(target_pool_index_));
 }
 
-
 void SwitchableCallPattern::SetData(const Object& data) const {
   ASSERT(!Object::Handle(object_pool_.ObjectAt(data_pool_index_)).IsCode());
   object_pool_.SetObjectAt(data_pool_index_, data);
 }
 
-
 void SwitchableCallPattern::SetTarget(const Code& target) const {
   ASSERT(Object::Handle(object_pool_.ObjectAt(target_pool_index_)).IsCode());
   object_pool_.SetObjectAt(target_pool_index_, target);
 }
 
-
 ReturnPattern::ReturnPattern(uword pc) : pc_(pc) {}
 
-
 bool ReturnPattern::IsValid() const {
   Instr* bx_lr = Instr::At(pc_);
   const int32_t B4 = 1 << 4;
   const int32_t B21 = 1 << 21;
   const int32_t B24 = 1 << 24;
   int32_t instruction = (static_cast<int32_t>(AL) << kConditionShift) | B24 |
                         B21 | (0xfff << 8) | B4 |
                         (static_cast<int32_t>(LR) << kRmShift);
   const ARMVersion version = TargetCPUFeatures::arm_version();
   if ((version == ARMv5TE) || (version == ARMv6)) {
     return bx_lr->InstructionBits() == instruction;
   } else {
     ASSERT(version == ARMv7);
     return bx_lr->InstructionBits() == instruction;
   }
   return false;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM