Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #if V8_TARGET_ARCH_ARM64 |
| 6 | |
| 7 | #include "src/crankshaft/arm64/delayed-masm-arm64.h" |
| 8 | #include "src/crankshaft/arm64/lithium-codegen-arm64.h" |
| 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | |
| 13 | #define __ ACCESS_MASM(masm_) |
| 14 | |
| 15 | |
| 16 | void DelayedMasm::StackSlotMove(LOperand* src, LOperand* dst) { |
| 17 | DCHECK((src->IsStackSlot() && dst->IsStackSlot()) || |
| 18 | (src->IsDoubleStackSlot() && dst->IsDoubleStackSlot())); |
| 19 | MemOperand src_operand = cgen_->ToMemOperand(src); |
| 20 | MemOperand dst_operand = cgen_->ToMemOperand(dst); |
| 21 | if (pending_ == kStackSlotMove) { |
| 22 | DCHECK(pending_pc_ == masm_->pc_offset()); |
| 23 | UseScratchRegisterScope scope(masm_); |
| 24 | DoubleRegister temp1 = scope.AcquireD(); |
| 25 | DoubleRegister temp2 = scope.AcquireD(); |
| 26 | switch (MemOperand::AreConsistentForPair(pending_address_src_, |
| 27 | src_operand)) { |
| 28 | case MemOperand::kNotPair: |
| 29 | __ Ldr(temp1, pending_address_src_); |
| 30 | __ Ldr(temp2, src_operand); |
| 31 | break; |
| 32 | case MemOperand::kPairAB: |
| 33 | __ Ldp(temp1, temp2, pending_address_src_); |
| 34 | break; |
| 35 | case MemOperand::kPairBA: |
| 36 | __ Ldp(temp2, temp1, src_operand); |
| 37 | break; |
| 38 | } |
| 39 | switch (MemOperand::AreConsistentForPair(pending_address_dst_, |
| 40 | dst_operand)) { |
| 41 | case MemOperand::kNotPair: |
| 42 | __ Str(temp1, pending_address_dst_); |
| 43 | __ Str(temp2, dst_operand); |
| 44 | break; |
| 45 | case MemOperand::kPairAB: |
| 46 | __ Stp(temp1, temp2, pending_address_dst_); |
| 47 | break; |
| 48 | case MemOperand::kPairBA: |
| 49 | __ Stp(temp2, temp1, dst_operand); |
| 50 | break; |
| 51 | } |
| 52 | ResetPending(); |
| 53 | return; |
| 54 | } |
| 55 | |
| 56 | EmitPending(); |
| 57 | pending_ = kStackSlotMove; |
| 58 | pending_address_src_ = src_operand; |
| 59 | pending_address_dst_ = dst_operand; |
| 60 | #ifdef DEBUG |
| 61 | pending_pc_ = masm_->pc_offset(); |
| 62 | #endif |
| 63 | } |
| 64 | |
| 65 | |
| 66 | void DelayedMasm::StoreConstant(uint64_t value, const MemOperand& operand) { |
| 67 | DCHECK(!scratch_register_acquired_); |
| 68 | if ((pending_ == kStoreConstant) && (value == pending_value_)) { |
| 69 | MemOperand::PairResult result = |
| 70 | MemOperand::AreConsistentForPair(pending_address_dst_, operand); |
| 71 | if (result != MemOperand::kNotPair) { |
| 72 | const MemOperand& dst = |
| 73 | (result == MemOperand::kPairAB) ? |
| 74 | pending_address_dst_ : |
| 75 | operand; |
| 76 | DCHECK(pending_pc_ == masm_->pc_offset()); |
| 77 | if (pending_value_ == 0) { |
| 78 | __ Stp(xzr, xzr, dst); |
| 79 | } else { |
| 80 | SetSavedValue(pending_value_); |
| 81 | __ Stp(ScratchRegister(), ScratchRegister(), dst); |
| 82 | } |
| 83 | ResetPending(); |
| 84 | return; |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | EmitPending(); |
| 89 | pending_ = kStoreConstant; |
| 90 | pending_address_dst_ = operand; |
| 91 | pending_value_ = value; |
| 92 | #ifdef DEBUG |
| 93 | pending_pc_ = masm_->pc_offset(); |
| 94 | #endif |
| 95 | } |
| 96 | |
| 97 | |
| 98 | void DelayedMasm::Load(const CPURegister& rd, const MemOperand& operand) { |
| 99 | if ((pending_ == kLoad) && |
| 100 | pending_register_.IsSameSizeAndType(rd)) { |
| 101 | switch (MemOperand::AreConsistentForPair(pending_address_src_, operand)) { |
| 102 | case MemOperand::kNotPair: |
| 103 | break; |
| 104 | case MemOperand::kPairAB: |
| 105 | DCHECK(pending_pc_ == masm_->pc_offset()); |
| 106 | DCHECK(!IsScratchRegister(pending_register_) || |
| 107 | scratch_register_acquired_); |
| 108 | DCHECK(!IsScratchRegister(rd) || scratch_register_acquired_); |
| 109 | __ Ldp(pending_register_, rd, pending_address_src_); |
| 110 | ResetPending(); |
| 111 | return; |
| 112 | case MemOperand::kPairBA: |
| 113 | DCHECK(pending_pc_ == masm_->pc_offset()); |
| 114 | DCHECK(!IsScratchRegister(pending_register_) || |
| 115 | scratch_register_acquired_); |
| 116 | DCHECK(!IsScratchRegister(rd) || scratch_register_acquired_); |
| 117 | __ Ldp(rd, pending_register_, operand); |
| 118 | ResetPending(); |
| 119 | return; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | EmitPending(); |
| 124 | pending_ = kLoad; |
| 125 | pending_register_ = rd; |
| 126 | pending_address_src_ = operand; |
| 127 | #ifdef DEBUG |
| 128 | pending_pc_ = masm_->pc_offset(); |
| 129 | #endif |
| 130 | } |
| 131 | |
| 132 | |
| 133 | void DelayedMasm::Store(const CPURegister& rd, const MemOperand& operand) { |
| 134 | if ((pending_ == kStore) && |
| 135 | pending_register_.IsSameSizeAndType(rd)) { |
| 136 | switch (MemOperand::AreConsistentForPair(pending_address_dst_, operand)) { |
| 137 | case MemOperand::kNotPair: |
| 138 | break; |
| 139 | case MemOperand::kPairAB: |
| 140 | DCHECK(pending_pc_ == masm_->pc_offset()); |
| 141 | __ Stp(pending_register_, rd, pending_address_dst_); |
| 142 | ResetPending(); |
| 143 | return; |
| 144 | case MemOperand::kPairBA: |
| 145 | DCHECK(pending_pc_ == masm_->pc_offset()); |
| 146 | __ Stp(rd, pending_register_, operand); |
| 147 | ResetPending(); |
| 148 | return; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | EmitPending(); |
| 153 | pending_ = kStore; |
| 154 | pending_register_ = rd; |
| 155 | pending_address_dst_ = operand; |
| 156 | #ifdef DEBUG |
| 157 | pending_pc_ = masm_->pc_offset(); |
| 158 | #endif |
| 159 | } |
| 160 | |
| 161 | |
| 162 | void DelayedMasm::EmitPending() { |
| 163 | DCHECK((pending_ == kNone) || (pending_pc_ == masm_->pc_offset())); |
| 164 | switch (pending_) { |
| 165 | case kNone: |
| 166 | return; |
| 167 | case kStoreConstant: |
| 168 | if (pending_value_ == 0) { |
| 169 | __ Str(xzr, pending_address_dst_); |
| 170 | } else { |
| 171 | SetSavedValue(pending_value_); |
| 172 | __ Str(ScratchRegister(), pending_address_dst_); |
| 173 | } |
| 174 | break; |
| 175 | case kLoad: |
| 176 | DCHECK(!IsScratchRegister(pending_register_) || |
| 177 | scratch_register_acquired_); |
| 178 | __ Ldr(pending_register_, pending_address_src_); |
| 179 | break; |
| 180 | case kStore: |
| 181 | __ Str(pending_register_, pending_address_dst_); |
| 182 | break; |
| 183 | case kStackSlotMove: { |
| 184 | UseScratchRegisterScope scope(masm_); |
| 185 | DoubleRegister temp = scope.AcquireD(); |
| 186 | __ Ldr(temp, pending_address_src_); |
| 187 | __ Str(temp, pending_address_dst_); |
| 188 | break; |
| 189 | } |
| 190 | } |
| 191 | ResetPending(); |
| 192 | } |
| 193 | |
| 194 | } // namespace internal |
| 195 | } // namespace v8 |
| 196 | |
| 197 | #endif // V8_TARGET_ARCH_ARM64 |