Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4 | |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 5 | #include <limits.h> // For LONG_MIN, LONG_MAX. |
| 6 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 7 | #include "src/v8.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 8 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 9 | #if V8_TARGET_ARCH_ARM |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 10 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 11 | #include "src/base/bits.h" |
| 12 | #include "src/base/division-by-constant.h" |
| 13 | #include "src/bootstrapper.h" |
| 14 | #include "src/codegen.h" |
| 15 | #include "src/cpu-profiler.h" |
| 16 | #include "src/debug.h" |
| 17 | #include "src/isolate-inl.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 18 | #include "src/runtime/runtime.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 19 | |
| 20 | namespace v8 { |
| 21 | namespace internal { |
| 22 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 23 | MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size) |
| 24 | : Assembler(arg_isolate, buffer, size), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 25 | generating_stub_(false), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 26 | has_frame_(false) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 27 | if (isolate() != NULL) { |
| 28 | code_object_ = Handle<Object>(isolate()->heap()->undefined_value(), |
| 29 | isolate()); |
| 30 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 31 | } |
| 32 | |
| 33 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 34 | void MacroAssembler::Jump(Register target, Condition cond) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 35 | bx(target, cond); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | |
| 39 | void MacroAssembler::Jump(intptr_t target, RelocInfo::Mode rmode, |
| 40 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 41 | DCHECK(RelocInfo::IsCodeTarget(rmode)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 42 | mov(pc, Operand(target, rmode), LeaveCC, cond); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 46 | void MacroAssembler::Jump(Address target, RelocInfo::Mode rmode, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 47 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 48 | DCHECK(!RelocInfo::IsCodeTarget(rmode)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 49 | Jump(reinterpret_cast<intptr_t>(target), rmode, cond); |
| 50 | } |
| 51 | |
| 52 | |
| 53 | void MacroAssembler::Jump(Handle<Code> code, RelocInfo::Mode rmode, |
| 54 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 55 | DCHECK(RelocInfo::IsCodeTarget(rmode)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 56 | // 'code' is always generated ARM code, never THUMB code |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 57 | AllowDeferredHandleDereference embedding_raw_address; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 58 | Jump(reinterpret_cast<intptr_t>(code.location()), rmode, cond); |
| 59 | } |
| 60 | |
| 61 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 62 | int MacroAssembler::CallSize(Register target, Condition cond) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 63 | return kInstrSize; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 67 | void MacroAssembler::Call(Register target, Condition cond) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 68 | // Block constant pool for the call instruction sequence. |
| 69 | BlockConstPoolScope block_const_pool(this); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 70 | Label start; |
| 71 | bind(&start); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 72 | blx(target, cond); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 73 | DCHECK_EQ(CallSize(target, cond), SizeOfCodeGeneratedSince(&start)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 77 | int MacroAssembler::CallSize( |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 78 | Address target, RelocInfo::Mode rmode, Condition cond) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 79 | Instr mov_instr = cond | MOV | LeaveCC; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 80 | Operand mov_operand = Operand(reinterpret_cast<intptr_t>(target), rmode); |
| 81 | return kInstrSize + |
| 82 | mov_operand.instructions_required(this, mov_instr) * kInstrSize; |
| 83 | } |
| 84 | |
| 85 | |
| 86 | int MacroAssembler::CallStubSize( |
| 87 | CodeStub* stub, TypeFeedbackId ast_id, Condition cond) { |
| 88 | return CallSize(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id, cond); |
| 89 | } |
| 90 | |
| 91 | |
| 92 | int MacroAssembler::CallSizeNotPredictableCodeSize(Isolate* isolate, |
| 93 | Address target, |
| 94 | RelocInfo::Mode rmode, |
| 95 | Condition cond) { |
| 96 | Instr mov_instr = cond | MOV | LeaveCC; |
| 97 | Operand mov_operand = Operand(reinterpret_cast<intptr_t>(target), rmode); |
| 98 | return kInstrSize + |
| 99 | mov_operand.instructions_required(NULL, mov_instr) * kInstrSize; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 103 | void MacroAssembler::Call(Address target, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 104 | RelocInfo::Mode rmode, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 105 | Condition cond, |
| 106 | TargetAddressStorageMode mode) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 107 | // Block constant pool for the call instruction sequence. |
| 108 | BlockConstPoolScope block_const_pool(this); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 109 | Label start; |
| 110 | bind(&start); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 111 | |
| 112 | bool old_predictable_code_size = predictable_code_size(); |
| 113 | if (mode == NEVER_INLINE_TARGET_ADDRESS) { |
| 114 | set_predictable_code_size(true); |
| 115 | } |
| 116 | |
| 117 | #ifdef DEBUG |
| 118 | // Check the expected size before generating code to ensure we assume the same |
| 119 | // constant pool availability (e.g., whether constant pool is full or not). |
| 120 | int expected_size = CallSize(target, rmode, cond); |
| 121 | #endif |
| 122 | |
| 123 | // Call sequence on V7 or later may be : |
| 124 | // movw ip, #... @ call address low 16 |
| 125 | // movt ip, #... @ call address high 16 |
| 126 | // blx ip |
| 127 | // @ return address |
| 128 | // Or for pre-V7 or values that may be back-patched |
| 129 | // to avoid ICache flushes: |
| 130 | // ldr ip, [pc, #...] @ call address |
| 131 | // blx ip |
| 132 | // @ return address |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 133 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 134 | // Statement positions are expected to be recorded when the target |
| 135 | // address is loaded. The mov method will automatically record |
| 136 | // positions when pc is the target, since this is not the case here |
| 137 | // we have to do it explicitly. |
| 138 | positions_recorder()->WriteRecordedPositions(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 139 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 140 | mov(ip, Operand(reinterpret_cast<int32_t>(target), rmode)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 141 | blx(ip, cond); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 142 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 143 | DCHECK_EQ(expected_size, SizeOfCodeGeneratedSince(&start)); |
| 144 | if (mode == NEVER_INLINE_TARGET_ADDRESS) { |
| 145 | set_predictable_code_size(old_predictable_code_size); |
| 146 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 150 | int MacroAssembler::CallSize(Handle<Code> code, |
| 151 | RelocInfo::Mode rmode, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 152 | TypeFeedbackId ast_id, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 153 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 154 | AllowDeferredHandleDereference using_raw_address; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 155 | return CallSize(reinterpret_cast<Address>(code.location()), rmode, cond); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | |
| 159 | void MacroAssembler::Call(Handle<Code> code, |
| 160 | RelocInfo::Mode rmode, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 161 | TypeFeedbackId ast_id, |
| 162 | Condition cond, |
| 163 | TargetAddressStorageMode mode) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 164 | Label start; |
| 165 | bind(&start); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 166 | DCHECK(RelocInfo::IsCodeTarget(rmode)); |
| 167 | if (rmode == RelocInfo::CODE_TARGET && !ast_id.IsNone()) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 168 | SetRecordedAstId(ast_id); |
| 169 | rmode = RelocInfo::CODE_TARGET_WITH_ID; |
| 170 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 171 | // 'code' is always generated ARM code, never THUMB code |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 172 | AllowDeferredHandleDereference embedding_raw_address; |
| 173 | Call(reinterpret_cast<Address>(code.location()), rmode, cond, mode); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | |
| 177 | void MacroAssembler::Ret(Condition cond) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 178 | bx(lr, cond); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 182 | void MacroAssembler::Drop(int count, Condition cond) { |
| 183 | if (count > 0) { |
| 184 | add(sp, sp, Operand(count * kPointerSize), LeaveCC, cond); |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 189 | void MacroAssembler::Ret(int drop, Condition cond) { |
| 190 | Drop(drop, cond); |
| 191 | Ret(cond); |
| 192 | } |
| 193 | |
| 194 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 195 | void MacroAssembler::Swap(Register reg1, |
| 196 | Register reg2, |
| 197 | Register scratch, |
| 198 | Condition cond) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 199 | if (scratch.is(no_reg)) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 200 | eor(reg1, reg1, Operand(reg2), LeaveCC, cond); |
| 201 | eor(reg2, reg2, Operand(reg1), LeaveCC, cond); |
| 202 | eor(reg1, reg1, Operand(reg2), LeaveCC, cond); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 203 | } else { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 204 | mov(scratch, reg1, LeaveCC, cond); |
| 205 | mov(reg1, reg2, LeaveCC, cond); |
| 206 | mov(reg2, scratch, LeaveCC, cond); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 207 | } |
| 208 | } |
| 209 | |
| 210 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 211 | void MacroAssembler::Call(Label* target) { |
| 212 | bl(target); |
| 213 | } |
| 214 | |
| 215 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 216 | void MacroAssembler::Push(Handle<Object> handle) { |
| 217 | mov(ip, Operand(handle)); |
| 218 | push(ip); |
| 219 | } |
| 220 | |
| 221 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 222 | void MacroAssembler::Move(Register dst, Handle<Object> value) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 223 | AllowDeferredHandleDereference smi_check; |
| 224 | if (value->IsSmi()) { |
| 225 | mov(dst, Operand(value)); |
| 226 | } else { |
| 227 | DCHECK(value->IsHeapObject()); |
| 228 | if (isolate()->heap()->InNewSpace(*value)) { |
| 229 | Handle<Cell> cell = isolate()->factory()->NewCell(value); |
| 230 | mov(dst, Operand(cell)); |
| 231 | ldr(dst, FieldMemOperand(dst, Cell::kValueOffset)); |
| 232 | } else { |
| 233 | mov(dst, Operand(value)); |
| 234 | } |
| 235 | } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 236 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 237 | |
| 238 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 239 | void MacroAssembler::Move(Register dst, Register src, Condition cond) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 240 | if (!dst.is(src)) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 241 | mov(dst, src, LeaveCC, cond); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 242 | } |
| 243 | } |
| 244 | |
| 245 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 246 | void MacroAssembler::Move(DwVfpRegister dst, DwVfpRegister src) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 247 | if (!dst.is(src)) { |
| 248 | vmov(dst, src); |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 253 | void MacroAssembler::Mls(Register dst, Register src1, Register src2, |
| 254 | Register srcA, Condition cond) { |
| 255 | if (CpuFeatures::IsSupported(MLS)) { |
| 256 | CpuFeatureScope scope(this, MLS); |
| 257 | mls(dst, src1, src2, srcA, cond); |
| 258 | } else { |
| 259 | DCHECK(!srcA.is(ip)); |
| 260 | mul(ip, src1, src2, LeaveCC, cond); |
| 261 | sub(dst, srcA, ip, LeaveCC, cond); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 266 | void MacroAssembler::And(Register dst, Register src1, const Operand& src2, |
| 267 | Condition cond) { |
Teng-Hui Zhu | 3e5fa29 | 2010-11-09 16:16:48 -0800 | [diff] [blame] | 268 | if (!src2.is_reg() && |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 269 | !src2.must_output_reloc_info(this) && |
Teng-Hui Zhu | 3e5fa29 | 2010-11-09 16:16:48 -0800 | [diff] [blame] | 270 | src2.immediate() == 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 271 | mov(dst, Operand::Zero(), LeaveCC, cond); |
| 272 | } else if (!(src2.instructions_required(this) == 1) && |
| 273 | !src2.must_output_reloc_info(this) && |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 274 | CpuFeatures::IsSupported(ARMv7) && |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 275 | base::bits::IsPowerOfTwo32(src2.immediate() + 1)) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 276 | ubfx(dst, src1, 0, |
| 277 | WhichPowerOf2(static_cast<uint32_t>(src2.immediate()) + 1), cond); |
Teng-Hui Zhu | 3e5fa29 | 2010-11-09 16:16:48 -0800 | [diff] [blame] | 278 | } else { |
| 279 | and_(dst, src1, src2, LeaveCC, cond); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 280 | } |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | |
| 284 | void MacroAssembler::Ubfx(Register dst, Register src1, int lsb, int width, |
| 285 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 286 | DCHECK(lsb < 32); |
| 287 | if (!CpuFeatures::IsSupported(ARMv7) || predictable_code_size()) { |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 288 | int mask = (1 << (width + lsb)) - 1 - ((1 << lsb) - 1); |
| 289 | and_(dst, src1, Operand(mask), LeaveCC, cond); |
| 290 | if (lsb != 0) { |
| 291 | mov(dst, Operand(dst, LSR, lsb), LeaveCC, cond); |
| 292 | } |
| 293 | } else { |
| 294 | ubfx(dst, src1, lsb, width, cond); |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | |
| 299 | void MacroAssembler::Sbfx(Register dst, Register src1, int lsb, int width, |
| 300 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 301 | DCHECK(lsb < 32); |
| 302 | if (!CpuFeatures::IsSupported(ARMv7) || predictable_code_size()) { |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 303 | int mask = (1 << (width + lsb)) - 1 - ((1 << lsb) - 1); |
| 304 | and_(dst, src1, Operand(mask), LeaveCC, cond); |
| 305 | int shift_up = 32 - lsb - width; |
| 306 | int shift_down = lsb + shift_up; |
| 307 | if (shift_up != 0) { |
| 308 | mov(dst, Operand(dst, LSL, shift_up), LeaveCC, cond); |
| 309 | } |
| 310 | if (shift_down != 0) { |
| 311 | mov(dst, Operand(dst, ASR, shift_down), LeaveCC, cond); |
| 312 | } |
| 313 | } else { |
| 314 | sbfx(dst, src1, lsb, width, cond); |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 319 | void MacroAssembler::Bfi(Register dst, |
| 320 | Register src, |
| 321 | Register scratch, |
| 322 | int lsb, |
| 323 | int width, |
| 324 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 325 | DCHECK(0 <= lsb && lsb < 32); |
| 326 | DCHECK(0 <= width && width < 32); |
| 327 | DCHECK(lsb + width < 32); |
| 328 | DCHECK(!scratch.is(dst)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 329 | if (width == 0) return; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 330 | if (!CpuFeatures::IsSupported(ARMv7) || predictable_code_size()) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 331 | int mask = (1 << (width + lsb)) - 1 - ((1 << lsb) - 1); |
| 332 | bic(dst, dst, Operand(mask)); |
| 333 | and_(scratch, src, Operand((1 << width) - 1)); |
| 334 | mov(scratch, Operand(scratch, LSL, lsb)); |
| 335 | orr(dst, dst, scratch); |
| 336 | } else { |
| 337 | bfi(dst, src, lsb, width, cond); |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 342 | void MacroAssembler::Bfc(Register dst, Register src, int lsb, int width, |
| 343 | Condition cond) { |
| 344 | DCHECK(lsb < 32); |
| 345 | if (!CpuFeatures::IsSupported(ARMv7) || predictable_code_size()) { |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 346 | int mask = (1 << (width + lsb)) - 1 - ((1 << lsb) - 1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 347 | bic(dst, src, Operand(mask)); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 348 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 349 | Move(dst, src, cond); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 350 | bfc(dst, lsb, width, cond); |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 355 | void MacroAssembler::Usat(Register dst, int satpos, const Operand& src, |
| 356 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 357 | if (!CpuFeatures::IsSupported(ARMv7) || predictable_code_size()) { |
| 358 | DCHECK(!dst.is(pc) && !src.rm().is(pc)); |
| 359 | DCHECK((satpos >= 0) && (satpos <= 31)); |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 360 | |
| 361 | // These asserts are required to ensure compatibility with the ARMv7 |
| 362 | // implementation. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 363 | DCHECK((src.shift_op() == ASR) || (src.shift_op() == LSL)); |
| 364 | DCHECK(src.rs().is(no_reg)); |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 365 | |
| 366 | Label done; |
| 367 | int satval = (1 << satpos) - 1; |
| 368 | |
| 369 | if (cond != al) { |
| 370 | b(NegateCondition(cond), &done); // Skip saturate if !condition. |
| 371 | } |
| 372 | if (!(src.is_reg() && dst.is(src.rm()))) { |
| 373 | mov(dst, src); |
| 374 | } |
| 375 | tst(dst, Operand(~satval)); |
| 376 | b(eq, &done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 377 | mov(dst, Operand::Zero(), LeaveCC, mi); // 0 if negative. |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 378 | mov(dst, Operand(satval), LeaveCC, pl); // satval if positive. |
| 379 | bind(&done); |
| 380 | } else { |
| 381 | usat(dst, satpos, src, cond); |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 386 | void MacroAssembler::Load(Register dst, |
| 387 | const MemOperand& src, |
| 388 | Representation r) { |
| 389 | DCHECK(!r.IsDouble()); |
| 390 | if (r.IsInteger8()) { |
| 391 | ldrsb(dst, src); |
| 392 | } else if (r.IsUInteger8()) { |
| 393 | ldrb(dst, src); |
| 394 | } else if (r.IsInteger16()) { |
| 395 | ldrsh(dst, src); |
| 396 | } else if (r.IsUInteger16()) { |
| 397 | ldrh(dst, src); |
| 398 | } else { |
| 399 | ldr(dst, src); |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | |
| 404 | void MacroAssembler::Store(Register src, |
| 405 | const MemOperand& dst, |
| 406 | Representation r) { |
| 407 | DCHECK(!r.IsDouble()); |
| 408 | if (r.IsInteger8() || r.IsUInteger8()) { |
| 409 | strb(src, dst); |
| 410 | } else if (r.IsInteger16() || r.IsUInteger16()) { |
| 411 | strh(src, dst); |
| 412 | } else { |
| 413 | if (r.IsHeapObject()) { |
| 414 | AssertNotSmi(src); |
| 415 | } else if (r.IsSmi()) { |
| 416 | AssertSmi(src); |
| 417 | } |
| 418 | str(src, dst); |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 423 | void MacroAssembler::LoadRoot(Register destination, |
| 424 | Heap::RootListIndex index, |
| 425 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 426 | if (CpuFeatures::IsSupported(MOVW_MOVT_IMMEDIATE_LOADS) && |
| 427 | isolate()->heap()->RootCanBeTreatedAsConstant(index) && |
| 428 | !predictable_code_size()) { |
| 429 | // The CPU supports fast immediate values, and this root will never |
| 430 | // change. We will load it as a relocatable immediate value. |
| 431 | Handle<Object> root(&isolate()->heap()->roots_array_start()[index]); |
| 432 | mov(destination, Operand(root), LeaveCC, cond); |
| 433 | return; |
| 434 | } |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 435 | ldr(destination, MemOperand(kRootRegister, index << kPointerSizeLog2), cond); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 436 | } |
| 437 | |
| 438 | |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 439 | void MacroAssembler::StoreRoot(Register source, |
| 440 | Heap::RootListIndex index, |
| 441 | Condition cond) { |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 442 | str(source, MemOperand(kRootRegister, index << kPointerSizeLog2), cond); |
| 443 | } |
| 444 | |
| 445 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 446 | void MacroAssembler::InNewSpace(Register object, |
| 447 | Register scratch, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 448 | Condition cond, |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 449 | Label* branch) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 450 | DCHECK(cond == eq || cond == ne); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 451 | and_(scratch, object, Operand(ExternalReference::new_space_mask(isolate()))); |
| 452 | cmp(scratch, Operand(ExternalReference::new_space_start(isolate()))); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 453 | b(cond, branch); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 457 | void MacroAssembler::RecordWriteField( |
| 458 | Register object, |
| 459 | int offset, |
| 460 | Register value, |
| 461 | Register dst, |
| 462 | LinkRegisterStatus lr_status, |
| 463 | SaveFPRegsMode save_fp, |
| 464 | RememberedSetAction remembered_set_action, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 465 | SmiCheck smi_check, |
| 466 | PointersToHereCheck pointers_to_here_check_for_value) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 467 | // First, check if a write barrier is even needed. The tests below |
| 468 | // catch stores of Smis. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 469 | Label done; |
| 470 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 471 | // Skip barrier if writing a smi. |
| 472 | if (smi_check == INLINE_SMI_CHECK) { |
| 473 | JumpIfSmi(value, &done); |
| 474 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 475 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 476 | // Although the object register is tagged, the offset is relative to the start |
| 477 | // of the object, so so offset must be a multiple of kPointerSize. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 478 | DCHECK(IsAligned(offset, kPointerSize)); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 479 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 480 | add(dst, object, Operand(offset - kHeapObjectTag)); |
| 481 | if (emit_debug_code()) { |
| 482 | Label ok; |
| 483 | tst(dst, Operand((1 << kPointerSizeLog2) - 1)); |
| 484 | b(eq, &ok); |
| 485 | stop("Unaligned cell in write barrier"); |
| 486 | bind(&ok); |
| 487 | } |
| 488 | |
| 489 | RecordWrite(object, |
| 490 | dst, |
| 491 | value, |
| 492 | lr_status, |
| 493 | save_fp, |
| 494 | remembered_set_action, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 495 | OMIT_SMI_CHECK, |
| 496 | pointers_to_here_check_for_value); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 497 | |
| 498 | bind(&done); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 499 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 500 | // Clobber clobbered input registers when running with the debug-code flag |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 501 | // turned on to provoke errors. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 502 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 503 | mov(value, Operand(bit_cast<int32_t>(kZapValue + 4))); |
| 504 | mov(dst, Operand(bit_cast<int32_t>(kZapValue + 8))); |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | |
| 509 | // Will clobber 4 registers: object, map, dst, ip. The |
| 510 | // register 'object' contains a heap object pointer. |
| 511 | void MacroAssembler::RecordWriteForMap(Register object, |
| 512 | Register map, |
| 513 | Register dst, |
| 514 | LinkRegisterStatus lr_status, |
| 515 | SaveFPRegsMode fp_mode) { |
| 516 | if (emit_debug_code()) { |
| 517 | ldr(dst, FieldMemOperand(map, HeapObject::kMapOffset)); |
| 518 | cmp(dst, Operand(isolate()->factory()->meta_map())); |
| 519 | Check(eq, kWrongAddressOrValuePassedToRecordWrite); |
| 520 | } |
| 521 | |
| 522 | if (!FLAG_incremental_marking) { |
| 523 | return; |
| 524 | } |
| 525 | |
| 526 | if (emit_debug_code()) { |
| 527 | ldr(ip, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 528 | cmp(ip, map); |
| 529 | Check(eq, kWrongAddressOrValuePassedToRecordWrite); |
| 530 | } |
| 531 | |
| 532 | Label done; |
| 533 | |
| 534 | // A single check of the map's pages interesting flag suffices, since it is |
| 535 | // only set during incremental collection, and then it's also guaranteed that |
| 536 | // the from object's page's interesting flag is also set. This optimization |
| 537 | // relies on the fact that maps can never be in new space. |
| 538 | CheckPageFlag(map, |
| 539 | map, // Used as scratch. |
| 540 | MemoryChunk::kPointersToHereAreInterestingMask, |
| 541 | eq, |
| 542 | &done); |
| 543 | |
| 544 | add(dst, object, Operand(HeapObject::kMapOffset - kHeapObjectTag)); |
| 545 | if (emit_debug_code()) { |
| 546 | Label ok; |
| 547 | tst(dst, Operand((1 << kPointerSizeLog2) - 1)); |
| 548 | b(eq, &ok); |
| 549 | stop("Unaligned cell in write barrier"); |
| 550 | bind(&ok); |
| 551 | } |
| 552 | |
| 553 | // Record the actual write. |
| 554 | if (lr_status == kLRHasNotBeenSaved) { |
| 555 | push(lr); |
| 556 | } |
| 557 | RecordWriteStub stub(isolate(), object, map, dst, OMIT_REMEMBERED_SET, |
| 558 | fp_mode); |
| 559 | CallStub(&stub); |
| 560 | if (lr_status == kLRHasNotBeenSaved) { |
| 561 | pop(lr); |
| 562 | } |
| 563 | |
| 564 | bind(&done); |
| 565 | |
| 566 | // Count number of write barriers in generated code. |
| 567 | isolate()->counters()->write_barriers_static()->Increment(); |
| 568 | IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1, ip, dst); |
| 569 | |
| 570 | // Clobber clobbered registers when running with the debug-code flag |
| 571 | // turned on to provoke errors. |
| 572 | if (emit_debug_code()) { |
| 573 | mov(dst, Operand(bit_cast<int32_t>(kZapValue + 12))); |
| 574 | mov(map, Operand(bit_cast<int32_t>(kZapValue + 16))); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 575 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 576 | } |
| 577 | |
| 578 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 579 | // Will clobber 4 registers: object, address, scratch, ip. The |
| 580 | // register 'object' contains a heap object pointer. The heap object |
| 581 | // tag is shifted away. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 582 | void MacroAssembler::RecordWrite( |
| 583 | Register object, |
| 584 | Register address, |
| 585 | Register value, |
| 586 | LinkRegisterStatus lr_status, |
| 587 | SaveFPRegsMode fp_mode, |
| 588 | RememberedSetAction remembered_set_action, |
| 589 | SmiCheck smi_check, |
| 590 | PointersToHereCheck pointers_to_here_check_for_value) { |
| 591 | DCHECK(!object.is(value)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 592 | if (emit_debug_code()) { |
| 593 | ldr(ip, MemOperand(address)); |
| 594 | cmp(ip, value); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 595 | Check(eq, kWrongAddressOrValuePassedToRecordWrite); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 596 | } |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 597 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 598 | if (remembered_set_action == OMIT_REMEMBERED_SET && |
| 599 | !FLAG_incremental_marking) { |
| 600 | return; |
| 601 | } |
| 602 | |
| 603 | // First, check if a write barrier is even needed. The tests below |
| 604 | // catch stores of smis and stores into the young generation. |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 605 | Label done; |
| 606 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 607 | if (smi_check == INLINE_SMI_CHECK) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 608 | JumpIfSmi(value, &done); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 609 | } |
| 610 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 611 | if (pointers_to_here_check_for_value != kPointersToHereAreAlwaysInteresting) { |
| 612 | CheckPageFlag(value, |
| 613 | value, // Used as scratch. |
| 614 | MemoryChunk::kPointersToHereAreInterestingMask, |
| 615 | eq, |
| 616 | &done); |
| 617 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 618 | CheckPageFlag(object, |
| 619 | value, // Used as scratch. |
| 620 | MemoryChunk::kPointersFromHereAreInterestingMask, |
| 621 | eq, |
| 622 | &done); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 623 | |
| 624 | // Record the actual write. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 625 | if (lr_status == kLRHasNotBeenSaved) { |
| 626 | push(lr); |
| 627 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 628 | RecordWriteStub stub(isolate(), object, value, address, remembered_set_action, |
| 629 | fp_mode); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 630 | CallStub(&stub); |
| 631 | if (lr_status == kLRHasNotBeenSaved) { |
| 632 | pop(lr); |
| 633 | } |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 634 | |
| 635 | bind(&done); |
| 636 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 637 | // Count number of write barriers in generated code. |
| 638 | isolate()->counters()->write_barriers_static()->Increment(); |
| 639 | IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1, ip, |
| 640 | value); |
| 641 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 642 | // Clobber clobbered registers when running with the debug-code flag |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 643 | // turned on to provoke errors. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 644 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 645 | mov(address, Operand(bit_cast<int32_t>(kZapValue + 12))); |
| 646 | mov(value, Operand(bit_cast<int32_t>(kZapValue + 16))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 647 | } |
| 648 | } |
| 649 | |
| 650 | |
| 651 | void MacroAssembler::RememberedSetHelper(Register object, // For debug tests. |
| 652 | Register address, |
| 653 | Register scratch, |
| 654 | SaveFPRegsMode fp_mode, |
| 655 | RememberedSetFinalAction and_then) { |
| 656 | Label done; |
| 657 | if (emit_debug_code()) { |
| 658 | Label ok; |
| 659 | JumpIfNotInNewSpace(object, scratch, &ok); |
| 660 | stop("Remembered set pointer is in new space"); |
| 661 | bind(&ok); |
| 662 | } |
| 663 | // Load store buffer top. |
| 664 | ExternalReference store_buffer = |
| 665 | ExternalReference::store_buffer_top(isolate()); |
| 666 | mov(ip, Operand(store_buffer)); |
| 667 | ldr(scratch, MemOperand(ip)); |
| 668 | // Store pointer to buffer and increment buffer top. |
| 669 | str(address, MemOperand(scratch, kPointerSize, PostIndex)); |
| 670 | // Write back new top of buffer. |
| 671 | str(scratch, MemOperand(ip)); |
| 672 | // Call stub on end of buffer. |
| 673 | // Check for end of buffer. |
| 674 | tst(scratch, Operand(StoreBuffer::kStoreBufferOverflowBit)); |
| 675 | if (and_then == kFallThroughAtEnd) { |
| 676 | b(eq, &done); |
| 677 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 678 | DCHECK(and_then == kReturnAtEnd); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 679 | Ret(eq); |
| 680 | } |
| 681 | push(lr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 682 | StoreBufferOverflowStub store_buffer_overflow(isolate(), fp_mode); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 683 | CallStub(&store_buffer_overflow); |
| 684 | pop(lr); |
| 685 | bind(&done); |
| 686 | if (and_then == kReturnAtEnd) { |
| 687 | Ret(); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 688 | } |
| 689 | } |
| 690 | |
| 691 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 692 | void MacroAssembler::PushFixedFrame(Register marker_reg) { |
| 693 | DCHECK(!marker_reg.is_valid() || marker_reg.code() < cp.code()); |
| 694 | stm(db_w, sp, (marker_reg.is_valid() ? marker_reg.bit() : 0) | |
| 695 | cp.bit() | |
| 696 | (FLAG_enable_ool_constant_pool ? pp.bit() : 0) | |
| 697 | fp.bit() | |
| 698 | lr.bit()); |
| 699 | } |
| 700 | |
| 701 | |
| 702 | void MacroAssembler::PopFixedFrame(Register marker_reg) { |
| 703 | DCHECK(!marker_reg.is_valid() || marker_reg.code() < cp.code()); |
| 704 | ldm(ia_w, sp, (marker_reg.is_valid() ? marker_reg.bit() : 0) | |
| 705 | cp.bit() | |
| 706 | (FLAG_enable_ool_constant_pool ? pp.bit() : 0) | |
| 707 | fp.bit() | |
| 708 | lr.bit()); |
| 709 | } |
| 710 | |
| 711 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 712 | // Push and pop all registers that can hold pointers. |
| 713 | void MacroAssembler::PushSafepointRegisters() { |
| 714 | // Safepoints expect a block of contiguous register values starting with r0: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 715 | DCHECK(((1 << kNumSafepointSavedRegisters) - 1) == kSafepointSavedRegisters); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 716 | // Safepoints expect a block of kNumSafepointRegisters values on the |
| 717 | // stack, so adjust the stack for unsaved registers. |
| 718 | const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 719 | DCHECK(num_unsaved >= 0); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 720 | sub(sp, sp, Operand(num_unsaved * kPointerSize)); |
| 721 | stm(db_w, sp, kSafepointSavedRegisters); |
| 722 | } |
| 723 | |
| 724 | |
| 725 | void MacroAssembler::PopSafepointRegisters() { |
| 726 | const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters; |
| 727 | ldm(ia_w, sp, kSafepointSavedRegisters); |
| 728 | add(sp, sp, Operand(num_unsaved * kPointerSize)); |
| 729 | } |
| 730 | |
| 731 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 732 | void MacroAssembler::StoreToSafepointRegisterSlot(Register src, Register dst) { |
| 733 | str(src, SafepointRegisterSlot(dst)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 734 | } |
| 735 | |
| 736 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 737 | void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) { |
| 738 | ldr(dst, SafepointRegisterSlot(src)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 739 | } |
| 740 | |
| 741 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 742 | int MacroAssembler::SafepointRegisterStackIndex(int reg_code) { |
| 743 | // The registers are pushed starting with the highest encoding, |
| 744 | // which means that lowest encodings are closest to the stack pointer. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 745 | DCHECK(reg_code >= 0 && reg_code < kNumSafepointRegisters); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 746 | return reg_code; |
| 747 | } |
| 748 | |
| 749 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 750 | MemOperand MacroAssembler::SafepointRegisterSlot(Register reg) { |
| 751 | return MemOperand(sp, SafepointRegisterStackIndex(reg.code()) * kPointerSize); |
| 752 | } |
| 753 | |
| 754 | |
| 755 | MemOperand MacroAssembler::SafepointRegistersAndDoublesSlot(Register reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 756 | // Number of d-regs not known at snapshot time. |
| 757 | DCHECK(!serializer_enabled()); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 758 | // General purpose registers are pushed last on the stack. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 759 | int doubles_size = DwVfpRegister::NumAllocatableRegisters() * kDoubleSize; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 760 | int register_offset = SafepointRegisterStackIndex(reg.code()) * kPointerSize; |
| 761 | return MemOperand(sp, doubles_size + register_offset); |
| 762 | } |
| 763 | |
| 764 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 765 | void MacroAssembler::Ldrd(Register dst1, Register dst2, |
| 766 | const MemOperand& src, Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 767 | DCHECK(src.rm().is(no_reg)); |
| 768 | DCHECK(!dst1.is(lr)); // r14. |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 769 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 770 | // V8 does not use this addressing mode, so the fallback code |
| 771 | // below doesn't support it yet. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 772 | DCHECK((src.am() != PreIndex) && (src.am() != NegPreIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 773 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 774 | // Generate two ldr instructions if ldrd is not available. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 775 | if (CpuFeatures::IsSupported(ARMv7) && !predictable_code_size() && |
| 776 | (dst1.code() % 2 == 0) && (dst1.code() + 1 == dst2.code())) { |
| 777 | CpuFeatureScope scope(this, ARMv7); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 778 | ldrd(dst1, dst2, src, cond); |
| 779 | } else { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 780 | if ((src.am() == Offset) || (src.am() == NegOffset)) { |
| 781 | MemOperand src2(src); |
| 782 | src2.set_offset(src2.offset() + 4); |
| 783 | if (dst1.is(src.rn())) { |
| 784 | ldr(dst2, src2, cond); |
| 785 | ldr(dst1, src, cond); |
| 786 | } else { |
| 787 | ldr(dst1, src, cond); |
| 788 | ldr(dst2, src2, cond); |
| 789 | } |
| 790 | } else { // PostIndex or NegPostIndex. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 791 | DCHECK((src.am() == PostIndex) || (src.am() == NegPostIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 792 | if (dst1.is(src.rn())) { |
| 793 | ldr(dst2, MemOperand(src.rn(), 4, Offset), cond); |
| 794 | ldr(dst1, src, cond); |
| 795 | } else { |
| 796 | MemOperand src2(src); |
| 797 | src2.set_offset(src2.offset() - 4); |
| 798 | ldr(dst1, MemOperand(src.rn(), 4, PostIndex), cond); |
| 799 | ldr(dst2, src2, cond); |
| 800 | } |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 801 | } |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | |
| 806 | void MacroAssembler::Strd(Register src1, Register src2, |
| 807 | const MemOperand& dst, Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 808 | DCHECK(dst.rm().is(no_reg)); |
| 809 | DCHECK(!src1.is(lr)); // r14. |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 810 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 811 | // V8 does not use this addressing mode, so the fallback code |
| 812 | // below doesn't support it yet. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 813 | DCHECK((dst.am() != PreIndex) && (dst.am() != NegPreIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 814 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 815 | // Generate two str instructions if strd is not available. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 816 | if (CpuFeatures::IsSupported(ARMv7) && !predictable_code_size() && |
| 817 | (src1.code() % 2 == 0) && (src1.code() + 1 == src2.code())) { |
| 818 | CpuFeatureScope scope(this, ARMv7); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 819 | strd(src1, src2, dst, cond); |
| 820 | } else { |
| 821 | MemOperand dst2(dst); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 822 | if ((dst.am() == Offset) || (dst.am() == NegOffset)) { |
| 823 | dst2.set_offset(dst2.offset() + 4); |
| 824 | str(src1, dst, cond); |
| 825 | str(src2, dst2, cond); |
| 826 | } else { // PostIndex or NegPostIndex. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 827 | DCHECK((dst.am() == PostIndex) || (dst.am() == NegPostIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 828 | dst2.set_offset(dst2.offset() - 4); |
| 829 | str(src1, MemOperand(dst.rn(), 4, PostIndex), cond); |
| 830 | str(src2, dst2, cond); |
| 831 | } |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 832 | } |
| 833 | } |
| 834 | |
| 835 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 836 | void MacroAssembler::VFPEnsureFPSCRState(Register scratch) { |
| 837 | // If needed, restore wanted bits of FPSCR. |
| 838 | Label fpscr_done; |
| 839 | vmrs(scratch); |
| 840 | if (emit_debug_code()) { |
| 841 | Label rounding_mode_correct; |
| 842 | tst(scratch, Operand(kVFPRoundingModeMask)); |
| 843 | b(eq, &rounding_mode_correct); |
| 844 | // Don't call Assert here, since Runtime_Abort could re-enter here. |
| 845 | stop("Default rounding mode not set"); |
| 846 | bind(&rounding_mode_correct); |
| 847 | } |
| 848 | tst(scratch, Operand(kVFPDefaultNaNModeControlBit)); |
| 849 | b(ne, &fpscr_done); |
| 850 | orr(scratch, scratch, Operand(kVFPDefaultNaNModeControlBit)); |
| 851 | vmsr(scratch); |
| 852 | bind(&fpscr_done); |
| 853 | } |
| 854 | |
| 855 | |
| 856 | void MacroAssembler::VFPCanonicalizeNaN(const DwVfpRegister dst, |
| 857 | const DwVfpRegister src, |
| 858 | const Condition cond) { |
| 859 | vsub(dst, src, kDoubleRegZero, cond); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 860 | } |
| 861 | |
| 862 | |
| 863 | void MacroAssembler::VFPCompareAndSetFlags(const DwVfpRegister src1, |
| 864 | const DwVfpRegister src2, |
| 865 | const Condition cond) { |
| 866 | // Compare and move FPSCR flags to the normal condition flags. |
| 867 | VFPCompareAndLoadFlags(src1, src2, pc, cond); |
| 868 | } |
| 869 | |
| 870 | void MacroAssembler::VFPCompareAndSetFlags(const DwVfpRegister src1, |
| 871 | const double src2, |
| 872 | const Condition cond) { |
| 873 | // Compare and move FPSCR flags to the normal condition flags. |
| 874 | VFPCompareAndLoadFlags(src1, src2, pc, cond); |
| 875 | } |
| 876 | |
| 877 | |
| 878 | void MacroAssembler::VFPCompareAndLoadFlags(const DwVfpRegister src1, |
| 879 | const DwVfpRegister src2, |
| 880 | const Register fpscr_flags, |
| 881 | const Condition cond) { |
| 882 | // Compare and load FPSCR. |
| 883 | vcmp(src1, src2, cond); |
| 884 | vmrs(fpscr_flags, cond); |
| 885 | } |
| 886 | |
| 887 | void MacroAssembler::VFPCompareAndLoadFlags(const DwVfpRegister src1, |
| 888 | const double src2, |
| 889 | const Register fpscr_flags, |
| 890 | const Condition cond) { |
| 891 | // Compare and load FPSCR. |
| 892 | vcmp(src1, src2, cond); |
| 893 | vmrs(fpscr_flags, cond); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 894 | } |
| 895 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 896 | void MacroAssembler::Vmov(const DwVfpRegister dst, |
| 897 | const double imm, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 898 | const Register scratch) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 899 | static const DoubleRepresentation minus_zero(-0.0); |
| 900 | static const DoubleRepresentation zero(0.0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 901 | DoubleRepresentation value_rep(imm); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 902 | // Handle special values first. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 903 | if (value_rep == zero) { |
| 904 | vmov(dst, kDoubleRegZero); |
| 905 | } else if (value_rep == minus_zero) { |
| 906 | vneg(dst, kDoubleRegZero); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 907 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 908 | vmov(dst, imm, scratch); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 909 | } |
| 910 | } |
| 911 | |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 912 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 913 | void MacroAssembler::VmovHigh(Register dst, DwVfpRegister src) { |
| 914 | if (src.code() < 16) { |
| 915 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(src.code()); |
| 916 | vmov(dst, loc.high()); |
| 917 | } else { |
| 918 | vmov(dst, VmovIndexHi, src); |
| 919 | } |
| 920 | } |
| 921 | |
| 922 | |
| 923 | void MacroAssembler::VmovHigh(DwVfpRegister dst, Register src) { |
| 924 | if (dst.code() < 16) { |
| 925 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(dst.code()); |
| 926 | vmov(loc.high(), src); |
| 927 | } else { |
| 928 | vmov(dst, VmovIndexHi, src); |
| 929 | } |
| 930 | } |
| 931 | |
| 932 | |
| 933 | void MacroAssembler::VmovLow(Register dst, DwVfpRegister src) { |
| 934 | if (src.code() < 16) { |
| 935 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(src.code()); |
| 936 | vmov(dst, loc.low()); |
| 937 | } else { |
| 938 | vmov(dst, VmovIndexLo, src); |
| 939 | } |
| 940 | } |
| 941 | |
| 942 | |
| 943 | void MacroAssembler::VmovLow(DwVfpRegister dst, Register src) { |
| 944 | if (dst.code() < 16) { |
| 945 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(dst.code()); |
| 946 | vmov(loc.low(), src); |
| 947 | } else { |
| 948 | vmov(dst, VmovIndexLo, src); |
| 949 | } |
| 950 | } |
| 951 | |
| 952 | |
| 953 | void MacroAssembler::LoadConstantPoolPointerRegister() { |
| 954 | if (FLAG_enable_ool_constant_pool) { |
| 955 | int constant_pool_offset = Code::kConstantPoolOffset - Code::kHeaderSize - |
| 956 | pc_offset() - Instruction::kPCReadOffset; |
| 957 | DCHECK(ImmediateFitsAddrMode2Instruction(constant_pool_offset)); |
| 958 | ldr(pp, MemOperand(pc, constant_pool_offset)); |
| 959 | } |
| 960 | } |
| 961 | |
| 962 | |
| 963 | void MacroAssembler::StubPrologue() { |
| 964 | PushFixedFrame(); |
| 965 | Push(Smi::FromInt(StackFrame::STUB)); |
| 966 | // Adjust FP to point to saved FP. |
| 967 | add(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| 968 | if (FLAG_enable_ool_constant_pool) { |
| 969 | LoadConstantPoolPointerRegister(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 970 | set_ool_constant_pool_available(true); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 971 | } |
| 972 | } |
| 973 | |
| 974 | |
| 975 | void MacroAssembler::Prologue(bool code_pre_aging) { |
| 976 | { PredictableCodeSizeScope predictible_code_size_scope( |
| 977 | this, kNoCodeAgeSequenceLength); |
| 978 | // The following three instructions must remain together and unmodified |
| 979 | // for code aging to work properly. |
| 980 | if (code_pre_aging) { |
| 981 | // Pre-age the code. |
| 982 | Code* stub = Code::GetPreAgedCodeAgeStub(isolate()); |
| 983 | add(r0, pc, Operand(-8)); |
| 984 | ldr(pc, MemOperand(pc, -4)); |
| 985 | emit_code_stub_address(stub); |
| 986 | } else { |
| 987 | PushFixedFrame(r1); |
| 988 | nop(ip.code()); |
| 989 | // Adjust FP to point to saved FP. |
| 990 | add(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| 991 | } |
| 992 | } |
| 993 | if (FLAG_enable_ool_constant_pool) { |
| 994 | LoadConstantPoolPointerRegister(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 995 | set_ool_constant_pool_available(true); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 996 | } |
| 997 | } |
| 998 | |
| 999 | |
| 1000 | void MacroAssembler::EnterFrame(StackFrame::Type type, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 1001 | bool load_constant_pool_pointer_reg) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1002 | // r0-r3: preserved |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1003 | PushFixedFrame(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 1004 | if (FLAG_enable_ool_constant_pool && load_constant_pool_pointer_reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1005 | LoadConstantPoolPointerRegister(); |
| 1006 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1007 | mov(ip, Operand(Smi::FromInt(type))); |
| 1008 | push(ip); |
| 1009 | mov(ip, Operand(CodeObject())); |
| 1010 | push(ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1011 | // Adjust FP to point to saved FP. |
| 1012 | add(fp, sp, |
| 1013 | Operand(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1014 | } |
| 1015 | |
| 1016 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1017 | int MacroAssembler::LeaveFrame(StackFrame::Type type) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1018 | // r0: preserved |
| 1019 | // r1: preserved |
| 1020 | // r2: preserved |
| 1021 | |
| 1022 | // Drop the execution stack down to the frame pointer and restore |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1023 | // the caller frame pointer, return address and constant pool pointer |
| 1024 | // (if FLAG_enable_ool_constant_pool). |
| 1025 | int frame_ends; |
| 1026 | if (FLAG_enable_ool_constant_pool) { |
| 1027 | add(sp, fp, Operand(StandardFrameConstants::kConstantPoolOffset)); |
| 1028 | frame_ends = pc_offset(); |
| 1029 | ldm(ia_w, sp, pp.bit() | fp.bit() | lr.bit()); |
| 1030 | } else { |
| 1031 | mov(sp, fp); |
| 1032 | frame_ends = pc_offset(); |
| 1033 | ldm(ia_w, sp, fp.bit() | lr.bit()); |
| 1034 | } |
| 1035 | return frame_ends; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1036 | } |
| 1037 | |
| 1038 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1039 | void MacroAssembler::EnterExitFrame(bool save_doubles, int stack_space) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1040 | // Set up the frame structure on the stack. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1041 | DCHECK_EQ(2 * kPointerSize, ExitFrameConstants::kCallerSPDisplacement); |
| 1042 | DCHECK_EQ(1 * kPointerSize, ExitFrameConstants::kCallerPCOffset); |
| 1043 | DCHECK_EQ(0 * kPointerSize, ExitFrameConstants::kCallerFPOffset); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1044 | Push(lr, fp); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1045 | mov(fp, Operand(sp)); // Set up new frame pointer. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1046 | // Reserve room for saved entry sp and code object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1047 | sub(sp, sp, Operand(ExitFrameConstants::kFrameSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1048 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1049 | mov(ip, Operand::Zero()); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1050 | str(ip, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
| 1051 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1052 | if (FLAG_enable_ool_constant_pool) { |
| 1053 | str(pp, MemOperand(fp, ExitFrameConstants::kConstantPoolOffset)); |
| 1054 | } |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1055 | mov(ip, Operand(CodeObject())); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1056 | str(ip, MemOperand(fp, ExitFrameConstants::kCodeOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1057 | |
| 1058 | // Save the frame pointer and the context in top. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1059 | mov(ip, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1060 | str(fp, MemOperand(ip)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1061 | mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1062 | str(cp, MemOperand(ip)); |
| 1063 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1064 | // Optionally save all double registers. |
| 1065 | if (save_doubles) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1066 | SaveFPRegs(sp, ip); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1067 | // Note that d0 will be accessible at |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1068 | // fp - ExitFrameConstants::kFrameSize - |
| 1069 | // DwVfpRegister::kMaxNumRegisters * kDoubleSize, |
| 1070 | // since the sp slot, code slot and constant pool slot (if |
| 1071 | // FLAG_enable_ool_constant_pool) were pushed after the fp. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1072 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1073 | |
| 1074 | // Reserve place for the return address and stack space and align the frame |
| 1075 | // preparing for calling the runtime function. |
| 1076 | const int frame_alignment = MacroAssembler::ActivationFrameAlignment(); |
| 1077 | sub(sp, sp, Operand((stack_space + 1) * kPointerSize)); |
| 1078 | if (frame_alignment > 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1079 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1080 | and_(sp, sp, Operand(-frame_alignment)); |
| 1081 | } |
| 1082 | |
| 1083 | // Set the exit frame sp value to point just before the return address |
| 1084 | // location. |
| 1085 | add(ip, sp, Operand(kPointerSize)); |
| 1086 | str(ip, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1087 | } |
| 1088 | |
| 1089 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1090 | void MacroAssembler::InitializeNewString(Register string, |
| 1091 | Register length, |
| 1092 | Heap::RootListIndex map_index, |
| 1093 | Register scratch1, |
| 1094 | Register scratch2) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1095 | SmiTag(scratch1, length); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1096 | LoadRoot(scratch2, map_index); |
| 1097 | str(scratch1, FieldMemOperand(string, String::kLengthOffset)); |
| 1098 | mov(scratch1, Operand(String::kEmptyHashField)); |
| 1099 | str(scratch2, FieldMemOperand(string, HeapObject::kMapOffset)); |
| 1100 | str(scratch1, FieldMemOperand(string, String::kHashFieldOffset)); |
| 1101 | } |
| 1102 | |
| 1103 | |
| 1104 | int MacroAssembler::ActivationFrameAlignment() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1105 | #if V8_HOST_ARCH_ARM |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1106 | // Running on the real platform. Use the alignment as mandated by the local |
| 1107 | // environment. |
| 1108 | // Note: This will break if we ever start generating snapshots on one ARM |
| 1109 | // platform for another ARM platform with a different alignment. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1110 | return base::OS::ActivationFrameAlignment(); |
| 1111 | #else // V8_HOST_ARCH_ARM |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1112 | // If we are using the simulator then we should always align to the expected |
| 1113 | // alignment. As the simulator is used to generate snapshots we do not know |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1114 | // if the target platform will need alignment, so this is controlled from a |
| 1115 | // flag. |
| 1116 | return FLAG_sim_stack_alignment; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1117 | #endif // V8_HOST_ARCH_ARM |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1118 | } |
| 1119 | |
| 1120 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1121 | void MacroAssembler::LeaveExitFrame(bool save_doubles, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1122 | Register argument_count, |
| 1123 | bool restore_context) { |
| 1124 | ConstantPoolUnavailableScope constant_pool_unavailable(this); |
| 1125 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1126 | // Optionally restore all double registers. |
| 1127 | if (save_doubles) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1128 | // Calculate the stack location of the saved doubles and restore them. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1129 | const int offset = ExitFrameConstants::kFrameSize; |
| 1130 | sub(r3, fp, |
| 1131 | Operand(offset + DwVfpRegister::kMaxNumRegisters * kDoubleSize)); |
| 1132 | RestoreFPRegs(r3, ip); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1133 | } |
| 1134 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1135 | // Clear top frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1136 | mov(r3, Operand::Zero()); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1137 | mov(ip, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1138 | str(r3, MemOperand(ip)); |
| 1139 | |
| 1140 | // Restore current context from top and clear it in debug mode. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1141 | if (restore_context) { |
| 1142 | mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
| 1143 | ldr(cp, MemOperand(ip)); |
| 1144 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1145 | #ifdef DEBUG |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1146 | mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1147 | str(r3, MemOperand(ip)); |
| 1148 | #endif |
| 1149 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1150 | // Tear down the exit frame, pop the arguments, and return. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1151 | if (FLAG_enable_ool_constant_pool) { |
| 1152 | ldr(pp, MemOperand(fp, ExitFrameConstants::kConstantPoolOffset)); |
| 1153 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1154 | mov(sp, Operand(fp)); |
| 1155 | ldm(ia_w, sp, fp.bit() | lr.bit()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1156 | if (argument_count.is_valid()) { |
| 1157 | add(sp, sp, Operand(argument_count, LSL, kPointerSizeLog2)); |
| 1158 | } |
| 1159 | } |
| 1160 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1161 | |
| 1162 | void MacroAssembler::MovFromFloatResult(const DwVfpRegister dst) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1163 | if (use_eabi_hardfloat()) { |
| 1164 | Move(dst, d0); |
| 1165 | } else { |
| 1166 | vmov(dst, r0, r1); |
| 1167 | } |
| 1168 | } |
| 1169 | |
| 1170 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1171 | // On ARM this is just a synonym to make the purpose clear. |
| 1172 | void MacroAssembler::MovFromFloatParameter(DwVfpRegister dst) { |
| 1173 | MovFromFloatResult(dst); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1174 | } |
| 1175 | |
| 1176 | |
| 1177 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 1178 | const ParameterCount& actual, |
| 1179 | Handle<Code> code_constant, |
| 1180 | Register code_reg, |
| 1181 | Label* done, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1182 | bool* definitely_mismatches, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1183 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1184 | const CallWrapper& call_wrapper) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1185 | bool definitely_matches = false; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1186 | *definitely_mismatches = false; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1187 | Label regular_invoke; |
| 1188 | |
| 1189 | // Check whether the expected and actual arguments count match. If not, |
| 1190 | // setup registers according to contract with ArgumentsAdaptorTrampoline: |
| 1191 | // r0: actual arguments count |
| 1192 | // r1: function (passed through to callee) |
| 1193 | // r2: expected arguments count |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1194 | |
| 1195 | // The code below is made a lot easier because the calling code already sets |
| 1196 | // up actual and expected registers according to the contract if values are |
| 1197 | // passed in registers. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1198 | DCHECK(actual.is_immediate() || actual.reg().is(r0)); |
| 1199 | DCHECK(expected.is_immediate() || expected.reg().is(r2)); |
| 1200 | DCHECK((!code_constant.is_null() && code_reg.is(no_reg)) || code_reg.is(r3)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1201 | |
| 1202 | if (expected.is_immediate()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1203 | DCHECK(actual.is_immediate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1204 | if (expected.immediate() == actual.immediate()) { |
| 1205 | definitely_matches = true; |
| 1206 | } else { |
| 1207 | mov(r0, Operand(actual.immediate())); |
| 1208 | const int sentinel = SharedFunctionInfo::kDontAdaptArgumentsSentinel; |
| 1209 | if (expected.immediate() == sentinel) { |
| 1210 | // Don't worry about adapting arguments for builtins that |
| 1211 | // don't want that done. Skip adaption code by making it look |
| 1212 | // like we have a match between expected and actual number of |
| 1213 | // arguments. |
| 1214 | definitely_matches = true; |
| 1215 | } else { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1216 | *definitely_mismatches = true; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1217 | mov(r2, Operand(expected.immediate())); |
| 1218 | } |
| 1219 | } |
| 1220 | } else { |
| 1221 | if (actual.is_immediate()) { |
| 1222 | cmp(expected.reg(), Operand(actual.immediate())); |
| 1223 | b(eq, ®ular_invoke); |
| 1224 | mov(r0, Operand(actual.immediate())); |
| 1225 | } else { |
| 1226 | cmp(expected.reg(), Operand(actual.reg())); |
| 1227 | b(eq, ®ular_invoke); |
| 1228 | } |
| 1229 | } |
| 1230 | |
| 1231 | if (!definitely_matches) { |
| 1232 | if (!code_constant.is_null()) { |
| 1233 | mov(r3, Operand(code_constant)); |
| 1234 | add(r3, r3, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 1235 | } |
| 1236 | |
| 1237 | Handle<Code> adaptor = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1238 | isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1239 | if (flag == CALL_FUNCTION) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1240 | call_wrapper.BeforeCall(CallSize(adaptor)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1241 | Call(adaptor); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1242 | call_wrapper.AfterCall(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1243 | if (!*definitely_mismatches) { |
| 1244 | b(done); |
| 1245 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1246 | } else { |
| 1247 | Jump(adaptor, RelocInfo::CODE_TARGET); |
| 1248 | } |
| 1249 | bind(®ular_invoke); |
| 1250 | } |
| 1251 | } |
| 1252 | |
| 1253 | |
| 1254 | void MacroAssembler::InvokeCode(Register code, |
| 1255 | const ParameterCount& expected, |
| 1256 | const ParameterCount& actual, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1257 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1258 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1259 | // You can't call a function without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1260 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1261 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1262 | Label done; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1263 | bool definitely_mismatches = false; |
| 1264 | InvokePrologue(expected, actual, Handle<Code>::null(), code, |
| 1265 | &done, &definitely_mismatches, flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1266 | call_wrapper); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1267 | if (!definitely_mismatches) { |
| 1268 | if (flag == CALL_FUNCTION) { |
| 1269 | call_wrapper.BeforeCall(CallSize(code)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1270 | Call(code); |
| 1271 | call_wrapper.AfterCall(); |
| 1272 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1273 | DCHECK(flag == JUMP_FUNCTION); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1274 | Jump(code); |
| 1275 | } |
Ben Murdoch | 85b7179 | 2012-04-11 18:30:58 +0100 | [diff] [blame] | 1276 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1277 | // Continue here if InvokePrologue does handle the invocation due to |
| 1278 | // mismatched parameter counts. |
| 1279 | bind(&done); |
| 1280 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1281 | } |
| 1282 | |
| 1283 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1284 | void MacroAssembler::InvokeFunction(Register fun, |
| 1285 | const ParameterCount& actual, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1286 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1287 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1288 | // You can't call a function without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1289 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1290 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1291 | // Contract with called JS functions requires that function is passed in r1. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1292 | DCHECK(fun.is(r1)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1293 | |
| 1294 | Register expected_reg = r2; |
| 1295 | Register code_reg = r3; |
| 1296 | |
| 1297 | ldr(code_reg, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 1298 | ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 1299 | ldr(expected_reg, |
| 1300 | FieldMemOperand(code_reg, |
| 1301 | SharedFunctionInfo::kFormalParameterCountOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1302 | SmiUntag(expected_reg); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1303 | ldr(code_reg, |
Steve Block | 791712a | 2010-08-27 10:21:07 +0100 | [diff] [blame] | 1304 | FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1305 | |
| 1306 | ParameterCount expected(expected_reg); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1307 | InvokeCode(code_reg, expected, actual, flag, call_wrapper); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1308 | } |
| 1309 | |
| 1310 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1311 | void MacroAssembler::InvokeFunction(Register function, |
| 1312 | const ParameterCount& expected, |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1313 | const ParameterCount& actual, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1314 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1315 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1316 | // You can't call a function without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1317 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
| 1318 | |
| 1319 | // Contract with called JS functions requires that function is passed in r1. |
| 1320 | DCHECK(function.is(r1)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1321 | |
| 1322 | // Get the function and setup the context. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1323 | ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 1324 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1325 | // We call indirectly through the code field in the function to |
| 1326 | // allow recompilation to take effect without changing any of the |
| 1327 | // call sites. |
| 1328 | ldr(r3, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1329 | InvokeCode(r3, expected, actual, flag, call_wrapper); |
| 1330 | } |
| 1331 | |
| 1332 | |
| 1333 | void MacroAssembler::InvokeFunction(Handle<JSFunction> function, |
| 1334 | const ParameterCount& expected, |
| 1335 | const ParameterCount& actual, |
| 1336 | InvokeFlag flag, |
| 1337 | const CallWrapper& call_wrapper) { |
| 1338 | Move(r1, function); |
| 1339 | InvokeFunction(r1, expected, actual, flag, call_wrapper); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1340 | } |
| 1341 | |
| 1342 | |
| 1343 | void MacroAssembler::IsObjectJSObjectType(Register heap_object, |
| 1344 | Register map, |
| 1345 | Register scratch, |
| 1346 | Label* fail) { |
| 1347 | ldr(map, FieldMemOperand(heap_object, HeapObject::kMapOffset)); |
| 1348 | IsInstanceJSObjectType(map, scratch, fail); |
| 1349 | } |
| 1350 | |
| 1351 | |
| 1352 | void MacroAssembler::IsInstanceJSObjectType(Register map, |
| 1353 | Register scratch, |
| 1354 | Label* fail) { |
| 1355 | ldrb(scratch, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1356 | cmp(scratch, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1357 | b(lt, fail); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1358 | cmp(scratch, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1359 | b(gt, fail); |
| 1360 | } |
| 1361 | |
| 1362 | |
| 1363 | void MacroAssembler::IsObjectJSStringType(Register object, |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1364 | Register scratch, |
| 1365 | Label* fail) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1366 | DCHECK(kNotStringTag != 0); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1367 | |
| 1368 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 1369 | ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| 1370 | tst(scratch, Operand(kIsNotStringMask)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1371 | b(ne, fail); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1372 | } |
| 1373 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1374 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1375 | void MacroAssembler::IsObjectNameType(Register object, |
| 1376 | Register scratch, |
| 1377 | Label* fail) { |
| 1378 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 1379 | ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| 1380 | cmp(scratch, Operand(LAST_NAME_TYPE)); |
| 1381 | b(hi, fail); |
| 1382 | } |
| 1383 | |
| 1384 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1385 | void MacroAssembler::DebugBreak() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1386 | mov(r0, Operand::Zero()); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1387 | mov(r1, Operand(ExternalReference(Runtime::kDebugBreak, isolate()))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1388 | CEntryStub ces(isolate(), 1); |
| 1389 | DCHECK(AllowThisStubCall(&ces)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1390 | Call(ces.GetCode(), RelocInfo::DEBUG_BREAK); |
| 1391 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1392 | |
| 1393 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1394 | void MacroAssembler::PushTryHandler(StackHandler::Kind kind, |
| 1395 | int handler_index) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1396 | // Adjust this code if not the case. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1397 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
| 1398 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1399 | STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| 1400 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| 1401 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| 1402 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1403 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1404 | // For the JSEntry handler, we must preserve r0-r4, r5-r6 are available. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1405 | // We will build up the handler from the bottom by pushing on the stack. |
| 1406 | // Set up the code object (r5) and the state (r6) for pushing. |
| 1407 | unsigned state = |
| 1408 | StackHandler::IndexField::encode(handler_index) | |
| 1409 | StackHandler::KindField::encode(kind); |
| 1410 | mov(r5, Operand(CodeObject())); |
| 1411 | mov(r6, Operand(state)); |
| 1412 | |
| 1413 | // Push the frame pointer, context, state, and code object. |
| 1414 | if (kind == StackHandler::JS_ENTRY) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1415 | mov(cp, Operand(Smi::FromInt(0))); // Indicates no context. |
| 1416 | mov(ip, Operand::Zero()); // NULL frame pointer. |
| 1417 | stm(db_w, sp, r5.bit() | r6.bit() | cp.bit() | ip.bit()); |
Ben Murdoch | 5d4cdbf | 2012-04-11 10:23:59 +0100 | [diff] [blame] | 1418 | } else { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1419 | stm(db_w, sp, r5.bit() | r6.bit() | cp.bit() | fp.bit()); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 1420 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1421 | |
| 1422 | // Link the current handler as the next handler. |
| 1423 | mov(r6, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| 1424 | ldr(r5, MemOperand(r6)); |
| 1425 | push(r5); |
| 1426 | // Set this new handler as the current one. |
| 1427 | str(sp, MemOperand(r6)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1428 | } |
| 1429 | |
| 1430 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1431 | void MacroAssembler::PopTryHandler() { |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1432 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1433 | pop(r1); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1434 | mov(ip, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1435 | add(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize)); |
| 1436 | str(r1, MemOperand(ip)); |
| 1437 | } |
| 1438 | |
| 1439 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1440 | void MacroAssembler::JumpToHandlerEntry() { |
| 1441 | // Compute the handler entry address and jump to it. The handler table is |
| 1442 | // a fixed array of (smi-tagged) code offsets. |
| 1443 | // r0 = exception, r1 = code object, r2 = state. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1444 | |
| 1445 | ConstantPoolUnavailableScope constant_pool_unavailable(this); |
| 1446 | if (FLAG_enable_ool_constant_pool) { |
| 1447 | ldr(pp, FieldMemOperand(r1, Code::kConstantPoolOffset)); // Constant pool. |
| 1448 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1449 | ldr(r3, FieldMemOperand(r1, Code::kHandlerTableOffset)); // Handler table. |
| 1450 | add(r3, r3, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 1451 | mov(r2, Operand(r2, LSR, StackHandler::kKindWidth)); // Handler index. |
| 1452 | ldr(r2, MemOperand(r3, r2, LSL, kPointerSizeLog2)); // Smi-tagged offset. |
| 1453 | add(r1, r1, Operand(Code::kHeaderSize - kHeapObjectTag)); // Code start. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1454 | add(pc, r1, Operand::SmiUntag(r2)); // Jump |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1455 | } |
| 1456 | |
| 1457 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1458 | void MacroAssembler::Throw(Register value) { |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1459 | // Adjust this code if not the case. |
| 1460 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1461 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 1462 | STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| 1463 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| 1464 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| 1465 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
| 1466 | |
| 1467 | // The exception is expected in r0. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1468 | if (!value.is(r0)) { |
| 1469 | mov(r0, value); |
| 1470 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1471 | // Drop the stack pointer to the top of the top handler. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1472 | mov(r3, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1473 | ldr(sp, MemOperand(r3)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1474 | // Restore the next handler. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1475 | pop(r2); |
| 1476 | str(r2, MemOperand(r3)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1477 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1478 | // Get the code object (r1) and state (r2). Restore the context and frame |
| 1479 | // pointer. |
| 1480 | ldm(ia_w, sp, r1.bit() | r2.bit() | cp.bit() | fp.bit()); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1481 | |
| 1482 | // If the handler is a JS frame, restore the context to the frame. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1483 | // (kind == ENTRY) == (fp == 0) == (cp == 0), so we could test either fp |
| 1484 | // or cp. |
| 1485 | tst(cp, cp); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1486 | str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne); |
| 1487 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1488 | JumpToHandlerEntry(); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1489 | } |
| 1490 | |
| 1491 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1492 | void MacroAssembler::ThrowUncatchable(Register value) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1493 | // Adjust this code if not the case. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1494 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
| 1495 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1496 | STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| 1497 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| 1498 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| 1499 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
| 1500 | |
| 1501 | // The exception is expected in r0. |
Ben Murdoch | 5d4cdbf | 2012-04-11 10:23:59 +0100 | [diff] [blame] | 1502 | if (!value.is(r0)) { |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 1503 | mov(r0, value); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1504 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1505 | // Drop the stack pointer to the top of the top stack handler. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 1506 | mov(r3, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| 1507 | ldr(sp, MemOperand(r3)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1508 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 1509 | // Unwind the handlers until the ENTRY handler is found. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1510 | Label fetch_next, check_kind; |
| 1511 | jmp(&check_kind); |
| 1512 | bind(&fetch_next); |
| 1513 | ldr(sp, MemOperand(sp, StackHandlerConstants::kNextOffset)); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 1514 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1515 | bind(&check_kind); |
| 1516 | STATIC_ASSERT(StackHandler::JS_ENTRY == 0); |
| 1517 | ldr(r2, MemOperand(sp, StackHandlerConstants::kStateOffset)); |
| 1518 | tst(r2, Operand(StackHandler::KindField::kMask)); |
| 1519 | b(ne, &fetch_next); |
| 1520 | |
| 1521 | // Set the top handler address to next handler past the top ENTRY handler. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 1522 | pop(r2); |
| 1523 | str(r2, MemOperand(r3)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1524 | // Get the code object (r1) and state (r2). Clear the context and frame |
| 1525 | // pointer (0 was saved in the handler). |
| 1526 | ldm(ia_w, sp, r1.bit() | r2.bit() | cp.bit() | fp.bit()); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 1527 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1528 | JumpToHandlerEntry(); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1529 | } |
| 1530 | |
| 1531 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1532 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 1533 | Register scratch, |
| 1534 | Label* miss) { |
| 1535 | Label same_contexts; |
| 1536 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1537 | DCHECK(!holder_reg.is(scratch)); |
| 1538 | DCHECK(!holder_reg.is(ip)); |
| 1539 | DCHECK(!scratch.is(ip)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1540 | |
| 1541 | // Load current lexical context from the stack frame. |
| 1542 | ldr(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 1543 | // In debug mode, make sure the lexical context is set. |
| 1544 | #ifdef DEBUG |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1545 | cmp(scratch, Operand::Zero()); |
| 1546 | Check(ne, kWeShouldNotHaveAnEmptyLexicalContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1547 | #endif |
| 1548 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1549 | // Load the native context of the current context. |
| 1550 | int offset = |
| 1551 | Context::kHeaderSize + Context::GLOBAL_OBJECT_INDEX * kPointerSize; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1552 | ldr(scratch, FieldMemOperand(scratch, offset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1553 | ldr(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1554 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1555 | // Check the context is a native context. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1556 | if (emit_debug_code()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1557 | // Cannot use ip as a temporary in this verification code. Due to the fact |
| 1558 | // that ip is clobbered as part of cmp with an object Operand. |
| 1559 | push(holder_reg); // Temporarily save holder on the stack. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1560 | // Read the first word and compare to the native_context_map. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1561 | ldr(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1562 | LoadRoot(ip, Heap::kNativeContextMapRootIndex); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1563 | cmp(holder_reg, ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1564 | Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1565 | pop(holder_reg); // Restore holder. |
| 1566 | } |
| 1567 | |
| 1568 | // Check if both contexts are the same. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1569 | ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1570 | cmp(scratch, Operand(ip)); |
| 1571 | b(eq, &same_contexts); |
| 1572 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1573 | // Check the context is a native context. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1574 | if (emit_debug_code()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1575 | // Cannot use ip as a temporary in this verification code. Due to the fact |
| 1576 | // that ip is clobbered as part of cmp with an object Operand. |
| 1577 | push(holder_reg); // Temporarily save holder on the stack. |
| 1578 | mov(holder_reg, ip); // Move ip to its holding place. |
| 1579 | LoadRoot(ip, Heap::kNullValueRootIndex); |
| 1580 | cmp(holder_reg, ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1581 | Check(ne, kJSGlobalProxyContextShouldNotBeNull); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1582 | |
| 1583 | ldr(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1584 | LoadRoot(ip, Heap::kNativeContextMapRootIndex); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1585 | cmp(holder_reg, ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1586 | Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1587 | // Restore ip is not needed. ip is reloaded below. |
| 1588 | pop(holder_reg); // Restore holder. |
| 1589 | // Restore ip to holder's context. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1590 | ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1591 | } |
| 1592 | |
| 1593 | // Check that the security token in the calling global object is |
| 1594 | // compatible with the security token in the receiving global |
| 1595 | // object. |
| 1596 | int token_offset = Context::kHeaderSize + |
| 1597 | Context::SECURITY_TOKEN_INDEX * kPointerSize; |
| 1598 | |
| 1599 | ldr(scratch, FieldMemOperand(scratch, token_offset)); |
| 1600 | ldr(ip, FieldMemOperand(ip, token_offset)); |
| 1601 | cmp(scratch, Operand(ip)); |
| 1602 | b(ne, miss); |
| 1603 | |
| 1604 | bind(&same_contexts); |
| 1605 | } |
| 1606 | |
| 1607 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1608 | // Compute the hash code from the untagged key. This must be kept in sync with |
| 1609 | // ComputeIntegerHash in utils.h and KeyedLoadGenericStub in |
| 1610 | // code-stub-hydrogen.cc |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1611 | void MacroAssembler::GetNumberHash(Register t0, Register scratch) { |
| 1612 | // First of all we assign the hash seed to scratch. |
| 1613 | LoadRoot(scratch, Heap::kHashSeedRootIndex); |
| 1614 | SmiUntag(scratch); |
| 1615 | |
| 1616 | // Xor original key with a seed. |
| 1617 | eor(t0, t0, Operand(scratch)); |
| 1618 | |
| 1619 | // Compute the hash code from the untagged key. This must be kept in sync |
| 1620 | // with ComputeIntegerHash in utils.h. |
| 1621 | // |
| 1622 | // hash = ~hash + (hash << 15); |
| 1623 | mvn(scratch, Operand(t0)); |
| 1624 | add(t0, scratch, Operand(t0, LSL, 15)); |
| 1625 | // hash = hash ^ (hash >> 12); |
| 1626 | eor(t0, t0, Operand(t0, LSR, 12)); |
| 1627 | // hash = hash + (hash << 2); |
| 1628 | add(t0, t0, Operand(t0, LSL, 2)); |
| 1629 | // hash = hash ^ (hash >> 4); |
| 1630 | eor(t0, t0, Operand(t0, LSR, 4)); |
| 1631 | // hash = hash * 2057; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1632 | mov(scratch, Operand(t0, LSL, 11)); |
| 1633 | add(t0, t0, Operand(t0, LSL, 3)); |
| 1634 | add(t0, t0, scratch); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1635 | // hash = hash ^ (hash >> 16); |
| 1636 | eor(t0, t0, Operand(t0, LSR, 16)); |
| 1637 | } |
| 1638 | |
| 1639 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1640 | void MacroAssembler::LoadFromNumberDictionary(Label* miss, |
| 1641 | Register elements, |
| 1642 | Register key, |
| 1643 | Register result, |
| 1644 | Register t0, |
| 1645 | Register t1, |
| 1646 | Register t2) { |
| 1647 | // Register use: |
| 1648 | // |
| 1649 | // elements - holds the slow-case elements of the receiver on entry. |
| 1650 | // Unchanged unless 'result' is the same register. |
| 1651 | // |
| 1652 | // key - holds the smi key on entry. |
| 1653 | // Unchanged unless 'result' is the same register. |
| 1654 | // |
| 1655 | // result - holds the result on exit if the load succeeded. |
| 1656 | // Allowed to be the same as 'key' or 'result'. |
| 1657 | // Unchanged on bailout so 'key' or 'result' can be used |
| 1658 | // in further computation. |
| 1659 | // |
| 1660 | // Scratch registers: |
| 1661 | // |
| 1662 | // t0 - holds the untagged key on entry and holds the hash once computed. |
| 1663 | // |
| 1664 | // t1 - used to hold the capacity mask of the dictionary |
| 1665 | // |
| 1666 | // t2 - used for the index into the dictionary. |
| 1667 | Label done; |
| 1668 | |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1669 | GetNumberHash(t0, t1); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1670 | |
| 1671 | // Compute the capacity mask. |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1672 | ldr(t1, FieldMemOperand(elements, SeededNumberDictionary::kCapacityOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1673 | SmiUntag(t1); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1674 | sub(t1, t1, Operand(1)); |
| 1675 | |
| 1676 | // Generate an unrolled loop that performs a few probes before giving up. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1677 | for (int i = 0; i < kNumberDictionaryProbes; i++) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1678 | // Use t2 for index calculations and keep the hash intact in t0. |
| 1679 | mov(t2, t0); |
| 1680 | // Compute the masked index: (hash + i + i * i) & mask. |
| 1681 | if (i > 0) { |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1682 | add(t2, t2, Operand(SeededNumberDictionary::GetProbeOffset(i))); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1683 | } |
| 1684 | and_(t2, t2, Operand(t1)); |
| 1685 | |
| 1686 | // Scale the index by multiplying by the element size. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1687 | DCHECK(SeededNumberDictionary::kEntrySize == 3); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1688 | add(t2, t2, Operand(t2, LSL, 1)); // t2 = t2 * 3 |
| 1689 | |
| 1690 | // Check if the key is identical to the name. |
| 1691 | add(t2, elements, Operand(t2, LSL, kPointerSizeLog2)); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1692 | ldr(ip, FieldMemOperand(t2, SeededNumberDictionary::kElementsStartOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1693 | cmp(key, Operand(ip)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1694 | if (i != kNumberDictionaryProbes - 1) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1695 | b(eq, &done); |
| 1696 | } else { |
| 1697 | b(ne, miss); |
| 1698 | } |
| 1699 | } |
| 1700 | |
| 1701 | bind(&done); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 1702 | // Check that the value is a field property. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1703 | // t2: elements + (index * kPointerSize) |
| 1704 | const int kDetailsOffset = |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1705 | SeededNumberDictionary::kElementsStartOffset + 2 * kPointerSize; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1706 | ldr(t1, FieldMemOperand(t2, kDetailsOffset)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 1707 | DCHECK_EQ(FIELD, 0); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1708 | tst(t1, Operand(Smi::FromInt(PropertyDetails::TypeField::kMask))); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1709 | b(ne, miss); |
| 1710 | |
| 1711 | // Get the value at the masked, scaled index and return. |
| 1712 | const int kValueOffset = |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1713 | SeededNumberDictionary::kElementsStartOffset + kPointerSize; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1714 | ldr(result, FieldMemOperand(t2, kValueOffset)); |
| 1715 | } |
| 1716 | |
| 1717 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1718 | void MacroAssembler::Allocate(int object_size, |
| 1719 | Register result, |
| 1720 | Register scratch1, |
| 1721 | Register scratch2, |
| 1722 | Label* gc_required, |
| 1723 | AllocationFlags flags) { |
| 1724 | DCHECK(object_size <= Page::kMaxRegularHeapObjectSize); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1725 | if (!FLAG_inline_new) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1726 | if (emit_debug_code()) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1727 | // Trash the registers to simulate an allocation failure. |
| 1728 | mov(result, Operand(0x7091)); |
| 1729 | mov(scratch1, Operand(0x7191)); |
| 1730 | mov(scratch2, Operand(0x7291)); |
| 1731 | } |
| 1732 | jmp(gc_required); |
| 1733 | return; |
| 1734 | } |
| 1735 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1736 | DCHECK(!result.is(scratch1)); |
| 1737 | DCHECK(!result.is(scratch2)); |
| 1738 | DCHECK(!scratch1.is(scratch2)); |
| 1739 | DCHECK(!scratch1.is(ip)); |
| 1740 | DCHECK(!scratch2.is(ip)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1741 | |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1742 | // Make object size into bytes. |
| 1743 | if ((flags & SIZE_IN_WORDS) != 0) { |
| 1744 | object_size *= kPointerSize; |
| 1745 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1746 | DCHECK_EQ(0, object_size & kObjectAlignmentMask); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1747 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1748 | // Check relative positions of allocation top and limit addresses. |
| 1749 | // The values must be adjacent in memory to allow the use of LDM. |
| 1750 | // Also, assert that the registers are numbered such that the values |
| 1751 | // are loaded in the correct order. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1752 | ExternalReference allocation_top = |
| 1753 | AllocationUtils::GetAllocationTopReference(isolate(), flags); |
| 1754 | ExternalReference allocation_limit = |
| 1755 | AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1756 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1757 | intptr_t top = |
| 1758 | reinterpret_cast<intptr_t>(allocation_top.address()); |
| 1759 | intptr_t limit = |
| 1760 | reinterpret_cast<intptr_t>(allocation_limit.address()); |
| 1761 | DCHECK((limit - top) == kPointerSize); |
| 1762 | DCHECK(result.code() < ip.code()); |
| 1763 | |
| 1764 | // Set up allocation top address register. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1765 | Register topaddr = scratch1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1766 | mov(topaddr, Operand(allocation_top)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1767 | |
| 1768 | // This code stores a temporary value in ip. This is OK, as the code below |
| 1769 | // does not need ip for implicit literal generation. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1770 | if ((flags & RESULT_CONTAINS_TOP) == 0) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1771 | // Load allocation top into result and allocation limit into ip. |
| 1772 | ldm(ia, topaddr, result.bit() | ip.bit()); |
| 1773 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1774 | if (emit_debug_code()) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1775 | // Assert that result actually contains top on entry. ip is used |
| 1776 | // immediately below so this use of ip does not cause difference with |
| 1777 | // respect to register content between debug and release mode. |
| 1778 | ldr(ip, MemOperand(topaddr)); |
| 1779 | cmp(result, ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1780 | Check(eq, kUnexpectedAllocationTop); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1781 | } |
| 1782 | // Load allocation limit into ip. Result already contains allocation top. |
| 1783 | ldr(ip, MemOperand(topaddr, limit - top)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1784 | } |
| 1785 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1786 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| 1787 | // Align the next allocation. Storing the filler map without checking top is |
| 1788 | // safe in new-space because the limit of the heap is aligned there. |
| 1789 | DCHECK((flags & PRETENURE_OLD_POINTER_SPACE) == 0); |
| 1790 | STATIC_ASSERT(kPointerAlignment * 2 == kDoubleAlignment); |
| 1791 | and_(scratch2, result, Operand(kDoubleAlignmentMask), SetCC); |
| 1792 | Label aligned; |
| 1793 | b(eq, &aligned); |
| 1794 | if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) { |
| 1795 | cmp(result, Operand(ip)); |
| 1796 | b(hs, gc_required); |
| 1797 | } |
| 1798 | mov(scratch2, Operand(isolate()->factory()->one_pointer_filler_map())); |
| 1799 | str(scratch2, MemOperand(result, kDoubleSize / 2, PostIndex)); |
| 1800 | bind(&aligned); |
| 1801 | } |
| 1802 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1803 | // Calculate new top and bail out if new space is exhausted. Use result |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1804 | // to calculate the new top. We must preserve the ip register at this |
| 1805 | // point, so we cannot just use add(). |
| 1806 | DCHECK(object_size > 0); |
| 1807 | Register source = result; |
| 1808 | Condition cond = al; |
| 1809 | int shift = 0; |
| 1810 | while (object_size != 0) { |
| 1811 | if (((object_size >> shift) & 0x03) == 0) { |
| 1812 | shift += 2; |
| 1813 | } else { |
| 1814 | int bits = object_size & (0xff << shift); |
| 1815 | object_size -= bits; |
| 1816 | shift += 8; |
| 1817 | Operand bits_operand(bits); |
| 1818 | DCHECK(bits_operand.instructions_required(this) == 1); |
| 1819 | add(scratch2, source, bits_operand, SetCC, cond); |
| 1820 | source = scratch2; |
| 1821 | cond = cc; |
| 1822 | } |
| 1823 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1824 | b(cs, gc_required); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1825 | cmp(scratch2, Operand(ip)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1826 | b(hi, gc_required); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1827 | str(scratch2, MemOperand(topaddr)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1828 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1829 | // Tag object if requested. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1830 | if ((flags & TAG_OBJECT) != 0) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1831 | add(result, result, Operand(kHeapObjectTag)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1832 | } |
| 1833 | } |
| 1834 | |
| 1835 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1836 | void MacroAssembler::Allocate(Register object_size, |
| 1837 | Register result, |
| 1838 | Register scratch1, |
| 1839 | Register scratch2, |
| 1840 | Label* gc_required, |
| 1841 | AllocationFlags flags) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1842 | if (!FLAG_inline_new) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1843 | if (emit_debug_code()) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1844 | // Trash the registers to simulate an allocation failure. |
| 1845 | mov(result, Operand(0x7091)); |
| 1846 | mov(scratch1, Operand(0x7191)); |
| 1847 | mov(scratch2, Operand(0x7291)); |
| 1848 | } |
| 1849 | jmp(gc_required); |
| 1850 | return; |
| 1851 | } |
| 1852 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1853 | // Assert that the register arguments are different and that none of |
| 1854 | // them are ip. ip is used explicitly in the code generated below. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1855 | DCHECK(!result.is(scratch1)); |
| 1856 | DCHECK(!result.is(scratch2)); |
| 1857 | DCHECK(!scratch1.is(scratch2)); |
| 1858 | DCHECK(!object_size.is(ip)); |
| 1859 | DCHECK(!result.is(ip)); |
| 1860 | DCHECK(!scratch1.is(ip)); |
| 1861 | DCHECK(!scratch2.is(ip)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1862 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1863 | // Check relative positions of allocation top and limit addresses. |
| 1864 | // The values must be adjacent in memory to allow the use of LDM. |
| 1865 | // Also, assert that the registers are numbered such that the values |
| 1866 | // are loaded in the correct order. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1867 | ExternalReference allocation_top = |
| 1868 | AllocationUtils::GetAllocationTopReference(isolate(), flags); |
| 1869 | ExternalReference allocation_limit = |
| 1870 | AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1871 | intptr_t top = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1872 | reinterpret_cast<intptr_t>(allocation_top.address()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1873 | intptr_t limit = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1874 | reinterpret_cast<intptr_t>(allocation_limit.address()); |
| 1875 | DCHECK((limit - top) == kPointerSize); |
| 1876 | DCHECK(result.code() < ip.code()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1877 | |
| 1878 | // Set up allocation top address. |
| 1879 | Register topaddr = scratch1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1880 | mov(topaddr, Operand(allocation_top)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1881 | |
| 1882 | // This code stores a temporary value in ip. This is OK, as the code below |
| 1883 | // does not need ip for implicit literal generation. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1884 | if ((flags & RESULT_CONTAINS_TOP) == 0) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1885 | // Load allocation top into result and allocation limit into ip. |
| 1886 | ldm(ia, topaddr, result.bit() | ip.bit()); |
| 1887 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1888 | if (emit_debug_code()) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1889 | // Assert that result actually contains top on entry. ip is used |
| 1890 | // immediately below so this use of ip does not cause difference with |
| 1891 | // respect to register content between debug and release mode. |
| 1892 | ldr(ip, MemOperand(topaddr)); |
| 1893 | cmp(result, ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1894 | Check(eq, kUnexpectedAllocationTop); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1895 | } |
| 1896 | // Load allocation limit into ip. Result already contains allocation top. |
| 1897 | ldr(ip, MemOperand(topaddr, limit - top)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1898 | } |
| 1899 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1900 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| 1901 | // Align the next allocation. Storing the filler map without checking top is |
| 1902 | // safe in new-space because the limit of the heap is aligned there. |
| 1903 | DCHECK((flags & PRETENURE_OLD_POINTER_SPACE) == 0); |
| 1904 | DCHECK(kPointerAlignment * 2 == kDoubleAlignment); |
| 1905 | and_(scratch2, result, Operand(kDoubleAlignmentMask), SetCC); |
| 1906 | Label aligned; |
| 1907 | b(eq, &aligned); |
| 1908 | if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) { |
| 1909 | cmp(result, Operand(ip)); |
| 1910 | b(hs, gc_required); |
| 1911 | } |
| 1912 | mov(scratch2, Operand(isolate()->factory()->one_pointer_filler_map())); |
| 1913 | str(scratch2, MemOperand(result, kDoubleSize / 2, PostIndex)); |
| 1914 | bind(&aligned); |
| 1915 | } |
| 1916 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1917 | // Calculate new top and bail out if new space is exhausted. Use result |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1918 | // to calculate the new top. Object size may be in words so a shift is |
| 1919 | // required to get the number of bytes. |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1920 | if ((flags & SIZE_IN_WORDS) != 0) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1921 | add(scratch2, result, Operand(object_size, LSL, kPointerSizeLog2), SetCC); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1922 | } else { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1923 | add(scratch2, result, Operand(object_size), SetCC); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1924 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1925 | b(cs, gc_required); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1926 | cmp(scratch2, Operand(ip)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1927 | b(hi, gc_required); |
| 1928 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1929 | // Update allocation top. result temporarily holds the new top. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1930 | if (emit_debug_code()) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1931 | tst(scratch2, Operand(kObjectAlignmentMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1932 | Check(eq, kUnalignedAllocationInNewSpace); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1933 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1934 | str(scratch2, MemOperand(topaddr)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1935 | |
| 1936 | // Tag object if requested. |
| 1937 | if ((flags & TAG_OBJECT) != 0) { |
| 1938 | add(result, result, Operand(kHeapObjectTag)); |
| 1939 | } |
| 1940 | } |
| 1941 | |
| 1942 | |
| 1943 | void MacroAssembler::UndoAllocationInNewSpace(Register object, |
| 1944 | Register scratch) { |
| 1945 | ExternalReference new_space_allocation_top = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1946 | ExternalReference::new_space_allocation_top_address(isolate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1947 | |
| 1948 | // Make sure the object has no tag before resetting top. |
| 1949 | and_(object, object, Operand(~kHeapObjectTagMask)); |
| 1950 | #ifdef DEBUG |
| 1951 | // Check that the object un-allocated is below the current top. |
| 1952 | mov(scratch, Operand(new_space_allocation_top)); |
| 1953 | ldr(scratch, MemOperand(scratch)); |
| 1954 | cmp(object, scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1955 | Check(lt, kUndoAllocationOfNonAllocatedMemory); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1956 | #endif |
| 1957 | // Write the address of the object to un-allocate as the current top. |
| 1958 | mov(scratch, Operand(new_space_allocation_top)); |
| 1959 | str(object, MemOperand(scratch)); |
| 1960 | } |
| 1961 | |
| 1962 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1963 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 1964 | Register length, |
| 1965 | Register scratch1, |
| 1966 | Register scratch2, |
| 1967 | Register scratch3, |
| 1968 | Label* gc_required) { |
| 1969 | // Calculate the number of bytes needed for the characters in the string while |
| 1970 | // observing object alignment. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1971 | DCHECK((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1972 | mov(scratch1, Operand(length, LSL, 1)); // Length in bytes, not chars. |
| 1973 | add(scratch1, scratch1, |
| 1974 | Operand(kObjectAlignmentMask + SeqTwoByteString::kHeaderSize)); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1975 | and_(scratch1, scratch1, Operand(~kObjectAlignmentMask)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1976 | |
| 1977 | // Allocate two-byte string in new space. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1978 | Allocate(scratch1, |
| 1979 | result, |
| 1980 | scratch2, |
| 1981 | scratch3, |
| 1982 | gc_required, |
| 1983 | TAG_OBJECT); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1984 | |
| 1985 | // Set the map, length and hash field. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1986 | InitializeNewString(result, |
| 1987 | length, |
| 1988 | Heap::kStringMapRootIndex, |
| 1989 | scratch1, |
| 1990 | scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1991 | } |
| 1992 | |
| 1993 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1994 | void MacroAssembler::AllocateOneByteString(Register result, Register length, |
| 1995 | Register scratch1, Register scratch2, |
| 1996 | Register scratch3, |
| 1997 | Label* gc_required) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1998 | // Calculate the number of bytes needed for the characters in the string while |
| 1999 | // observing object alignment. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2000 | DCHECK((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 2001 | DCHECK(kCharSize == 1); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2002 | add(scratch1, length, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2003 | Operand(kObjectAlignmentMask + SeqOneByteString::kHeaderSize)); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 2004 | and_(scratch1, scratch1, Operand(~kObjectAlignmentMask)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2005 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2006 | // Allocate one-byte string in new space. |
| 2007 | Allocate(scratch1, |
| 2008 | result, |
| 2009 | scratch2, |
| 2010 | scratch3, |
| 2011 | gc_required, |
| 2012 | TAG_OBJECT); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2013 | |
| 2014 | // Set the map, length and hash field. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2015 | InitializeNewString(result, length, Heap::kOneByteStringMapRootIndex, |
| 2016 | scratch1, scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2017 | } |
| 2018 | |
| 2019 | |
| 2020 | void MacroAssembler::AllocateTwoByteConsString(Register result, |
| 2021 | Register length, |
| 2022 | Register scratch1, |
| 2023 | Register scratch2, |
| 2024 | Label* gc_required) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2025 | Allocate(ConsString::kSize, result, scratch1, scratch2, gc_required, |
| 2026 | TAG_OBJECT); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2027 | |
| 2028 | InitializeNewString(result, |
| 2029 | length, |
| 2030 | Heap::kConsStringMapRootIndex, |
| 2031 | scratch1, |
| 2032 | scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2033 | } |
| 2034 | |
| 2035 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2036 | void MacroAssembler::AllocateOneByteConsString(Register result, Register length, |
| 2037 | Register scratch1, |
| 2038 | Register scratch2, |
| 2039 | Label* gc_required) { |
| 2040 | Allocate(ConsString::kSize, |
| 2041 | result, |
| 2042 | scratch1, |
| 2043 | scratch2, |
| 2044 | gc_required, |
| 2045 | TAG_OBJECT); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2046 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2047 | InitializeNewString(result, length, Heap::kConsOneByteStringMapRootIndex, |
| 2048 | scratch1, scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2049 | } |
| 2050 | |
| 2051 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2052 | void MacroAssembler::AllocateTwoByteSlicedString(Register result, |
| 2053 | Register length, |
| 2054 | Register scratch1, |
| 2055 | Register scratch2, |
| 2056 | Label* gc_required) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2057 | Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
| 2058 | TAG_OBJECT); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2059 | |
| 2060 | InitializeNewString(result, |
| 2061 | length, |
| 2062 | Heap::kSlicedStringMapRootIndex, |
| 2063 | scratch1, |
| 2064 | scratch2); |
| 2065 | } |
| 2066 | |
| 2067 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2068 | void MacroAssembler::AllocateOneByteSlicedString(Register result, |
| 2069 | Register length, |
| 2070 | Register scratch1, |
| 2071 | Register scratch2, |
| 2072 | Label* gc_required) { |
| 2073 | Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
| 2074 | TAG_OBJECT); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2075 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2076 | InitializeNewString(result, length, Heap::kSlicedOneByteStringMapRootIndex, |
| 2077 | scratch1, scratch2); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2078 | } |
| 2079 | |
| 2080 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2081 | void MacroAssembler::CompareObjectType(Register object, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2082 | Register map, |
| 2083 | Register type_reg, |
| 2084 | InstanceType type) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2085 | const Register temp = type_reg.is(no_reg) ? ip : type_reg; |
| 2086 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2087 | ldr(map, FieldMemOperand(object, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2088 | CompareInstanceType(map, temp, type); |
| 2089 | } |
| 2090 | |
| 2091 | |
| 2092 | void MacroAssembler::CheckObjectTypeRange(Register object, |
| 2093 | Register map, |
| 2094 | InstanceType min_type, |
| 2095 | InstanceType max_type, |
| 2096 | Label* false_label) { |
| 2097 | STATIC_ASSERT(Map::kInstanceTypeOffset < 4096); |
| 2098 | STATIC_ASSERT(LAST_TYPE < 256); |
| 2099 | ldr(map, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 2100 | ldrb(ip, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 2101 | sub(ip, ip, Operand(min_type)); |
| 2102 | cmp(ip, Operand(max_type - min_type)); |
| 2103 | b(hi, false_label); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2104 | } |
| 2105 | |
| 2106 | |
| 2107 | void MacroAssembler::CompareInstanceType(Register map, |
| 2108 | Register type_reg, |
| 2109 | InstanceType type) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2110 | // Registers map and type_reg can be ip. These two lines assert |
| 2111 | // that ip can be used with the two instructions (the constants |
| 2112 | // will never need ip). |
| 2113 | STATIC_ASSERT(Map::kInstanceTypeOffset < 4096); |
| 2114 | STATIC_ASSERT(LAST_TYPE < 256); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2115 | ldrb(type_reg, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 2116 | cmp(type_reg, Operand(type)); |
| 2117 | } |
| 2118 | |
| 2119 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2120 | void MacroAssembler::CompareRoot(Register obj, |
| 2121 | Heap::RootListIndex index) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2122 | DCHECK(!obj.is(ip)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2123 | LoadRoot(ip, index); |
| 2124 | cmp(obj, ip); |
| 2125 | } |
| 2126 | |
| 2127 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2128 | void MacroAssembler::CheckFastElements(Register map, |
| 2129 | Register scratch, |
| 2130 | Label* fail) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2131 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 2132 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 2133 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 2134 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2135 | ldrb(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2136 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2137 | b(hi, fail); |
| 2138 | } |
| 2139 | |
| 2140 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2141 | void MacroAssembler::CheckFastObjectElements(Register map, |
| 2142 | Register scratch, |
| 2143 | Label* fail) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2144 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 2145 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 2146 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 2147 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2148 | ldrb(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2149 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2150 | b(ls, fail); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2151 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2152 | b(hi, fail); |
| 2153 | } |
| 2154 | |
| 2155 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2156 | void MacroAssembler::CheckFastSmiElements(Register map, |
| 2157 | Register scratch, |
| 2158 | Label* fail) { |
| 2159 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 2160 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2161 | ldrb(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2162 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2163 | b(hi, fail); |
| 2164 | } |
| 2165 | |
| 2166 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2167 | void MacroAssembler::StoreNumberToDoubleElements( |
| 2168 | Register value_reg, |
| 2169 | Register key_reg, |
| 2170 | Register elements_reg, |
| 2171 | Register scratch1, |
| 2172 | LowDwVfpRegister double_scratch, |
| 2173 | Label* fail, |
| 2174 | int elements_offset) { |
| 2175 | Label smi_value, store; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2176 | |
| 2177 | // Handle smi values specially. |
| 2178 | JumpIfSmi(value_reg, &smi_value); |
| 2179 | |
| 2180 | // Ensure that the object is a heap number |
| 2181 | CheckMap(value_reg, |
| 2182 | scratch1, |
| 2183 | isolate()->factory()->heap_number_map(), |
| 2184 | fail, |
| 2185 | DONT_DO_SMI_CHECK); |
| 2186 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2187 | vldr(double_scratch, FieldMemOperand(value_reg, HeapNumber::kValueOffset)); |
| 2188 | // Force a canonical NaN. |
| 2189 | if (emit_debug_code()) { |
| 2190 | vmrs(ip); |
| 2191 | tst(ip, Operand(kVFPDefaultNaNModeControlBit)); |
| 2192 | Assert(ne, kDefaultNaNModeNotSet); |
| 2193 | } |
| 2194 | VFPCanonicalizeNaN(double_scratch); |
| 2195 | b(&store); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2196 | |
| 2197 | bind(&smi_value); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2198 | SmiToDouble(double_scratch, value_reg); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2199 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2200 | bind(&store); |
| 2201 | add(scratch1, elements_reg, Operand::DoubleOffsetFromSmiKey(key_reg)); |
| 2202 | vstr(double_scratch, |
| 2203 | FieldMemOperand(scratch1, |
| 2204 | FixedDoubleArray::kHeaderSize - elements_offset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2205 | } |
| 2206 | |
| 2207 | |
| 2208 | void MacroAssembler::CompareMap(Register obj, |
| 2209 | Register scratch, |
| 2210 | Handle<Map> map, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2211 | Label* early_success) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2212 | ldr(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2213 | CompareMap(scratch, map, early_success); |
| 2214 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2215 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2216 | |
| 2217 | void MacroAssembler::CompareMap(Register obj_map, |
| 2218 | Handle<Map> map, |
| 2219 | Label* early_success) { |
| 2220 | cmp(obj_map, Operand(map)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2221 | } |
| 2222 | |
| 2223 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2224 | void MacroAssembler::CheckMap(Register obj, |
| 2225 | Register scratch, |
| 2226 | Handle<Map> map, |
| 2227 | Label* fail, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2228 | SmiCheckType smi_check_type) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2229 | if (smi_check_type == DO_SMI_CHECK) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2230 | JumpIfSmi(obj, fail); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2231 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2232 | |
| 2233 | Label success; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2234 | CompareMap(obj, scratch, map, &success); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2235 | b(ne, fail); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2236 | bind(&success); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2237 | } |
| 2238 | |
| 2239 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2240 | void MacroAssembler::CheckMap(Register obj, |
| 2241 | Register scratch, |
| 2242 | Heap::RootListIndex index, |
| 2243 | Label* fail, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2244 | SmiCheckType smi_check_type) { |
| 2245 | if (smi_check_type == DO_SMI_CHECK) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2246 | JumpIfSmi(obj, fail); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2247 | } |
| 2248 | ldr(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| 2249 | LoadRoot(ip, index); |
| 2250 | cmp(scratch, ip); |
| 2251 | b(ne, fail); |
| 2252 | } |
| 2253 | |
| 2254 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 2255 | void MacroAssembler::DispatchWeakMap(Register obj, Register scratch1, |
| 2256 | Register scratch2, Handle<WeakCell> cell, |
| 2257 | Handle<Code> success, |
| 2258 | SmiCheckType smi_check_type) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2259 | Label fail; |
| 2260 | if (smi_check_type == DO_SMI_CHECK) { |
| 2261 | JumpIfSmi(obj, &fail); |
| 2262 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 2263 | ldr(scratch1, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| 2264 | CmpWeakValue(scratch1, cell, scratch2); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2265 | Jump(success, RelocInfo::CODE_TARGET, eq); |
| 2266 | bind(&fail); |
| 2267 | } |
| 2268 | |
| 2269 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 2270 | void MacroAssembler::CmpWeakValue(Register value, Handle<WeakCell> cell, |
| 2271 | Register scratch) { |
| 2272 | mov(scratch, Operand(cell)); |
| 2273 | ldr(scratch, FieldMemOperand(scratch, WeakCell::kValueOffset)); |
| 2274 | cmp(value, scratch); |
| 2275 | } |
| 2276 | |
| 2277 | |
| 2278 | void MacroAssembler::LoadWeakValue(Register value, Handle<WeakCell> cell, |
| 2279 | Label* miss) { |
| 2280 | mov(value, Operand(cell)); |
| 2281 | ldr(value, FieldMemOperand(value, WeakCell::kValueOffset)); |
| 2282 | JumpIfSmi(value, miss); |
| 2283 | } |
| 2284 | |
| 2285 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2286 | void MacroAssembler::TryGetFunctionPrototype(Register function, |
| 2287 | Register result, |
| 2288 | Register scratch, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2289 | Label* miss, |
| 2290 | bool miss_on_bound_function) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2291 | Label non_instance; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2292 | if (miss_on_bound_function) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2293 | // Check that the receiver isn't a smi. |
| 2294 | JumpIfSmi(function, miss); |
| 2295 | |
| 2296 | // Check that the function really is a function. Load map into result reg. |
| 2297 | CompareObjectType(function, result, scratch, JS_FUNCTION_TYPE); |
| 2298 | b(ne, miss); |
| 2299 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2300 | ldr(scratch, |
| 2301 | FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 2302 | ldr(scratch, |
| 2303 | FieldMemOperand(scratch, SharedFunctionInfo::kCompilerHintsOffset)); |
| 2304 | tst(scratch, |
| 2305 | Operand(Smi::FromInt(1 << SharedFunctionInfo::kBoundFunction))); |
| 2306 | b(ne, miss); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2307 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2308 | // Make sure that the function has an instance prototype. |
| 2309 | ldrb(scratch, FieldMemOperand(result, Map::kBitFieldOffset)); |
| 2310 | tst(scratch, Operand(1 << Map::kHasNonInstancePrototype)); |
| 2311 | b(ne, &non_instance); |
| 2312 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2313 | |
| 2314 | // Get the prototype or initial map from the function. |
| 2315 | ldr(result, |
| 2316 | FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 2317 | |
| 2318 | // If the prototype or initial map is the hole, don't return it and |
| 2319 | // simply miss the cache instead. This will allow us to allocate a |
| 2320 | // prototype object on-demand in the runtime system. |
| 2321 | LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 2322 | cmp(result, ip); |
| 2323 | b(eq, miss); |
| 2324 | |
| 2325 | // If the function does not have an initial map, we're done. |
| 2326 | Label done; |
| 2327 | CompareObjectType(result, scratch, scratch, MAP_TYPE); |
| 2328 | b(ne, &done); |
| 2329 | |
| 2330 | // Get the prototype from the initial map. |
| 2331 | ldr(result, FieldMemOperand(result, Map::kPrototypeOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2332 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2333 | if (miss_on_bound_function) { |
| 2334 | jmp(&done); |
| 2335 | |
| 2336 | // Non-instance prototype: Fetch prototype from constructor field |
| 2337 | // in initial map. |
| 2338 | bind(&non_instance); |
| 2339 | ldr(result, FieldMemOperand(result, Map::kConstructorOffset)); |
| 2340 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2341 | |
| 2342 | // All done. |
| 2343 | bind(&done); |
| 2344 | } |
| 2345 | |
| 2346 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2347 | void MacroAssembler::CallStub(CodeStub* stub, |
| 2348 | TypeFeedbackId ast_id, |
| 2349 | Condition cond) { |
| 2350 | DCHECK(AllowThisStubCall(stub)); // Stub calls are not allowed in some stubs. |
| 2351 | Call(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id, cond); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2352 | } |
| 2353 | |
| 2354 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2355 | void MacroAssembler::TailCallStub(CodeStub* stub, Condition cond) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2356 | Jump(stub->GetCode(), RelocInfo::CODE_TARGET, cond); |
| 2357 | } |
| 2358 | |
| 2359 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2360 | static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { |
| 2361 | return ref0.address() - ref1.address(); |
| 2362 | } |
| 2363 | |
| 2364 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2365 | void MacroAssembler::CallApiFunctionAndReturn( |
| 2366 | Register function_address, |
| 2367 | ExternalReference thunk_ref, |
| 2368 | int stack_space, |
| 2369 | MemOperand return_value_operand, |
| 2370 | MemOperand* context_restore_operand) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2371 | ExternalReference next_address = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2372 | ExternalReference::handle_scope_next_address(isolate()); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2373 | const int kNextOffset = 0; |
| 2374 | const int kLimitOffset = AddressOffset( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2375 | ExternalReference::handle_scope_limit_address(isolate()), |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2376 | next_address); |
| 2377 | const int kLevelOffset = AddressOffset( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2378 | ExternalReference::handle_scope_level_address(isolate()), |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2379 | next_address); |
| 2380 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2381 | DCHECK(function_address.is(r1) || function_address.is(r2)); |
| 2382 | |
| 2383 | Label profiler_disabled; |
| 2384 | Label end_profiler_check; |
| 2385 | mov(r9, Operand(ExternalReference::is_profiling_address(isolate()))); |
| 2386 | ldrb(r9, MemOperand(r9, 0)); |
| 2387 | cmp(r9, Operand(0)); |
| 2388 | b(eq, &profiler_disabled); |
| 2389 | |
| 2390 | // Additional parameter is the address of the actual callback. |
| 2391 | mov(r3, Operand(thunk_ref)); |
| 2392 | jmp(&end_profiler_check); |
| 2393 | |
| 2394 | bind(&profiler_disabled); |
| 2395 | Move(r3, function_address); |
| 2396 | bind(&end_profiler_check); |
| 2397 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2398 | // Allocate HandleScope in callee-save registers. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2399 | mov(r9, Operand(next_address)); |
| 2400 | ldr(r4, MemOperand(r9, kNextOffset)); |
| 2401 | ldr(r5, MemOperand(r9, kLimitOffset)); |
| 2402 | ldr(r6, MemOperand(r9, kLevelOffset)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2403 | add(r6, r6, Operand(1)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2404 | str(r6, MemOperand(r9, kLevelOffset)); |
| 2405 | |
| 2406 | if (FLAG_log_timer_events) { |
| 2407 | FrameScope frame(this, StackFrame::MANUAL); |
| 2408 | PushSafepointRegisters(); |
| 2409 | PrepareCallCFunction(1, r0); |
| 2410 | mov(r0, Operand(ExternalReference::isolate_address(isolate()))); |
| 2411 | CallCFunction(ExternalReference::log_enter_external_function(isolate()), 1); |
| 2412 | PopSafepointRegisters(); |
| 2413 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2414 | |
| 2415 | // Native call returns to the DirectCEntry stub which redirects to the |
| 2416 | // return address pushed on stack (could have moved after GC). |
| 2417 | // DirectCEntry stub itself is generated early and never moves. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2418 | DirectCEntryStub stub(isolate()); |
| 2419 | stub.GenerateCall(this, r3); |
| 2420 | |
| 2421 | if (FLAG_log_timer_events) { |
| 2422 | FrameScope frame(this, StackFrame::MANUAL); |
| 2423 | PushSafepointRegisters(); |
| 2424 | PrepareCallCFunction(1, r0); |
| 2425 | mov(r0, Operand(ExternalReference::isolate_address(isolate()))); |
| 2426 | CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1); |
| 2427 | PopSafepointRegisters(); |
| 2428 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2429 | |
| 2430 | Label promote_scheduled_exception; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2431 | Label exception_handled; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2432 | Label delete_allocated_handles; |
| 2433 | Label leave_exit_frame; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2434 | Label return_value_loaded; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2435 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2436 | // load value from ReturnValue |
| 2437 | ldr(r0, return_value_operand); |
| 2438 | bind(&return_value_loaded); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2439 | // No more valid handles (the result handle was the last one). Restore |
| 2440 | // previous handle scope. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2441 | str(r4, MemOperand(r9, kNextOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2442 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2443 | ldr(r1, MemOperand(r9, kLevelOffset)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2444 | cmp(r1, r6); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2445 | Check(eq, kUnexpectedLevelAfterReturnFromApiCall); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2446 | } |
| 2447 | sub(r6, r6, Operand(1)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2448 | str(r6, MemOperand(r9, kLevelOffset)); |
| 2449 | ldr(ip, MemOperand(r9, kLimitOffset)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2450 | cmp(r5, ip); |
| 2451 | b(ne, &delete_allocated_handles); |
| 2452 | |
| 2453 | // Check if the function scheduled an exception. |
| 2454 | bind(&leave_exit_frame); |
| 2455 | LoadRoot(r4, Heap::kTheHoleValueRootIndex); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2456 | mov(ip, Operand(ExternalReference::scheduled_exception_address(isolate()))); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2457 | ldr(r5, MemOperand(ip)); |
| 2458 | cmp(r4, r5); |
| 2459 | b(ne, &promote_scheduled_exception); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2460 | bind(&exception_handled); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2461 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2462 | bool restore_context = context_restore_operand != NULL; |
| 2463 | if (restore_context) { |
| 2464 | ldr(cp, *context_restore_operand); |
| 2465 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2466 | // LeaveExitFrame expects unwind space to be in a register. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2467 | mov(r4, Operand(stack_space)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2468 | LeaveExitFrame(false, r4, !restore_context); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2469 | mov(pc, lr); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2470 | |
| 2471 | bind(&promote_scheduled_exception); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2472 | { |
| 2473 | FrameScope frame(this, StackFrame::INTERNAL); |
| 2474 | CallExternalReference( |
| 2475 | ExternalReference(Runtime::kPromoteScheduledException, isolate()), |
| 2476 | 0); |
| 2477 | } |
| 2478 | jmp(&exception_handled); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2479 | |
| 2480 | // HandleScope limit has changed. Delete allocated extensions. |
| 2481 | bind(&delete_allocated_handles); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2482 | str(r5, MemOperand(r9, kLimitOffset)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2483 | mov(r4, r0); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2484 | PrepareCallCFunction(1, r5); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2485 | mov(r0, Operand(ExternalReference::isolate_address(isolate()))); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2486 | CallCFunction( |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2487 | ExternalReference::delete_handle_scope_extensions(isolate()), 1); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2488 | mov(r0, r4); |
| 2489 | jmp(&leave_exit_frame); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2490 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2491 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2492 | |
| 2493 | bool MacroAssembler::AllowThisStubCall(CodeStub* stub) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2494 | return has_frame_ || !stub->SometimesSetsUpAFrame(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2495 | } |
| 2496 | |
| 2497 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2498 | void MacroAssembler::IndexFromHash(Register hash, Register index) { |
| 2499 | // If the hash field contains an array index pick it out. The assert checks |
| 2500 | // that the constants for the maximum number of digits for an array index |
| 2501 | // cached in the hash field and the number of bits reserved for it does not |
| 2502 | // conflict. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2503 | DCHECK(TenToThe(String::kMaxCachedArrayIndexLength) < |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2504 | (1 << String::kArrayIndexValueBits)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2505 | DecodeFieldToSmi<String::ArrayIndexValueBits>(index, hash); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2506 | } |
| 2507 | |
| 2508 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2509 | void MacroAssembler::SmiToDouble(LowDwVfpRegister value, Register smi) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2510 | if (CpuFeatures::IsSupported(VFP3)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2511 | vmov(value.low(), smi); |
| 2512 | vcvt_f64_s32(value, 1); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 2513 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2514 | SmiUntag(ip, smi); |
| 2515 | vmov(value.low(), ip); |
| 2516 | vcvt_f64_s32(value, value.low()); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 2517 | } |
| 2518 | } |
| 2519 | |
| 2520 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2521 | void MacroAssembler::TestDoubleIsInt32(DwVfpRegister double_input, |
| 2522 | LowDwVfpRegister double_scratch) { |
| 2523 | DCHECK(!double_input.is(double_scratch)); |
| 2524 | vcvt_s32_f64(double_scratch.low(), double_input); |
| 2525 | vcvt_f64_s32(double_scratch, double_scratch.low()); |
| 2526 | VFPCompareAndSetFlags(double_input, double_scratch); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2527 | } |
| 2528 | |
| 2529 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2530 | void MacroAssembler::TryDoubleToInt32Exact(Register result, |
| 2531 | DwVfpRegister double_input, |
| 2532 | LowDwVfpRegister double_scratch) { |
| 2533 | DCHECK(!double_input.is(double_scratch)); |
| 2534 | vcvt_s32_f64(double_scratch.low(), double_input); |
| 2535 | vmov(result, double_scratch.low()); |
| 2536 | vcvt_f64_s32(double_scratch, double_scratch.low()); |
| 2537 | VFPCompareAndSetFlags(double_input, double_scratch); |
| 2538 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2539 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2540 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2541 | void MacroAssembler::TryInt32Floor(Register result, |
| 2542 | DwVfpRegister double_input, |
| 2543 | Register input_high, |
| 2544 | LowDwVfpRegister double_scratch, |
| 2545 | Label* done, |
| 2546 | Label* exact) { |
| 2547 | DCHECK(!result.is(input_high)); |
| 2548 | DCHECK(!double_input.is(double_scratch)); |
| 2549 | Label negative, exception; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2550 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2551 | VmovHigh(input_high, double_input); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2552 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2553 | // Test for NaN and infinities. |
| 2554 | Sbfx(result, input_high, |
| 2555 | HeapNumber::kExponentShift, HeapNumber::kExponentBits); |
| 2556 | cmp(result, Operand(-1)); |
| 2557 | b(eq, &exception); |
| 2558 | // Test for values that can be exactly represented as a |
| 2559 | // signed 32-bit integer. |
| 2560 | TryDoubleToInt32Exact(result, double_input, double_scratch); |
| 2561 | // If exact, return (result already fetched). |
| 2562 | b(eq, exact); |
| 2563 | cmp(input_high, Operand::Zero()); |
| 2564 | b(mi, &negative); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2565 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2566 | // Input is in ]+0, +inf[. |
| 2567 | // If result equals 0x7fffffff input was out of range or |
| 2568 | // in ]0x7fffffff, 0x80000000[. We ignore this last case which |
| 2569 | // could fits into an int32, that means we always think input was |
| 2570 | // out of range and always go to exception. |
| 2571 | // If result < 0x7fffffff, go to done, result fetched. |
| 2572 | cmn(result, Operand(1)); |
| 2573 | b(mi, &exception); |
| 2574 | b(done); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2575 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2576 | // Input is in ]-inf, -0[. |
| 2577 | // If x is a non integer negative number, |
| 2578 | // floor(x) <=> round_to_zero(x) - 1. |
| 2579 | bind(&negative); |
| 2580 | sub(result, result, Operand(1), SetCC); |
| 2581 | // If result is still negative, go to done, result fetched. |
| 2582 | // Else, we had an overflow and we fall through exception. |
| 2583 | b(mi, done); |
| 2584 | bind(&exception); |
| 2585 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2586 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2587 | void MacroAssembler::TryInlineTruncateDoubleToI(Register result, |
| 2588 | DwVfpRegister double_input, |
| 2589 | Label* done) { |
| 2590 | LowDwVfpRegister double_scratch = kScratchDoubleReg; |
| 2591 | vcvt_s32_f64(double_scratch.low(), double_input); |
| 2592 | vmov(result, double_scratch.low()); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2593 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2594 | // If result is not saturated (0x7fffffff or 0x80000000), we are done. |
| 2595 | sub(ip, result, Operand(1)); |
| 2596 | cmp(ip, Operand(0x7ffffffe)); |
| 2597 | b(lt, done); |
| 2598 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2599 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2600 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2601 | void MacroAssembler::TruncateDoubleToI(Register result, |
| 2602 | DwVfpRegister double_input) { |
| 2603 | Label done; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2604 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2605 | TryInlineTruncateDoubleToI(result, double_input, &done); |
| 2606 | |
| 2607 | // If we fell through then inline version didn't succeed - call stub instead. |
| 2608 | push(lr); |
| 2609 | sub(sp, sp, Operand(kDoubleSize)); // Put input on stack. |
| 2610 | vstr(double_input, MemOperand(sp, 0)); |
| 2611 | |
| 2612 | DoubleToIStub stub(isolate(), sp, result, 0, true, true); |
| 2613 | CallStub(&stub); |
| 2614 | |
| 2615 | add(sp, sp, Operand(kDoubleSize)); |
| 2616 | pop(lr); |
| 2617 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2618 | bind(&done); |
| 2619 | } |
| 2620 | |
| 2621 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2622 | void MacroAssembler::TruncateHeapNumberToI(Register result, |
| 2623 | Register object) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2624 | Label done; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2625 | LowDwVfpRegister double_scratch = kScratchDoubleReg; |
| 2626 | DCHECK(!result.is(object)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2627 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2628 | vldr(double_scratch, |
| 2629 | MemOperand(object, HeapNumber::kValueOffset - kHeapObjectTag)); |
| 2630 | TryInlineTruncateDoubleToI(result, double_scratch, &done); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2631 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2632 | // If we fell through then inline version didn't succeed - call stub instead. |
| 2633 | push(lr); |
| 2634 | DoubleToIStub stub(isolate(), |
| 2635 | object, |
| 2636 | result, |
| 2637 | HeapNumber::kValueOffset - kHeapObjectTag, |
| 2638 | true, |
| 2639 | true); |
| 2640 | CallStub(&stub); |
| 2641 | pop(lr); |
| 2642 | |
| 2643 | bind(&done); |
| 2644 | } |
| 2645 | |
| 2646 | |
| 2647 | void MacroAssembler::TruncateNumberToI(Register object, |
| 2648 | Register result, |
| 2649 | Register heap_number_map, |
| 2650 | Register scratch1, |
| 2651 | Label* not_number) { |
| 2652 | Label done; |
| 2653 | DCHECK(!result.is(object)); |
| 2654 | |
| 2655 | UntagAndJumpIfSmi(result, object, &done); |
| 2656 | JumpIfNotHeapNumber(object, heap_number_map, scratch1, not_number); |
| 2657 | TruncateHeapNumberToI(result, object); |
| 2658 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2659 | bind(&done); |
| 2660 | } |
| 2661 | |
| 2662 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2663 | void MacroAssembler::GetLeastBitsFromSmi(Register dst, |
| 2664 | Register src, |
| 2665 | int num_least_bits) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2666 | if (CpuFeatures::IsSupported(ARMv7) && !predictable_code_size()) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2667 | ubfx(dst, src, kSmiTagSize, num_least_bits); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2668 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2669 | SmiUntag(dst, src); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2670 | and_(dst, dst, Operand((1 << num_least_bits) - 1)); |
| 2671 | } |
| 2672 | } |
| 2673 | |
| 2674 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2675 | void MacroAssembler::GetLeastBitsFromInt32(Register dst, |
| 2676 | Register src, |
| 2677 | int num_least_bits) { |
| 2678 | and_(dst, src, Operand((1 << num_least_bits) - 1)); |
| 2679 | } |
| 2680 | |
| 2681 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2682 | void MacroAssembler::CallRuntime(const Runtime::Function* f, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2683 | int num_arguments, |
| 2684 | SaveFPRegsMode save_doubles) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2685 | // All parameters are on the stack. r0 has the return value after call. |
| 2686 | |
| 2687 | // If the expected number of arguments of the runtime function is |
| 2688 | // constant, we check that the actual number of arguments match the |
| 2689 | // expectation. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2690 | CHECK(f->nargs < 0 || f->nargs == num_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2691 | |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 2692 | // TODO(1236192): Most runtime routines don't need the number of |
| 2693 | // arguments passed in because it is constant. At some point we |
| 2694 | // should remove this need and make the runtime routine entry code |
| 2695 | // smarter. |
| 2696 | mov(r0, Operand(num_arguments)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2697 | mov(r1, Operand(ExternalReference(f, isolate()))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2698 | CEntryStub stub(isolate(), 1, save_doubles); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2699 | CallStub(&stub); |
| 2700 | } |
| 2701 | |
| 2702 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2703 | void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
| 2704 | int num_arguments) { |
| 2705 | mov(r0, Operand(num_arguments)); |
| 2706 | mov(r1, Operand(ext)); |
| 2707 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2708 | CEntryStub stub(isolate(), 1); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2709 | CallStub(&stub); |
| 2710 | } |
| 2711 | |
| 2712 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2713 | void MacroAssembler::TailCallExternalReference(const ExternalReference& ext, |
| 2714 | int num_arguments, |
| 2715 | int result_size) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2716 | // TODO(1236192): Most runtime routines don't need the number of |
| 2717 | // arguments passed in because it is constant. At some point we |
| 2718 | // should remove this need and make the runtime routine entry code |
| 2719 | // smarter. |
| 2720 | mov(r0, Operand(num_arguments)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2721 | JumpToExternalReference(ext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2722 | } |
| 2723 | |
| 2724 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2725 | void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, |
| 2726 | int num_arguments, |
| 2727 | int result_size) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2728 | TailCallExternalReference(ExternalReference(fid, isolate()), |
| 2729 | num_arguments, |
| 2730 | result_size); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2731 | } |
| 2732 | |
| 2733 | |
| 2734 | void MacroAssembler::JumpToExternalReference(const ExternalReference& builtin) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2735 | #if defined(__thumb__) |
| 2736 | // Thumb mode builtin. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2737 | DCHECK((reinterpret_cast<intptr_t>(builtin.address()) & 1) == 1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2738 | #endif |
| 2739 | mov(r1, Operand(builtin)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2740 | CEntryStub stub(isolate(), 1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2741 | Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 2742 | } |
| 2743 | |
| 2744 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2745 | void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2746 | InvokeFlag flag, |
| 2747 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2748 | // You can't call a builtin without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2749 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2750 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2751 | GetBuiltinEntry(r2, id); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2752 | if (flag == CALL_FUNCTION) { |
| 2753 | call_wrapper.BeforeCall(CallSize(r2)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2754 | Call(r2); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2755 | call_wrapper.AfterCall(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2756 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2757 | DCHECK(flag == JUMP_FUNCTION); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2758 | Jump(r2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2759 | } |
| 2760 | } |
| 2761 | |
| 2762 | |
Steve Block | 791712a | 2010-08-27 10:21:07 +0100 | [diff] [blame] | 2763 | void MacroAssembler::GetBuiltinFunction(Register target, |
| 2764 | Builtins::JavaScript id) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2765 | // Load the builtins object into target register. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2766 | ldr(target, |
| 2767 | MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2768 | ldr(target, FieldMemOperand(target, GlobalObject::kBuiltinsOffset)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2769 | // Load the JavaScript builtin function from the builtins object. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2770 | ldr(target, FieldMemOperand(target, |
Steve Block | 791712a | 2010-08-27 10:21:07 +0100 | [diff] [blame] | 2771 | JSBuiltinsObject::OffsetOfFunctionWithId(id))); |
| 2772 | } |
| 2773 | |
| 2774 | |
| 2775 | void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2776 | DCHECK(!target.is(r1)); |
Steve Block | 791712a | 2010-08-27 10:21:07 +0100 | [diff] [blame] | 2777 | GetBuiltinFunction(r1, id); |
| 2778 | // Load the code entry point from the builtins object. |
| 2779 | ldr(target, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2780 | } |
| 2781 | |
| 2782 | |
| 2783 | void MacroAssembler::SetCounter(StatsCounter* counter, int value, |
| 2784 | Register scratch1, Register scratch2) { |
| 2785 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2786 | mov(scratch1, Operand(value)); |
| 2787 | mov(scratch2, Operand(ExternalReference(counter))); |
| 2788 | str(scratch1, MemOperand(scratch2)); |
| 2789 | } |
| 2790 | } |
| 2791 | |
| 2792 | |
| 2793 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value, |
| 2794 | Register scratch1, Register scratch2) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2795 | DCHECK(value > 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2796 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2797 | mov(scratch2, Operand(ExternalReference(counter))); |
| 2798 | ldr(scratch1, MemOperand(scratch2)); |
| 2799 | add(scratch1, scratch1, Operand(value)); |
| 2800 | str(scratch1, MemOperand(scratch2)); |
| 2801 | } |
| 2802 | } |
| 2803 | |
| 2804 | |
| 2805 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value, |
| 2806 | Register scratch1, Register scratch2) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2807 | DCHECK(value > 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2808 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2809 | mov(scratch2, Operand(ExternalReference(counter))); |
| 2810 | ldr(scratch1, MemOperand(scratch2)); |
| 2811 | sub(scratch1, scratch1, Operand(value)); |
| 2812 | str(scratch1, MemOperand(scratch2)); |
| 2813 | } |
| 2814 | } |
| 2815 | |
| 2816 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2817 | void MacroAssembler::Assert(Condition cond, BailoutReason reason) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2818 | if (emit_debug_code()) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2819 | Check(cond, reason); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 2820 | } |
| 2821 | |
| 2822 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2823 | void MacroAssembler::AssertFastElements(Register elements) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2824 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2825 | DCHECK(!elements.is(ip)); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2826 | Label ok; |
| 2827 | push(elements); |
| 2828 | ldr(elements, FieldMemOperand(elements, HeapObject::kMapOffset)); |
| 2829 | LoadRoot(ip, Heap::kFixedArrayMapRootIndex); |
| 2830 | cmp(elements, ip); |
| 2831 | b(eq, &ok); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2832 | LoadRoot(ip, Heap::kFixedDoubleArrayMapRootIndex); |
| 2833 | cmp(elements, ip); |
| 2834 | b(eq, &ok); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2835 | LoadRoot(ip, Heap::kFixedCOWArrayMapRootIndex); |
| 2836 | cmp(elements, ip); |
| 2837 | b(eq, &ok); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2838 | Abort(kJSObjectWithFastElementsMapHasSlowElements); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2839 | bind(&ok); |
| 2840 | pop(elements); |
| 2841 | } |
| 2842 | } |
| 2843 | |
| 2844 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2845 | void MacroAssembler::Check(Condition cond, BailoutReason reason) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2846 | Label L; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2847 | b(cond, &L); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2848 | Abort(reason); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2849 | // will not return here |
| 2850 | bind(&L); |
| 2851 | } |
| 2852 | |
| 2853 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2854 | void MacroAssembler::Abort(BailoutReason reason) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2855 | Label abort_start; |
| 2856 | bind(&abort_start); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2857 | #ifdef DEBUG |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2858 | const char* msg = GetBailoutReason(reason); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2859 | if (msg != NULL) { |
| 2860 | RecordComment("Abort message: "); |
| 2861 | RecordComment(msg); |
| 2862 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2863 | |
| 2864 | if (FLAG_trap_on_abort) { |
| 2865 | stop(msg); |
| 2866 | return; |
| 2867 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2868 | #endif |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2869 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2870 | mov(r0, Operand(Smi::FromInt(reason))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2871 | push(r0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2872 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2873 | // Disable stub call restrictions to always allow calls to abort. |
| 2874 | if (!has_frame_) { |
| 2875 | // We don't actually want to generate a pile of code for this, so just |
| 2876 | // claim there is a stack frame, without generating one. |
| 2877 | FrameScope scope(this, StackFrame::NONE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2878 | CallRuntime(Runtime::kAbort, 1); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2879 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2880 | CallRuntime(Runtime::kAbort, 1); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2881 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2882 | // will not return here |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2883 | if (is_const_pool_blocked()) { |
| 2884 | // If the calling code cares about the exact number of |
| 2885 | // instructions generated, we insert padding here to keep the size |
| 2886 | // of the Abort macro constant. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2887 | static const int kExpectedAbortInstructions = 7; |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2888 | int abort_instructions = InstructionsGeneratedSince(&abort_start); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2889 | DCHECK(abort_instructions <= kExpectedAbortInstructions); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2890 | while (abort_instructions++ < kExpectedAbortInstructions) { |
| 2891 | nop(); |
| 2892 | } |
| 2893 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2894 | } |
| 2895 | |
| 2896 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2897 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 2898 | if (context_chain_length > 0) { |
| 2899 | // Move up the chain of contexts to the context containing the slot. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2900 | ldr(dst, MemOperand(cp, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2901 | for (int i = 1; i < context_chain_length; i++) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2902 | ldr(dst, MemOperand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2903 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2904 | } else { |
| 2905 | // Slot is in the current function context. Move it into the |
| 2906 | // destination register in case we store into it (the write barrier |
| 2907 | // cannot be allowed to destroy the context in esi). |
| 2908 | mov(dst, cp); |
| 2909 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2910 | } |
| 2911 | |
| 2912 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2913 | void MacroAssembler::LoadTransitionedArrayMapConditional( |
| 2914 | ElementsKind expected_kind, |
| 2915 | ElementsKind transitioned_kind, |
| 2916 | Register map_in_out, |
| 2917 | Register scratch, |
| 2918 | Label* no_map_match) { |
| 2919 | // Load the global or builtins object from the current context. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2920 | ldr(scratch, |
| 2921 | MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| 2922 | ldr(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2923 | |
| 2924 | // Check that the function's map is the same as the expected cached map. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2925 | ldr(scratch, |
| 2926 | MemOperand(scratch, |
| 2927 | Context::SlotOffset(Context::JS_ARRAY_MAPS_INDEX))); |
| 2928 | size_t offset = expected_kind * kPointerSize + |
| 2929 | FixedArrayBase::kHeaderSize; |
| 2930 | ldr(ip, FieldMemOperand(scratch, offset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2931 | cmp(map_in_out, ip); |
| 2932 | b(ne, no_map_match); |
| 2933 | |
| 2934 | // Use the transitioned cached map. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2935 | offset = transitioned_kind * kPointerSize + |
| 2936 | FixedArrayBase::kHeaderSize; |
| 2937 | ldr(map_in_out, FieldMemOperand(scratch, offset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2938 | } |
| 2939 | |
| 2940 | |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2941 | void MacroAssembler::LoadGlobalFunction(int index, Register function) { |
| 2942 | // Load the global or builtins object from the current context. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2943 | ldr(function, |
| 2944 | MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| 2945 | // Load the native context from the global or builtins object. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2946 | ldr(function, FieldMemOperand(function, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2947 | GlobalObject::kNativeContextOffset)); |
| 2948 | // Load the function from the native context. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2949 | ldr(function, MemOperand(function, Context::SlotOffset(index))); |
| 2950 | } |
| 2951 | |
| 2952 | |
| 2953 | void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, |
| 2954 | Register map, |
| 2955 | Register scratch) { |
| 2956 | // Load the initial map. The global functions all have initial maps. |
| 2957 | ldr(map, FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2958 | if (emit_debug_code()) { |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2959 | Label ok, fail; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2960 | CheckMap(map, scratch, Heap::kMetaMapRootIndex, &fail, DO_SMI_CHECK); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2961 | b(&ok); |
| 2962 | bind(&fail); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2963 | Abort(kGlobalFunctionsMustHaveInitialMap); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2964 | bind(&ok); |
| 2965 | } |
| 2966 | } |
| 2967 | |
| 2968 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2969 | void MacroAssembler::JumpIfNotPowerOfTwoOrZero( |
| 2970 | Register reg, |
| 2971 | Register scratch, |
| 2972 | Label* not_power_of_two_or_zero) { |
| 2973 | sub(scratch, reg, Operand(1), SetCC); |
| 2974 | b(mi, not_power_of_two_or_zero); |
| 2975 | tst(scratch, reg); |
| 2976 | b(ne, not_power_of_two_or_zero); |
| 2977 | } |
| 2978 | |
| 2979 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2980 | void MacroAssembler::JumpIfNotPowerOfTwoOrZeroAndNeg( |
| 2981 | Register reg, |
| 2982 | Register scratch, |
| 2983 | Label* zero_and_neg, |
| 2984 | Label* not_power_of_two) { |
| 2985 | sub(scratch, reg, Operand(1), SetCC); |
| 2986 | b(mi, zero_and_neg); |
| 2987 | tst(scratch, reg); |
| 2988 | b(ne, not_power_of_two); |
| 2989 | } |
| 2990 | |
| 2991 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2992 | void MacroAssembler::JumpIfNotBothSmi(Register reg1, |
| 2993 | Register reg2, |
| 2994 | Label* on_not_both_smi) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2995 | STATIC_ASSERT(kSmiTag == 0); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2996 | tst(reg1, Operand(kSmiTagMask)); |
| 2997 | tst(reg2, Operand(kSmiTagMask), eq); |
| 2998 | b(ne, on_not_both_smi); |
| 2999 | } |
| 3000 | |
| 3001 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3002 | void MacroAssembler::UntagAndJumpIfSmi( |
| 3003 | Register dst, Register src, Label* smi_case) { |
| 3004 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3005 | SmiUntag(dst, src, SetCC); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3006 | b(cc, smi_case); // Shifter carry is not set for a smi. |
| 3007 | } |
| 3008 | |
| 3009 | |
| 3010 | void MacroAssembler::UntagAndJumpIfNotSmi( |
| 3011 | Register dst, Register src, Label* non_smi_case) { |
| 3012 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3013 | SmiUntag(dst, src, SetCC); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3014 | b(cs, non_smi_case); // Shifter carry is set for a non-smi. |
| 3015 | } |
| 3016 | |
| 3017 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 3018 | void MacroAssembler::JumpIfEitherSmi(Register reg1, |
| 3019 | Register reg2, |
| 3020 | Label* on_either_smi) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3021 | STATIC_ASSERT(kSmiTag == 0); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 3022 | tst(reg1, Operand(kSmiTagMask)); |
| 3023 | tst(reg2, Operand(kSmiTagMask), ne); |
| 3024 | b(eq, on_either_smi); |
| 3025 | } |
| 3026 | |
| 3027 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3028 | void MacroAssembler::AssertNotSmi(Register object) { |
| 3029 | if (emit_debug_code()) { |
| 3030 | STATIC_ASSERT(kSmiTag == 0); |
| 3031 | tst(object, Operand(kSmiTagMask)); |
| 3032 | Check(ne, kOperandIsASmi); |
| 3033 | } |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 3034 | } |
| 3035 | |
| 3036 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3037 | void MacroAssembler::AssertSmi(Register object) { |
| 3038 | if (emit_debug_code()) { |
| 3039 | STATIC_ASSERT(kSmiTag == 0); |
| 3040 | tst(object, Operand(kSmiTagMask)); |
| 3041 | Check(eq, kOperandIsNotSmi); |
| 3042 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3043 | } |
| 3044 | |
| 3045 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3046 | void MacroAssembler::AssertString(Register object) { |
| 3047 | if (emit_debug_code()) { |
| 3048 | STATIC_ASSERT(kSmiTag == 0); |
| 3049 | tst(object, Operand(kSmiTagMask)); |
| 3050 | Check(ne, kOperandIsASmiAndNotAString); |
| 3051 | push(object); |
| 3052 | ldr(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 3053 | CompareInstanceType(object, object, FIRST_NONSTRING_TYPE); |
| 3054 | pop(object); |
| 3055 | Check(lo, kOperandIsNotAString); |
| 3056 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3057 | } |
| 3058 | |
| 3059 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3060 | void MacroAssembler::AssertName(Register object) { |
| 3061 | if (emit_debug_code()) { |
| 3062 | STATIC_ASSERT(kSmiTag == 0); |
| 3063 | tst(object, Operand(kSmiTagMask)); |
| 3064 | Check(ne, kOperandIsASmiAndNotAName); |
| 3065 | push(object); |
| 3066 | ldr(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 3067 | CompareInstanceType(object, object, LAST_NAME_TYPE); |
| 3068 | pop(object); |
| 3069 | Check(le, kOperandIsNotAName); |
| 3070 | } |
| 3071 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3072 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3073 | |
| 3074 | void MacroAssembler::AssertUndefinedOrAllocationSite(Register object, |
| 3075 | Register scratch) { |
| 3076 | if (emit_debug_code()) { |
| 3077 | Label done_checking; |
| 3078 | AssertNotSmi(object); |
| 3079 | CompareRoot(object, Heap::kUndefinedValueRootIndex); |
| 3080 | b(eq, &done_checking); |
| 3081 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 3082 | CompareRoot(scratch, Heap::kAllocationSiteMapRootIndex); |
| 3083 | Assert(eq, kExpectedUndefinedOrCell); |
| 3084 | bind(&done_checking); |
| 3085 | } |
| 3086 | } |
| 3087 | |
| 3088 | |
| 3089 | void MacroAssembler::AssertIsRoot(Register reg, Heap::RootListIndex index) { |
| 3090 | if (emit_debug_code()) { |
| 3091 | CompareRoot(reg, index); |
| 3092 | Check(eq, kHeapNumberMapRegisterClobbered); |
| 3093 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3094 | } |
| 3095 | |
| 3096 | |
| 3097 | void MacroAssembler::JumpIfNotHeapNumber(Register object, |
| 3098 | Register heap_number_map, |
| 3099 | Register scratch, |
| 3100 | Label* on_not_heap_number) { |
| 3101 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3102 | AssertIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3103 | cmp(scratch, heap_number_map); |
| 3104 | b(ne, on_not_heap_number); |
| 3105 | } |
| 3106 | |
| 3107 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3108 | void MacroAssembler::LookupNumberStringCache(Register object, |
| 3109 | Register result, |
| 3110 | Register scratch1, |
| 3111 | Register scratch2, |
| 3112 | Register scratch3, |
| 3113 | Label* not_found) { |
| 3114 | // Use of registers. Register result is used as a temporary. |
| 3115 | Register number_string_cache = result; |
| 3116 | Register mask = scratch3; |
| 3117 | |
| 3118 | // Load the number string cache. |
| 3119 | LoadRoot(number_string_cache, Heap::kNumberStringCacheRootIndex); |
| 3120 | |
| 3121 | // Make the hash mask from the length of the number string cache. It |
| 3122 | // contains two elements (number and string) for each cache entry. |
| 3123 | ldr(mask, FieldMemOperand(number_string_cache, FixedArray::kLengthOffset)); |
| 3124 | // Divide length by two (length is a smi). |
| 3125 | mov(mask, Operand(mask, ASR, kSmiTagSize + 1)); |
| 3126 | sub(mask, mask, Operand(1)); // Make mask. |
| 3127 | |
| 3128 | // Calculate the entry in the number string cache. The hash value in the |
| 3129 | // number string cache for smis is just the smi value, and the hash for |
| 3130 | // doubles is the xor of the upper and lower words. See |
| 3131 | // Heap::GetNumberStringCache. |
| 3132 | Label is_smi; |
| 3133 | Label load_result_from_cache; |
| 3134 | JumpIfSmi(object, &is_smi); |
| 3135 | CheckMap(object, |
| 3136 | scratch1, |
| 3137 | Heap::kHeapNumberMapRootIndex, |
| 3138 | not_found, |
| 3139 | DONT_DO_SMI_CHECK); |
| 3140 | |
| 3141 | STATIC_ASSERT(8 == kDoubleSize); |
| 3142 | add(scratch1, |
| 3143 | object, |
| 3144 | Operand(HeapNumber::kValueOffset - kHeapObjectTag)); |
| 3145 | ldm(ia, scratch1, scratch1.bit() | scratch2.bit()); |
| 3146 | eor(scratch1, scratch1, Operand(scratch2)); |
| 3147 | and_(scratch1, scratch1, Operand(mask)); |
| 3148 | |
| 3149 | // Calculate address of entry in string cache: each entry consists |
| 3150 | // of two pointer sized fields. |
| 3151 | add(scratch1, |
| 3152 | number_string_cache, |
| 3153 | Operand(scratch1, LSL, kPointerSizeLog2 + 1)); |
| 3154 | |
| 3155 | Register probe = mask; |
| 3156 | ldr(probe, FieldMemOperand(scratch1, FixedArray::kHeaderSize)); |
| 3157 | JumpIfSmi(probe, not_found); |
| 3158 | sub(scratch2, object, Operand(kHeapObjectTag)); |
| 3159 | vldr(d0, scratch2, HeapNumber::kValueOffset); |
| 3160 | sub(probe, probe, Operand(kHeapObjectTag)); |
| 3161 | vldr(d1, probe, HeapNumber::kValueOffset); |
| 3162 | VFPCompareAndSetFlags(d0, d1); |
| 3163 | b(ne, not_found); // The cache did not contain this value. |
| 3164 | b(&load_result_from_cache); |
| 3165 | |
| 3166 | bind(&is_smi); |
| 3167 | Register scratch = scratch1; |
| 3168 | and_(scratch, mask, Operand(object, ASR, 1)); |
| 3169 | // Calculate address of entry in string cache: each entry consists |
| 3170 | // of two pointer sized fields. |
| 3171 | add(scratch, |
| 3172 | number_string_cache, |
| 3173 | Operand(scratch, LSL, kPointerSizeLog2 + 1)); |
| 3174 | |
| 3175 | // Check if the entry is the smi we are looking for. |
| 3176 | ldr(probe, FieldMemOperand(scratch, FixedArray::kHeaderSize)); |
| 3177 | cmp(object, probe); |
| 3178 | b(ne, not_found); |
| 3179 | |
| 3180 | // Get the result from the cache. |
| 3181 | bind(&load_result_from_cache); |
| 3182 | ldr(result, FieldMemOperand(scratch, FixedArray::kHeaderSize + kPointerSize)); |
| 3183 | IncrementCounter(isolate()->counters()->number_to_string_native(), |
| 3184 | 1, |
| 3185 | scratch1, |
| 3186 | scratch2); |
| 3187 | } |
| 3188 | |
| 3189 | |
| 3190 | void MacroAssembler::JumpIfNonSmisNotBothSequentialOneByteStrings( |
| 3191 | Register first, Register second, Register scratch1, Register scratch2, |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3192 | Label* failure) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3193 | // Test that both first and second are sequential one-byte strings. |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3194 | // Assume that they are non-smis. |
| 3195 | ldr(scratch1, FieldMemOperand(first, HeapObject::kMapOffset)); |
| 3196 | ldr(scratch2, FieldMemOperand(second, HeapObject::kMapOffset)); |
| 3197 | ldrb(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); |
| 3198 | ldrb(scratch2, FieldMemOperand(scratch2, Map::kInstanceTypeOffset)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3199 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3200 | JumpIfBothInstanceTypesAreNotSequentialOneByte(scratch1, scratch2, scratch1, |
| 3201 | scratch2, failure); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3202 | } |
| 3203 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3204 | void MacroAssembler::JumpIfNotBothSequentialOneByteStrings(Register first, |
| 3205 | Register second, |
| 3206 | Register scratch1, |
| 3207 | Register scratch2, |
| 3208 | Label* failure) { |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3209 | // Check that neither is a smi. |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3210 | and_(scratch1, first, Operand(second)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 3211 | JumpIfSmi(scratch1, failure); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3212 | JumpIfNonSmisNotBothSequentialOneByteStrings(first, second, scratch1, |
| 3213 | scratch2, failure); |
| 3214 | } |
| 3215 | |
| 3216 | |
| 3217 | void MacroAssembler::JumpIfNotUniqueNameInstanceType(Register reg, |
| 3218 | Label* not_unique_name) { |
| 3219 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| 3220 | Label succeed; |
| 3221 | tst(reg, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| 3222 | b(eq, &succeed); |
| 3223 | cmp(reg, Operand(SYMBOL_TYPE)); |
| 3224 | b(ne, not_unique_name); |
| 3225 | |
| 3226 | bind(&succeed); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3227 | } |
| 3228 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 3229 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3230 | // Allocates a heap number or jumps to the need_gc label if the young space |
| 3231 | // is full and a scavenge is needed. |
| 3232 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 3233 | Register scratch1, |
| 3234 | Register scratch2, |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 3235 | Register heap_number_map, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3236 | Label* gc_required, |
| 3237 | TaggingMode tagging_mode, |
| 3238 | MutableMode mode) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3239 | // Allocate an object in the heap for the heap number and tag it as a heap |
| 3240 | // object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3241 | Allocate(HeapNumber::kSize, result, scratch1, scratch2, gc_required, |
| 3242 | tagging_mode == TAG_RESULT ? TAG_OBJECT : NO_ALLOCATION_FLAGS); |
| 3243 | |
| 3244 | Heap::RootListIndex map_index = mode == MUTABLE |
| 3245 | ? Heap::kMutableHeapNumberMapRootIndex |
| 3246 | : Heap::kHeapNumberMapRootIndex; |
| 3247 | AssertIsRoot(heap_number_map, map_index); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3248 | |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 3249 | // Store heap number map in the allocated object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3250 | if (tagging_mode == TAG_RESULT) { |
| 3251 | str(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset)); |
| 3252 | } else { |
| 3253 | str(heap_number_map, MemOperand(result, HeapObject::kMapOffset)); |
| 3254 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3255 | } |
| 3256 | |
| 3257 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 3258 | void MacroAssembler::AllocateHeapNumberWithValue(Register result, |
| 3259 | DwVfpRegister value, |
| 3260 | Register scratch1, |
| 3261 | Register scratch2, |
| 3262 | Register heap_number_map, |
| 3263 | Label* gc_required) { |
| 3264 | AllocateHeapNumber(result, scratch1, scratch2, heap_number_map, gc_required); |
| 3265 | sub(scratch1, result, Operand(kHeapObjectTag)); |
| 3266 | vstr(value, scratch1, HeapNumber::kValueOffset); |
| 3267 | } |
| 3268 | |
| 3269 | |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 3270 | // Copies a fixed number of fields of heap objects from src to dst. |
| 3271 | void MacroAssembler::CopyFields(Register dst, |
| 3272 | Register src, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3273 | LowDwVfpRegister double_scratch, |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 3274 | int field_count) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3275 | int double_count = field_count / (DwVfpRegister::kSizeInBytes / kPointerSize); |
| 3276 | for (int i = 0; i < double_count; i++) { |
| 3277 | vldr(double_scratch, FieldMemOperand(src, i * DwVfpRegister::kSizeInBytes)); |
| 3278 | vstr(double_scratch, FieldMemOperand(dst, i * DwVfpRegister::kSizeInBytes)); |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 3279 | } |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 3280 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3281 | STATIC_ASSERT(SwVfpRegister::kSizeInBytes == kPointerSize); |
| 3282 | STATIC_ASSERT(2 * SwVfpRegister::kSizeInBytes == DwVfpRegister::kSizeInBytes); |
| 3283 | |
| 3284 | int remain = field_count % (DwVfpRegister::kSizeInBytes / kPointerSize); |
| 3285 | if (remain != 0) { |
| 3286 | vldr(double_scratch.low(), |
| 3287 | FieldMemOperand(src, (field_count - 1) * kPointerSize)); |
| 3288 | vstr(double_scratch.low(), |
| 3289 | FieldMemOperand(dst, (field_count - 1) * kPointerSize)); |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 3290 | } |
| 3291 | } |
| 3292 | |
| 3293 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3294 | void MacroAssembler::CopyBytes(Register src, |
| 3295 | Register dst, |
| 3296 | Register length, |
| 3297 | Register scratch) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3298 | Label align_loop_1, word_loop, byte_loop, byte_loop_1, done; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3299 | |
| 3300 | // Align src before copying in word size chunks. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3301 | cmp(length, Operand(kPointerSize)); |
| 3302 | b(le, &byte_loop); |
| 3303 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3304 | bind(&align_loop_1); |
| 3305 | tst(src, Operand(kPointerSize - 1)); |
| 3306 | b(eq, &word_loop); |
| 3307 | ldrb(scratch, MemOperand(src, 1, PostIndex)); |
| 3308 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3309 | sub(length, length, Operand(1), SetCC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3310 | b(&align_loop_1); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3311 | // Copy bytes in word size chunks. |
| 3312 | bind(&word_loop); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3313 | if (emit_debug_code()) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3314 | tst(src, Operand(kPointerSize - 1)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3315 | Assert(eq, kExpectingAlignmentForCopyBytes); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3316 | } |
| 3317 | cmp(length, Operand(kPointerSize)); |
| 3318 | b(lt, &byte_loop); |
| 3319 | ldr(scratch, MemOperand(src, kPointerSize, PostIndex)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3320 | if (CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) { |
| 3321 | str(scratch, MemOperand(dst, kPointerSize, PostIndex)); |
| 3322 | } else { |
| 3323 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3324 | mov(scratch, Operand(scratch, LSR, 8)); |
| 3325 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3326 | mov(scratch, Operand(scratch, LSR, 8)); |
| 3327 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3328 | mov(scratch, Operand(scratch, LSR, 8)); |
| 3329 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3330 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3331 | sub(length, length, Operand(kPointerSize)); |
| 3332 | b(&word_loop); |
| 3333 | |
| 3334 | // Copy the last bytes if any left. |
| 3335 | bind(&byte_loop); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3336 | cmp(length, Operand::Zero()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3337 | b(eq, &done); |
| 3338 | bind(&byte_loop_1); |
| 3339 | ldrb(scratch, MemOperand(src, 1, PostIndex)); |
| 3340 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3341 | sub(length, length, Operand(1), SetCC); |
| 3342 | b(ne, &byte_loop_1); |
| 3343 | bind(&done); |
| 3344 | } |
| 3345 | |
| 3346 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3347 | void MacroAssembler::InitializeFieldsWithFiller(Register start_offset, |
| 3348 | Register end_offset, |
| 3349 | Register filler) { |
| 3350 | Label loop, entry; |
| 3351 | b(&entry); |
| 3352 | bind(&loop); |
| 3353 | str(filler, MemOperand(start_offset, kPointerSize, PostIndex)); |
| 3354 | bind(&entry); |
| 3355 | cmp(start_offset, end_offset); |
| 3356 | b(lt, &loop); |
| 3357 | } |
| 3358 | |
| 3359 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3360 | void MacroAssembler::CheckFor32DRegs(Register scratch) { |
| 3361 | mov(scratch, Operand(ExternalReference::cpu_features())); |
| 3362 | ldr(scratch, MemOperand(scratch)); |
| 3363 | tst(scratch, Operand(1u << VFP32DREGS)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3364 | } |
| 3365 | |
| 3366 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3367 | void MacroAssembler::SaveFPRegs(Register location, Register scratch) { |
| 3368 | CheckFor32DRegs(scratch); |
| 3369 | vstm(db_w, location, d16, d31, ne); |
| 3370 | sub(location, location, Operand(16 * kDoubleSize), LeaveCC, eq); |
| 3371 | vstm(db_w, location, d0, d15); |
| 3372 | } |
| 3373 | |
| 3374 | |
| 3375 | void MacroAssembler::RestoreFPRegs(Register location, Register scratch) { |
| 3376 | CheckFor32DRegs(scratch); |
| 3377 | vldm(ia_w, location, d0, d15); |
| 3378 | vldm(ia_w, location, d16, d31, ne); |
| 3379 | add(location, location, Operand(16 * kDoubleSize), LeaveCC, eq); |
| 3380 | } |
| 3381 | |
| 3382 | |
| 3383 | void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialOneByte( |
| 3384 | Register first, Register second, Register scratch1, Register scratch2, |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3385 | Label* failure) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3386 | const int kFlatOneByteStringMask = |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3387 | kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3388 | const int kFlatOneByteStringTag = |
| 3389 | kStringTag | kOneByteStringTag | kSeqStringTag; |
| 3390 | and_(scratch1, first, Operand(kFlatOneByteStringMask)); |
| 3391 | and_(scratch2, second, Operand(kFlatOneByteStringMask)); |
| 3392 | cmp(scratch1, Operand(kFlatOneByteStringTag)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3393 | // Ignore second test if first test failed. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3394 | cmp(scratch2, Operand(kFlatOneByteStringTag), eq); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3395 | b(ne, failure); |
| 3396 | } |
| 3397 | |
| 3398 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3399 | void MacroAssembler::JumpIfInstanceTypeIsNotSequentialOneByte(Register type, |
| 3400 | Register scratch, |
| 3401 | Label* failure) { |
| 3402 | const int kFlatOneByteStringMask = |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3403 | kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3404 | const int kFlatOneByteStringTag = |
| 3405 | kStringTag | kOneByteStringTag | kSeqStringTag; |
| 3406 | and_(scratch, type, Operand(kFlatOneByteStringMask)); |
| 3407 | cmp(scratch, Operand(kFlatOneByteStringTag)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3408 | b(ne, failure); |
| 3409 | } |
| 3410 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3411 | static const int kRegisterPassedArguments = 4; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3412 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3413 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3414 | int MacroAssembler::CalculateStackPassedWords(int num_reg_arguments, |
| 3415 | int num_double_arguments) { |
| 3416 | int stack_passed_words = 0; |
| 3417 | if (use_eabi_hardfloat()) { |
| 3418 | // In the hard floating point calling convention, we can use |
| 3419 | // all double registers to pass doubles. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3420 | if (num_double_arguments > DoubleRegister::NumRegisters()) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3421 | stack_passed_words += |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3422 | 2 * (num_double_arguments - DoubleRegister::NumRegisters()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3423 | } |
| 3424 | } else { |
| 3425 | // In the soft floating point calling convention, every double |
| 3426 | // argument is passed using two registers. |
| 3427 | num_reg_arguments += 2 * num_double_arguments; |
| 3428 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3429 | // Up to four simple arguments are passed in registers r0..r3. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3430 | if (num_reg_arguments > kRegisterPassedArguments) { |
| 3431 | stack_passed_words += num_reg_arguments - kRegisterPassedArguments; |
| 3432 | } |
| 3433 | return stack_passed_words; |
| 3434 | } |
| 3435 | |
| 3436 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3437 | void MacroAssembler::EmitSeqStringSetCharCheck(Register string, |
| 3438 | Register index, |
| 3439 | Register value, |
| 3440 | uint32_t encoding_mask) { |
| 3441 | Label is_object; |
| 3442 | SmiTst(string); |
| 3443 | Check(ne, kNonObject); |
| 3444 | |
| 3445 | ldr(ip, FieldMemOperand(string, HeapObject::kMapOffset)); |
| 3446 | ldrb(ip, FieldMemOperand(ip, Map::kInstanceTypeOffset)); |
| 3447 | |
| 3448 | and_(ip, ip, Operand(kStringRepresentationMask | kStringEncodingMask)); |
| 3449 | cmp(ip, Operand(encoding_mask)); |
| 3450 | Check(eq, kUnexpectedStringType); |
| 3451 | |
| 3452 | // The index is assumed to be untagged coming in, tag it to compare with the |
| 3453 | // string length without using a temp register, it is restored at the end of |
| 3454 | // this function. |
| 3455 | Label index_tag_ok, index_tag_bad; |
| 3456 | TrySmiTag(index, index, &index_tag_bad); |
| 3457 | b(&index_tag_ok); |
| 3458 | bind(&index_tag_bad); |
| 3459 | Abort(kIndexIsTooLarge); |
| 3460 | bind(&index_tag_ok); |
| 3461 | |
| 3462 | ldr(ip, FieldMemOperand(string, String::kLengthOffset)); |
| 3463 | cmp(index, ip); |
| 3464 | Check(lt, kIndexIsTooLarge); |
| 3465 | |
| 3466 | cmp(index, Operand(Smi::FromInt(0))); |
| 3467 | Check(ge, kIndexIsNegative); |
| 3468 | |
| 3469 | SmiUntag(index, index); |
| 3470 | } |
| 3471 | |
| 3472 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3473 | void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| 3474 | int num_double_arguments, |
| 3475 | Register scratch) { |
| 3476 | int frame_alignment = ActivationFrameAlignment(); |
| 3477 | int stack_passed_arguments = CalculateStackPassedWords( |
| 3478 | num_reg_arguments, num_double_arguments); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3479 | if (frame_alignment > kPointerSize) { |
| 3480 | // Make stack end at alignment and make room for num_arguments - 4 words |
| 3481 | // and the original value of sp. |
| 3482 | mov(scratch, sp); |
| 3483 | sub(sp, sp, Operand((stack_passed_arguments + 1) * kPointerSize)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3484 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3485 | and_(sp, sp, Operand(-frame_alignment)); |
| 3486 | str(scratch, MemOperand(sp, stack_passed_arguments * kPointerSize)); |
| 3487 | } else { |
| 3488 | sub(sp, sp, Operand(stack_passed_arguments * kPointerSize)); |
| 3489 | } |
| 3490 | } |
| 3491 | |
| 3492 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3493 | void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| 3494 | Register scratch) { |
| 3495 | PrepareCallCFunction(num_reg_arguments, 0, scratch); |
| 3496 | } |
| 3497 | |
| 3498 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3499 | void MacroAssembler::MovToFloatParameter(DwVfpRegister src) { |
| 3500 | DCHECK(src.is(d0)); |
| 3501 | if (!use_eabi_hardfloat()) { |
| 3502 | vmov(r0, r1, src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3503 | } |
| 3504 | } |
| 3505 | |
| 3506 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3507 | // On ARM this is just a synonym to make the purpose clear. |
| 3508 | void MacroAssembler::MovToFloatResult(DwVfpRegister src) { |
| 3509 | MovToFloatParameter(src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3510 | } |
| 3511 | |
| 3512 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3513 | void MacroAssembler::MovToFloatParameters(DwVfpRegister src1, |
| 3514 | DwVfpRegister src2) { |
| 3515 | DCHECK(src1.is(d0)); |
| 3516 | DCHECK(src2.is(d1)); |
| 3517 | if (!use_eabi_hardfloat()) { |
| 3518 | vmov(r0, r1, src1); |
| 3519 | vmov(r2, r3, src2); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3520 | } |
| 3521 | } |
| 3522 | |
| 3523 | |
| 3524 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 3525 | int num_reg_arguments, |
| 3526 | int num_double_arguments) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3527 | mov(ip, Operand(function)); |
| 3528 | CallCFunctionHelper(ip, num_reg_arguments, num_double_arguments); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3529 | } |
| 3530 | |
| 3531 | |
| 3532 | void MacroAssembler::CallCFunction(Register function, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3533 | int num_reg_arguments, |
| 3534 | int num_double_arguments) { |
| 3535 | CallCFunctionHelper(function, num_reg_arguments, num_double_arguments); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3536 | } |
| 3537 | |
| 3538 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3539 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 3540 | int num_arguments) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3541 | CallCFunction(function, num_arguments, 0); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3542 | } |
| 3543 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3544 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3545 | void MacroAssembler::CallCFunction(Register function, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3546 | int num_arguments) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3547 | CallCFunction(function, num_arguments, 0); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3548 | } |
| 3549 | |
| 3550 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3551 | void MacroAssembler::CallCFunctionHelper(Register function, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3552 | int num_reg_arguments, |
| 3553 | int num_double_arguments) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3554 | DCHECK(has_frame()); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3555 | // Make sure that the stack is aligned before calling a C function unless |
| 3556 | // running in the simulator. The simulator has its own alignment check which |
| 3557 | // provides more information. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3558 | #if V8_HOST_ARCH_ARM |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3559 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3560 | int frame_alignment = base::OS::ActivationFrameAlignment(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3561 | int frame_alignment_mask = frame_alignment - 1; |
| 3562 | if (frame_alignment > kPointerSize) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3563 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3564 | Label alignment_as_expected; |
| 3565 | tst(sp, Operand(frame_alignment_mask)); |
| 3566 | b(eq, &alignment_as_expected); |
| 3567 | // Don't use Check here, as it will call Runtime_Abort possibly |
| 3568 | // re-entering here. |
| 3569 | stop("Unexpected alignment"); |
| 3570 | bind(&alignment_as_expected); |
| 3571 | } |
| 3572 | } |
| 3573 | #endif |
| 3574 | |
| 3575 | // Just call directly. The function called cannot cause a GC, or |
| 3576 | // allow preemption, so the return address in the link register |
| 3577 | // stays correct. |
| 3578 | Call(function); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3579 | int stack_passed_arguments = CalculateStackPassedWords( |
| 3580 | num_reg_arguments, num_double_arguments); |
| 3581 | if (ActivationFrameAlignment() > kPointerSize) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3582 | ldr(sp, MemOperand(sp, stack_passed_arguments * kPointerSize)); |
| 3583 | } else { |
| 3584 | add(sp, sp, Operand(stack_passed_arguments * sizeof(kPointerSize))); |
| 3585 | } |
| 3586 | } |
| 3587 | |
| 3588 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3589 | void MacroAssembler::GetRelocatedValueLocation(Register ldr_location, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3590 | Register result, |
| 3591 | Register scratch) { |
| 3592 | Label small_constant_pool_load, load_result; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3593 | ldr(result, MemOperand(ldr_location)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3594 | |
| 3595 | if (FLAG_enable_ool_constant_pool) { |
| 3596 | // Check if this is an extended constant pool load. |
| 3597 | and_(scratch, result, Operand(GetConsantPoolLoadMask())); |
| 3598 | teq(scratch, Operand(GetConsantPoolLoadPattern())); |
| 3599 | b(eq, &small_constant_pool_load); |
| 3600 | if (emit_debug_code()) { |
| 3601 | // Check that the instruction sequence is: |
| 3602 | // movw reg, #offset_low |
| 3603 | // movt reg, #offset_high |
| 3604 | // ldr reg, [pp, reg] |
| 3605 | Instr patterns[] = {GetMovWPattern(), GetMovTPattern(), |
| 3606 | GetLdrPpRegOffsetPattern()}; |
| 3607 | for (int i = 0; i < 3; i++) { |
| 3608 | ldr(result, MemOperand(ldr_location, i * kInstrSize)); |
| 3609 | and_(result, result, Operand(patterns[i])); |
| 3610 | cmp(result, Operand(patterns[i])); |
| 3611 | Check(eq, kTheInstructionToPatchShouldBeALoadFromConstantPool); |
| 3612 | } |
| 3613 | // Result was clobbered. Restore it. |
| 3614 | ldr(result, MemOperand(ldr_location)); |
| 3615 | } |
| 3616 | |
| 3617 | // Get the offset into the constant pool. First extract movw immediate into |
| 3618 | // result. |
| 3619 | and_(scratch, result, Operand(0xfff)); |
| 3620 | mov(ip, Operand(result, LSR, 4)); |
| 3621 | and_(ip, ip, Operand(0xf000)); |
| 3622 | orr(result, scratch, Operand(ip)); |
| 3623 | // Then extract movt immediate and or into result. |
| 3624 | ldr(scratch, MemOperand(ldr_location, kInstrSize)); |
| 3625 | and_(ip, scratch, Operand(0xf0000)); |
| 3626 | orr(result, result, Operand(ip, LSL, 12)); |
| 3627 | and_(scratch, scratch, Operand(0xfff)); |
| 3628 | orr(result, result, Operand(scratch, LSL, 16)); |
| 3629 | |
| 3630 | b(&load_result); |
| 3631 | } |
| 3632 | |
| 3633 | bind(&small_constant_pool_load); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3634 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3635 | // Check that the instruction is a ldr reg, [<pc or pp> + offset] . |
| 3636 | and_(result, result, Operand(GetConsantPoolLoadPattern())); |
| 3637 | cmp(result, Operand(GetConsantPoolLoadPattern())); |
| 3638 | Check(eq, kTheInstructionToPatchShouldBeALoadFromConstantPool); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3639 | // Result was clobbered. Restore it. |
| 3640 | ldr(result, MemOperand(ldr_location)); |
| 3641 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3642 | |
| 3643 | // Get the offset into the constant pool. |
| 3644 | const uint32_t kLdrOffsetMask = (1 << 12) - 1; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3645 | and_(result, result, Operand(kLdrOffsetMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3646 | |
| 3647 | bind(&load_result); |
| 3648 | // Get the address of the constant. |
| 3649 | if (FLAG_enable_ool_constant_pool) { |
| 3650 | add(result, pp, Operand(result)); |
| 3651 | } else { |
| 3652 | add(result, ldr_location, Operand(result)); |
| 3653 | add(result, result, Operand(Instruction::kPCReadOffset)); |
| 3654 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3655 | } |
| 3656 | |
| 3657 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3658 | void MacroAssembler::CheckPageFlag( |
| 3659 | Register object, |
| 3660 | Register scratch, |
| 3661 | int mask, |
| 3662 | Condition cc, |
| 3663 | Label* condition_met) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3664 | Bfc(scratch, object, 0, kPageSizeBits); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3665 | ldr(scratch, MemOperand(scratch, MemoryChunk::kFlagsOffset)); |
| 3666 | tst(scratch, Operand(mask)); |
| 3667 | b(cc, condition_met); |
| 3668 | } |
| 3669 | |
| 3670 | |
| 3671 | void MacroAssembler::JumpIfBlack(Register object, |
| 3672 | Register scratch0, |
| 3673 | Register scratch1, |
| 3674 | Label* on_black) { |
| 3675 | HasColor(object, scratch0, scratch1, on_black, 1, 0); // kBlackBitPattern. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3676 | DCHECK(strcmp(Marking::kBlackBitPattern, "10") == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3677 | } |
| 3678 | |
| 3679 | |
| 3680 | void MacroAssembler::HasColor(Register object, |
| 3681 | Register bitmap_scratch, |
| 3682 | Register mask_scratch, |
| 3683 | Label* has_color, |
| 3684 | int first_bit, |
| 3685 | int second_bit) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3686 | DCHECK(!AreAliased(object, bitmap_scratch, mask_scratch, no_reg)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3687 | |
| 3688 | GetMarkBits(object, bitmap_scratch, mask_scratch); |
| 3689 | |
| 3690 | Label other_color, word_boundary; |
| 3691 | ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 3692 | tst(ip, Operand(mask_scratch)); |
| 3693 | b(first_bit == 1 ? eq : ne, &other_color); |
| 3694 | // Shift left 1 by adding. |
| 3695 | add(mask_scratch, mask_scratch, Operand(mask_scratch), SetCC); |
| 3696 | b(eq, &word_boundary); |
| 3697 | tst(ip, Operand(mask_scratch)); |
| 3698 | b(second_bit == 1 ? ne : eq, has_color); |
| 3699 | jmp(&other_color); |
| 3700 | |
| 3701 | bind(&word_boundary); |
| 3702 | ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize + kPointerSize)); |
| 3703 | tst(ip, Operand(1)); |
| 3704 | b(second_bit == 1 ? ne : eq, has_color); |
| 3705 | bind(&other_color); |
| 3706 | } |
| 3707 | |
| 3708 | |
| 3709 | // Detect some, but not all, common pointer-free objects. This is used by the |
| 3710 | // incremental write barrier which doesn't care about oddballs (they are always |
| 3711 | // marked black immediately so this code is not hit). |
| 3712 | void MacroAssembler::JumpIfDataObject(Register value, |
| 3713 | Register scratch, |
| 3714 | Label* not_data_object) { |
| 3715 | Label is_data_object; |
| 3716 | ldr(scratch, FieldMemOperand(value, HeapObject::kMapOffset)); |
| 3717 | CompareRoot(scratch, Heap::kHeapNumberMapRootIndex); |
| 3718 | b(eq, &is_data_object); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3719 | DCHECK(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1); |
| 3720 | DCHECK(kNotStringTag == 0x80 && kIsNotStringMask == 0x80); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3721 | // If it's a string and it's not a cons string then it's an object containing |
| 3722 | // no GC pointers. |
| 3723 | ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| 3724 | tst(scratch, Operand(kIsIndirectStringMask | kIsNotStringMask)); |
| 3725 | b(ne, not_data_object); |
| 3726 | bind(&is_data_object); |
| 3727 | } |
| 3728 | |
| 3729 | |
| 3730 | void MacroAssembler::GetMarkBits(Register addr_reg, |
| 3731 | Register bitmap_reg, |
| 3732 | Register mask_reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3733 | DCHECK(!AreAliased(addr_reg, bitmap_reg, mask_reg, no_reg)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3734 | and_(bitmap_reg, addr_reg, Operand(~Page::kPageAlignmentMask)); |
| 3735 | Ubfx(mask_reg, addr_reg, kPointerSizeLog2, Bitmap::kBitsPerCellLog2); |
| 3736 | const int kLowBits = kPointerSizeLog2 + Bitmap::kBitsPerCellLog2; |
| 3737 | Ubfx(ip, addr_reg, kLowBits, kPageSizeBits - kLowBits); |
| 3738 | add(bitmap_reg, bitmap_reg, Operand(ip, LSL, kPointerSizeLog2)); |
| 3739 | mov(ip, Operand(1)); |
| 3740 | mov(mask_reg, Operand(ip, LSL, mask_reg)); |
| 3741 | } |
| 3742 | |
| 3743 | |
| 3744 | void MacroAssembler::EnsureNotWhite( |
| 3745 | Register value, |
| 3746 | Register bitmap_scratch, |
| 3747 | Register mask_scratch, |
| 3748 | Register load_scratch, |
| 3749 | Label* value_is_white_and_not_data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3750 | DCHECK(!AreAliased(value, bitmap_scratch, mask_scratch, ip)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3751 | GetMarkBits(value, bitmap_scratch, mask_scratch); |
| 3752 | |
| 3753 | // If the value is black or grey we don't need to do anything. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3754 | DCHECK(strcmp(Marking::kWhiteBitPattern, "00") == 0); |
| 3755 | DCHECK(strcmp(Marking::kBlackBitPattern, "10") == 0); |
| 3756 | DCHECK(strcmp(Marking::kGreyBitPattern, "11") == 0); |
| 3757 | DCHECK(strcmp(Marking::kImpossibleBitPattern, "01") == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3758 | |
| 3759 | Label done; |
| 3760 | |
| 3761 | // Since both black and grey have a 1 in the first position and white does |
| 3762 | // not have a 1 there we only need to check one bit. |
| 3763 | ldr(load_scratch, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 3764 | tst(mask_scratch, load_scratch); |
| 3765 | b(ne, &done); |
| 3766 | |
| 3767 | if (emit_debug_code()) { |
| 3768 | // Check for impossible bit pattern. |
| 3769 | Label ok; |
| 3770 | // LSL may overflow, making the check conservative. |
| 3771 | tst(load_scratch, Operand(mask_scratch, LSL, 1)); |
| 3772 | b(eq, &ok); |
| 3773 | stop("Impossible marking bit pattern"); |
| 3774 | bind(&ok); |
| 3775 | } |
| 3776 | |
| 3777 | // Value is white. We check whether it is data that doesn't need scanning. |
| 3778 | // Currently only checks for HeapNumber and non-cons strings. |
| 3779 | Register map = load_scratch; // Holds map while checking type. |
| 3780 | Register length = load_scratch; // Holds length of object after testing type. |
| 3781 | Label is_data_object; |
| 3782 | |
| 3783 | // Check for heap-number |
| 3784 | ldr(map, FieldMemOperand(value, HeapObject::kMapOffset)); |
| 3785 | CompareRoot(map, Heap::kHeapNumberMapRootIndex); |
| 3786 | mov(length, Operand(HeapNumber::kSize), LeaveCC, eq); |
| 3787 | b(eq, &is_data_object); |
| 3788 | |
| 3789 | // Check for strings. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3790 | DCHECK(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1); |
| 3791 | DCHECK(kNotStringTag == 0x80 && kIsNotStringMask == 0x80); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3792 | // If it's a string and it's not a cons string then it's an object containing |
| 3793 | // no GC pointers. |
| 3794 | Register instance_type = load_scratch; |
| 3795 | ldrb(instance_type, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 3796 | tst(instance_type, Operand(kIsIndirectStringMask | kIsNotStringMask)); |
| 3797 | b(ne, value_is_white_and_not_data); |
| 3798 | // It's a non-indirect (non-cons and non-slice) string. |
| 3799 | // If it's external, the length is just ExternalString::kSize. |
| 3800 | // Otherwise it's String::kHeaderSize + string->length() * (1 or 2). |
| 3801 | // External strings are the only ones with the kExternalStringTag bit |
| 3802 | // set. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3803 | DCHECK_EQ(0, kSeqStringTag & kExternalStringTag); |
| 3804 | DCHECK_EQ(0, kConsStringTag & kExternalStringTag); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3805 | tst(instance_type, Operand(kExternalStringTag)); |
| 3806 | mov(length, Operand(ExternalString::kSize), LeaveCC, ne); |
| 3807 | b(ne, &is_data_object); |
| 3808 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3809 | // Sequential string, either Latin1 or UC16. |
| 3810 | // For Latin1 (char-size of 1) we shift the smi tag away to get the length. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3811 | // For UC16 (char-size of 2) we just leave the smi tag in place, thereby |
| 3812 | // getting the length multiplied by 2. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3813 | DCHECK(kOneByteStringTag == 4 && kStringEncodingMask == 4); |
| 3814 | DCHECK(kSmiTag == 0 && kSmiTagSize == 1); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3815 | ldr(ip, FieldMemOperand(value, String::kLengthOffset)); |
| 3816 | tst(instance_type, Operand(kStringEncodingMask)); |
| 3817 | mov(ip, Operand(ip, LSR, 1), LeaveCC, ne); |
| 3818 | add(length, ip, Operand(SeqString::kHeaderSize + kObjectAlignmentMask)); |
| 3819 | and_(length, length, Operand(~kObjectAlignmentMask)); |
| 3820 | |
| 3821 | bind(&is_data_object); |
| 3822 | // Value is a data object, and it is white. Mark it black. Since we know |
| 3823 | // that the object is white we can make it black by flipping one bit. |
| 3824 | ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 3825 | orr(ip, ip, Operand(mask_scratch)); |
| 3826 | str(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 3827 | |
| 3828 | and_(bitmap_scratch, bitmap_scratch, Operand(~Page::kPageAlignmentMask)); |
| 3829 | ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kLiveBytesOffset)); |
| 3830 | add(ip, ip, Operand(length)); |
| 3831 | str(ip, MemOperand(bitmap_scratch, MemoryChunk::kLiveBytesOffset)); |
| 3832 | |
| 3833 | bind(&done); |
| 3834 | } |
| 3835 | |
| 3836 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3837 | void MacroAssembler::ClampUint8(Register output_reg, Register input_reg) { |
| 3838 | Usat(output_reg, 8, Operand(input_reg)); |
| 3839 | } |
| 3840 | |
| 3841 | |
| 3842 | void MacroAssembler::ClampDoubleToUint8(Register result_reg, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3843 | DwVfpRegister input_reg, |
| 3844 | LowDwVfpRegister double_scratch) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3845 | Label done; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3846 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3847 | // Handle inputs >= 255 (including +infinity). |
| 3848 | Vmov(double_scratch, 255.0, result_reg); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3849 | mov(result_reg, Operand(255)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3850 | VFPCompareAndSetFlags(input_reg, double_scratch); |
| 3851 | b(ge, &done); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3852 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3853 | // For inputs < 255 (including negative) vcvt_u32_f64 with round-to-nearest |
| 3854 | // rounding mode will provide the correct result. |
| 3855 | vcvt_u32_f64(double_scratch.low(), input_reg, kFPSCRRounding); |
| 3856 | vmov(result_reg, double_scratch.low()); |
| 3857 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3858 | bind(&done); |
| 3859 | } |
| 3860 | |
| 3861 | |
| 3862 | void MacroAssembler::LoadInstanceDescriptors(Register map, |
| 3863 | Register descriptors) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3864 | ldr(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset)); |
| 3865 | } |
| 3866 | |
| 3867 | |
| 3868 | void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { |
| 3869 | ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| 3870 | DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); |
| 3871 | } |
| 3872 | |
| 3873 | |
| 3874 | void MacroAssembler::EnumLength(Register dst, Register map) { |
| 3875 | STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); |
| 3876 | ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| 3877 | and_(dst, dst, Operand(Map::EnumLengthBits::kMask)); |
| 3878 | SmiTag(dst); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3879 | } |
| 3880 | |
| 3881 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3882 | void MacroAssembler::CheckEnumCache(Register null_value, Label* call_runtime) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3883 | Register empty_fixed_array_value = r6; |
| 3884 | LoadRoot(empty_fixed_array_value, Heap::kEmptyFixedArrayRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3885 | Label next, start; |
| 3886 | mov(r2, r0); |
| 3887 | |
| 3888 | // Check if the enum length field is properly initialized, indicating that |
| 3889 | // there is an enum cache. |
| 3890 | ldr(r1, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| 3891 | |
| 3892 | EnumLength(r3, r1); |
| 3893 | cmp(r3, Operand(Smi::FromInt(kInvalidEnumCacheSentinel))); |
| 3894 | b(eq, call_runtime); |
| 3895 | |
| 3896 | jmp(&start); |
| 3897 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3898 | bind(&next); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3899 | ldr(r1, FieldMemOperand(r2, HeapObject::kMapOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3900 | |
| 3901 | // For all objects but the receiver, check that the cache is empty. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3902 | EnumLength(r3, r1); |
| 3903 | cmp(r3, Operand(Smi::FromInt(0))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3904 | b(ne, call_runtime); |
| 3905 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3906 | bind(&start); |
| 3907 | |
| 3908 | // Check that there are no elements. Register r2 contains the current JS |
| 3909 | // object we've reached through the prototype chain. |
| 3910 | Label no_elements; |
| 3911 | ldr(r2, FieldMemOperand(r2, JSObject::kElementsOffset)); |
| 3912 | cmp(r2, empty_fixed_array_value); |
| 3913 | b(eq, &no_elements); |
| 3914 | |
| 3915 | // Second chance, the object may be using the empty slow element dictionary. |
| 3916 | CompareRoot(r2, Heap::kEmptySlowElementDictionaryRootIndex); |
| 3917 | b(ne, call_runtime); |
| 3918 | |
| 3919 | bind(&no_elements); |
| 3920 | ldr(r2, FieldMemOperand(r1, Map::kPrototypeOffset)); |
| 3921 | cmp(r2, null_value); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3922 | b(ne, &next); |
| 3923 | } |
| 3924 | |
| 3925 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3926 | void MacroAssembler::TestJSArrayForAllocationMemento( |
| 3927 | Register receiver_reg, |
| 3928 | Register scratch_reg, |
| 3929 | Label* no_memento_found) { |
| 3930 | ExternalReference new_space_start = |
| 3931 | ExternalReference::new_space_start(isolate()); |
| 3932 | ExternalReference new_space_allocation_top = |
| 3933 | ExternalReference::new_space_allocation_top_address(isolate()); |
| 3934 | add(scratch_reg, receiver_reg, |
| 3935 | Operand(JSArray::kSize + AllocationMemento::kSize - kHeapObjectTag)); |
| 3936 | cmp(scratch_reg, Operand(new_space_start)); |
| 3937 | b(lt, no_memento_found); |
| 3938 | mov(ip, Operand(new_space_allocation_top)); |
| 3939 | ldr(ip, MemOperand(ip)); |
| 3940 | cmp(scratch_reg, ip); |
| 3941 | b(gt, no_memento_found); |
| 3942 | ldr(scratch_reg, MemOperand(scratch_reg, -AllocationMemento::kSize)); |
| 3943 | cmp(scratch_reg, |
| 3944 | Operand(isolate()->factory()->allocation_memento_map())); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3945 | } |
| 3946 | |
| 3947 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3948 | Register GetRegisterThatIsNotOneOf(Register reg1, |
| 3949 | Register reg2, |
| 3950 | Register reg3, |
| 3951 | Register reg4, |
| 3952 | Register reg5, |
| 3953 | Register reg6) { |
| 3954 | RegList regs = 0; |
| 3955 | if (reg1.is_valid()) regs |= reg1.bit(); |
| 3956 | if (reg2.is_valid()) regs |= reg2.bit(); |
| 3957 | if (reg3.is_valid()) regs |= reg3.bit(); |
| 3958 | if (reg4.is_valid()) regs |= reg4.bit(); |
| 3959 | if (reg5.is_valid()) regs |= reg5.bit(); |
| 3960 | if (reg6.is_valid()) regs |= reg6.bit(); |
| 3961 | |
| 3962 | for (int i = 0; i < Register::NumAllocatableRegisters(); i++) { |
| 3963 | Register candidate = Register::FromAllocationIndex(i); |
| 3964 | if (regs & candidate.bit()) continue; |
| 3965 | return candidate; |
| 3966 | } |
| 3967 | UNREACHABLE(); |
| 3968 | return no_reg; |
| 3969 | } |
| 3970 | |
| 3971 | |
| 3972 | void MacroAssembler::JumpIfDictionaryInPrototypeChain( |
| 3973 | Register object, |
| 3974 | Register scratch0, |
| 3975 | Register scratch1, |
| 3976 | Label* found) { |
| 3977 | DCHECK(!scratch1.is(scratch0)); |
| 3978 | Factory* factory = isolate()->factory(); |
| 3979 | Register current = scratch0; |
| 3980 | Label loop_again; |
| 3981 | |
| 3982 | // scratch contained elements pointer. |
| 3983 | mov(current, object); |
| 3984 | |
| 3985 | // Loop based on the map going up the prototype chain. |
| 3986 | bind(&loop_again); |
| 3987 | ldr(current, FieldMemOperand(current, HeapObject::kMapOffset)); |
| 3988 | ldr(scratch1, FieldMemOperand(current, Map::kBitField2Offset)); |
| 3989 | DecodeField<Map::ElementsKindBits>(scratch1); |
| 3990 | cmp(scratch1, Operand(DICTIONARY_ELEMENTS)); |
| 3991 | b(eq, found); |
| 3992 | ldr(current, FieldMemOperand(current, Map::kPrototypeOffset)); |
| 3993 | cmp(current, Operand(factory->null_value())); |
| 3994 | b(ne, &loop_again); |
| 3995 | } |
| 3996 | |
| 3997 | |
| 3998 | #ifdef DEBUG |
| 3999 | bool AreAliased(Register reg1, |
| 4000 | Register reg2, |
| 4001 | Register reg3, |
| 4002 | Register reg4, |
| 4003 | Register reg5, |
| 4004 | Register reg6, |
| 4005 | Register reg7, |
| 4006 | Register reg8) { |
| 4007 | int n_of_valid_regs = reg1.is_valid() + reg2.is_valid() + |
| 4008 | reg3.is_valid() + reg4.is_valid() + reg5.is_valid() + reg6.is_valid() + |
| 4009 | reg7.is_valid() + reg8.is_valid(); |
| 4010 | |
| 4011 | RegList regs = 0; |
| 4012 | if (reg1.is_valid()) regs |= reg1.bit(); |
| 4013 | if (reg2.is_valid()) regs |= reg2.bit(); |
| 4014 | if (reg3.is_valid()) regs |= reg3.bit(); |
| 4015 | if (reg4.is_valid()) regs |= reg4.bit(); |
| 4016 | if (reg5.is_valid()) regs |= reg5.bit(); |
| 4017 | if (reg6.is_valid()) regs |= reg6.bit(); |
| 4018 | if (reg7.is_valid()) regs |= reg7.bit(); |
| 4019 | if (reg8.is_valid()) regs |= reg8.bit(); |
| 4020 | int n_of_non_aliasing_regs = NumRegs(regs); |
| 4021 | |
| 4022 | return n_of_valid_regs != n_of_non_aliasing_regs; |
| 4023 | } |
| 4024 | #endif |
| 4025 | |
| 4026 | |
| 4027 | CodePatcher::CodePatcher(byte* address, |
| 4028 | int instructions, |
| 4029 | FlushICache flush_cache) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4030 | : address_(address), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4031 | size_(instructions * Assembler::kInstrSize), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4032 | masm_(NULL, address, size_ + Assembler::kGap), |
| 4033 | flush_cache_(flush_cache) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4034 | // Create a new macro assembler pointing to the address of the code to patch. |
| 4035 | // The size is adjusted with kGap on order for the assembler to generate size |
| 4036 | // bytes of instructions without failing with buffer size constraints. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4037 | DCHECK(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4038 | } |
| 4039 | |
| 4040 | |
| 4041 | CodePatcher::~CodePatcher() { |
| 4042 | // Indicate that code has changed. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4043 | if (flush_cache_ == FLUSH) { |
| 4044 | CpuFeatures::FlushICache(address_, size_); |
| 4045 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4046 | |
| 4047 | // Check that the code was patched as expected. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4048 | DCHECK(masm_.pc_ == address_ + size_); |
| 4049 | DCHECK(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4050 | } |
| 4051 | |
| 4052 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4053 | void CodePatcher::Emit(Instr instr) { |
| 4054 | masm()->emit(instr); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4055 | } |
| 4056 | |
| 4057 | |
| 4058 | void CodePatcher::Emit(Address addr) { |
| 4059 | masm()->emit(reinterpret_cast<Instr>(addr)); |
| 4060 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4061 | |
| 4062 | |
| 4063 | void CodePatcher::EmitCondition(Condition cond) { |
| 4064 | Instr instr = Assembler::instr_at(masm_.pc_); |
| 4065 | instr = (instr & ~kCondMask) | cond; |
| 4066 | masm_.emit(instr); |
| 4067 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4068 | |
| 4069 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4070 | void MacroAssembler::TruncatingDiv(Register result, |
| 4071 | Register dividend, |
| 4072 | int32_t divisor) { |
| 4073 | DCHECK(!dividend.is(result)); |
| 4074 | DCHECK(!dividend.is(ip)); |
| 4075 | DCHECK(!result.is(ip)); |
| 4076 | base::MagicNumbersForDivision<uint32_t> mag = |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 4077 | base::SignedDivisionByConstant(bit_cast<uint32_t>(divisor)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4078 | mov(ip, Operand(mag.multiplier)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 4079 | bool neg = (mag.multiplier & (1U << 31)) != 0; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4080 | if (divisor > 0 && neg) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 4081 | smmla(result, dividend, ip, dividend); |
| 4082 | } else { |
| 4083 | smmul(result, dividend, ip); |
| 4084 | if (divisor < 0 && !neg && mag.multiplier > 0) { |
| 4085 | sub(result, result, Operand(dividend)); |
| 4086 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4087 | } |
| 4088 | if (mag.shift > 0) mov(result, Operand(result, ASR, mag.shift)); |
| 4089 | add(result, result, Operand(dividend, LSR, 31)); |
| 4090 | } |
| 4091 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 4092 | } // namespace internal |
| 4093 | } // namespace v8 |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 4094 | |
| 4095 | #endif // V8_TARGET_ARCH_ARM |