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 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5 | #if V8_TARGET_ARCH_IA32 |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 6 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 7 | #include "src/base/bits.h" |
| 8 | #include "src/base/division-by-constant.h" |
| 9 | #include "src/bootstrapper.h" |
| 10 | #include "src/codegen.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 11 | #include "src/debug/debug.h" |
| 12 | #include "src/ia32/frames-ia32.h" |
| 13 | #include "src/ia32/macro-assembler-ia32.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 14 | #include "src/runtime/runtime.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 15 | |
| 16 | namespace v8 { |
| 17 | namespace internal { |
| 18 | |
| 19 | // ------------------------------------------------------------------------- |
| 20 | // MacroAssembler implementation. |
| 21 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 22 | MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size, |
| 23 | CodeObjectRequired create_code_object) |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 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 | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 27 | if (create_code_object == CodeObjectRequired::kYes) { |
| 28 | code_object_ = |
| 29 | Handle<Object>::New(isolate()->heap()->undefined_value(), isolate()); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 30 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 31 | } |
| 32 | |
| 33 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 34 | void MacroAssembler::Load(Register dst, const Operand& src, Representation r) { |
| 35 | DCHECK(!r.IsDouble()); |
| 36 | if (r.IsInteger8()) { |
| 37 | movsx_b(dst, src); |
| 38 | } else if (r.IsUInteger8()) { |
| 39 | movzx_b(dst, src); |
| 40 | } else if (r.IsInteger16()) { |
| 41 | movsx_w(dst, src); |
| 42 | } else if (r.IsUInteger16()) { |
| 43 | movzx_w(dst, src); |
| 44 | } else { |
| 45 | mov(dst, src); |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | |
| 50 | void MacroAssembler::Store(Register src, const Operand& dst, Representation r) { |
| 51 | DCHECK(!r.IsDouble()); |
| 52 | if (r.IsInteger8() || r.IsUInteger8()) { |
| 53 | mov_b(dst, src); |
| 54 | } else if (r.IsInteger16() || r.IsUInteger16()) { |
| 55 | mov_w(dst, src); |
| 56 | } else { |
| 57 | if (r.IsHeapObject()) { |
| 58 | AssertNotSmi(src); |
| 59 | } else if (r.IsSmi()) { |
| 60 | AssertSmi(src); |
| 61 | } |
| 62 | mov(dst, src); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | |
| 67 | void MacroAssembler::LoadRoot(Register destination, Heap::RootListIndex index) { |
| 68 | if (isolate()->heap()->RootCanBeTreatedAsConstant(index)) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 69 | mov(destination, isolate()->heap()->root_handle(index)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 70 | return; |
| 71 | } |
| 72 | ExternalReference roots_array_start = |
| 73 | ExternalReference::roots_array_start(isolate()); |
| 74 | mov(destination, Immediate(index)); |
| 75 | mov(destination, Operand::StaticArray(destination, |
| 76 | times_pointer_size, |
| 77 | roots_array_start)); |
| 78 | } |
| 79 | |
| 80 | |
| 81 | void MacroAssembler::StoreRoot(Register source, |
| 82 | Register scratch, |
| 83 | Heap::RootListIndex index) { |
| 84 | DCHECK(Heap::RootCanBeWrittenAfterInitialization(index)); |
| 85 | ExternalReference roots_array_start = |
| 86 | ExternalReference::roots_array_start(isolate()); |
| 87 | mov(scratch, Immediate(index)); |
| 88 | mov(Operand::StaticArray(scratch, times_pointer_size, roots_array_start), |
| 89 | source); |
| 90 | } |
| 91 | |
| 92 | |
| 93 | void MacroAssembler::CompareRoot(Register with, |
| 94 | Register scratch, |
| 95 | Heap::RootListIndex index) { |
| 96 | ExternalReference roots_array_start = |
| 97 | ExternalReference::roots_array_start(isolate()); |
| 98 | mov(scratch, Immediate(index)); |
| 99 | cmp(with, Operand::StaticArray(scratch, |
| 100 | times_pointer_size, |
| 101 | roots_array_start)); |
| 102 | } |
| 103 | |
| 104 | |
| 105 | void MacroAssembler::CompareRoot(Register with, Heap::RootListIndex index) { |
| 106 | DCHECK(isolate()->heap()->RootCanBeTreatedAsConstant(index)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 107 | cmp(with, isolate()->heap()->root_handle(index)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | |
| 111 | void MacroAssembler::CompareRoot(const Operand& with, |
| 112 | Heap::RootListIndex index) { |
| 113 | DCHECK(isolate()->heap()->RootCanBeTreatedAsConstant(index)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 114 | cmp(with, isolate()->heap()->root_handle(index)); |
| 115 | } |
| 116 | |
| 117 | |
| 118 | void MacroAssembler::PushRoot(Heap::RootListIndex index) { |
| 119 | DCHECK(isolate()->heap()->RootCanBeTreatedAsConstant(index)); |
| 120 | Push(isolate()->heap()->root_handle(index)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 121 | } |
| 122 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 123 | #define REG(Name) \ |
| 124 | { Register::kCode_##Name } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 125 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 126 | static const Register saved_regs[] = {REG(eax), REG(ecx), REG(edx)}; |
| 127 | |
| 128 | #undef REG |
| 129 | |
| 130 | static const int kNumberOfSavedRegs = sizeof(saved_regs) / sizeof(Register); |
| 131 | |
| 132 | void MacroAssembler::PushCallerSaved(SaveFPRegsMode fp_mode, |
| 133 | Register exclusion1, Register exclusion2, |
| 134 | Register exclusion3) { |
| 135 | // We don't allow a GC during a store buffer overflow so there is no need to |
| 136 | // store the registers in any particular way, but we do have to store and |
| 137 | // restore them. |
| 138 | for (int i = 0; i < kNumberOfSavedRegs; i++) { |
| 139 | Register reg = saved_regs[i]; |
| 140 | if (!reg.is(exclusion1) && !reg.is(exclusion2) && !reg.is(exclusion3)) { |
| 141 | push(reg); |
| 142 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 143 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 144 | if (fp_mode == kSaveFPRegs) { |
| 145 | sub(esp, Immediate(kDoubleSize * (XMMRegister::kMaxNumRegisters - 1))); |
| 146 | // Save all XMM registers except XMM0. |
| 147 | for (int i = XMMRegister::kMaxNumRegisters - 1; i > 0; i--) { |
| 148 | XMMRegister reg = XMMRegister::from_code(i); |
| 149 | movsd(Operand(esp, (i - 1) * kDoubleSize), reg); |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | void MacroAssembler::PopCallerSaved(SaveFPRegsMode fp_mode, Register exclusion1, |
| 155 | Register exclusion2, Register exclusion3) { |
| 156 | if (fp_mode == kSaveFPRegs) { |
| 157 | // Restore all XMM registers except XMM0. |
| 158 | for (int i = XMMRegister::kMaxNumRegisters - 1; i > 0; i--) { |
| 159 | XMMRegister reg = XMMRegister::from_code(i); |
| 160 | movsd(reg, Operand(esp, (i - 1) * kDoubleSize)); |
| 161 | } |
| 162 | add(esp, Immediate(kDoubleSize * (XMMRegister::kMaxNumRegisters - 1))); |
| 163 | } |
| 164 | |
| 165 | for (int i = kNumberOfSavedRegs - 1; i >= 0; i--) { |
| 166 | Register reg = saved_regs[i]; |
| 167 | if (!reg.is(exclusion1) && !reg.is(exclusion2) && !reg.is(exclusion3)) { |
| 168 | pop(reg); |
| 169 | } |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | void MacroAssembler::InNewSpace(Register object, Register scratch, Condition cc, |
| 174 | Label* condition_met, |
| 175 | Label::Distance distance) { |
| 176 | const int mask = |
| 177 | (1 << MemoryChunk::IN_FROM_SPACE) | (1 << MemoryChunk::IN_TO_SPACE); |
| 178 | CheckPageFlag(object, scratch, mask, cc, condition_met, distance); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 179 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 180 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 181 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 182 | void MacroAssembler::RememberedSetHelper( |
| 183 | Register object, // Only used for debug checks. |
| 184 | Register addr, |
| 185 | Register scratch, |
| 186 | SaveFPRegsMode save_fp, |
| 187 | MacroAssembler::RememberedSetFinalAction and_then) { |
| 188 | Label done; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 189 | if (emit_debug_code()) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 190 | Label ok; |
| 191 | JumpIfNotInNewSpace(object, scratch, &ok, Label::kNear); |
| 192 | int3(); |
| 193 | bind(&ok); |
| 194 | } |
| 195 | // Load store buffer top. |
| 196 | ExternalReference store_buffer = |
| 197 | ExternalReference::store_buffer_top(isolate()); |
| 198 | mov(scratch, Operand::StaticVariable(store_buffer)); |
| 199 | // Store pointer to buffer. |
| 200 | mov(Operand(scratch, 0), addr); |
| 201 | // Increment buffer top. |
| 202 | add(scratch, Immediate(kPointerSize)); |
| 203 | // Write back new top of buffer. |
| 204 | mov(Operand::StaticVariable(store_buffer), scratch); |
| 205 | // Call stub on end of buffer. |
| 206 | // Check for end of buffer. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 207 | test(scratch, Immediate(StoreBuffer::kStoreBufferMask)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 208 | if (and_then == kReturnAtEnd) { |
| 209 | Label buffer_overflowed; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 210 | j(equal, &buffer_overflowed, Label::kNear); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 211 | ret(0); |
| 212 | bind(&buffer_overflowed); |
| 213 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 214 | DCHECK(and_then == kFallThroughAtEnd); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 215 | j(not_equal, &done, Label::kNear); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 216 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 217 | StoreBufferOverflowStub store_buffer_overflow(isolate(), save_fp); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 218 | CallStub(&store_buffer_overflow); |
| 219 | if (and_then == kReturnAtEnd) { |
| 220 | ret(0); |
| 221 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 222 | DCHECK(and_then == kFallThroughAtEnd); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 223 | bind(&done); |
| 224 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | |
| 228 | void MacroAssembler::ClampDoubleToUint8(XMMRegister input_reg, |
| 229 | XMMRegister scratch_reg, |
| 230 | Register result_reg) { |
| 231 | Label done; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 232 | Label conv_failure; |
| 233 | xorps(scratch_reg, scratch_reg); |
| 234 | cvtsd2si(result_reg, input_reg); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 235 | test(result_reg, Immediate(0xFFFFFF00)); |
| 236 | j(zero, &done, Label::kNear); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 237 | cmp(result_reg, Immediate(0x1)); |
| 238 | j(overflow, &conv_failure, Label::kNear); |
| 239 | mov(result_reg, Immediate(0)); |
| 240 | setcc(sign, result_reg); |
| 241 | sub(result_reg, Immediate(1)); |
| 242 | and_(result_reg, Immediate(255)); |
| 243 | jmp(&done, Label::kNear); |
| 244 | bind(&conv_failure); |
| 245 | Move(result_reg, Immediate(0)); |
| 246 | ucomisd(input_reg, scratch_reg); |
| 247 | j(below, &done, Label::kNear); |
| 248 | Move(result_reg, Immediate(255)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 249 | bind(&done); |
| 250 | } |
| 251 | |
| 252 | |
| 253 | void MacroAssembler::ClampUint8(Register reg) { |
| 254 | Label done; |
| 255 | test(reg, Immediate(0xFFFFFF00)); |
| 256 | j(zero, &done, Label::kNear); |
| 257 | setcc(negative, reg); // 1 if negative, 0 if positive. |
| 258 | dec_b(reg); // 0 if negative, 255 if positive. |
| 259 | bind(&done); |
| 260 | } |
| 261 | |
| 262 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 263 | void MacroAssembler::SlowTruncateToI(Register result_reg, |
| 264 | Register input_reg, |
| 265 | int offset) { |
| 266 | DoubleToIStub stub(isolate(), input_reg, result_reg, offset, true); |
| 267 | call(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 268 | } |
| 269 | |
| 270 | |
| 271 | void MacroAssembler::TruncateDoubleToI(Register result_reg, |
| 272 | XMMRegister input_reg) { |
| 273 | Label done; |
| 274 | cvttsd2si(result_reg, Operand(input_reg)); |
| 275 | cmp(result_reg, 0x1); |
| 276 | j(no_overflow, &done, Label::kNear); |
| 277 | |
| 278 | sub(esp, Immediate(kDoubleSize)); |
| 279 | movsd(MemOperand(esp, 0), input_reg); |
| 280 | SlowTruncateToI(result_reg, esp, 0); |
| 281 | add(esp, Immediate(kDoubleSize)); |
| 282 | bind(&done); |
| 283 | } |
| 284 | |
| 285 | |
| 286 | void MacroAssembler::DoubleToI(Register result_reg, XMMRegister input_reg, |
| 287 | XMMRegister scratch, |
| 288 | MinusZeroMode minus_zero_mode, |
| 289 | Label* lost_precision, Label* is_nan, |
| 290 | Label* minus_zero, Label::Distance dst) { |
| 291 | DCHECK(!input_reg.is(scratch)); |
| 292 | cvttsd2si(result_reg, Operand(input_reg)); |
| 293 | Cvtsi2sd(scratch, Operand(result_reg)); |
| 294 | ucomisd(scratch, input_reg); |
| 295 | j(not_equal, lost_precision, dst); |
| 296 | j(parity_even, is_nan, dst); |
| 297 | if (minus_zero_mode == FAIL_ON_MINUS_ZERO) { |
| 298 | Label done; |
| 299 | // The integer converted back is equal to the original. We |
| 300 | // only have to test if we got -0 as an input. |
| 301 | test(result_reg, Operand(result_reg)); |
| 302 | j(not_zero, &done, Label::kNear); |
| 303 | movmskpd(result_reg, input_reg); |
| 304 | // Bit 0 contains the sign of the double in input_reg. |
| 305 | // If input was positive, we are ok and return 0, otherwise |
| 306 | // jump to minus_zero. |
| 307 | and_(result_reg, 1); |
| 308 | j(not_zero, minus_zero, dst); |
| 309 | bind(&done); |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | |
| 314 | void MacroAssembler::TruncateHeapNumberToI(Register result_reg, |
| 315 | Register input_reg) { |
| 316 | Label done, slow_case; |
| 317 | |
| 318 | if (CpuFeatures::IsSupported(SSE3)) { |
| 319 | CpuFeatureScope scope(this, SSE3); |
| 320 | Label convert; |
| 321 | // Use more powerful conversion when sse3 is available. |
| 322 | // Load x87 register with heap number. |
| 323 | fld_d(FieldOperand(input_reg, HeapNumber::kValueOffset)); |
| 324 | // Get exponent alone and check for too-big exponent. |
| 325 | mov(result_reg, FieldOperand(input_reg, HeapNumber::kExponentOffset)); |
| 326 | and_(result_reg, HeapNumber::kExponentMask); |
| 327 | const uint32_t kTooBigExponent = |
| 328 | (HeapNumber::kExponentBias + 63) << HeapNumber::kExponentShift; |
| 329 | cmp(Operand(result_reg), Immediate(kTooBigExponent)); |
| 330 | j(greater_equal, &slow_case, Label::kNear); |
| 331 | |
| 332 | // Reserve space for 64 bit answer. |
| 333 | sub(Operand(esp), Immediate(kDoubleSize)); |
| 334 | // Do conversion, which cannot fail because we checked the exponent. |
| 335 | fisttp_d(Operand(esp, 0)); |
| 336 | mov(result_reg, Operand(esp, 0)); // Low word of answer is the result. |
| 337 | add(Operand(esp), Immediate(kDoubleSize)); |
| 338 | jmp(&done, Label::kNear); |
| 339 | |
| 340 | // Slow case. |
| 341 | bind(&slow_case); |
| 342 | if (input_reg.is(result_reg)) { |
| 343 | // Input is clobbered. Restore number from fpu stack |
| 344 | sub(Operand(esp), Immediate(kDoubleSize)); |
| 345 | fstp_d(Operand(esp, 0)); |
| 346 | SlowTruncateToI(result_reg, esp, 0); |
| 347 | add(esp, Immediate(kDoubleSize)); |
| 348 | } else { |
| 349 | fstp(0); |
| 350 | SlowTruncateToI(result_reg, input_reg); |
| 351 | } |
| 352 | } else { |
| 353 | movsd(xmm0, FieldOperand(input_reg, HeapNumber::kValueOffset)); |
| 354 | cvttsd2si(result_reg, Operand(xmm0)); |
| 355 | cmp(result_reg, 0x1); |
| 356 | j(no_overflow, &done, Label::kNear); |
| 357 | // Check if the input was 0x8000000 (kMinInt). |
| 358 | // If no, then we got an overflow and we deoptimize. |
| 359 | ExternalReference min_int = ExternalReference::address_of_min_int(); |
| 360 | ucomisd(xmm0, Operand::StaticVariable(min_int)); |
| 361 | j(not_equal, &slow_case, Label::kNear); |
| 362 | j(parity_even, &slow_case, Label::kNear); // NaN. |
| 363 | jmp(&done, Label::kNear); |
| 364 | |
| 365 | // Slow case. |
| 366 | bind(&slow_case); |
| 367 | if (input_reg.is(result_reg)) { |
| 368 | // Input is clobbered. Restore number from double scratch. |
| 369 | sub(esp, Immediate(kDoubleSize)); |
| 370 | movsd(MemOperand(esp, 0), xmm0); |
| 371 | SlowTruncateToI(result_reg, esp, 0); |
| 372 | add(esp, Immediate(kDoubleSize)); |
| 373 | } else { |
| 374 | SlowTruncateToI(result_reg, input_reg); |
| 375 | } |
| 376 | } |
| 377 | bind(&done); |
| 378 | } |
| 379 | |
| 380 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 381 | void MacroAssembler::LoadUint32(XMMRegister dst, const Operand& src) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 382 | Label done; |
| 383 | cmp(src, Immediate(0)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 384 | ExternalReference uint32_bias = ExternalReference::address_of_uint32_bias(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 385 | Cvtsi2sd(dst, src); |
| 386 | j(not_sign, &done, Label::kNear); |
| 387 | addsd(dst, Operand::StaticVariable(uint32_bias)); |
| 388 | bind(&done); |
| 389 | } |
| 390 | |
| 391 | |
| 392 | void MacroAssembler::RecordWriteArray( |
| 393 | Register object, |
| 394 | Register value, |
| 395 | Register index, |
| 396 | SaveFPRegsMode save_fp, |
| 397 | RememberedSetAction remembered_set_action, |
| 398 | SmiCheck smi_check, |
| 399 | PointersToHereCheck pointers_to_here_check_for_value) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 400 | // First, check if a write barrier is even needed. The tests below |
| 401 | // catch stores of Smis. |
| 402 | Label done; |
| 403 | |
| 404 | // Skip barrier if writing a smi. |
| 405 | if (smi_check == INLINE_SMI_CHECK) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 406 | DCHECK_EQ(0, kSmiTag); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 407 | test(value, Immediate(kSmiTagMask)); |
| 408 | j(zero, &done); |
| 409 | } |
| 410 | |
| 411 | // Array access: calculate the destination address in the same manner as |
| 412 | // KeyedStoreIC::GenerateGeneric. Multiply a smi by 2 to get an offset |
| 413 | // into an array of words. |
| 414 | Register dst = index; |
| 415 | lea(dst, Operand(object, index, times_half_pointer_size, |
| 416 | FixedArray::kHeaderSize - kHeapObjectTag)); |
| 417 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 418 | RecordWrite(object, dst, value, save_fp, remembered_set_action, |
| 419 | OMIT_SMI_CHECK, pointers_to_here_check_for_value); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 420 | |
| 421 | bind(&done); |
| 422 | |
| 423 | // Clobber clobbered input registers when running with the debug-code flag |
| 424 | // turned on to provoke errors. |
| 425 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 426 | mov(value, Immediate(bit_cast<int32_t>(kZapValue))); |
| 427 | mov(index, Immediate(bit_cast<int32_t>(kZapValue))); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 428 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 432 | void MacroAssembler::RecordWriteField( |
| 433 | Register object, |
| 434 | int offset, |
| 435 | Register value, |
| 436 | Register dst, |
| 437 | SaveFPRegsMode save_fp, |
| 438 | RememberedSetAction remembered_set_action, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 439 | SmiCheck smi_check, |
| 440 | PointersToHereCheck pointers_to_here_check_for_value) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 441 | // First, check if a write barrier is even needed. The tests below |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 442 | // catch stores of Smis. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 443 | Label done; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 444 | |
| 445 | // Skip barrier if writing a smi. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 446 | if (smi_check == INLINE_SMI_CHECK) { |
| 447 | JumpIfSmi(value, &done, Label::kNear); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 448 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 449 | |
| 450 | // Although the object register is tagged, the offset is relative to the start |
| 451 | // of the object, so so offset must be a multiple of kPointerSize. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 452 | DCHECK(IsAligned(offset, kPointerSize)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 453 | |
| 454 | lea(dst, FieldOperand(object, offset)); |
| 455 | if (emit_debug_code()) { |
| 456 | Label ok; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 457 | test_b(dst, Immediate((1 << kPointerSizeLog2) - 1)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 458 | j(zero, &ok, Label::kNear); |
| 459 | int3(); |
| 460 | bind(&ok); |
| 461 | } |
| 462 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 463 | RecordWrite(object, dst, value, save_fp, remembered_set_action, |
| 464 | OMIT_SMI_CHECK, pointers_to_here_check_for_value); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 465 | |
| 466 | bind(&done); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 467 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 468 | // Clobber clobbered input registers when running with the debug-code flag |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 469 | // turned on to provoke errors. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 470 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 471 | mov(value, Immediate(bit_cast<int32_t>(kZapValue))); |
| 472 | mov(dst, Immediate(bit_cast<int32_t>(kZapValue))); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 473 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 477 | void MacroAssembler::RecordWriteForMap( |
| 478 | Register object, |
| 479 | Handle<Map> map, |
| 480 | Register scratch1, |
| 481 | Register scratch2, |
| 482 | SaveFPRegsMode save_fp) { |
| 483 | Label done; |
| 484 | |
| 485 | Register address = scratch1; |
| 486 | Register value = scratch2; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 487 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 488 | Label ok; |
| 489 | lea(address, FieldOperand(object, HeapObject::kMapOffset)); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 490 | test_b(address, Immediate((1 << kPointerSizeLog2) - 1)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 491 | j(zero, &ok, Label::kNear); |
| 492 | int3(); |
| 493 | bind(&ok); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 494 | } |
| 495 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 496 | DCHECK(!object.is(value)); |
| 497 | DCHECK(!object.is(address)); |
| 498 | DCHECK(!value.is(address)); |
| 499 | AssertNotSmi(object); |
| 500 | |
| 501 | if (!FLAG_incremental_marking) { |
| 502 | return; |
| 503 | } |
| 504 | |
| 505 | // Compute the address. |
| 506 | lea(address, FieldOperand(object, HeapObject::kMapOffset)); |
| 507 | |
| 508 | // A single check of the map's pages interesting flag suffices, since it is |
| 509 | // only set during incremental collection, and then it's also guaranteed that |
| 510 | // the from object's page's interesting flag is also set. This optimization |
| 511 | // relies on the fact that maps can never be in new space. |
| 512 | DCHECK(!isolate()->heap()->InNewSpace(*map)); |
| 513 | CheckPageFlagForMap(map, |
| 514 | MemoryChunk::kPointersToHereAreInterestingMask, |
| 515 | zero, |
| 516 | &done, |
| 517 | Label::kNear); |
| 518 | |
| 519 | RecordWriteStub stub(isolate(), object, value, address, OMIT_REMEMBERED_SET, |
| 520 | save_fp); |
| 521 | CallStub(&stub); |
| 522 | |
| 523 | bind(&done); |
| 524 | |
| 525 | // Count number of write barriers in generated code. |
| 526 | isolate()->counters()->write_barriers_static()->Increment(); |
| 527 | IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1); |
| 528 | |
| 529 | // Clobber clobbered input registers when running with the debug-code flag |
| 530 | // turned on to provoke errors. |
| 531 | if (emit_debug_code()) { |
| 532 | mov(value, Immediate(bit_cast<int32_t>(kZapValue))); |
| 533 | mov(scratch1, Immediate(bit_cast<int32_t>(kZapValue))); |
| 534 | mov(scratch2, Immediate(bit_cast<int32_t>(kZapValue))); |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | |
| 539 | void MacroAssembler::RecordWrite( |
| 540 | Register object, |
| 541 | Register address, |
| 542 | Register value, |
| 543 | SaveFPRegsMode fp_mode, |
| 544 | RememberedSetAction remembered_set_action, |
| 545 | SmiCheck smi_check, |
| 546 | PointersToHereCheck pointers_to_here_check_for_value) { |
| 547 | DCHECK(!object.is(value)); |
| 548 | DCHECK(!object.is(address)); |
| 549 | DCHECK(!value.is(address)); |
| 550 | AssertNotSmi(object); |
| 551 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 552 | if (remembered_set_action == OMIT_REMEMBERED_SET && |
| 553 | !FLAG_incremental_marking) { |
| 554 | return; |
| 555 | } |
| 556 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 557 | if (emit_debug_code()) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 558 | Label ok; |
| 559 | cmp(value, Operand(address, 0)); |
| 560 | j(equal, &ok, Label::kNear); |
| 561 | int3(); |
| 562 | bind(&ok); |
| 563 | } |
| 564 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 565 | // First, check if a write barrier is even needed. The tests below |
| 566 | // catch stores of Smis and stores into young gen. |
| 567 | Label done; |
| 568 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 569 | if (smi_check == INLINE_SMI_CHECK) { |
| 570 | // Skip barrier if writing a smi. |
| 571 | JumpIfSmi(value, &done, Label::kNear); |
| 572 | } |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 573 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 574 | if (pointers_to_here_check_for_value != kPointersToHereAreAlwaysInteresting) { |
| 575 | CheckPageFlag(value, |
| 576 | value, // Used as scratch. |
| 577 | MemoryChunk::kPointersToHereAreInterestingMask, |
| 578 | zero, |
| 579 | &done, |
| 580 | Label::kNear); |
| 581 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 582 | CheckPageFlag(object, |
| 583 | value, // Used as scratch. |
| 584 | MemoryChunk::kPointersFromHereAreInterestingMask, |
| 585 | zero, |
| 586 | &done, |
| 587 | Label::kNear); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 588 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 589 | RecordWriteStub stub(isolate(), object, value, address, remembered_set_action, |
| 590 | fp_mode); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 591 | CallStub(&stub); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 592 | |
| 593 | bind(&done); |
| 594 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 595 | // Count number of write barriers in generated code. |
| 596 | isolate()->counters()->write_barriers_static()->Increment(); |
| 597 | IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1); |
| 598 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 599 | // Clobber clobbered registers when running with the debug-code flag |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 600 | // turned on to provoke errors. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 601 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 602 | mov(address, Immediate(bit_cast<int32_t>(kZapValue))); |
| 603 | mov(value, Immediate(bit_cast<int32_t>(kZapValue))); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 604 | } |
| 605 | } |
| 606 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 607 | void MacroAssembler::RecordWriteCodeEntryField(Register js_function, |
| 608 | Register code_entry, |
| 609 | Register scratch) { |
| 610 | const int offset = JSFunction::kCodeEntryOffset; |
| 611 | |
| 612 | // Since a code entry (value) is always in old space, we don't need to update |
| 613 | // remembered set. If incremental marking is off, there is nothing for us to |
| 614 | // do. |
| 615 | if (!FLAG_incremental_marking) return; |
| 616 | |
| 617 | DCHECK(!js_function.is(code_entry)); |
| 618 | DCHECK(!js_function.is(scratch)); |
| 619 | DCHECK(!code_entry.is(scratch)); |
| 620 | AssertNotSmi(js_function); |
| 621 | |
| 622 | if (emit_debug_code()) { |
| 623 | Label ok; |
| 624 | lea(scratch, FieldOperand(js_function, offset)); |
| 625 | cmp(code_entry, Operand(scratch, 0)); |
| 626 | j(equal, &ok, Label::kNear); |
| 627 | int3(); |
| 628 | bind(&ok); |
| 629 | } |
| 630 | |
| 631 | // First, check if a write barrier is even needed. The tests below |
| 632 | // catch stores of Smis and stores into young gen. |
| 633 | Label done; |
| 634 | |
| 635 | CheckPageFlag(code_entry, scratch, |
| 636 | MemoryChunk::kPointersToHereAreInterestingMask, zero, &done, |
| 637 | Label::kNear); |
| 638 | CheckPageFlag(js_function, scratch, |
| 639 | MemoryChunk::kPointersFromHereAreInterestingMask, zero, &done, |
| 640 | Label::kNear); |
| 641 | |
| 642 | // Save input registers. |
| 643 | push(js_function); |
| 644 | push(code_entry); |
| 645 | |
| 646 | const Register dst = scratch; |
| 647 | lea(dst, FieldOperand(js_function, offset)); |
| 648 | |
| 649 | // Save caller-saved registers. |
| 650 | PushCallerSaved(kDontSaveFPRegs, js_function, code_entry); |
| 651 | |
| 652 | int argument_count = 3; |
| 653 | PrepareCallCFunction(argument_count, code_entry); |
| 654 | mov(Operand(esp, 0 * kPointerSize), js_function); |
| 655 | mov(Operand(esp, 1 * kPointerSize), dst); // Slot. |
| 656 | mov(Operand(esp, 2 * kPointerSize), |
| 657 | Immediate(ExternalReference::isolate_address(isolate()))); |
| 658 | |
| 659 | { |
| 660 | AllowExternalCallThatCantCauseGC scope(this); |
| 661 | CallCFunction( |
| 662 | ExternalReference::incremental_marking_record_write_code_entry_function( |
| 663 | isolate()), |
| 664 | argument_count); |
| 665 | } |
| 666 | |
| 667 | // Restore caller-saved registers. |
| 668 | PopCallerSaved(kDontSaveFPRegs, js_function, code_entry); |
| 669 | |
| 670 | // Restore input registers. |
| 671 | pop(code_entry); |
| 672 | pop(js_function); |
| 673 | |
| 674 | bind(&done); |
| 675 | } |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 676 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 677 | void MacroAssembler::DebugBreak() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 678 | Move(eax, Immediate(0)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 679 | mov(ebx, Immediate(ExternalReference(Runtime::kHandleDebuggerStatement, |
| 680 | isolate()))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 681 | CEntryStub ces(isolate(), 1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 682 | call(ces.GetCode(), RelocInfo::DEBUGGER_STATEMENT); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 683 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 684 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 685 | void MacroAssembler::Cvtsi2sd(XMMRegister dst, const Operand& src) { |
| 686 | xorps(dst, dst); |
| 687 | cvtsi2sd(dst, src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 688 | } |
| 689 | |
| 690 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 691 | void MacroAssembler::Cvtui2ss(XMMRegister dst, Register src, Register tmp) { |
| 692 | Label msb_set_src; |
| 693 | Label jmp_return; |
| 694 | test(src, src); |
| 695 | j(sign, &msb_set_src, Label::kNear); |
| 696 | cvtsi2ss(dst, src); |
| 697 | jmp(&jmp_return, Label::kNear); |
| 698 | bind(&msb_set_src); |
| 699 | mov(tmp, src); |
| 700 | shr(src, 1); |
| 701 | // Recover the least significant bit to avoid rounding errors. |
| 702 | and_(tmp, Immediate(1)); |
| 703 | or_(src, tmp); |
| 704 | cvtsi2ss(dst, src); |
| 705 | addss(dst, dst); |
| 706 | bind(&jmp_return); |
| 707 | } |
| 708 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 709 | void MacroAssembler::ShlPair(Register high, Register low, uint8_t shift) { |
| 710 | if (shift >= 32) { |
| 711 | mov(high, low); |
| 712 | shl(high, shift - 32); |
| 713 | xor_(low, low); |
| 714 | } else { |
| 715 | shld(high, low, shift); |
| 716 | shl(low, shift); |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | void MacroAssembler::ShlPair_cl(Register high, Register low) { |
| 721 | shld_cl(high, low); |
| 722 | shl_cl(low); |
| 723 | Label done; |
| 724 | test(ecx, Immediate(0x20)); |
| 725 | j(equal, &done, Label::kNear); |
| 726 | mov(high, low); |
| 727 | xor_(low, low); |
| 728 | bind(&done); |
| 729 | } |
| 730 | |
| 731 | void MacroAssembler::ShrPair(Register high, Register low, uint8_t shift) { |
| 732 | if (shift >= 32) { |
| 733 | mov(low, high); |
| 734 | shr(low, shift - 32); |
| 735 | xor_(high, high); |
| 736 | } else { |
| 737 | shrd(high, low, shift); |
| 738 | shr(high, shift); |
| 739 | } |
| 740 | } |
| 741 | |
| 742 | void MacroAssembler::ShrPair_cl(Register high, Register low) { |
| 743 | shrd_cl(low, high); |
| 744 | shr_cl(high); |
| 745 | Label done; |
| 746 | test(ecx, Immediate(0x20)); |
| 747 | j(equal, &done, Label::kNear); |
| 748 | mov(low, high); |
| 749 | xor_(high, high); |
| 750 | bind(&done); |
| 751 | } |
| 752 | |
| 753 | void MacroAssembler::SarPair(Register high, Register low, uint8_t shift) { |
| 754 | if (shift >= 32) { |
| 755 | mov(low, high); |
| 756 | sar(low, shift - 32); |
| 757 | sar(high, 31); |
| 758 | } else { |
| 759 | shrd(high, low, shift); |
| 760 | sar(high, shift); |
| 761 | } |
| 762 | } |
| 763 | |
| 764 | void MacroAssembler::SarPair_cl(Register high, Register low) { |
| 765 | shrd_cl(low, high); |
| 766 | sar_cl(high); |
| 767 | Label done; |
| 768 | test(ecx, Immediate(0x20)); |
| 769 | j(equal, &done, Label::kNear); |
| 770 | mov(low, high); |
| 771 | sar(high, 31); |
| 772 | bind(&done); |
| 773 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 774 | |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 775 | bool MacroAssembler::IsUnsafeImmediate(const Immediate& x) { |
| 776 | static const int kMaxImmediateBits = 17; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 777 | if (!RelocInfo::IsNone(x.rmode_)) return false; |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 778 | return !is_intn(x.x_, kMaxImmediateBits); |
| 779 | } |
| 780 | |
| 781 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 782 | void MacroAssembler::SafeMove(Register dst, const Immediate& x) { |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 783 | if (IsUnsafeImmediate(x) && jit_cookie() != 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 784 | Move(dst, Immediate(x.x_ ^ jit_cookie())); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 785 | xor_(dst, jit_cookie()); |
| 786 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 787 | Move(dst, x); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 788 | } |
| 789 | } |
| 790 | |
| 791 | |
| 792 | void MacroAssembler::SafePush(const Immediate& x) { |
| 793 | if (IsUnsafeImmediate(x) && jit_cookie() != 0) { |
| 794 | push(Immediate(x.x_ ^ jit_cookie())); |
| 795 | xor_(Operand(esp, 0), Immediate(jit_cookie())); |
| 796 | } else { |
| 797 | push(x); |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 802 | void MacroAssembler::CmpObjectType(Register heap_object, |
| 803 | InstanceType type, |
| 804 | Register map) { |
| 805 | mov(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 806 | CmpInstanceType(map, type); |
| 807 | } |
| 808 | |
| 809 | |
| 810 | void MacroAssembler::CmpInstanceType(Register map, InstanceType type) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 811 | cmpb(FieldOperand(map, Map::kInstanceTypeOffset), Immediate(type)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 812 | } |
| 813 | |
| 814 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 815 | void MacroAssembler::CheckFastElements(Register map, |
| 816 | Label* fail, |
| 817 | Label::Distance distance) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 818 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 819 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 820 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 821 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 822 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 823 | Immediate(Map::kMaximumBitField2FastHoleyElementValue)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 824 | j(above, fail, distance); |
| 825 | } |
| 826 | |
| 827 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 828 | void MacroAssembler::CheckFastObjectElements(Register map, |
| 829 | Label* fail, |
| 830 | Label::Distance distance) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 831 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 832 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 833 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 834 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 835 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 836 | Immediate(Map::kMaximumBitField2FastHoleySmiElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 837 | j(below_equal, fail, distance); |
| 838 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 839 | Immediate(Map::kMaximumBitField2FastHoleyElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 840 | j(above, fail, distance); |
| 841 | } |
| 842 | |
| 843 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 844 | void MacroAssembler::CheckFastSmiElements(Register map, |
| 845 | Label* fail, |
| 846 | Label::Distance distance) { |
| 847 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 848 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 849 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 850 | Immediate(Map::kMaximumBitField2FastHoleySmiElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 851 | j(above, fail, distance); |
| 852 | } |
| 853 | |
| 854 | |
| 855 | void MacroAssembler::StoreNumberToDoubleElements( |
| 856 | Register maybe_number, |
| 857 | Register elements, |
| 858 | Register key, |
| 859 | Register scratch1, |
| 860 | XMMRegister scratch2, |
| 861 | Label* fail, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 862 | int elements_offset) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 863 | Label smi_value, done; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 864 | JumpIfSmi(maybe_number, &smi_value, Label::kNear); |
| 865 | |
| 866 | CheckMap(maybe_number, |
| 867 | isolate()->factory()->heap_number_map(), |
| 868 | fail, |
| 869 | DONT_DO_SMI_CHECK); |
| 870 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 871 | // Double value, turn potential sNaN into qNaN. |
| 872 | Move(scratch2, 1.0); |
| 873 | mulsd(scratch2, FieldOperand(maybe_number, HeapNumber::kValueOffset)); |
| 874 | jmp(&done, Label::kNear); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 875 | |
| 876 | bind(&smi_value); |
| 877 | // Value is a smi. Convert to a double and store. |
| 878 | // Preserve original value. |
| 879 | mov(scratch1, maybe_number); |
| 880 | SmiUntag(scratch1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 881 | Cvtsi2sd(scratch2, scratch1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 882 | bind(&done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 883 | movsd(FieldOperand(elements, key, times_4, |
| 884 | FixedDoubleArray::kHeaderSize - elements_offset), |
| 885 | scratch2); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 886 | } |
| 887 | |
| 888 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 889 | void MacroAssembler::CompareMap(Register obj, Handle<Map> map) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 890 | cmp(FieldOperand(obj, HeapObject::kMapOffset), map); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 891 | } |
| 892 | |
| 893 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 894 | void MacroAssembler::CheckMap(Register obj, |
| 895 | Handle<Map> map, |
| 896 | Label* fail, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 897 | SmiCheckType smi_check_type) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 898 | if (smi_check_type == DO_SMI_CHECK) { |
| 899 | JumpIfSmi(obj, fail); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 900 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 901 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 902 | CompareMap(obj, map); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 903 | j(not_equal, fail); |
| 904 | } |
| 905 | |
| 906 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 907 | void MacroAssembler::DispatchWeakMap(Register obj, Register scratch1, |
| 908 | Register scratch2, Handle<WeakCell> cell, |
| 909 | Handle<Code> success, |
| 910 | SmiCheckType smi_check_type) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 911 | Label fail; |
| 912 | if (smi_check_type == DO_SMI_CHECK) { |
| 913 | JumpIfSmi(obj, &fail); |
| 914 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 915 | mov(scratch1, FieldOperand(obj, HeapObject::kMapOffset)); |
| 916 | CmpWeakValue(scratch1, cell, scratch2); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 917 | j(equal, success); |
| 918 | |
| 919 | bind(&fail); |
| 920 | } |
| 921 | |
| 922 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 923 | Condition MacroAssembler::IsObjectStringType(Register heap_object, |
| 924 | Register map, |
| 925 | Register instance_type) { |
| 926 | mov(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 927 | movzx_b(instance_type, FieldOperand(map, Map::kInstanceTypeOffset)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 928 | STATIC_ASSERT(kNotStringTag != 0); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 929 | test(instance_type, Immediate(kIsNotStringMask)); |
| 930 | return zero; |
| 931 | } |
| 932 | |
| 933 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 934 | Condition MacroAssembler::IsObjectNameType(Register heap_object, |
| 935 | Register map, |
| 936 | Register instance_type) { |
| 937 | mov(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 938 | movzx_b(instance_type, FieldOperand(map, Map::kInstanceTypeOffset)); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 939 | cmpb(instance_type, Immediate(LAST_NAME_TYPE)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 940 | return below_equal; |
| 941 | } |
| 942 | |
| 943 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 944 | void MacroAssembler::FCmp() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 945 | fucomip(); |
| 946 | fstp(0); |
| 947 | } |
| 948 | |
| 949 | |
| 950 | void MacroAssembler::AssertNumber(Register object) { |
| 951 | if (emit_debug_code()) { |
| 952 | Label ok; |
| 953 | JumpIfSmi(object, &ok); |
| 954 | cmp(FieldOperand(object, HeapObject::kMapOffset), |
| 955 | isolate()->factory()->heap_number_map()); |
| 956 | Check(equal, kOperandNotANumber); |
| 957 | bind(&ok); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 958 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 959 | } |
| 960 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 961 | void MacroAssembler::AssertNotNumber(Register object) { |
| 962 | if (emit_debug_code()) { |
| 963 | test(object, Immediate(kSmiTagMask)); |
| 964 | Check(not_equal, kOperandIsANumber); |
| 965 | cmp(FieldOperand(object, HeapObject::kMapOffset), |
| 966 | isolate()->factory()->heap_number_map()); |
| 967 | Check(not_equal, kOperandIsANumber); |
| 968 | } |
| 969 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 970 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 971 | void MacroAssembler::AssertSmi(Register object) { |
| 972 | if (emit_debug_code()) { |
| 973 | test(object, Immediate(kSmiTagMask)); |
| 974 | Check(equal, kOperandIsNotASmi); |
| 975 | } |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 976 | } |
| 977 | |
| 978 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 979 | void MacroAssembler::AssertString(Register object) { |
| 980 | if (emit_debug_code()) { |
| 981 | test(object, Immediate(kSmiTagMask)); |
| 982 | Check(not_equal, kOperandIsASmiAndNotAString); |
| 983 | push(object); |
| 984 | mov(object, FieldOperand(object, HeapObject::kMapOffset)); |
| 985 | CmpInstanceType(object, FIRST_NONSTRING_TYPE); |
| 986 | pop(object); |
| 987 | Check(below, kOperandIsNotAString); |
| 988 | } |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 989 | } |
| 990 | |
| 991 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 992 | void MacroAssembler::AssertName(Register object) { |
| 993 | if (emit_debug_code()) { |
| 994 | test(object, Immediate(kSmiTagMask)); |
| 995 | Check(not_equal, kOperandIsASmiAndNotAName); |
| 996 | push(object); |
| 997 | mov(object, FieldOperand(object, HeapObject::kMapOffset)); |
| 998 | CmpInstanceType(object, LAST_NAME_TYPE); |
| 999 | pop(object); |
| 1000 | Check(below_equal, kOperandIsNotAName); |
| 1001 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1005 | void MacroAssembler::AssertFunction(Register object) { |
| 1006 | if (emit_debug_code()) { |
| 1007 | test(object, Immediate(kSmiTagMask)); |
| 1008 | Check(not_equal, kOperandIsASmiAndNotAFunction); |
| 1009 | Push(object); |
| 1010 | CmpObjectType(object, JS_FUNCTION_TYPE, object); |
| 1011 | Pop(object); |
| 1012 | Check(equal, kOperandIsNotAFunction); |
| 1013 | } |
| 1014 | } |
| 1015 | |
| 1016 | |
| 1017 | void MacroAssembler::AssertBoundFunction(Register object) { |
| 1018 | if (emit_debug_code()) { |
| 1019 | test(object, Immediate(kSmiTagMask)); |
| 1020 | Check(not_equal, kOperandIsASmiAndNotABoundFunction); |
| 1021 | Push(object); |
| 1022 | CmpObjectType(object, JS_BOUND_FUNCTION_TYPE, object); |
| 1023 | Pop(object); |
| 1024 | Check(equal, kOperandIsNotABoundFunction); |
| 1025 | } |
| 1026 | } |
| 1027 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1028 | void MacroAssembler::AssertGeneratorObject(Register object) { |
| 1029 | if (emit_debug_code()) { |
| 1030 | test(object, Immediate(kSmiTagMask)); |
| 1031 | Check(not_equal, kOperandIsASmiAndNotAGeneratorObject); |
| 1032 | Push(object); |
| 1033 | CmpObjectType(object, JS_GENERATOR_OBJECT_TYPE, object); |
| 1034 | Pop(object); |
| 1035 | Check(equal, kOperandIsNotAGeneratorObject); |
| 1036 | } |
| 1037 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1038 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1039 | void MacroAssembler::AssertReceiver(Register object) { |
| 1040 | if (emit_debug_code()) { |
| 1041 | test(object, Immediate(kSmiTagMask)); |
| 1042 | Check(not_equal, kOperandIsASmiAndNotAReceiver); |
| 1043 | Push(object); |
| 1044 | STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
| 1045 | CmpObjectType(object, FIRST_JS_RECEIVER_TYPE, object); |
| 1046 | Pop(object); |
| 1047 | Check(above_equal, kOperandIsNotAReceiver); |
| 1048 | } |
| 1049 | } |
| 1050 | |
| 1051 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1052 | void MacroAssembler::AssertUndefinedOrAllocationSite(Register object) { |
| 1053 | if (emit_debug_code()) { |
| 1054 | Label done_checking; |
| 1055 | AssertNotSmi(object); |
| 1056 | cmp(object, isolate()->factory()->undefined_value()); |
| 1057 | j(equal, &done_checking); |
| 1058 | cmp(FieldOperand(object, 0), |
| 1059 | Immediate(isolate()->factory()->allocation_site_map())); |
| 1060 | Assert(equal, kExpectedUndefinedOrCell); |
| 1061 | bind(&done_checking); |
| 1062 | } |
| 1063 | } |
| 1064 | |
| 1065 | |
| 1066 | void MacroAssembler::AssertNotSmi(Register object) { |
| 1067 | if (emit_debug_code()) { |
| 1068 | test(object, Immediate(kSmiTagMask)); |
| 1069 | Check(not_equal, kOperandIsASmi); |
| 1070 | } |
| 1071 | } |
| 1072 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1073 | void MacroAssembler::StubPrologue(StackFrame::Type type) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1074 | push(ebp); // Caller's frame pointer. |
| 1075 | mov(ebp, esp); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1076 | push(Immediate(Smi::FromInt(type))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1077 | } |
| 1078 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1079 | void MacroAssembler::Prologue(bool code_pre_aging) { |
| 1080 | PredictableCodeSizeScope predictible_code_size_scope(this, |
| 1081 | kNoCodeAgeSequenceLength); |
| 1082 | if (code_pre_aging) { |
| 1083 | // Pre-age the code. |
| 1084 | call(isolate()->builtins()->MarkCodeAsExecutedOnce(), |
| 1085 | RelocInfo::CODE_AGE_SEQUENCE); |
| 1086 | Nop(kNoCodeAgeSequenceLength - Assembler::kCallInstructionLength); |
| 1087 | } else { |
| 1088 | push(ebp); // Caller's frame pointer. |
| 1089 | mov(ebp, esp); |
| 1090 | push(esi); // Callee's context. |
| 1091 | push(edi); // Callee's JS function. |
| 1092 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1093 | } |
| 1094 | |
| 1095 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1096 | void MacroAssembler::EmitLoadTypeFeedbackVector(Register vector) { |
| 1097 | mov(vector, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1098 | mov(vector, FieldOperand(vector, JSFunction::kLiteralsOffset)); |
| 1099 | mov(vector, FieldOperand(vector, LiteralsArray::kFeedbackVectorOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1100 | } |
| 1101 | |
| 1102 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1103 | void MacroAssembler::EnterFrame(StackFrame::Type type, |
| 1104 | bool load_constant_pool_pointer_reg) { |
| 1105 | // Out-of-line constant pool not implemented on ia32. |
| 1106 | UNREACHABLE(); |
| 1107 | } |
| 1108 | |
| 1109 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1110 | void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| 1111 | push(ebp); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1112 | mov(ebp, esp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1113 | push(Immediate(Smi::FromInt(type))); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1114 | if (type == StackFrame::INTERNAL) { |
| 1115 | push(Immediate(CodeObject())); |
| 1116 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1117 | if (emit_debug_code()) { |
| 1118 | cmp(Operand(esp, 0), Immediate(isolate()->factory()->undefined_value())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1119 | Check(not_equal, kCodeObjectNotProperlyPatched); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1120 | } |
| 1121 | } |
| 1122 | |
| 1123 | |
| 1124 | void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1125 | if (emit_debug_code()) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1126 | cmp(Operand(ebp, CommonFrameConstants::kContextOrFrameTypeOffset), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1127 | Immediate(Smi::FromInt(type))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1128 | Check(equal, kStackFrameTypesMustMatch); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1129 | } |
| 1130 | leave(); |
| 1131 | } |
| 1132 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1133 | |
| 1134 | void MacroAssembler::EnterExitFramePrologue() { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1135 | // Set up the frame structure on the stack. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1136 | DCHECK_EQ(+2 * kPointerSize, ExitFrameConstants::kCallerSPDisplacement); |
| 1137 | DCHECK_EQ(+1 * kPointerSize, ExitFrameConstants::kCallerPCOffset); |
| 1138 | DCHECK_EQ(0 * kPointerSize, ExitFrameConstants::kCallerFPOffset); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1139 | push(ebp); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1140 | mov(ebp, esp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1141 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1142 | // Reserve room for entry stack pointer and push the code object. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1143 | push(Immediate(Smi::FromInt(StackFrame::EXIT))); |
| 1144 | DCHECK_EQ(-2 * kPointerSize, ExitFrameConstants::kSPOffset); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1145 | push(Immediate(0)); // Saved entry sp, patched before call. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1146 | DCHECK_EQ(-3 * kPointerSize, ExitFrameConstants::kCodeOffset); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1147 | push(Immediate(CodeObject())); // Accessed from ExitFrame::code_slot. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1148 | |
| 1149 | // Save the frame pointer and the context in top. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1150 | ExternalReference c_entry_fp_address(Isolate::kCEntryFPAddress, isolate()); |
| 1151 | ExternalReference context_address(Isolate::kContextAddress, isolate()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1152 | ExternalReference c_function_address(Isolate::kCFunctionAddress, isolate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1153 | mov(Operand::StaticVariable(c_entry_fp_address), ebp); |
| 1154 | mov(Operand::StaticVariable(context_address), esi); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1155 | mov(Operand::StaticVariable(c_function_address), ebx); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1156 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1157 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1158 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1159 | void MacroAssembler::EnterExitFrameEpilogue(int argc, bool save_doubles) { |
| 1160 | // Optionally save all XMM registers. |
| 1161 | if (save_doubles) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1162 | int space = XMMRegister::kMaxNumRegisters * kDoubleSize + |
| 1163 | argc * kPointerSize; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1164 | sub(esp, Immediate(space)); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1165 | const int offset = -ExitFrameConstants::kFixedFrameSizeFromFp; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1166 | for (int i = 0; i < XMMRegister::kMaxNumRegisters; i++) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1167 | XMMRegister reg = XMMRegister::from_code(i); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1168 | movsd(Operand(ebp, offset - ((i + 1) * kDoubleSize)), reg); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1169 | } |
| 1170 | } else { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1171 | sub(esp, Immediate(argc * kPointerSize)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1172 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1173 | |
| 1174 | // Get the required frame alignment for the OS. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1175 | const int kFrameAlignment = base::OS::ActivationFrameAlignment(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1176 | if (kFrameAlignment > 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1177 | DCHECK(base::bits::IsPowerOfTwo32(kFrameAlignment)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1178 | and_(esp, -kFrameAlignment); |
| 1179 | } |
| 1180 | |
| 1181 | // Patch the saved entry sp. |
| 1182 | mov(Operand(ebp, ExitFrameConstants::kSPOffset), esp); |
| 1183 | } |
| 1184 | |
| 1185 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1186 | void MacroAssembler::EnterExitFrame(int argc, bool save_doubles) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1187 | EnterExitFramePrologue(); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1188 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1189 | // Set up argc and argv in callee-saved registers. |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1190 | int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1191 | mov(edi, eax); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1192 | lea(esi, Operand(ebp, eax, times_4, offset)); |
| 1193 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1194 | // Reserve space for argc, argv and isolate. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1195 | EnterExitFrameEpilogue(argc, save_doubles); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1196 | } |
| 1197 | |
| 1198 | |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1199 | void MacroAssembler::EnterApiExitFrame(int argc) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1200 | EnterExitFramePrologue(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1201 | EnterExitFrameEpilogue(argc, false); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1202 | } |
| 1203 | |
| 1204 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1205 | void MacroAssembler::LeaveExitFrame(bool save_doubles, bool pop_arguments) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1206 | // Optionally restore all XMM registers. |
| 1207 | if (save_doubles) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1208 | const int offset = -ExitFrameConstants::kFixedFrameSizeFromFp; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1209 | for (int i = 0; i < XMMRegister::kMaxNumRegisters; i++) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1210 | XMMRegister reg = XMMRegister::from_code(i); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1211 | movsd(reg, Operand(ebp, offset - ((i + 1) * kDoubleSize))); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1212 | } |
| 1213 | } |
| 1214 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1215 | if (pop_arguments) { |
| 1216 | // Get the return address from the stack and restore the frame pointer. |
| 1217 | mov(ecx, Operand(ebp, 1 * kPointerSize)); |
| 1218 | mov(ebp, Operand(ebp, 0 * kPointerSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1219 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1220 | // Pop the arguments and the receiver from the caller stack. |
| 1221 | lea(esp, Operand(esi, 1 * kPointerSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1222 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1223 | // Push the return address to get ready to return. |
| 1224 | push(ecx); |
| 1225 | } else { |
| 1226 | // Otherwise just leave the exit frame. |
| 1227 | leave(); |
| 1228 | } |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1229 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1230 | LeaveExitFrameEpilogue(true); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1231 | } |
| 1232 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1233 | |
| 1234 | void MacroAssembler::LeaveExitFrameEpilogue(bool restore_context) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1235 | // Restore current context from top and clear it in debug mode. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1236 | ExternalReference context_address(Isolate::kContextAddress, isolate()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1237 | if (restore_context) { |
| 1238 | mov(esi, Operand::StaticVariable(context_address)); |
| 1239 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1240 | #ifdef DEBUG |
| 1241 | mov(Operand::StaticVariable(context_address), Immediate(0)); |
| 1242 | #endif |
| 1243 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1244 | // Clear the top frame. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1245 | ExternalReference c_entry_fp_address(Isolate::kCEntryFPAddress, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1246 | isolate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1247 | mov(Operand::StaticVariable(c_entry_fp_address), Immediate(0)); |
| 1248 | } |
| 1249 | |
| 1250 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1251 | void MacroAssembler::LeaveApiExitFrame(bool restore_context) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1252 | mov(esp, ebp); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1253 | pop(ebp); |
| 1254 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1255 | LeaveExitFrameEpilogue(restore_context); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1256 | } |
| 1257 | |
| 1258 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1259 | void MacroAssembler::PushStackHandler() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1260 | // Adjust this code if not the case. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1261 | STATIC_ASSERT(StackHandlerConstants::kSize == 1 * kPointerSize); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1262 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1263 | |
| 1264 | // Link the current handler as the next handler. |
| 1265 | ExternalReference handler_address(Isolate::kHandlerAddress, isolate()); |
| 1266 | push(Operand::StaticVariable(handler_address)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1267 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1268 | // Set this new handler as the current one. |
| 1269 | mov(Operand::StaticVariable(handler_address), esp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1270 | } |
| 1271 | |
| 1272 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1273 | void MacroAssembler::PopStackHandler() { |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1274 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1275 | ExternalReference handler_address(Isolate::kHandlerAddress, isolate()); |
| 1276 | pop(Operand::StaticVariable(handler_address)); |
| 1277 | add(esp, Immediate(StackHandlerConstants::kSize - kPointerSize)); |
| 1278 | } |
| 1279 | |
| 1280 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1281 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1282 | Register scratch1, |
| 1283 | Register scratch2, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1284 | Label* miss) { |
| 1285 | Label same_contexts; |
| 1286 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1287 | DCHECK(!holder_reg.is(scratch1)); |
| 1288 | DCHECK(!holder_reg.is(scratch2)); |
| 1289 | DCHECK(!scratch1.is(scratch2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1290 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1291 | // Load current lexical context from the active StandardFrame, which |
| 1292 | // may require crawling past STUB frames. |
| 1293 | Label load_context; |
| 1294 | Label has_context; |
| 1295 | mov(scratch2, ebp); |
| 1296 | bind(&load_context); |
| 1297 | mov(scratch1, |
| 1298 | MemOperand(scratch2, CommonFrameConstants::kContextOrFrameTypeOffset)); |
| 1299 | JumpIfNotSmi(scratch1, &has_context); |
| 1300 | mov(scratch2, MemOperand(scratch2, CommonFrameConstants::kCallerFPOffset)); |
| 1301 | jmp(&load_context); |
| 1302 | bind(&has_context); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1303 | |
| 1304 | // When generating debug code, make sure the lexical context is set. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1305 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1306 | cmp(scratch1, Immediate(0)); |
| 1307 | Check(not_equal, kWeShouldNotHaveAnEmptyLexicalContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1308 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1309 | // Load the native context of the current context. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1310 | mov(scratch1, ContextOperand(scratch1, Context::NATIVE_CONTEXT_INDEX)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1311 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1312 | // Check the context is a native context. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1313 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1314 | // Read the first word and compare to native_context_map. |
| 1315 | cmp(FieldOperand(scratch1, HeapObject::kMapOffset), |
| 1316 | isolate()->factory()->native_context_map()); |
| 1317 | Check(equal, kJSGlobalObjectNativeContextShouldBeANativeContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1318 | } |
| 1319 | |
| 1320 | // Check if both contexts are the same. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1321 | cmp(scratch1, FieldOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1322 | j(equal, &same_contexts); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1323 | |
| 1324 | // Compare security tokens, save holder_reg on the stack so we can use it |
| 1325 | // as a temporary register. |
| 1326 | // |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1327 | // Check that the security token in the calling global object is |
| 1328 | // compatible with the security token in the receiving global |
| 1329 | // object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1330 | mov(scratch2, |
| 1331 | FieldOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1332 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1333 | // Check the context is a native context. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1334 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1335 | cmp(scratch2, isolate()->factory()->null_value()); |
| 1336 | Check(not_equal, kJSGlobalProxyContextShouldNotBeNull); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1337 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1338 | // Read the first word and compare to native_context_map(), |
| 1339 | cmp(FieldOperand(scratch2, HeapObject::kMapOffset), |
| 1340 | isolate()->factory()->native_context_map()); |
| 1341 | Check(equal, kJSGlobalObjectNativeContextShouldBeANativeContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1342 | } |
| 1343 | |
| 1344 | int token_offset = Context::kHeaderSize + |
| 1345 | Context::SECURITY_TOKEN_INDEX * kPointerSize; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1346 | mov(scratch1, FieldOperand(scratch1, token_offset)); |
| 1347 | cmp(scratch1, FieldOperand(scratch2, token_offset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1348 | j(not_equal, miss); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1349 | |
| 1350 | bind(&same_contexts); |
| 1351 | } |
| 1352 | |
| 1353 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1354 | // Compute the hash code from the untagged key. This must be kept in sync with |
| 1355 | // ComputeIntegerHash in utils.h and KeyedLoadGenericStub in |
| 1356 | // code-stub-hydrogen.cc |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1357 | // |
| 1358 | // Note: r0 will contain hash code |
| 1359 | void MacroAssembler::GetNumberHash(Register r0, Register scratch) { |
| 1360 | // Xor original key with a seed. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1361 | if (serializer_enabled()) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1362 | ExternalReference roots_array_start = |
| 1363 | ExternalReference::roots_array_start(isolate()); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1364 | mov(scratch, Immediate(Heap::kHashSeedRootIndex)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1365 | mov(scratch, |
| 1366 | Operand::StaticArray(scratch, times_pointer_size, roots_array_start)); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1367 | SmiUntag(scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1368 | xor_(r0, scratch); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1369 | } else { |
| 1370 | int32_t seed = isolate()->heap()->HashSeed(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1371 | xor_(r0, Immediate(seed)); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1372 | } |
| 1373 | |
| 1374 | // hash = ~hash + (hash << 15); |
| 1375 | mov(scratch, r0); |
| 1376 | not_(r0); |
| 1377 | shl(scratch, 15); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1378 | add(r0, scratch); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1379 | // hash = hash ^ (hash >> 12); |
| 1380 | mov(scratch, r0); |
| 1381 | shr(scratch, 12); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1382 | xor_(r0, scratch); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1383 | // hash = hash + (hash << 2); |
| 1384 | lea(r0, Operand(r0, r0, times_4, 0)); |
| 1385 | // hash = hash ^ (hash >> 4); |
| 1386 | mov(scratch, r0); |
| 1387 | shr(scratch, 4); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1388 | xor_(r0, scratch); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1389 | // hash = hash * 2057; |
| 1390 | imul(r0, r0, 2057); |
| 1391 | // hash = hash ^ (hash >> 16); |
| 1392 | mov(scratch, r0); |
| 1393 | shr(scratch, 16); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1394 | xor_(r0, scratch); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1395 | and_(r0, 0x3fffffff); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1396 | } |
| 1397 | |
| 1398 | |
| 1399 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1400 | void MacroAssembler::LoadFromNumberDictionary(Label* miss, |
| 1401 | Register elements, |
| 1402 | Register key, |
| 1403 | Register r0, |
| 1404 | Register r1, |
| 1405 | Register r2, |
| 1406 | Register result) { |
| 1407 | // Register use: |
| 1408 | // |
| 1409 | // elements - holds the slow-case elements of the receiver and is unchanged. |
| 1410 | // |
| 1411 | // key - holds the smi key on entry and is unchanged. |
| 1412 | // |
| 1413 | // Scratch registers: |
| 1414 | // |
| 1415 | // r0 - holds the untagged key on entry and holds the hash once computed. |
| 1416 | // |
| 1417 | // r1 - used to hold the capacity mask of the dictionary |
| 1418 | // |
| 1419 | // r2 - used for the index into the dictionary. |
| 1420 | // |
| 1421 | // result - holds the result on exit if the load succeeds and we fall through. |
| 1422 | |
| 1423 | Label done; |
| 1424 | |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1425 | GetNumberHash(r0, r1); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1426 | |
| 1427 | // Compute capacity mask. |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1428 | mov(r1, FieldOperand(elements, SeededNumberDictionary::kCapacityOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1429 | shr(r1, kSmiTagSize); // convert smi to int |
| 1430 | dec(r1); |
| 1431 | |
| 1432 | // Generate an unrolled loop that performs a few probes before giving up. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1433 | for (int i = 0; i < kNumberDictionaryProbes; i++) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1434 | // Use r2 for index calculations and keep the hash intact in r0. |
| 1435 | mov(r2, r0); |
| 1436 | // Compute the masked index: (hash + i + i * i) & mask. |
| 1437 | if (i > 0) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1438 | add(r2, Immediate(SeededNumberDictionary::GetProbeOffset(i))); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1439 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1440 | and_(r2, r1); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1441 | |
| 1442 | // Scale the index by multiplying by the entry size. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1443 | DCHECK(SeededNumberDictionary::kEntrySize == 3); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1444 | lea(r2, Operand(r2, r2, times_2, 0)); // r2 = r2 * 3 |
| 1445 | |
| 1446 | // Check if the key matches. |
| 1447 | cmp(key, FieldOperand(elements, |
| 1448 | r2, |
| 1449 | times_pointer_size, |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1450 | SeededNumberDictionary::kElementsStartOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1451 | if (i != (kNumberDictionaryProbes - 1)) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1452 | j(equal, &done); |
| 1453 | } else { |
| 1454 | j(not_equal, miss); |
| 1455 | } |
| 1456 | } |
| 1457 | |
| 1458 | bind(&done); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1459 | // Check that the value is a field property. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1460 | const int kDetailsOffset = |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1461 | SeededNumberDictionary::kElementsStartOffset + 2 * kPointerSize; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1462 | DCHECK_EQ(DATA, 0); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1463 | test(FieldOperand(elements, r2, times_pointer_size, kDetailsOffset), |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1464 | Immediate(PropertyDetails::TypeField::kMask << kSmiTagSize)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1465 | j(not_zero, miss); |
| 1466 | |
| 1467 | // Get the value at the masked, scaled index. |
| 1468 | const int kValueOffset = |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1469 | SeededNumberDictionary::kElementsStartOffset + kPointerSize; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1470 | mov(result, FieldOperand(elements, r2, times_pointer_size, kValueOffset)); |
| 1471 | } |
| 1472 | |
| 1473 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1474 | void MacroAssembler::LoadAllocationTopHelper(Register result, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1475 | Register scratch, |
| 1476 | AllocationFlags flags) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1477 | ExternalReference allocation_top = |
| 1478 | AllocationUtils::GetAllocationTopReference(isolate(), flags); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1479 | |
| 1480 | // Just return if allocation top is already known. |
| 1481 | if ((flags & RESULT_CONTAINS_TOP) != 0) { |
| 1482 | // No use of scratch if allocation top is provided. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1483 | DCHECK(scratch.is(no_reg)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1484 | #ifdef DEBUG |
| 1485 | // Assert that result actually contains top on entry. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1486 | cmp(result, Operand::StaticVariable(allocation_top)); |
| 1487 | Check(equal, kUnexpectedAllocationTop); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1488 | #endif |
| 1489 | return; |
| 1490 | } |
| 1491 | |
| 1492 | // Move address of new object to result. Use scratch register if available. |
| 1493 | if (scratch.is(no_reg)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1494 | mov(result, Operand::StaticVariable(allocation_top)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1495 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1496 | mov(scratch, Immediate(allocation_top)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1497 | mov(result, Operand(scratch, 0)); |
| 1498 | } |
| 1499 | } |
| 1500 | |
| 1501 | |
| 1502 | void MacroAssembler::UpdateAllocationTopHelper(Register result_end, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1503 | Register scratch, |
| 1504 | AllocationFlags flags) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1505 | if (emit_debug_code()) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1506 | test(result_end, Immediate(kObjectAlignmentMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1507 | Check(zero, kUnalignedAllocationInNewSpace); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1508 | } |
| 1509 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1510 | ExternalReference allocation_top = |
| 1511 | AllocationUtils::GetAllocationTopReference(isolate(), flags); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1512 | |
| 1513 | // Update new top. Use scratch if available. |
| 1514 | if (scratch.is(no_reg)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1515 | mov(Operand::StaticVariable(allocation_top), result_end); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1516 | } else { |
| 1517 | mov(Operand(scratch, 0), result_end); |
| 1518 | } |
| 1519 | } |
| 1520 | |
| 1521 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1522 | void MacroAssembler::Allocate(int object_size, |
| 1523 | Register result, |
| 1524 | Register result_end, |
| 1525 | Register scratch, |
| 1526 | Label* gc_required, |
| 1527 | AllocationFlags flags) { |
| 1528 | DCHECK((flags & (RESULT_CONTAINS_TOP | SIZE_IN_WORDS)) == 0); |
| 1529 | DCHECK(object_size <= Page::kMaxRegularHeapObjectSize); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1530 | DCHECK((flags & ALLOCATION_FOLDED) == 0); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1531 | if (!FLAG_inline_new) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1532 | if (emit_debug_code()) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1533 | // Trash the registers to simulate an allocation failure. |
| 1534 | mov(result, Immediate(0x7091)); |
| 1535 | if (result_end.is_valid()) { |
| 1536 | mov(result_end, Immediate(0x7191)); |
| 1537 | } |
| 1538 | if (scratch.is_valid()) { |
| 1539 | mov(scratch, Immediate(0x7291)); |
| 1540 | } |
| 1541 | } |
| 1542 | jmp(gc_required); |
| 1543 | return; |
| 1544 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1545 | DCHECK(!result.is(result_end)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1546 | |
| 1547 | // Load address of new object into result. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1548 | LoadAllocationTopHelper(result, scratch, flags); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1549 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1550 | ExternalReference allocation_limit = |
| 1551 | AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
| 1552 | |
| 1553 | // Align the next allocation. Storing the filler map without checking top is |
| 1554 | // safe in new-space because the limit of the heap is aligned there. |
| 1555 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1556 | DCHECK(kPointerAlignment * 2 == kDoubleAlignment); |
| 1557 | Label aligned; |
| 1558 | test(result, Immediate(kDoubleAlignmentMask)); |
| 1559 | j(zero, &aligned, Label::kNear); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1560 | if ((flags & PRETENURE) != 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1561 | cmp(result, Operand::StaticVariable(allocation_limit)); |
| 1562 | j(above_equal, gc_required); |
| 1563 | } |
| 1564 | mov(Operand(result, 0), |
| 1565 | Immediate(isolate()->factory()->one_pointer_filler_map())); |
| 1566 | add(result, Immediate(kDoubleSize / 2)); |
| 1567 | bind(&aligned); |
| 1568 | } |
| 1569 | |
| 1570 | // Calculate new top and bail out if space is exhausted. |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 1571 | Register top_reg = result_end.is_valid() ? result_end : result; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1572 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1573 | if (!top_reg.is(result)) { |
| 1574 | mov(top_reg, result); |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 1575 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1576 | add(top_reg, Immediate(object_size)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1577 | cmp(top_reg, Operand::StaticVariable(allocation_limit)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1578 | j(above, gc_required); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1579 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1580 | if ((flags & ALLOCATION_FOLDING_DOMINATOR) == 0) { |
| 1581 | // The top pointer is not updated for allocation folding dominators. |
| 1582 | UpdateAllocationTopHelper(top_reg, scratch, flags); |
| 1583 | } |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 1584 | |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 1585 | if (top_reg.is(result)) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1586 | sub(result, Immediate(object_size - kHeapObjectTag)); |
| 1587 | } else { |
| 1588 | // Tag the result. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1589 | DCHECK(kHeapObjectTag == 1); |
| 1590 | inc(result); |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 1591 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1592 | } |
| 1593 | |
| 1594 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1595 | void MacroAssembler::Allocate(int header_size, |
| 1596 | ScaleFactor element_size, |
| 1597 | Register element_count, |
| 1598 | RegisterValueType element_count_type, |
| 1599 | Register result, |
| 1600 | Register result_end, |
| 1601 | Register scratch, |
| 1602 | Label* gc_required, |
| 1603 | AllocationFlags flags) { |
| 1604 | DCHECK((flags & SIZE_IN_WORDS) == 0); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1605 | DCHECK((flags & ALLOCATION_FOLDING_DOMINATOR) == 0); |
| 1606 | DCHECK((flags & ALLOCATION_FOLDED) == 0); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1607 | if (!FLAG_inline_new) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1608 | if (emit_debug_code()) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1609 | // Trash the registers to simulate an allocation failure. |
| 1610 | mov(result, Immediate(0x7091)); |
| 1611 | mov(result_end, Immediate(0x7191)); |
| 1612 | if (scratch.is_valid()) { |
| 1613 | mov(scratch, Immediate(0x7291)); |
| 1614 | } |
| 1615 | // Register element_count is not modified by the function. |
| 1616 | } |
| 1617 | jmp(gc_required); |
| 1618 | return; |
| 1619 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1620 | DCHECK(!result.is(result_end)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1621 | |
| 1622 | // Load address of new object into result. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1623 | LoadAllocationTopHelper(result, scratch, flags); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1624 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1625 | ExternalReference allocation_limit = |
| 1626 | AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1627 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1628 | // Align the next allocation. Storing the filler map without checking top is |
| 1629 | // safe in new-space because the limit of the heap is aligned there. |
| 1630 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1631 | DCHECK(kPointerAlignment * 2 == kDoubleAlignment); |
| 1632 | Label aligned; |
| 1633 | test(result, Immediate(kDoubleAlignmentMask)); |
| 1634 | j(zero, &aligned, Label::kNear); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1635 | if ((flags & PRETENURE) != 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1636 | cmp(result, Operand::StaticVariable(allocation_limit)); |
| 1637 | j(above_equal, gc_required); |
| 1638 | } |
| 1639 | mov(Operand(result, 0), |
| 1640 | Immediate(isolate()->factory()->one_pointer_filler_map())); |
| 1641 | add(result, Immediate(kDoubleSize / 2)); |
| 1642 | bind(&aligned); |
| 1643 | } |
| 1644 | |
| 1645 | // Calculate new top and bail out if space is exhausted. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1646 | // We assume that element_count*element_size + header_size does not |
| 1647 | // overflow. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1648 | if (element_count_type == REGISTER_VALUE_IS_SMI) { |
| 1649 | STATIC_ASSERT(static_cast<ScaleFactor>(times_2 - 1) == times_1); |
| 1650 | STATIC_ASSERT(static_cast<ScaleFactor>(times_4 - 1) == times_2); |
| 1651 | STATIC_ASSERT(static_cast<ScaleFactor>(times_8 - 1) == times_4); |
| 1652 | DCHECK(element_size >= times_2); |
| 1653 | DCHECK(kSmiTagSize == 1); |
| 1654 | element_size = static_cast<ScaleFactor>(element_size - 1); |
| 1655 | } else { |
| 1656 | DCHECK(element_count_type == REGISTER_VALUE_IS_INT32); |
| 1657 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1658 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1659 | lea(result_end, Operand(element_count, element_size, header_size)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1660 | add(result_end, result); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1661 | cmp(result_end, Operand::StaticVariable(allocation_limit)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1662 | j(above, gc_required); |
| 1663 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1664 | // Tag result. |
| 1665 | DCHECK(kHeapObjectTag == 1); |
| 1666 | inc(result); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1667 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1668 | UpdateAllocationTopHelper(result_end, scratch, flags); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1669 | } |
| 1670 | |
| 1671 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1672 | void MacroAssembler::Allocate(Register object_size, |
| 1673 | Register result, |
| 1674 | Register result_end, |
| 1675 | Register scratch, |
| 1676 | Label* gc_required, |
| 1677 | AllocationFlags flags) { |
| 1678 | DCHECK((flags & (RESULT_CONTAINS_TOP | SIZE_IN_WORDS)) == 0); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1679 | DCHECK((flags & ALLOCATION_FOLDED) == 0); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1680 | if (!FLAG_inline_new) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1681 | if (emit_debug_code()) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1682 | // Trash the registers to simulate an allocation failure. |
| 1683 | mov(result, Immediate(0x7091)); |
| 1684 | mov(result_end, Immediate(0x7191)); |
| 1685 | if (scratch.is_valid()) { |
| 1686 | mov(scratch, Immediate(0x7291)); |
| 1687 | } |
| 1688 | // object_size is left unchanged by this function. |
| 1689 | } |
| 1690 | jmp(gc_required); |
| 1691 | return; |
| 1692 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1693 | DCHECK(!result.is(result_end)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1694 | |
| 1695 | // Load address of new object into result. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1696 | LoadAllocationTopHelper(result, scratch, flags); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1697 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1698 | ExternalReference allocation_limit = |
| 1699 | AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
| 1700 | |
| 1701 | // Align the next allocation. Storing the filler map without checking top is |
| 1702 | // safe in new-space because the limit of the heap is aligned there. |
| 1703 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1704 | DCHECK(kPointerAlignment * 2 == kDoubleAlignment); |
| 1705 | Label aligned; |
| 1706 | test(result, Immediate(kDoubleAlignmentMask)); |
| 1707 | j(zero, &aligned, Label::kNear); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1708 | if ((flags & PRETENURE) != 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1709 | cmp(result, Operand::StaticVariable(allocation_limit)); |
| 1710 | j(above_equal, gc_required); |
| 1711 | } |
| 1712 | mov(Operand(result, 0), |
| 1713 | Immediate(isolate()->factory()->one_pointer_filler_map())); |
| 1714 | add(result, Immediate(kDoubleSize / 2)); |
| 1715 | bind(&aligned); |
| 1716 | } |
| 1717 | |
| 1718 | // Calculate new top and bail out if space is exhausted. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1719 | if (!object_size.is(result_end)) { |
| 1720 | mov(result_end, object_size); |
| 1721 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1722 | add(result_end, result); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1723 | cmp(result_end, Operand::StaticVariable(allocation_limit)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1724 | j(above, gc_required); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1725 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1726 | // Tag result. |
| 1727 | DCHECK(kHeapObjectTag == 1); |
| 1728 | inc(result); |
| 1729 | |
| 1730 | if ((flags & ALLOCATION_FOLDING_DOMINATOR) == 0) { |
| 1731 | // The top pointer is not updated for allocation folding dominators. |
| 1732 | UpdateAllocationTopHelper(result_end, scratch, flags); |
| 1733 | } |
| 1734 | } |
| 1735 | |
| 1736 | void MacroAssembler::FastAllocate(int object_size, Register result, |
| 1737 | Register result_end, AllocationFlags flags) { |
| 1738 | DCHECK(!result.is(result_end)); |
| 1739 | // Load address of new object into result. |
| 1740 | LoadAllocationTopHelper(result, no_reg, flags); |
| 1741 | |
| 1742 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| 1743 | DCHECK(kPointerAlignment * 2 == kDoubleAlignment); |
| 1744 | Label aligned; |
| 1745 | test(result, Immediate(kDoubleAlignmentMask)); |
| 1746 | j(zero, &aligned, Label::kNear); |
| 1747 | mov(Operand(result, 0), |
| 1748 | Immediate(isolate()->factory()->one_pointer_filler_map())); |
| 1749 | add(result, Immediate(kDoubleSize / 2)); |
| 1750 | bind(&aligned); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1751 | } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1752 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1753 | lea(result_end, Operand(result, object_size)); |
| 1754 | UpdateAllocationTopHelper(result_end, no_reg, flags); |
| 1755 | |
| 1756 | DCHECK(kHeapObjectTag == 1); |
| 1757 | inc(result); |
| 1758 | } |
| 1759 | |
| 1760 | void MacroAssembler::FastAllocate(Register object_size, Register result, |
| 1761 | Register result_end, AllocationFlags flags) { |
| 1762 | DCHECK(!result.is(result_end)); |
| 1763 | // Load address of new object into result. |
| 1764 | LoadAllocationTopHelper(result, no_reg, flags); |
| 1765 | |
| 1766 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| 1767 | DCHECK(kPointerAlignment * 2 == kDoubleAlignment); |
| 1768 | Label aligned; |
| 1769 | test(result, Immediate(kDoubleAlignmentMask)); |
| 1770 | j(zero, &aligned, Label::kNear); |
| 1771 | mov(Operand(result, 0), |
| 1772 | Immediate(isolate()->factory()->one_pointer_filler_map())); |
| 1773 | add(result, Immediate(kDoubleSize / 2)); |
| 1774 | bind(&aligned); |
| 1775 | } |
| 1776 | |
| 1777 | lea(result_end, Operand(result, object_size, times_1, 0)); |
| 1778 | UpdateAllocationTopHelper(result_end, no_reg, flags); |
| 1779 | |
| 1780 | DCHECK(kHeapObjectTag == 1); |
| 1781 | inc(result); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1782 | } |
| 1783 | |
| 1784 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1785 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 1786 | Register scratch1, |
| 1787 | Register scratch2, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1788 | Label* gc_required, |
| 1789 | MutableMode mode) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1790 | // Allocate heap number in new space. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1791 | Allocate(HeapNumber::kSize, result, scratch1, scratch2, gc_required, |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1792 | NO_ALLOCATION_FLAGS); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1793 | |
| 1794 | Handle<Map> map = mode == MUTABLE |
| 1795 | ? isolate()->factory()->mutable_heap_number_map() |
| 1796 | : isolate()->factory()->heap_number_map(); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1797 | |
| 1798 | // Set the map. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1799 | mov(FieldOperand(result, HeapObject::kMapOffset), Immediate(map)); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1800 | } |
| 1801 | |
| 1802 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1803 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 1804 | Register length, |
| 1805 | Register scratch1, |
| 1806 | Register scratch2, |
| 1807 | Register scratch3, |
| 1808 | Label* gc_required) { |
| 1809 | // Calculate the number of bytes needed for the characters in the string while |
| 1810 | // observing object alignment. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1811 | DCHECK((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 1812 | DCHECK(kShortSize == 2); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1813 | // scratch1 = length * 2 + kObjectAlignmentMask. |
| 1814 | lea(scratch1, Operand(length, length, times_1, kObjectAlignmentMask)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1815 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1816 | |
| 1817 | // Allocate two byte string in new space. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1818 | Allocate(SeqTwoByteString::kHeaderSize, times_1, scratch1, |
| 1819 | REGISTER_VALUE_IS_INT32, result, scratch2, scratch3, gc_required, |
| 1820 | NO_ALLOCATION_FLAGS); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1821 | |
| 1822 | // Set the map, length and hash field. |
| 1823 | mov(FieldOperand(result, HeapObject::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1824 | Immediate(isolate()->factory()->string_map())); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1825 | mov(scratch1, length); |
| 1826 | SmiTag(scratch1); |
| 1827 | mov(FieldOperand(result, String::kLengthOffset), scratch1); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1828 | mov(FieldOperand(result, String::kHashFieldOffset), |
| 1829 | Immediate(String::kEmptyHashField)); |
| 1830 | } |
| 1831 | |
| 1832 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1833 | void MacroAssembler::AllocateOneByteString(Register result, Register length, |
| 1834 | Register scratch1, Register scratch2, |
| 1835 | Register scratch3, |
| 1836 | Label* gc_required) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1837 | // Calculate the number of bytes needed for the characters in the string while |
| 1838 | // observing object alignment. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1839 | DCHECK((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1840 | mov(scratch1, length); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1841 | DCHECK(kCharSize == 1); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1842 | add(scratch1, Immediate(kObjectAlignmentMask)); |
| 1843 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1844 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1845 | // Allocate one-byte string in new space. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1846 | Allocate(SeqOneByteString::kHeaderSize, times_1, scratch1, |
| 1847 | REGISTER_VALUE_IS_INT32, result, scratch2, scratch3, gc_required, |
| 1848 | NO_ALLOCATION_FLAGS); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1849 | |
| 1850 | // Set the map, length and hash field. |
| 1851 | mov(FieldOperand(result, HeapObject::kMapOffset), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1852 | Immediate(isolate()->factory()->one_byte_string_map())); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1853 | mov(scratch1, length); |
| 1854 | SmiTag(scratch1); |
| 1855 | mov(FieldOperand(result, String::kLengthOffset), scratch1); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1856 | mov(FieldOperand(result, String::kHashFieldOffset), |
| 1857 | Immediate(String::kEmptyHashField)); |
| 1858 | } |
| 1859 | |
| 1860 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1861 | void MacroAssembler::AllocateOneByteString(Register result, int length, |
| 1862 | Register scratch1, Register scratch2, |
| 1863 | Label* gc_required) { |
| 1864 | DCHECK(length > 0); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 1865 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1866 | // Allocate one-byte string in new space. |
| 1867 | Allocate(SeqOneByteString::SizeFor(length), result, scratch1, scratch2, |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1868 | gc_required, NO_ALLOCATION_FLAGS); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 1869 | |
| 1870 | // Set the map, length and hash field. |
| 1871 | mov(FieldOperand(result, HeapObject::kMapOffset), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1872 | Immediate(isolate()->factory()->one_byte_string_map())); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 1873 | mov(FieldOperand(result, String::kLengthOffset), |
| 1874 | Immediate(Smi::FromInt(length))); |
| 1875 | mov(FieldOperand(result, String::kHashFieldOffset), |
| 1876 | Immediate(String::kEmptyHashField)); |
| 1877 | } |
| 1878 | |
| 1879 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1880 | void MacroAssembler::AllocateTwoByteConsString(Register result, |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1881 | Register scratch1, |
| 1882 | Register scratch2, |
| 1883 | Label* gc_required) { |
| 1884 | // Allocate heap number in new space. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1885 | Allocate(ConsString::kSize, result, scratch1, scratch2, gc_required, |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1886 | NO_ALLOCATION_FLAGS); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1887 | |
| 1888 | // Set the map. The other fields are left uninitialized. |
| 1889 | mov(FieldOperand(result, HeapObject::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1890 | Immediate(isolate()->factory()->cons_string_map())); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1891 | } |
| 1892 | |
| 1893 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1894 | void MacroAssembler::AllocateOneByteConsString(Register result, |
| 1895 | Register scratch1, |
| 1896 | Register scratch2, |
| 1897 | Label* gc_required) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1898 | Allocate(ConsString::kSize, result, scratch1, scratch2, gc_required, |
| 1899 | NO_ALLOCATION_FLAGS); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1900 | |
| 1901 | // Set the map. The other fields are left uninitialized. |
| 1902 | mov(FieldOperand(result, HeapObject::kMapOffset), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1903 | Immediate(isolate()->factory()->cons_one_byte_string_map())); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1904 | } |
| 1905 | |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1906 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1907 | void MacroAssembler::AllocateTwoByteSlicedString(Register result, |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1908 | Register scratch1, |
| 1909 | Register scratch2, |
| 1910 | Label* gc_required) { |
| 1911 | // Allocate heap number in new space. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1912 | Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1913 | NO_ALLOCATION_FLAGS); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1914 | |
| 1915 | // Set the map. The other fields are left uninitialized. |
| 1916 | mov(FieldOperand(result, HeapObject::kMapOffset), |
| 1917 | Immediate(isolate()->factory()->sliced_string_map())); |
| 1918 | } |
| 1919 | |
| 1920 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1921 | void MacroAssembler::AllocateOneByteSlicedString(Register result, |
| 1922 | Register scratch1, |
| 1923 | Register scratch2, |
| 1924 | Label* gc_required) { |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1925 | // Allocate heap number in new space. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1926 | Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1927 | NO_ALLOCATION_FLAGS); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1928 | |
| 1929 | // Set the map. The other fields are left uninitialized. |
| 1930 | mov(FieldOperand(result, HeapObject::kMapOffset), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1931 | Immediate(isolate()->factory()->sliced_one_byte_string_map())); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1932 | } |
| 1933 | |
| 1934 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1935 | void MacroAssembler::AllocateJSValue(Register result, Register constructor, |
| 1936 | Register value, Register scratch, |
| 1937 | Label* gc_required) { |
| 1938 | DCHECK(!result.is(constructor)); |
| 1939 | DCHECK(!result.is(scratch)); |
| 1940 | DCHECK(!result.is(value)); |
| 1941 | |
| 1942 | // Allocate JSValue in new space. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1943 | Allocate(JSValue::kSize, result, scratch, no_reg, gc_required, |
| 1944 | NO_ALLOCATION_FLAGS); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1945 | |
| 1946 | // Initialize the JSValue. |
| 1947 | LoadGlobalFunctionInitialMap(constructor, scratch); |
| 1948 | mov(FieldOperand(result, HeapObject::kMapOffset), scratch); |
| 1949 | LoadRoot(scratch, Heap::kEmptyFixedArrayRootIndex); |
| 1950 | mov(FieldOperand(result, JSObject::kPropertiesOffset), scratch); |
| 1951 | mov(FieldOperand(result, JSObject::kElementsOffset), scratch); |
| 1952 | mov(FieldOperand(result, JSValue::kValueOffset), value); |
| 1953 | STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize); |
| 1954 | } |
| 1955 | |
| 1956 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1957 | // Copy memory, byte-by-byte, from source to destination. Not optimized for |
| 1958 | // long or aligned copies. The contents of scratch and length are destroyed. |
| 1959 | // Source and destination are incremented by length. |
| 1960 | // Many variants of movsb, loop unrolling, word moves, and indexed operands |
| 1961 | // have been tried here already, and this is fastest. |
| 1962 | // A simpler loop is faster on small copies, but 30% slower on large ones. |
| 1963 | // The cld() instruction must have been emitted, to set the direction flag(), |
| 1964 | // before calling this function. |
| 1965 | void MacroAssembler::CopyBytes(Register source, |
| 1966 | Register destination, |
| 1967 | Register length, |
| 1968 | Register scratch) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1969 | Label short_loop, len4, len8, len12, done, short_string; |
| 1970 | DCHECK(source.is(esi)); |
| 1971 | DCHECK(destination.is(edi)); |
| 1972 | DCHECK(length.is(ecx)); |
| 1973 | cmp(length, Immediate(4)); |
| 1974 | j(below, &short_string, Label::kNear); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1975 | |
| 1976 | // Because source is 4-byte aligned in our uses of this function, |
| 1977 | // we keep source aligned for the rep_movs call by copying the odd bytes |
| 1978 | // at the end of the ranges. |
| 1979 | mov(scratch, Operand(source, length, times_1, -4)); |
| 1980 | mov(Operand(destination, length, times_1, -4), scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1981 | |
| 1982 | cmp(length, Immediate(8)); |
| 1983 | j(below_equal, &len4, Label::kNear); |
| 1984 | cmp(length, Immediate(12)); |
| 1985 | j(below_equal, &len8, Label::kNear); |
| 1986 | cmp(length, Immediate(16)); |
| 1987 | j(below_equal, &len12, Label::kNear); |
| 1988 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1989 | mov(scratch, ecx); |
| 1990 | shr(ecx, 2); |
| 1991 | rep_movs(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1992 | and_(scratch, Immediate(0x3)); |
| 1993 | add(destination, scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1994 | jmp(&done, Label::kNear); |
| 1995 | |
| 1996 | bind(&len12); |
| 1997 | mov(scratch, Operand(source, 8)); |
| 1998 | mov(Operand(destination, 8), scratch); |
| 1999 | bind(&len8); |
| 2000 | mov(scratch, Operand(source, 4)); |
| 2001 | mov(Operand(destination, 4), scratch); |
| 2002 | bind(&len4); |
| 2003 | mov(scratch, Operand(source, 0)); |
| 2004 | mov(Operand(destination, 0), scratch); |
| 2005 | add(destination, length); |
| 2006 | jmp(&done, Label::kNear); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2007 | |
| 2008 | bind(&short_string); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2009 | test(length, length); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2010 | j(zero, &done, Label::kNear); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2011 | |
| 2012 | bind(&short_loop); |
| 2013 | mov_b(scratch, Operand(source, 0)); |
| 2014 | mov_b(Operand(destination, 0), scratch); |
| 2015 | inc(source); |
| 2016 | inc(destination); |
| 2017 | dec(length); |
| 2018 | j(not_zero, &short_loop); |
| 2019 | |
| 2020 | bind(&done); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2021 | } |
| 2022 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2023 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2024 | void MacroAssembler::InitializeFieldsWithFiller(Register current_address, |
| 2025 | Register end_address, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2026 | Register filler) { |
| 2027 | Label loop, entry; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2028 | jmp(&entry, Label::kNear); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2029 | bind(&loop); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2030 | mov(Operand(current_address, 0), filler); |
| 2031 | add(current_address, Immediate(kPointerSize)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2032 | bind(&entry); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2033 | cmp(current_address, end_address); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2034 | j(below, &loop, Label::kNear); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2035 | } |
| 2036 | |
| 2037 | |
| 2038 | void MacroAssembler::BooleanBitTest(Register object, |
| 2039 | int field_offset, |
| 2040 | int bit_index) { |
| 2041 | bit_index += kSmiTagSize + kSmiShiftSize; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2042 | DCHECK(base::bits::IsPowerOfTwo32(kBitsPerByte)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2043 | int byte_index = bit_index / kBitsPerByte; |
| 2044 | int byte_bit_index = bit_index & (kBitsPerByte - 1); |
| 2045 | test_b(FieldOperand(object, field_offset + byte_index), |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 2046 | Immediate(1 << byte_bit_index)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2047 | } |
| 2048 | |
| 2049 | |
| 2050 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2051 | void MacroAssembler::NegativeZeroTest(Register result, |
| 2052 | Register op, |
| 2053 | Label* then_label) { |
| 2054 | Label ok; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2055 | test(result, result); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2056 | j(not_zero, &ok, Label::kNear); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2057 | test(op, op); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2058 | j(sign, then_label, Label::kNear); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2059 | bind(&ok); |
| 2060 | } |
| 2061 | |
| 2062 | |
| 2063 | void MacroAssembler::NegativeZeroTest(Register result, |
| 2064 | Register op1, |
| 2065 | Register op2, |
| 2066 | Register scratch, |
| 2067 | Label* then_label) { |
| 2068 | Label ok; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2069 | test(result, result); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2070 | j(not_zero, &ok, Label::kNear); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2071 | mov(scratch, op1); |
| 2072 | or_(scratch, op2); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2073 | j(sign, then_label, Label::kNear); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2074 | bind(&ok); |
| 2075 | } |
| 2076 | |
| 2077 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2078 | void MacroAssembler::GetMapConstructor(Register result, Register map, |
| 2079 | Register temp) { |
| 2080 | Label done, loop; |
| 2081 | mov(result, FieldOperand(map, Map::kConstructorOrBackPointerOffset)); |
| 2082 | bind(&loop); |
| 2083 | JumpIfSmi(result, &done, Label::kNear); |
| 2084 | CmpObjectType(result, MAP_TYPE, temp); |
| 2085 | j(not_equal, &done, Label::kNear); |
| 2086 | mov(result, FieldOperand(result, Map::kConstructorOrBackPointerOffset)); |
| 2087 | jmp(&loop); |
| 2088 | bind(&done); |
| 2089 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2090 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2091 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2092 | void MacroAssembler::TryGetFunctionPrototype(Register function, Register result, |
| 2093 | Register scratch, Label* miss) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2094 | // Get the prototype or initial map from the function. |
| 2095 | mov(result, |
| 2096 | FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 2097 | |
| 2098 | // If the prototype or initial map is the hole, don't return it and |
| 2099 | // simply miss the cache instead. This will allow us to allocate a |
| 2100 | // prototype object on-demand in the runtime system. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2101 | cmp(result, Immediate(isolate()->factory()->the_hole_value())); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2102 | j(equal, miss); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2103 | |
| 2104 | // If the function does not have an initial map, we're done. |
| 2105 | Label done; |
| 2106 | CmpObjectType(result, MAP_TYPE, scratch); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2107 | j(not_equal, &done, Label::kNear); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2108 | |
| 2109 | // Get the prototype from the initial map. |
| 2110 | mov(result, FieldOperand(result, Map::kPrototypeOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2111 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2112 | // All done. |
| 2113 | bind(&done); |
| 2114 | } |
| 2115 | |
| 2116 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2117 | void MacroAssembler::CallStub(CodeStub* stub, TypeFeedbackId ast_id) { |
| 2118 | DCHECK(AllowThisStubCall(stub)); // Calls are not allowed in some stubs. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2119 | call(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2120 | } |
| 2121 | |
| 2122 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2123 | void MacroAssembler::TailCallStub(CodeStub* stub) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2124 | jmp(stub->GetCode(), RelocInfo::CODE_TARGET); |
| 2125 | } |
| 2126 | |
| 2127 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2128 | void MacroAssembler::StubReturn(int argc) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2129 | DCHECK(argc >= 1 && generating_stub()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2130 | ret((argc - 1) * kPointerSize); |
| 2131 | } |
| 2132 | |
| 2133 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2134 | bool MacroAssembler::AllowThisStubCall(CodeStub* stub) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2135 | return has_frame_ || !stub->SometimesSetsUpAFrame(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2136 | } |
| 2137 | |
| 2138 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2139 | void MacroAssembler::IndexFromHash(Register hash, Register index) { |
| 2140 | // The assert checks that the constants for the maximum number of digits |
| 2141 | // for an array index cached in the hash field and the number of bits |
| 2142 | // reserved for it does not conflict. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2143 | DCHECK(TenToThe(String::kMaxCachedArrayIndexLength) < |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2144 | (1 << String::kArrayIndexValueBits)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2145 | if (!index.is(hash)) { |
| 2146 | mov(index, hash); |
| 2147 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2148 | DecodeFieldToSmi<String::ArrayIndexValueBits>(index); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2149 | } |
| 2150 | |
| 2151 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2152 | void MacroAssembler::CallRuntime(const Runtime::Function* f, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2153 | int num_arguments, |
| 2154 | SaveFPRegsMode save_doubles) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2155 | // If the expected number of arguments of the runtime function is |
| 2156 | // constant, we check that the actual number of arguments match the |
| 2157 | // expectation. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2158 | CHECK(f->nargs < 0 || f->nargs == num_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2159 | |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 2160 | // TODO(1236192): Most runtime routines don't need the number of |
| 2161 | // arguments passed in because it is constant. At some point we |
| 2162 | // should remove this need and make the runtime routine entry code |
| 2163 | // smarter. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2164 | Move(eax, Immediate(num_arguments)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2165 | mov(ebx, Immediate(ExternalReference(f, isolate()))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2166 | CEntryStub ces(isolate(), 1, save_doubles); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 2167 | CallStub(&ces); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2168 | } |
| 2169 | |
| 2170 | |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 2171 | void MacroAssembler::CallExternalReference(ExternalReference ref, |
| 2172 | int num_arguments) { |
| 2173 | mov(eax, Immediate(num_arguments)); |
| 2174 | mov(ebx, Immediate(ref)); |
| 2175 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2176 | CEntryStub stub(isolate(), 1); |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 2177 | CallStub(&stub); |
| 2178 | } |
| 2179 | |
| 2180 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2181 | void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid) { |
| 2182 | // ----------- S t a t e ------------- |
| 2183 | // -- esp[0] : return address |
| 2184 | // -- esp[8] : argument num_arguments - 1 |
| 2185 | // ... |
| 2186 | // -- esp[8 * num_arguments] : argument 0 (receiver) |
| 2187 | // |
| 2188 | // For runtime functions with variable arguments: |
| 2189 | // -- eax : number of arguments |
| 2190 | // ----------------------------------- |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2191 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2192 | const Runtime::Function* function = Runtime::FunctionForId(fid); |
| 2193 | DCHECK_EQ(1, function->result_size); |
| 2194 | if (function->nargs >= 0) { |
| 2195 | // TODO(1236192): Most runtime routines don't need the number of |
| 2196 | // arguments passed in because it is constant. At some point we |
| 2197 | // should remove this need and make the runtime routine entry code |
| 2198 | // smarter. |
| 2199 | mov(eax, Immediate(function->nargs)); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2200 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2201 | JumpToExternalReference(ExternalReference(fid, isolate())); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2202 | } |
| 2203 | |
| 2204 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2205 | void MacroAssembler::JumpToExternalReference(const ExternalReference& ext) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2206 | // Set the entry point and jump to the C entry runtime stub. |
| 2207 | mov(ebx, Immediate(ext)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2208 | CEntryStub ces(isolate(), 1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2209 | jmp(ces.GetCode(), RelocInfo::CODE_TARGET); |
| 2210 | } |
| 2211 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 2212 | void MacroAssembler::PrepareForTailCall( |
| 2213 | const ParameterCount& callee_args_count, Register caller_args_count_reg, |
| 2214 | Register scratch0, Register scratch1, ReturnAddressState ra_state, |
| 2215 | int number_of_temp_values_after_return_address) { |
| 2216 | #if DEBUG |
| 2217 | if (callee_args_count.is_reg()) { |
| 2218 | DCHECK(!AreAliased(callee_args_count.reg(), caller_args_count_reg, scratch0, |
| 2219 | scratch1)); |
| 2220 | } else { |
| 2221 | DCHECK(!AreAliased(caller_args_count_reg, scratch0, scratch1)); |
| 2222 | } |
| 2223 | DCHECK(ra_state != ReturnAddressState::kNotOnStack || |
| 2224 | number_of_temp_values_after_return_address == 0); |
| 2225 | #endif |
| 2226 | |
| 2227 | // Calculate the destination address where we will put the return address |
| 2228 | // after we drop current frame. |
| 2229 | Register new_sp_reg = scratch0; |
| 2230 | if (callee_args_count.is_reg()) { |
| 2231 | sub(caller_args_count_reg, callee_args_count.reg()); |
| 2232 | lea(new_sp_reg, |
| 2233 | Operand(ebp, caller_args_count_reg, times_pointer_size, |
| 2234 | StandardFrameConstants::kCallerPCOffset - |
| 2235 | number_of_temp_values_after_return_address * kPointerSize)); |
| 2236 | } else { |
| 2237 | lea(new_sp_reg, Operand(ebp, caller_args_count_reg, times_pointer_size, |
| 2238 | StandardFrameConstants::kCallerPCOffset - |
| 2239 | (callee_args_count.immediate() + |
| 2240 | number_of_temp_values_after_return_address) * |
| 2241 | kPointerSize)); |
| 2242 | } |
| 2243 | |
| 2244 | if (FLAG_debug_code) { |
| 2245 | cmp(esp, new_sp_reg); |
| 2246 | Check(below, kStackAccessBelowStackPointer); |
| 2247 | } |
| 2248 | |
| 2249 | // Copy return address from caller's frame to current frame's return address |
| 2250 | // to avoid its trashing and let the following loop copy it to the right |
| 2251 | // place. |
| 2252 | Register tmp_reg = scratch1; |
| 2253 | if (ra_state == ReturnAddressState::kOnStack) { |
| 2254 | mov(tmp_reg, Operand(ebp, StandardFrameConstants::kCallerPCOffset)); |
| 2255 | mov(Operand(esp, number_of_temp_values_after_return_address * kPointerSize), |
| 2256 | tmp_reg); |
| 2257 | } else { |
| 2258 | DCHECK(ReturnAddressState::kNotOnStack == ra_state); |
| 2259 | DCHECK_EQ(0, number_of_temp_values_after_return_address); |
| 2260 | Push(Operand(ebp, StandardFrameConstants::kCallerPCOffset)); |
| 2261 | } |
| 2262 | |
| 2263 | // Restore caller's frame pointer now as it could be overwritten by |
| 2264 | // the copying loop. |
| 2265 | mov(ebp, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 2266 | |
| 2267 | // +2 here is to copy both receiver and return address. |
| 2268 | Register count_reg = caller_args_count_reg; |
| 2269 | if (callee_args_count.is_reg()) { |
| 2270 | lea(count_reg, Operand(callee_args_count.reg(), |
| 2271 | 2 + number_of_temp_values_after_return_address)); |
| 2272 | } else { |
| 2273 | mov(count_reg, Immediate(callee_args_count.immediate() + 2 + |
| 2274 | number_of_temp_values_after_return_address)); |
| 2275 | // TODO(ishell): Unroll copying loop for small immediate values. |
| 2276 | } |
| 2277 | |
| 2278 | // Now copy callee arguments to the caller frame going backwards to avoid |
| 2279 | // callee arguments corruption (source and destination areas could overlap). |
| 2280 | Label loop, entry; |
| 2281 | jmp(&entry, Label::kNear); |
| 2282 | bind(&loop); |
| 2283 | dec(count_reg); |
| 2284 | mov(tmp_reg, Operand(esp, count_reg, times_pointer_size, 0)); |
| 2285 | mov(Operand(new_sp_reg, count_reg, times_pointer_size, 0), tmp_reg); |
| 2286 | bind(&entry); |
| 2287 | cmp(count_reg, Immediate(0)); |
| 2288 | j(not_equal, &loop, Label::kNear); |
| 2289 | |
| 2290 | // Leave current frame. |
| 2291 | mov(esp, new_sp_reg); |
| 2292 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2293 | |
| 2294 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 2295 | const ParameterCount& actual, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2296 | Label* done, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2297 | bool* definitely_mismatches, |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2298 | InvokeFlag flag, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2299 | Label::Distance done_near, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2300 | const CallWrapper& call_wrapper) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2301 | bool definitely_matches = false; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2302 | *definitely_mismatches = false; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2303 | Label invoke; |
| 2304 | if (expected.is_immediate()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2305 | DCHECK(actual.is_immediate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2306 | mov(eax, actual.immediate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2307 | if (expected.immediate() == actual.immediate()) { |
| 2308 | definitely_matches = true; |
| 2309 | } else { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2310 | const int sentinel = SharedFunctionInfo::kDontAdaptArgumentsSentinel; |
| 2311 | if (expected.immediate() == sentinel) { |
| 2312 | // Don't worry about adapting arguments for builtins that |
| 2313 | // don't want that done. Skip adaption code by making it look |
| 2314 | // like we have a match between expected and actual number of |
| 2315 | // arguments. |
| 2316 | definitely_matches = true; |
| 2317 | } else { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2318 | *definitely_mismatches = true; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2319 | mov(ebx, expected.immediate()); |
| 2320 | } |
| 2321 | } |
| 2322 | } else { |
| 2323 | if (actual.is_immediate()) { |
| 2324 | // Expected is in register, actual is immediate. This is the |
| 2325 | // case when we invoke function values without going through the |
| 2326 | // IC mechanism. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2327 | mov(eax, actual.immediate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2328 | cmp(expected.reg(), actual.immediate()); |
| 2329 | j(equal, &invoke); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2330 | DCHECK(expected.reg().is(ebx)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2331 | } else if (!expected.reg().is(actual.reg())) { |
| 2332 | // Both expected and actual are in (different) registers. This |
| 2333 | // is the case when we invoke functions using call and apply. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2334 | cmp(expected.reg(), actual.reg()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2335 | j(equal, &invoke); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2336 | DCHECK(actual.reg().is(eax)); |
| 2337 | DCHECK(expected.reg().is(ebx)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2338 | } else { |
| 2339 | Move(eax, actual.reg()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2340 | } |
| 2341 | } |
| 2342 | |
| 2343 | if (!definitely_matches) { |
| 2344 | Handle<Code> adaptor = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2345 | isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2346 | if (flag == CALL_FUNCTION) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2347 | call_wrapper.BeforeCall(CallSize(adaptor, RelocInfo::CODE_TARGET)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2348 | call(adaptor, RelocInfo::CODE_TARGET); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2349 | call_wrapper.AfterCall(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2350 | if (!*definitely_mismatches) { |
| 2351 | jmp(done, done_near); |
| 2352 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2353 | } else { |
| 2354 | jmp(adaptor, RelocInfo::CODE_TARGET); |
| 2355 | } |
| 2356 | bind(&invoke); |
| 2357 | } |
| 2358 | } |
| 2359 | |
| 2360 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2361 | void MacroAssembler::FloodFunctionIfStepping(Register fun, Register new_target, |
| 2362 | const ParameterCount& expected, |
| 2363 | const ParameterCount& actual) { |
| 2364 | Label skip_flooding; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2365 | ExternalReference last_step_action = |
| 2366 | ExternalReference::debug_last_step_action_address(isolate()); |
| 2367 | STATIC_ASSERT(StepFrame > StepIn); |
| 2368 | cmpb(Operand::StaticVariable(last_step_action), Immediate(StepIn)); |
| 2369 | j(less, &skip_flooding); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2370 | { |
| 2371 | FrameScope frame(this, |
| 2372 | has_frame() ? StackFrame::NONE : StackFrame::INTERNAL); |
| 2373 | if (expected.is_reg()) { |
| 2374 | SmiTag(expected.reg()); |
| 2375 | Push(expected.reg()); |
| 2376 | } |
| 2377 | if (actual.is_reg()) { |
| 2378 | SmiTag(actual.reg()); |
| 2379 | Push(actual.reg()); |
| 2380 | } |
| 2381 | if (new_target.is_valid()) { |
| 2382 | Push(new_target); |
| 2383 | } |
| 2384 | Push(fun); |
| 2385 | Push(fun); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2386 | CallRuntime(Runtime::kDebugPrepareStepInIfStepping); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2387 | Pop(fun); |
| 2388 | if (new_target.is_valid()) { |
| 2389 | Pop(new_target); |
| 2390 | } |
| 2391 | if (actual.is_reg()) { |
| 2392 | Pop(actual.reg()); |
| 2393 | SmiUntag(actual.reg()); |
| 2394 | } |
| 2395 | if (expected.is_reg()) { |
| 2396 | Pop(expected.reg()); |
| 2397 | SmiUntag(expected.reg()); |
| 2398 | } |
| 2399 | } |
| 2400 | bind(&skip_flooding); |
| 2401 | } |
| 2402 | |
| 2403 | |
| 2404 | void MacroAssembler::InvokeFunctionCode(Register function, Register new_target, |
| 2405 | const ParameterCount& expected, |
| 2406 | const ParameterCount& actual, |
| 2407 | InvokeFlag flag, |
| 2408 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2409 | // You can't call a function without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2410 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2411 | DCHECK(function.is(edi)); |
| 2412 | DCHECK_IMPLIES(new_target.is_valid(), new_target.is(edx)); |
| 2413 | |
| 2414 | if (call_wrapper.NeedsDebugStepCheck()) { |
| 2415 | FloodFunctionIfStepping(function, new_target, expected, actual); |
| 2416 | } |
| 2417 | |
| 2418 | // Clear the new.target register if not given. |
| 2419 | if (!new_target.is_valid()) { |
| 2420 | mov(edx, isolate()->factory()->undefined_value()); |
| 2421 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2422 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2423 | Label done; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2424 | bool definitely_mismatches = false; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2425 | InvokePrologue(expected, actual, &done, &definitely_mismatches, flag, |
| 2426 | Label::kNear, call_wrapper); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2427 | if (!definitely_mismatches) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2428 | // We call indirectly through the code field in the function to |
| 2429 | // allow recompilation to take effect without changing any of the |
| 2430 | // call sites. |
| 2431 | Operand code = FieldOperand(function, JSFunction::kCodeEntryOffset); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2432 | if (flag == CALL_FUNCTION) { |
| 2433 | call_wrapper.BeforeCall(CallSize(code)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2434 | call(code); |
| 2435 | call_wrapper.AfterCall(); |
| 2436 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2437 | DCHECK(flag == JUMP_FUNCTION); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2438 | jmp(code); |
| 2439 | } |
| 2440 | bind(&done); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2441 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2442 | } |
| 2443 | |
| 2444 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2445 | void MacroAssembler::InvokeFunction(Register fun, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2446 | Register new_target, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2447 | const ParameterCount& actual, |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2448 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2449 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2450 | // You can't call a function without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2451 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2452 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2453 | DCHECK(fun.is(edi)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2454 | mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2455 | mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2456 | mov(ebx, FieldOperand(ebx, SharedFunctionInfo::kFormalParameterCountOffset)); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2457 | SmiUntag(ebx); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2458 | |
| 2459 | ParameterCount expected(ebx); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2460 | InvokeFunctionCode(edi, new_target, expected, actual, flag, call_wrapper); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2461 | } |
| 2462 | |
| 2463 | |
| 2464 | void MacroAssembler::InvokeFunction(Register fun, |
| 2465 | const ParameterCount& expected, |
| 2466 | const ParameterCount& actual, |
| 2467 | InvokeFlag flag, |
| 2468 | const CallWrapper& call_wrapper) { |
| 2469 | // You can't call a function without a valid frame. |
| 2470 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
| 2471 | |
| 2472 | DCHECK(fun.is(edi)); |
| 2473 | mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| 2474 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2475 | InvokeFunctionCode(edi, no_reg, expected, actual, flag, call_wrapper); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2476 | } |
| 2477 | |
| 2478 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2479 | void MacroAssembler::InvokeFunction(Handle<JSFunction> function, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2480 | const ParameterCount& expected, |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2481 | const ParameterCount& actual, |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2482 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2483 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2484 | LoadHeapObject(edi, function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2485 | InvokeFunction(edi, expected, actual, flag, call_wrapper); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2486 | } |
| 2487 | |
| 2488 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2489 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 2490 | if (context_chain_length > 0) { |
| 2491 | // Move up the chain of contexts to the context containing the slot. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2492 | mov(dst, Operand(esi, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2493 | for (int i = 1; i < context_chain_length; i++) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2494 | mov(dst, Operand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2495 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2496 | } else { |
| 2497 | // Slot is in the current function context. Move it into the |
| 2498 | // destination register in case we store into it (the write barrier |
| 2499 | // cannot be allowed to destroy the context in esi). |
| 2500 | mov(dst, esi); |
| 2501 | } |
| 2502 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2503 | // We should not have found a with context by walking the context chain |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2504 | // (i.e., the static scope chain and runtime context chain do not agree). |
| 2505 | // A variable occurring in such a scope should have slot type LOOKUP and |
| 2506 | // not CONTEXT. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2507 | if (emit_debug_code()) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2508 | cmp(FieldOperand(dst, HeapObject::kMapOffset), |
| 2509 | isolate()->factory()->with_context_map()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2510 | Check(not_equal, kVariableResolvedToWithContext); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2511 | } |
| 2512 | } |
| 2513 | |
| 2514 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2515 | void MacroAssembler::LoadGlobalProxy(Register dst) { |
| 2516 | mov(dst, NativeContextOperand()); |
| 2517 | mov(dst, ContextOperand(dst, Context::GLOBAL_PROXY_INDEX)); |
| 2518 | } |
| 2519 | |
| 2520 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2521 | void MacroAssembler::LoadTransitionedArrayMapConditional( |
| 2522 | ElementsKind expected_kind, |
| 2523 | ElementsKind transitioned_kind, |
| 2524 | Register map_in_out, |
| 2525 | Register scratch, |
| 2526 | Label* no_map_match) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2527 | DCHECK(IsFastElementsKind(expected_kind)); |
| 2528 | DCHECK(IsFastElementsKind(transitioned_kind)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2529 | |
| 2530 | // Check that the function's map is the same as the expected cached map. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2531 | mov(scratch, NativeContextOperand()); |
| 2532 | cmp(map_in_out, |
| 2533 | ContextOperand(scratch, Context::ArrayMapIndex(expected_kind))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2534 | j(not_equal, no_map_match); |
| 2535 | |
| 2536 | // Use the transitioned cached map. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2537 | mov(map_in_out, |
| 2538 | ContextOperand(scratch, Context::ArrayMapIndex(transitioned_kind))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2539 | } |
| 2540 | |
| 2541 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2542 | void MacroAssembler::LoadGlobalFunction(int index, Register function) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2543 | // Load the native context from the current context. |
| 2544 | mov(function, NativeContextOperand()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2545 | // Load the function from the native context. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2546 | mov(function, ContextOperand(function, index)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2547 | } |
| 2548 | |
| 2549 | |
| 2550 | void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, |
| 2551 | Register map) { |
| 2552 | // Load the initial map. The global functions all have initial maps. |
| 2553 | mov(map, FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2554 | if (emit_debug_code()) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2555 | Label ok, fail; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2556 | CheckMap(map, isolate()->factory()->meta_map(), &fail, DO_SMI_CHECK); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2557 | jmp(&ok); |
| 2558 | bind(&fail); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2559 | Abort(kGlobalFunctionsMustHaveInitialMap); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2560 | bind(&ok); |
| 2561 | } |
| 2562 | } |
| 2563 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2564 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2565 | // Store the value in register src in the safepoint register stack |
| 2566 | // slot for register dst. |
| 2567 | void MacroAssembler::StoreToSafepointRegisterSlot(Register dst, Register src) { |
| 2568 | mov(SafepointRegisterSlot(dst), src); |
| 2569 | } |
| 2570 | |
| 2571 | |
| 2572 | void MacroAssembler::StoreToSafepointRegisterSlot(Register dst, Immediate src) { |
| 2573 | mov(SafepointRegisterSlot(dst), src); |
| 2574 | } |
| 2575 | |
| 2576 | |
| 2577 | void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) { |
| 2578 | mov(dst, SafepointRegisterSlot(src)); |
| 2579 | } |
| 2580 | |
| 2581 | |
| 2582 | Operand MacroAssembler::SafepointRegisterSlot(Register reg) { |
| 2583 | return Operand(esp, SafepointRegisterStackIndex(reg.code()) * kPointerSize); |
| 2584 | } |
| 2585 | |
| 2586 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2587 | int MacroAssembler::SafepointRegisterStackIndex(int reg_code) { |
| 2588 | // The registers are pushed starting with the lowest encoding, |
| 2589 | // which means that lowest encodings are furthest away from |
| 2590 | // the stack pointer. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2591 | DCHECK(reg_code >= 0 && reg_code < kNumSafepointRegisters); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2592 | return kNumSafepointRegisters - reg_code - 1; |
| 2593 | } |
| 2594 | |
| 2595 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2596 | void MacroAssembler::LoadHeapObject(Register result, |
| 2597 | Handle<HeapObject> object) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2598 | AllowDeferredHandleDereference embedding_raw_address; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2599 | if (isolate()->heap()->InNewSpace(*object)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2600 | Handle<Cell> cell = isolate()->factory()->NewCell(object); |
| 2601 | mov(result, Operand::ForCell(cell)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2602 | } else { |
| 2603 | mov(result, object); |
| 2604 | } |
| 2605 | } |
| 2606 | |
| 2607 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2608 | void MacroAssembler::CmpHeapObject(Register reg, Handle<HeapObject> object) { |
| 2609 | AllowDeferredHandleDereference using_raw_address; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2610 | if (isolate()->heap()->InNewSpace(*object)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2611 | Handle<Cell> cell = isolate()->factory()->NewCell(object); |
| 2612 | cmp(reg, Operand::ForCell(cell)); |
| 2613 | } else { |
| 2614 | cmp(reg, object); |
| 2615 | } |
| 2616 | } |
| 2617 | |
| 2618 | |
| 2619 | void MacroAssembler::PushHeapObject(Handle<HeapObject> object) { |
| 2620 | AllowDeferredHandleDereference using_raw_address; |
| 2621 | if (isolate()->heap()->InNewSpace(*object)) { |
| 2622 | Handle<Cell> cell = isolate()->factory()->NewCell(object); |
| 2623 | push(Operand::ForCell(cell)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2624 | } else { |
| 2625 | Push(object); |
| 2626 | } |
| 2627 | } |
| 2628 | |
| 2629 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2630 | void MacroAssembler::CmpWeakValue(Register value, Handle<WeakCell> cell, |
| 2631 | Register scratch) { |
| 2632 | mov(scratch, cell); |
| 2633 | cmp(value, FieldOperand(scratch, WeakCell::kValueOffset)); |
| 2634 | } |
| 2635 | |
| 2636 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2637 | void MacroAssembler::GetWeakValue(Register value, Handle<WeakCell> cell) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2638 | mov(value, cell); |
| 2639 | mov(value, FieldOperand(value, WeakCell::kValueOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2640 | } |
| 2641 | |
| 2642 | |
| 2643 | void MacroAssembler::LoadWeakValue(Register value, Handle<WeakCell> cell, |
| 2644 | Label* miss) { |
| 2645 | GetWeakValue(value, cell); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2646 | JumpIfSmi(value, miss); |
| 2647 | } |
| 2648 | |
| 2649 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2650 | void MacroAssembler::Ret() { |
| 2651 | ret(0); |
| 2652 | } |
| 2653 | |
| 2654 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2655 | void MacroAssembler::Ret(int bytes_dropped, Register scratch) { |
| 2656 | if (is_uint16(bytes_dropped)) { |
| 2657 | ret(bytes_dropped); |
| 2658 | } else { |
| 2659 | pop(scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2660 | add(esp, Immediate(bytes_dropped)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2661 | push(scratch); |
| 2662 | ret(0); |
| 2663 | } |
| 2664 | } |
| 2665 | |
| 2666 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2667 | void MacroAssembler::Drop(int stack_elements) { |
| 2668 | if (stack_elements > 0) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2669 | add(esp, Immediate(stack_elements * kPointerSize)); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2670 | } |
| 2671 | } |
| 2672 | |
| 2673 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2674 | void MacroAssembler::Move(Register dst, Register src) { |
| 2675 | if (!dst.is(src)) { |
| 2676 | mov(dst, src); |
| 2677 | } |
| 2678 | } |
| 2679 | |
| 2680 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2681 | void MacroAssembler::Move(Register dst, const Immediate& x) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2682 | if (x.is_zero() && RelocInfo::IsNone(x.rmode_)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2683 | xor_(dst, dst); // Shorter than mov of 32-bit immediate 0. |
| 2684 | } else { |
| 2685 | mov(dst, x); |
| 2686 | } |
| 2687 | } |
| 2688 | |
| 2689 | |
| 2690 | void MacroAssembler::Move(const Operand& dst, const Immediate& x) { |
| 2691 | mov(dst, x); |
| 2692 | } |
| 2693 | |
| 2694 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2695 | void MacroAssembler::Move(XMMRegister dst, uint32_t src) { |
| 2696 | if (src == 0) { |
| 2697 | pxor(dst, dst); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2698 | } else { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2699 | unsigned cnt = base::bits::CountPopulation32(src); |
| 2700 | unsigned nlz = base::bits::CountLeadingZeros32(src); |
| 2701 | unsigned ntz = base::bits::CountTrailingZeros32(src); |
| 2702 | if (nlz + cnt + ntz == 32) { |
| 2703 | pcmpeqd(dst, dst); |
| 2704 | if (ntz == 0) { |
| 2705 | psrld(dst, 32 - cnt); |
| 2706 | } else { |
| 2707 | pslld(dst, 32 - cnt); |
| 2708 | if (nlz != 0) psrld(dst, nlz); |
| 2709 | } |
| 2710 | } else { |
| 2711 | push(eax); |
| 2712 | mov(eax, Immediate(src)); |
| 2713 | movd(dst, Operand(eax)); |
| 2714 | pop(eax); |
| 2715 | } |
| 2716 | } |
| 2717 | } |
| 2718 | |
| 2719 | |
| 2720 | void MacroAssembler::Move(XMMRegister dst, uint64_t src) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2721 | if (src == 0) { |
| 2722 | pxor(dst, dst); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2723 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2724 | uint32_t lower = static_cast<uint32_t>(src); |
| 2725 | uint32_t upper = static_cast<uint32_t>(src >> 32); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2726 | unsigned cnt = base::bits::CountPopulation64(src); |
| 2727 | unsigned nlz = base::bits::CountLeadingZeros64(src); |
| 2728 | unsigned ntz = base::bits::CountTrailingZeros64(src); |
| 2729 | if (nlz + cnt + ntz == 64) { |
| 2730 | pcmpeqd(dst, dst); |
| 2731 | if (ntz == 0) { |
| 2732 | psrlq(dst, 64 - cnt); |
| 2733 | } else { |
| 2734 | psllq(dst, 64 - cnt); |
| 2735 | if (nlz != 0) psrlq(dst, nlz); |
| 2736 | } |
| 2737 | } else if (lower == 0) { |
| 2738 | Move(dst, upper); |
| 2739 | psllq(dst, 32); |
| 2740 | } else if (CpuFeatures::IsSupported(SSE4_1)) { |
| 2741 | CpuFeatureScope scope(this, SSE4_1); |
| 2742 | push(eax); |
| 2743 | Move(eax, Immediate(lower)); |
| 2744 | movd(dst, Operand(eax)); |
| 2745 | Move(eax, Immediate(upper)); |
| 2746 | pinsrd(dst, Operand(eax), 1); |
| 2747 | pop(eax); |
| 2748 | } else { |
| 2749 | push(Immediate(upper)); |
| 2750 | push(Immediate(lower)); |
| 2751 | movsd(dst, Operand(esp, 0)); |
| 2752 | add(esp, Immediate(kDoubleSize)); |
| 2753 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2754 | } |
| 2755 | } |
| 2756 | |
| 2757 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2758 | void MacroAssembler::Pextrd(Register dst, XMMRegister src, int8_t imm8) { |
| 2759 | if (imm8 == 0) { |
| 2760 | movd(dst, src); |
| 2761 | return; |
| 2762 | } |
| 2763 | DCHECK_EQ(1, imm8); |
| 2764 | if (CpuFeatures::IsSupported(SSE4_1)) { |
| 2765 | CpuFeatureScope sse_scope(this, SSE4_1); |
| 2766 | pextrd(dst, src, imm8); |
| 2767 | return; |
| 2768 | } |
| 2769 | pshufd(xmm0, src, 1); |
| 2770 | movd(dst, xmm0); |
| 2771 | } |
| 2772 | |
| 2773 | |
| 2774 | void MacroAssembler::Pinsrd(XMMRegister dst, const Operand& src, int8_t imm8) { |
| 2775 | DCHECK(imm8 == 0 || imm8 == 1); |
| 2776 | if (CpuFeatures::IsSupported(SSE4_1)) { |
| 2777 | CpuFeatureScope sse_scope(this, SSE4_1); |
| 2778 | pinsrd(dst, src, imm8); |
| 2779 | return; |
| 2780 | } |
| 2781 | movd(xmm0, src); |
| 2782 | if (imm8 == 1) { |
| 2783 | punpckldq(dst, xmm0); |
| 2784 | } else { |
| 2785 | DCHECK_EQ(0, imm8); |
| 2786 | psrlq(dst, 32); |
| 2787 | punpckldq(xmm0, dst); |
| 2788 | movaps(dst, xmm0); |
| 2789 | } |
| 2790 | } |
| 2791 | |
| 2792 | |
| 2793 | void MacroAssembler::Lzcnt(Register dst, const Operand& src) { |
| 2794 | if (CpuFeatures::IsSupported(LZCNT)) { |
| 2795 | CpuFeatureScope scope(this, LZCNT); |
| 2796 | lzcnt(dst, src); |
| 2797 | return; |
| 2798 | } |
| 2799 | Label not_zero_src; |
| 2800 | bsr(dst, src); |
| 2801 | j(not_zero, ¬_zero_src, Label::kNear); |
| 2802 | Move(dst, Immediate(63)); // 63^31 == 32 |
| 2803 | bind(¬_zero_src); |
| 2804 | xor_(dst, Immediate(31)); // for x in [0..31], 31^x == 31-x. |
| 2805 | } |
| 2806 | |
| 2807 | |
| 2808 | void MacroAssembler::Tzcnt(Register dst, const Operand& src) { |
| 2809 | if (CpuFeatures::IsSupported(BMI1)) { |
| 2810 | CpuFeatureScope scope(this, BMI1); |
| 2811 | tzcnt(dst, src); |
| 2812 | return; |
| 2813 | } |
| 2814 | Label not_zero_src; |
| 2815 | bsf(dst, src); |
| 2816 | j(not_zero, ¬_zero_src, Label::kNear); |
| 2817 | Move(dst, Immediate(32)); // The result of tzcnt is 32 if src = 0. |
| 2818 | bind(¬_zero_src); |
| 2819 | } |
| 2820 | |
| 2821 | |
| 2822 | void MacroAssembler::Popcnt(Register dst, const Operand& src) { |
| 2823 | if (CpuFeatures::IsSupported(POPCNT)) { |
| 2824 | CpuFeatureScope scope(this, POPCNT); |
| 2825 | popcnt(dst, src); |
| 2826 | return; |
| 2827 | } |
| 2828 | UNREACHABLE(); |
| 2829 | } |
| 2830 | |
| 2831 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2832 | void MacroAssembler::SetCounter(StatsCounter* counter, int value) { |
| 2833 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2834 | mov(Operand::StaticVariable(ExternalReference(counter)), Immediate(value)); |
| 2835 | } |
| 2836 | } |
| 2837 | |
| 2838 | |
| 2839 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2840 | DCHECK(value > 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2841 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2842 | Operand operand = Operand::StaticVariable(ExternalReference(counter)); |
| 2843 | if (value == 1) { |
| 2844 | inc(operand); |
| 2845 | } else { |
| 2846 | add(operand, Immediate(value)); |
| 2847 | } |
| 2848 | } |
| 2849 | } |
| 2850 | |
| 2851 | |
| 2852 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2853 | DCHECK(value > 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2854 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2855 | Operand operand = Operand::StaticVariable(ExternalReference(counter)); |
| 2856 | if (value == 1) { |
| 2857 | dec(operand); |
| 2858 | } else { |
| 2859 | sub(operand, Immediate(value)); |
| 2860 | } |
| 2861 | } |
| 2862 | } |
| 2863 | |
| 2864 | |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2865 | void MacroAssembler::IncrementCounter(Condition cc, |
| 2866 | StatsCounter* counter, |
| 2867 | int value) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2868 | DCHECK(value > 0); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2869 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2870 | Label skip; |
| 2871 | j(NegateCondition(cc), &skip); |
| 2872 | pushfd(); |
| 2873 | IncrementCounter(counter, value); |
| 2874 | popfd(); |
| 2875 | bind(&skip); |
| 2876 | } |
| 2877 | } |
| 2878 | |
| 2879 | |
| 2880 | void MacroAssembler::DecrementCounter(Condition cc, |
| 2881 | StatsCounter* counter, |
| 2882 | int value) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2883 | DCHECK(value > 0); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2884 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2885 | Label skip; |
| 2886 | j(NegateCondition(cc), &skip); |
| 2887 | pushfd(); |
| 2888 | DecrementCounter(counter, value); |
| 2889 | popfd(); |
| 2890 | bind(&skip); |
| 2891 | } |
| 2892 | } |
| 2893 | |
| 2894 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2895 | void MacroAssembler::Assert(Condition cc, BailoutReason reason) { |
| 2896 | if (emit_debug_code()) Check(cc, reason); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2897 | } |
| 2898 | |
| 2899 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2900 | void MacroAssembler::AssertFastElements(Register elements) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2901 | if (emit_debug_code()) { |
| 2902 | Factory* factory = isolate()->factory(); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2903 | Label ok; |
| 2904 | cmp(FieldOperand(elements, HeapObject::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2905 | Immediate(factory->fixed_array_map())); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2906 | j(equal, &ok); |
| 2907 | cmp(FieldOperand(elements, HeapObject::kMapOffset), |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2908 | Immediate(factory->fixed_double_array_map())); |
| 2909 | j(equal, &ok); |
| 2910 | cmp(FieldOperand(elements, HeapObject::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2911 | Immediate(factory->fixed_cow_array_map())); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2912 | j(equal, &ok); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2913 | Abort(kJSObjectWithFastElementsMapHasSlowElements); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2914 | bind(&ok); |
| 2915 | } |
| 2916 | } |
| 2917 | |
| 2918 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2919 | void MacroAssembler::Check(Condition cc, BailoutReason reason) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2920 | Label L; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2921 | j(cc, &L); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2922 | Abort(reason); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2923 | // will not return here |
| 2924 | bind(&L); |
| 2925 | } |
| 2926 | |
| 2927 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2928 | void MacroAssembler::CheckStackAlignment() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2929 | int frame_alignment = base::OS::ActivationFrameAlignment(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2930 | int frame_alignment_mask = frame_alignment - 1; |
| 2931 | if (frame_alignment > kPointerSize) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2932 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2933 | Label alignment_as_expected; |
| 2934 | test(esp, Immediate(frame_alignment_mask)); |
| 2935 | j(zero, &alignment_as_expected); |
| 2936 | // Abort if stack is not aligned. |
| 2937 | int3(); |
| 2938 | bind(&alignment_as_expected); |
| 2939 | } |
| 2940 | } |
| 2941 | |
| 2942 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2943 | void MacroAssembler::Abort(BailoutReason reason) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2944 | #ifdef DEBUG |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2945 | const char* msg = GetBailoutReason(reason); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2946 | if (msg != NULL) { |
| 2947 | RecordComment("Abort message: "); |
| 2948 | RecordComment(msg); |
| 2949 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2950 | |
| 2951 | if (FLAG_trap_on_abort) { |
| 2952 | int3(); |
| 2953 | return; |
| 2954 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2955 | #endif |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2956 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2957 | push(Immediate(reinterpret_cast<intptr_t>(Smi::FromInt(reason)))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2958 | // Disable stub call restrictions to always allow calls to abort. |
| 2959 | if (!has_frame_) { |
| 2960 | // We don't actually want to generate a pile of code for this, so just |
| 2961 | // claim there is a stack frame, without generating one. |
| 2962 | FrameScope scope(this, StackFrame::NONE); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2963 | CallRuntime(Runtime::kAbort); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2964 | } else { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2965 | CallRuntime(Runtime::kAbort); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2966 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2967 | // will not return here |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2968 | int3(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2969 | } |
| 2970 | |
| 2971 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2972 | void MacroAssembler::LoadInstanceDescriptors(Register map, |
| 2973 | Register descriptors) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2974 | mov(descriptors, FieldOperand(map, Map::kDescriptorsOffset)); |
| 2975 | } |
| 2976 | |
| 2977 | |
| 2978 | void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { |
| 2979 | mov(dst, FieldOperand(map, Map::kBitField3Offset)); |
| 2980 | DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2981 | } |
| 2982 | |
| 2983 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2984 | void MacroAssembler::LoadAccessor(Register dst, Register holder, |
| 2985 | int accessor_index, |
| 2986 | AccessorComponent accessor) { |
| 2987 | mov(dst, FieldOperand(holder, HeapObject::kMapOffset)); |
| 2988 | LoadInstanceDescriptors(dst, dst); |
| 2989 | mov(dst, FieldOperand(dst, DescriptorArray::GetValueOffset(accessor_index))); |
| 2990 | int offset = accessor == ACCESSOR_GETTER ? AccessorPair::kGetterOffset |
| 2991 | : AccessorPair::kSetterOffset; |
| 2992 | mov(dst, FieldOperand(dst, offset)); |
| 2993 | } |
| 2994 | |
| 2995 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2996 | void MacroAssembler::LoadPowerOf2(XMMRegister dst, |
| 2997 | Register scratch, |
| 2998 | int power) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2999 | DCHECK(is_uintn(power + HeapNumber::kExponentBias, |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3000 | HeapNumber::kExponentBits)); |
| 3001 | mov(scratch, Immediate(power + HeapNumber::kExponentBias)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3002 | movd(dst, scratch); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3003 | psllq(dst, HeapNumber::kMantissaBits); |
| 3004 | } |
| 3005 | |
| 3006 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3007 | void MacroAssembler::JumpIfInstanceTypeIsNotSequentialOneByte( |
| 3008 | Register instance_type, Register scratch, Label* failure) { |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 3009 | if (!scratch.is(instance_type)) { |
| 3010 | mov(scratch, instance_type); |
| 3011 | } |
| 3012 | and_(scratch, |
| 3013 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3014 | cmp(scratch, kStringTag | kSeqStringTag | kOneByteStringTag); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 3015 | j(not_equal, failure); |
| 3016 | } |
| 3017 | |
| 3018 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3019 | void MacroAssembler::JumpIfNotBothSequentialOneByteStrings(Register object1, |
| 3020 | Register object2, |
| 3021 | Register scratch1, |
| 3022 | Register scratch2, |
| 3023 | Label* failure) { |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3024 | // Check that both objects are not smis. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 3025 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3026 | mov(scratch1, object1); |
| 3027 | and_(scratch1, object2); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 3028 | JumpIfSmi(scratch1, failure); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3029 | |
| 3030 | // Load instance type for both strings. |
| 3031 | mov(scratch1, FieldOperand(object1, HeapObject::kMapOffset)); |
| 3032 | mov(scratch2, FieldOperand(object2, HeapObject::kMapOffset)); |
| 3033 | movzx_b(scratch1, FieldOperand(scratch1, Map::kInstanceTypeOffset)); |
| 3034 | movzx_b(scratch2, FieldOperand(scratch2, Map::kInstanceTypeOffset)); |
| 3035 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3036 | // Check that both are flat one-byte strings. |
| 3037 | const int kFlatOneByteStringMask = |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3038 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3039 | const int kFlatOneByteStringTag = |
| 3040 | kStringTag | kOneByteStringTag | kSeqStringTag; |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3041 | // Interleave bits from both instance types and compare them in one check. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3042 | DCHECK_EQ(0, kFlatOneByteStringMask & (kFlatOneByteStringMask << 3)); |
| 3043 | and_(scratch1, kFlatOneByteStringMask); |
| 3044 | and_(scratch2, kFlatOneByteStringMask); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3045 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3046 | cmp(scratch1, kFlatOneByteStringTag | (kFlatOneByteStringTag << 3)); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3047 | j(not_equal, failure); |
| 3048 | } |
| 3049 | |
| 3050 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3051 | void MacroAssembler::JumpIfNotUniqueNameInstanceType(Operand operand, |
| 3052 | Label* not_unique_name, |
| 3053 | Label::Distance distance) { |
| 3054 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| 3055 | Label succeed; |
| 3056 | test(operand, Immediate(kIsNotStringMask | kIsNotInternalizedMask)); |
| 3057 | j(zero, &succeed); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 3058 | cmpb(operand, Immediate(SYMBOL_TYPE)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3059 | j(not_equal, not_unique_name, distance); |
| 3060 | |
| 3061 | bind(&succeed); |
| 3062 | } |
| 3063 | |
| 3064 | |
| 3065 | void MacroAssembler::EmitSeqStringSetCharCheck(Register string, |
| 3066 | Register index, |
| 3067 | Register value, |
| 3068 | uint32_t encoding_mask) { |
| 3069 | Label is_object; |
| 3070 | JumpIfNotSmi(string, &is_object, Label::kNear); |
| 3071 | Abort(kNonObject); |
| 3072 | bind(&is_object); |
| 3073 | |
| 3074 | push(value); |
| 3075 | mov(value, FieldOperand(string, HeapObject::kMapOffset)); |
| 3076 | movzx_b(value, FieldOperand(value, Map::kInstanceTypeOffset)); |
| 3077 | |
| 3078 | and_(value, Immediate(kStringRepresentationMask | kStringEncodingMask)); |
| 3079 | cmp(value, Immediate(encoding_mask)); |
| 3080 | pop(value); |
| 3081 | Check(equal, kUnexpectedStringType); |
| 3082 | |
| 3083 | // The index is assumed to be untagged coming in, tag it to compare with the |
| 3084 | // string length without using a temp register, it is restored at the end of |
| 3085 | // this function. |
| 3086 | SmiTag(index); |
| 3087 | Check(no_overflow, kIndexIsTooLarge); |
| 3088 | |
| 3089 | cmp(index, FieldOperand(string, String::kLengthOffset)); |
| 3090 | Check(less, kIndexIsTooLarge); |
| 3091 | |
| 3092 | cmp(index, Immediate(Smi::FromInt(0))); |
| 3093 | Check(greater_equal, kIndexIsNegative); |
| 3094 | |
| 3095 | // Restore the index |
| 3096 | SmiUntag(index); |
| 3097 | } |
| 3098 | |
| 3099 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3100 | void MacroAssembler::PrepareCallCFunction(int num_arguments, Register scratch) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3101 | int frame_alignment = base::OS::ActivationFrameAlignment(); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 3102 | if (frame_alignment != 0) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3103 | // Make stack end at alignment and make room for num_arguments words |
| 3104 | // and the original value of esp. |
| 3105 | mov(scratch, esp); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3106 | sub(esp, Immediate((num_arguments + 1) * kPointerSize)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3107 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 3108 | and_(esp, -frame_alignment); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3109 | mov(Operand(esp, num_arguments * kPointerSize), scratch); |
| 3110 | } else { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3111 | sub(esp, Immediate(num_arguments * kPointerSize)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3112 | } |
| 3113 | } |
| 3114 | |
| 3115 | |
| 3116 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 3117 | int num_arguments) { |
| 3118 | // Trashing eax is ok as it will be the return value. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3119 | mov(eax, Immediate(function)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3120 | CallCFunction(eax, num_arguments); |
| 3121 | } |
| 3122 | |
| 3123 | |
| 3124 | void MacroAssembler::CallCFunction(Register function, |
| 3125 | int num_arguments) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3126 | DCHECK(has_frame()); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3127 | // Check stack alignment. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3128 | if (emit_debug_code()) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3129 | CheckStackAlignment(); |
| 3130 | } |
| 3131 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3132 | call(function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3133 | if (base::OS::ActivationFrameAlignment() != 0) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3134 | mov(esp, Operand(esp, num_arguments * kPointerSize)); |
| 3135 | } else { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3136 | add(esp, Immediate(num_arguments * kPointerSize)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3137 | } |
| 3138 | } |
| 3139 | |
| 3140 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3141 | #ifdef DEBUG |
| 3142 | bool AreAliased(Register reg1, |
| 3143 | Register reg2, |
| 3144 | Register reg3, |
| 3145 | Register reg4, |
| 3146 | Register reg5, |
| 3147 | Register reg6, |
| 3148 | Register reg7, |
| 3149 | Register reg8) { |
| 3150 | int n_of_valid_regs = reg1.is_valid() + reg2.is_valid() + |
| 3151 | reg3.is_valid() + reg4.is_valid() + reg5.is_valid() + reg6.is_valid() + |
| 3152 | reg7.is_valid() + reg8.is_valid(); |
| 3153 | |
| 3154 | RegList regs = 0; |
| 3155 | if (reg1.is_valid()) regs |= reg1.bit(); |
| 3156 | if (reg2.is_valid()) regs |= reg2.bit(); |
| 3157 | if (reg3.is_valid()) regs |= reg3.bit(); |
| 3158 | if (reg4.is_valid()) regs |= reg4.bit(); |
| 3159 | if (reg5.is_valid()) regs |= reg5.bit(); |
| 3160 | if (reg6.is_valid()) regs |= reg6.bit(); |
| 3161 | if (reg7.is_valid()) regs |= reg7.bit(); |
| 3162 | if (reg8.is_valid()) regs |= reg8.bit(); |
| 3163 | int n_of_non_aliasing_regs = NumRegs(regs); |
| 3164 | |
| 3165 | return n_of_valid_regs != n_of_non_aliasing_regs; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3166 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3167 | #endif |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3168 | |
| 3169 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3170 | CodePatcher::CodePatcher(Isolate* isolate, byte* address, int size) |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 3171 | : address_(address), |
| 3172 | size_(size), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3173 | masm_(isolate, address, size + Assembler::kGap, CodeObjectRequired::kNo) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3174 | // Create a new macro assembler pointing to the address of the code to patch. |
| 3175 | // The size is adjusted with kGap on order for the assembler to generate size |
| 3176 | // bytes of instructions without failing with buffer size constraints. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3177 | DCHECK(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3178 | } |
| 3179 | |
| 3180 | |
| 3181 | CodePatcher::~CodePatcher() { |
| 3182 | // Indicate that code has changed. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3183 | Assembler::FlushICache(masm_.isolate(), address_, size_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3184 | |
| 3185 | // Check that the code was patched as expected. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3186 | DCHECK(masm_.pc_ == address_ + size_); |
| 3187 | DCHECK(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3188 | } |
| 3189 | |
| 3190 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3191 | void MacroAssembler::CheckPageFlag( |
| 3192 | Register object, |
| 3193 | Register scratch, |
| 3194 | int mask, |
| 3195 | Condition cc, |
| 3196 | Label* condition_met, |
| 3197 | Label::Distance condition_met_distance) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3198 | DCHECK(cc == zero || cc == not_zero); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3199 | if (scratch.is(object)) { |
| 3200 | and_(scratch, Immediate(~Page::kPageAlignmentMask)); |
| 3201 | } else { |
| 3202 | mov(scratch, Immediate(~Page::kPageAlignmentMask)); |
| 3203 | and_(scratch, object); |
| 3204 | } |
| 3205 | if (mask < (1 << kBitsPerByte)) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 3206 | test_b(Operand(scratch, MemoryChunk::kFlagsOffset), Immediate(mask)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3207 | } else { |
| 3208 | test(Operand(scratch, MemoryChunk::kFlagsOffset), Immediate(mask)); |
| 3209 | } |
| 3210 | j(cc, condition_met, condition_met_distance); |
| 3211 | } |
| 3212 | |
| 3213 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3214 | void MacroAssembler::CheckPageFlagForMap( |
| 3215 | Handle<Map> map, |
| 3216 | int mask, |
| 3217 | Condition cc, |
| 3218 | Label* condition_met, |
| 3219 | Label::Distance condition_met_distance) { |
| 3220 | DCHECK(cc == zero || cc == not_zero); |
| 3221 | Page* page = Page::FromAddress(map->address()); |
| 3222 | DCHECK(!serializer_enabled()); // Serializer cannot match page_flags. |
| 3223 | ExternalReference reference(ExternalReference::page_flags(page)); |
| 3224 | // The inlined static address check of the page's flags relies |
| 3225 | // on maps never being compacted. |
| 3226 | DCHECK(!isolate()->heap()->mark_compact_collector()-> |
| 3227 | IsOnEvacuationCandidate(*map)); |
| 3228 | if (mask < (1 << kBitsPerByte)) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 3229 | test_b(Operand::StaticVariable(reference), Immediate(mask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3230 | } else { |
| 3231 | test(Operand::StaticVariable(reference), Immediate(mask)); |
| 3232 | } |
| 3233 | j(cc, condition_met, condition_met_distance); |
| 3234 | } |
| 3235 | |
| 3236 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3237 | void MacroAssembler::JumpIfBlack(Register object, |
| 3238 | Register scratch0, |
| 3239 | Register scratch1, |
| 3240 | Label* on_black, |
| 3241 | Label::Distance on_black_near) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3242 | HasColor(object, scratch0, scratch1, on_black, on_black_near, 1, |
| 3243 | 1); // kBlackBitPattern. |
| 3244 | DCHECK(strcmp(Marking::kBlackBitPattern, "11") == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3245 | } |
| 3246 | |
| 3247 | |
| 3248 | void MacroAssembler::HasColor(Register object, |
| 3249 | Register bitmap_scratch, |
| 3250 | Register mask_scratch, |
| 3251 | Label* has_color, |
| 3252 | Label::Distance has_color_distance, |
| 3253 | int first_bit, |
| 3254 | int second_bit) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3255 | DCHECK(!AreAliased(object, bitmap_scratch, mask_scratch, ecx)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3256 | |
| 3257 | GetMarkBits(object, bitmap_scratch, mask_scratch); |
| 3258 | |
| 3259 | Label other_color, word_boundary; |
| 3260 | test(mask_scratch, Operand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 3261 | j(first_bit == 1 ? zero : not_zero, &other_color, Label::kNear); |
| 3262 | add(mask_scratch, mask_scratch); // Shift left 1 by adding. |
| 3263 | j(zero, &word_boundary, Label::kNear); |
| 3264 | test(mask_scratch, Operand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 3265 | j(second_bit == 1 ? not_zero : zero, has_color, has_color_distance); |
| 3266 | jmp(&other_color, Label::kNear); |
| 3267 | |
| 3268 | bind(&word_boundary); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 3269 | test_b(Operand(bitmap_scratch, MemoryChunk::kHeaderSize + kPointerSize), |
| 3270 | Immediate(1)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3271 | |
| 3272 | j(second_bit == 1 ? not_zero : zero, has_color, has_color_distance); |
| 3273 | bind(&other_color); |
| 3274 | } |
| 3275 | |
| 3276 | |
| 3277 | void MacroAssembler::GetMarkBits(Register addr_reg, |
| 3278 | Register bitmap_reg, |
| 3279 | Register mask_reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3280 | DCHECK(!AreAliased(addr_reg, mask_reg, bitmap_reg, ecx)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3281 | mov(bitmap_reg, Immediate(~Page::kPageAlignmentMask)); |
| 3282 | and_(bitmap_reg, addr_reg); |
| 3283 | mov(ecx, addr_reg); |
| 3284 | int shift = |
| 3285 | Bitmap::kBitsPerCellLog2 + kPointerSizeLog2 - Bitmap::kBytesPerCellLog2; |
| 3286 | shr(ecx, shift); |
| 3287 | and_(ecx, |
| 3288 | (Page::kPageAlignmentMask >> shift) & ~(Bitmap::kBytesPerCell - 1)); |
| 3289 | |
| 3290 | add(bitmap_reg, ecx); |
| 3291 | mov(ecx, addr_reg); |
| 3292 | shr(ecx, kPointerSizeLog2); |
| 3293 | and_(ecx, (1 << Bitmap::kBitsPerCellLog2) - 1); |
| 3294 | mov(mask_reg, Immediate(1)); |
| 3295 | shl_cl(mask_reg); |
| 3296 | } |
| 3297 | |
| 3298 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3299 | void MacroAssembler::JumpIfWhite(Register value, Register bitmap_scratch, |
| 3300 | Register mask_scratch, Label* value_is_white, |
| 3301 | Label::Distance distance) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3302 | DCHECK(!AreAliased(value, bitmap_scratch, mask_scratch, ecx)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3303 | GetMarkBits(value, bitmap_scratch, mask_scratch); |
| 3304 | |
| 3305 | // 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] | 3306 | DCHECK(strcmp(Marking::kWhiteBitPattern, "00") == 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3307 | DCHECK(strcmp(Marking::kBlackBitPattern, "11") == 0); |
| 3308 | DCHECK(strcmp(Marking::kGreyBitPattern, "10") == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3309 | DCHECK(strcmp(Marking::kImpossibleBitPattern, "01") == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3310 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3311 | // Since both black and grey have a 1 in the first position and white does |
| 3312 | // not have a 1 there we only need to check one bit. |
| 3313 | test(mask_scratch, Operand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3314 | j(zero, value_is_white, Label::kNear); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3315 | } |
| 3316 | |
| 3317 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3318 | void MacroAssembler::EnumLength(Register dst, Register map) { |
| 3319 | STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); |
| 3320 | mov(dst, FieldOperand(map, Map::kBitField3Offset)); |
| 3321 | and_(dst, Immediate(Map::EnumLengthBits::kMask)); |
| 3322 | SmiTag(dst); |
| 3323 | } |
| 3324 | |
| 3325 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3326 | void MacroAssembler::CheckEnumCache(Label* call_runtime) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3327 | Label next, start; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3328 | mov(ecx, eax); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3329 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3330 | // Check if the enum length field is properly initialized, indicating that |
| 3331 | // there is an enum cache. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3332 | mov(ebx, FieldOperand(ecx, HeapObject::kMapOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3333 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3334 | EnumLength(edx, ebx); |
| 3335 | cmp(edx, Immediate(Smi::FromInt(kInvalidEnumCacheSentinel))); |
| 3336 | j(equal, call_runtime); |
| 3337 | |
| 3338 | jmp(&start); |
| 3339 | |
| 3340 | bind(&next); |
| 3341 | mov(ebx, FieldOperand(ecx, HeapObject::kMapOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3342 | |
| 3343 | // For all objects but the receiver, check that the cache is empty. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3344 | EnumLength(edx, ebx); |
| 3345 | cmp(edx, Immediate(Smi::FromInt(0))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3346 | j(not_equal, call_runtime); |
| 3347 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3348 | bind(&start); |
| 3349 | |
| 3350 | // Check that there are no elements. Register rcx contains the current JS |
| 3351 | // object we've reached through the prototype chain. |
| 3352 | Label no_elements; |
| 3353 | mov(ecx, FieldOperand(ecx, JSObject::kElementsOffset)); |
| 3354 | cmp(ecx, isolate()->factory()->empty_fixed_array()); |
| 3355 | j(equal, &no_elements); |
| 3356 | |
| 3357 | // Second chance, the object may be using the empty slow element dictionary. |
| 3358 | cmp(ecx, isolate()->factory()->empty_slow_element_dictionary()); |
| 3359 | j(not_equal, call_runtime); |
| 3360 | |
| 3361 | bind(&no_elements); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3362 | mov(ecx, FieldOperand(ebx, Map::kPrototypeOffset)); |
| 3363 | cmp(ecx, isolate()->factory()->null_value()); |
| 3364 | j(not_equal, &next); |
| 3365 | } |
| 3366 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3367 | |
| 3368 | void MacroAssembler::TestJSArrayForAllocationMemento( |
| 3369 | Register receiver_reg, |
| 3370 | Register scratch_reg, |
| 3371 | Label* no_memento_found) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 3372 | Label map_check; |
| 3373 | Label top_check; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3374 | ExternalReference new_space_allocation_top = |
| 3375 | ExternalReference::new_space_allocation_top_address(isolate()); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 3376 | const int kMementoMapOffset = JSArray::kSize - kHeapObjectTag; |
| 3377 | const int kMementoEndOffset = kMementoMapOffset + AllocationMemento::kSize; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3378 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 3379 | // Bail out if the object is not in new space. |
| 3380 | JumpIfNotInNewSpace(receiver_reg, scratch_reg, no_memento_found); |
| 3381 | // If the object is in new space, we need to check whether it is on the same |
| 3382 | // page as the current top. |
| 3383 | lea(scratch_reg, Operand(receiver_reg, kMementoEndOffset)); |
| 3384 | xor_(scratch_reg, Operand::StaticVariable(new_space_allocation_top)); |
| 3385 | test(scratch_reg, Immediate(~Page::kPageAlignmentMask)); |
| 3386 | j(zero, &top_check); |
| 3387 | // The object is on a different page than allocation top. Bail out if the |
| 3388 | // object sits on the page boundary as no memento can follow and we cannot |
| 3389 | // touch the memory following it. |
| 3390 | lea(scratch_reg, Operand(receiver_reg, kMementoEndOffset)); |
| 3391 | xor_(scratch_reg, receiver_reg); |
| 3392 | test(scratch_reg, Immediate(~Page::kPageAlignmentMask)); |
| 3393 | j(not_zero, no_memento_found); |
| 3394 | // Continue with the actual map check. |
| 3395 | jmp(&map_check); |
| 3396 | // If top is on the same page as the current object, we need to check whether |
| 3397 | // we are below top. |
| 3398 | bind(&top_check); |
| 3399 | lea(scratch_reg, Operand(receiver_reg, kMementoEndOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3400 | cmp(scratch_reg, Operand::StaticVariable(new_space_allocation_top)); |
| 3401 | j(greater, no_memento_found); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 3402 | // Memento map check. |
| 3403 | bind(&map_check); |
| 3404 | mov(scratch_reg, Operand(receiver_reg, kMementoMapOffset)); |
| 3405 | cmp(scratch_reg, Immediate(isolate()->factory()->allocation_memento_map())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3406 | } |
| 3407 | |
| 3408 | |
| 3409 | void MacroAssembler::JumpIfDictionaryInPrototypeChain( |
| 3410 | Register object, |
| 3411 | Register scratch0, |
| 3412 | Register scratch1, |
| 3413 | Label* found) { |
| 3414 | DCHECK(!scratch1.is(scratch0)); |
| 3415 | Factory* factory = isolate()->factory(); |
| 3416 | Register current = scratch0; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3417 | Label loop_again, end; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3418 | |
| 3419 | // scratch contained elements pointer. |
| 3420 | mov(current, object); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3421 | mov(current, FieldOperand(current, HeapObject::kMapOffset)); |
| 3422 | mov(current, FieldOperand(current, Map::kPrototypeOffset)); |
| 3423 | cmp(current, Immediate(factory->null_value())); |
| 3424 | j(equal, &end); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3425 | |
| 3426 | // Loop based on the map going up the prototype chain. |
| 3427 | bind(&loop_again); |
| 3428 | mov(current, FieldOperand(current, HeapObject::kMapOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3429 | STATIC_ASSERT(JS_PROXY_TYPE < JS_OBJECT_TYPE); |
| 3430 | STATIC_ASSERT(JS_VALUE_TYPE < JS_OBJECT_TYPE); |
| 3431 | CmpInstanceType(current, JS_OBJECT_TYPE); |
| 3432 | j(below, found); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3433 | mov(scratch1, FieldOperand(current, Map::kBitField2Offset)); |
| 3434 | DecodeField<Map::ElementsKindBits>(scratch1); |
| 3435 | cmp(scratch1, Immediate(DICTIONARY_ELEMENTS)); |
| 3436 | j(equal, found); |
| 3437 | mov(current, FieldOperand(current, Map::kPrototypeOffset)); |
| 3438 | cmp(current, Immediate(factory->null_value())); |
| 3439 | j(not_equal, &loop_again); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3440 | |
| 3441 | bind(&end); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3442 | } |
| 3443 | |
| 3444 | |
| 3445 | void MacroAssembler::TruncatingDiv(Register dividend, int32_t divisor) { |
| 3446 | DCHECK(!dividend.is(eax)); |
| 3447 | DCHECK(!dividend.is(edx)); |
| 3448 | base::MagicNumbersForDivision<uint32_t> mag = |
| 3449 | base::SignedDivisionByConstant(static_cast<uint32_t>(divisor)); |
| 3450 | mov(eax, Immediate(mag.multiplier)); |
| 3451 | imul(dividend); |
| 3452 | bool neg = (mag.multiplier & (static_cast<uint32_t>(1) << 31)) != 0; |
| 3453 | if (divisor > 0 && neg) add(edx, dividend); |
| 3454 | if (divisor < 0 && !neg && mag.multiplier > 0) sub(edx, dividend); |
| 3455 | if (mag.shift > 0) sar(edx, mag.shift); |
| 3456 | mov(eax, dividend); |
| 3457 | shr(eax, 31); |
| 3458 | add(edx, eax); |
| 3459 | } |
| 3460 | |
| 3461 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3462 | } // namespace internal |
| 3463 | } // namespace v8 |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 3464 | |
| 3465 | #endif // V8_TARGET_ARCH_IA32 |