Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4 | |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 5 | #include <limits.h> // For LONG_MIN, LONG_MAX. |
| 6 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 7 | #if V8_TARGET_ARCH_ARM |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 8 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 9 | #include "src/base/bits.h" |
| 10 | #include "src/base/division-by-constant.h" |
| 11 | #include "src/bootstrapper.h" |
| 12 | #include "src/codegen.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 13 | #include "src/debug/debug.h" |
| 14 | #include "src/register-configuration.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 15 | #include "src/runtime/runtime.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 16 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 17 | #include "src/arm/macro-assembler-arm.h" |
| 18 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 19 | namespace v8 { |
| 20 | namespace internal { |
| 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 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 34 | void MacroAssembler::Jump(Register target, Condition cond) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 35 | bx(target, cond); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | |
| 39 | void MacroAssembler::Jump(intptr_t target, RelocInfo::Mode rmode, |
| 40 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 41 | DCHECK(RelocInfo::IsCodeTarget(rmode)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 42 | mov(pc, Operand(target, rmode), LeaveCC, cond); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 46 | void MacroAssembler::Jump(Address target, RelocInfo::Mode rmode, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 47 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 48 | DCHECK(!RelocInfo::IsCodeTarget(rmode)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 49 | Jump(reinterpret_cast<intptr_t>(target), rmode, cond); |
| 50 | } |
| 51 | |
| 52 | |
| 53 | void MacroAssembler::Jump(Handle<Code> code, RelocInfo::Mode rmode, |
| 54 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 55 | DCHECK(RelocInfo::IsCodeTarget(rmode)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 56 | // 'code' is always generated ARM code, never THUMB code |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 57 | AllowDeferredHandleDereference embedding_raw_address; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 58 | Jump(reinterpret_cast<intptr_t>(code.location()), rmode, cond); |
| 59 | } |
| 60 | |
| 61 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 62 | int MacroAssembler::CallSize(Register target, Condition cond) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 63 | return kInstrSize; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 67 | void MacroAssembler::Call(Register target, Condition cond) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 68 | // Block constant pool for the call instruction sequence. |
| 69 | BlockConstPoolScope block_const_pool(this); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 70 | Label start; |
| 71 | bind(&start); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 72 | blx(target, cond); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 73 | DCHECK_EQ(CallSize(target, cond), SizeOfCodeGeneratedSince(&start)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 77 | int MacroAssembler::CallSize( |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 78 | Address target, RelocInfo::Mode rmode, Condition cond) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 79 | Instr mov_instr = cond | MOV | LeaveCC; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 80 | Operand mov_operand = Operand(reinterpret_cast<intptr_t>(target), rmode); |
| 81 | return kInstrSize + |
| 82 | mov_operand.instructions_required(this, mov_instr) * kInstrSize; |
| 83 | } |
| 84 | |
| 85 | |
| 86 | int MacroAssembler::CallStubSize( |
| 87 | CodeStub* stub, TypeFeedbackId ast_id, Condition cond) { |
| 88 | return CallSize(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id, cond); |
| 89 | } |
| 90 | |
| 91 | |
| 92 | int MacroAssembler::CallSizeNotPredictableCodeSize(Isolate* isolate, |
| 93 | Address target, |
| 94 | RelocInfo::Mode rmode, |
| 95 | Condition cond) { |
| 96 | Instr mov_instr = cond | MOV | LeaveCC; |
| 97 | Operand mov_operand = Operand(reinterpret_cast<intptr_t>(target), rmode); |
| 98 | return kInstrSize + |
| 99 | mov_operand.instructions_required(NULL, mov_instr) * kInstrSize; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 103 | void MacroAssembler::Call(Address target, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 104 | RelocInfo::Mode rmode, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 105 | Condition cond, |
| 106 | TargetAddressStorageMode mode) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 107 | // Block constant pool for the call instruction sequence. |
| 108 | BlockConstPoolScope block_const_pool(this); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 109 | Label start; |
| 110 | bind(&start); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 111 | |
| 112 | bool old_predictable_code_size = predictable_code_size(); |
| 113 | if (mode == NEVER_INLINE_TARGET_ADDRESS) { |
| 114 | set_predictable_code_size(true); |
| 115 | } |
| 116 | |
| 117 | #ifdef DEBUG |
| 118 | // Check the expected size before generating code to ensure we assume the same |
| 119 | // constant pool availability (e.g., whether constant pool is full or not). |
| 120 | int expected_size = CallSize(target, rmode, cond); |
| 121 | #endif |
| 122 | |
| 123 | // Call sequence on V7 or later may be : |
| 124 | // movw ip, #... @ call address low 16 |
| 125 | // movt ip, #... @ call address high 16 |
| 126 | // blx ip |
| 127 | // @ return address |
| 128 | // Or for pre-V7 or values that may be back-patched |
| 129 | // to avoid ICache flushes: |
| 130 | // ldr ip, [pc, #...] @ call address |
| 131 | // blx ip |
| 132 | // @ return address |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 133 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 134 | // Statement positions are expected to be recorded when the target |
| 135 | // address is loaded. The mov method will automatically record |
| 136 | // positions when pc is the target, since this is not the case here |
| 137 | // we have to do it explicitly. |
| 138 | positions_recorder()->WriteRecordedPositions(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 139 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 140 | mov(ip, Operand(reinterpret_cast<int32_t>(target), rmode)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 141 | blx(ip, cond); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 142 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 143 | DCHECK_EQ(expected_size, SizeOfCodeGeneratedSince(&start)); |
| 144 | if (mode == NEVER_INLINE_TARGET_ADDRESS) { |
| 145 | set_predictable_code_size(old_predictable_code_size); |
| 146 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 150 | int MacroAssembler::CallSize(Handle<Code> code, |
| 151 | RelocInfo::Mode rmode, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 152 | TypeFeedbackId ast_id, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 153 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 154 | AllowDeferredHandleDereference using_raw_address; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 155 | return CallSize(reinterpret_cast<Address>(code.location()), rmode, cond); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | |
| 159 | void MacroAssembler::Call(Handle<Code> code, |
| 160 | RelocInfo::Mode rmode, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 161 | TypeFeedbackId ast_id, |
| 162 | Condition cond, |
| 163 | TargetAddressStorageMode mode) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 164 | Label start; |
| 165 | bind(&start); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 166 | DCHECK(RelocInfo::IsCodeTarget(rmode)); |
| 167 | if (rmode == RelocInfo::CODE_TARGET && !ast_id.IsNone()) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 168 | SetRecordedAstId(ast_id); |
| 169 | rmode = RelocInfo::CODE_TARGET_WITH_ID; |
| 170 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 171 | // 'code' is always generated ARM code, never THUMB code |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 172 | AllowDeferredHandleDereference embedding_raw_address; |
| 173 | Call(reinterpret_cast<Address>(code.location()), rmode, cond, mode); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | |
| 177 | void MacroAssembler::Ret(Condition cond) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 178 | bx(lr, cond); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 182 | void MacroAssembler::Drop(int count, Condition cond) { |
| 183 | if (count > 0) { |
| 184 | add(sp, sp, Operand(count * kPointerSize), LeaveCC, cond); |
| 185 | } |
| 186 | } |
| 187 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 188 | void MacroAssembler::Drop(Register count, Condition cond) { |
| 189 | add(sp, sp, Operand(count, LSL, kPointerSizeLog2), LeaveCC, cond); |
| 190 | } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 191 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 192 | void MacroAssembler::Ret(int drop, Condition cond) { |
| 193 | Drop(drop, cond); |
| 194 | Ret(cond); |
| 195 | } |
| 196 | |
| 197 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 198 | void MacroAssembler::Swap(Register reg1, |
| 199 | Register reg2, |
| 200 | Register scratch, |
| 201 | Condition cond) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 202 | if (scratch.is(no_reg)) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 203 | eor(reg1, reg1, Operand(reg2), LeaveCC, cond); |
| 204 | eor(reg2, reg2, Operand(reg1), LeaveCC, cond); |
| 205 | eor(reg1, reg1, Operand(reg2), LeaveCC, cond); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 206 | } else { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 207 | mov(scratch, reg1, LeaveCC, cond); |
| 208 | mov(reg1, reg2, LeaveCC, cond); |
| 209 | mov(reg2, scratch, LeaveCC, cond); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 210 | } |
| 211 | } |
| 212 | |
| 213 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 214 | void MacroAssembler::Call(Label* target) { |
| 215 | bl(target); |
| 216 | } |
| 217 | |
| 218 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 219 | void MacroAssembler::Push(Handle<Object> handle) { |
| 220 | mov(ip, Operand(handle)); |
| 221 | push(ip); |
| 222 | } |
| 223 | |
| 224 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 225 | void MacroAssembler::Move(Register dst, Handle<Object> value) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 226 | AllowDeferredHandleDereference smi_check; |
| 227 | if (value->IsSmi()) { |
| 228 | mov(dst, Operand(value)); |
| 229 | } else { |
| 230 | DCHECK(value->IsHeapObject()); |
| 231 | if (isolate()->heap()->InNewSpace(*value)) { |
| 232 | Handle<Cell> cell = isolate()->factory()->NewCell(value); |
| 233 | mov(dst, Operand(cell)); |
| 234 | ldr(dst, FieldMemOperand(dst, Cell::kValueOffset)); |
| 235 | } else { |
| 236 | mov(dst, Operand(value)); |
| 237 | } |
| 238 | } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 239 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 240 | |
| 241 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 242 | void MacroAssembler::Move(Register dst, Register src, Condition cond) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 243 | if (!dst.is(src)) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 244 | mov(dst, src, LeaveCC, cond); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 245 | } |
| 246 | } |
| 247 | |
| 248 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 249 | void MacroAssembler::Move(DwVfpRegister dst, DwVfpRegister src) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 250 | if (!dst.is(src)) { |
| 251 | vmov(dst, src); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 256 | void MacroAssembler::Mls(Register dst, Register src1, Register src2, |
| 257 | Register srcA, Condition cond) { |
| 258 | if (CpuFeatures::IsSupported(MLS)) { |
| 259 | CpuFeatureScope scope(this, MLS); |
| 260 | mls(dst, src1, src2, srcA, cond); |
| 261 | } else { |
| 262 | DCHECK(!srcA.is(ip)); |
| 263 | mul(ip, src1, src2, LeaveCC, cond); |
| 264 | sub(dst, srcA, ip, LeaveCC, cond); |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 269 | void MacroAssembler::And(Register dst, Register src1, const Operand& src2, |
| 270 | Condition cond) { |
Teng-Hui Zhu | 3e5fa29 | 2010-11-09 16:16:48 -0800 | [diff] [blame] | 271 | if (!src2.is_reg() && |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 272 | !src2.must_output_reloc_info(this) && |
Teng-Hui Zhu | 3e5fa29 | 2010-11-09 16:16:48 -0800 | [diff] [blame] | 273 | src2.immediate() == 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 274 | mov(dst, Operand::Zero(), LeaveCC, cond); |
| 275 | } else if (!(src2.instructions_required(this) == 1) && |
| 276 | !src2.must_output_reloc_info(this) && |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 277 | CpuFeatures::IsSupported(ARMv7) && |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 278 | base::bits::IsPowerOfTwo32(src2.immediate() + 1)) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 279 | ubfx(dst, src1, 0, |
| 280 | WhichPowerOf2(static_cast<uint32_t>(src2.immediate()) + 1), cond); |
Teng-Hui Zhu | 3e5fa29 | 2010-11-09 16:16:48 -0800 | [diff] [blame] | 281 | } else { |
| 282 | and_(dst, src1, src2, LeaveCC, cond); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 283 | } |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | |
| 287 | void MacroAssembler::Ubfx(Register dst, Register src1, int lsb, int width, |
| 288 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 289 | DCHECK(lsb < 32); |
| 290 | if (!CpuFeatures::IsSupported(ARMv7) || predictable_code_size()) { |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 291 | int mask = (1 << (width + lsb)) - 1 - ((1 << lsb) - 1); |
| 292 | and_(dst, src1, Operand(mask), LeaveCC, cond); |
| 293 | if (lsb != 0) { |
| 294 | mov(dst, Operand(dst, LSR, lsb), LeaveCC, cond); |
| 295 | } |
| 296 | } else { |
| 297 | ubfx(dst, src1, lsb, width, cond); |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | |
| 302 | void MacroAssembler::Sbfx(Register dst, Register src1, int lsb, int width, |
| 303 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 304 | DCHECK(lsb < 32); |
| 305 | if (!CpuFeatures::IsSupported(ARMv7) || predictable_code_size()) { |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 306 | int mask = (1 << (width + lsb)) - 1 - ((1 << lsb) - 1); |
| 307 | and_(dst, src1, Operand(mask), LeaveCC, cond); |
| 308 | int shift_up = 32 - lsb - width; |
| 309 | int shift_down = lsb + shift_up; |
| 310 | if (shift_up != 0) { |
| 311 | mov(dst, Operand(dst, LSL, shift_up), LeaveCC, cond); |
| 312 | } |
| 313 | if (shift_down != 0) { |
| 314 | mov(dst, Operand(dst, ASR, shift_down), LeaveCC, cond); |
| 315 | } |
| 316 | } else { |
| 317 | sbfx(dst, src1, lsb, width, cond); |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 322 | void MacroAssembler::Bfi(Register dst, |
| 323 | Register src, |
| 324 | Register scratch, |
| 325 | int lsb, |
| 326 | int width, |
| 327 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 328 | DCHECK(0 <= lsb && lsb < 32); |
| 329 | DCHECK(0 <= width && width < 32); |
| 330 | DCHECK(lsb + width < 32); |
| 331 | DCHECK(!scratch.is(dst)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 332 | if (width == 0) return; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 333 | if (!CpuFeatures::IsSupported(ARMv7) || predictable_code_size()) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 334 | int mask = (1 << (width + lsb)) - 1 - ((1 << lsb) - 1); |
| 335 | bic(dst, dst, Operand(mask)); |
| 336 | and_(scratch, src, Operand((1 << width) - 1)); |
| 337 | mov(scratch, Operand(scratch, LSL, lsb)); |
| 338 | orr(dst, dst, scratch); |
| 339 | } else { |
| 340 | bfi(dst, src, lsb, width, cond); |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 345 | void MacroAssembler::Bfc(Register dst, Register src, int lsb, int width, |
| 346 | Condition cond) { |
| 347 | DCHECK(lsb < 32); |
| 348 | if (!CpuFeatures::IsSupported(ARMv7) || predictable_code_size()) { |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 349 | int mask = (1 << (width + lsb)) - 1 - ((1 << lsb) - 1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 350 | bic(dst, src, Operand(mask)); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 351 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 352 | Move(dst, src, cond); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 353 | bfc(dst, lsb, width, cond); |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 358 | void MacroAssembler::Usat(Register dst, int satpos, const Operand& src, |
| 359 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 360 | if (!CpuFeatures::IsSupported(ARMv7) || predictable_code_size()) { |
| 361 | DCHECK(!dst.is(pc) && !src.rm().is(pc)); |
| 362 | DCHECK((satpos >= 0) && (satpos <= 31)); |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 363 | |
| 364 | // These asserts are required to ensure compatibility with the ARMv7 |
| 365 | // implementation. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 366 | DCHECK((src.shift_op() == ASR) || (src.shift_op() == LSL)); |
| 367 | DCHECK(src.rs().is(no_reg)); |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 368 | |
| 369 | Label done; |
| 370 | int satval = (1 << satpos) - 1; |
| 371 | |
| 372 | if (cond != al) { |
| 373 | b(NegateCondition(cond), &done); // Skip saturate if !condition. |
| 374 | } |
| 375 | if (!(src.is_reg() && dst.is(src.rm()))) { |
| 376 | mov(dst, src); |
| 377 | } |
| 378 | tst(dst, Operand(~satval)); |
| 379 | b(eq, &done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 380 | mov(dst, Operand::Zero(), LeaveCC, mi); // 0 if negative. |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 381 | mov(dst, Operand(satval), LeaveCC, pl); // satval if positive. |
| 382 | bind(&done); |
| 383 | } else { |
| 384 | usat(dst, satpos, src, cond); |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 389 | void MacroAssembler::Load(Register dst, |
| 390 | const MemOperand& src, |
| 391 | Representation r) { |
| 392 | DCHECK(!r.IsDouble()); |
| 393 | if (r.IsInteger8()) { |
| 394 | ldrsb(dst, src); |
| 395 | } else if (r.IsUInteger8()) { |
| 396 | ldrb(dst, src); |
| 397 | } else if (r.IsInteger16()) { |
| 398 | ldrsh(dst, src); |
| 399 | } else if (r.IsUInteger16()) { |
| 400 | ldrh(dst, src); |
| 401 | } else { |
| 402 | ldr(dst, src); |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | |
| 407 | void MacroAssembler::Store(Register src, |
| 408 | const MemOperand& dst, |
| 409 | Representation r) { |
| 410 | DCHECK(!r.IsDouble()); |
| 411 | if (r.IsInteger8() || r.IsUInteger8()) { |
| 412 | strb(src, dst); |
| 413 | } else if (r.IsInteger16() || r.IsUInteger16()) { |
| 414 | strh(src, dst); |
| 415 | } else { |
| 416 | if (r.IsHeapObject()) { |
| 417 | AssertNotSmi(src); |
| 418 | } else if (r.IsSmi()) { |
| 419 | AssertSmi(src); |
| 420 | } |
| 421 | str(src, dst); |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 426 | void MacroAssembler::LoadRoot(Register destination, |
| 427 | Heap::RootListIndex index, |
| 428 | Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 429 | if (CpuFeatures::IsSupported(MOVW_MOVT_IMMEDIATE_LOADS) && |
| 430 | isolate()->heap()->RootCanBeTreatedAsConstant(index) && |
| 431 | !predictable_code_size()) { |
| 432 | // The CPU supports fast immediate values, and this root will never |
| 433 | // change. We will load it as a relocatable immediate value. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 434 | Handle<Object> root = isolate()->heap()->root_handle(index); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 435 | mov(destination, Operand(root), LeaveCC, cond); |
| 436 | return; |
| 437 | } |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 438 | ldr(destination, MemOperand(kRootRegister, index << kPointerSizeLog2), cond); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 439 | } |
| 440 | |
| 441 | |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 442 | void MacroAssembler::StoreRoot(Register source, |
| 443 | Heap::RootListIndex index, |
| 444 | Condition cond) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 445 | DCHECK(Heap::RootCanBeWrittenAfterInitialization(index)); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 446 | str(source, MemOperand(kRootRegister, index << kPointerSizeLog2), cond); |
| 447 | } |
| 448 | |
| 449 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 450 | void MacroAssembler::InNewSpace(Register object, |
| 451 | Register scratch, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 452 | Condition cond, |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 453 | Label* branch) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 454 | DCHECK(cond == eq || cond == ne); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 455 | const int mask = |
| 456 | (1 << MemoryChunk::IN_FROM_SPACE) | (1 << MemoryChunk::IN_TO_SPACE); |
| 457 | CheckPageFlag(object, scratch, mask, cond, branch); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 461 | void MacroAssembler::RecordWriteField( |
| 462 | Register object, |
| 463 | int offset, |
| 464 | Register value, |
| 465 | Register dst, |
| 466 | LinkRegisterStatus lr_status, |
| 467 | SaveFPRegsMode save_fp, |
| 468 | RememberedSetAction remembered_set_action, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 469 | SmiCheck smi_check, |
| 470 | PointersToHereCheck pointers_to_here_check_for_value) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 471 | // First, check if a write barrier is even needed. The tests below |
| 472 | // catch stores of Smis. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 473 | Label done; |
| 474 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 475 | // Skip barrier if writing a smi. |
| 476 | if (smi_check == INLINE_SMI_CHECK) { |
| 477 | JumpIfSmi(value, &done); |
| 478 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 479 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 480 | // Although the object register is tagged, the offset is relative to the start |
| 481 | // of the object, so so offset must be a multiple of kPointerSize. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 482 | DCHECK(IsAligned(offset, kPointerSize)); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 483 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 484 | add(dst, object, Operand(offset - kHeapObjectTag)); |
| 485 | if (emit_debug_code()) { |
| 486 | Label ok; |
| 487 | tst(dst, Operand((1 << kPointerSizeLog2) - 1)); |
| 488 | b(eq, &ok); |
| 489 | stop("Unaligned cell in write barrier"); |
| 490 | bind(&ok); |
| 491 | } |
| 492 | |
| 493 | RecordWrite(object, |
| 494 | dst, |
| 495 | value, |
| 496 | lr_status, |
| 497 | save_fp, |
| 498 | remembered_set_action, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 499 | OMIT_SMI_CHECK, |
| 500 | pointers_to_here_check_for_value); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 501 | |
| 502 | bind(&done); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 503 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 504 | // Clobber clobbered input registers when running with the debug-code flag |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 505 | // turned on to provoke errors. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 506 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 507 | mov(value, Operand(bit_cast<int32_t>(kZapValue + 4))); |
| 508 | mov(dst, Operand(bit_cast<int32_t>(kZapValue + 8))); |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | |
| 513 | // Will clobber 4 registers: object, map, dst, ip. The |
| 514 | // register 'object' contains a heap object pointer. |
| 515 | void MacroAssembler::RecordWriteForMap(Register object, |
| 516 | Register map, |
| 517 | Register dst, |
| 518 | LinkRegisterStatus lr_status, |
| 519 | SaveFPRegsMode fp_mode) { |
| 520 | if (emit_debug_code()) { |
| 521 | ldr(dst, FieldMemOperand(map, HeapObject::kMapOffset)); |
| 522 | cmp(dst, Operand(isolate()->factory()->meta_map())); |
| 523 | Check(eq, kWrongAddressOrValuePassedToRecordWrite); |
| 524 | } |
| 525 | |
| 526 | if (!FLAG_incremental_marking) { |
| 527 | return; |
| 528 | } |
| 529 | |
| 530 | if (emit_debug_code()) { |
| 531 | ldr(ip, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 532 | cmp(ip, map); |
| 533 | Check(eq, kWrongAddressOrValuePassedToRecordWrite); |
| 534 | } |
| 535 | |
| 536 | Label done; |
| 537 | |
| 538 | // A single check of the map's pages interesting flag suffices, since it is |
| 539 | // only set during incremental collection, and then it's also guaranteed that |
| 540 | // the from object's page's interesting flag is also set. This optimization |
| 541 | // relies on the fact that maps can never be in new space. |
| 542 | CheckPageFlag(map, |
| 543 | map, // Used as scratch. |
| 544 | MemoryChunk::kPointersToHereAreInterestingMask, |
| 545 | eq, |
| 546 | &done); |
| 547 | |
| 548 | add(dst, object, Operand(HeapObject::kMapOffset - kHeapObjectTag)); |
| 549 | if (emit_debug_code()) { |
| 550 | Label ok; |
| 551 | tst(dst, Operand((1 << kPointerSizeLog2) - 1)); |
| 552 | b(eq, &ok); |
| 553 | stop("Unaligned cell in write barrier"); |
| 554 | bind(&ok); |
| 555 | } |
| 556 | |
| 557 | // Record the actual write. |
| 558 | if (lr_status == kLRHasNotBeenSaved) { |
| 559 | push(lr); |
| 560 | } |
| 561 | RecordWriteStub stub(isolate(), object, map, dst, OMIT_REMEMBERED_SET, |
| 562 | fp_mode); |
| 563 | CallStub(&stub); |
| 564 | if (lr_status == kLRHasNotBeenSaved) { |
| 565 | pop(lr); |
| 566 | } |
| 567 | |
| 568 | bind(&done); |
| 569 | |
| 570 | // Count number of write barriers in generated code. |
| 571 | isolate()->counters()->write_barriers_static()->Increment(); |
| 572 | IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1, ip, dst); |
| 573 | |
| 574 | // Clobber clobbered registers when running with the debug-code flag |
| 575 | // turned on to provoke errors. |
| 576 | if (emit_debug_code()) { |
| 577 | mov(dst, Operand(bit_cast<int32_t>(kZapValue + 12))); |
| 578 | mov(map, Operand(bit_cast<int32_t>(kZapValue + 16))); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 579 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 583 | // Will clobber 4 registers: object, address, scratch, ip. The |
| 584 | // register 'object' contains a heap object pointer. The heap object |
| 585 | // tag is shifted away. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 586 | void MacroAssembler::RecordWrite( |
| 587 | Register object, |
| 588 | Register address, |
| 589 | Register value, |
| 590 | LinkRegisterStatus lr_status, |
| 591 | SaveFPRegsMode fp_mode, |
| 592 | RememberedSetAction remembered_set_action, |
| 593 | SmiCheck smi_check, |
| 594 | PointersToHereCheck pointers_to_here_check_for_value) { |
| 595 | DCHECK(!object.is(value)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 596 | if (emit_debug_code()) { |
| 597 | ldr(ip, MemOperand(address)); |
| 598 | cmp(ip, value); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 599 | Check(eq, kWrongAddressOrValuePassedToRecordWrite); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 600 | } |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 601 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 602 | if (remembered_set_action == OMIT_REMEMBERED_SET && |
| 603 | !FLAG_incremental_marking) { |
| 604 | return; |
| 605 | } |
| 606 | |
| 607 | // First, check if a write barrier is even needed. The tests below |
| 608 | // catch stores of smis and stores into the young generation. |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 609 | Label done; |
| 610 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 611 | if (smi_check == INLINE_SMI_CHECK) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 612 | JumpIfSmi(value, &done); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 613 | } |
| 614 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 615 | if (pointers_to_here_check_for_value != kPointersToHereAreAlwaysInteresting) { |
| 616 | CheckPageFlag(value, |
| 617 | value, // Used as scratch. |
| 618 | MemoryChunk::kPointersToHereAreInterestingMask, |
| 619 | eq, |
| 620 | &done); |
| 621 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 622 | CheckPageFlag(object, |
| 623 | value, // Used as scratch. |
| 624 | MemoryChunk::kPointersFromHereAreInterestingMask, |
| 625 | eq, |
| 626 | &done); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 627 | |
| 628 | // Record the actual write. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 629 | if (lr_status == kLRHasNotBeenSaved) { |
| 630 | push(lr); |
| 631 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 632 | RecordWriteStub stub(isolate(), object, value, address, remembered_set_action, |
| 633 | fp_mode); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 634 | CallStub(&stub); |
| 635 | if (lr_status == kLRHasNotBeenSaved) { |
| 636 | pop(lr); |
| 637 | } |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 638 | |
| 639 | bind(&done); |
| 640 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 641 | // Count number of write barriers in generated code. |
| 642 | isolate()->counters()->write_barriers_static()->Increment(); |
| 643 | IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1, ip, |
| 644 | value); |
| 645 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 646 | // Clobber clobbered registers when running with the debug-code flag |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 647 | // turned on to provoke errors. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 648 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 649 | mov(address, Operand(bit_cast<int32_t>(kZapValue + 12))); |
| 650 | mov(value, Operand(bit_cast<int32_t>(kZapValue + 16))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 651 | } |
| 652 | } |
| 653 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 654 | void MacroAssembler::RecordWriteCodeEntryField(Register js_function, |
| 655 | Register code_entry, |
| 656 | Register scratch) { |
| 657 | const int offset = JSFunction::kCodeEntryOffset; |
| 658 | |
| 659 | // Since a code entry (value) is always in old space, we don't need to update |
| 660 | // remembered set. If incremental marking is off, there is nothing for us to |
| 661 | // do. |
| 662 | if (!FLAG_incremental_marking) return; |
| 663 | |
| 664 | DCHECK(js_function.is(r1)); |
| 665 | DCHECK(code_entry.is(r4)); |
| 666 | DCHECK(scratch.is(r5)); |
| 667 | AssertNotSmi(js_function); |
| 668 | |
| 669 | if (emit_debug_code()) { |
| 670 | add(scratch, js_function, Operand(offset - kHeapObjectTag)); |
| 671 | ldr(ip, MemOperand(scratch)); |
| 672 | cmp(ip, code_entry); |
| 673 | Check(eq, kWrongAddressOrValuePassedToRecordWrite); |
| 674 | } |
| 675 | |
| 676 | // First, check if a write barrier is even needed. The tests below |
| 677 | // catch stores of Smis and stores into young gen. |
| 678 | Label done; |
| 679 | |
| 680 | CheckPageFlag(code_entry, scratch, |
| 681 | MemoryChunk::kPointersToHereAreInterestingMask, eq, &done); |
| 682 | CheckPageFlag(js_function, scratch, |
| 683 | MemoryChunk::kPointersFromHereAreInterestingMask, eq, &done); |
| 684 | |
| 685 | const Register dst = scratch; |
| 686 | add(dst, js_function, Operand(offset - kHeapObjectTag)); |
| 687 | |
| 688 | push(code_entry); |
| 689 | |
| 690 | // Save caller-saved registers, which includes js_function. |
| 691 | DCHECK((kCallerSaved & js_function.bit()) != 0); |
| 692 | DCHECK_EQ(kCallerSaved & code_entry.bit(), 0); |
| 693 | stm(db_w, sp, (kCallerSaved | lr.bit())); |
| 694 | |
| 695 | int argument_count = 3; |
| 696 | PrepareCallCFunction(argument_count, code_entry); |
| 697 | |
| 698 | mov(r0, js_function); |
| 699 | mov(r1, dst); |
| 700 | mov(r2, Operand(ExternalReference::isolate_address(isolate()))); |
| 701 | |
| 702 | { |
| 703 | AllowExternalCallThatCantCauseGC scope(this); |
| 704 | CallCFunction( |
| 705 | ExternalReference::incremental_marking_record_write_code_entry_function( |
| 706 | isolate()), |
| 707 | argument_count); |
| 708 | } |
| 709 | |
| 710 | // Restore caller-saved registers (including js_function and code_entry). |
| 711 | ldm(ia_w, sp, (kCallerSaved | lr.bit())); |
| 712 | |
| 713 | pop(code_entry); |
| 714 | |
| 715 | bind(&done); |
| 716 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 717 | |
| 718 | void MacroAssembler::RememberedSetHelper(Register object, // For debug tests. |
| 719 | Register address, |
| 720 | Register scratch, |
| 721 | SaveFPRegsMode fp_mode, |
| 722 | RememberedSetFinalAction and_then) { |
| 723 | Label done; |
| 724 | if (emit_debug_code()) { |
| 725 | Label ok; |
| 726 | JumpIfNotInNewSpace(object, scratch, &ok); |
| 727 | stop("Remembered set pointer is in new space"); |
| 728 | bind(&ok); |
| 729 | } |
| 730 | // Load store buffer top. |
| 731 | ExternalReference store_buffer = |
| 732 | ExternalReference::store_buffer_top(isolate()); |
| 733 | mov(ip, Operand(store_buffer)); |
| 734 | ldr(scratch, MemOperand(ip)); |
| 735 | // Store pointer to buffer and increment buffer top. |
| 736 | str(address, MemOperand(scratch, kPointerSize, PostIndex)); |
| 737 | // Write back new top of buffer. |
| 738 | str(scratch, MemOperand(ip)); |
| 739 | // Call stub on end of buffer. |
| 740 | // Check for end of buffer. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 741 | tst(scratch, Operand(StoreBuffer::kStoreBufferMask)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 742 | if (and_then == kFallThroughAtEnd) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 743 | b(ne, &done); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 744 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 745 | DCHECK(and_then == kReturnAtEnd); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 746 | Ret(ne); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 747 | } |
| 748 | push(lr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 749 | StoreBufferOverflowStub store_buffer_overflow(isolate(), fp_mode); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 750 | CallStub(&store_buffer_overflow); |
| 751 | pop(lr); |
| 752 | bind(&done); |
| 753 | if (and_then == kReturnAtEnd) { |
| 754 | Ret(); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 755 | } |
| 756 | } |
| 757 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 758 | void MacroAssembler::PushCommonFrame(Register marker_reg) { |
| 759 | if (marker_reg.is_valid()) { |
| 760 | if (FLAG_enable_embedded_constant_pool) { |
| 761 | if (marker_reg.code() > pp.code()) { |
| 762 | stm(db_w, sp, pp.bit() | fp.bit() | lr.bit()); |
| 763 | add(fp, sp, Operand(kPointerSize)); |
| 764 | Push(marker_reg); |
| 765 | } else { |
| 766 | stm(db_w, sp, marker_reg.bit() | pp.bit() | fp.bit() | lr.bit()); |
| 767 | add(fp, sp, Operand(2 * kPointerSize)); |
| 768 | } |
| 769 | } else { |
| 770 | if (marker_reg.code() > fp.code()) { |
| 771 | stm(db_w, sp, fp.bit() | lr.bit()); |
| 772 | mov(fp, Operand(sp)); |
| 773 | Push(marker_reg); |
| 774 | } else { |
| 775 | stm(db_w, sp, marker_reg.bit() | fp.bit() | lr.bit()); |
| 776 | add(fp, sp, Operand(kPointerSize)); |
| 777 | } |
| 778 | } |
| 779 | } else { |
| 780 | stm(db_w, sp, (FLAG_enable_embedded_constant_pool ? pp.bit() : 0) | |
| 781 | fp.bit() | lr.bit()); |
| 782 | add(fp, sp, Operand(FLAG_enable_embedded_constant_pool ? kPointerSize : 0)); |
| 783 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 784 | } |
| 785 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 786 | void MacroAssembler::PopCommonFrame(Register marker_reg) { |
| 787 | if (marker_reg.is_valid()) { |
| 788 | if (FLAG_enable_embedded_constant_pool) { |
| 789 | if (marker_reg.code() > pp.code()) { |
| 790 | pop(marker_reg); |
| 791 | ldm(ia_w, sp, pp.bit() | fp.bit() | lr.bit()); |
| 792 | } else { |
| 793 | ldm(ia_w, sp, marker_reg.bit() | pp.bit() | fp.bit() | lr.bit()); |
| 794 | } |
| 795 | } else { |
| 796 | if (marker_reg.code() > fp.code()) { |
| 797 | pop(marker_reg); |
| 798 | ldm(ia_w, sp, fp.bit() | lr.bit()); |
| 799 | } else { |
| 800 | ldm(ia_w, sp, marker_reg.bit() | fp.bit() | lr.bit()); |
| 801 | } |
| 802 | } |
| 803 | } else { |
| 804 | ldm(ia_w, sp, (FLAG_enable_embedded_constant_pool ? pp.bit() : 0) | |
| 805 | fp.bit() | lr.bit()); |
| 806 | } |
| 807 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 808 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 809 | void MacroAssembler::PushStandardFrame(Register function_reg) { |
| 810 | DCHECK(!function_reg.is_valid() || function_reg.code() < cp.code()); |
| 811 | stm(db_w, sp, (function_reg.is_valid() ? function_reg.bit() : 0) | cp.bit() | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 812 | (FLAG_enable_embedded_constant_pool ? pp.bit() : 0) | |
| 813 | fp.bit() | lr.bit()); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 814 | int offset = -StandardFrameConstants::kContextOffset; |
| 815 | offset += function_reg.is_valid() ? kPointerSize : 0; |
| 816 | add(fp, sp, Operand(offset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 817 | } |
| 818 | |
| 819 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 820 | // Push and pop all registers that can hold pointers. |
| 821 | void MacroAssembler::PushSafepointRegisters() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 822 | // Safepoints expect a block of contiguous register values starting with r0. |
| 823 | // except when FLAG_enable_embedded_constant_pool, which omits pp. |
| 824 | DCHECK(kSafepointSavedRegisters == |
| 825 | (FLAG_enable_embedded_constant_pool |
| 826 | ? ((1 << (kNumSafepointSavedRegisters + 1)) - 1) & ~pp.bit() |
| 827 | : (1 << kNumSafepointSavedRegisters) - 1)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 828 | // Safepoints expect a block of kNumSafepointRegisters values on the |
| 829 | // stack, so adjust the stack for unsaved registers. |
| 830 | const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 831 | DCHECK(num_unsaved >= 0); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 832 | sub(sp, sp, Operand(num_unsaved * kPointerSize)); |
| 833 | stm(db_w, sp, kSafepointSavedRegisters); |
| 834 | } |
| 835 | |
| 836 | |
| 837 | void MacroAssembler::PopSafepointRegisters() { |
| 838 | const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters; |
| 839 | ldm(ia_w, sp, kSafepointSavedRegisters); |
| 840 | add(sp, sp, Operand(num_unsaved * kPointerSize)); |
| 841 | } |
| 842 | |
| 843 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 844 | void MacroAssembler::StoreToSafepointRegisterSlot(Register src, Register dst) { |
| 845 | str(src, SafepointRegisterSlot(dst)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 846 | } |
| 847 | |
| 848 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 849 | void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) { |
| 850 | ldr(dst, SafepointRegisterSlot(src)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 851 | } |
| 852 | |
| 853 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 854 | int MacroAssembler::SafepointRegisterStackIndex(int reg_code) { |
| 855 | // The registers are pushed starting with the highest encoding, |
| 856 | // which means that lowest encodings are closest to the stack pointer. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 857 | if (FLAG_enable_embedded_constant_pool && reg_code > pp.code()) { |
| 858 | // RegList omits pp. |
| 859 | reg_code -= 1; |
| 860 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 861 | DCHECK(reg_code >= 0 && reg_code < kNumSafepointRegisters); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 862 | return reg_code; |
| 863 | } |
| 864 | |
| 865 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 866 | MemOperand MacroAssembler::SafepointRegisterSlot(Register reg) { |
| 867 | return MemOperand(sp, SafepointRegisterStackIndex(reg.code()) * kPointerSize); |
| 868 | } |
| 869 | |
| 870 | |
| 871 | MemOperand MacroAssembler::SafepointRegistersAndDoublesSlot(Register reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 872 | // Number of d-regs not known at snapshot time. |
| 873 | DCHECK(!serializer_enabled()); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 874 | // General purpose registers are pushed last on the stack. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 875 | const RegisterConfiguration* config = |
| 876 | RegisterConfiguration::ArchDefault(RegisterConfiguration::CRANKSHAFT); |
| 877 | int doubles_size = config->num_allocatable_double_registers() * kDoubleSize; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 878 | int register_offset = SafepointRegisterStackIndex(reg.code()) * kPointerSize; |
| 879 | return MemOperand(sp, doubles_size + register_offset); |
| 880 | } |
| 881 | |
| 882 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 883 | void MacroAssembler::Ldrd(Register dst1, Register dst2, |
| 884 | const MemOperand& src, Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 885 | DCHECK(src.rm().is(no_reg)); |
| 886 | DCHECK(!dst1.is(lr)); // r14. |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 887 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 888 | // V8 does not use this addressing mode, so the fallback code |
| 889 | // below doesn't support it yet. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 890 | DCHECK((src.am() != PreIndex) && (src.am() != NegPreIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 891 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 892 | // Generate two ldr instructions if ldrd is not available. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 893 | if (CpuFeatures::IsSupported(ARMv7) && !predictable_code_size() && |
| 894 | (dst1.code() % 2 == 0) && (dst1.code() + 1 == dst2.code())) { |
| 895 | CpuFeatureScope scope(this, ARMv7); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 896 | ldrd(dst1, dst2, src, cond); |
| 897 | } else { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 898 | if ((src.am() == Offset) || (src.am() == NegOffset)) { |
| 899 | MemOperand src2(src); |
| 900 | src2.set_offset(src2.offset() + 4); |
| 901 | if (dst1.is(src.rn())) { |
| 902 | ldr(dst2, src2, cond); |
| 903 | ldr(dst1, src, cond); |
| 904 | } else { |
| 905 | ldr(dst1, src, cond); |
| 906 | ldr(dst2, src2, cond); |
| 907 | } |
| 908 | } else { // PostIndex or NegPostIndex. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 909 | DCHECK((src.am() == PostIndex) || (src.am() == NegPostIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 910 | if (dst1.is(src.rn())) { |
| 911 | ldr(dst2, MemOperand(src.rn(), 4, Offset), cond); |
| 912 | ldr(dst1, src, cond); |
| 913 | } else { |
| 914 | MemOperand src2(src); |
| 915 | src2.set_offset(src2.offset() - 4); |
| 916 | ldr(dst1, MemOperand(src.rn(), 4, PostIndex), cond); |
| 917 | ldr(dst2, src2, cond); |
| 918 | } |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 919 | } |
| 920 | } |
| 921 | } |
| 922 | |
| 923 | |
| 924 | void MacroAssembler::Strd(Register src1, Register src2, |
| 925 | const MemOperand& dst, Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 926 | DCHECK(dst.rm().is(no_reg)); |
| 927 | DCHECK(!src1.is(lr)); // r14. |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 928 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 929 | // V8 does not use this addressing mode, so the fallback code |
| 930 | // below doesn't support it yet. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 931 | DCHECK((dst.am() != PreIndex) && (dst.am() != NegPreIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 932 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 933 | // Generate two str instructions if strd is not available. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 934 | if (CpuFeatures::IsSupported(ARMv7) && !predictable_code_size() && |
| 935 | (src1.code() % 2 == 0) && (src1.code() + 1 == src2.code())) { |
| 936 | CpuFeatureScope scope(this, ARMv7); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 937 | strd(src1, src2, dst, cond); |
| 938 | } else { |
| 939 | MemOperand dst2(dst); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 940 | if ((dst.am() == Offset) || (dst.am() == NegOffset)) { |
| 941 | dst2.set_offset(dst2.offset() + 4); |
| 942 | str(src1, dst, cond); |
| 943 | str(src2, dst2, cond); |
| 944 | } else { // PostIndex or NegPostIndex. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 945 | DCHECK((dst.am() == PostIndex) || (dst.am() == NegPostIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 946 | dst2.set_offset(dst2.offset() - 4); |
| 947 | str(src1, MemOperand(dst.rn(), 4, PostIndex), cond); |
| 948 | str(src2, dst2, cond); |
| 949 | } |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 950 | } |
| 951 | } |
| 952 | |
| 953 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 954 | void MacroAssembler::VFPEnsureFPSCRState(Register scratch) { |
| 955 | // If needed, restore wanted bits of FPSCR. |
| 956 | Label fpscr_done; |
| 957 | vmrs(scratch); |
| 958 | if (emit_debug_code()) { |
| 959 | Label rounding_mode_correct; |
| 960 | tst(scratch, Operand(kVFPRoundingModeMask)); |
| 961 | b(eq, &rounding_mode_correct); |
| 962 | // Don't call Assert here, since Runtime_Abort could re-enter here. |
| 963 | stop("Default rounding mode not set"); |
| 964 | bind(&rounding_mode_correct); |
| 965 | } |
| 966 | tst(scratch, Operand(kVFPDefaultNaNModeControlBit)); |
| 967 | b(ne, &fpscr_done); |
| 968 | orr(scratch, scratch, Operand(kVFPDefaultNaNModeControlBit)); |
| 969 | vmsr(scratch); |
| 970 | bind(&fpscr_done); |
| 971 | } |
| 972 | |
| 973 | |
| 974 | void MacroAssembler::VFPCanonicalizeNaN(const DwVfpRegister dst, |
| 975 | const DwVfpRegister src, |
| 976 | const Condition cond) { |
| 977 | vsub(dst, src, kDoubleRegZero, cond); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 978 | } |
| 979 | |
| 980 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 981 | void MacroAssembler::VFPCompareAndSetFlags(const SwVfpRegister src1, |
| 982 | const SwVfpRegister src2, |
| 983 | const Condition cond) { |
| 984 | // Compare and move FPSCR flags to the normal condition flags. |
| 985 | VFPCompareAndLoadFlags(src1, src2, pc, cond); |
| 986 | } |
| 987 | |
| 988 | void MacroAssembler::VFPCompareAndSetFlags(const SwVfpRegister src1, |
| 989 | const float src2, |
| 990 | const Condition cond) { |
| 991 | // Compare and move FPSCR flags to the normal condition flags. |
| 992 | VFPCompareAndLoadFlags(src1, src2, pc, cond); |
| 993 | } |
| 994 | |
| 995 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 996 | void MacroAssembler::VFPCompareAndSetFlags(const DwVfpRegister src1, |
| 997 | const DwVfpRegister src2, |
| 998 | const Condition cond) { |
| 999 | // Compare and move FPSCR flags to the normal condition flags. |
| 1000 | VFPCompareAndLoadFlags(src1, src2, pc, cond); |
| 1001 | } |
| 1002 | |
| 1003 | void MacroAssembler::VFPCompareAndSetFlags(const DwVfpRegister src1, |
| 1004 | const double src2, |
| 1005 | const Condition cond) { |
| 1006 | // Compare and move FPSCR flags to the normal condition flags. |
| 1007 | VFPCompareAndLoadFlags(src1, src2, pc, cond); |
| 1008 | } |
| 1009 | |
| 1010 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1011 | void MacroAssembler::VFPCompareAndLoadFlags(const SwVfpRegister src1, |
| 1012 | const SwVfpRegister src2, |
| 1013 | const Register fpscr_flags, |
| 1014 | const Condition cond) { |
| 1015 | // Compare and load FPSCR. |
| 1016 | vcmp(src1, src2, cond); |
| 1017 | vmrs(fpscr_flags, cond); |
| 1018 | } |
| 1019 | |
| 1020 | void MacroAssembler::VFPCompareAndLoadFlags(const SwVfpRegister src1, |
| 1021 | const float src2, |
| 1022 | const Register fpscr_flags, |
| 1023 | const Condition cond) { |
| 1024 | // Compare and load FPSCR. |
| 1025 | vcmp(src1, src2, cond); |
| 1026 | vmrs(fpscr_flags, cond); |
| 1027 | } |
| 1028 | |
| 1029 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1030 | void MacroAssembler::VFPCompareAndLoadFlags(const DwVfpRegister src1, |
| 1031 | const DwVfpRegister src2, |
| 1032 | const Register fpscr_flags, |
| 1033 | const Condition cond) { |
| 1034 | // Compare and load FPSCR. |
| 1035 | vcmp(src1, src2, cond); |
| 1036 | vmrs(fpscr_flags, cond); |
| 1037 | } |
| 1038 | |
| 1039 | void MacroAssembler::VFPCompareAndLoadFlags(const DwVfpRegister src1, |
| 1040 | const double src2, |
| 1041 | const Register fpscr_flags, |
| 1042 | const Condition cond) { |
| 1043 | // Compare and load FPSCR. |
| 1044 | vcmp(src1, src2, cond); |
| 1045 | vmrs(fpscr_flags, cond); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 1046 | } |
| 1047 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1048 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1049 | void MacroAssembler::Vmov(const DwVfpRegister dst, |
| 1050 | const double imm, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1051 | const Register scratch) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1052 | static const DoubleRepresentation minus_zero(-0.0); |
| 1053 | static const DoubleRepresentation zero(0.0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1054 | DoubleRepresentation value_rep(imm); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1055 | // Handle special values first. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1056 | if (value_rep == zero) { |
| 1057 | vmov(dst, kDoubleRegZero); |
| 1058 | } else if (value_rep == minus_zero) { |
| 1059 | vneg(dst, kDoubleRegZero); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1060 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1061 | vmov(dst, imm, scratch); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1062 | } |
| 1063 | } |
| 1064 | |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 1065 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1066 | void MacroAssembler::VmovHigh(Register dst, DwVfpRegister src) { |
| 1067 | if (src.code() < 16) { |
| 1068 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(src.code()); |
| 1069 | vmov(dst, loc.high()); |
| 1070 | } else { |
| 1071 | vmov(dst, VmovIndexHi, src); |
| 1072 | } |
| 1073 | } |
| 1074 | |
| 1075 | |
| 1076 | void MacroAssembler::VmovHigh(DwVfpRegister dst, Register src) { |
| 1077 | if (dst.code() < 16) { |
| 1078 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(dst.code()); |
| 1079 | vmov(loc.high(), src); |
| 1080 | } else { |
| 1081 | vmov(dst, VmovIndexHi, src); |
| 1082 | } |
| 1083 | } |
| 1084 | |
| 1085 | |
| 1086 | void MacroAssembler::VmovLow(Register dst, DwVfpRegister src) { |
| 1087 | if (src.code() < 16) { |
| 1088 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(src.code()); |
| 1089 | vmov(dst, loc.low()); |
| 1090 | } else { |
| 1091 | vmov(dst, VmovIndexLo, src); |
| 1092 | } |
| 1093 | } |
| 1094 | |
| 1095 | |
| 1096 | void MacroAssembler::VmovLow(DwVfpRegister dst, Register src) { |
| 1097 | if (dst.code() < 16) { |
| 1098 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(dst.code()); |
| 1099 | vmov(loc.low(), src); |
| 1100 | } else { |
| 1101 | vmov(dst, VmovIndexLo, src); |
| 1102 | } |
| 1103 | } |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1104 | void MacroAssembler::LslPair(Register dst_low, Register dst_high, |
| 1105 | Register src_low, Register src_high, |
| 1106 | Register scratch, Register shift) { |
| 1107 | DCHECK(!AreAliased(dst_high, src_low)); |
| 1108 | DCHECK(!AreAliased(dst_high, shift)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1109 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1110 | Label less_than_32; |
| 1111 | Label done; |
| 1112 | rsb(scratch, shift, Operand(32), SetCC); |
| 1113 | b(gt, &less_than_32); |
| 1114 | // If shift >= 32 |
| 1115 | and_(scratch, shift, Operand(0x1f)); |
| 1116 | lsl(dst_high, src_low, Operand(scratch)); |
| 1117 | mov(dst_low, Operand(0)); |
| 1118 | jmp(&done); |
| 1119 | bind(&less_than_32); |
| 1120 | // If shift < 32 |
| 1121 | lsl(dst_high, src_high, Operand(shift)); |
| 1122 | orr(dst_high, dst_high, Operand(src_low, LSR, scratch)); |
| 1123 | lsl(dst_low, src_low, Operand(shift)); |
| 1124 | bind(&done); |
| 1125 | } |
| 1126 | |
| 1127 | void MacroAssembler::LslPair(Register dst_low, Register dst_high, |
| 1128 | Register src_low, Register src_high, |
| 1129 | uint32_t shift) { |
| 1130 | DCHECK(!AreAliased(dst_high, src_low)); |
| 1131 | Label less_than_32; |
| 1132 | Label done; |
| 1133 | if (shift == 0) { |
| 1134 | Move(dst_high, src_high); |
| 1135 | Move(dst_low, src_low); |
| 1136 | } else if (shift == 32) { |
| 1137 | Move(dst_high, src_low); |
| 1138 | Move(dst_low, Operand(0)); |
| 1139 | } else if (shift >= 32) { |
| 1140 | shift &= 0x1f; |
| 1141 | lsl(dst_high, src_low, Operand(shift)); |
| 1142 | mov(dst_low, Operand(0)); |
| 1143 | } else { |
| 1144 | lsl(dst_high, src_high, Operand(shift)); |
| 1145 | orr(dst_high, dst_high, Operand(src_low, LSR, 32 - shift)); |
| 1146 | lsl(dst_low, src_low, Operand(shift)); |
| 1147 | } |
| 1148 | } |
| 1149 | |
| 1150 | void MacroAssembler::LsrPair(Register dst_low, Register dst_high, |
| 1151 | Register src_low, Register src_high, |
| 1152 | Register scratch, Register shift) { |
| 1153 | DCHECK(!AreAliased(dst_low, src_high)); |
| 1154 | DCHECK(!AreAliased(dst_low, shift)); |
| 1155 | |
| 1156 | Label less_than_32; |
| 1157 | Label done; |
| 1158 | rsb(scratch, shift, Operand(32), SetCC); |
| 1159 | b(gt, &less_than_32); |
| 1160 | // If shift >= 32 |
| 1161 | and_(scratch, shift, Operand(0x1f)); |
| 1162 | lsr(dst_low, src_high, Operand(scratch)); |
| 1163 | mov(dst_high, Operand(0)); |
| 1164 | jmp(&done); |
| 1165 | bind(&less_than_32); |
| 1166 | // If shift < 32 |
| 1167 | |
| 1168 | lsr(dst_low, src_low, Operand(shift)); |
| 1169 | orr(dst_low, dst_low, Operand(src_high, LSL, scratch)); |
| 1170 | lsr(dst_high, src_high, Operand(shift)); |
| 1171 | bind(&done); |
| 1172 | } |
| 1173 | |
| 1174 | void MacroAssembler::LsrPair(Register dst_low, Register dst_high, |
| 1175 | Register src_low, Register src_high, |
| 1176 | uint32_t shift) { |
| 1177 | DCHECK(!AreAliased(dst_low, src_high)); |
| 1178 | Label less_than_32; |
| 1179 | Label done; |
| 1180 | if (shift == 32) { |
| 1181 | mov(dst_low, src_high); |
| 1182 | mov(dst_high, Operand(0)); |
| 1183 | } else if (shift > 32) { |
| 1184 | shift &= 0x1f; |
| 1185 | lsr(dst_low, src_high, Operand(shift)); |
| 1186 | mov(dst_high, Operand(0)); |
| 1187 | } else if (shift == 0) { |
| 1188 | Move(dst_low, src_low); |
| 1189 | Move(dst_high, src_high); |
| 1190 | } else { |
| 1191 | lsr(dst_low, src_low, Operand(shift)); |
| 1192 | orr(dst_low, dst_low, Operand(src_high, LSL, 32 - shift)); |
| 1193 | lsr(dst_high, src_high, Operand(shift)); |
| 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | void MacroAssembler::AsrPair(Register dst_low, Register dst_high, |
| 1198 | Register src_low, Register src_high, |
| 1199 | Register scratch, Register shift) { |
| 1200 | DCHECK(!AreAliased(dst_low, src_high)); |
| 1201 | DCHECK(!AreAliased(dst_low, shift)); |
| 1202 | |
| 1203 | Label less_than_32; |
| 1204 | Label done; |
| 1205 | rsb(scratch, shift, Operand(32), SetCC); |
| 1206 | b(gt, &less_than_32); |
| 1207 | // If shift >= 32 |
| 1208 | and_(scratch, shift, Operand(0x1f)); |
| 1209 | asr(dst_low, src_high, Operand(scratch)); |
| 1210 | asr(dst_high, src_high, Operand(31)); |
| 1211 | jmp(&done); |
| 1212 | bind(&less_than_32); |
| 1213 | // If shift < 32 |
| 1214 | lsr(dst_low, src_low, Operand(shift)); |
| 1215 | orr(dst_low, dst_low, Operand(src_high, LSL, scratch)); |
| 1216 | asr(dst_high, src_high, Operand(shift)); |
| 1217 | bind(&done); |
| 1218 | } |
| 1219 | |
| 1220 | void MacroAssembler::AsrPair(Register dst_low, Register dst_high, |
| 1221 | Register src_low, Register src_high, |
| 1222 | uint32_t shift) { |
| 1223 | DCHECK(!AreAliased(dst_low, src_high)); |
| 1224 | Label less_than_32; |
| 1225 | Label done; |
| 1226 | if (shift == 32) { |
| 1227 | mov(dst_low, src_high); |
| 1228 | asr(dst_high, src_high, Operand(31)); |
| 1229 | } else if (shift > 32) { |
| 1230 | shift &= 0x1f; |
| 1231 | asr(dst_low, src_high, Operand(shift)); |
| 1232 | asr(dst_high, src_high, Operand(31)); |
| 1233 | } else if (shift == 0) { |
| 1234 | Move(dst_low, src_low); |
| 1235 | Move(dst_high, src_high); |
| 1236 | } else { |
| 1237 | lsr(dst_low, src_low, Operand(shift)); |
| 1238 | orr(dst_low, dst_low, Operand(src_high, LSL, 32 - shift)); |
| 1239 | asr(dst_high, src_high, Operand(shift)); |
| 1240 | } |
| 1241 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1242 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1243 | void MacroAssembler::LoadConstantPoolPointerRegisterFromCodeTargetAddress( |
| 1244 | Register code_target_address) { |
| 1245 | DCHECK(FLAG_enable_embedded_constant_pool); |
| 1246 | ldr(pp, MemOperand(code_target_address, |
| 1247 | Code::kConstantPoolOffset - Code::kHeaderSize)); |
| 1248 | add(pp, pp, code_target_address); |
| 1249 | } |
| 1250 | |
| 1251 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1252 | void MacroAssembler::LoadConstantPoolPointerRegister() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1253 | DCHECK(FLAG_enable_embedded_constant_pool); |
| 1254 | int entry_offset = pc_offset() + Instruction::kPCReadOffset; |
| 1255 | sub(ip, pc, Operand(entry_offset)); |
| 1256 | LoadConstantPoolPointerRegisterFromCodeTargetAddress(ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1257 | } |
| 1258 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1259 | void MacroAssembler::StubPrologue(StackFrame::Type type) { |
| 1260 | mov(ip, Operand(Smi::FromInt(type))); |
| 1261 | PushCommonFrame(ip); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1262 | if (FLAG_enable_embedded_constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1263 | LoadConstantPoolPointerRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1264 | set_constant_pool_available(true); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1265 | } |
| 1266 | } |
| 1267 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1268 | void MacroAssembler::Prologue(bool code_pre_aging) { |
| 1269 | { PredictableCodeSizeScope predictible_code_size_scope( |
| 1270 | this, kNoCodeAgeSequenceLength); |
| 1271 | // The following three instructions must remain together and unmodified |
| 1272 | // for code aging to work properly. |
| 1273 | if (code_pre_aging) { |
| 1274 | // Pre-age the code. |
| 1275 | Code* stub = Code::GetPreAgedCodeAgeStub(isolate()); |
| 1276 | add(r0, pc, Operand(-8)); |
| 1277 | ldr(pc, MemOperand(pc, -4)); |
| 1278 | emit_code_stub_address(stub); |
| 1279 | } else { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1280 | PushStandardFrame(r1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1281 | nop(ip.code()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1282 | } |
| 1283 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1284 | if (FLAG_enable_embedded_constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1285 | LoadConstantPoolPointerRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1286 | set_constant_pool_available(true); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1287 | } |
| 1288 | } |
| 1289 | |
| 1290 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1291 | void MacroAssembler::EmitLoadTypeFeedbackVector(Register vector) { |
| 1292 | ldr(vector, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| 1293 | ldr(vector, FieldMemOperand(vector, JSFunction::kSharedFunctionInfoOffset)); |
| 1294 | ldr(vector, |
| 1295 | FieldMemOperand(vector, SharedFunctionInfo::kFeedbackVectorOffset)); |
| 1296 | } |
| 1297 | |
| 1298 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1299 | void MacroAssembler::EnterFrame(StackFrame::Type type, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1300 | bool load_constant_pool_pointer_reg) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1301 | // r0-r3: preserved |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1302 | mov(ip, Operand(Smi::FromInt(type))); |
| 1303 | PushCommonFrame(ip); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1304 | if (FLAG_enable_embedded_constant_pool && load_constant_pool_pointer_reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1305 | LoadConstantPoolPointerRegister(); |
| 1306 | } |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1307 | if (type == StackFrame::INTERNAL) { |
| 1308 | mov(ip, Operand(CodeObject())); |
| 1309 | push(ip); |
| 1310 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1311 | } |
| 1312 | |
| 1313 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1314 | int MacroAssembler::LeaveFrame(StackFrame::Type type) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1315 | // r0: preserved |
| 1316 | // r1: preserved |
| 1317 | // r2: preserved |
| 1318 | |
| 1319 | // Drop the execution stack down to the frame pointer and restore |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1320 | // the caller frame pointer, return address and constant pool pointer |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1321 | // (if FLAG_enable_embedded_constant_pool). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1322 | int frame_ends; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1323 | if (FLAG_enable_embedded_constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1324 | add(sp, fp, Operand(StandardFrameConstants::kConstantPoolOffset)); |
| 1325 | frame_ends = pc_offset(); |
| 1326 | ldm(ia_w, sp, pp.bit() | fp.bit() | lr.bit()); |
| 1327 | } else { |
| 1328 | mov(sp, fp); |
| 1329 | frame_ends = pc_offset(); |
| 1330 | ldm(ia_w, sp, fp.bit() | lr.bit()); |
| 1331 | } |
| 1332 | return frame_ends; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1333 | } |
| 1334 | |
| 1335 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1336 | void MacroAssembler::EnterExitFrame(bool save_doubles, int stack_space) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1337 | // Set up the frame structure on the stack. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1338 | DCHECK_EQ(2 * kPointerSize, ExitFrameConstants::kCallerSPDisplacement); |
| 1339 | DCHECK_EQ(1 * kPointerSize, ExitFrameConstants::kCallerPCOffset); |
| 1340 | DCHECK_EQ(0 * kPointerSize, ExitFrameConstants::kCallerFPOffset); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1341 | mov(ip, Operand(Smi::FromInt(StackFrame::EXIT))); |
| 1342 | PushCommonFrame(ip); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1343 | // Reserve room for saved entry sp and code object. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1344 | sub(sp, fp, Operand(ExitFrameConstants::kFixedFrameSizeFromFp)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1345 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1346 | mov(ip, Operand::Zero()); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1347 | str(ip, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
| 1348 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1349 | if (FLAG_enable_embedded_constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1350 | str(pp, MemOperand(fp, ExitFrameConstants::kConstantPoolOffset)); |
| 1351 | } |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1352 | mov(ip, Operand(CodeObject())); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1353 | str(ip, MemOperand(fp, ExitFrameConstants::kCodeOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1354 | |
| 1355 | // Save the frame pointer and the context in top. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1356 | mov(ip, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1357 | str(fp, MemOperand(ip)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1358 | mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1359 | str(cp, MemOperand(ip)); |
| 1360 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1361 | // Optionally save all double registers. |
| 1362 | if (save_doubles) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1363 | SaveFPRegs(sp, ip); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1364 | // Note that d0 will be accessible at |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1365 | // fp - ExitFrameConstants::kFrameSize - |
| 1366 | // DwVfpRegister::kMaxNumRegisters * kDoubleSize, |
| 1367 | // since the sp slot, code slot and constant pool slot (if |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1368 | // FLAG_enable_embedded_constant_pool) were pushed after the fp. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1369 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1370 | |
| 1371 | // Reserve place for the return address and stack space and align the frame |
| 1372 | // preparing for calling the runtime function. |
| 1373 | const int frame_alignment = MacroAssembler::ActivationFrameAlignment(); |
| 1374 | sub(sp, sp, Operand((stack_space + 1) * kPointerSize)); |
| 1375 | if (frame_alignment > 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1376 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1377 | and_(sp, sp, Operand(-frame_alignment)); |
| 1378 | } |
| 1379 | |
| 1380 | // Set the exit frame sp value to point just before the return address |
| 1381 | // location. |
| 1382 | add(ip, sp, Operand(kPointerSize)); |
| 1383 | str(ip, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1384 | } |
| 1385 | |
| 1386 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1387 | void MacroAssembler::InitializeNewString(Register string, |
| 1388 | Register length, |
| 1389 | Heap::RootListIndex map_index, |
| 1390 | Register scratch1, |
| 1391 | Register scratch2) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1392 | SmiTag(scratch1, length); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1393 | LoadRoot(scratch2, map_index); |
| 1394 | str(scratch1, FieldMemOperand(string, String::kLengthOffset)); |
| 1395 | mov(scratch1, Operand(String::kEmptyHashField)); |
| 1396 | str(scratch2, FieldMemOperand(string, HeapObject::kMapOffset)); |
| 1397 | str(scratch1, FieldMemOperand(string, String::kHashFieldOffset)); |
| 1398 | } |
| 1399 | |
| 1400 | |
| 1401 | int MacroAssembler::ActivationFrameAlignment() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1402 | #if V8_HOST_ARCH_ARM |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1403 | // Running on the real platform. Use the alignment as mandated by the local |
| 1404 | // environment. |
| 1405 | // Note: This will break if we ever start generating snapshots on one ARM |
| 1406 | // platform for another ARM platform with a different alignment. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1407 | return base::OS::ActivationFrameAlignment(); |
| 1408 | #else // V8_HOST_ARCH_ARM |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1409 | // If we are using the simulator then we should always align to the expected |
| 1410 | // alignment. As the simulator is used to generate snapshots we do not know |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1411 | // if the target platform will need alignment, so this is controlled from a |
| 1412 | // flag. |
| 1413 | return FLAG_sim_stack_alignment; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1414 | #endif // V8_HOST_ARCH_ARM |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1415 | } |
| 1416 | |
| 1417 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1418 | void MacroAssembler::LeaveExitFrame(bool save_doubles, Register argument_count, |
| 1419 | bool restore_context, |
| 1420 | bool argument_count_is_length) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1421 | ConstantPoolUnavailableScope constant_pool_unavailable(this); |
| 1422 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1423 | // Optionally restore all double registers. |
| 1424 | if (save_doubles) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1425 | // Calculate the stack location of the saved doubles and restore them. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1426 | const int offset = ExitFrameConstants::kFixedFrameSizeFromFp; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1427 | sub(r3, fp, |
| 1428 | Operand(offset + DwVfpRegister::kMaxNumRegisters * kDoubleSize)); |
| 1429 | RestoreFPRegs(r3, ip); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1430 | } |
| 1431 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1432 | // Clear top frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1433 | mov(r3, Operand::Zero()); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1434 | mov(ip, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1435 | str(r3, MemOperand(ip)); |
| 1436 | |
| 1437 | // Restore current context from top and clear it in debug mode. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1438 | if (restore_context) { |
| 1439 | mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
| 1440 | ldr(cp, MemOperand(ip)); |
| 1441 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1442 | #ifdef DEBUG |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1443 | mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1444 | str(r3, MemOperand(ip)); |
| 1445 | #endif |
| 1446 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1447 | // Tear down the exit frame, pop the arguments, and return. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1448 | if (FLAG_enable_embedded_constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1449 | ldr(pp, MemOperand(fp, ExitFrameConstants::kConstantPoolOffset)); |
| 1450 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1451 | mov(sp, Operand(fp)); |
| 1452 | ldm(ia_w, sp, fp.bit() | lr.bit()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1453 | if (argument_count.is_valid()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1454 | if (argument_count_is_length) { |
| 1455 | add(sp, sp, argument_count); |
| 1456 | } else { |
| 1457 | add(sp, sp, Operand(argument_count, LSL, kPointerSizeLog2)); |
| 1458 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1459 | } |
| 1460 | } |
| 1461 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1462 | |
| 1463 | void MacroAssembler::MovFromFloatResult(const DwVfpRegister dst) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1464 | if (use_eabi_hardfloat()) { |
| 1465 | Move(dst, d0); |
| 1466 | } else { |
| 1467 | vmov(dst, r0, r1); |
| 1468 | } |
| 1469 | } |
| 1470 | |
| 1471 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1472 | // On ARM this is just a synonym to make the purpose clear. |
| 1473 | void MacroAssembler::MovFromFloatParameter(DwVfpRegister dst) { |
| 1474 | MovFromFloatResult(dst); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1475 | } |
| 1476 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1477 | void MacroAssembler::PrepareForTailCall(const ParameterCount& callee_args_count, |
| 1478 | Register caller_args_count_reg, |
| 1479 | Register scratch0, Register scratch1) { |
| 1480 | #if DEBUG |
| 1481 | if (callee_args_count.is_reg()) { |
| 1482 | DCHECK(!AreAliased(callee_args_count.reg(), caller_args_count_reg, scratch0, |
| 1483 | scratch1)); |
| 1484 | } else { |
| 1485 | DCHECK(!AreAliased(caller_args_count_reg, scratch0, scratch1)); |
| 1486 | } |
| 1487 | #endif |
| 1488 | |
| 1489 | // Calculate the end of destination area where we will put the arguments |
| 1490 | // after we drop current frame. We add kPointerSize to count the receiver |
| 1491 | // argument which is not included into formal parameters count. |
| 1492 | Register dst_reg = scratch0; |
| 1493 | add(dst_reg, fp, Operand(caller_args_count_reg, LSL, kPointerSizeLog2)); |
| 1494 | add(dst_reg, dst_reg, |
| 1495 | Operand(StandardFrameConstants::kCallerSPOffset + kPointerSize)); |
| 1496 | |
| 1497 | Register src_reg = caller_args_count_reg; |
| 1498 | // Calculate the end of source area. +kPointerSize is for the receiver. |
| 1499 | if (callee_args_count.is_reg()) { |
| 1500 | add(src_reg, sp, Operand(callee_args_count.reg(), LSL, kPointerSizeLog2)); |
| 1501 | add(src_reg, src_reg, Operand(kPointerSize)); |
| 1502 | } else { |
| 1503 | add(src_reg, sp, |
| 1504 | Operand((callee_args_count.immediate() + 1) * kPointerSize)); |
| 1505 | } |
| 1506 | |
| 1507 | if (FLAG_debug_code) { |
| 1508 | cmp(src_reg, dst_reg); |
| 1509 | Check(lo, kStackAccessBelowStackPointer); |
| 1510 | } |
| 1511 | |
| 1512 | // Restore caller's frame pointer and return address now as they will be |
| 1513 | // overwritten by the copying loop. |
| 1514 | ldr(lr, MemOperand(fp, StandardFrameConstants::kCallerPCOffset)); |
| 1515 | ldr(fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 1516 | |
| 1517 | // Now copy callee arguments to the caller frame going backwards to avoid |
| 1518 | // callee arguments corruption (source and destination areas could overlap). |
| 1519 | |
| 1520 | // Both src_reg and dst_reg are pointing to the word after the one to copy, |
| 1521 | // so they must be pre-decremented in the loop. |
| 1522 | Register tmp_reg = scratch1; |
| 1523 | Label loop, entry; |
| 1524 | b(&entry); |
| 1525 | bind(&loop); |
| 1526 | ldr(tmp_reg, MemOperand(src_reg, -kPointerSize, PreIndex)); |
| 1527 | str(tmp_reg, MemOperand(dst_reg, -kPointerSize, PreIndex)); |
| 1528 | bind(&entry); |
| 1529 | cmp(sp, src_reg); |
| 1530 | b(ne, &loop); |
| 1531 | |
| 1532 | // Leave current frame. |
| 1533 | mov(sp, dst_reg); |
| 1534 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1535 | |
| 1536 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 1537 | const ParameterCount& actual, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1538 | Label* done, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1539 | bool* definitely_mismatches, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1540 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1541 | const CallWrapper& call_wrapper) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1542 | bool definitely_matches = false; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1543 | *definitely_mismatches = false; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1544 | Label regular_invoke; |
| 1545 | |
| 1546 | // Check whether the expected and actual arguments count match. If not, |
| 1547 | // setup registers according to contract with ArgumentsAdaptorTrampoline: |
| 1548 | // r0: actual arguments count |
| 1549 | // r1: function (passed through to callee) |
| 1550 | // r2: expected arguments count |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1551 | |
| 1552 | // The code below is made a lot easier because the calling code already sets |
| 1553 | // up actual and expected registers according to the contract if values are |
| 1554 | // passed in registers. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1555 | DCHECK(actual.is_immediate() || actual.reg().is(r0)); |
| 1556 | DCHECK(expected.is_immediate() || expected.reg().is(r2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1557 | |
| 1558 | if (expected.is_immediate()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1559 | DCHECK(actual.is_immediate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1560 | mov(r0, Operand(actual.immediate())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1561 | if (expected.immediate() == actual.immediate()) { |
| 1562 | definitely_matches = true; |
| 1563 | } else { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1564 | const int sentinel = SharedFunctionInfo::kDontAdaptArgumentsSentinel; |
| 1565 | if (expected.immediate() == sentinel) { |
| 1566 | // Don't worry about adapting arguments for builtins that |
| 1567 | // don't want that done. Skip adaption code by making it look |
| 1568 | // like we have a match between expected and actual number of |
| 1569 | // arguments. |
| 1570 | definitely_matches = true; |
| 1571 | } else { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1572 | *definitely_mismatches = true; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1573 | mov(r2, Operand(expected.immediate())); |
| 1574 | } |
| 1575 | } |
| 1576 | } else { |
| 1577 | if (actual.is_immediate()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1578 | mov(r0, Operand(actual.immediate())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1579 | cmp(expected.reg(), Operand(actual.immediate())); |
| 1580 | b(eq, ®ular_invoke); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1581 | } else { |
| 1582 | cmp(expected.reg(), Operand(actual.reg())); |
| 1583 | b(eq, ®ular_invoke); |
| 1584 | } |
| 1585 | } |
| 1586 | |
| 1587 | if (!definitely_matches) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1588 | Handle<Code> adaptor = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1589 | isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1590 | if (flag == CALL_FUNCTION) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1591 | call_wrapper.BeforeCall(CallSize(adaptor)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1592 | Call(adaptor); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1593 | call_wrapper.AfterCall(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1594 | if (!*definitely_mismatches) { |
| 1595 | b(done); |
| 1596 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1597 | } else { |
| 1598 | Jump(adaptor, RelocInfo::CODE_TARGET); |
| 1599 | } |
| 1600 | bind(®ular_invoke); |
| 1601 | } |
| 1602 | } |
| 1603 | |
| 1604 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1605 | void MacroAssembler::FloodFunctionIfStepping(Register fun, Register new_target, |
| 1606 | const ParameterCount& expected, |
| 1607 | const ParameterCount& actual) { |
| 1608 | Label skip_flooding; |
| 1609 | ExternalReference step_in_enabled = |
| 1610 | ExternalReference::debug_step_in_enabled_address(isolate()); |
| 1611 | mov(r4, Operand(step_in_enabled)); |
| 1612 | ldrb(r4, MemOperand(r4)); |
| 1613 | cmp(r4, Operand(0)); |
| 1614 | b(eq, &skip_flooding); |
| 1615 | { |
| 1616 | FrameScope frame(this, |
| 1617 | has_frame() ? StackFrame::NONE : StackFrame::INTERNAL); |
| 1618 | if (expected.is_reg()) { |
| 1619 | SmiTag(expected.reg()); |
| 1620 | Push(expected.reg()); |
| 1621 | } |
| 1622 | if (actual.is_reg()) { |
| 1623 | SmiTag(actual.reg()); |
| 1624 | Push(actual.reg()); |
| 1625 | } |
| 1626 | if (new_target.is_valid()) { |
| 1627 | Push(new_target); |
| 1628 | } |
| 1629 | Push(fun); |
| 1630 | Push(fun); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1631 | CallRuntime(Runtime::kDebugPrepareStepInIfStepping); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1632 | Pop(fun); |
| 1633 | if (new_target.is_valid()) { |
| 1634 | Pop(new_target); |
| 1635 | } |
| 1636 | if (actual.is_reg()) { |
| 1637 | Pop(actual.reg()); |
| 1638 | SmiUntag(actual.reg()); |
| 1639 | } |
| 1640 | if (expected.is_reg()) { |
| 1641 | Pop(expected.reg()); |
| 1642 | SmiUntag(expected.reg()); |
| 1643 | } |
| 1644 | } |
| 1645 | bind(&skip_flooding); |
| 1646 | } |
| 1647 | |
| 1648 | |
| 1649 | void MacroAssembler::InvokeFunctionCode(Register function, Register new_target, |
| 1650 | const ParameterCount& expected, |
| 1651 | const ParameterCount& actual, |
| 1652 | InvokeFlag flag, |
| 1653 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1654 | // You can't call a function without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1655 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1656 | DCHECK(function.is(r1)); |
| 1657 | DCHECK_IMPLIES(new_target.is_valid(), new_target.is(r3)); |
| 1658 | |
| 1659 | if (call_wrapper.NeedsDebugStepCheck()) { |
| 1660 | FloodFunctionIfStepping(function, new_target, expected, actual); |
| 1661 | } |
| 1662 | |
| 1663 | // Clear the new.target register if not given. |
| 1664 | if (!new_target.is_valid()) { |
| 1665 | LoadRoot(r3, Heap::kUndefinedValueRootIndex); |
| 1666 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1667 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1668 | Label done; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1669 | bool definitely_mismatches = false; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1670 | InvokePrologue(expected, actual, &done, &definitely_mismatches, flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1671 | call_wrapper); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1672 | if (!definitely_mismatches) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1673 | // We call indirectly through the code field in the function to |
| 1674 | // allow recompilation to take effect without changing any of the |
| 1675 | // call sites. |
| 1676 | Register code = r4; |
| 1677 | ldr(code, FieldMemOperand(function, JSFunction::kCodeEntryOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1678 | if (flag == CALL_FUNCTION) { |
| 1679 | call_wrapper.BeforeCall(CallSize(code)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1680 | Call(code); |
| 1681 | call_wrapper.AfterCall(); |
| 1682 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1683 | DCHECK(flag == JUMP_FUNCTION); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1684 | Jump(code); |
| 1685 | } |
Ben Murdoch | 85b7179 | 2012-04-11 18:30:58 +0100 | [diff] [blame] | 1686 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1687 | // Continue here if InvokePrologue does handle the invocation due to |
| 1688 | // mismatched parameter counts. |
| 1689 | bind(&done); |
| 1690 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1691 | } |
| 1692 | |
| 1693 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1694 | void MacroAssembler::InvokeFunction(Register fun, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1695 | Register new_target, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1696 | const ParameterCount& actual, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1697 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1698 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1699 | // You can't call a function without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1700 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1701 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1702 | // Contract with called JS functions requires that function is passed in r1. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1703 | DCHECK(fun.is(r1)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1704 | |
| 1705 | Register expected_reg = r2; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1706 | Register temp_reg = r4; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1707 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1708 | ldr(temp_reg, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1709 | ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 1710 | ldr(expected_reg, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1711 | FieldMemOperand(temp_reg, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1712 | SharedFunctionInfo::kFormalParameterCountOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1713 | SmiUntag(expected_reg); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1714 | |
| 1715 | ParameterCount expected(expected_reg); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1716 | InvokeFunctionCode(fun, new_target, expected, actual, flag, call_wrapper); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1717 | } |
| 1718 | |
| 1719 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1720 | void MacroAssembler::InvokeFunction(Register function, |
| 1721 | const ParameterCount& expected, |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1722 | const ParameterCount& actual, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1723 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1724 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1725 | // You can't call a function without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1726 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
| 1727 | |
| 1728 | // Contract with called JS functions requires that function is passed in r1. |
| 1729 | DCHECK(function.is(r1)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1730 | |
| 1731 | // Get the function and setup the context. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1732 | ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 1733 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1734 | InvokeFunctionCode(r1, no_reg, expected, actual, flag, call_wrapper); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1735 | } |
| 1736 | |
| 1737 | |
| 1738 | void MacroAssembler::InvokeFunction(Handle<JSFunction> function, |
| 1739 | const ParameterCount& expected, |
| 1740 | const ParameterCount& actual, |
| 1741 | InvokeFlag flag, |
| 1742 | const CallWrapper& call_wrapper) { |
| 1743 | Move(r1, function); |
| 1744 | InvokeFunction(r1, expected, actual, flag, call_wrapper); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1745 | } |
| 1746 | |
| 1747 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1748 | void MacroAssembler::IsObjectJSStringType(Register object, |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1749 | Register scratch, |
| 1750 | Label* fail) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1751 | DCHECK(kNotStringTag != 0); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1752 | |
| 1753 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 1754 | ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| 1755 | tst(scratch, Operand(kIsNotStringMask)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1756 | b(ne, fail); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1757 | } |
| 1758 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1759 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1760 | void MacroAssembler::IsObjectNameType(Register object, |
| 1761 | Register scratch, |
| 1762 | Label* fail) { |
| 1763 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 1764 | ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| 1765 | cmp(scratch, Operand(LAST_NAME_TYPE)); |
| 1766 | b(hi, fail); |
| 1767 | } |
| 1768 | |
| 1769 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1770 | void MacroAssembler::DebugBreak() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1771 | mov(r0, Operand::Zero()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1772 | mov(r1, |
| 1773 | Operand(ExternalReference(Runtime::kHandleDebuggerStatement, isolate()))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1774 | CEntryStub ces(isolate(), 1); |
| 1775 | DCHECK(AllowThisStubCall(&ces)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1776 | Call(ces.GetCode(), RelocInfo::DEBUGGER_STATEMENT); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1777 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1778 | |
| 1779 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1780 | void MacroAssembler::PushStackHandler() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1781 | // Adjust this code if not the case. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1782 | STATIC_ASSERT(StackHandlerConstants::kSize == 1 * kPointerSize); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1783 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1784 | |
| 1785 | // Link the current handler as the next handler. |
| 1786 | mov(r6, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| 1787 | ldr(r5, MemOperand(r6)); |
| 1788 | push(r5); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1789 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1790 | // Set this new handler as the current one. |
| 1791 | str(sp, MemOperand(r6)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1792 | } |
| 1793 | |
| 1794 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1795 | void MacroAssembler::PopStackHandler() { |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1796 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1797 | pop(r1); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1798 | mov(ip, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1799 | add(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize)); |
| 1800 | str(r1, MemOperand(ip)); |
| 1801 | } |
| 1802 | |
| 1803 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1804 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 1805 | Register scratch, |
| 1806 | Label* miss) { |
| 1807 | Label same_contexts; |
| 1808 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1809 | DCHECK(!holder_reg.is(scratch)); |
| 1810 | DCHECK(!holder_reg.is(ip)); |
| 1811 | DCHECK(!scratch.is(ip)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1812 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1813 | // Load current lexical context from the active StandardFrame, which |
| 1814 | // may require crawling past STUB frames. |
| 1815 | Label load_context; |
| 1816 | Label has_context; |
| 1817 | DCHECK(!ip.is(scratch)); |
| 1818 | mov(ip, fp); |
| 1819 | bind(&load_context); |
| 1820 | ldr(scratch, MemOperand(ip, CommonFrameConstants::kContextOrFrameTypeOffset)); |
| 1821 | JumpIfNotSmi(scratch, &has_context); |
| 1822 | ldr(ip, MemOperand(ip, CommonFrameConstants::kCallerFPOffset)); |
| 1823 | b(&load_context); |
| 1824 | bind(&has_context); |
| 1825 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1826 | // In debug mode, make sure the lexical context is set. |
| 1827 | #ifdef DEBUG |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1828 | cmp(scratch, Operand::Zero()); |
| 1829 | Check(ne, kWeShouldNotHaveAnEmptyLexicalContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1830 | #endif |
| 1831 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1832 | // Load the native context of the current context. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1833 | ldr(scratch, ContextMemOperand(scratch, Context::NATIVE_CONTEXT_INDEX)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1834 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1835 | // Check the context is a native context. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1836 | if (emit_debug_code()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1837 | // Cannot use ip as a temporary in this verification code. Due to the fact |
| 1838 | // that ip is clobbered as part of cmp with an object Operand. |
| 1839 | push(holder_reg); // Temporarily save holder on the stack. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1840 | // Read the first word and compare to the native_context_map. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1841 | ldr(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1842 | LoadRoot(ip, Heap::kNativeContextMapRootIndex); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1843 | cmp(holder_reg, ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1844 | Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1845 | pop(holder_reg); // Restore holder. |
| 1846 | } |
| 1847 | |
| 1848 | // Check if both contexts are the same. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1849 | ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1850 | cmp(scratch, Operand(ip)); |
| 1851 | b(eq, &same_contexts); |
| 1852 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1853 | // Check the context is a native context. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1854 | if (emit_debug_code()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1855 | // Cannot use ip as a temporary in this verification code. Due to the fact |
| 1856 | // that ip is clobbered as part of cmp with an object Operand. |
| 1857 | push(holder_reg); // Temporarily save holder on the stack. |
| 1858 | mov(holder_reg, ip); // Move ip to its holding place. |
| 1859 | LoadRoot(ip, Heap::kNullValueRootIndex); |
| 1860 | cmp(holder_reg, ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1861 | Check(ne, kJSGlobalProxyContextShouldNotBeNull); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1862 | |
| 1863 | ldr(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1864 | LoadRoot(ip, Heap::kNativeContextMapRootIndex); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1865 | cmp(holder_reg, ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1866 | Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1867 | // Restore ip is not needed. ip is reloaded below. |
| 1868 | pop(holder_reg); // Restore holder. |
| 1869 | // Restore ip to holder's context. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1870 | ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1871 | } |
| 1872 | |
| 1873 | // Check that the security token in the calling global object is |
| 1874 | // compatible with the security token in the receiving global |
| 1875 | // object. |
| 1876 | int token_offset = Context::kHeaderSize + |
| 1877 | Context::SECURITY_TOKEN_INDEX * kPointerSize; |
| 1878 | |
| 1879 | ldr(scratch, FieldMemOperand(scratch, token_offset)); |
| 1880 | ldr(ip, FieldMemOperand(ip, token_offset)); |
| 1881 | cmp(scratch, Operand(ip)); |
| 1882 | b(ne, miss); |
| 1883 | |
| 1884 | bind(&same_contexts); |
| 1885 | } |
| 1886 | |
| 1887 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1888 | // Compute the hash code from the untagged key. This must be kept in sync with |
| 1889 | // ComputeIntegerHash in utils.h and KeyedLoadGenericStub in |
| 1890 | // code-stub-hydrogen.cc |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1891 | void MacroAssembler::GetNumberHash(Register t0, Register scratch) { |
| 1892 | // First of all we assign the hash seed to scratch. |
| 1893 | LoadRoot(scratch, Heap::kHashSeedRootIndex); |
| 1894 | SmiUntag(scratch); |
| 1895 | |
| 1896 | // Xor original key with a seed. |
| 1897 | eor(t0, t0, Operand(scratch)); |
| 1898 | |
| 1899 | // Compute the hash code from the untagged key. This must be kept in sync |
| 1900 | // with ComputeIntegerHash in utils.h. |
| 1901 | // |
| 1902 | // hash = ~hash + (hash << 15); |
| 1903 | mvn(scratch, Operand(t0)); |
| 1904 | add(t0, scratch, Operand(t0, LSL, 15)); |
| 1905 | // hash = hash ^ (hash >> 12); |
| 1906 | eor(t0, t0, Operand(t0, LSR, 12)); |
| 1907 | // hash = hash + (hash << 2); |
| 1908 | add(t0, t0, Operand(t0, LSL, 2)); |
| 1909 | // hash = hash ^ (hash >> 4); |
| 1910 | eor(t0, t0, Operand(t0, LSR, 4)); |
| 1911 | // hash = hash * 2057; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1912 | mov(scratch, Operand(t0, LSL, 11)); |
| 1913 | add(t0, t0, Operand(t0, LSL, 3)); |
| 1914 | add(t0, t0, scratch); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1915 | // hash = hash ^ (hash >> 16); |
| 1916 | eor(t0, t0, Operand(t0, LSR, 16)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1917 | bic(t0, t0, Operand(0xc0000000u)); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1918 | } |
| 1919 | |
| 1920 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1921 | void MacroAssembler::LoadFromNumberDictionary(Label* miss, |
| 1922 | Register elements, |
| 1923 | Register key, |
| 1924 | Register result, |
| 1925 | Register t0, |
| 1926 | Register t1, |
| 1927 | Register t2) { |
| 1928 | // Register use: |
| 1929 | // |
| 1930 | // elements - holds the slow-case elements of the receiver on entry. |
| 1931 | // Unchanged unless 'result' is the same register. |
| 1932 | // |
| 1933 | // key - holds the smi key on entry. |
| 1934 | // Unchanged unless 'result' is the same register. |
| 1935 | // |
| 1936 | // result - holds the result on exit if the load succeeded. |
| 1937 | // Allowed to be the same as 'key' or 'result'. |
| 1938 | // Unchanged on bailout so 'key' or 'result' can be used |
| 1939 | // in further computation. |
| 1940 | // |
| 1941 | // Scratch registers: |
| 1942 | // |
| 1943 | // t0 - holds the untagged key on entry and holds the hash once computed. |
| 1944 | // |
| 1945 | // t1 - used to hold the capacity mask of the dictionary |
| 1946 | // |
| 1947 | // t2 - used for the index into the dictionary. |
| 1948 | Label done; |
| 1949 | |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1950 | GetNumberHash(t0, t1); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1951 | |
| 1952 | // Compute the capacity mask. |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1953 | ldr(t1, FieldMemOperand(elements, SeededNumberDictionary::kCapacityOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1954 | SmiUntag(t1); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1955 | sub(t1, t1, Operand(1)); |
| 1956 | |
| 1957 | // Generate an unrolled loop that performs a few probes before giving up. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1958 | for (int i = 0; i < kNumberDictionaryProbes; i++) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1959 | // Use t2 for index calculations and keep the hash intact in t0. |
| 1960 | mov(t2, t0); |
| 1961 | // Compute the masked index: (hash + i + i * i) & mask. |
| 1962 | if (i > 0) { |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1963 | add(t2, t2, Operand(SeededNumberDictionary::GetProbeOffset(i))); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1964 | } |
| 1965 | and_(t2, t2, Operand(t1)); |
| 1966 | |
| 1967 | // Scale the index by multiplying by the element size. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1968 | DCHECK(SeededNumberDictionary::kEntrySize == 3); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1969 | add(t2, t2, Operand(t2, LSL, 1)); // t2 = t2 * 3 |
| 1970 | |
| 1971 | // Check if the key is identical to the name. |
| 1972 | add(t2, elements, Operand(t2, LSL, kPointerSizeLog2)); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1973 | ldr(ip, FieldMemOperand(t2, SeededNumberDictionary::kElementsStartOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1974 | cmp(key, Operand(ip)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1975 | if (i != kNumberDictionaryProbes - 1) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1976 | b(eq, &done); |
| 1977 | } else { |
| 1978 | b(ne, miss); |
| 1979 | } |
| 1980 | } |
| 1981 | |
| 1982 | bind(&done); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1983 | // Check that the value is a field property. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1984 | // t2: elements + (index * kPointerSize) |
| 1985 | const int kDetailsOffset = |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1986 | SeededNumberDictionary::kElementsStartOffset + 2 * kPointerSize; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1987 | ldr(t1, FieldMemOperand(t2, kDetailsOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1988 | DCHECK_EQ(DATA, 0); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1989 | tst(t1, Operand(Smi::FromInt(PropertyDetails::TypeField::kMask))); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1990 | b(ne, miss); |
| 1991 | |
| 1992 | // Get the value at the masked, scaled index and return. |
| 1993 | const int kValueOffset = |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1994 | SeededNumberDictionary::kElementsStartOffset + kPointerSize; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1995 | ldr(result, FieldMemOperand(t2, kValueOffset)); |
| 1996 | } |
| 1997 | |
| 1998 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1999 | void MacroAssembler::Allocate(int object_size, |
| 2000 | Register result, |
| 2001 | Register scratch1, |
| 2002 | Register scratch2, |
| 2003 | Label* gc_required, |
| 2004 | AllocationFlags flags) { |
| 2005 | DCHECK(object_size <= Page::kMaxRegularHeapObjectSize); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 2006 | if (!FLAG_inline_new) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2007 | if (emit_debug_code()) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 2008 | // Trash the registers to simulate an allocation failure. |
| 2009 | mov(result, Operand(0x7091)); |
| 2010 | mov(scratch1, Operand(0x7191)); |
| 2011 | mov(scratch2, Operand(0x7291)); |
| 2012 | } |
| 2013 | jmp(gc_required); |
| 2014 | return; |
| 2015 | } |
| 2016 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2017 | DCHECK(!AreAliased(result, scratch1, scratch2, ip)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2018 | |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 2019 | // Make object size into bytes. |
| 2020 | if ((flags & SIZE_IN_WORDS) != 0) { |
| 2021 | object_size *= kPointerSize; |
| 2022 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2023 | DCHECK_EQ(0, object_size & kObjectAlignmentMask); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 2024 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2025 | // Check relative positions of allocation top and limit addresses. |
| 2026 | // The values must be adjacent in memory to allow the use of LDM. |
| 2027 | // Also, assert that the registers are numbered such that the values |
| 2028 | // are loaded in the correct order. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2029 | ExternalReference allocation_top = |
| 2030 | AllocationUtils::GetAllocationTopReference(isolate(), flags); |
| 2031 | ExternalReference allocation_limit = |
| 2032 | AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2033 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2034 | intptr_t top = reinterpret_cast<intptr_t>(allocation_top.address()); |
| 2035 | intptr_t limit = reinterpret_cast<intptr_t>(allocation_limit.address()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2036 | DCHECK((limit - top) == kPointerSize); |
| 2037 | DCHECK(result.code() < ip.code()); |
| 2038 | |
| 2039 | // Set up allocation top address register. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2040 | Register top_address = scratch1; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2041 | // This code stores a temporary value in ip. This is OK, as the code below |
| 2042 | // does not need ip for implicit literal generation. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2043 | Register alloc_limit = ip; |
| 2044 | Register result_end = scratch2; |
| 2045 | mov(top_address, Operand(allocation_top)); |
| 2046 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2047 | if ((flags & RESULT_CONTAINS_TOP) == 0) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2048 | // Load allocation top into result and allocation limit into alloc_limit. |
| 2049 | ldm(ia, top_address, result.bit() | alloc_limit.bit()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2050 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2051 | if (emit_debug_code()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2052 | // Assert that result actually contains top on entry. |
| 2053 | ldr(alloc_limit, MemOperand(top_address)); |
| 2054 | cmp(result, alloc_limit); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2055 | Check(eq, kUnexpectedAllocationTop); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2056 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2057 | // Load allocation limit. Result already contains allocation top. |
| 2058 | ldr(alloc_limit, MemOperand(top_address, limit - top)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2059 | } |
| 2060 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2061 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| 2062 | // Align the next allocation. Storing the filler map without checking top is |
| 2063 | // safe in new-space because the limit of the heap is aligned there. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2064 | STATIC_ASSERT(kPointerAlignment * 2 == kDoubleAlignment); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2065 | and_(result_end, result, Operand(kDoubleAlignmentMask), SetCC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2066 | Label aligned; |
| 2067 | b(eq, &aligned); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2068 | if ((flags & PRETENURE) != 0) { |
| 2069 | cmp(result, Operand(alloc_limit)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2070 | b(hs, gc_required); |
| 2071 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2072 | mov(result_end, Operand(isolate()->factory()->one_pointer_filler_map())); |
| 2073 | str(result_end, MemOperand(result, kDoubleSize / 2, PostIndex)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2074 | bind(&aligned); |
| 2075 | } |
| 2076 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2077 | // Calculate new top and bail out if new space is exhausted. Use result |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2078 | // to calculate the new top. We must preserve the ip register at this |
| 2079 | // point, so we cannot just use add(). |
| 2080 | DCHECK(object_size > 0); |
| 2081 | Register source = result; |
| 2082 | Condition cond = al; |
| 2083 | int shift = 0; |
| 2084 | while (object_size != 0) { |
| 2085 | if (((object_size >> shift) & 0x03) == 0) { |
| 2086 | shift += 2; |
| 2087 | } else { |
| 2088 | int bits = object_size & (0xff << shift); |
| 2089 | object_size -= bits; |
| 2090 | shift += 8; |
| 2091 | Operand bits_operand(bits); |
| 2092 | DCHECK(bits_operand.instructions_required(this) == 1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2093 | add(result_end, source, bits_operand, SetCC, cond); |
| 2094 | source = result_end; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2095 | cond = cc; |
| 2096 | } |
| 2097 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2098 | b(cs, gc_required); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2099 | cmp(result_end, Operand(alloc_limit)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2100 | b(hi, gc_required); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2101 | str(result_end, MemOperand(top_address)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2102 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2103 | // Tag object if requested. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2104 | if ((flags & TAG_OBJECT) != 0) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2105 | add(result, result, Operand(kHeapObjectTag)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2106 | } |
| 2107 | } |
| 2108 | |
| 2109 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2110 | void MacroAssembler::Allocate(Register object_size, Register result, |
| 2111 | Register result_end, Register scratch, |
| 2112 | Label* gc_required, AllocationFlags flags) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 2113 | if (!FLAG_inline_new) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2114 | if (emit_debug_code()) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 2115 | // Trash the registers to simulate an allocation failure. |
| 2116 | mov(result, Operand(0x7091)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2117 | mov(scratch, Operand(0x7191)); |
| 2118 | mov(result_end, Operand(0x7291)); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 2119 | } |
| 2120 | jmp(gc_required); |
| 2121 | return; |
| 2122 | } |
| 2123 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2124 | // |object_size| and |result_end| may overlap if the DOUBLE_ALIGNMENT flag |
| 2125 | // is not specified. Other registers must not overlap. |
| 2126 | DCHECK(!AreAliased(object_size, result, scratch, ip)); |
| 2127 | DCHECK(!AreAliased(result_end, result, scratch, ip)); |
| 2128 | DCHECK((flags & DOUBLE_ALIGNMENT) == 0 || !object_size.is(result_end)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2129 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2130 | // Check relative positions of allocation top and limit addresses. |
| 2131 | // The values must be adjacent in memory to allow the use of LDM. |
| 2132 | // Also, assert that the registers are numbered such that the values |
| 2133 | // are loaded in the correct order. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2134 | ExternalReference allocation_top = |
| 2135 | AllocationUtils::GetAllocationTopReference(isolate(), flags); |
| 2136 | ExternalReference allocation_limit = |
| 2137 | AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2138 | intptr_t top = reinterpret_cast<intptr_t>(allocation_top.address()); |
| 2139 | intptr_t limit = reinterpret_cast<intptr_t>(allocation_limit.address()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2140 | DCHECK((limit - top) == kPointerSize); |
| 2141 | DCHECK(result.code() < ip.code()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2142 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2143 | // Set up allocation top address and allocation limit registers. |
| 2144 | Register top_address = scratch; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2145 | // This code stores a temporary value in ip. This is OK, as the code below |
| 2146 | // does not need ip for implicit literal generation. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2147 | Register alloc_limit = ip; |
| 2148 | mov(top_address, Operand(allocation_top)); |
| 2149 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2150 | if ((flags & RESULT_CONTAINS_TOP) == 0) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2151 | // Load allocation top into result and allocation limit into alloc_limit. |
| 2152 | ldm(ia, top_address, result.bit() | alloc_limit.bit()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2153 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2154 | if (emit_debug_code()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2155 | // Assert that result actually contains top on entry. |
| 2156 | ldr(alloc_limit, MemOperand(top_address)); |
| 2157 | cmp(result, alloc_limit); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2158 | Check(eq, kUnexpectedAllocationTop); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2159 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2160 | // Load allocation limit. Result already contains allocation top. |
| 2161 | ldr(alloc_limit, MemOperand(top_address, limit - top)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2162 | } |
| 2163 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2164 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| 2165 | // Align the next allocation. Storing the filler map without checking top is |
| 2166 | // safe in new-space because the limit of the heap is aligned there. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2167 | DCHECK(kPointerAlignment * 2 == kDoubleAlignment); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2168 | and_(result_end, result, Operand(kDoubleAlignmentMask), SetCC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2169 | Label aligned; |
| 2170 | b(eq, &aligned); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2171 | if ((flags & PRETENURE) != 0) { |
| 2172 | cmp(result, Operand(alloc_limit)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2173 | b(hs, gc_required); |
| 2174 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2175 | mov(result_end, Operand(isolate()->factory()->one_pointer_filler_map())); |
| 2176 | str(result_end, MemOperand(result, kDoubleSize / 2, PostIndex)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2177 | bind(&aligned); |
| 2178 | } |
| 2179 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2180 | // Calculate new top and bail out if new space is exhausted. Use result |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2181 | // to calculate the new top. Object size may be in words so a shift is |
| 2182 | // required to get the number of bytes. |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 2183 | if ((flags & SIZE_IN_WORDS) != 0) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2184 | add(result_end, result, Operand(object_size, LSL, kPointerSizeLog2), SetCC); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 2185 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2186 | add(result_end, result, Operand(object_size), SetCC); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 2187 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2188 | b(cs, gc_required); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2189 | cmp(result_end, Operand(alloc_limit)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2190 | b(hi, gc_required); |
| 2191 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2192 | // Update allocation top. result temporarily holds the new top. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2193 | if (emit_debug_code()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2194 | tst(result_end, Operand(kObjectAlignmentMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2195 | Check(eq, kUnalignedAllocationInNewSpace); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2196 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2197 | str(result_end, MemOperand(top_address)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2198 | |
| 2199 | // Tag object if requested. |
| 2200 | if ((flags & TAG_OBJECT) != 0) { |
| 2201 | add(result, result, Operand(kHeapObjectTag)); |
| 2202 | } |
| 2203 | } |
| 2204 | |
| 2205 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2206 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 2207 | Register length, |
| 2208 | Register scratch1, |
| 2209 | Register scratch2, |
| 2210 | Register scratch3, |
| 2211 | Label* gc_required) { |
| 2212 | // Calculate the number of bytes needed for the characters in the string while |
| 2213 | // observing object alignment. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2214 | DCHECK((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2215 | mov(scratch1, Operand(length, LSL, 1)); // Length in bytes, not chars. |
| 2216 | add(scratch1, scratch1, |
| 2217 | Operand(kObjectAlignmentMask + SeqTwoByteString::kHeaderSize)); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 2218 | and_(scratch1, scratch1, Operand(~kObjectAlignmentMask)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2219 | |
| 2220 | // Allocate two-byte string in new space. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2221 | Allocate(scratch1, |
| 2222 | result, |
| 2223 | scratch2, |
| 2224 | scratch3, |
| 2225 | gc_required, |
| 2226 | TAG_OBJECT); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2227 | |
| 2228 | // Set the map, length and hash field. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2229 | InitializeNewString(result, |
| 2230 | length, |
| 2231 | Heap::kStringMapRootIndex, |
| 2232 | scratch1, |
| 2233 | scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2234 | } |
| 2235 | |
| 2236 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2237 | void MacroAssembler::AllocateOneByteString(Register result, Register length, |
| 2238 | Register scratch1, Register scratch2, |
| 2239 | Register scratch3, |
| 2240 | Label* gc_required) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2241 | // Calculate the number of bytes needed for the characters in the string while |
| 2242 | // observing object alignment. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2243 | DCHECK((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 2244 | DCHECK(kCharSize == 1); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2245 | add(scratch1, length, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2246 | Operand(kObjectAlignmentMask + SeqOneByteString::kHeaderSize)); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 2247 | and_(scratch1, scratch1, Operand(~kObjectAlignmentMask)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2248 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2249 | // Allocate one-byte string in new space. |
| 2250 | Allocate(scratch1, |
| 2251 | result, |
| 2252 | scratch2, |
| 2253 | scratch3, |
| 2254 | gc_required, |
| 2255 | TAG_OBJECT); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2256 | |
| 2257 | // Set the map, length and hash field. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2258 | InitializeNewString(result, length, Heap::kOneByteStringMapRootIndex, |
| 2259 | scratch1, scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2260 | } |
| 2261 | |
| 2262 | |
| 2263 | void MacroAssembler::AllocateTwoByteConsString(Register result, |
| 2264 | Register length, |
| 2265 | Register scratch1, |
| 2266 | Register scratch2, |
| 2267 | Label* gc_required) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2268 | Allocate(ConsString::kSize, result, scratch1, scratch2, gc_required, |
| 2269 | TAG_OBJECT); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2270 | |
| 2271 | InitializeNewString(result, |
| 2272 | length, |
| 2273 | Heap::kConsStringMapRootIndex, |
| 2274 | scratch1, |
| 2275 | scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2276 | } |
| 2277 | |
| 2278 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2279 | void MacroAssembler::AllocateOneByteConsString(Register result, Register length, |
| 2280 | Register scratch1, |
| 2281 | Register scratch2, |
| 2282 | Label* gc_required) { |
| 2283 | Allocate(ConsString::kSize, |
| 2284 | result, |
| 2285 | scratch1, |
| 2286 | scratch2, |
| 2287 | gc_required, |
| 2288 | TAG_OBJECT); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2289 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2290 | InitializeNewString(result, length, Heap::kConsOneByteStringMapRootIndex, |
| 2291 | scratch1, scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2292 | } |
| 2293 | |
| 2294 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2295 | void MacroAssembler::AllocateTwoByteSlicedString(Register result, |
| 2296 | Register length, |
| 2297 | Register scratch1, |
| 2298 | Register scratch2, |
| 2299 | Label* gc_required) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2300 | Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
| 2301 | TAG_OBJECT); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2302 | |
| 2303 | InitializeNewString(result, |
| 2304 | length, |
| 2305 | Heap::kSlicedStringMapRootIndex, |
| 2306 | scratch1, |
| 2307 | scratch2); |
| 2308 | } |
| 2309 | |
| 2310 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2311 | void MacroAssembler::AllocateOneByteSlicedString(Register result, |
| 2312 | Register length, |
| 2313 | Register scratch1, |
| 2314 | Register scratch2, |
| 2315 | Label* gc_required) { |
| 2316 | Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
| 2317 | TAG_OBJECT); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2318 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2319 | InitializeNewString(result, length, Heap::kSlicedOneByteStringMapRootIndex, |
| 2320 | scratch1, scratch2); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2321 | } |
| 2322 | |
| 2323 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2324 | void MacroAssembler::CompareObjectType(Register object, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2325 | Register map, |
| 2326 | Register type_reg, |
| 2327 | InstanceType type) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2328 | const Register temp = type_reg.is(no_reg) ? ip : type_reg; |
| 2329 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2330 | ldr(map, FieldMemOperand(object, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2331 | CompareInstanceType(map, temp, type); |
| 2332 | } |
| 2333 | |
| 2334 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2335 | void MacroAssembler::CompareInstanceType(Register map, |
| 2336 | Register type_reg, |
| 2337 | InstanceType type) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2338 | // Registers map and type_reg can be ip. These two lines assert |
| 2339 | // that ip can be used with the two instructions (the constants |
| 2340 | // will never need ip). |
| 2341 | STATIC_ASSERT(Map::kInstanceTypeOffset < 4096); |
| 2342 | STATIC_ASSERT(LAST_TYPE < 256); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2343 | ldrb(type_reg, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 2344 | cmp(type_reg, Operand(type)); |
| 2345 | } |
| 2346 | |
| 2347 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2348 | void MacroAssembler::CompareRoot(Register obj, |
| 2349 | Heap::RootListIndex index) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2350 | DCHECK(!obj.is(ip)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2351 | LoadRoot(ip, index); |
| 2352 | cmp(obj, ip); |
| 2353 | } |
| 2354 | |
| 2355 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2356 | void MacroAssembler::CheckFastElements(Register map, |
| 2357 | Register scratch, |
| 2358 | Label* fail) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2359 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 2360 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 2361 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 2362 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2363 | ldrb(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2364 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2365 | b(hi, fail); |
| 2366 | } |
| 2367 | |
| 2368 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2369 | void MacroAssembler::CheckFastObjectElements(Register map, |
| 2370 | Register scratch, |
| 2371 | Label* fail) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2372 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 2373 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 2374 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 2375 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2376 | ldrb(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2377 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2378 | b(ls, fail); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2379 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2380 | b(hi, fail); |
| 2381 | } |
| 2382 | |
| 2383 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2384 | void MacroAssembler::CheckFastSmiElements(Register map, |
| 2385 | Register scratch, |
| 2386 | Label* fail) { |
| 2387 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 2388 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2389 | ldrb(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2390 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2391 | b(hi, fail); |
| 2392 | } |
| 2393 | |
| 2394 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2395 | void MacroAssembler::StoreNumberToDoubleElements( |
| 2396 | Register value_reg, |
| 2397 | Register key_reg, |
| 2398 | Register elements_reg, |
| 2399 | Register scratch1, |
| 2400 | LowDwVfpRegister double_scratch, |
| 2401 | Label* fail, |
| 2402 | int elements_offset) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2403 | DCHECK(!AreAliased(value_reg, key_reg, elements_reg, scratch1)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2404 | Label smi_value, store; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2405 | |
| 2406 | // Handle smi values specially. |
| 2407 | JumpIfSmi(value_reg, &smi_value); |
| 2408 | |
| 2409 | // Ensure that the object is a heap number |
| 2410 | CheckMap(value_reg, |
| 2411 | scratch1, |
| 2412 | isolate()->factory()->heap_number_map(), |
| 2413 | fail, |
| 2414 | DONT_DO_SMI_CHECK); |
| 2415 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2416 | vldr(double_scratch, FieldMemOperand(value_reg, HeapNumber::kValueOffset)); |
| 2417 | // Force a canonical NaN. |
| 2418 | if (emit_debug_code()) { |
| 2419 | vmrs(ip); |
| 2420 | tst(ip, Operand(kVFPDefaultNaNModeControlBit)); |
| 2421 | Assert(ne, kDefaultNaNModeNotSet); |
| 2422 | } |
| 2423 | VFPCanonicalizeNaN(double_scratch); |
| 2424 | b(&store); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2425 | |
| 2426 | bind(&smi_value); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2427 | SmiToDouble(double_scratch, value_reg); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2428 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2429 | bind(&store); |
| 2430 | add(scratch1, elements_reg, Operand::DoubleOffsetFromSmiKey(key_reg)); |
| 2431 | vstr(double_scratch, |
| 2432 | FieldMemOperand(scratch1, |
| 2433 | FixedDoubleArray::kHeaderSize - elements_offset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2434 | } |
| 2435 | |
| 2436 | |
| 2437 | void MacroAssembler::CompareMap(Register obj, |
| 2438 | Register scratch, |
| 2439 | Handle<Map> map, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2440 | Label* early_success) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2441 | ldr(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2442 | CompareMap(scratch, map, early_success); |
| 2443 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2444 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2445 | |
| 2446 | void MacroAssembler::CompareMap(Register obj_map, |
| 2447 | Handle<Map> map, |
| 2448 | Label* early_success) { |
| 2449 | cmp(obj_map, Operand(map)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2450 | } |
| 2451 | |
| 2452 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2453 | void MacroAssembler::CheckMap(Register obj, |
| 2454 | Register scratch, |
| 2455 | Handle<Map> map, |
| 2456 | Label* fail, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2457 | SmiCheckType smi_check_type) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2458 | if (smi_check_type == DO_SMI_CHECK) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2459 | JumpIfSmi(obj, fail); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2460 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2461 | |
| 2462 | Label success; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2463 | CompareMap(obj, scratch, map, &success); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2464 | b(ne, fail); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2465 | bind(&success); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2466 | } |
| 2467 | |
| 2468 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2469 | void MacroAssembler::CheckMap(Register obj, |
| 2470 | Register scratch, |
| 2471 | Heap::RootListIndex index, |
| 2472 | Label* fail, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2473 | SmiCheckType smi_check_type) { |
| 2474 | if (smi_check_type == DO_SMI_CHECK) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2475 | JumpIfSmi(obj, fail); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2476 | } |
| 2477 | ldr(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| 2478 | LoadRoot(ip, index); |
| 2479 | cmp(scratch, ip); |
| 2480 | b(ne, fail); |
| 2481 | } |
| 2482 | |
| 2483 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2484 | void MacroAssembler::DispatchWeakMap(Register obj, Register scratch1, |
| 2485 | Register scratch2, Handle<WeakCell> cell, |
| 2486 | Handle<Code> success, |
| 2487 | SmiCheckType smi_check_type) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2488 | Label fail; |
| 2489 | if (smi_check_type == DO_SMI_CHECK) { |
| 2490 | JumpIfSmi(obj, &fail); |
| 2491 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2492 | ldr(scratch1, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| 2493 | CmpWeakValue(scratch1, cell, scratch2); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2494 | Jump(success, RelocInfo::CODE_TARGET, eq); |
| 2495 | bind(&fail); |
| 2496 | } |
| 2497 | |
| 2498 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2499 | void MacroAssembler::CmpWeakValue(Register value, Handle<WeakCell> cell, |
| 2500 | Register scratch) { |
| 2501 | mov(scratch, Operand(cell)); |
| 2502 | ldr(scratch, FieldMemOperand(scratch, WeakCell::kValueOffset)); |
| 2503 | cmp(value, scratch); |
| 2504 | } |
| 2505 | |
| 2506 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2507 | void MacroAssembler::GetWeakValue(Register value, Handle<WeakCell> cell) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2508 | mov(value, Operand(cell)); |
| 2509 | ldr(value, FieldMemOperand(value, WeakCell::kValueOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2510 | } |
| 2511 | |
| 2512 | |
| 2513 | void MacroAssembler::LoadWeakValue(Register value, Handle<WeakCell> cell, |
| 2514 | Label* miss) { |
| 2515 | GetWeakValue(value, cell); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2516 | JumpIfSmi(value, miss); |
| 2517 | } |
| 2518 | |
| 2519 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2520 | void MacroAssembler::GetMapConstructor(Register result, Register map, |
| 2521 | Register temp, Register temp2) { |
| 2522 | Label done, loop; |
| 2523 | ldr(result, FieldMemOperand(map, Map::kConstructorOrBackPointerOffset)); |
| 2524 | bind(&loop); |
| 2525 | JumpIfSmi(result, &done); |
| 2526 | CompareObjectType(result, temp, temp2, MAP_TYPE); |
| 2527 | b(ne, &done); |
| 2528 | ldr(result, FieldMemOperand(result, Map::kConstructorOrBackPointerOffset)); |
| 2529 | b(&loop); |
| 2530 | bind(&done); |
| 2531 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2532 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2533 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2534 | void MacroAssembler::TryGetFunctionPrototype(Register function, Register result, |
| 2535 | Register scratch, Label* miss) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2536 | // Get the prototype or initial map from the function. |
| 2537 | ldr(result, |
| 2538 | FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 2539 | |
| 2540 | // If the prototype or initial map is the hole, don't return it and |
| 2541 | // simply miss the cache instead. This will allow us to allocate a |
| 2542 | // prototype object on-demand in the runtime system. |
| 2543 | LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 2544 | cmp(result, ip); |
| 2545 | b(eq, miss); |
| 2546 | |
| 2547 | // If the function does not have an initial map, we're done. |
| 2548 | Label done; |
| 2549 | CompareObjectType(result, scratch, scratch, MAP_TYPE); |
| 2550 | b(ne, &done); |
| 2551 | |
| 2552 | // Get the prototype from the initial map. |
| 2553 | ldr(result, FieldMemOperand(result, Map::kPrototypeOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2554 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2555 | // All done. |
| 2556 | bind(&done); |
| 2557 | } |
| 2558 | |
| 2559 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2560 | void MacroAssembler::CallStub(CodeStub* stub, |
| 2561 | TypeFeedbackId ast_id, |
| 2562 | Condition cond) { |
| 2563 | DCHECK(AllowThisStubCall(stub)); // Stub calls are not allowed in some stubs. |
| 2564 | Call(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id, cond); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2565 | } |
| 2566 | |
| 2567 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2568 | void MacroAssembler::TailCallStub(CodeStub* stub, Condition cond) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2569 | Jump(stub->GetCode(), RelocInfo::CODE_TARGET, cond); |
| 2570 | } |
| 2571 | |
| 2572 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2573 | bool MacroAssembler::AllowThisStubCall(CodeStub* stub) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2574 | return has_frame_ || !stub->SometimesSetsUpAFrame(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2575 | } |
| 2576 | |
| 2577 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2578 | void MacroAssembler::IndexFromHash(Register hash, Register index) { |
| 2579 | // If the hash field contains an array index pick it out. The assert checks |
| 2580 | // that the constants for the maximum number of digits for an array index |
| 2581 | // cached in the hash field and the number of bits reserved for it does not |
| 2582 | // conflict. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2583 | DCHECK(TenToThe(String::kMaxCachedArrayIndexLength) < |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2584 | (1 << String::kArrayIndexValueBits)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2585 | DecodeFieldToSmi<String::ArrayIndexValueBits>(index, hash); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2586 | } |
| 2587 | |
| 2588 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2589 | void MacroAssembler::SmiToDouble(LowDwVfpRegister value, Register smi) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2590 | if (CpuFeatures::IsSupported(VFP3)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2591 | vmov(value.low(), smi); |
| 2592 | vcvt_f64_s32(value, 1); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 2593 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2594 | SmiUntag(ip, smi); |
| 2595 | vmov(value.low(), ip); |
| 2596 | vcvt_f64_s32(value, value.low()); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 2597 | } |
| 2598 | } |
| 2599 | |
| 2600 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2601 | void MacroAssembler::TestDoubleIsInt32(DwVfpRegister double_input, |
| 2602 | LowDwVfpRegister double_scratch) { |
| 2603 | DCHECK(!double_input.is(double_scratch)); |
| 2604 | vcvt_s32_f64(double_scratch.low(), double_input); |
| 2605 | vcvt_f64_s32(double_scratch, double_scratch.low()); |
| 2606 | VFPCompareAndSetFlags(double_input, double_scratch); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2607 | } |
| 2608 | |
| 2609 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2610 | void MacroAssembler::TryDoubleToInt32Exact(Register result, |
| 2611 | DwVfpRegister double_input, |
| 2612 | LowDwVfpRegister double_scratch) { |
| 2613 | DCHECK(!double_input.is(double_scratch)); |
| 2614 | vcvt_s32_f64(double_scratch.low(), double_input); |
| 2615 | vmov(result, double_scratch.low()); |
| 2616 | vcvt_f64_s32(double_scratch, double_scratch.low()); |
| 2617 | VFPCompareAndSetFlags(double_input, double_scratch); |
| 2618 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2619 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2620 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2621 | void MacroAssembler::TryInt32Floor(Register result, |
| 2622 | DwVfpRegister double_input, |
| 2623 | Register input_high, |
| 2624 | LowDwVfpRegister double_scratch, |
| 2625 | Label* done, |
| 2626 | Label* exact) { |
| 2627 | DCHECK(!result.is(input_high)); |
| 2628 | DCHECK(!double_input.is(double_scratch)); |
| 2629 | Label negative, exception; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2630 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2631 | VmovHigh(input_high, double_input); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2632 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2633 | // Test for NaN and infinities. |
| 2634 | Sbfx(result, input_high, |
| 2635 | HeapNumber::kExponentShift, HeapNumber::kExponentBits); |
| 2636 | cmp(result, Operand(-1)); |
| 2637 | b(eq, &exception); |
| 2638 | // Test for values that can be exactly represented as a |
| 2639 | // signed 32-bit integer. |
| 2640 | TryDoubleToInt32Exact(result, double_input, double_scratch); |
| 2641 | // If exact, return (result already fetched). |
| 2642 | b(eq, exact); |
| 2643 | cmp(input_high, Operand::Zero()); |
| 2644 | b(mi, &negative); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2645 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2646 | // Input is in ]+0, +inf[. |
| 2647 | // If result equals 0x7fffffff input was out of range or |
| 2648 | // in ]0x7fffffff, 0x80000000[. We ignore this last case which |
| 2649 | // could fits into an int32, that means we always think input was |
| 2650 | // out of range and always go to exception. |
| 2651 | // If result < 0x7fffffff, go to done, result fetched. |
| 2652 | cmn(result, Operand(1)); |
| 2653 | b(mi, &exception); |
| 2654 | b(done); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2655 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2656 | // Input is in ]-inf, -0[. |
| 2657 | // If x is a non integer negative number, |
| 2658 | // floor(x) <=> round_to_zero(x) - 1. |
| 2659 | bind(&negative); |
| 2660 | sub(result, result, Operand(1), SetCC); |
| 2661 | // If result is still negative, go to done, result fetched. |
| 2662 | // Else, we had an overflow and we fall through exception. |
| 2663 | b(mi, done); |
| 2664 | bind(&exception); |
| 2665 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2666 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2667 | void MacroAssembler::TryInlineTruncateDoubleToI(Register result, |
| 2668 | DwVfpRegister double_input, |
| 2669 | Label* done) { |
| 2670 | LowDwVfpRegister double_scratch = kScratchDoubleReg; |
| 2671 | vcvt_s32_f64(double_scratch.low(), double_input); |
| 2672 | vmov(result, double_scratch.low()); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2673 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2674 | // If result is not saturated (0x7fffffff or 0x80000000), we are done. |
| 2675 | sub(ip, result, Operand(1)); |
| 2676 | cmp(ip, Operand(0x7ffffffe)); |
| 2677 | b(lt, done); |
| 2678 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2679 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2680 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2681 | void MacroAssembler::TruncateDoubleToI(Register result, |
| 2682 | DwVfpRegister double_input) { |
| 2683 | Label done; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2684 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2685 | TryInlineTruncateDoubleToI(result, double_input, &done); |
| 2686 | |
| 2687 | // If we fell through then inline version didn't succeed - call stub instead. |
| 2688 | push(lr); |
| 2689 | sub(sp, sp, Operand(kDoubleSize)); // Put input on stack. |
| 2690 | vstr(double_input, MemOperand(sp, 0)); |
| 2691 | |
| 2692 | DoubleToIStub stub(isolate(), sp, result, 0, true, true); |
| 2693 | CallStub(&stub); |
| 2694 | |
| 2695 | add(sp, sp, Operand(kDoubleSize)); |
| 2696 | pop(lr); |
| 2697 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2698 | bind(&done); |
| 2699 | } |
| 2700 | |
| 2701 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2702 | void MacroAssembler::TruncateHeapNumberToI(Register result, |
| 2703 | Register object) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2704 | Label done; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2705 | LowDwVfpRegister double_scratch = kScratchDoubleReg; |
| 2706 | DCHECK(!result.is(object)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2707 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2708 | vldr(double_scratch, |
| 2709 | MemOperand(object, HeapNumber::kValueOffset - kHeapObjectTag)); |
| 2710 | TryInlineTruncateDoubleToI(result, double_scratch, &done); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2711 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2712 | // If we fell through then inline version didn't succeed - call stub instead. |
| 2713 | push(lr); |
| 2714 | DoubleToIStub stub(isolate(), |
| 2715 | object, |
| 2716 | result, |
| 2717 | HeapNumber::kValueOffset - kHeapObjectTag, |
| 2718 | true, |
| 2719 | true); |
| 2720 | CallStub(&stub); |
| 2721 | pop(lr); |
| 2722 | |
| 2723 | bind(&done); |
| 2724 | } |
| 2725 | |
| 2726 | |
| 2727 | void MacroAssembler::TruncateNumberToI(Register object, |
| 2728 | Register result, |
| 2729 | Register heap_number_map, |
| 2730 | Register scratch1, |
| 2731 | Label* not_number) { |
| 2732 | Label done; |
| 2733 | DCHECK(!result.is(object)); |
| 2734 | |
| 2735 | UntagAndJumpIfSmi(result, object, &done); |
| 2736 | JumpIfNotHeapNumber(object, heap_number_map, scratch1, not_number); |
| 2737 | TruncateHeapNumberToI(result, object); |
| 2738 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2739 | bind(&done); |
| 2740 | } |
| 2741 | |
| 2742 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2743 | void MacroAssembler::GetLeastBitsFromSmi(Register dst, |
| 2744 | Register src, |
| 2745 | int num_least_bits) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2746 | if (CpuFeatures::IsSupported(ARMv7) && !predictable_code_size()) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2747 | ubfx(dst, src, kSmiTagSize, num_least_bits); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2748 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2749 | SmiUntag(dst, src); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2750 | and_(dst, dst, Operand((1 << num_least_bits) - 1)); |
| 2751 | } |
| 2752 | } |
| 2753 | |
| 2754 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2755 | void MacroAssembler::GetLeastBitsFromInt32(Register dst, |
| 2756 | Register src, |
| 2757 | int num_least_bits) { |
| 2758 | and_(dst, src, Operand((1 << num_least_bits) - 1)); |
| 2759 | } |
| 2760 | |
| 2761 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2762 | void MacroAssembler::CallRuntime(const Runtime::Function* f, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2763 | int num_arguments, |
| 2764 | SaveFPRegsMode save_doubles) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2765 | // All parameters are on the stack. r0 has the return value after call. |
| 2766 | |
| 2767 | // If the expected number of arguments of the runtime function is |
| 2768 | // constant, we check that the actual number of arguments match the |
| 2769 | // expectation. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2770 | CHECK(f->nargs < 0 || f->nargs == num_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2771 | |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 2772 | // TODO(1236192): Most runtime routines don't need the number of |
| 2773 | // arguments passed in because it is constant. At some point we |
| 2774 | // should remove this need and make the runtime routine entry code |
| 2775 | // smarter. |
| 2776 | mov(r0, Operand(num_arguments)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2777 | mov(r1, Operand(ExternalReference(f, isolate()))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2778 | CEntryStub stub(isolate(), 1, save_doubles); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2779 | CallStub(&stub); |
| 2780 | } |
| 2781 | |
| 2782 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2783 | void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
| 2784 | int num_arguments) { |
| 2785 | mov(r0, Operand(num_arguments)); |
| 2786 | mov(r1, Operand(ext)); |
| 2787 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2788 | CEntryStub stub(isolate(), 1); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2789 | CallStub(&stub); |
| 2790 | } |
| 2791 | |
| 2792 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2793 | void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid) { |
| 2794 | const Runtime::Function* function = Runtime::FunctionForId(fid); |
| 2795 | DCHECK_EQ(1, function->result_size); |
| 2796 | if (function->nargs >= 0) { |
| 2797 | // TODO(1236192): Most runtime routines don't need the number of |
| 2798 | // arguments passed in because it is constant. At some point we |
| 2799 | // should remove this need and make the runtime routine entry code |
| 2800 | // smarter. |
| 2801 | mov(r0, Operand(function->nargs)); |
| 2802 | } |
| 2803 | JumpToExternalReference(ExternalReference(fid, isolate())); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2804 | } |
| 2805 | |
| 2806 | |
| 2807 | void MacroAssembler::JumpToExternalReference(const ExternalReference& builtin) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2808 | #if defined(__thumb__) |
| 2809 | // Thumb mode builtin. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2810 | DCHECK((reinterpret_cast<intptr_t>(builtin.address()) & 1) == 1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2811 | #endif |
| 2812 | mov(r1, Operand(builtin)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2813 | CEntryStub stub(isolate(), 1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2814 | Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 2815 | } |
| 2816 | |
| 2817 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2818 | void MacroAssembler::SetCounter(StatsCounter* counter, int value, |
| 2819 | Register scratch1, Register scratch2) { |
| 2820 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2821 | mov(scratch1, Operand(value)); |
| 2822 | mov(scratch2, Operand(ExternalReference(counter))); |
| 2823 | str(scratch1, MemOperand(scratch2)); |
| 2824 | } |
| 2825 | } |
| 2826 | |
| 2827 | |
| 2828 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value, |
| 2829 | Register scratch1, Register scratch2) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2830 | DCHECK(value > 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2831 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2832 | mov(scratch2, Operand(ExternalReference(counter))); |
| 2833 | ldr(scratch1, MemOperand(scratch2)); |
| 2834 | add(scratch1, scratch1, Operand(value)); |
| 2835 | str(scratch1, MemOperand(scratch2)); |
| 2836 | } |
| 2837 | } |
| 2838 | |
| 2839 | |
| 2840 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value, |
| 2841 | Register scratch1, Register scratch2) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2842 | DCHECK(value > 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2843 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2844 | mov(scratch2, Operand(ExternalReference(counter))); |
| 2845 | ldr(scratch1, MemOperand(scratch2)); |
| 2846 | sub(scratch1, scratch1, Operand(value)); |
| 2847 | str(scratch1, MemOperand(scratch2)); |
| 2848 | } |
| 2849 | } |
| 2850 | |
| 2851 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2852 | void MacroAssembler::Assert(Condition cond, BailoutReason reason) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2853 | if (emit_debug_code()) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2854 | Check(cond, reason); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 2855 | } |
| 2856 | |
| 2857 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2858 | void MacroAssembler::AssertFastElements(Register elements) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2859 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2860 | DCHECK(!elements.is(ip)); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2861 | Label ok; |
| 2862 | push(elements); |
| 2863 | ldr(elements, FieldMemOperand(elements, HeapObject::kMapOffset)); |
| 2864 | LoadRoot(ip, Heap::kFixedArrayMapRootIndex); |
| 2865 | cmp(elements, ip); |
| 2866 | b(eq, &ok); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2867 | LoadRoot(ip, Heap::kFixedDoubleArrayMapRootIndex); |
| 2868 | cmp(elements, ip); |
| 2869 | b(eq, &ok); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2870 | LoadRoot(ip, Heap::kFixedCOWArrayMapRootIndex); |
| 2871 | cmp(elements, ip); |
| 2872 | b(eq, &ok); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2873 | Abort(kJSObjectWithFastElementsMapHasSlowElements); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2874 | bind(&ok); |
| 2875 | pop(elements); |
| 2876 | } |
| 2877 | } |
| 2878 | |
| 2879 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2880 | void MacroAssembler::Check(Condition cond, BailoutReason reason) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2881 | Label L; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2882 | b(cond, &L); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2883 | Abort(reason); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2884 | // will not return here |
| 2885 | bind(&L); |
| 2886 | } |
| 2887 | |
| 2888 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2889 | void MacroAssembler::Abort(BailoutReason reason) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2890 | Label abort_start; |
| 2891 | bind(&abort_start); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2892 | #ifdef DEBUG |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2893 | const char* msg = GetBailoutReason(reason); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2894 | if (msg != NULL) { |
| 2895 | RecordComment("Abort message: "); |
| 2896 | RecordComment(msg); |
| 2897 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2898 | |
| 2899 | if (FLAG_trap_on_abort) { |
| 2900 | stop(msg); |
| 2901 | return; |
| 2902 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2903 | #endif |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2904 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2905 | mov(r0, Operand(Smi::FromInt(reason))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2906 | push(r0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2907 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2908 | // Disable stub call restrictions to always allow calls to abort. |
| 2909 | if (!has_frame_) { |
| 2910 | // We don't actually want to generate a pile of code for this, so just |
| 2911 | // claim there is a stack frame, without generating one. |
| 2912 | FrameScope scope(this, StackFrame::NONE); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2913 | CallRuntime(Runtime::kAbort); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2914 | } else { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2915 | CallRuntime(Runtime::kAbort); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2916 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2917 | // will not return here |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2918 | if (is_const_pool_blocked()) { |
| 2919 | // If the calling code cares about the exact number of |
| 2920 | // instructions generated, we insert padding here to keep the size |
| 2921 | // of the Abort macro constant. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2922 | static const int kExpectedAbortInstructions = 7; |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2923 | int abort_instructions = InstructionsGeneratedSince(&abort_start); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2924 | DCHECK(abort_instructions <= kExpectedAbortInstructions); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2925 | while (abort_instructions++ < kExpectedAbortInstructions) { |
| 2926 | nop(); |
| 2927 | } |
| 2928 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2929 | } |
| 2930 | |
| 2931 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2932 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 2933 | if (context_chain_length > 0) { |
| 2934 | // Move up the chain of contexts to the context containing the slot. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2935 | ldr(dst, MemOperand(cp, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2936 | for (int i = 1; i < context_chain_length; i++) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2937 | ldr(dst, MemOperand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2938 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2939 | } else { |
| 2940 | // Slot is in the current function context. Move it into the |
| 2941 | // destination register in case we store into it (the write barrier |
| 2942 | // cannot be allowed to destroy the context in esi). |
| 2943 | mov(dst, cp); |
| 2944 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2945 | } |
| 2946 | |
| 2947 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2948 | void MacroAssembler::LoadTransitionedArrayMapConditional( |
| 2949 | ElementsKind expected_kind, |
| 2950 | ElementsKind transitioned_kind, |
| 2951 | Register map_in_out, |
| 2952 | Register scratch, |
| 2953 | Label* no_map_match) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2954 | DCHECK(IsFastElementsKind(expected_kind)); |
| 2955 | DCHECK(IsFastElementsKind(transitioned_kind)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2956 | |
| 2957 | // 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] | 2958 | ldr(scratch, NativeContextMemOperand()); |
| 2959 | ldr(ip, ContextMemOperand(scratch, Context::ArrayMapIndex(expected_kind))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2960 | cmp(map_in_out, ip); |
| 2961 | b(ne, no_map_match); |
| 2962 | |
| 2963 | // Use the transitioned cached map. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2964 | ldr(map_in_out, |
| 2965 | ContextMemOperand(scratch, Context::ArrayMapIndex(transitioned_kind))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2966 | } |
| 2967 | |
| 2968 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2969 | void MacroAssembler::LoadNativeContextSlot(int index, Register dst) { |
| 2970 | ldr(dst, NativeContextMemOperand()); |
| 2971 | ldr(dst, ContextMemOperand(dst, index)); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2972 | } |
| 2973 | |
| 2974 | |
| 2975 | void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, |
| 2976 | Register map, |
| 2977 | Register scratch) { |
| 2978 | // Load the initial map. The global functions all have initial maps. |
| 2979 | ldr(map, FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2980 | if (emit_debug_code()) { |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2981 | Label ok, fail; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2982 | CheckMap(map, scratch, Heap::kMetaMapRootIndex, &fail, DO_SMI_CHECK); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2983 | b(&ok); |
| 2984 | bind(&fail); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2985 | Abort(kGlobalFunctionsMustHaveInitialMap); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2986 | bind(&ok); |
| 2987 | } |
| 2988 | } |
| 2989 | |
| 2990 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2991 | void MacroAssembler::JumpIfNotPowerOfTwoOrZero( |
| 2992 | Register reg, |
| 2993 | Register scratch, |
| 2994 | Label* not_power_of_two_or_zero) { |
| 2995 | sub(scratch, reg, Operand(1), SetCC); |
| 2996 | b(mi, not_power_of_two_or_zero); |
| 2997 | tst(scratch, reg); |
| 2998 | b(ne, not_power_of_two_or_zero); |
| 2999 | } |
| 3000 | |
| 3001 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3002 | void MacroAssembler::JumpIfNotPowerOfTwoOrZeroAndNeg( |
| 3003 | Register reg, |
| 3004 | Register scratch, |
| 3005 | Label* zero_and_neg, |
| 3006 | Label* not_power_of_two) { |
| 3007 | sub(scratch, reg, Operand(1), SetCC); |
| 3008 | b(mi, zero_and_neg); |
| 3009 | tst(scratch, reg); |
| 3010 | b(ne, not_power_of_two); |
| 3011 | } |
| 3012 | |
| 3013 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 3014 | void MacroAssembler::JumpIfNotBothSmi(Register reg1, |
| 3015 | Register reg2, |
| 3016 | Label* on_not_both_smi) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3017 | STATIC_ASSERT(kSmiTag == 0); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 3018 | tst(reg1, Operand(kSmiTagMask)); |
| 3019 | tst(reg2, Operand(kSmiTagMask), eq); |
| 3020 | b(ne, on_not_both_smi); |
| 3021 | } |
| 3022 | |
| 3023 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3024 | void MacroAssembler::UntagAndJumpIfSmi( |
| 3025 | Register dst, Register src, Label* smi_case) { |
| 3026 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3027 | SmiUntag(dst, src, SetCC); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3028 | b(cc, smi_case); // Shifter carry is not set for a smi. |
| 3029 | } |
| 3030 | |
| 3031 | |
| 3032 | void MacroAssembler::UntagAndJumpIfNotSmi( |
| 3033 | Register dst, Register src, Label* non_smi_case) { |
| 3034 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3035 | SmiUntag(dst, src, SetCC); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3036 | b(cs, non_smi_case); // Shifter carry is set for a non-smi. |
| 3037 | } |
| 3038 | |
| 3039 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 3040 | void MacroAssembler::JumpIfEitherSmi(Register reg1, |
| 3041 | Register reg2, |
| 3042 | Label* on_either_smi) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3043 | STATIC_ASSERT(kSmiTag == 0); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 3044 | tst(reg1, Operand(kSmiTagMask)); |
| 3045 | tst(reg2, Operand(kSmiTagMask), ne); |
| 3046 | b(eq, on_either_smi); |
| 3047 | } |
| 3048 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 3049 | void MacroAssembler::AssertNotNumber(Register object) { |
| 3050 | if (emit_debug_code()) { |
| 3051 | STATIC_ASSERT(kSmiTag == 0); |
| 3052 | tst(object, Operand(kSmiTagMask)); |
| 3053 | Check(ne, kOperandIsANumber); |
| 3054 | push(object); |
| 3055 | CompareObjectType(object, object, object, HEAP_NUMBER_TYPE); |
| 3056 | pop(object); |
| 3057 | Check(ne, kOperandIsANumber); |
| 3058 | } |
| 3059 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 3060 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3061 | void MacroAssembler::AssertNotSmi(Register object) { |
| 3062 | if (emit_debug_code()) { |
| 3063 | STATIC_ASSERT(kSmiTag == 0); |
| 3064 | tst(object, Operand(kSmiTagMask)); |
| 3065 | Check(ne, kOperandIsASmi); |
| 3066 | } |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 3067 | } |
| 3068 | |
| 3069 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3070 | void MacroAssembler::AssertSmi(Register object) { |
| 3071 | if (emit_debug_code()) { |
| 3072 | STATIC_ASSERT(kSmiTag == 0); |
| 3073 | tst(object, Operand(kSmiTagMask)); |
| 3074 | Check(eq, kOperandIsNotSmi); |
| 3075 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3076 | } |
| 3077 | |
| 3078 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3079 | void MacroAssembler::AssertString(Register object) { |
| 3080 | if (emit_debug_code()) { |
| 3081 | STATIC_ASSERT(kSmiTag == 0); |
| 3082 | tst(object, Operand(kSmiTagMask)); |
| 3083 | Check(ne, kOperandIsASmiAndNotAString); |
| 3084 | push(object); |
| 3085 | ldr(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 3086 | CompareInstanceType(object, object, FIRST_NONSTRING_TYPE); |
| 3087 | pop(object); |
| 3088 | Check(lo, kOperandIsNotAString); |
| 3089 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3090 | } |
| 3091 | |
| 3092 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3093 | void MacroAssembler::AssertName(Register object) { |
| 3094 | if (emit_debug_code()) { |
| 3095 | STATIC_ASSERT(kSmiTag == 0); |
| 3096 | tst(object, Operand(kSmiTagMask)); |
| 3097 | Check(ne, kOperandIsASmiAndNotAName); |
| 3098 | push(object); |
| 3099 | ldr(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 3100 | CompareInstanceType(object, object, LAST_NAME_TYPE); |
| 3101 | pop(object); |
| 3102 | Check(le, kOperandIsNotAName); |
| 3103 | } |
| 3104 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3105 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3106 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3107 | void MacroAssembler::AssertFunction(Register object) { |
| 3108 | if (emit_debug_code()) { |
| 3109 | STATIC_ASSERT(kSmiTag == 0); |
| 3110 | tst(object, Operand(kSmiTagMask)); |
| 3111 | Check(ne, kOperandIsASmiAndNotAFunction); |
| 3112 | push(object); |
| 3113 | CompareObjectType(object, object, object, JS_FUNCTION_TYPE); |
| 3114 | pop(object); |
| 3115 | Check(eq, kOperandIsNotAFunction); |
| 3116 | } |
| 3117 | } |
| 3118 | |
| 3119 | |
| 3120 | void MacroAssembler::AssertBoundFunction(Register object) { |
| 3121 | if (emit_debug_code()) { |
| 3122 | STATIC_ASSERT(kSmiTag == 0); |
| 3123 | tst(object, Operand(kSmiTagMask)); |
| 3124 | Check(ne, kOperandIsASmiAndNotABoundFunction); |
| 3125 | push(object); |
| 3126 | CompareObjectType(object, object, object, JS_BOUND_FUNCTION_TYPE); |
| 3127 | pop(object); |
| 3128 | Check(eq, kOperandIsNotABoundFunction); |
| 3129 | } |
| 3130 | } |
| 3131 | |
| 3132 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3133 | void MacroAssembler::AssertReceiver(Register object) { |
| 3134 | if (emit_debug_code()) { |
| 3135 | STATIC_ASSERT(kSmiTag == 0); |
| 3136 | tst(object, Operand(kSmiTagMask)); |
| 3137 | Check(ne, kOperandIsASmiAndNotAReceiver); |
| 3138 | push(object); |
| 3139 | STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
| 3140 | CompareObjectType(object, object, object, FIRST_JS_RECEIVER_TYPE); |
| 3141 | pop(object); |
| 3142 | Check(hs, kOperandIsNotAReceiver); |
| 3143 | } |
| 3144 | } |
| 3145 | |
| 3146 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3147 | void MacroAssembler::AssertUndefinedOrAllocationSite(Register object, |
| 3148 | Register scratch) { |
| 3149 | if (emit_debug_code()) { |
| 3150 | Label done_checking; |
| 3151 | AssertNotSmi(object); |
| 3152 | CompareRoot(object, Heap::kUndefinedValueRootIndex); |
| 3153 | b(eq, &done_checking); |
| 3154 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 3155 | CompareRoot(scratch, Heap::kAllocationSiteMapRootIndex); |
| 3156 | Assert(eq, kExpectedUndefinedOrCell); |
| 3157 | bind(&done_checking); |
| 3158 | } |
| 3159 | } |
| 3160 | |
| 3161 | |
| 3162 | void MacroAssembler::AssertIsRoot(Register reg, Heap::RootListIndex index) { |
| 3163 | if (emit_debug_code()) { |
| 3164 | CompareRoot(reg, index); |
| 3165 | Check(eq, kHeapNumberMapRegisterClobbered); |
| 3166 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3167 | } |
| 3168 | |
| 3169 | |
| 3170 | void MacroAssembler::JumpIfNotHeapNumber(Register object, |
| 3171 | Register heap_number_map, |
| 3172 | Register scratch, |
| 3173 | Label* on_not_heap_number) { |
| 3174 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3175 | AssertIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3176 | cmp(scratch, heap_number_map); |
| 3177 | b(ne, on_not_heap_number); |
| 3178 | } |
| 3179 | |
| 3180 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3181 | void MacroAssembler::JumpIfNonSmisNotBothSequentialOneByteStrings( |
| 3182 | Register first, Register second, Register scratch1, Register scratch2, |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3183 | Label* failure) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3184 | // Test that both first and second are sequential one-byte strings. |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3185 | // Assume that they are non-smis. |
| 3186 | ldr(scratch1, FieldMemOperand(first, HeapObject::kMapOffset)); |
| 3187 | ldr(scratch2, FieldMemOperand(second, HeapObject::kMapOffset)); |
| 3188 | ldrb(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); |
| 3189 | ldrb(scratch2, FieldMemOperand(scratch2, Map::kInstanceTypeOffset)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3190 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3191 | JumpIfBothInstanceTypesAreNotSequentialOneByte(scratch1, scratch2, scratch1, |
| 3192 | scratch2, failure); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3193 | } |
| 3194 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3195 | void MacroAssembler::JumpIfNotBothSequentialOneByteStrings(Register first, |
| 3196 | Register second, |
| 3197 | Register scratch1, |
| 3198 | Register scratch2, |
| 3199 | Label* failure) { |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3200 | // Check that neither is a smi. |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3201 | and_(scratch1, first, Operand(second)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 3202 | JumpIfSmi(scratch1, failure); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3203 | JumpIfNonSmisNotBothSequentialOneByteStrings(first, second, scratch1, |
| 3204 | scratch2, failure); |
| 3205 | } |
| 3206 | |
| 3207 | |
| 3208 | void MacroAssembler::JumpIfNotUniqueNameInstanceType(Register reg, |
| 3209 | Label* not_unique_name) { |
| 3210 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| 3211 | Label succeed; |
| 3212 | tst(reg, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| 3213 | b(eq, &succeed); |
| 3214 | cmp(reg, Operand(SYMBOL_TYPE)); |
| 3215 | b(ne, not_unique_name); |
| 3216 | |
| 3217 | bind(&succeed); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 3218 | } |
| 3219 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 3220 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3221 | // Allocates a heap number or jumps to the need_gc label if the young space |
| 3222 | // is full and a scavenge is needed. |
| 3223 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 3224 | Register scratch1, |
| 3225 | Register scratch2, |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 3226 | Register heap_number_map, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3227 | Label* gc_required, |
| 3228 | TaggingMode tagging_mode, |
| 3229 | MutableMode mode) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3230 | // Allocate an object in the heap for the heap number and tag it as a heap |
| 3231 | // object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3232 | Allocate(HeapNumber::kSize, result, scratch1, scratch2, gc_required, |
| 3233 | tagging_mode == TAG_RESULT ? TAG_OBJECT : NO_ALLOCATION_FLAGS); |
| 3234 | |
| 3235 | Heap::RootListIndex map_index = mode == MUTABLE |
| 3236 | ? Heap::kMutableHeapNumberMapRootIndex |
| 3237 | : Heap::kHeapNumberMapRootIndex; |
| 3238 | AssertIsRoot(heap_number_map, map_index); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3239 | |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 3240 | // Store heap number map in the allocated object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3241 | if (tagging_mode == TAG_RESULT) { |
| 3242 | str(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset)); |
| 3243 | } else { |
| 3244 | str(heap_number_map, MemOperand(result, HeapObject::kMapOffset)); |
| 3245 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3246 | } |
| 3247 | |
| 3248 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 3249 | void MacroAssembler::AllocateHeapNumberWithValue(Register result, |
| 3250 | DwVfpRegister value, |
| 3251 | Register scratch1, |
| 3252 | Register scratch2, |
| 3253 | Register heap_number_map, |
| 3254 | Label* gc_required) { |
| 3255 | AllocateHeapNumber(result, scratch1, scratch2, heap_number_map, gc_required); |
| 3256 | sub(scratch1, result, Operand(kHeapObjectTag)); |
| 3257 | vstr(value, scratch1, HeapNumber::kValueOffset); |
| 3258 | } |
| 3259 | |
| 3260 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3261 | void MacroAssembler::AllocateJSValue(Register result, Register constructor, |
| 3262 | Register value, Register scratch1, |
| 3263 | Register scratch2, Label* gc_required) { |
| 3264 | DCHECK(!result.is(constructor)); |
| 3265 | DCHECK(!result.is(scratch1)); |
| 3266 | DCHECK(!result.is(scratch2)); |
| 3267 | DCHECK(!result.is(value)); |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 3268 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3269 | // Allocate JSValue in new space. |
| 3270 | Allocate(JSValue::kSize, result, scratch1, scratch2, gc_required, TAG_OBJECT); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3271 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3272 | // Initialize the JSValue. |
| 3273 | LoadGlobalFunctionInitialMap(constructor, scratch1, scratch2); |
| 3274 | str(scratch1, FieldMemOperand(result, HeapObject::kMapOffset)); |
| 3275 | LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex); |
| 3276 | str(scratch1, FieldMemOperand(result, JSObject::kPropertiesOffset)); |
| 3277 | str(scratch1, FieldMemOperand(result, JSObject::kElementsOffset)); |
| 3278 | str(value, FieldMemOperand(result, JSValue::kValueOffset)); |
| 3279 | STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize); |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 3280 | } |
| 3281 | |
| 3282 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3283 | void MacroAssembler::CopyBytes(Register src, |
| 3284 | Register dst, |
| 3285 | Register length, |
| 3286 | Register scratch) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3287 | Label align_loop_1, word_loop, byte_loop, byte_loop_1, done; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3288 | |
| 3289 | // Align src before copying in word size chunks. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3290 | cmp(length, Operand(kPointerSize)); |
| 3291 | b(le, &byte_loop); |
| 3292 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3293 | bind(&align_loop_1); |
| 3294 | tst(src, Operand(kPointerSize - 1)); |
| 3295 | b(eq, &word_loop); |
| 3296 | ldrb(scratch, MemOperand(src, 1, PostIndex)); |
| 3297 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3298 | sub(length, length, Operand(1), SetCC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3299 | b(&align_loop_1); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3300 | // Copy bytes in word size chunks. |
| 3301 | bind(&word_loop); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3302 | if (emit_debug_code()) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3303 | tst(src, Operand(kPointerSize - 1)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3304 | Assert(eq, kExpectingAlignmentForCopyBytes); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3305 | } |
| 3306 | cmp(length, Operand(kPointerSize)); |
| 3307 | b(lt, &byte_loop); |
| 3308 | ldr(scratch, MemOperand(src, kPointerSize, PostIndex)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3309 | if (CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) { |
| 3310 | str(scratch, MemOperand(dst, kPointerSize, PostIndex)); |
| 3311 | } else { |
| 3312 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3313 | mov(scratch, Operand(scratch, LSR, 8)); |
| 3314 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3315 | mov(scratch, Operand(scratch, LSR, 8)); |
| 3316 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3317 | mov(scratch, Operand(scratch, LSR, 8)); |
| 3318 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3319 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3320 | sub(length, length, Operand(kPointerSize)); |
| 3321 | b(&word_loop); |
| 3322 | |
| 3323 | // Copy the last bytes if any left. |
| 3324 | bind(&byte_loop); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3325 | cmp(length, Operand::Zero()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3326 | b(eq, &done); |
| 3327 | bind(&byte_loop_1); |
| 3328 | ldrb(scratch, MemOperand(src, 1, PostIndex)); |
| 3329 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3330 | sub(length, length, Operand(1), SetCC); |
| 3331 | b(ne, &byte_loop_1); |
| 3332 | bind(&done); |
| 3333 | } |
| 3334 | |
| 3335 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3336 | void MacroAssembler::InitializeFieldsWithFiller(Register current_address, |
| 3337 | Register end_address, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3338 | Register filler) { |
| 3339 | Label loop, entry; |
| 3340 | b(&entry); |
| 3341 | bind(&loop); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3342 | str(filler, MemOperand(current_address, kPointerSize, PostIndex)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3343 | bind(&entry); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3344 | cmp(current_address, end_address); |
| 3345 | b(lo, &loop); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3346 | } |
| 3347 | |
| 3348 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3349 | void MacroAssembler::CheckFor32DRegs(Register scratch) { |
| 3350 | mov(scratch, Operand(ExternalReference::cpu_features())); |
| 3351 | ldr(scratch, MemOperand(scratch)); |
| 3352 | tst(scratch, Operand(1u << VFP32DREGS)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3353 | } |
| 3354 | |
| 3355 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3356 | void MacroAssembler::SaveFPRegs(Register location, Register scratch) { |
| 3357 | CheckFor32DRegs(scratch); |
| 3358 | vstm(db_w, location, d16, d31, ne); |
| 3359 | sub(location, location, Operand(16 * kDoubleSize), LeaveCC, eq); |
| 3360 | vstm(db_w, location, d0, d15); |
| 3361 | } |
| 3362 | |
| 3363 | |
| 3364 | void MacroAssembler::RestoreFPRegs(Register location, Register scratch) { |
| 3365 | CheckFor32DRegs(scratch); |
| 3366 | vldm(ia_w, location, d0, d15); |
| 3367 | vldm(ia_w, location, d16, d31, ne); |
| 3368 | add(location, location, Operand(16 * kDoubleSize), LeaveCC, eq); |
| 3369 | } |
| 3370 | |
| 3371 | |
| 3372 | void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialOneByte( |
| 3373 | Register first, Register second, Register scratch1, Register scratch2, |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3374 | Label* failure) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3375 | const int kFlatOneByteStringMask = |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3376 | kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3377 | const int kFlatOneByteStringTag = |
| 3378 | kStringTag | kOneByteStringTag | kSeqStringTag; |
| 3379 | and_(scratch1, first, Operand(kFlatOneByteStringMask)); |
| 3380 | and_(scratch2, second, Operand(kFlatOneByteStringMask)); |
| 3381 | cmp(scratch1, Operand(kFlatOneByteStringTag)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3382 | // Ignore second test if first test failed. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3383 | cmp(scratch2, Operand(kFlatOneByteStringTag), eq); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3384 | b(ne, failure); |
| 3385 | } |
| 3386 | |
| 3387 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3388 | void MacroAssembler::JumpIfInstanceTypeIsNotSequentialOneByte(Register type, |
| 3389 | Register scratch, |
| 3390 | Label* failure) { |
| 3391 | const int kFlatOneByteStringMask = |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3392 | kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3393 | const int kFlatOneByteStringTag = |
| 3394 | kStringTag | kOneByteStringTag | kSeqStringTag; |
| 3395 | and_(scratch, type, Operand(kFlatOneByteStringMask)); |
| 3396 | cmp(scratch, Operand(kFlatOneByteStringTag)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3397 | b(ne, failure); |
| 3398 | } |
| 3399 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3400 | static const int kRegisterPassedArguments = 4; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3401 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3402 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3403 | int MacroAssembler::CalculateStackPassedWords(int num_reg_arguments, |
| 3404 | int num_double_arguments) { |
| 3405 | int stack_passed_words = 0; |
| 3406 | if (use_eabi_hardfloat()) { |
| 3407 | // In the hard floating point calling convention, we can use |
| 3408 | // all double registers to pass doubles. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3409 | if (num_double_arguments > DoubleRegister::NumRegisters()) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3410 | stack_passed_words += |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3411 | 2 * (num_double_arguments - DoubleRegister::NumRegisters()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3412 | } |
| 3413 | } else { |
| 3414 | // In the soft floating point calling convention, every double |
| 3415 | // argument is passed using two registers. |
| 3416 | num_reg_arguments += 2 * num_double_arguments; |
| 3417 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3418 | // Up to four simple arguments are passed in registers r0..r3. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3419 | if (num_reg_arguments > kRegisterPassedArguments) { |
| 3420 | stack_passed_words += num_reg_arguments - kRegisterPassedArguments; |
| 3421 | } |
| 3422 | return stack_passed_words; |
| 3423 | } |
| 3424 | |
| 3425 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3426 | void MacroAssembler::EmitSeqStringSetCharCheck(Register string, |
| 3427 | Register index, |
| 3428 | Register value, |
| 3429 | uint32_t encoding_mask) { |
| 3430 | Label is_object; |
| 3431 | SmiTst(string); |
| 3432 | Check(ne, kNonObject); |
| 3433 | |
| 3434 | ldr(ip, FieldMemOperand(string, HeapObject::kMapOffset)); |
| 3435 | ldrb(ip, FieldMemOperand(ip, Map::kInstanceTypeOffset)); |
| 3436 | |
| 3437 | and_(ip, ip, Operand(kStringRepresentationMask | kStringEncodingMask)); |
| 3438 | cmp(ip, Operand(encoding_mask)); |
| 3439 | Check(eq, kUnexpectedStringType); |
| 3440 | |
| 3441 | // The index is assumed to be untagged coming in, tag it to compare with the |
| 3442 | // string length without using a temp register, it is restored at the end of |
| 3443 | // this function. |
| 3444 | Label index_tag_ok, index_tag_bad; |
| 3445 | TrySmiTag(index, index, &index_tag_bad); |
| 3446 | b(&index_tag_ok); |
| 3447 | bind(&index_tag_bad); |
| 3448 | Abort(kIndexIsTooLarge); |
| 3449 | bind(&index_tag_ok); |
| 3450 | |
| 3451 | ldr(ip, FieldMemOperand(string, String::kLengthOffset)); |
| 3452 | cmp(index, ip); |
| 3453 | Check(lt, kIndexIsTooLarge); |
| 3454 | |
| 3455 | cmp(index, Operand(Smi::FromInt(0))); |
| 3456 | Check(ge, kIndexIsNegative); |
| 3457 | |
| 3458 | SmiUntag(index, index); |
| 3459 | } |
| 3460 | |
| 3461 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3462 | void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| 3463 | int num_double_arguments, |
| 3464 | Register scratch) { |
| 3465 | int frame_alignment = ActivationFrameAlignment(); |
| 3466 | int stack_passed_arguments = CalculateStackPassedWords( |
| 3467 | num_reg_arguments, num_double_arguments); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3468 | if (frame_alignment > kPointerSize) { |
| 3469 | // Make stack end at alignment and make room for num_arguments - 4 words |
| 3470 | // and the original value of sp. |
| 3471 | mov(scratch, sp); |
| 3472 | sub(sp, sp, Operand((stack_passed_arguments + 1) * kPointerSize)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3473 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3474 | and_(sp, sp, Operand(-frame_alignment)); |
| 3475 | str(scratch, MemOperand(sp, stack_passed_arguments * kPointerSize)); |
| 3476 | } else { |
| 3477 | sub(sp, sp, Operand(stack_passed_arguments * kPointerSize)); |
| 3478 | } |
| 3479 | } |
| 3480 | |
| 3481 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3482 | void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| 3483 | Register scratch) { |
| 3484 | PrepareCallCFunction(num_reg_arguments, 0, scratch); |
| 3485 | } |
| 3486 | |
| 3487 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3488 | void MacroAssembler::MovToFloatParameter(DwVfpRegister src) { |
| 3489 | DCHECK(src.is(d0)); |
| 3490 | if (!use_eabi_hardfloat()) { |
| 3491 | vmov(r0, r1, src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3492 | } |
| 3493 | } |
| 3494 | |
| 3495 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3496 | // On ARM this is just a synonym to make the purpose clear. |
| 3497 | void MacroAssembler::MovToFloatResult(DwVfpRegister src) { |
| 3498 | MovToFloatParameter(src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3499 | } |
| 3500 | |
| 3501 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3502 | void MacroAssembler::MovToFloatParameters(DwVfpRegister src1, |
| 3503 | DwVfpRegister src2) { |
| 3504 | DCHECK(src1.is(d0)); |
| 3505 | DCHECK(src2.is(d1)); |
| 3506 | if (!use_eabi_hardfloat()) { |
| 3507 | vmov(r0, r1, src1); |
| 3508 | vmov(r2, r3, src2); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3509 | } |
| 3510 | } |
| 3511 | |
| 3512 | |
| 3513 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 3514 | int num_reg_arguments, |
| 3515 | int num_double_arguments) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3516 | mov(ip, Operand(function)); |
| 3517 | CallCFunctionHelper(ip, num_reg_arguments, num_double_arguments); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3518 | } |
| 3519 | |
| 3520 | |
| 3521 | void MacroAssembler::CallCFunction(Register function, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3522 | int num_reg_arguments, |
| 3523 | int num_double_arguments) { |
| 3524 | CallCFunctionHelper(function, num_reg_arguments, num_double_arguments); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3525 | } |
| 3526 | |
| 3527 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3528 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 3529 | int num_arguments) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3530 | CallCFunction(function, num_arguments, 0); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3531 | } |
| 3532 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3533 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3534 | void MacroAssembler::CallCFunction(Register function, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3535 | int num_arguments) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3536 | CallCFunction(function, num_arguments, 0); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3537 | } |
| 3538 | |
| 3539 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3540 | void MacroAssembler::CallCFunctionHelper(Register function, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3541 | int num_reg_arguments, |
| 3542 | int num_double_arguments) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3543 | DCHECK(has_frame()); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3544 | // Make sure that the stack is aligned before calling a C function unless |
| 3545 | // running in the simulator. The simulator has its own alignment check which |
| 3546 | // provides more information. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3547 | #if V8_HOST_ARCH_ARM |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3548 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3549 | int frame_alignment = base::OS::ActivationFrameAlignment(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3550 | int frame_alignment_mask = frame_alignment - 1; |
| 3551 | if (frame_alignment > kPointerSize) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3552 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3553 | Label alignment_as_expected; |
| 3554 | tst(sp, Operand(frame_alignment_mask)); |
| 3555 | b(eq, &alignment_as_expected); |
| 3556 | // Don't use Check here, as it will call Runtime_Abort possibly |
| 3557 | // re-entering here. |
| 3558 | stop("Unexpected alignment"); |
| 3559 | bind(&alignment_as_expected); |
| 3560 | } |
| 3561 | } |
| 3562 | #endif |
| 3563 | |
| 3564 | // Just call directly. The function called cannot cause a GC, or |
| 3565 | // allow preemption, so the return address in the link register |
| 3566 | // stays correct. |
| 3567 | Call(function); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3568 | int stack_passed_arguments = CalculateStackPassedWords( |
| 3569 | num_reg_arguments, num_double_arguments); |
| 3570 | if (ActivationFrameAlignment() > kPointerSize) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3571 | ldr(sp, MemOperand(sp, stack_passed_arguments * kPointerSize)); |
| 3572 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3573 | add(sp, sp, Operand(stack_passed_arguments * kPointerSize)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3574 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3575 | } |
| 3576 | |
| 3577 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3578 | void MacroAssembler::CheckPageFlag( |
| 3579 | Register object, |
| 3580 | Register scratch, |
| 3581 | int mask, |
| 3582 | Condition cc, |
| 3583 | Label* condition_met) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3584 | DCHECK(cc == eq || cc == ne); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3585 | Bfc(scratch, object, 0, kPageSizeBits); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3586 | ldr(scratch, MemOperand(scratch, MemoryChunk::kFlagsOffset)); |
| 3587 | tst(scratch, Operand(mask)); |
| 3588 | b(cc, condition_met); |
| 3589 | } |
| 3590 | |
| 3591 | |
| 3592 | void MacroAssembler::JumpIfBlack(Register object, |
| 3593 | Register scratch0, |
| 3594 | Register scratch1, |
| 3595 | Label* on_black) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3596 | HasColor(object, scratch0, scratch1, on_black, 1, 1); // kBlackBitPattern. |
| 3597 | DCHECK(strcmp(Marking::kBlackBitPattern, "11") == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3598 | } |
| 3599 | |
| 3600 | |
| 3601 | void MacroAssembler::HasColor(Register object, |
| 3602 | Register bitmap_scratch, |
| 3603 | Register mask_scratch, |
| 3604 | Label* has_color, |
| 3605 | int first_bit, |
| 3606 | int second_bit) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3607 | DCHECK(!AreAliased(object, bitmap_scratch, mask_scratch, no_reg)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3608 | |
| 3609 | GetMarkBits(object, bitmap_scratch, mask_scratch); |
| 3610 | |
| 3611 | Label other_color, word_boundary; |
| 3612 | ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 3613 | tst(ip, Operand(mask_scratch)); |
| 3614 | b(first_bit == 1 ? eq : ne, &other_color); |
| 3615 | // Shift left 1 by adding. |
| 3616 | add(mask_scratch, mask_scratch, Operand(mask_scratch), SetCC); |
| 3617 | b(eq, &word_boundary); |
| 3618 | tst(ip, Operand(mask_scratch)); |
| 3619 | b(second_bit == 1 ? ne : eq, has_color); |
| 3620 | jmp(&other_color); |
| 3621 | |
| 3622 | bind(&word_boundary); |
| 3623 | ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize + kPointerSize)); |
| 3624 | tst(ip, Operand(1)); |
| 3625 | b(second_bit == 1 ? ne : eq, has_color); |
| 3626 | bind(&other_color); |
| 3627 | } |
| 3628 | |
| 3629 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3630 | void MacroAssembler::GetMarkBits(Register addr_reg, |
| 3631 | Register bitmap_reg, |
| 3632 | Register mask_reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3633 | DCHECK(!AreAliased(addr_reg, bitmap_reg, mask_reg, no_reg)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3634 | and_(bitmap_reg, addr_reg, Operand(~Page::kPageAlignmentMask)); |
| 3635 | Ubfx(mask_reg, addr_reg, kPointerSizeLog2, Bitmap::kBitsPerCellLog2); |
| 3636 | const int kLowBits = kPointerSizeLog2 + Bitmap::kBitsPerCellLog2; |
| 3637 | Ubfx(ip, addr_reg, kLowBits, kPageSizeBits - kLowBits); |
| 3638 | add(bitmap_reg, bitmap_reg, Operand(ip, LSL, kPointerSizeLog2)); |
| 3639 | mov(ip, Operand(1)); |
| 3640 | mov(mask_reg, Operand(ip, LSL, mask_reg)); |
| 3641 | } |
| 3642 | |
| 3643 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3644 | void MacroAssembler::JumpIfWhite(Register value, Register bitmap_scratch, |
| 3645 | Register mask_scratch, Register load_scratch, |
| 3646 | Label* value_is_white) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3647 | DCHECK(!AreAliased(value, bitmap_scratch, mask_scratch, ip)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3648 | GetMarkBits(value, bitmap_scratch, mask_scratch); |
| 3649 | |
| 3650 | // 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] | 3651 | DCHECK(strcmp(Marking::kWhiteBitPattern, "00") == 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3652 | DCHECK(strcmp(Marking::kBlackBitPattern, "11") == 0); |
| 3653 | DCHECK(strcmp(Marking::kGreyBitPattern, "10") == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3654 | DCHECK(strcmp(Marking::kImpossibleBitPattern, "01") == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3655 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3656 | // Since both black and grey have a 1 in the first position and white does |
| 3657 | // not have a 1 there we only need to check one bit. |
| 3658 | ldr(load_scratch, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 3659 | tst(mask_scratch, load_scratch); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3660 | b(eq, value_is_white); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3661 | } |
| 3662 | |
| 3663 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3664 | void MacroAssembler::ClampUint8(Register output_reg, Register input_reg) { |
| 3665 | Usat(output_reg, 8, Operand(input_reg)); |
| 3666 | } |
| 3667 | |
| 3668 | |
| 3669 | void MacroAssembler::ClampDoubleToUint8(Register result_reg, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3670 | DwVfpRegister input_reg, |
| 3671 | LowDwVfpRegister double_scratch) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3672 | Label done; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3673 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3674 | // Handle inputs >= 255 (including +infinity). |
| 3675 | Vmov(double_scratch, 255.0, result_reg); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3676 | mov(result_reg, Operand(255)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3677 | VFPCompareAndSetFlags(input_reg, double_scratch); |
| 3678 | b(ge, &done); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3679 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3680 | // For inputs < 255 (including negative) vcvt_u32_f64 with round-to-nearest |
| 3681 | // rounding mode will provide the correct result. |
| 3682 | vcvt_u32_f64(double_scratch.low(), input_reg, kFPSCRRounding); |
| 3683 | vmov(result_reg, double_scratch.low()); |
| 3684 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3685 | bind(&done); |
| 3686 | } |
| 3687 | |
| 3688 | |
| 3689 | void MacroAssembler::LoadInstanceDescriptors(Register map, |
| 3690 | Register descriptors) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3691 | ldr(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset)); |
| 3692 | } |
| 3693 | |
| 3694 | |
| 3695 | void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { |
| 3696 | ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| 3697 | DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); |
| 3698 | } |
| 3699 | |
| 3700 | |
| 3701 | void MacroAssembler::EnumLength(Register dst, Register map) { |
| 3702 | STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); |
| 3703 | ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| 3704 | and_(dst, dst, Operand(Map::EnumLengthBits::kMask)); |
| 3705 | SmiTag(dst); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3706 | } |
| 3707 | |
| 3708 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3709 | void MacroAssembler::LoadAccessor(Register dst, Register holder, |
| 3710 | int accessor_index, |
| 3711 | AccessorComponent accessor) { |
| 3712 | ldr(dst, FieldMemOperand(holder, HeapObject::kMapOffset)); |
| 3713 | LoadInstanceDescriptors(dst, dst); |
| 3714 | ldr(dst, |
| 3715 | FieldMemOperand(dst, DescriptorArray::GetValueOffset(accessor_index))); |
| 3716 | int offset = accessor == ACCESSOR_GETTER ? AccessorPair::kGetterOffset |
| 3717 | : AccessorPair::kSetterOffset; |
| 3718 | ldr(dst, FieldMemOperand(dst, offset)); |
| 3719 | } |
| 3720 | |
| 3721 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3722 | void MacroAssembler::CheckEnumCache(Label* call_runtime) { |
| 3723 | Register null_value = r5; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3724 | Register empty_fixed_array_value = r6; |
| 3725 | LoadRoot(empty_fixed_array_value, Heap::kEmptyFixedArrayRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3726 | Label next, start; |
| 3727 | mov(r2, r0); |
| 3728 | |
| 3729 | // Check if the enum length field is properly initialized, indicating that |
| 3730 | // there is an enum cache. |
| 3731 | ldr(r1, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| 3732 | |
| 3733 | EnumLength(r3, r1); |
| 3734 | cmp(r3, Operand(Smi::FromInt(kInvalidEnumCacheSentinel))); |
| 3735 | b(eq, call_runtime); |
| 3736 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3737 | LoadRoot(null_value, Heap::kNullValueRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3738 | jmp(&start); |
| 3739 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3740 | bind(&next); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3741 | ldr(r1, FieldMemOperand(r2, HeapObject::kMapOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3742 | |
| 3743 | // For all objects but the receiver, check that the cache is empty. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3744 | EnumLength(r3, r1); |
| 3745 | cmp(r3, Operand(Smi::FromInt(0))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3746 | b(ne, call_runtime); |
| 3747 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3748 | bind(&start); |
| 3749 | |
| 3750 | // Check that there are no elements. Register r2 contains the current JS |
| 3751 | // object we've reached through the prototype chain. |
| 3752 | Label no_elements; |
| 3753 | ldr(r2, FieldMemOperand(r2, JSObject::kElementsOffset)); |
| 3754 | cmp(r2, empty_fixed_array_value); |
| 3755 | b(eq, &no_elements); |
| 3756 | |
| 3757 | // Second chance, the object may be using the empty slow element dictionary. |
| 3758 | CompareRoot(r2, Heap::kEmptySlowElementDictionaryRootIndex); |
| 3759 | b(ne, call_runtime); |
| 3760 | |
| 3761 | bind(&no_elements); |
| 3762 | ldr(r2, FieldMemOperand(r1, Map::kPrototypeOffset)); |
| 3763 | cmp(r2, null_value); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3764 | b(ne, &next); |
| 3765 | } |
| 3766 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3767 | void MacroAssembler::TestJSArrayForAllocationMemento( |
| 3768 | Register receiver_reg, |
| 3769 | Register scratch_reg, |
| 3770 | Label* no_memento_found) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 3771 | Label map_check; |
| 3772 | Label top_check; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3773 | ExternalReference new_space_allocation_top = |
| 3774 | ExternalReference::new_space_allocation_top_address(isolate()); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 3775 | const int kMementoMapOffset = JSArray::kSize - kHeapObjectTag; |
| 3776 | const int kMementoEndOffset = kMementoMapOffset + AllocationMemento::kSize; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3777 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 3778 | // Bail out if the object is not in new space. |
| 3779 | JumpIfNotInNewSpace(receiver_reg, scratch_reg, no_memento_found); |
| 3780 | // If the object is in new space, we need to check whether it is on the same |
| 3781 | // page as the current top. |
| 3782 | add(scratch_reg, receiver_reg, Operand(kMementoEndOffset)); |
| 3783 | eor(scratch_reg, scratch_reg, Operand(new_space_allocation_top)); |
| 3784 | tst(scratch_reg, Operand(~Page::kPageAlignmentMask)); |
| 3785 | b(eq, &top_check); |
| 3786 | // The object is on a different page than allocation top. Bail out if the |
| 3787 | // object sits on the page boundary as no memento can follow and we cannot |
| 3788 | // touch the memory following it. |
| 3789 | add(scratch_reg, receiver_reg, Operand(kMementoEndOffset)); |
| 3790 | eor(scratch_reg, scratch_reg, Operand(receiver_reg)); |
| 3791 | tst(scratch_reg, Operand(~Page::kPageAlignmentMask)); |
| 3792 | b(ne, no_memento_found); |
| 3793 | // Continue with the actual map check. |
| 3794 | jmp(&map_check); |
| 3795 | // If top is on the same page as the current object, we need to check whether |
| 3796 | // we are below top. |
| 3797 | bind(&top_check); |
| 3798 | add(scratch_reg, receiver_reg, Operand(kMementoEndOffset)); |
| 3799 | cmp(scratch_reg, Operand(new_space_allocation_top)); |
| 3800 | b(gt, no_memento_found); |
| 3801 | // Memento map check. |
| 3802 | bind(&map_check); |
| 3803 | ldr(scratch_reg, MemOperand(receiver_reg, kMementoMapOffset)); |
| 3804 | cmp(scratch_reg, Operand(isolate()->factory()->allocation_memento_map())); |
| 3805 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3806 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3807 | Register GetRegisterThatIsNotOneOf(Register reg1, |
| 3808 | Register reg2, |
| 3809 | Register reg3, |
| 3810 | Register reg4, |
| 3811 | Register reg5, |
| 3812 | Register reg6) { |
| 3813 | RegList regs = 0; |
| 3814 | if (reg1.is_valid()) regs |= reg1.bit(); |
| 3815 | if (reg2.is_valid()) regs |= reg2.bit(); |
| 3816 | if (reg3.is_valid()) regs |= reg3.bit(); |
| 3817 | if (reg4.is_valid()) regs |= reg4.bit(); |
| 3818 | if (reg5.is_valid()) regs |= reg5.bit(); |
| 3819 | if (reg6.is_valid()) regs |= reg6.bit(); |
| 3820 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3821 | const RegisterConfiguration* config = |
| 3822 | RegisterConfiguration::ArchDefault(RegisterConfiguration::CRANKSHAFT); |
| 3823 | for (int i = 0; i < config->num_allocatable_general_registers(); ++i) { |
| 3824 | int code = config->GetAllocatableGeneralCode(i); |
| 3825 | Register candidate = Register::from_code(code); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3826 | if (regs & candidate.bit()) continue; |
| 3827 | return candidate; |
| 3828 | } |
| 3829 | UNREACHABLE(); |
| 3830 | return no_reg; |
| 3831 | } |
| 3832 | |
| 3833 | |
| 3834 | void MacroAssembler::JumpIfDictionaryInPrototypeChain( |
| 3835 | Register object, |
| 3836 | Register scratch0, |
| 3837 | Register scratch1, |
| 3838 | Label* found) { |
| 3839 | DCHECK(!scratch1.is(scratch0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3840 | Register current = scratch0; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3841 | Label loop_again, end; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3842 | |
| 3843 | // scratch contained elements pointer. |
| 3844 | mov(current, object); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3845 | ldr(current, FieldMemOperand(current, HeapObject::kMapOffset)); |
| 3846 | ldr(current, FieldMemOperand(current, Map::kPrototypeOffset)); |
| 3847 | CompareRoot(current, Heap::kNullValueRootIndex); |
| 3848 | b(eq, &end); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3849 | |
| 3850 | // Loop based on the map going up the prototype chain. |
| 3851 | bind(&loop_again); |
| 3852 | ldr(current, FieldMemOperand(current, HeapObject::kMapOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3853 | |
| 3854 | STATIC_ASSERT(JS_PROXY_TYPE < JS_OBJECT_TYPE); |
| 3855 | STATIC_ASSERT(JS_VALUE_TYPE < JS_OBJECT_TYPE); |
| 3856 | ldrb(scratch1, FieldMemOperand(current, Map::kInstanceTypeOffset)); |
| 3857 | cmp(scratch1, Operand(JS_OBJECT_TYPE)); |
| 3858 | b(lo, found); |
| 3859 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3860 | ldr(scratch1, FieldMemOperand(current, Map::kBitField2Offset)); |
| 3861 | DecodeField<Map::ElementsKindBits>(scratch1); |
| 3862 | cmp(scratch1, Operand(DICTIONARY_ELEMENTS)); |
| 3863 | b(eq, found); |
| 3864 | ldr(current, FieldMemOperand(current, Map::kPrototypeOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3865 | CompareRoot(current, Heap::kNullValueRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3866 | b(ne, &loop_again); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3867 | |
| 3868 | bind(&end); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3869 | } |
| 3870 | |
| 3871 | |
| 3872 | #ifdef DEBUG |
| 3873 | bool AreAliased(Register reg1, |
| 3874 | Register reg2, |
| 3875 | Register reg3, |
| 3876 | Register reg4, |
| 3877 | Register reg5, |
| 3878 | Register reg6, |
| 3879 | Register reg7, |
| 3880 | Register reg8) { |
| 3881 | int n_of_valid_regs = reg1.is_valid() + reg2.is_valid() + |
| 3882 | reg3.is_valid() + reg4.is_valid() + reg5.is_valid() + reg6.is_valid() + |
| 3883 | reg7.is_valid() + reg8.is_valid(); |
| 3884 | |
| 3885 | RegList regs = 0; |
| 3886 | if (reg1.is_valid()) regs |= reg1.bit(); |
| 3887 | if (reg2.is_valid()) regs |= reg2.bit(); |
| 3888 | if (reg3.is_valid()) regs |= reg3.bit(); |
| 3889 | if (reg4.is_valid()) regs |= reg4.bit(); |
| 3890 | if (reg5.is_valid()) regs |= reg5.bit(); |
| 3891 | if (reg6.is_valid()) regs |= reg6.bit(); |
| 3892 | if (reg7.is_valid()) regs |= reg7.bit(); |
| 3893 | if (reg8.is_valid()) regs |= reg8.bit(); |
| 3894 | int n_of_non_aliasing_regs = NumRegs(regs); |
| 3895 | |
| 3896 | return n_of_valid_regs != n_of_non_aliasing_regs; |
| 3897 | } |
| 3898 | #endif |
| 3899 | |
| 3900 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3901 | CodePatcher::CodePatcher(Isolate* isolate, byte* address, int instructions, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3902 | FlushICache flush_cache) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3903 | : address_(address), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3904 | size_(instructions * Assembler::kInstrSize), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3905 | masm_(isolate, address, size_ + Assembler::kGap, CodeObjectRequired::kNo), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3906 | flush_cache_(flush_cache) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3907 | // Create a new macro assembler pointing to the address of the code to patch. |
| 3908 | // The size is adjusted with kGap on order for the assembler to generate size |
| 3909 | // bytes of instructions without failing with buffer size constraints. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3910 | DCHECK(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3911 | } |
| 3912 | |
| 3913 | |
| 3914 | CodePatcher::~CodePatcher() { |
| 3915 | // Indicate that code has changed. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3916 | if (flush_cache_ == FLUSH) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3917 | Assembler::FlushICache(masm_.isolate(), address_, size_); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3918 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3919 | |
| 3920 | // Check that the code was patched as expected. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3921 | DCHECK(masm_.pc_ == address_ + size_); |
| 3922 | DCHECK(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3923 | } |
| 3924 | |
| 3925 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3926 | void CodePatcher::Emit(Instr instr) { |
| 3927 | masm()->emit(instr); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3928 | } |
| 3929 | |
| 3930 | |
| 3931 | void CodePatcher::Emit(Address addr) { |
| 3932 | masm()->emit(reinterpret_cast<Instr>(addr)); |
| 3933 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3934 | |
| 3935 | |
| 3936 | void CodePatcher::EmitCondition(Condition cond) { |
| 3937 | Instr instr = Assembler::instr_at(masm_.pc_); |
| 3938 | instr = (instr & ~kCondMask) | cond; |
| 3939 | masm_.emit(instr); |
| 3940 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3941 | |
| 3942 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3943 | void MacroAssembler::TruncatingDiv(Register result, |
| 3944 | Register dividend, |
| 3945 | int32_t divisor) { |
| 3946 | DCHECK(!dividend.is(result)); |
| 3947 | DCHECK(!dividend.is(ip)); |
| 3948 | DCHECK(!result.is(ip)); |
| 3949 | base::MagicNumbersForDivision<uint32_t> mag = |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3950 | base::SignedDivisionByConstant(bit_cast<uint32_t>(divisor)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3951 | mov(ip, Operand(mag.multiplier)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3952 | bool neg = (mag.multiplier & (1U << 31)) != 0; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3953 | if (divisor > 0 && neg) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3954 | smmla(result, dividend, ip, dividend); |
| 3955 | } else { |
| 3956 | smmul(result, dividend, ip); |
| 3957 | if (divisor < 0 && !neg && mag.multiplier > 0) { |
| 3958 | sub(result, result, Operand(dividend)); |
| 3959 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3960 | } |
| 3961 | if (mag.shift > 0) mov(result, Operand(result, ASR, mag.shift)); |
| 3962 | add(result, result, Operand(dividend, LSR, 31)); |
| 3963 | } |
| 3964 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3965 | } // namespace internal |
| 3966 | } // namespace v8 |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 3967 | |
| 3968 | #endif // V8_TARGET_ARCH_ARM |