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. |
| 741 | tst(scratch, Operand(StoreBuffer::kStoreBufferOverflowBit)); |
| 742 | if (and_then == kFallThroughAtEnd) { |
| 743 | b(eq, &done); |
| 744 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 745 | DCHECK(and_then == kReturnAtEnd); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 746 | Ret(eq); |
| 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 | |
| 758 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 759 | void MacroAssembler::PushFixedFrame(Register marker_reg) { |
| 760 | DCHECK(!marker_reg.is_valid() || marker_reg.code() < cp.code()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 761 | stm(db_w, sp, (marker_reg.is_valid() ? marker_reg.bit() : 0) | cp.bit() | |
| 762 | (FLAG_enable_embedded_constant_pool ? pp.bit() : 0) | |
| 763 | fp.bit() | lr.bit()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | |
| 767 | void MacroAssembler::PopFixedFrame(Register marker_reg) { |
| 768 | DCHECK(!marker_reg.is_valid() || marker_reg.code() < cp.code()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 769 | ldm(ia_w, sp, (marker_reg.is_valid() ? marker_reg.bit() : 0) | cp.bit() | |
| 770 | (FLAG_enable_embedded_constant_pool ? pp.bit() : 0) | |
| 771 | fp.bit() | lr.bit()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 772 | } |
| 773 | |
| 774 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 775 | // Push and pop all registers that can hold pointers. |
| 776 | void MacroAssembler::PushSafepointRegisters() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 777 | // Safepoints expect a block of contiguous register values starting with r0. |
| 778 | // except when FLAG_enable_embedded_constant_pool, which omits pp. |
| 779 | DCHECK(kSafepointSavedRegisters == |
| 780 | (FLAG_enable_embedded_constant_pool |
| 781 | ? ((1 << (kNumSafepointSavedRegisters + 1)) - 1) & ~pp.bit() |
| 782 | : (1 << kNumSafepointSavedRegisters) - 1)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 783 | // Safepoints expect a block of kNumSafepointRegisters values on the |
| 784 | // stack, so adjust the stack for unsaved registers. |
| 785 | const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 786 | DCHECK(num_unsaved >= 0); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 787 | sub(sp, sp, Operand(num_unsaved * kPointerSize)); |
| 788 | stm(db_w, sp, kSafepointSavedRegisters); |
| 789 | } |
| 790 | |
| 791 | |
| 792 | void MacroAssembler::PopSafepointRegisters() { |
| 793 | const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters; |
| 794 | ldm(ia_w, sp, kSafepointSavedRegisters); |
| 795 | add(sp, sp, Operand(num_unsaved * kPointerSize)); |
| 796 | } |
| 797 | |
| 798 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 799 | void MacroAssembler::StoreToSafepointRegisterSlot(Register src, Register dst) { |
| 800 | str(src, SafepointRegisterSlot(dst)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 801 | } |
| 802 | |
| 803 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 804 | void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) { |
| 805 | ldr(dst, SafepointRegisterSlot(src)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 809 | int MacroAssembler::SafepointRegisterStackIndex(int reg_code) { |
| 810 | // The registers are pushed starting with the highest encoding, |
| 811 | // which means that lowest encodings are closest to the stack pointer. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 812 | if (FLAG_enable_embedded_constant_pool && reg_code > pp.code()) { |
| 813 | // RegList omits pp. |
| 814 | reg_code -= 1; |
| 815 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 816 | DCHECK(reg_code >= 0 && reg_code < kNumSafepointRegisters); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 817 | return reg_code; |
| 818 | } |
| 819 | |
| 820 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 821 | MemOperand MacroAssembler::SafepointRegisterSlot(Register reg) { |
| 822 | return MemOperand(sp, SafepointRegisterStackIndex(reg.code()) * kPointerSize); |
| 823 | } |
| 824 | |
| 825 | |
| 826 | MemOperand MacroAssembler::SafepointRegistersAndDoublesSlot(Register reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 827 | // Number of d-regs not known at snapshot time. |
| 828 | DCHECK(!serializer_enabled()); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 829 | // General purpose registers are pushed last on the stack. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 830 | const RegisterConfiguration* config = |
| 831 | RegisterConfiguration::ArchDefault(RegisterConfiguration::CRANKSHAFT); |
| 832 | int doubles_size = config->num_allocatable_double_registers() * kDoubleSize; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 833 | int register_offset = SafepointRegisterStackIndex(reg.code()) * kPointerSize; |
| 834 | return MemOperand(sp, doubles_size + register_offset); |
| 835 | } |
| 836 | |
| 837 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 838 | void MacroAssembler::Ldrd(Register dst1, Register dst2, |
| 839 | const MemOperand& src, Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 840 | DCHECK(src.rm().is(no_reg)); |
| 841 | DCHECK(!dst1.is(lr)); // r14. |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 842 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 843 | // V8 does not use this addressing mode, so the fallback code |
| 844 | // below doesn't support it yet. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 845 | DCHECK((src.am() != PreIndex) && (src.am() != NegPreIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 846 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 847 | // Generate two ldr instructions if ldrd is not available. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 848 | if (CpuFeatures::IsSupported(ARMv7) && !predictable_code_size() && |
| 849 | (dst1.code() % 2 == 0) && (dst1.code() + 1 == dst2.code())) { |
| 850 | CpuFeatureScope scope(this, ARMv7); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 851 | ldrd(dst1, dst2, src, cond); |
| 852 | } else { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 853 | if ((src.am() == Offset) || (src.am() == NegOffset)) { |
| 854 | MemOperand src2(src); |
| 855 | src2.set_offset(src2.offset() + 4); |
| 856 | if (dst1.is(src.rn())) { |
| 857 | ldr(dst2, src2, cond); |
| 858 | ldr(dst1, src, cond); |
| 859 | } else { |
| 860 | ldr(dst1, src, cond); |
| 861 | ldr(dst2, src2, cond); |
| 862 | } |
| 863 | } else { // PostIndex or NegPostIndex. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 864 | DCHECK((src.am() == PostIndex) || (src.am() == NegPostIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 865 | if (dst1.is(src.rn())) { |
| 866 | ldr(dst2, MemOperand(src.rn(), 4, Offset), cond); |
| 867 | ldr(dst1, src, cond); |
| 868 | } else { |
| 869 | MemOperand src2(src); |
| 870 | src2.set_offset(src2.offset() - 4); |
| 871 | ldr(dst1, MemOperand(src.rn(), 4, PostIndex), cond); |
| 872 | ldr(dst2, src2, cond); |
| 873 | } |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 874 | } |
| 875 | } |
| 876 | } |
| 877 | |
| 878 | |
| 879 | void MacroAssembler::Strd(Register src1, Register src2, |
| 880 | const MemOperand& dst, Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 881 | DCHECK(dst.rm().is(no_reg)); |
| 882 | DCHECK(!src1.is(lr)); // r14. |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 883 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 884 | // V8 does not use this addressing mode, so the fallback code |
| 885 | // below doesn't support it yet. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 886 | DCHECK((dst.am() != PreIndex) && (dst.am() != NegPreIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 887 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 888 | // Generate two str instructions if strd is not available. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 889 | if (CpuFeatures::IsSupported(ARMv7) && !predictable_code_size() && |
| 890 | (src1.code() % 2 == 0) && (src1.code() + 1 == src2.code())) { |
| 891 | CpuFeatureScope scope(this, ARMv7); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 892 | strd(src1, src2, dst, cond); |
| 893 | } else { |
| 894 | MemOperand dst2(dst); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 895 | if ((dst.am() == Offset) || (dst.am() == NegOffset)) { |
| 896 | dst2.set_offset(dst2.offset() + 4); |
| 897 | str(src1, dst, cond); |
| 898 | str(src2, dst2, cond); |
| 899 | } else { // PostIndex or NegPostIndex. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 900 | DCHECK((dst.am() == PostIndex) || (dst.am() == NegPostIndex)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 901 | dst2.set_offset(dst2.offset() - 4); |
| 902 | str(src1, MemOperand(dst.rn(), 4, PostIndex), cond); |
| 903 | str(src2, dst2, cond); |
| 904 | } |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 905 | } |
| 906 | } |
| 907 | |
| 908 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 909 | void MacroAssembler::VFPEnsureFPSCRState(Register scratch) { |
| 910 | // If needed, restore wanted bits of FPSCR. |
| 911 | Label fpscr_done; |
| 912 | vmrs(scratch); |
| 913 | if (emit_debug_code()) { |
| 914 | Label rounding_mode_correct; |
| 915 | tst(scratch, Operand(kVFPRoundingModeMask)); |
| 916 | b(eq, &rounding_mode_correct); |
| 917 | // Don't call Assert here, since Runtime_Abort could re-enter here. |
| 918 | stop("Default rounding mode not set"); |
| 919 | bind(&rounding_mode_correct); |
| 920 | } |
| 921 | tst(scratch, Operand(kVFPDefaultNaNModeControlBit)); |
| 922 | b(ne, &fpscr_done); |
| 923 | orr(scratch, scratch, Operand(kVFPDefaultNaNModeControlBit)); |
| 924 | vmsr(scratch); |
| 925 | bind(&fpscr_done); |
| 926 | } |
| 927 | |
| 928 | |
| 929 | void MacroAssembler::VFPCanonicalizeNaN(const DwVfpRegister dst, |
| 930 | const DwVfpRegister src, |
| 931 | const Condition cond) { |
| 932 | vsub(dst, src, kDoubleRegZero, cond); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 933 | } |
| 934 | |
| 935 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 936 | void MacroAssembler::VFPCompareAndSetFlags(const SwVfpRegister src1, |
| 937 | const SwVfpRegister src2, |
| 938 | const Condition cond) { |
| 939 | // Compare and move FPSCR flags to the normal condition flags. |
| 940 | VFPCompareAndLoadFlags(src1, src2, pc, cond); |
| 941 | } |
| 942 | |
| 943 | void MacroAssembler::VFPCompareAndSetFlags(const SwVfpRegister src1, |
| 944 | const float src2, |
| 945 | const Condition cond) { |
| 946 | // Compare and move FPSCR flags to the normal condition flags. |
| 947 | VFPCompareAndLoadFlags(src1, src2, pc, cond); |
| 948 | } |
| 949 | |
| 950 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 951 | void MacroAssembler::VFPCompareAndSetFlags(const DwVfpRegister src1, |
| 952 | const DwVfpRegister src2, |
| 953 | const Condition cond) { |
| 954 | // Compare and move FPSCR flags to the normal condition flags. |
| 955 | VFPCompareAndLoadFlags(src1, src2, pc, cond); |
| 956 | } |
| 957 | |
| 958 | void MacroAssembler::VFPCompareAndSetFlags(const DwVfpRegister src1, |
| 959 | const double src2, |
| 960 | const Condition cond) { |
| 961 | // Compare and move FPSCR flags to the normal condition flags. |
| 962 | VFPCompareAndLoadFlags(src1, src2, pc, cond); |
| 963 | } |
| 964 | |
| 965 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 966 | void MacroAssembler::VFPCompareAndLoadFlags(const SwVfpRegister src1, |
| 967 | const SwVfpRegister src2, |
| 968 | const Register fpscr_flags, |
| 969 | const Condition cond) { |
| 970 | // Compare and load FPSCR. |
| 971 | vcmp(src1, src2, cond); |
| 972 | vmrs(fpscr_flags, cond); |
| 973 | } |
| 974 | |
| 975 | void MacroAssembler::VFPCompareAndLoadFlags(const SwVfpRegister src1, |
| 976 | const float src2, |
| 977 | const Register fpscr_flags, |
| 978 | const Condition cond) { |
| 979 | // Compare and load FPSCR. |
| 980 | vcmp(src1, src2, cond); |
| 981 | vmrs(fpscr_flags, cond); |
| 982 | } |
| 983 | |
| 984 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 985 | void MacroAssembler::VFPCompareAndLoadFlags(const DwVfpRegister src1, |
| 986 | const DwVfpRegister src2, |
| 987 | const Register fpscr_flags, |
| 988 | const Condition cond) { |
| 989 | // Compare and load FPSCR. |
| 990 | vcmp(src1, src2, cond); |
| 991 | vmrs(fpscr_flags, cond); |
| 992 | } |
| 993 | |
| 994 | void MacroAssembler::VFPCompareAndLoadFlags(const DwVfpRegister src1, |
| 995 | const double src2, |
| 996 | const Register fpscr_flags, |
| 997 | const Condition cond) { |
| 998 | // Compare and load FPSCR. |
| 999 | vcmp(src1, src2, cond); |
| 1000 | vmrs(fpscr_flags, cond); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 1001 | } |
| 1002 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1003 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1004 | void MacroAssembler::Vmov(const DwVfpRegister dst, |
| 1005 | const double imm, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1006 | const Register scratch) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1007 | static const DoubleRepresentation minus_zero(-0.0); |
| 1008 | static const DoubleRepresentation zero(0.0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1009 | DoubleRepresentation value_rep(imm); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1010 | // Handle special values first. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1011 | if (value_rep == zero) { |
| 1012 | vmov(dst, kDoubleRegZero); |
| 1013 | } else if (value_rep == minus_zero) { |
| 1014 | vneg(dst, kDoubleRegZero); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1015 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1016 | vmov(dst, imm, scratch); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1017 | } |
| 1018 | } |
| 1019 | |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 1020 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1021 | void MacroAssembler::VmovHigh(Register dst, DwVfpRegister src) { |
| 1022 | if (src.code() < 16) { |
| 1023 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(src.code()); |
| 1024 | vmov(dst, loc.high()); |
| 1025 | } else { |
| 1026 | vmov(dst, VmovIndexHi, src); |
| 1027 | } |
| 1028 | } |
| 1029 | |
| 1030 | |
| 1031 | void MacroAssembler::VmovHigh(DwVfpRegister dst, Register src) { |
| 1032 | if (dst.code() < 16) { |
| 1033 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(dst.code()); |
| 1034 | vmov(loc.high(), src); |
| 1035 | } else { |
| 1036 | vmov(dst, VmovIndexHi, src); |
| 1037 | } |
| 1038 | } |
| 1039 | |
| 1040 | |
| 1041 | void MacroAssembler::VmovLow(Register dst, DwVfpRegister src) { |
| 1042 | if (src.code() < 16) { |
| 1043 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(src.code()); |
| 1044 | vmov(dst, loc.low()); |
| 1045 | } else { |
| 1046 | vmov(dst, VmovIndexLo, src); |
| 1047 | } |
| 1048 | } |
| 1049 | |
| 1050 | |
| 1051 | void MacroAssembler::VmovLow(DwVfpRegister dst, Register src) { |
| 1052 | if (dst.code() < 16) { |
| 1053 | const LowDwVfpRegister loc = LowDwVfpRegister::from_code(dst.code()); |
| 1054 | vmov(loc.low(), src); |
| 1055 | } else { |
| 1056 | vmov(dst, VmovIndexLo, src); |
| 1057 | } |
| 1058 | } |
| 1059 | |
| 1060 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1061 | void MacroAssembler::LoadConstantPoolPointerRegisterFromCodeTargetAddress( |
| 1062 | Register code_target_address) { |
| 1063 | DCHECK(FLAG_enable_embedded_constant_pool); |
| 1064 | ldr(pp, MemOperand(code_target_address, |
| 1065 | Code::kConstantPoolOffset - Code::kHeaderSize)); |
| 1066 | add(pp, pp, code_target_address); |
| 1067 | } |
| 1068 | |
| 1069 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1070 | void MacroAssembler::LoadConstantPoolPointerRegister() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1071 | DCHECK(FLAG_enable_embedded_constant_pool); |
| 1072 | int entry_offset = pc_offset() + Instruction::kPCReadOffset; |
| 1073 | sub(ip, pc, Operand(entry_offset)); |
| 1074 | LoadConstantPoolPointerRegisterFromCodeTargetAddress(ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1075 | } |
| 1076 | |
| 1077 | |
| 1078 | void MacroAssembler::StubPrologue() { |
| 1079 | PushFixedFrame(); |
| 1080 | Push(Smi::FromInt(StackFrame::STUB)); |
| 1081 | // Adjust FP to point to saved FP. |
| 1082 | add(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1083 | if (FLAG_enable_embedded_constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1084 | LoadConstantPoolPointerRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1085 | set_constant_pool_available(true); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1086 | } |
| 1087 | } |
| 1088 | |
| 1089 | |
| 1090 | void MacroAssembler::Prologue(bool code_pre_aging) { |
| 1091 | { PredictableCodeSizeScope predictible_code_size_scope( |
| 1092 | this, kNoCodeAgeSequenceLength); |
| 1093 | // The following three instructions must remain together and unmodified |
| 1094 | // for code aging to work properly. |
| 1095 | if (code_pre_aging) { |
| 1096 | // Pre-age the code. |
| 1097 | Code* stub = Code::GetPreAgedCodeAgeStub(isolate()); |
| 1098 | add(r0, pc, Operand(-8)); |
| 1099 | ldr(pc, MemOperand(pc, -4)); |
| 1100 | emit_code_stub_address(stub); |
| 1101 | } else { |
| 1102 | PushFixedFrame(r1); |
| 1103 | nop(ip.code()); |
| 1104 | // Adjust FP to point to saved FP. |
| 1105 | add(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| 1106 | } |
| 1107 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1108 | if (FLAG_enable_embedded_constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1109 | LoadConstantPoolPointerRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1110 | set_constant_pool_available(true); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1111 | } |
| 1112 | } |
| 1113 | |
| 1114 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1115 | void MacroAssembler::EmitLoadTypeFeedbackVector(Register vector) { |
| 1116 | ldr(vector, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| 1117 | ldr(vector, FieldMemOperand(vector, JSFunction::kSharedFunctionInfoOffset)); |
| 1118 | ldr(vector, |
| 1119 | FieldMemOperand(vector, SharedFunctionInfo::kFeedbackVectorOffset)); |
| 1120 | } |
| 1121 | |
| 1122 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1123 | void MacroAssembler::EnterFrame(StackFrame::Type type, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1124 | bool load_constant_pool_pointer_reg) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1125 | // r0-r3: preserved |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1126 | PushFixedFrame(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1127 | if (FLAG_enable_embedded_constant_pool && load_constant_pool_pointer_reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1128 | LoadConstantPoolPointerRegister(); |
| 1129 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1130 | mov(ip, Operand(Smi::FromInt(type))); |
| 1131 | push(ip); |
| 1132 | mov(ip, Operand(CodeObject())); |
| 1133 | push(ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1134 | // Adjust FP to point to saved FP. |
| 1135 | add(fp, sp, |
| 1136 | Operand(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1137 | } |
| 1138 | |
| 1139 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1140 | int MacroAssembler::LeaveFrame(StackFrame::Type type) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1141 | // r0: preserved |
| 1142 | // r1: preserved |
| 1143 | // r2: preserved |
| 1144 | |
| 1145 | // Drop the execution stack down to the frame pointer and restore |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1146 | // the caller frame pointer, return address and constant pool pointer |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1147 | // (if FLAG_enable_embedded_constant_pool). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1148 | int frame_ends; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1149 | if (FLAG_enable_embedded_constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1150 | add(sp, fp, Operand(StandardFrameConstants::kConstantPoolOffset)); |
| 1151 | frame_ends = pc_offset(); |
| 1152 | ldm(ia_w, sp, pp.bit() | fp.bit() | lr.bit()); |
| 1153 | } else { |
| 1154 | mov(sp, fp); |
| 1155 | frame_ends = pc_offset(); |
| 1156 | ldm(ia_w, sp, fp.bit() | lr.bit()); |
| 1157 | } |
| 1158 | return frame_ends; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1159 | } |
| 1160 | |
| 1161 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1162 | void MacroAssembler::EnterExitFrame(bool save_doubles, int stack_space) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1163 | // Set up the frame structure on the stack. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1164 | DCHECK_EQ(2 * kPointerSize, ExitFrameConstants::kCallerSPDisplacement); |
| 1165 | DCHECK_EQ(1 * kPointerSize, ExitFrameConstants::kCallerPCOffset); |
| 1166 | DCHECK_EQ(0 * kPointerSize, ExitFrameConstants::kCallerFPOffset); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1167 | Push(lr, fp); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1168 | mov(fp, Operand(sp)); // Set up new frame pointer. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1169 | // Reserve room for saved entry sp and code object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1170 | sub(sp, sp, Operand(ExitFrameConstants::kFrameSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1171 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1172 | mov(ip, Operand::Zero()); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1173 | str(ip, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
| 1174 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1175 | if (FLAG_enable_embedded_constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1176 | str(pp, MemOperand(fp, ExitFrameConstants::kConstantPoolOffset)); |
| 1177 | } |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1178 | mov(ip, Operand(CodeObject())); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1179 | str(ip, MemOperand(fp, ExitFrameConstants::kCodeOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1180 | |
| 1181 | // Save the frame pointer and the context in top. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1182 | mov(ip, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1183 | str(fp, MemOperand(ip)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1184 | mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1185 | str(cp, MemOperand(ip)); |
| 1186 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1187 | // Optionally save all double registers. |
| 1188 | if (save_doubles) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1189 | SaveFPRegs(sp, ip); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1190 | // Note that d0 will be accessible at |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1191 | // fp - ExitFrameConstants::kFrameSize - |
| 1192 | // DwVfpRegister::kMaxNumRegisters * kDoubleSize, |
| 1193 | // since the sp slot, code slot and constant pool slot (if |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1194 | // FLAG_enable_embedded_constant_pool) were pushed after the fp. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1195 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1196 | |
| 1197 | // Reserve place for the return address and stack space and align the frame |
| 1198 | // preparing for calling the runtime function. |
| 1199 | const int frame_alignment = MacroAssembler::ActivationFrameAlignment(); |
| 1200 | sub(sp, sp, Operand((stack_space + 1) * kPointerSize)); |
| 1201 | if (frame_alignment > 0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1202 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1203 | and_(sp, sp, Operand(-frame_alignment)); |
| 1204 | } |
| 1205 | |
| 1206 | // Set the exit frame sp value to point just before the return address |
| 1207 | // location. |
| 1208 | add(ip, sp, Operand(kPointerSize)); |
| 1209 | str(ip, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1210 | } |
| 1211 | |
| 1212 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1213 | void MacroAssembler::InitializeNewString(Register string, |
| 1214 | Register length, |
| 1215 | Heap::RootListIndex map_index, |
| 1216 | Register scratch1, |
| 1217 | Register scratch2) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1218 | SmiTag(scratch1, length); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1219 | LoadRoot(scratch2, map_index); |
| 1220 | str(scratch1, FieldMemOperand(string, String::kLengthOffset)); |
| 1221 | mov(scratch1, Operand(String::kEmptyHashField)); |
| 1222 | str(scratch2, FieldMemOperand(string, HeapObject::kMapOffset)); |
| 1223 | str(scratch1, FieldMemOperand(string, String::kHashFieldOffset)); |
| 1224 | } |
| 1225 | |
| 1226 | |
| 1227 | int MacroAssembler::ActivationFrameAlignment() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1228 | #if V8_HOST_ARCH_ARM |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1229 | // Running on the real platform. Use the alignment as mandated by the local |
| 1230 | // environment. |
| 1231 | // Note: This will break if we ever start generating snapshots on one ARM |
| 1232 | // platform for another ARM platform with a different alignment. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1233 | return base::OS::ActivationFrameAlignment(); |
| 1234 | #else // V8_HOST_ARCH_ARM |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1235 | // If we are using the simulator then we should always align to the expected |
| 1236 | // 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] | 1237 | // if the target platform will need alignment, so this is controlled from a |
| 1238 | // flag. |
| 1239 | return FLAG_sim_stack_alignment; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1240 | #endif // V8_HOST_ARCH_ARM |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1241 | } |
| 1242 | |
| 1243 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1244 | void MacroAssembler::LeaveExitFrame(bool save_doubles, Register argument_count, |
| 1245 | bool restore_context, |
| 1246 | bool argument_count_is_length) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1247 | ConstantPoolUnavailableScope constant_pool_unavailable(this); |
| 1248 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1249 | // Optionally restore all double registers. |
| 1250 | if (save_doubles) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1251 | // Calculate the stack location of the saved doubles and restore them. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1252 | const int offset = ExitFrameConstants::kFrameSize; |
| 1253 | sub(r3, fp, |
| 1254 | Operand(offset + DwVfpRegister::kMaxNumRegisters * kDoubleSize)); |
| 1255 | RestoreFPRegs(r3, ip); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1256 | } |
| 1257 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1258 | // Clear top frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1259 | mov(r3, Operand::Zero()); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1260 | mov(ip, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1261 | str(r3, MemOperand(ip)); |
| 1262 | |
| 1263 | // Restore current context from top and clear it in debug mode. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1264 | if (restore_context) { |
| 1265 | mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
| 1266 | ldr(cp, MemOperand(ip)); |
| 1267 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1268 | #ifdef DEBUG |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1269 | mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1270 | str(r3, MemOperand(ip)); |
| 1271 | #endif |
| 1272 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1273 | // Tear down the exit frame, pop the arguments, and return. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1274 | if (FLAG_enable_embedded_constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1275 | ldr(pp, MemOperand(fp, ExitFrameConstants::kConstantPoolOffset)); |
| 1276 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1277 | mov(sp, Operand(fp)); |
| 1278 | ldm(ia_w, sp, fp.bit() | lr.bit()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1279 | if (argument_count.is_valid()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1280 | if (argument_count_is_length) { |
| 1281 | add(sp, sp, argument_count); |
| 1282 | } else { |
| 1283 | add(sp, sp, Operand(argument_count, LSL, kPointerSizeLog2)); |
| 1284 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1285 | } |
| 1286 | } |
| 1287 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1288 | |
| 1289 | void MacroAssembler::MovFromFloatResult(const DwVfpRegister dst) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1290 | if (use_eabi_hardfloat()) { |
| 1291 | Move(dst, d0); |
| 1292 | } else { |
| 1293 | vmov(dst, r0, r1); |
| 1294 | } |
| 1295 | } |
| 1296 | |
| 1297 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1298 | // On ARM this is just a synonym to make the purpose clear. |
| 1299 | void MacroAssembler::MovFromFloatParameter(DwVfpRegister dst) { |
| 1300 | MovFromFloatResult(dst); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1301 | } |
| 1302 | |
| 1303 | |
| 1304 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 1305 | const ParameterCount& actual, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1306 | Label* done, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1307 | bool* definitely_mismatches, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1308 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1309 | const CallWrapper& call_wrapper) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1310 | bool definitely_matches = false; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1311 | *definitely_mismatches = false; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1312 | Label regular_invoke; |
| 1313 | |
| 1314 | // Check whether the expected and actual arguments count match. If not, |
| 1315 | // setup registers according to contract with ArgumentsAdaptorTrampoline: |
| 1316 | // r0: actual arguments count |
| 1317 | // r1: function (passed through to callee) |
| 1318 | // r2: expected arguments count |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1319 | |
| 1320 | // The code below is made a lot easier because the calling code already sets |
| 1321 | // up actual and expected registers according to the contract if values are |
| 1322 | // passed in registers. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1323 | DCHECK(actual.is_immediate() || actual.reg().is(r0)); |
| 1324 | DCHECK(expected.is_immediate() || expected.reg().is(r2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1325 | |
| 1326 | if (expected.is_immediate()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1327 | DCHECK(actual.is_immediate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1328 | mov(r0, Operand(actual.immediate())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1329 | if (expected.immediate() == actual.immediate()) { |
| 1330 | definitely_matches = true; |
| 1331 | } else { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1332 | const int sentinel = SharedFunctionInfo::kDontAdaptArgumentsSentinel; |
| 1333 | if (expected.immediate() == sentinel) { |
| 1334 | // Don't worry about adapting arguments for builtins that |
| 1335 | // don't want that done. Skip adaption code by making it look |
| 1336 | // like we have a match between expected and actual number of |
| 1337 | // arguments. |
| 1338 | definitely_matches = true; |
| 1339 | } else { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1340 | *definitely_mismatches = true; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1341 | mov(r2, Operand(expected.immediate())); |
| 1342 | } |
| 1343 | } |
| 1344 | } else { |
| 1345 | if (actual.is_immediate()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1346 | mov(r0, Operand(actual.immediate())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1347 | cmp(expected.reg(), Operand(actual.immediate())); |
| 1348 | b(eq, ®ular_invoke); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1349 | } else { |
| 1350 | cmp(expected.reg(), Operand(actual.reg())); |
| 1351 | b(eq, ®ular_invoke); |
| 1352 | } |
| 1353 | } |
| 1354 | |
| 1355 | if (!definitely_matches) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1356 | Handle<Code> adaptor = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1357 | isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1358 | if (flag == CALL_FUNCTION) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1359 | call_wrapper.BeforeCall(CallSize(adaptor)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1360 | Call(adaptor); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1361 | call_wrapper.AfterCall(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1362 | if (!*definitely_mismatches) { |
| 1363 | b(done); |
| 1364 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1365 | } else { |
| 1366 | Jump(adaptor, RelocInfo::CODE_TARGET); |
| 1367 | } |
| 1368 | bind(®ular_invoke); |
| 1369 | } |
| 1370 | } |
| 1371 | |
| 1372 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1373 | void MacroAssembler::FloodFunctionIfStepping(Register fun, Register new_target, |
| 1374 | const ParameterCount& expected, |
| 1375 | const ParameterCount& actual) { |
| 1376 | Label skip_flooding; |
| 1377 | ExternalReference step_in_enabled = |
| 1378 | ExternalReference::debug_step_in_enabled_address(isolate()); |
| 1379 | mov(r4, Operand(step_in_enabled)); |
| 1380 | ldrb(r4, MemOperand(r4)); |
| 1381 | cmp(r4, Operand(0)); |
| 1382 | b(eq, &skip_flooding); |
| 1383 | { |
| 1384 | FrameScope frame(this, |
| 1385 | has_frame() ? StackFrame::NONE : StackFrame::INTERNAL); |
| 1386 | if (expected.is_reg()) { |
| 1387 | SmiTag(expected.reg()); |
| 1388 | Push(expected.reg()); |
| 1389 | } |
| 1390 | if (actual.is_reg()) { |
| 1391 | SmiTag(actual.reg()); |
| 1392 | Push(actual.reg()); |
| 1393 | } |
| 1394 | if (new_target.is_valid()) { |
| 1395 | Push(new_target); |
| 1396 | } |
| 1397 | Push(fun); |
| 1398 | Push(fun); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 1399 | CallRuntime(Runtime::kDebugPrepareStepInIfStepping); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1400 | Pop(fun); |
| 1401 | if (new_target.is_valid()) { |
| 1402 | Pop(new_target); |
| 1403 | } |
| 1404 | if (actual.is_reg()) { |
| 1405 | Pop(actual.reg()); |
| 1406 | SmiUntag(actual.reg()); |
| 1407 | } |
| 1408 | if (expected.is_reg()) { |
| 1409 | Pop(expected.reg()); |
| 1410 | SmiUntag(expected.reg()); |
| 1411 | } |
| 1412 | } |
| 1413 | bind(&skip_flooding); |
| 1414 | } |
| 1415 | |
| 1416 | |
| 1417 | void MacroAssembler::InvokeFunctionCode(Register function, Register new_target, |
| 1418 | const ParameterCount& expected, |
| 1419 | const ParameterCount& actual, |
| 1420 | InvokeFlag flag, |
| 1421 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1422 | // You can't call a function without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1423 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1424 | DCHECK(function.is(r1)); |
| 1425 | DCHECK_IMPLIES(new_target.is_valid(), new_target.is(r3)); |
| 1426 | |
| 1427 | if (call_wrapper.NeedsDebugStepCheck()) { |
| 1428 | FloodFunctionIfStepping(function, new_target, expected, actual); |
| 1429 | } |
| 1430 | |
| 1431 | // Clear the new.target register if not given. |
| 1432 | if (!new_target.is_valid()) { |
| 1433 | LoadRoot(r3, Heap::kUndefinedValueRootIndex); |
| 1434 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1435 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1436 | Label done; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1437 | bool definitely_mismatches = false; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1438 | InvokePrologue(expected, actual, &done, &definitely_mismatches, flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1439 | call_wrapper); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1440 | if (!definitely_mismatches) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1441 | // We call indirectly through the code field in the function to |
| 1442 | // allow recompilation to take effect without changing any of the |
| 1443 | // call sites. |
| 1444 | Register code = r4; |
| 1445 | ldr(code, FieldMemOperand(function, JSFunction::kCodeEntryOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1446 | if (flag == CALL_FUNCTION) { |
| 1447 | call_wrapper.BeforeCall(CallSize(code)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1448 | Call(code); |
| 1449 | call_wrapper.AfterCall(); |
| 1450 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1451 | DCHECK(flag == JUMP_FUNCTION); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1452 | Jump(code); |
| 1453 | } |
Ben Murdoch | 85b7179 | 2012-04-11 18:30:58 +0100 | [diff] [blame] | 1454 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1455 | // Continue here if InvokePrologue does handle the invocation due to |
| 1456 | // mismatched parameter counts. |
| 1457 | bind(&done); |
| 1458 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1459 | } |
| 1460 | |
| 1461 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1462 | void MacroAssembler::InvokeFunction(Register fun, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1463 | Register new_target, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1464 | const ParameterCount& actual, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1465 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1466 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1467 | // You can't call a function without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1468 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1469 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1470 | // Contract with called JS functions requires that function is passed in r1. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1471 | DCHECK(fun.is(r1)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1472 | |
| 1473 | Register expected_reg = r2; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1474 | Register temp_reg = r4; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1475 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1476 | ldr(temp_reg, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1477 | ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 1478 | ldr(expected_reg, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1479 | FieldMemOperand(temp_reg, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1480 | SharedFunctionInfo::kFormalParameterCountOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1481 | SmiUntag(expected_reg); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1482 | |
| 1483 | ParameterCount expected(expected_reg); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1484 | InvokeFunctionCode(fun, new_target, expected, actual, flag, call_wrapper); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1485 | } |
| 1486 | |
| 1487 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1488 | void MacroAssembler::InvokeFunction(Register function, |
| 1489 | const ParameterCount& expected, |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1490 | const ParameterCount& actual, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1491 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1492 | const CallWrapper& call_wrapper) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1493 | // You can't call a function without a valid frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1494 | DCHECK(flag == JUMP_FUNCTION || has_frame()); |
| 1495 | |
| 1496 | // Contract with called JS functions requires that function is passed in r1. |
| 1497 | DCHECK(function.is(r1)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1498 | |
| 1499 | // Get the function and setup the context. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1500 | ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 1501 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1502 | InvokeFunctionCode(r1, no_reg, expected, actual, flag, call_wrapper); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1503 | } |
| 1504 | |
| 1505 | |
| 1506 | void MacroAssembler::InvokeFunction(Handle<JSFunction> function, |
| 1507 | const ParameterCount& expected, |
| 1508 | const ParameterCount& actual, |
| 1509 | InvokeFlag flag, |
| 1510 | const CallWrapper& call_wrapper) { |
| 1511 | Move(r1, function); |
| 1512 | InvokeFunction(r1, expected, actual, flag, call_wrapper); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1513 | } |
| 1514 | |
| 1515 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1516 | void MacroAssembler::IsObjectJSStringType(Register object, |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1517 | Register scratch, |
| 1518 | Label* fail) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1519 | DCHECK(kNotStringTag != 0); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1520 | |
| 1521 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 1522 | ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| 1523 | tst(scratch, Operand(kIsNotStringMask)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1524 | b(ne, fail); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1525 | } |
| 1526 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1527 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1528 | void MacroAssembler::IsObjectNameType(Register object, |
| 1529 | Register scratch, |
| 1530 | Label* fail) { |
| 1531 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 1532 | ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| 1533 | cmp(scratch, Operand(LAST_NAME_TYPE)); |
| 1534 | b(hi, fail); |
| 1535 | } |
| 1536 | |
| 1537 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1538 | void MacroAssembler::DebugBreak() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1539 | mov(r0, Operand::Zero()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1540 | mov(r1, |
| 1541 | Operand(ExternalReference(Runtime::kHandleDebuggerStatement, isolate()))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1542 | CEntryStub ces(isolate(), 1); |
| 1543 | DCHECK(AllowThisStubCall(&ces)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1544 | Call(ces.GetCode(), RelocInfo::DEBUGGER_STATEMENT); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1545 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1546 | |
| 1547 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1548 | void MacroAssembler::PushStackHandler() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1549 | // Adjust this code if not the case. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1550 | STATIC_ASSERT(StackHandlerConstants::kSize == 1 * kPointerSize); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1551 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1552 | |
| 1553 | // Link the current handler as the next handler. |
| 1554 | mov(r6, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| 1555 | ldr(r5, MemOperand(r6)); |
| 1556 | push(r5); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1557 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1558 | // Set this new handler as the current one. |
| 1559 | str(sp, MemOperand(r6)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1560 | } |
| 1561 | |
| 1562 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1563 | void MacroAssembler::PopStackHandler() { |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1564 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1565 | pop(r1); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1566 | mov(ip, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1567 | add(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize)); |
| 1568 | str(r1, MemOperand(ip)); |
| 1569 | } |
| 1570 | |
| 1571 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1572 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 1573 | Register scratch, |
| 1574 | Label* miss) { |
| 1575 | Label same_contexts; |
| 1576 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1577 | DCHECK(!holder_reg.is(scratch)); |
| 1578 | DCHECK(!holder_reg.is(ip)); |
| 1579 | DCHECK(!scratch.is(ip)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1580 | |
| 1581 | // Load current lexical context from the stack frame. |
| 1582 | ldr(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 1583 | // In debug mode, make sure the lexical context is set. |
| 1584 | #ifdef DEBUG |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1585 | cmp(scratch, Operand::Zero()); |
| 1586 | Check(ne, kWeShouldNotHaveAnEmptyLexicalContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1587 | #endif |
| 1588 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1589 | // Load the native context of the current context. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1590 | ldr(scratch, ContextMemOperand(scratch, Context::NATIVE_CONTEXT_INDEX)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1591 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1592 | // Check the context is a native context. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1593 | if (emit_debug_code()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1594 | // Cannot use ip as a temporary in this verification code. Due to the fact |
| 1595 | // that ip is clobbered as part of cmp with an object Operand. |
| 1596 | push(holder_reg); // Temporarily save holder on the stack. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1597 | // Read the first word and compare to the native_context_map. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1598 | ldr(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1599 | LoadRoot(ip, Heap::kNativeContextMapRootIndex); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1600 | cmp(holder_reg, ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1601 | Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1602 | pop(holder_reg); // Restore holder. |
| 1603 | } |
| 1604 | |
| 1605 | // Check if both contexts are the same. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1606 | ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1607 | cmp(scratch, Operand(ip)); |
| 1608 | b(eq, &same_contexts); |
| 1609 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1610 | // Check the context is a native context. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1611 | if (emit_debug_code()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1612 | // Cannot use ip as a temporary in this verification code. Due to the fact |
| 1613 | // that ip is clobbered as part of cmp with an object Operand. |
| 1614 | push(holder_reg); // Temporarily save holder on the stack. |
| 1615 | mov(holder_reg, ip); // Move ip to its holding place. |
| 1616 | LoadRoot(ip, Heap::kNullValueRootIndex); |
| 1617 | cmp(holder_reg, ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1618 | Check(ne, kJSGlobalProxyContextShouldNotBeNull); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1619 | |
| 1620 | ldr(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1621 | LoadRoot(ip, Heap::kNativeContextMapRootIndex); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1622 | cmp(holder_reg, ip); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1623 | Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1624 | // Restore ip is not needed. ip is reloaded below. |
| 1625 | pop(holder_reg); // Restore holder. |
| 1626 | // Restore ip to holder's context. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1627 | ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1628 | } |
| 1629 | |
| 1630 | // Check that the security token in the calling global object is |
| 1631 | // compatible with the security token in the receiving global |
| 1632 | // object. |
| 1633 | int token_offset = Context::kHeaderSize + |
| 1634 | Context::SECURITY_TOKEN_INDEX * kPointerSize; |
| 1635 | |
| 1636 | ldr(scratch, FieldMemOperand(scratch, token_offset)); |
| 1637 | ldr(ip, FieldMemOperand(ip, token_offset)); |
| 1638 | cmp(scratch, Operand(ip)); |
| 1639 | b(ne, miss); |
| 1640 | |
| 1641 | bind(&same_contexts); |
| 1642 | } |
| 1643 | |
| 1644 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1645 | // Compute the hash code from the untagged key. This must be kept in sync with |
| 1646 | // ComputeIntegerHash in utils.h and KeyedLoadGenericStub in |
| 1647 | // code-stub-hydrogen.cc |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1648 | void MacroAssembler::GetNumberHash(Register t0, Register scratch) { |
| 1649 | // First of all we assign the hash seed to scratch. |
| 1650 | LoadRoot(scratch, Heap::kHashSeedRootIndex); |
| 1651 | SmiUntag(scratch); |
| 1652 | |
| 1653 | // Xor original key with a seed. |
| 1654 | eor(t0, t0, Operand(scratch)); |
| 1655 | |
| 1656 | // Compute the hash code from the untagged key. This must be kept in sync |
| 1657 | // with ComputeIntegerHash in utils.h. |
| 1658 | // |
| 1659 | // hash = ~hash + (hash << 15); |
| 1660 | mvn(scratch, Operand(t0)); |
| 1661 | add(t0, scratch, Operand(t0, LSL, 15)); |
| 1662 | // hash = hash ^ (hash >> 12); |
| 1663 | eor(t0, t0, Operand(t0, LSR, 12)); |
| 1664 | // hash = hash + (hash << 2); |
| 1665 | add(t0, t0, Operand(t0, LSL, 2)); |
| 1666 | // hash = hash ^ (hash >> 4); |
| 1667 | eor(t0, t0, Operand(t0, LSR, 4)); |
| 1668 | // hash = hash * 2057; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1669 | mov(scratch, Operand(t0, LSL, 11)); |
| 1670 | add(t0, t0, Operand(t0, LSL, 3)); |
| 1671 | add(t0, t0, scratch); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1672 | // hash = hash ^ (hash >> 16); |
| 1673 | eor(t0, t0, Operand(t0, LSR, 16)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1674 | bic(t0, t0, Operand(0xc0000000u)); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1675 | } |
| 1676 | |
| 1677 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1678 | void MacroAssembler::LoadFromNumberDictionary(Label* miss, |
| 1679 | Register elements, |
| 1680 | Register key, |
| 1681 | Register result, |
| 1682 | Register t0, |
| 1683 | Register t1, |
| 1684 | Register t2) { |
| 1685 | // Register use: |
| 1686 | // |
| 1687 | // elements - holds the slow-case elements of the receiver on entry. |
| 1688 | // Unchanged unless 'result' is the same register. |
| 1689 | // |
| 1690 | // key - holds the smi key on entry. |
| 1691 | // Unchanged unless 'result' is the same register. |
| 1692 | // |
| 1693 | // result - holds the result on exit if the load succeeded. |
| 1694 | // Allowed to be the same as 'key' or 'result'. |
| 1695 | // Unchanged on bailout so 'key' or 'result' can be used |
| 1696 | // in further computation. |
| 1697 | // |
| 1698 | // Scratch registers: |
| 1699 | // |
| 1700 | // t0 - holds the untagged key on entry and holds the hash once computed. |
| 1701 | // |
| 1702 | // t1 - used to hold the capacity mask of the dictionary |
| 1703 | // |
| 1704 | // t2 - used for the index into the dictionary. |
| 1705 | Label done; |
| 1706 | |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1707 | GetNumberHash(t0, t1); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1708 | |
| 1709 | // Compute the capacity mask. |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1710 | ldr(t1, FieldMemOperand(elements, SeededNumberDictionary::kCapacityOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1711 | SmiUntag(t1); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1712 | sub(t1, t1, Operand(1)); |
| 1713 | |
| 1714 | // Generate an unrolled loop that performs a few probes before giving up. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1715 | for (int i = 0; i < kNumberDictionaryProbes; i++) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1716 | // Use t2 for index calculations and keep the hash intact in t0. |
| 1717 | mov(t2, t0); |
| 1718 | // Compute the masked index: (hash + i + i * i) & mask. |
| 1719 | if (i > 0) { |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1720 | add(t2, t2, Operand(SeededNumberDictionary::GetProbeOffset(i))); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1721 | } |
| 1722 | and_(t2, t2, Operand(t1)); |
| 1723 | |
| 1724 | // Scale the index by multiplying by the element size. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1725 | DCHECK(SeededNumberDictionary::kEntrySize == 3); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1726 | add(t2, t2, Operand(t2, LSL, 1)); // t2 = t2 * 3 |
| 1727 | |
| 1728 | // Check if the key is identical to the name. |
| 1729 | add(t2, elements, Operand(t2, LSL, kPointerSizeLog2)); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1730 | ldr(ip, FieldMemOperand(t2, SeededNumberDictionary::kElementsStartOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1731 | cmp(key, Operand(ip)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1732 | if (i != kNumberDictionaryProbes - 1) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1733 | b(eq, &done); |
| 1734 | } else { |
| 1735 | b(ne, miss); |
| 1736 | } |
| 1737 | } |
| 1738 | |
| 1739 | bind(&done); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1740 | // Check that the value is a field property. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1741 | // t2: elements + (index * kPointerSize) |
| 1742 | const int kDetailsOffset = |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1743 | SeededNumberDictionary::kElementsStartOffset + 2 * kPointerSize; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1744 | ldr(t1, FieldMemOperand(t2, kDetailsOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1745 | DCHECK_EQ(DATA, 0); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1746 | tst(t1, Operand(Smi::FromInt(PropertyDetails::TypeField::kMask))); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1747 | b(ne, miss); |
| 1748 | |
| 1749 | // Get the value at the masked, scaled index and return. |
| 1750 | const int kValueOffset = |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1751 | SeededNumberDictionary::kElementsStartOffset + kPointerSize; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1752 | ldr(result, FieldMemOperand(t2, kValueOffset)); |
| 1753 | } |
| 1754 | |
| 1755 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1756 | void MacroAssembler::Allocate(int object_size, |
| 1757 | Register result, |
| 1758 | Register scratch1, |
| 1759 | Register scratch2, |
| 1760 | Label* gc_required, |
| 1761 | AllocationFlags flags) { |
| 1762 | DCHECK(object_size <= Page::kMaxRegularHeapObjectSize); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1763 | if (!FLAG_inline_new) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1764 | if (emit_debug_code()) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1765 | // Trash the registers to simulate an allocation failure. |
| 1766 | mov(result, Operand(0x7091)); |
| 1767 | mov(scratch1, Operand(0x7191)); |
| 1768 | mov(scratch2, Operand(0x7291)); |
| 1769 | } |
| 1770 | jmp(gc_required); |
| 1771 | return; |
| 1772 | } |
| 1773 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1774 | DCHECK(!AreAliased(result, scratch1, scratch2, ip)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1775 | |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1776 | // Make object size into bytes. |
| 1777 | if ((flags & SIZE_IN_WORDS) != 0) { |
| 1778 | object_size *= kPointerSize; |
| 1779 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1780 | DCHECK_EQ(0, object_size & kObjectAlignmentMask); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1781 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1782 | // Check relative positions of allocation top and limit addresses. |
| 1783 | // The values must be adjacent in memory to allow the use of LDM. |
| 1784 | // Also, assert that the registers are numbered such that the values |
| 1785 | // are loaded in the correct order. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1786 | ExternalReference allocation_top = |
| 1787 | AllocationUtils::GetAllocationTopReference(isolate(), flags); |
| 1788 | ExternalReference allocation_limit = |
| 1789 | AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1790 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1791 | intptr_t top = reinterpret_cast<intptr_t>(allocation_top.address()); |
| 1792 | intptr_t limit = reinterpret_cast<intptr_t>(allocation_limit.address()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1793 | DCHECK((limit - top) == kPointerSize); |
| 1794 | DCHECK(result.code() < ip.code()); |
| 1795 | |
| 1796 | // Set up allocation top address register. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1797 | Register top_address = scratch1; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1798 | // This code stores a temporary value in ip. This is OK, as the code below |
| 1799 | // does not need ip for implicit literal generation. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1800 | Register alloc_limit = ip; |
| 1801 | Register result_end = scratch2; |
| 1802 | mov(top_address, Operand(allocation_top)); |
| 1803 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1804 | if ((flags & RESULT_CONTAINS_TOP) == 0) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1805 | // Load allocation top into result and allocation limit into alloc_limit. |
| 1806 | ldm(ia, top_address, result.bit() | alloc_limit.bit()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1807 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1808 | if (emit_debug_code()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1809 | // Assert that result actually contains top on entry. |
| 1810 | ldr(alloc_limit, MemOperand(top_address)); |
| 1811 | cmp(result, alloc_limit); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1812 | Check(eq, kUnexpectedAllocationTop); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1813 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1814 | // Load allocation limit. Result already contains allocation top. |
| 1815 | ldr(alloc_limit, MemOperand(top_address, limit - top)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1816 | } |
| 1817 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1818 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| 1819 | // Align the next allocation. Storing the filler map without checking top is |
| 1820 | // 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] | 1821 | STATIC_ASSERT(kPointerAlignment * 2 == kDoubleAlignment); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1822 | and_(result_end, result, Operand(kDoubleAlignmentMask), SetCC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1823 | Label aligned; |
| 1824 | b(eq, &aligned); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1825 | if ((flags & PRETENURE) != 0) { |
| 1826 | cmp(result, Operand(alloc_limit)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1827 | b(hs, gc_required); |
| 1828 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1829 | mov(result_end, Operand(isolate()->factory()->one_pointer_filler_map())); |
| 1830 | str(result_end, MemOperand(result, kDoubleSize / 2, PostIndex)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1831 | bind(&aligned); |
| 1832 | } |
| 1833 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1834 | // 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] | 1835 | // to calculate the new top. We must preserve the ip register at this |
| 1836 | // point, so we cannot just use add(). |
| 1837 | DCHECK(object_size > 0); |
| 1838 | Register source = result; |
| 1839 | Condition cond = al; |
| 1840 | int shift = 0; |
| 1841 | while (object_size != 0) { |
| 1842 | if (((object_size >> shift) & 0x03) == 0) { |
| 1843 | shift += 2; |
| 1844 | } else { |
| 1845 | int bits = object_size & (0xff << shift); |
| 1846 | object_size -= bits; |
| 1847 | shift += 8; |
| 1848 | Operand bits_operand(bits); |
| 1849 | DCHECK(bits_operand.instructions_required(this) == 1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1850 | add(result_end, source, bits_operand, SetCC, cond); |
| 1851 | source = result_end; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1852 | cond = cc; |
| 1853 | } |
| 1854 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1855 | b(cs, gc_required); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1856 | cmp(result_end, Operand(alloc_limit)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1857 | b(hi, gc_required); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1858 | str(result_end, MemOperand(top_address)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1859 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1860 | // Tag object if requested. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1861 | if ((flags & TAG_OBJECT) != 0) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1862 | add(result, result, Operand(kHeapObjectTag)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1863 | } |
| 1864 | } |
| 1865 | |
| 1866 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1867 | void MacroAssembler::Allocate(Register object_size, Register result, |
| 1868 | Register result_end, Register scratch, |
| 1869 | Label* gc_required, AllocationFlags flags) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1870 | if (!FLAG_inline_new) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1871 | if (emit_debug_code()) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1872 | // Trash the registers to simulate an allocation failure. |
| 1873 | mov(result, Operand(0x7091)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1874 | mov(scratch, Operand(0x7191)); |
| 1875 | mov(result_end, Operand(0x7291)); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1876 | } |
| 1877 | jmp(gc_required); |
| 1878 | return; |
| 1879 | } |
| 1880 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1881 | // |object_size| and |result_end| may overlap if the DOUBLE_ALIGNMENT flag |
| 1882 | // is not specified. Other registers must not overlap. |
| 1883 | DCHECK(!AreAliased(object_size, result, scratch, ip)); |
| 1884 | DCHECK(!AreAliased(result_end, result, scratch, ip)); |
| 1885 | DCHECK((flags & DOUBLE_ALIGNMENT) == 0 || !object_size.is(result_end)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1886 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1887 | // Check relative positions of allocation top and limit addresses. |
| 1888 | // The values must be adjacent in memory to allow the use of LDM. |
| 1889 | // Also, assert that the registers are numbered such that the values |
| 1890 | // are loaded in the correct order. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1891 | ExternalReference allocation_top = |
| 1892 | AllocationUtils::GetAllocationTopReference(isolate(), flags); |
| 1893 | ExternalReference allocation_limit = |
| 1894 | AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1895 | intptr_t top = reinterpret_cast<intptr_t>(allocation_top.address()); |
| 1896 | intptr_t limit = reinterpret_cast<intptr_t>(allocation_limit.address()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1897 | DCHECK((limit - top) == kPointerSize); |
| 1898 | DCHECK(result.code() < ip.code()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1899 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1900 | // Set up allocation top address and allocation limit registers. |
| 1901 | Register top_address = scratch; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1902 | // This code stores a temporary value in ip. This is OK, as the code below |
| 1903 | // does not need ip for implicit literal generation. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1904 | Register alloc_limit = ip; |
| 1905 | mov(top_address, Operand(allocation_top)); |
| 1906 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1907 | if ((flags & RESULT_CONTAINS_TOP) == 0) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1908 | // Load allocation top into result and allocation limit into alloc_limit. |
| 1909 | ldm(ia, top_address, result.bit() | alloc_limit.bit()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1910 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1911 | if (emit_debug_code()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1912 | // Assert that result actually contains top on entry. |
| 1913 | ldr(alloc_limit, MemOperand(top_address)); |
| 1914 | cmp(result, alloc_limit); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1915 | Check(eq, kUnexpectedAllocationTop); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1916 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1917 | // Load allocation limit. Result already contains allocation top. |
| 1918 | ldr(alloc_limit, MemOperand(top_address, limit - top)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1919 | } |
| 1920 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1921 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| 1922 | // Align the next allocation. Storing the filler map without checking top is |
| 1923 | // 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] | 1924 | DCHECK(kPointerAlignment * 2 == kDoubleAlignment); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1925 | and_(result_end, result, Operand(kDoubleAlignmentMask), SetCC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1926 | Label aligned; |
| 1927 | b(eq, &aligned); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1928 | if ((flags & PRETENURE) != 0) { |
| 1929 | cmp(result, Operand(alloc_limit)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1930 | b(hs, gc_required); |
| 1931 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1932 | mov(result_end, Operand(isolate()->factory()->one_pointer_filler_map())); |
| 1933 | str(result_end, MemOperand(result, kDoubleSize / 2, PostIndex)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1934 | bind(&aligned); |
| 1935 | } |
| 1936 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1937 | // 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] | 1938 | // to calculate the new top. Object size may be in words so a shift is |
| 1939 | // required to get the number of bytes. |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1940 | if ((flags & SIZE_IN_WORDS) != 0) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1941 | add(result_end, result, Operand(object_size, LSL, kPointerSizeLog2), SetCC); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1942 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1943 | add(result_end, result, Operand(object_size), SetCC); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1944 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1945 | b(cs, gc_required); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1946 | cmp(result_end, Operand(alloc_limit)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1947 | b(hi, gc_required); |
| 1948 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1949 | // Update allocation top. result temporarily holds the new top. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1950 | if (emit_debug_code()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1951 | tst(result_end, Operand(kObjectAlignmentMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1952 | Check(eq, kUnalignedAllocationInNewSpace); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1953 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1954 | str(result_end, MemOperand(top_address)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1955 | |
| 1956 | // Tag object if requested. |
| 1957 | if ((flags & TAG_OBJECT) != 0) { |
| 1958 | add(result, result, Operand(kHeapObjectTag)); |
| 1959 | } |
| 1960 | } |
| 1961 | |
| 1962 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1963 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 1964 | Register length, |
| 1965 | Register scratch1, |
| 1966 | Register scratch2, |
| 1967 | Register scratch3, |
| 1968 | Label* gc_required) { |
| 1969 | // Calculate the number of bytes needed for the characters in the string while |
| 1970 | // observing object alignment. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1971 | DCHECK((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1972 | mov(scratch1, Operand(length, LSL, 1)); // Length in bytes, not chars. |
| 1973 | add(scratch1, scratch1, |
| 1974 | Operand(kObjectAlignmentMask + SeqTwoByteString::kHeaderSize)); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1975 | and_(scratch1, scratch1, Operand(~kObjectAlignmentMask)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1976 | |
| 1977 | // Allocate two-byte string in new space. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1978 | Allocate(scratch1, |
| 1979 | result, |
| 1980 | scratch2, |
| 1981 | scratch3, |
| 1982 | gc_required, |
| 1983 | TAG_OBJECT); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1984 | |
| 1985 | // Set the map, length and hash field. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1986 | InitializeNewString(result, |
| 1987 | length, |
| 1988 | Heap::kStringMapRootIndex, |
| 1989 | scratch1, |
| 1990 | scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1991 | } |
| 1992 | |
| 1993 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1994 | void MacroAssembler::AllocateOneByteString(Register result, Register length, |
| 1995 | Register scratch1, Register scratch2, |
| 1996 | Register scratch3, |
| 1997 | Label* gc_required) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1998 | // Calculate the number of bytes needed for the characters in the string while |
| 1999 | // observing object alignment. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2000 | DCHECK((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 2001 | DCHECK(kCharSize == 1); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2002 | add(scratch1, length, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2003 | Operand(kObjectAlignmentMask + SeqOneByteString::kHeaderSize)); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 2004 | and_(scratch1, scratch1, Operand(~kObjectAlignmentMask)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2005 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2006 | // Allocate one-byte string in new space. |
| 2007 | Allocate(scratch1, |
| 2008 | result, |
| 2009 | scratch2, |
| 2010 | scratch3, |
| 2011 | gc_required, |
| 2012 | TAG_OBJECT); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2013 | |
| 2014 | // Set the map, length and hash field. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2015 | InitializeNewString(result, length, Heap::kOneByteStringMapRootIndex, |
| 2016 | scratch1, scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2017 | } |
| 2018 | |
| 2019 | |
| 2020 | void MacroAssembler::AllocateTwoByteConsString(Register result, |
| 2021 | Register length, |
| 2022 | Register scratch1, |
| 2023 | Register scratch2, |
| 2024 | Label* gc_required) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2025 | Allocate(ConsString::kSize, result, scratch1, scratch2, gc_required, |
| 2026 | TAG_OBJECT); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2027 | |
| 2028 | InitializeNewString(result, |
| 2029 | length, |
| 2030 | Heap::kConsStringMapRootIndex, |
| 2031 | scratch1, |
| 2032 | scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2033 | } |
| 2034 | |
| 2035 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2036 | void MacroAssembler::AllocateOneByteConsString(Register result, Register length, |
| 2037 | Register scratch1, |
| 2038 | Register scratch2, |
| 2039 | Label* gc_required) { |
| 2040 | Allocate(ConsString::kSize, |
| 2041 | result, |
| 2042 | scratch1, |
| 2043 | scratch2, |
| 2044 | gc_required, |
| 2045 | TAG_OBJECT); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2046 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2047 | InitializeNewString(result, length, Heap::kConsOneByteStringMapRootIndex, |
| 2048 | scratch1, scratch2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2049 | } |
| 2050 | |
| 2051 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2052 | void MacroAssembler::AllocateTwoByteSlicedString(Register result, |
| 2053 | Register length, |
| 2054 | Register scratch1, |
| 2055 | Register scratch2, |
| 2056 | Label* gc_required) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2057 | Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
| 2058 | TAG_OBJECT); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2059 | |
| 2060 | InitializeNewString(result, |
| 2061 | length, |
| 2062 | Heap::kSlicedStringMapRootIndex, |
| 2063 | scratch1, |
| 2064 | scratch2); |
| 2065 | } |
| 2066 | |
| 2067 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2068 | void MacroAssembler::AllocateOneByteSlicedString(Register result, |
| 2069 | Register length, |
| 2070 | Register scratch1, |
| 2071 | Register scratch2, |
| 2072 | Label* gc_required) { |
| 2073 | Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
| 2074 | TAG_OBJECT); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2075 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2076 | InitializeNewString(result, length, Heap::kSlicedOneByteStringMapRootIndex, |
| 2077 | scratch1, scratch2); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2078 | } |
| 2079 | |
| 2080 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2081 | void MacroAssembler::CompareObjectType(Register object, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2082 | Register map, |
| 2083 | Register type_reg, |
| 2084 | InstanceType type) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2085 | const Register temp = type_reg.is(no_reg) ? ip : type_reg; |
| 2086 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2087 | ldr(map, FieldMemOperand(object, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2088 | CompareInstanceType(map, temp, type); |
| 2089 | } |
| 2090 | |
| 2091 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2092 | void MacroAssembler::CompareInstanceType(Register map, |
| 2093 | Register type_reg, |
| 2094 | InstanceType type) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2095 | // Registers map and type_reg can be ip. These two lines assert |
| 2096 | // that ip can be used with the two instructions (the constants |
| 2097 | // will never need ip). |
| 2098 | STATIC_ASSERT(Map::kInstanceTypeOffset < 4096); |
| 2099 | STATIC_ASSERT(LAST_TYPE < 256); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2100 | ldrb(type_reg, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 2101 | cmp(type_reg, Operand(type)); |
| 2102 | } |
| 2103 | |
| 2104 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2105 | void MacroAssembler::CompareRoot(Register obj, |
| 2106 | Heap::RootListIndex index) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2107 | DCHECK(!obj.is(ip)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2108 | LoadRoot(ip, index); |
| 2109 | cmp(obj, ip); |
| 2110 | } |
| 2111 | |
| 2112 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2113 | void MacroAssembler::CheckFastElements(Register map, |
| 2114 | Register scratch, |
| 2115 | Label* fail) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2116 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 2117 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 2118 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 2119 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2120 | ldrb(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2121 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2122 | b(hi, fail); |
| 2123 | } |
| 2124 | |
| 2125 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2126 | void MacroAssembler::CheckFastObjectElements(Register map, |
| 2127 | Register scratch, |
| 2128 | Label* fail) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2129 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 2130 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 2131 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 2132 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2133 | ldrb(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2134 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2135 | b(ls, fail); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2136 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2137 | b(hi, fail); |
| 2138 | } |
| 2139 | |
| 2140 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2141 | void MacroAssembler::CheckFastSmiElements(Register map, |
| 2142 | Register scratch, |
| 2143 | Label* fail) { |
| 2144 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 2145 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2146 | ldrb(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2147 | cmp(scratch, Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2148 | b(hi, fail); |
| 2149 | } |
| 2150 | |
| 2151 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2152 | void MacroAssembler::StoreNumberToDoubleElements( |
| 2153 | Register value_reg, |
| 2154 | Register key_reg, |
| 2155 | Register elements_reg, |
| 2156 | Register scratch1, |
| 2157 | LowDwVfpRegister double_scratch, |
| 2158 | Label* fail, |
| 2159 | int elements_offset) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2160 | DCHECK(!AreAliased(value_reg, key_reg, elements_reg, scratch1)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2161 | Label smi_value, store; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2162 | |
| 2163 | // Handle smi values specially. |
| 2164 | JumpIfSmi(value_reg, &smi_value); |
| 2165 | |
| 2166 | // Ensure that the object is a heap number |
| 2167 | CheckMap(value_reg, |
| 2168 | scratch1, |
| 2169 | isolate()->factory()->heap_number_map(), |
| 2170 | fail, |
| 2171 | DONT_DO_SMI_CHECK); |
| 2172 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2173 | vldr(double_scratch, FieldMemOperand(value_reg, HeapNumber::kValueOffset)); |
| 2174 | // Force a canonical NaN. |
| 2175 | if (emit_debug_code()) { |
| 2176 | vmrs(ip); |
| 2177 | tst(ip, Operand(kVFPDefaultNaNModeControlBit)); |
| 2178 | Assert(ne, kDefaultNaNModeNotSet); |
| 2179 | } |
| 2180 | VFPCanonicalizeNaN(double_scratch); |
| 2181 | b(&store); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2182 | |
| 2183 | bind(&smi_value); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2184 | SmiToDouble(double_scratch, value_reg); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2185 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2186 | bind(&store); |
| 2187 | add(scratch1, elements_reg, Operand::DoubleOffsetFromSmiKey(key_reg)); |
| 2188 | vstr(double_scratch, |
| 2189 | FieldMemOperand(scratch1, |
| 2190 | FixedDoubleArray::kHeaderSize - elements_offset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2191 | } |
| 2192 | |
| 2193 | |
| 2194 | void MacroAssembler::CompareMap(Register obj, |
| 2195 | Register scratch, |
| 2196 | Handle<Map> map, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2197 | Label* early_success) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2198 | ldr(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2199 | CompareMap(scratch, map, early_success); |
| 2200 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2201 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2202 | |
| 2203 | void MacroAssembler::CompareMap(Register obj_map, |
| 2204 | Handle<Map> map, |
| 2205 | Label* early_success) { |
| 2206 | cmp(obj_map, Operand(map)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2207 | } |
| 2208 | |
| 2209 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2210 | void MacroAssembler::CheckMap(Register obj, |
| 2211 | Register scratch, |
| 2212 | Handle<Map> map, |
| 2213 | Label* fail, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2214 | SmiCheckType smi_check_type) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2215 | if (smi_check_type == DO_SMI_CHECK) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2216 | JumpIfSmi(obj, fail); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2217 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2218 | |
| 2219 | Label success; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2220 | CompareMap(obj, scratch, map, &success); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2221 | b(ne, fail); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2222 | bind(&success); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2223 | } |
| 2224 | |
| 2225 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2226 | void MacroAssembler::CheckMap(Register obj, |
| 2227 | Register scratch, |
| 2228 | Heap::RootListIndex index, |
| 2229 | Label* fail, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2230 | SmiCheckType smi_check_type) { |
| 2231 | if (smi_check_type == DO_SMI_CHECK) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2232 | JumpIfSmi(obj, fail); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2233 | } |
| 2234 | ldr(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| 2235 | LoadRoot(ip, index); |
| 2236 | cmp(scratch, ip); |
| 2237 | b(ne, fail); |
| 2238 | } |
| 2239 | |
| 2240 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2241 | void MacroAssembler::DispatchWeakMap(Register obj, Register scratch1, |
| 2242 | Register scratch2, Handle<WeakCell> cell, |
| 2243 | Handle<Code> success, |
| 2244 | SmiCheckType smi_check_type) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2245 | Label fail; |
| 2246 | if (smi_check_type == DO_SMI_CHECK) { |
| 2247 | JumpIfSmi(obj, &fail); |
| 2248 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2249 | ldr(scratch1, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| 2250 | CmpWeakValue(scratch1, cell, scratch2); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2251 | Jump(success, RelocInfo::CODE_TARGET, eq); |
| 2252 | bind(&fail); |
| 2253 | } |
| 2254 | |
| 2255 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2256 | void MacroAssembler::CmpWeakValue(Register value, Handle<WeakCell> cell, |
| 2257 | Register scratch) { |
| 2258 | mov(scratch, Operand(cell)); |
| 2259 | ldr(scratch, FieldMemOperand(scratch, WeakCell::kValueOffset)); |
| 2260 | cmp(value, scratch); |
| 2261 | } |
| 2262 | |
| 2263 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2264 | void MacroAssembler::GetWeakValue(Register value, Handle<WeakCell> cell) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2265 | mov(value, Operand(cell)); |
| 2266 | ldr(value, FieldMemOperand(value, WeakCell::kValueOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2267 | } |
| 2268 | |
| 2269 | |
| 2270 | void MacroAssembler::LoadWeakValue(Register value, Handle<WeakCell> cell, |
| 2271 | Label* miss) { |
| 2272 | GetWeakValue(value, cell); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2273 | JumpIfSmi(value, miss); |
| 2274 | } |
| 2275 | |
| 2276 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2277 | void MacroAssembler::GetMapConstructor(Register result, Register map, |
| 2278 | Register temp, Register temp2) { |
| 2279 | Label done, loop; |
| 2280 | ldr(result, FieldMemOperand(map, Map::kConstructorOrBackPointerOffset)); |
| 2281 | bind(&loop); |
| 2282 | JumpIfSmi(result, &done); |
| 2283 | CompareObjectType(result, temp, temp2, MAP_TYPE); |
| 2284 | b(ne, &done); |
| 2285 | ldr(result, FieldMemOperand(result, Map::kConstructorOrBackPointerOffset)); |
| 2286 | b(&loop); |
| 2287 | bind(&done); |
| 2288 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2289 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2290 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2291 | void MacroAssembler::TryGetFunctionPrototype(Register function, Register result, |
| 2292 | Register scratch, Label* miss) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2293 | // Get the prototype or initial map from the function. |
| 2294 | ldr(result, |
| 2295 | FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 2296 | |
| 2297 | // If the prototype or initial map is the hole, don't return it and |
| 2298 | // simply miss the cache instead. This will allow us to allocate a |
| 2299 | // prototype object on-demand in the runtime system. |
| 2300 | LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 2301 | cmp(result, ip); |
| 2302 | b(eq, miss); |
| 2303 | |
| 2304 | // If the function does not have an initial map, we're done. |
| 2305 | Label done; |
| 2306 | CompareObjectType(result, scratch, scratch, MAP_TYPE); |
| 2307 | b(ne, &done); |
| 2308 | |
| 2309 | // Get the prototype from the initial map. |
| 2310 | ldr(result, FieldMemOperand(result, Map::kPrototypeOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2311 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2312 | // All done. |
| 2313 | bind(&done); |
| 2314 | } |
| 2315 | |
| 2316 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2317 | void MacroAssembler::CallStub(CodeStub* stub, |
| 2318 | TypeFeedbackId ast_id, |
| 2319 | Condition cond) { |
| 2320 | DCHECK(AllowThisStubCall(stub)); // Stub calls are not allowed in some stubs. |
| 2321 | Call(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id, cond); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2322 | } |
| 2323 | |
| 2324 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2325 | void MacroAssembler::TailCallStub(CodeStub* stub, Condition cond) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2326 | Jump(stub->GetCode(), RelocInfo::CODE_TARGET, cond); |
| 2327 | } |
| 2328 | |
| 2329 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2330 | bool MacroAssembler::AllowThisStubCall(CodeStub* stub) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2331 | return has_frame_ || !stub->SometimesSetsUpAFrame(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2332 | } |
| 2333 | |
| 2334 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2335 | void MacroAssembler::IndexFromHash(Register hash, Register index) { |
| 2336 | // If the hash field contains an array index pick it out. The assert checks |
| 2337 | // that the constants for the maximum number of digits for an array index |
| 2338 | // cached in the hash field and the number of bits reserved for it does not |
| 2339 | // conflict. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2340 | DCHECK(TenToThe(String::kMaxCachedArrayIndexLength) < |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2341 | (1 << String::kArrayIndexValueBits)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2342 | DecodeFieldToSmi<String::ArrayIndexValueBits>(index, hash); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2343 | } |
| 2344 | |
| 2345 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2346 | void MacroAssembler::SmiToDouble(LowDwVfpRegister value, Register smi) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2347 | if (CpuFeatures::IsSupported(VFP3)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2348 | vmov(value.low(), smi); |
| 2349 | vcvt_f64_s32(value, 1); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 2350 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2351 | SmiUntag(ip, smi); |
| 2352 | vmov(value.low(), ip); |
| 2353 | vcvt_f64_s32(value, value.low()); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 2354 | } |
| 2355 | } |
| 2356 | |
| 2357 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2358 | void MacroAssembler::TestDoubleIsInt32(DwVfpRegister double_input, |
| 2359 | LowDwVfpRegister double_scratch) { |
| 2360 | DCHECK(!double_input.is(double_scratch)); |
| 2361 | vcvt_s32_f64(double_scratch.low(), double_input); |
| 2362 | vcvt_f64_s32(double_scratch, double_scratch.low()); |
| 2363 | VFPCompareAndSetFlags(double_input, double_scratch); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2364 | } |
| 2365 | |
| 2366 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2367 | void MacroAssembler::TryDoubleToInt32Exact(Register result, |
| 2368 | DwVfpRegister double_input, |
| 2369 | LowDwVfpRegister double_scratch) { |
| 2370 | DCHECK(!double_input.is(double_scratch)); |
| 2371 | vcvt_s32_f64(double_scratch.low(), double_input); |
| 2372 | vmov(result, double_scratch.low()); |
| 2373 | vcvt_f64_s32(double_scratch, double_scratch.low()); |
| 2374 | VFPCompareAndSetFlags(double_input, double_scratch); |
| 2375 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2376 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2377 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2378 | void MacroAssembler::TryInt32Floor(Register result, |
| 2379 | DwVfpRegister double_input, |
| 2380 | Register input_high, |
| 2381 | LowDwVfpRegister double_scratch, |
| 2382 | Label* done, |
| 2383 | Label* exact) { |
| 2384 | DCHECK(!result.is(input_high)); |
| 2385 | DCHECK(!double_input.is(double_scratch)); |
| 2386 | Label negative, exception; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2387 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2388 | VmovHigh(input_high, double_input); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2389 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2390 | // Test for NaN and infinities. |
| 2391 | Sbfx(result, input_high, |
| 2392 | HeapNumber::kExponentShift, HeapNumber::kExponentBits); |
| 2393 | cmp(result, Operand(-1)); |
| 2394 | b(eq, &exception); |
| 2395 | // Test for values that can be exactly represented as a |
| 2396 | // signed 32-bit integer. |
| 2397 | TryDoubleToInt32Exact(result, double_input, double_scratch); |
| 2398 | // If exact, return (result already fetched). |
| 2399 | b(eq, exact); |
| 2400 | cmp(input_high, Operand::Zero()); |
| 2401 | b(mi, &negative); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2402 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2403 | // Input is in ]+0, +inf[. |
| 2404 | // If result equals 0x7fffffff input was out of range or |
| 2405 | // in ]0x7fffffff, 0x80000000[. We ignore this last case which |
| 2406 | // could fits into an int32, that means we always think input was |
| 2407 | // out of range and always go to exception. |
| 2408 | // If result < 0x7fffffff, go to done, result fetched. |
| 2409 | cmn(result, Operand(1)); |
| 2410 | b(mi, &exception); |
| 2411 | b(done); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2412 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2413 | // Input is in ]-inf, -0[. |
| 2414 | // If x is a non integer negative number, |
| 2415 | // floor(x) <=> round_to_zero(x) - 1. |
| 2416 | bind(&negative); |
| 2417 | sub(result, result, Operand(1), SetCC); |
| 2418 | // If result is still negative, go to done, result fetched. |
| 2419 | // Else, we had an overflow and we fall through exception. |
| 2420 | b(mi, done); |
| 2421 | bind(&exception); |
| 2422 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2423 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2424 | void MacroAssembler::TryInlineTruncateDoubleToI(Register result, |
| 2425 | DwVfpRegister double_input, |
| 2426 | Label* done) { |
| 2427 | LowDwVfpRegister double_scratch = kScratchDoubleReg; |
| 2428 | vcvt_s32_f64(double_scratch.low(), double_input); |
| 2429 | vmov(result, double_scratch.low()); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2430 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2431 | // If result is not saturated (0x7fffffff or 0x80000000), we are done. |
| 2432 | sub(ip, result, Operand(1)); |
| 2433 | cmp(ip, Operand(0x7ffffffe)); |
| 2434 | b(lt, done); |
| 2435 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2436 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2437 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2438 | void MacroAssembler::TruncateDoubleToI(Register result, |
| 2439 | DwVfpRegister double_input) { |
| 2440 | Label done; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2441 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2442 | TryInlineTruncateDoubleToI(result, double_input, &done); |
| 2443 | |
| 2444 | // If we fell through then inline version didn't succeed - call stub instead. |
| 2445 | push(lr); |
| 2446 | sub(sp, sp, Operand(kDoubleSize)); // Put input on stack. |
| 2447 | vstr(double_input, MemOperand(sp, 0)); |
| 2448 | |
| 2449 | DoubleToIStub stub(isolate(), sp, result, 0, true, true); |
| 2450 | CallStub(&stub); |
| 2451 | |
| 2452 | add(sp, sp, Operand(kDoubleSize)); |
| 2453 | pop(lr); |
| 2454 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2455 | bind(&done); |
| 2456 | } |
| 2457 | |
| 2458 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2459 | void MacroAssembler::TruncateHeapNumberToI(Register result, |
| 2460 | Register object) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2461 | Label done; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2462 | LowDwVfpRegister double_scratch = kScratchDoubleReg; |
| 2463 | DCHECK(!result.is(object)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2464 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2465 | vldr(double_scratch, |
| 2466 | MemOperand(object, HeapNumber::kValueOffset - kHeapObjectTag)); |
| 2467 | TryInlineTruncateDoubleToI(result, double_scratch, &done); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2468 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2469 | // If we fell through then inline version didn't succeed - call stub instead. |
| 2470 | push(lr); |
| 2471 | DoubleToIStub stub(isolate(), |
| 2472 | object, |
| 2473 | result, |
| 2474 | HeapNumber::kValueOffset - kHeapObjectTag, |
| 2475 | true, |
| 2476 | true); |
| 2477 | CallStub(&stub); |
| 2478 | pop(lr); |
| 2479 | |
| 2480 | bind(&done); |
| 2481 | } |
| 2482 | |
| 2483 | |
| 2484 | void MacroAssembler::TruncateNumberToI(Register object, |
| 2485 | Register result, |
| 2486 | Register heap_number_map, |
| 2487 | Register scratch1, |
| 2488 | Label* not_number) { |
| 2489 | Label done; |
| 2490 | DCHECK(!result.is(object)); |
| 2491 | |
| 2492 | UntagAndJumpIfSmi(result, object, &done); |
| 2493 | JumpIfNotHeapNumber(object, heap_number_map, scratch1, not_number); |
| 2494 | TruncateHeapNumberToI(result, object); |
| 2495 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2496 | bind(&done); |
| 2497 | } |
| 2498 | |
| 2499 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2500 | void MacroAssembler::GetLeastBitsFromSmi(Register dst, |
| 2501 | Register src, |
| 2502 | int num_least_bits) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2503 | if (CpuFeatures::IsSupported(ARMv7) && !predictable_code_size()) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2504 | ubfx(dst, src, kSmiTagSize, num_least_bits); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2505 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2506 | SmiUntag(dst, src); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2507 | and_(dst, dst, Operand((1 << num_least_bits) - 1)); |
| 2508 | } |
| 2509 | } |
| 2510 | |
| 2511 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2512 | void MacroAssembler::GetLeastBitsFromInt32(Register dst, |
| 2513 | Register src, |
| 2514 | int num_least_bits) { |
| 2515 | and_(dst, src, Operand((1 << num_least_bits) - 1)); |
| 2516 | } |
| 2517 | |
| 2518 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2519 | void MacroAssembler::CallRuntime(const Runtime::Function* f, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2520 | int num_arguments, |
| 2521 | SaveFPRegsMode save_doubles) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2522 | // All parameters are on the stack. r0 has the return value after call. |
| 2523 | |
| 2524 | // If the expected number of arguments of the runtime function is |
| 2525 | // constant, we check that the actual number of arguments match the |
| 2526 | // expectation. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2527 | CHECK(f->nargs < 0 || f->nargs == num_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2528 | |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 2529 | // TODO(1236192): Most runtime routines don't need the number of |
| 2530 | // arguments passed in because it is constant. At some point we |
| 2531 | // should remove this need and make the runtime routine entry code |
| 2532 | // smarter. |
| 2533 | mov(r0, Operand(num_arguments)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2534 | mov(r1, Operand(ExternalReference(f, isolate()))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2535 | CEntryStub stub(isolate(), 1, save_doubles); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2536 | CallStub(&stub); |
| 2537 | } |
| 2538 | |
| 2539 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2540 | void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
| 2541 | int num_arguments) { |
| 2542 | mov(r0, Operand(num_arguments)); |
| 2543 | mov(r1, Operand(ext)); |
| 2544 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2545 | CEntryStub stub(isolate(), 1); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2546 | CallStub(&stub); |
| 2547 | } |
| 2548 | |
| 2549 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2550 | void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid) { |
| 2551 | const Runtime::Function* function = Runtime::FunctionForId(fid); |
| 2552 | DCHECK_EQ(1, function->result_size); |
| 2553 | if (function->nargs >= 0) { |
| 2554 | // TODO(1236192): Most runtime routines don't need the number of |
| 2555 | // arguments passed in because it is constant. At some point we |
| 2556 | // should remove this need and make the runtime routine entry code |
| 2557 | // smarter. |
| 2558 | mov(r0, Operand(function->nargs)); |
| 2559 | } |
| 2560 | JumpToExternalReference(ExternalReference(fid, isolate())); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2561 | } |
| 2562 | |
| 2563 | |
| 2564 | void MacroAssembler::JumpToExternalReference(const ExternalReference& builtin) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2565 | #if defined(__thumb__) |
| 2566 | // Thumb mode builtin. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2567 | DCHECK((reinterpret_cast<intptr_t>(builtin.address()) & 1) == 1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2568 | #endif |
| 2569 | mov(r1, Operand(builtin)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2570 | CEntryStub stub(isolate(), 1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2571 | Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 2572 | } |
| 2573 | |
| 2574 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2575 | void MacroAssembler::SetCounter(StatsCounter* counter, int value, |
| 2576 | Register scratch1, Register scratch2) { |
| 2577 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2578 | mov(scratch1, Operand(value)); |
| 2579 | mov(scratch2, Operand(ExternalReference(counter))); |
| 2580 | str(scratch1, MemOperand(scratch2)); |
| 2581 | } |
| 2582 | } |
| 2583 | |
| 2584 | |
| 2585 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value, |
| 2586 | Register scratch1, Register scratch2) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2587 | DCHECK(value > 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2588 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2589 | mov(scratch2, Operand(ExternalReference(counter))); |
| 2590 | ldr(scratch1, MemOperand(scratch2)); |
| 2591 | add(scratch1, scratch1, Operand(value)); |
| 2592 | str(scratch1, MemOperand(scratch2)); |
| 2593 | } |
| 2594 | } |
| 2595 | |
| 2596 | |
| 2597 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value, |
| 2598 | Register scratch1, Register scratch2) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2599 | DCHECK(value > 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2600 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2601 | mov(scratch2, Operand(ExternalReference(counter))); |
| 2602 | ldr(scratch1, MemOperand(scratch2)); |
| 2603 | sub(scratch1, scratch1, Operand(value)); |
| 2604 | str(scratch1, MemOperand(scratch2)); |
| 2605 | } |
| 2606 | } |
| 2607 | |
| 2608 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2609 | void MacroAssembler::Assert(Condition cond, BailoutReason reason) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2610 | if (emit_debug_code()) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2611 | Check(cond, reason); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 2612 | } |
| 2613 | |
| 2614 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2615 | void MacroAssembler::AssertFastElements(Register elements) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2616 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2617 | DCHECK(!elements.is(ip)); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2618 | Label ok; |
| 2619 | push(elements); |
| 2620 | ldr(elements, FieldMemOperand(elements, HeapObject::kMapOffset)); |
| 2621 | LoadRoot(ip, Heap::kFixedArrayMapRootIndex); |
| 2622 | cmp(elements, ip); |
| 2623 | b(eq, &ok); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2624 | LoadRoot(ip, Heap::kFixedDoubleArrayMapRootIndex); |
| 2625 | cmp(elements, ip); |
| 2626 | b(eq, &ok); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2627 | LoadRoot(ip, Heap::kFixedCOWArrayMapRootIndex); |
| 2628 | cmp(elements, ip); |
| 2629 | b(eq, &ok); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2630 | Abort(kJSObjectWithFastElementsMapHasSlowElements); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2631 | bind(&ok); |
| 2632 | pop(elements); |
| 2633 | } |
| 2634 | } |
| 2635 | |
| 2636 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2637 | void MacroAssembler::Check(Condition cond, BailoutReason reason) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2638 | Label L; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2639 | b(cond, &L); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2640 | Abort(reason); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2641 | // will not return here |
| 2642 | bind(&L); |
| 2643 | } |
| 2644 | |
| 2645 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2646 | void MacroAssembler::Abort(BailoutReason reason) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2647 | Label abort_start; |
| 2648 | bind(&abort_start); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2649 | #ifdef DEBUG |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2650 | const char* msg = GetBailoutReason(reason); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2651 | if (msg != NULL) { |
| 2652 | RecordComment("Abort message: "); |
| 2653 | RecordComment(msg); |
| 2654 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2655 | |
| 2656 | if (FLAG_trap_on_abort) { |
| 2657 | stop(msg); |
| 2658 | return; |
| 2659 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2660 | #endif |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2661 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2662 | mov(r0, Operand(Smi::FromInt(reason))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2663 | push(r0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2664 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2665 | // Disable stub call restrictions to always allow calls to abort. |
| 2666 | if (!has_frame_) { |
| 2667 | // We don't actually want to generate a pile of code for this, so just |
| 2668 | // claim there is a stack frame, without generating one. |
| 2669 | FrameScope scope(this, StackFrame::NONE); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 2670 | CallRuntime(Runtime::kAbort); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2671 | } else { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 2672 | CallRuntime(Runtime::kAbort); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2673 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2674 | // will not return here |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2675 | if (is_const_pool_blocked()) { |
| 2676 | // If the calling code cares about the exact number of |
| 2677 | // instructions generated, we insert padding here to keep the size |
| 2678 | // of the Abort macro constant. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2679 | static const int kExpectedAbortInstructions = 7; |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2680 | int abort_instructions = InstructionsGeneratedSince(&abort_start); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2681 | DCHECK(abort_instructions <= kExpectedAbortInstructions); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2682 | while (abort_instructions++ < kExpectedAbortInstructions) { |
| 2683 | nop(); |
| 2684 | } |
| 2685 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2686 | } |
| 2687 | |
| 2688 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2689 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 2690 | if (context_chain_length > 0) { |
| 2691 | // Move up the chain of contexts to the context containing the slot. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2692 | ldr(dst, MemOperand(cp, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2693 | for (int i = 1; i < context_chain_length; i++) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2694 | ldr(dst, MemOperand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2695 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2696 | } else { |
| 2697 | // Slot is in the current function context. Move it into the |
| 2698 | // destination register in case we store into it (the write barrier |
| 2699 | // cannot be allowed to destroy the context in esi). |
| 2700 | mov(dst, cp); |
| 2701 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2702 | } |
| 2703 | |
| 2704 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2705 | void MacroAssembler::LoadTransitionedArrayMapConditional( |
| 2706 | ElementsKind expected_kind, |
| 2707 | ElementsKind transitioned_kind, |
| 2708 | Register map_in_out, |
| 2709 | Register scratch, |
| 2710 | Label* no_map_match) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2711 | DCHECK(IsFastElementsKind(expected_kind)); |
| 2712 | DCHECK(IsFastElementsKind(transitioned_kind)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2713 | |
| 2714 | // 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] | 2715 | ldr(scratch, NativeContextMemOperand()); |
| 2716 | ldr(ip, ContextMemOperand(scratch, Context::ArrayMapIndex(expected_kind))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2717 | cmp(map_in_out, ip); |
| 2718 | b(ne, no_map_match); |
| 2719 | |
| 2720 | // Use the transitioned cached map. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2721 | ldr(map_in_out, |
| 2722 | ContextMemOperand(scratch, Context::ArrayMapIndex(transitioned_kind))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2723 | } |
| 2724 | |
| 2725 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2726 | void MacroAssembler::LoadNativeContextSlot(int index, Register dst) { |
| 2727 | ldr(dst, NativeContextMemOperand()); |
| 2728 | ldr(dst, ContextMemOperand(dst, index)); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2729 | } |
| 2730 | |
| 2731 | |
| 2732 | void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, |
| 2733 | Register map, |
| 2734 | Register scratch) { |
| 2735 | // Load the initial map. The global functions all have initial maps. |
| 2736 | ldr(map, FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2737 | if (emit_debug_code()) { |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2738 | Label ok, fail; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2739 | CheckMap(map, scratch, Heap::kMetaMapRootIndex, &fail, DO_SMI_CHECK); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2740 | b(&ok); |
| 2741 | bind(&fail); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2742 | Abort(kGlobalFunctionsMustHaveInitialMap); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2743 | bind(&ok); |
| 2744 | } |
| 2745 | } |
| 2746 | |
| 2747 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2748 | void MacroAssembler::JumpIfNotPowerOfTwoOrZero( |
| 2749 | Register reg, |
| 2750 | Register scratch, |
| 2751 | Label* not_power_of_two_or_zero) { |
| 2752 | sub(scratch, reg, Operand(1), SetCC); |
| 2753 | b(mi, not_power_of_two_or_zero); |
| 2754 | tst(scratch, reg); |
| 2755 | b(ne, not_power_of_two_or_zero); |
| 2756 | } |
| 2757 | |
| 2758 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2759 | void MacroAssembler::JumpIfNotPowerOfTwoOrZeroAndNeg( |
| 2760 | Register reg, |
| 2761 | Register scratch, |
| 2762 | Label* zero_and_neg, |
| 2763 | Label* not_power_of_two) { |
| 2764 | sub(scratch, reg, Operand(1), SetCC); |
| 2765 | b(mi, zero_and_neg); |
| 2766 | tst(scratch, reg); |
| 2767 | b(ne, not_power_of_two); |
| 2768 | } |
| 2769 | |
| 2770 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2771 | void MacroAssembler::JumpIfNotBothSmi(Register reg1, |
| 2772 | Register reg2, |
| 2773 | Label* on_not_both_smi) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2774 | STATIC_ASSERT(kSmiTag == 0); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2775 | tst(reg1, Operand(kSmiTagMask)); |
| 2776 | tst(reg2, Operand(kSmiTagMask), eq); |
| 2777 | b(ne, on_not_both_smi); |
| 2778 | } |
| 2779 | |
| 2780 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2781 | void MacroAssembler::UntagAndJumpIfSmi( |
| 2782 | Register dst, Register src, Label* smi_case) { |
| 2783 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2784 | SmiUntag(dst, src, SetCC); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2785 | b(cc, smi_case); // Shifter carry is not set for a smi. |
| 2786 | } |
| 2787 | |
| 2788 | |
| 2789 | void MacroAssembler::UntagAndJumpIfNotSmi( |
| 2790 | Register dst, Register src, Label* non_smi_case) { |
| 2791 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2792 | SmiUntag(dst, src, SetCC); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2793 | b(cs, non_smi_case); // Shifter carry is set for a non-smi. |
| 2794 | } |
| 2795 | |
| 2796 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2797 | void MacroAssembler::JumpIfEitherSmi(Register reg1, |
| 2798 | Register reg2, |
| 2799 | Label* on_either_smi) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2800 | STATIC_ASSERT(kSmiTag == 0); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2801 | tst(reg1, Operand(kSmiTagMask)); |
| 2802 | tst(reg2, Operand(kSmiTagMask), ne); |
| 2803 | b(eq, on_either_smi); |
| 2804 | } |
| 2805 | |
| 2806 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2807 | void MacroAssembler::AssertNotSmi(Register object) { |
| 2808 | if (emit_debug_code()) { |
| 2809 | STATIC_ASSERT(kSmiTag == 0); |
| 2810 | tst(object, Operand(kSmiTagMask)); |
| 2811 | Check(ne, kOperandIsASmi); |
| 2812 | } |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 2813 | } |
| 2814 | |
| 2815 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2816 | void MacroAssembler::AssertSmi(Register object) { |
| 2817 | if (emit_debug_code()) { |
| 2818 | STATIC_ASSERT(kSmiTag == 0); |
| 2819 | tst(object, Operand(kSmiTagMask)); |
| 2820 | Check(eq, kOperandIsNotSmi); |
| 2821 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2822 | } |
| 2823 | |
| 2824 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2825 | void MacroAssembler::AssertString(Register object) { |
| 2826 | if (emit_debug_code()) { |
| 2827 | STATIC_ASSERT(kSmiTag == 0); |
| 2828 | tst(object, Operand(kSmiTagMask)); |
| 2829 | Check(ne, kOperandIsASmiAndNotAString); |
| 2830 | push(object); |
| 2831 | ldr(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 2832 | CompareInstanceType(object, object, FIRST_NONSTRING_TYPE); |
| 2833 | pop(object); |
| 2834 | Check(lo, kOperandIsNotAString); |
| 2835 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2836 | } |
| 2837 | |
| 2838 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2839 | void MacroAssembler::AssertName(Register object) { |
| 2840 | if (emit_debug_code()) { |
| 2841 | STATIC_ASSERT(kSmiTag == 0); |
| 2842 | tst(object, Operand(kSmiTagMask)); |
| 2843 | Check(ne, kOperandIsASmiAndNotAName); |
| 2844 | push(object); |
| 2845 | ldr(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 2846 | CompareInstanceType(object, object, LAST_NAME_TYPE); |
| 2847 | pop(object); |
| 2848 | Check(le, kOperandIsNotAName); |
| 2849 | } |
| 2850 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2851 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2852 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2853 | void MacroAssembler::AssertFunction(Register object) { |
| 2854 | if (emit_debug_code()) { |
| 2855 | STATIC_ASSERT(kSmiTag == 0); |
| 2856 | tst(object, Operand(kSmiTagMask)); |
| 2857 | Check(ne, kOperandIsASmiAndNotAFunction); |
| 2858 | push(object); |
| 2859 | CompareObjectType(object, object, object, JS_FUNCTION_TYPE); |
| 2860 | pop(object); |
| 2861 | Check(eq, kOperandIsNotAFunction); |
| 2862 | } |
| 2863 | } |
| 2864 | |
| 2865 | |
| 2866 | void MacroAssembler::AssertBoundFunction(Register object) { |
| 2867 | if (emit_debug_code()) { |
| 2868 | STATIC_ASSERT(kSmiTag == 0); |
| 2869 | tst(object, Operand(kSmiTagMask)); |
| 2870 | Check(ne, kOperandIsASmiAndNotABoundFunction); |
| 2871 | push(object); |
| 2872 | CompareObjectType(object, object, object, JS_BOUND_FUNCTION_TYPE); |
| 2873 | pop(object); |
| 2874 | Check(eq, kOperandIsNotABoundFunction); |
| 2875 | } |
| 2876 | } |
| 2877 | |
| 2878 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 2879 | void MacroAssembler::AssertReceiver(Register object) { |
| 2880 | if (emit_debug_code()) { |
| 2881 | STATIC_ASSERT(kSmiTag == 0); |
| 2882 | tst(object, Operand(kSmiTagMask)); |
| 2883 | Check(ne, kOperandIsASmiAndNotAReceiver); |
| 2884 | push(object); |
| 2885 | STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
| 2886 | CompareObjectType(object, object, object, FIRST_JS_RECEIVER_TYPE); |
| 2887 | pop(object); |
| 2888 | Check(hs, kOperandIsNotAReceiver); |
| 2889 | } |
| 2890 | } |
| 2891 | |
| 2892 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2893 | void MacroAssembler::AssertUndefinedOrAllocationSite(Register object, |
| 2894 | Register scratch) { |
| 2895 | if (emit_debug_code()) { |
| 2896 | Label done_checking; |
| 2897 | AssertNotSmi(object); |
| 2898 | CompareRoot(object, Heap::kUndefinedValueRootIndex); |
| 2899 | b(eq, &done_checking); |
| 2900 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 2901 | CompareRoot(scratch, Heap::kAllocationSiteMapRootIndex); |
| 2902 | Assert(eq, kExpectedUndefinedOrCell); |
| 2903 | bind(&done_checking); |
| 2904 | } |
| 2905 | } |
| 2906 | |
| 2907 | |
| 2908 | void MacroAssembler::AssertIsRoot(Register reg, Heap::RootListIndex index) { |
| 2909 | if (emit_debug_code()) { |
| 2910 | CompareRoot(reg, index); |
| 2911 | Check(eq, kHeapNumberMapRegisterClobbered); |
| 2912 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2913 | } |
| 2914 | |
| 2915 | |
| 2916 | void MacroAssembler::JumpIfNotHeapNumber(Register object, |
| 2917 | Register heap_number_map, |
| 2918 | Register scratch, |
| 2919 | Label* on_not_heap_number) { |
| 2920 | ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2921 | AssertIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2922 | cmp(scratch, heap_number_map); |
| 2923 | b(ne, on_not_heap_number); |
| 2924 | } |
| 2925 | |
| 2926 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2927 | void MacroAssembler::JumpIfNonSmisNotBothSequentialOneByteStrings( |
| 2928 | Register first, Register second, Register scratch1, Register scratch2, |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2929 | Label* failure) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2930 | // Test that both first and second are sequential one-byte strings. |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2931 | // Assume that they are non-smis. |
| 2932 | ldr(scratch1, FieldMemOperand(first, HeapObject::kMapOffset)); |
| 2933 | ldr(scratch2, FieldMemOperand(second, HeapObject::kMapOffset)); |
| 2934 | ldrb(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); |
| 2935 | ldrb(scratch2, FieldMemOperand(scratch2, Map::kInstanceTypeOffset)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2936 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2937 | JumpIfBothInstanceTypesAreNotSequentialOneByte(scratch1, scratch2, scratch1, |
| 2938 | scratch2, failure); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2939 | } |
| 2940 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2941 | void MacroAssembler::JumpIfNotBothSequentialOneByteStrings(Register first, |
| 2942 | Register second, |
| 2943 | Register scratch1, |
| 2944 | Register scratch2, |
| 2945 | Label* failure) { |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2946 | // Check that neither is a smi. |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2947 | and_(scratch1, first, Operand(second)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2948 | JumpIfSmi(scratch1, failure); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2949 | JumpIfNonSmisNotBothSequentialOneByteStrings(first, second, scratch1, |
| 2950 | scratch2, failure); |
| 2951 | } |
| 2952 | |
| 2953 | |
| 2954 | void MacroAssembler::JumpIfNotUniqueNameInstanceType(Register reg, |
| 2955 | Label* not_unique_name) { |
| 2956 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| 2957 | Label succeed; |
| 2958 | tst(reg, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| 2959 | b(eq, &succeed); |
| 2960 | cmp(reg, Operand(SYMBOL_TYPE)); |
| 2961 | b(ne, not_unique_name); |
| 2962 | |
| 2963 | bind(&succeed); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2964 | } |
| 2965 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2966 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2967 | // Allocates a heap number or jumps to the need_gc label if the young space |
| 2968 | // is full and a scavenge is needed. |
| 2969 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 2970 | Register scratch1, |
| 2971 | Register scratch2, |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 2972 | Register heap_number_map, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2973 | Label* gc_required, |
| 2974 | TaggingMode tagging_mode, |
| 2975 | MutableMode mode) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2976 | // Allocate an object in the heap for the heap number and tag it as a heap |
| 2977 | // object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2978 | Allocate(HeapNumber::kSize, result, scratch1, scratch2, gc_required, |
| 2979 | tagging_mode == TAG_RESULT ? TAG_OBJECT : NO_ALLOCATION_FLAGS); |
| 2980 | |
| 2981 | Heap::RootListIndex map_index = mode == MUTABLE |
| 2982 | ? Heap::kMutableHeapNumberMapRootIndex |
| 2983 | : Heap::kHeapNumberMapRootIndex; |
| 2984 | AssertIsRoot(heap_number_map, map_index); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2985 | |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 2986 | // Store heap number map in the allocated object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2987 | if (tagging_mode == TAG_RESULT) { |
| 2988 | str(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset)); |
| 2989 | } else { |
| 2990 | str(heap_number_map, MemOperand(result, HeapObject::kMapOffset)); |
| 2991 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2992 | } |
| 2993 | |
| 2994 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 2995 | void MacroAssembler::AllocateHeapNumberWithValue(Register result, |
| 2996 | DwVfpRegister value, |
| 2997 | Register scratch1, |
| 2998 | Register scratch2, |
| 2999 | Register heap_number_map, |
| 3000 | Label* gc_required) { |
| 3001 | AllocateHeapNumber(result, scratch1, scratch2, heap_number_map, gc_required); |
| 3002 | sub(scratch1, result, Operand(kHeapObjectTag)); |
| 3003 | vstr(value, scratch1, HeapNumber::kValueOffset); |
| 3004 | } |
| 3005 | |
| 3006 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3007 | void MacroAssembler::AllocateJSValue(Register result, Register constructor, |
| 3008 | Register value, Register scratch1, |
| 3009 | Register scratch2, Label* gc_required) { |
| 3010 | DCHECK(!result.is(constructor)); |
| 3011 | DCHECK(!result.is(scratch1)); |
| 3012 | DCHECK(!result.is(scratch2)); |
| 3013 | DCHECK(!result.is(value)); |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 3014 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3015 | // Allocate JSValue in new space. |
| 3016 | Allocate(JSValue::kSize, result, scratch1, scratch2, gc_required, TAG_OBJECT); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3017 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3018 | // Initialize the JSValue. |
| 3019 | LoadGlobalFunctionInitialMap(constructor, scratch1, scratch2); |
| 3020 | str(scratch1, FieldMemOperand(result, HeapObject::kMapOffset)); |
| 3021 | LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex); |
| 3022 | str(scratch1, FieldMemOperand(result, JSObject::kPropertiesOffset)); |
| 3023 | str(scratch1, FieldMemOperand(result, JSObject::kElementsOffset)); |
| 3024 | str(value, FieldMemOperand(result, JSValue::kValueOffset)); |
| 3025 | STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize); |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 3026 | } |
| 3027 | |
| 3028 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3029 | void MacroAssembler::CopyBytes(Register src, |
| 3030 | Register dst, |
| 3031 | Register length, |
| 3032 | Register scratch) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3033 | Label align_loop_1, word_loop, byte_loop, byte_loop_1, done; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3034 | |
| 3035 | // Align src before copying in word size chunks. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3036 | cmp(length, Operand(kPointerSize)); |
| 3037 | b(le, &byte_loop); |
| 3038 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3039 | bind(&align_loop_1); |
| 3040 | tst(src, Operand(kPointerSize - 1)); |
| 3041 | b(eq, &word_loop); |
| 3042 | ldrb(scratch, MemOperand(src, 1, PostIndex)); |
| 3043 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3044 | sub(length, length, Operand(1), SetCC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3045 | b(&align_loop_1); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3046 | // Copy bytes in word size chunks. |
| 3047 | bind(&word_loop); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3048 | if (emit_debug_code()) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3049 | tst(src, Operand(kPointerSize - 1)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3050 | Assert(eq, kExpectingAlignmentForCopyBytes); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3051 | } |
| 3052 | cmp(length, Operand(kPointerSize)); |
| 3053 | b(lt, &byte_loop); |
| 3054 | ldr(scratch, MemOperand(src, kPointerSize, PostIndex)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3055 | if (CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) { |
| 3056 | str(scratch, MemOperand(dst, kPointerSize, PostIndex)); |
| 3057 | } else { |
| 3058 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3059 | mov(scratch, Operand(scratch, LSR, 8)); |
| 3060 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3061 | mov(scratch, Operand(scratch, LSR, 8)); |
| 3062 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3063 | mov(scratch, Operand(scratch, LSR, 8)); |
| 3064 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3065 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3066 | sub(length, length, Operand(kPointerSize)); |
| 3067 | b(&word_loop); |
| 3068 | |
| 3069 | // Copy the last bytes if any left. |
| 3070 | bind(&byte_loop); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3071 | cmp(length, Operand::Zero()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3072 | b(eq, &done); |
| 3073 | bind(&byte_loop_1); |
| 3074 | ldrb(scratch, MemOperand(src, 1, PostIndex)); |
| 3075 | strb(scratch, MemOperand(dst, 1, PostIndex)); |
| 3076 | sub(length, length, Operand(1), SetCC); |
| 3077 | b(ne, &byte_loop_1); |
| 3078 | bind(&done); |
| 3079 | } |
| 3080 | |
| 3081 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3082 | void MacroAssembler::InitializeFieldsWithFiller(Register current_address, |
| 3083 | Register end_address, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3084 | Register filler) { |
| 3085 | Label loop, entry; |
| 3086 | b(&entry); |
| 3087 | bind(&loop); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3088 | str(filler, MemOperand(current_address, kPointerSize, PostIndex)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3089 | bind(&entry); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3090 | cmp(current_address, end_address); |
| 3091 | b(lo, &loop); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3092 | } |
| 3093 | |
| 3094 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3095 | void MacroAssembler::CheckFor32DRegs(Register scratch) { |
| 3096 | mov(scratch, Operand(ExternalReference::cpu_features())); |
| 3097 | ldr(scratch, MemOperand(scratch)); |
| 3098 | tst(scratch, Operand(1u << VFP32DREGS)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3099 | } |
| 3100 | |
| 3101 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3102 | void MacroAssembler::SaveFPRegs(Register location, Register scratch) { |
| 3103 | CheckFor32DRegs(scratch); |
| 3104 | vstm(db_w, location, d16, d31, ne); |
| 3105 | sub(location, location, Operand(16 * kDoubleSize), LeaveCC, eq); |
| 3106 | vstm(db_w, location, d0, d15); |
| 3107 | } |
| 3108 | |
| 3109 | |
| 3110 | void MacroAssembler::RestoreFPRegs(Register location, Register scratch) { |
| 3111 | CheckFor32DRegs(scratch); |
| 3112 | vldm(ia_w, location, d0, d15); |
| 3113 | vldm(ia_w, location, d16, d31, ne); |
| 3114 | add(location, location, Operand(16 * kDoubleSize), LeaveCC, eq); |
| 3115 | } |
| 3116 | |
| 3117 | |
| 3118 | void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialOneByte( |
| 3119 | Register first, Register second, Register scratch1, Register scratch2, |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3120 | Label* failure) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3121 | const int kFlatOneByteStringMask = |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3122 | kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3123 | const int kFlatOneByteStringTag = |
| 3124 | kStringTag | kOneByteStringTag | kSeqStringTag; |
| 3125 | and_(scratch1, first, Operand(kFlatOneByteStringMask)); |
| 3126 | and_(scratch2, second, Operand(kFlatOneByteStringMask)); |
| 3127 | cmp(scratch1, Operand(kFlatOneByteStringTag)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3128 | // Ignore second test if first test failed. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3129 | cmp(scratch2, Operand(kFlatOneByteStringTag), eq); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3130 | b(ne, failure); |
| 3131 | } |
| 3132 | |
| 3133 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3134 | void MacroAssembler::JumpIfInstanceTypeIsNotSequentialOneByte(Register type, |
| 3135 | Register scratch, |
| 3136 | Label* failure) { |
| 3137 | const int kFlatOneByteStringMask = |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3138 | kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3139 | const int kFlatOneByteStringTag = |
| 3140 | kStringTag | kOneByteStringTag | kSeqStringTag; |
| 3141 | and_(scratch, type, Operand(kFlatOneByteStringMask)); |
| 3142 | cmp(scratch, Operand(kFlatOneByteStringTag)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3143 | b(ne, failure); |
| 3144 | } |
| 3145 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3146 | static const int kRegisterPassedArguments = 4; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3147 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3148 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3149 | int MacroAssembler::CalculateStackPassedWords(int num_reg_arguments, |
| 3150 | int num_double_arguments) { |
| 3151 | int stack_passed_words = 0; |
| 3152 | if (use_eabi_hardfloat()) { |
| 3153 | // In the hard floating point calling convention, we can use |
| 3154 | // all double registers to pass doubles. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3155 | if (num_double_arguments > DoubleRegister::NumRegisters()) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3156 | stack_passed_words += |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3157 | 2 * (num_double_arguments - DoubleRegister::NumRegisters()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3158 | } |
| 3159 | } else { |
| 3160 | // In the soft floating point calling convention, every double |
| 3161 | // argument is passed using two registers. |
| 3162 | num_reg_arguments += 2 * num_double_arguments; |
| 3163 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3164 | // Up to four simple arguments are passed in registers r0..r3. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3165 | if (num_reg_arguments > kRegisterPassedArguments) { |
| 3166 | stack_passed_words += num_reg_arguments - kRegisterPassedArguments; |
| 3167 | } |
| 3168 | return stack_passed_words; |
| 3169 | } |
| 3170 | |
| 3171 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3172 | void MacroAssembler::EmitSeqStringSetCharCheck(Register string, |
| 3173 | Register index, |
| 3174 | Register value, |
| 3175 | uint32_t encoding_mask) { |
| 3176 | Label is_object; |
| 3177 | SmiTst(string); |
| 3178 | Check(ne, kNonObject); |
| 3179 | |
| 3180 | ldr(ip, FieldMemOperand(string, HeapObject::kMapOffset)); |
| 3181 | ldrb(ip, FieldMemOperand(ip, Map::kInstanceTypeOffset)); |
| 3182 | |
| 3183 | and_(ip, ip, Operand(kStringRepresentationMask | kStringEncodingMask)); |
| 3184 | cmp(ip, Operand(encoding_mask)); |
| 3185 | Check(eq, kUnexpectedStringType); |
| 3186 | |
| 3187 | // The index is assumed to be untagged coming in, tag it to compare with the |
| 3188 | // string length without using a temp register, it is restored at the end of |
| 3189 | // this function. |
| 3190 | Label index_tag_ok, index_tag_bad; |
| 3191 | TrySmiTag(index, index, &index_tag_bad); |
| 3192 | b(&index_tag_ok); |
| 3193 | bind(&index_tag_bad); |
| 3194 | Abort(kIndexIsTooLarge); |
| 3195 | bind(&index_tag_ok); |
| 3196 | |
| 3197 | ldr(ip, FieldMemOperand(string, String::kLengthOffset)); |
| 3198 | cmp(index, ip); |
| 3199 | Check(lt, kIndexIsTooLarge); |
| 3200 | |
| 3201 | cmp(index, Operand(Smi::FromInt(0))); |
| 3202 | Check(ge, kIndexIsNegative); |
| 3203 | |
| 3204 | SmiUntag(index, index); |
| 3205 | } |
| 3206 | |
| 3207 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3208 | void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| 3209 | int num_double_arguments, |
| 3210 | Register scratch) { |
| 3211 | int frame_alignment = ActivationFrameAlignment(); |
| 3212 | int stack_passed_arguments = CalculateStackPassedWords( |
| 3213 | num_reg_arguments, num_double_arguments); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3214 | if (frame_alignment > kPointerSize) { |
| 3215 | // Make stack end at alignment and make room for num_arguments - 4 words |
| 3216 | // and the original value of sp. |
| 3217 | mov(scratch, sp); |
| 3218 | sub(sp, sp, Operand((stack_passed_arguments + 1) * kPointerSize)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3219 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3220 | and_(sp, sp, Operand(-frame_alignment)); |
| 3221 | str(scratch, MemOperand(sp, stack_passed_arguments * kPointerSize)); |
| 3222 | } else { |
| 3223 | sub(sp, sp, Operand(stack_passed_arguments * kPointerSize)); |
| 3224 | } |
| 3225 | } |
| 3226 | |
| 3227 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3228 | void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| 3229 | Register scratch) { |
| 3230 | PrepareCallCFunction(num_reg_arguments, 0, scratch); |
| 3231 | } |
| 3232 | |
| 3233 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3234 | void MacroAssembler::MovToFloatParameter(DwVfpRegister src) { |
| 3235 | DCHECK(src.is(d0)); |
| 3236 | if (!use_eabi_hardfloat()) { |
| 3237 | vmov(r0, r1, src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3238 | } |
| 3239 | } |
| 3240 | |
| 3241 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3242 | // On ARM this is just a synonym to make the purpose clear. |
| 3243 | void MacroAssembler::MovToFloatResult(DwVfpRegister src) { |
| 3244 | MovToFloatParameter(src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3245 | } |
| 3246 | |
| 3247 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3248 | void MacroAssembler::MovToFloatParameters(DwVfpRegister src1, |
| 3249 | DwVfpRegister src2) { |
| 3250 | DCHECK(src1.is(d0)); |
| 3251 | DCHECK(src2.is(d1)); |
| 3252 | if (!use_eabi_hardfloat()) { |
| 3253 | vmov(r0, r1, src1); |
| 3254 | vmov(r2, r3, src2); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3255 | } |
| 3256 | } |
| 3257 | |
| 3258 | |
| 3259 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 3260 | int num_reg_arguments, |
| 3261 | int num_double_arguments) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3262 | mov(ip, Operand(function)); |
| 3263 | CallCFunctionHelper(ip, num_reg_arguments, num_double_arguments); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3264 | } |
| 3265 | |
| 3266 | |
| 3267 | void MacroAssembler::CallCFunction(Register function, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3268 | int num_reg_arguments, |
| 3269 | int num_double_arguments) { |
| 3270 | CallCFunctionHelper(function, num_reg_arguments, num_double_arguments); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3271 | } |
| 3272 | |
| 3273 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3274 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 3275 | int num_arguments) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3276 | CallCFunction(function, num_arguments, 0); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3277 | } |
| 3278 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3279 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3280 | void MacroAssembler::CallCFunction(Register function, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3281 | int num_arguments) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3282 | CallCFunction(function, num_arguments, 0); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3283 | } |
| 3284 | |
| 3285 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3286 | void MacroAssembler::CallCFunctionHelper(Register function, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3287 | int num_reg_arguments, |
| 3288 | int num_double_arguments) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3289 | DCHECK(has_frame()); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3290 | // Make sure that the stack is aligned before calling a C function unless |
| 3291 | // running in the simulator. The simulator has its own alignment check which |
| 3292 | // provides more information. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3293 | #if V8_HOST_ARCH_ARM |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3294 | if (emit_debug_code()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3295 | int frame_alignment = base::OS::ActivationFrameAlignment(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3296 | int frame_alignment_mask = frame_alignment - 1; |
| 3297 | if (frame_alignment > kPointerSize) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3298 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3299 | Label alignment_as_expected; |
| 3300 | tst(sp, Operand(frame_alignment_mask)); |
| 3301 | b(eq, &alignment_as_expected); |
| 3302 | // Don't use Check here, as it will call Runtime_Abort possibly |
| 3303 | // re-entering here. |
| 3304 | stop("Unexpected alignment"); |
| 3305 | bind(&alignment_as_expected); |
| 3306 | } |
| 3307 | } |
| 3308 | #endif |
| 3309 | |
| 3310 | // Just call directly. The function called cannot cause a GC, or |
| 3311 | // allow preemption, so the return address in the link register |
| 3312 | // stays correct. |
| 3313 | Call(function); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3314 | int stack_passed_arguments = CalculateStackPassedWords( |
| 3315 | num_reg_arguments, num_double_arguments); |
| 3316 | if (ActivationFrameAlignment() > kPointerSize) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 3317 | ldr(sp, MemOperand(sp, stack_passed_arguments * kPointerSize)); |
| 3318 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3319 | add(sp, sp, Operand(stack_passed_arguments * kPointerSize)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3320 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3321 | } |
| 3322 | |
| 3323 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3324 | void MacroAssembler::CheckPageFlag( |
| 3325 | Register object, |
| 3326 | Register scratch, |
| 3327 | int mask, |
| 3328 | Condition cc, |
| 3329 | Label* condition_met) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 3330 | DCHECK(cc == eq || cc == ne); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3331 | Bfc(scratch, object, 0, kPageSizeBits); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3332 | ldr(scratch, MemOperand(scratch, MemoryChunk::kFlagsOffset)); |
| 3333 | tst(scratch, Operand(mask)); |
| 3334 | b(cc, condition_met); |
| 3335 | } |
| 3336 | |
| 3337 | |
| 3338 | void MacroAssembler::JumpIfBlack(Register object, |
| 3339 | Register scratch0, |
| 3340 | Register scratch1, |
| 3341 | Label* on_black) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3342 | HasColor(object, scratch0, scratch1, on_black, 1, 1); // kBlackBitPattern. |
| 3343 | DCHECK(strcmp(Marking::kBlackBitPattern, "11") == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3344 | } |
| 3345 | |
| 3346 | |
| 3347 | void MacroAssembler::HasColor(Register object, |
| 3348 | Register bitmap_scratch, |
| 3349 | Register mask_scratch, |
| 3350 | Label* has_color, |
| 3351 | int first_bit, |
| 3352 | int second_bit) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3353 | DCHECK(!AreAliased(object, bitmap_scratch, mask_scratch, no_reg)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3354 | |
| 3355 | GetMarkBits(object, bitmap_scratch, mask_scratch); |
| 3356 | |
| 3357 | Label other_color, word_boundary; |
| 3358 | ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 3359 | tst(ip, Operand(mask_scratch)); |
| 3360 | b(first_bit == 1 ? eq : ne, &other_color); |
| 3361 | // Shift left 1 by adding. |
| 3362 | add(mask_scratch, mask_scratch, Operand(mask_scratch), SetCC); |
| 3363 | b(eq, &word_boundary); |
| 3364 | tst(ip, Operand(mask_scratch)); |
| 3365 | b(second_bit == 1 ? ne : eq, has_color); |
| 3366 | jmp(&other_color); |
| 3367 | |
| 3368 | bind(&word_boundary); |
| 3369 | ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize + kPointerSize)); |
| 3370 | tst(ip, Operand(1)); |
| 3371 | b(second_bit == 1 ? ne : eq, has_color); |
| 3372 | bind(&other_color); |
| 3373 | } |
| 3374 | |
| 3375 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3376 | void MacroAssembler::GetMarkBits(Register addr_reg, |
| 3377 | Register bitmap_reg, |
| 3378 | Register mask_reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3379 | DCHECK(!AreAliased(addr_reg, bitmap_reg, mask_reg, no_reg)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3380 | and_(bitmap_reg, addr_reg, Operand(~Page::kPageAlignmentMask)); |
| 3381 | Ubfx(mask_reg, addr_reg, kPointerSizeLog2, Bitmap::kBitsPerCellLog2); |
| 3382 | const int kLowBits = kPointerSizeLog2 + Bitmap::kBitsPerCellLog2; |
| 3383 | Ubfx(ip, addr_reg, kLowBits, kPageSizeBits - kLowBits); |
| 3384 | add(bitmap_reg, bitmap_reg, Operand(ip, LSL, kPointerSizeLog2)); |
| 3385 | mov(ip, Operand(1)); |
| 3386 | mov(mask_reg, Operand(ip, LSL, mask_reg)); |
| 3387 | } |
| 3388 | |
| 3389 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3390 | void MacroAssembler::JumpIfWhite(Register value, Register bitmap_scratch, |
| 3391 | Register mask_scratch, Register load_scratch, |
| 3392 | Label* value_is_white) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3393 | DCHECK(!AreAliased(value, bitmap_scratch, mask_scratch, ip)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3394 | GetMarkBits(value, bitmap_scratch, mask_scratch); |
| 3395 | |
| 3396 | // 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] | 3397 | DCHECK(strcmp(Marking::kWhiteBitPattern, "00") == 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3398 | DCHECK(strcmp(Marking::kBlackBitPattern, "11") == 0); |
| 3399 | DCHECK(strcmp(Marking::kGreyBitPattern, "10") == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3400 | DCHECK(strcmp(Marking::kImpossibleBitPattern, "01") == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3401 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3402 | // Since both black and grey have a 1 in the first position and white does |
| 3403 | // not have a 1 there we only need to check one bit. |
| 3404 | ldr(load_scratch, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 3405 | tst(mask_scratch, load_scratch); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3406 | b(eq, value_is_white); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3407 | } |
| 3408 | |
| 3409 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3410 | void MacroAssembler::ClampUint8(Register output_reg, Register input_reg) { |
| 3411 | Usat(output_reg, 8, Operand(input_reg)); |
| 3412 | } |
| 3413 | |
| 3414 | |
| 3415 | void MacroAssembler::ClampDoubleToUint8(Register result_reg, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3416 | DwVfpRegister input_reg, |
| 3417 | LowDwVfpRegister double_scratch) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3418 | Label done; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3419 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3420 | // Handle inputs >= 255 (including +infinity). |
| 3421 | Vmov(double_scratch, 255.0, result_reg); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3422 | mov(result_reg, Operand(255)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3423 | VFPCompareAndSetFlags(input_reg, double_scratch); |
| 3424 | b(ge, &done); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3425 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3426 | // For inputs < 255 (including negative) vcvt_u32_f64 with round-to-nearest |
| 3427 | // rounding mode will provide the correct result. |
| 3428 | vcvt_u32_f64(double_scratch.low(), input_reg, kFPSCRRounding); |
| 3429 | vmov(result_reg, double_scratch.low()); |
| 3430 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3431 | bind(&done); |
| 3432 | } |
| 3433 | |
| 3434 | |
| 3435 | void MacroAssembler::LoadInstanceDescriptors(Register map, |
| 3436 | Register descriptors) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3437 | ldr(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset)); |
| 3438 | } |
| 3439 | |
| 3440 | |
| 3441 | void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { |
| 3442 | ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| 3443 | DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); |
| 3444 | } |
| 3445 | |
| 3446 | |
| 3447 | void MacroAssembler::EnumLength(Register dst, Register map) { |
| 3448 | STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); |
| 3449 | ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| 3450 | and_(dst, dst, Operand(Map::EnumLengthBits::kMask)); |
| 3451 | SmiTag(dst); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3452 | } |
| 3453 | |
| 3454 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3455 | void MacroAssembler::LoadAccessor(Register dst, Register holder, |
| 3456 | int accessor_index, |
| 3457 | AccessorComponent accessor) { |
| 3458 | ldr(dst, FieldMemOperand(holder, HeapObject::kMapOffset)); |
| 3459 | LoadInstanceDescriptors(dst, dst); |
| 3460 | ldr(dst, |
| 3461 | FieldMemOperand(dst, DescriptorArray::GetValueOffset(accessor_index))); |
| 3462 | int offset = accessor == ACCESSOR_GETTER ? AccessorPair::kGetterOffset |
| 3463 | : AccessorPair::kSetterOffset; |
| 3464 | ldr(dst, FieldMemOperand(dst, offset)); |
| 3465 | } |
| 3466 | |
| 3467 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 3468 | void MacroAssembler::CheckEnumCache(Label* call_runtime) { |
| 3469 | Register null_value = r5; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3470 | Register empty_fixed_array_value = r6; |
| 3471 | LoadRoot(empty_fixed_array_value, Heap::kEmptyFixedArrayRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3472 | Label next, start; |
| 3473 | mov(r2, r0); |
| 3474 | |
| 3475 | // Check if the enum length field is properly initialized, indicating that |
| 3476 | // there is an enum cache. |
| 3477 | ldr(r1, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| 3478 | |
| 3479 | EnumLength(r3, r1); |
| 3480 | cmp(r3, Operand(Smi::FromInt(kInvalidEnumCacheSentinel))); |
| 3481 | b(eq, call_runtime); |
| 3482 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 3483 | LoadRoot(null_value, Heap::kNullValueRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3484 | jmp(&start); |
| 3485 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3486 | bind(&next); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3487 | ldr(r1, FieldMemOperand(r2, HeapObject::kMapOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3488 | |
| 3489 | // For all objects but the receiver, check that the cache is empty. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3490 | EnumLength(r3, r1); |
| 3491 | cmp(r3, Operand(Smi::FromInt(0))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3492 | b(ne, call_runtime); |
| 3493 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3494 | bind(&start); |
| 3495 | |
| 3496 | // Check that there are no elements. Register r2 contains the current JS |
| 3497 | // object we've reached through the prototype chain. |
| 3498 | Label no_elements; |
| 3499 | ldr(r2, FieldMemOperand(r2, JSObject::kElementsOffset)); |
| 3500 | cmp(r2, empty_fixed_array_value); |
| 3501 | b(eq, &no_elements); |
| 3502 | |
| 3503 | // Second chance, the object may be using the empty slow element dictionary. |
| 3504 | CompareRoot(r2, Heap::kEmptySlowElementDictionaryRootIndex); |
| 3505 | b(ne, call_runtime); |
| 3506 | |
| 3507 | bind(&no_elements); |
| 3508 | ldr(r2, FieldMemOperand(r1, Map::kPrototypeOffset)); |
| 3509 | cmp(r2, null_value); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3510 | b(ne, &next); |
| 3511 | } |
| 3512 | |
| 3513 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3514 | void MacroAssembler::TestJSArrayForAllocationMemento( |
| 3515 | Register receiver_reg, |
| 3516 | Register scratch_reg, |
| 3517 | Label* no_memento_found) { |
| 3518 | ExternalReference new_space_start = |
| 3519 | ExternalReference::new_space_start(isolate()); |
| 3520 | ExternalReference new_space_allocation_top = |
| 3521 | ExternalReference::new_space_allocation_top_address(isolate()); |
| 3522 | add(scratch_reg, receiver_reg, |
| 3523 | Operand(JSArray::kSize + AllocationMemento::kSize - kHeapObjectTag)); |
| 3524 | cmp(scratch_reg, Operand(new_space_start)); |
| 3525 | b(lt, no_memento_found); |
| 3526 | mov(ip, Operand(new_space_allocation_top)); |
| 3527 | ldr(ip, MemOperand(ip)); |
| 3528 | cmp(scratch_reg, ip); |
| 3529 | b(gt, no_memento_found); |
| 3530 | ldr(scratch_reg, MemOperand(scratch_reg, -AllocationMemento::kSize)); |
| 3531 | cmp(scratch_reg, |
| 3532 | Operand(isolate()->factory()->allocation_memento_map())); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3533 | } |
| 3534 | |
| 3535 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3536 | Register GetRegisterThatIsNotOneOf(Register reg1, |
| 3537 | Register reg2, |
| 3538 | Register reg3, |
| 3539 | Register reg4, |
| 3540 | Register reg5, |
| 3541 | Register reg6) { |
| 3542 | RegList regs = 0; |
| 3543 | if (reg1.is_valid()) regs |= reg1.bit(); |
| 3544 | if (reg2.is_valid()) regs |= reg2.bit(); |
| 3545 | if (reg3.is_valid()) regs |= reg3.bit(); |
| 3546 | if (reg4.is_valid()) regs |= reg4.bit(); |
| 3547 | if (reg5.is_valid()) regs |= reg5.bit(); |
| 3548 | if (reg6.is_valid()) regs |= reg6.bit(); |
| 3549 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3550 | const RegisterConfiguration* config = |
| 3551 | RegisterConfiguration::ArchDefault(RegisterConfiguration::CRANKSHAFT); |
| 3552 | for (int i = 0; i < config->num_allocatable_general_registers(); ++i) { |
| 3553 | int code = config->GetAllocatableGeneralCode(i); |
| 3554 | Register candidate = Register::from_code(code); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3555 | if (regs & candidate.bit()) continue; |
| 3556 | return candidate; |
| 3557 | } |
| 3558 | UNREACHABLE(); |
| 3559 | return no_reg; |
| 3560 | } |
| 3561 | |
| 3562 | |
| 3563 | void MacroAssembler::JumpIfDictionaryInPrototypeChain( |
| 3564 | Register object, |
| 3565 | Register scratch0, |
| 3566 | Register scratch1, |
| 3567 | Label* found) { |
| 3568 | DCHECK(!scratch1.is(scratch0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3569 | Register current = scratch0; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3570 | Label loop_again, end; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3571 | |
| 3572 | // scratch contained elements pointer. |
| 3573 | mov(current, object); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3574 | ldr(current, FieldMemOperand(current, HeapObject::kMapOffset)); |
| 3575 | ldr(current, FieldMemOperand(current, Map::kPrototypeOffset)); |
| 3576 | CompareRoot(current, Heap::kNullValueRootIndex); |
| 3577 | b(eq, &end); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3578 | |
| 3579 | // Loop based on the map going up the prototype chain. |
| 3580 | bind(&loop_again); |
| 3581 | ldr(current, FieldMemOperand(current, HeapObject::kMapOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3582 | |
| 3583 | STATIC_ASSERT(JS_PROXY_TYPE < JS_OBJECT_TYPE); |
| 3584 | STATIC_ASSERT(JS_VALUE_TYPE < JS_OBJECT_TYPE); |
| 3585 | ldrb(scratch1, FieldMemOperand(current, Map::kInstanceTypeOffset)); |
| 3586 | cmp(scratch1, Operand(JS_OBJECT_TYPE)); |
| 3587 | b(lo, found); |
| 3588 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3589 | ldr(scratch1, FieldMemOperand(current, Map::kBitField2Offset)); |
| 3590 | DecodeField<Map::ElementsKindBits>(scratch1); |
| 3591 | cmp(scratch1, Operand(DICTIONARY_ELEMENTS)); |
| 3592 | b(eq, found); |
| 3593 | ldr(current, FieldMemOperand(current, Map::kPrototypeOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3594 | CompareRoot(current, Heap::kNullValueRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3595 | b(ne, &loop_again); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3596 | |
| 3597 | bind(&end); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3598 | } |
| 3599 | |
| 3600 | |
| 3601 | #ifdef DEBUG |
| 3602 | bool AreAliased(Register reg1, |
| 3603 | Register reg2, |
| 3604 | Register reg3, |
| 3605 | Register reg4, |
| 3606 | Register reg5, |
| 3607 | Register reg6, |
| 3608 | Register reg7, |
| 3609 | Register reg8) { |
| 3610 | int n_of_valid_regs = reg1.is_valid() + reg2.is_valid() + |
| 3611 | reg3.is_valid() + reg4.is_valid() + reg5.is_valid() + reg6.is_valid() + |
| 3612 | reg7.is_valid() + reg8.is_valid(); |
| 3613 | |
| 3614 | RegList regs = 0; |
| 3615 | if (reg1.is_valid()) regs |= reg1.bit(); |
| 3616 | if (reg2.is_valid()) regs |= reg2.bit(); |
| 3617 | if (reg3.is_valid()) regs |= reg3.bit(); |
| 3618 | if (reg4.is_valid()) regs |= reg4.bit(); |
| 3619 | if (reg5.is_valid()) regs |= reg5.bit(); |
| 3620 | if (reg6.is_valid()) regs |= reg6.bit(); |
| 3621 | if (reg7.is_valid()) regs |= reg7.bit(); |
| 3622 | if (reg8.is_valid()) regs |= reg8.bit(); |
| 3623 | int n_of_non_aliasing_regs = NumRegs(regs); |
| 3624 | |
| 3625 | return n_of_valid_regs != n_of_non_aliasing_regs; |
| 3626 | } |
| 3627 | #endif |
| 3628 | |
| 3629 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3630 | CodePatcher::CodePatcher(Isolate* isolate, byte* address, int instructions, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3631 | FlushICache flush_cache) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3632 | : address_(address), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3633 | size_(instructions * Assembler::kInstrSize), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3634 | masm_(isolate, address, size_ + Assembler::kGap, CodeObjectRequired::kNo), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3635 | flush_cache_(flush_cache) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3636 | // Create a new macro assembler pointing to the address of the code to patch. |
| 3637 | // The size is adjusted with kGap on order for the assembler to generate size |
| 3638 | // bytes of instructions without failing with buffer size constraints. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3639 | DCHECK(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3640 | } |
| 3641 | |
| 3642 | |
| 3643 | CodePatcher::~CodePatcher() { |
| 3644 | // Indicate that code has changed. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3645 | if (flush_cache_ == FLUSH) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3646 | Assembler::FlushICache(masm_.isolate(), address_, size_); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3647 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3648 | |
| 3649 | // Check that the code was patched as expected. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3650 | DCHECK(masm_.pc_ == address_ + size_); |
| 3651 | DCHECK(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3652 | } |
| 3653 | |
| 3654 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3655 | void CodePatcher::Emit(Instr instr) { |
| 3656 | masm()->emit(instr); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3657 | } |
| 3658 | |
| 3659 | |
| 3660 | void CodePatcher::Emit(Address addr) { |
| 3661 | masm()->emit(reinterpret_cast<Instr>(addr)); |
| 3662 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3663 | |
| 3664 | |
| 3665 | void CodePatcher::EmitCondition(Condition cond) { |
| 3666 | Instr instr = Assembler::instr_at(masm_.pc_); |
| 3667 | instr = (instr & ~kCondMask) | cond; |
| 3668 | masm_.emit(instr); |
| 3669 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 3670 | |
| 3671 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3672 | void MacroAssembler::TruncatingDiv(Register result, |
| 3673 | Register dividend, |
| 3674 | int32_t divisor) { |
| 3675 | DCHECK(!dividend.is(result)); |
| 3676 | DCHECK(!dividend.is(ip)); |
| 3677 | DCHECK(!result.is(ip)); |
| 3678 | base::MagicNumbersForDivision<uint32_t> mag = |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3679 | base::SignedDivisionByConstant(bit_cast<uint32_t>(divisor)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3680 | mov(ip, Operand(mag.multiplier)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3681 | bool neg = (mag.multiplier & (1U << 31)) != 0; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3682 | if (divisor > 0 && neg) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3683 | smmla(result, dividend, ip, dividend); |
| 3684 | } else { |
| 3685 | smmul(result, dividend, ip); |
| 3686 | if (divisor < 0 && !neg && mag.multiplier > 0) { |
| 3687 | sub(result, result, Operand(dividend)); |
| 3688 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3689 | } |
| 3690 | if (mag.shift > 0) mov(result, Operand(result, ASR, mag.shift)); |
| 3691 | add(result, result, Operand(dividend, LSR, 31)); |
| 3692 | } |
| 3693 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3694 | } // namespace internal |
| 3695 | } // namespace v8 |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 3696 | |
| 3697 | #endif // V8_TARGET_ARCH_ARM |