Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5 | #include "src/x64/codegen-x64.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 6 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 7 | #if V8_TARGET_ARCH_X64 |
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/codegen.h" |
| 10 | #include "src/macro-assembler.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 11 | |
| 12 | namespace v8 { |
| 13 | namespace internal { |
| 14 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 15 | // ------------------------------------------------------------------------- |
| 16 | // Platform-specific RuntimeCallHelper functions. |
| 17 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 18 | void StubRuntimeCallHelper::BeforeCall(MacroAssembler* masm) const { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 19 | masm->EnterFrame(StackFrame::INTERNAL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 20 | DCHECK(!masm->has_frame()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 21 | masm->set_has_frame(true); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 22 | } |
| 23 | |
| 24 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 25 | void StubRuntimeCallHelper::AfterCall(MacroAssembler* masm) const { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 26 | masm->LeaveFrame(StackFrame::INTERNAL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 27 | DCHECK(masm->has_frame()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 28 | masm->set_has_frame(false); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 29 | } |
| 30 | |
| 31 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 32 | #define __ masm. |
| 33 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 34 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 35 | UnaryMathFunctionWithIsolate CreateSqrtFunction(Isolate* isolate) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 36 | size_t actual_size; |
| 37 | // Allocate buffer in executable space. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 38 | byte* buffer = |
| 39 | static_cast<byte*>(base::OS::Allocate(1 * KB, &actual_size, true)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 40 | if (buffer == nullptr) return nullptr; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 41 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 42 | MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size), |
| 43 | CodeObjectRequired::kNo); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 44 | // xmm0: raw double input. |
| 45 | // Move double input into registers. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 46 | __ Sqrtsd(xmm0, xmm0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 47 | __ Ret(); |
| 48 | |
| 49 | CodeDesc desc; |
| 50 | masm.GetCode(&desc); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 51 | DCHECK(!RelocInfo::RequiresRelocation(desc)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 52 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 53 | Assembler::FlushICache(isolate, buffer, actual_size); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 54 | base::OS::ProtectCode(buffer, actual_size); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 55 | return FUNCTION_CAST<UnaryMathFunctionWithIsolate>(buffer); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 56 | } |
| 57 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 58 | #undef __ |
| 59 | |
| 60 | // ------------------------------------------------------------------------- |
| 61 | // Code generators |
| 62 | |
| 63 | #define __ ACCESS_MASM(masm) |
| 64 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 65 | void ElementsTransitionGenerator::GenerateMapChangeElementsTransition( |
| 66 | MacroAssembler* masm, |
| 67 | Register receiver, |
| 68 | Register key, |
| 69 | Register value, |
| 70 | Register target_map, |
| 71 | AllocationSiteMode mode, |
| 72 | Label* allocation_memento_found) { |
| 73 | // Return address is on the stack. |
| 74 | Register scratch = rdi; |
| 75 | DCHECK(!AreAliased(receiver, key, value, target_map, scratch)); |
| 76 | |
| 77 | if (mode == TRACK_ALLOCATION_SITE) { |
| 78 | DCHECK(allocation_memento_found != NULL); |
| 79 | __ JumpIfJSArrayHasAllocationMemento( |
| 80 | receiver, scratch, allocation_memento_found); |
| 81 | } |
| 82 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 83 | // Set transitioned map. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 84 | __ movp(FieldOperand(receiver, HeapObject::kMapOffset), target_map); |
| 85 | __ RecordWriteField(receiver, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 86 | HeapObject::kMapOffset, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 87 | target_map, |
| 88 | scratch, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 89 | kDontSaveFPRegs, |
| 90 | EMIT_REMEMBERED_SET, |
| 91 | OMIT_SMI_CHECK); |
| 92 | } |
| 93 | |
| 94 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 95 | void ElementsTransitionGenerator::GenerateSmiToDouble( |
| 96 | MacroAssembler* masm, |
| 97 | Register receiver, |
| 98 | Register key, |
| 99 | Register value, |
| 100 | Register target_map, |
| 101 | AllocationSiteMode mode, |
| 102 | Label* fail) { |
| 103 | // Return address is on the stack. |
| 104 | DCHECK(receiver.is(rdx)); |
| 105 | DCHECK(key.is(rcx)); |
| 106 | DCHECK(value.is(rax)); |
| 107 | DCHECK(target_map.is(rbx)); |
| 108 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 109 | // The fail label is not actually used since we do not allocate. |
| 110 | Label allocated, new_backing_store, only_change_map, done; |
| 111 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 112 | if (mode == TRACK_ALLOCATION_SITE) { |
| 113 | __ JumpIfJSArrayHasAllocationMemento(rdx, rdi, fail); |
| 114 | } |
| 115 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 116 | // Check for empty arrays, which only require a map transition and no changes |
| 117 | // to the backing store. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 118 | __ movp(r8, FieldOperand(rdx, JSObject::kElementsOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 119 | __ CompareRoot(r8, Heap::kEmptyFixedArrayRootIndex); |
| 120 | __ j(equal, &only_change_map); |
| 121 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 122 | __ SmiToInteger32(r9, FieldOperand(r8, FixedDoubleArray::kLengthOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 123 | if (kPointerSize == kDoubleSize) { |
| 124 | // Check backing store for COW-ness. For COW arrays we have to |
| 125 | // allocate a new backing store. |
| 126 | __ CompareRoot(FieldOperand(r8, HeapObject::kMapOffset), |
| 127 | Heap::kFixedCOWArrayMapRootIndex); |
| 128 | __ j(equal, &new_backing_store); |
| 129 | } else { |
| 130 | // For x32 port we have to allocate a new backing store as SMI size is |
| 131 | // not equal with double size. |
| 132 | DCHECK(kDoubleSize == 2 * kPointerSize); |
| 133 | __ jmp(&new_backing_store); |
| 134 | } |
| 135 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 136 | // Check if the backing store is in new-space. If not, we need to allocate |
| 137 | // a new one since the old one is in pointer-space. |
| 138 | // If in new space, we can reuse the old backing store because it is |
| 139 | // the same size. |
| 140 | __ JumpIfNotInNewSpace(r8, rdi, &new_backing_store); |
| 141 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 142 | __ movp(r14, r8); // Destination array equals source array. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 143 | |
| 144 | // r8 : source FixedArray |
| 145 | // r9 : elements array length |
| 146 | // r14: destination FixedDoubleArray |
| 147 | // Set backing store's map |
| 148 | __ LoadRoot(rdi, Heap::kFixedDoubleArrayMapRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 149 | __ movp(FieldOperand(r14, HeapObject::kMapOffset), rdi); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 150 | |
| 151 | __ bind(&allocated); |
| 152 | // Set transitioned map. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 153 | __ movp(FieldOperand(rdx, HeapObject::kMapOffset), rbx); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 154 | __ RecordWriteField(rdx, |
| 155 | HeapObject::kMapOffset, |
| 156 | rbx, |
| 157 | rdi, |
| 158 | kDontSaveFPRegs, |
| 159 | EMIT_REMEMBERED_SET, |
| 160 | OMIT_SMI_CHECK); |
| 161 | |
| 162 | // Convert smis to doubles and holes to hole NaNs. The Array's length |
| 163 | // remains unchanged. |
| 164 | STATIC_ASSERT(FixedDoubleArray::kLengthOffset == FixedArray::kLengthOffset); |
| 165 | STATIC_ASSERT(FixedDoubleArray::kHeaderSize == FixedArray::kHeaderSize); |
| 166 | |
| 167 | Label loop, entry, convert_hole; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 168 | __ movq(r15, bit_cast<int64_t, uint64_t>(kHoleNanInt64)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 169 | // r15: the-hole NaN |
| 170 | __ jmp(&entry); |
| 171 | |
| 172 | // Allocate new backing store. |
| 173 | __ bind(&new_backing_store); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 174 | __ leap(rdi, Operand(r9, times_8, FixedArray::kHeaderSize)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 175 | __ Allocate(rdi, r14, r11, r15, fail, NO_ALLOCATION_FLAGS); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 176 | // Set backing store's map |
| 177 | __ LoadRoot(rdi, Heap::kFixedDoubleArrayMapRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 178 | __ movp(FieldOperand(r14, HeapObject::kMapOffset), rdi); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 179 | // Set receiver's backing store. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 180 | __ movp(FieldOperand(rdx, JSObject::kElementsOffset), r14); |
| 181 | __ movp(r11, r14); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 182 | __ RecordWriteField(rdx, |
| 183 | JSObject::kElementsOffset, |
| 184 | r11, |
| 185 | r15, |
| 186 | kDontSaveFPRegs, |
| 187 | EMIT_REMEMBERED_SET, |
| 188 | OMIT_SMI_CHECK); |
| 189 | // Set backing store's length. |
| 190 | __ Integer32ToSmi(r11, r9); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 191 | __ movp(FieldOperand(r14, FixedDoubleArray::kLengthOffset), r11); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 192 | __ jmp(&allocated); |
| 193 | |
| 194 | __ bind(&only_change_map); |
| 195 | // Set transitioned map. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 196 | __ movp(FieldOperand(rdx, HeapObject::kMapOffset), rbx); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 197 | __ RecordWriteField(rdx, |
| 198 | HeapObject::kMapOffset, |
| 199 | rbx, |
| 200 | rdi, |
| 201 | kDontSaveFPRegs, |
| 202 | OMIT_REMEMBERED_SET, |
| 203 | OMIT_SMI_CHECK); |
| 204 | __ jmp(&done); |
| 205 | |
| 206 | // Conversion loop. |
| 207 | __ bind(&loop); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 208 | __ movp(rbx, |
| 209 | FieldOperand(r8, r9, times_pointer_size, FixedArray::kHeaderSize)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 210 | // r9 : current element's index |
| 211 | // rbx: current element (smi-tagged) |
| 212 | __ JumpIfNotSmi(rbx, &convert_hole); |
| 213 | __ SmiToInteger32(rbx, rbx); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 214 | __ Cvtlsi2sd(kScratchDoubleReg, rbx); |
| 215 | __ Movsd(FieldOperand(r14, r9, times_8, FixedDoubleArray::kHeaderSize), |
| 216 | kScratchDoubleReg); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 217 | __ jmp(&entry); |
| 218 | __ bind(&convert_hole); |
| 219 | |
| 220 | if (FLAG_debug_code) { |
| 221 | __ CompareRoot(rbx, Heap::kTheHoleValueRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 222 | __ Assert(equal, kObjectFoundInSmiOnlyArray); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | __ movq(FieldOperand(r14, r9, times_8, FixedDoubleArray::kHeaderSize), r15); |
| 226 | __ bind(&entry); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 227 | __ decp(r9); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 228 | __ j(not_sign, &loop); |
| 229 | |
| 230 | __ bind(&done); |
| 231 | } |
| 232 | |
| 233 | |
| 234 | void ElementsTransitionGenerator::GenerateDoubleToObject( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 235 | MacroAssembler* masm, |
| 236 | Register receiver, |
| 237 | Register key, |
| 238 | Register value, |
| 239 | Register target_map, |
| 240 | AllocationSiteMode mode, |
| 241 | Label* fail) { |
| 242 | // Return address is on the stack. |
| 243 | DCHECK(receiver.is(rdx)); |
| 244 | DCHECK(key.is(rcx)); |
| 245 | DCHECK(value.is(rax)); |
| 246 | DCHECK(target_map.is(rbx)); |
| 247 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 248 | Label loop, entry, convert_hole, gc_required, only_change_map; |
| 249 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 250 | if (mode == TRACK_ALLOCATION_SITE) { |
| 251 | __ JumpIfJSArrayHasAllocationMemento(rdx, rdi, fail); |
| 252 | } |
| 253 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 254 | // Check for empty arrays, which only require a map transition and no changes |
| 255 | // to the backing store. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 256 | __ movp(r8, FieldOperand(rdx, JSObject::kElementsOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 257 | __ CompareRoot(r8, Heap::kEmptyFixedArrayRootIndex); |
| 258 | __ j(equal, &only_change_map); |
| 259 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 260 | __ Push(rsi); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 261 | __ Push(rax); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 262 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 263 | __ movp(r8, FieldOperand(rdx, JSObject::kElementsOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 264 | __ SmiToInteger32(r9, FieldOperand(r8, FixedDoubleArray::kLengthOffset)); |
| 265 | // r8 : source FixedDoubleArray |
| 266 | // r9 : number of elements |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 267 | __ leap(rdi, Operand(r9, times_pointer_size, FixedArray::kHeaderSize)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 268 | __ Allocate(rdi, r11, r14, r15, &gc_required, NO_ALLOCATION_FLAGS); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 269 | // r11: destination FixedArray |
| 270 | __ LoadRoot(rdi, Heap::kFixedArrayMapRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 271 | __ movp(FieldOperand(r11, HeapObject::kMapOffset), rdi); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 272 | __ Integer32ToSmi(r14, r9); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 273 | __ movp(FieldOperand(r11, FixedArray::kLengthOffset), r14); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 274 | |
| 275 | // Prepare for conversion loop. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 276 | __ movq(rsi, bit_cast<int64_t, uint64_t>(kHoleNanInt64)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 277 | __ LoadRoot(rdi, Heap::kTheHoleValueRootIndex); |
| 278 | // rsi: the-hole NaN |
| 279 | // rdi: pointer to the-hole |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 280 | |
| 281 | // Allocating heap numbers in the loop below can fail and cause a jump to |
| 282 | // gc_required. We can't leave a partly initialized FixedArray behind, |
| 283 | // so pessimistically fill it with holes now. |
| 284 | Label initialization_loop, initialization_loop_entry; |
| 285 | __ jmp(&initialization_loop_entry, Label::kNear); |
| 286 | __ bind(&initialization_loop); |
| 287 | __ movp(FieldOperand(r11, r9, times_pointer_size, FixedArray::kHeaderSize), |
| 288 | rdi); |
| 289 | __ bind(&initialization_loop_entry); |
| 290 | __ decp(r9); |
| 291 | __ j(not_sign, &initialization_loop); |
| 292 | |
| 293 | __ SmiToInteger32(r9, FieldOperand(r8, FixedDoubleArray::kLengthOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 294 | __ jmp(&entry); |
| 295 | |
| 296 | // Call into runtime if GC is required. |
| 297 | __ bind(&gc_required); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 298 | __ Pop(rax); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 299 | __ Pop(rsi); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 300 | __ jmp(fail); |
| 301 | |
| 302 | // Box doubles into heap numbers. |
| 303 | __ bind(&loop); |
| 304 | __ movq(r14, FieldOperand(r8, |
| 305 | r9, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 306 | times_8, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 307 | FixedDoubleArray::kHeaderSize)); |
| 308 | // r9 : current element's index |
| 309 | // r14: current element |
| 310 | __ cmpq(r14, rsi); |
| 311 | __ j(equal, &convert_hole); |
| 312 | |
| 313 | // Non-hole double, copy value into a heap number. |
| 314 | __ AllocateHeapNumber(rax, r15, &gc_required); |
| 315 | // rax: new heap number |
| 316 | __ movq(FieldOperand(rax, HeapNumber::kValueOffset), r14); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 317 | __ movp(FieldOperand(r11, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 318 | r9, |
| 319 | times_pointer_size, |
| 320 | FixedArray::kHeaderSize), |
| 321 | rax); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 322 | __ movp(r15, r9); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 323 | __ RecordWriteArray(r11, |
| 324 | rax, |
| 325 | r15, |
| 326 | kDontSaveFPRegs, |
| 327 | EMIT_REMEMBERED_SET, |
| 328 | OMIT_SMI_CHECK); |
| 329 | __ jmp(&entry, Label::kNear); |
| 330 | |
| 331 | // Replace the-hole NaN with the-hole pointer. |
| 332 | __ bind(&convert_hole); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 333 | __ movp(FieldOperand(r11, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 334 | r9, |
| 335 | times_pointer_size, |
| 336 | FixedArray::kHeaderSize), |
| 337 | rdi); |
| 338 | |
| 339 | __ bind(&entry); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 340 | __ decp(r9); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 341 | __ j(not_sign, &loop); |
| 342 | |
| 343 | // Replace receiver's backing store with newly created and filled FixedArray. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 344 | __ movp(FieldOperand(rdx, JSObject::kElementsOffset), r11); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 345 | __ RecordWriteField(rdx, |
| 346 | JSObject::kElementsOffset, |
| 347 | r11, |
| 348 | r15, |
| 349 | kDontSaveFPRegs, |
| 350 | EMIT_REMEMBERED_SET, |
| 351 | OMIT_SMI_CHECK); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 352 | __ Pop(rax); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 353 | __ Pop(rsi); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 354 | |
| 355 | __ bind(&only_change_map); |
| 356 | // Set transitioned map. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 357 | __ movp(FieldOperand(rdx, HeapObject::kMapOffset), rbx); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 358 | __ RecordWriteField(rdx, |
| 359 | HeapObject::kMapOffset, |
| 360 | rbx, |
| 361 | rdi, |
| 362 | kDontSaveFPRegs, |
| 363 | OMIT_REMEMBERED_SET, |
| 364 | OMIT_SMI_CHECK); |
| 365 | } |
| 366 | |
| 367 | |
| 368 | void StringCharLoadGenerator::Generate(MacroAssembler* masm, |
| 369 | Register string, |
| 370 | Register index, |
| 371 | Register result, |
| 372 | Label* call_runtime) { |
| 373 | // Fetch the instance type of the receiver into result register. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 374 | __ movp(result, FieldOperand(string, HeapObject::kMapOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 375 | __ movzxbl(result, FieldOperand(result, Map::kInstanceTypeOffset)); |
| 376 | |
| 377 | // We need special handling for indirect strings. |
| 378 | Label check_sequential; |
| 379 | __ testb(result, Immediate(kIsIndirectStringMask)); |
| 380 | __ j(zero, &check_sequential, Label::kNear); |
| 381 | |
| 382 | // Dispatch on the indirect string shape: slice or cons. |
| 383 | Label cons_string; |
| 384 | __ testb(result, Immediate(kSlicedNotConsMask)); |
| 385 | __ j(zero, &cons_string, Label::kNear); |
| 386 | |
| 387 | // Handle slices. |
| 388 | Label indirect_string_loaded; |
| 389 | __ SmiToInteger32(result, FieldOperand(string, SlicedString::kOffsetOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 390 | __ addp(index, result); |
| 391 | __ movp(string, FieldOperand(string, SlicedString::kParentOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 392 | __ jmp(&indirect_string_loaded, Label::kNear); |
| 393 | |
| 394 | // Handle cons strings. |
| 395 | // Check whether the right hand side is the empty string (i.e. if |
| 396 | // this is really a flat string in a cons string). If that is not |
| 397 | // the case we would rather go to the runtime system now to flatten |
| 398 | // the string. |
| 399 | __ bind(&cons_string); |
| 400 | __ CompareRoot(FieldOperand(string, ConsString::kSecondOffset), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 401 | Heap::kempty_stringRootIndex); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 402 | __ j(not_equal, call_runtime); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 403 | __ movp(string, FieldOperand(string, ConsString::kFirstOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 404 | |
| 405 | __ bind(&indirect_string_loaded); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 406 | __ movp(result, FieldOperand(string, HeapObject::kMapOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 407 | __ movzxbl(result, FieldOperand(result, Map::kInstanceTypeOffset)); |
| 408 | |
| 409 | // Distinguish sequential and external strings. Only these two string |
| 410 | // representations can reach here (slices and flat cons strings have been |
| 411 | // reduced to the underlying sequential or external string). |
| 412 | Label seq_string; |
| 413 | __ bind(&check_sequential); |
| 414 | STATIC_ASSERT(kSeqStringTag == 0); |
| 415 | __ testb(result, Immediate(kStringRepresentationMask)); |
| 416 | __ j(zero, &seq_string, Label::kNear); |
| 417 | |
| 418 | // Handle external strings. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 419 | Label one_byte_external, done; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 420 | if (FLAG_debug_code) { |
| 421 | // Assert that we do not have a cons or slice (indirect strings) here. |
| 422 | // Sequential strings have already been ruled out. |
| 423 | __ testb(result, Immediate(kIsIndirectStringMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 424 | __ Assert(zero, kExternalStringExpectedButNotFound); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 425 | } |
| 426 | // Rule out short external strings. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 427 | STATIC_ASSERT(kShortExternalStringTag != 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 428 | __ testb(result, Immediate(kShortExternalStringTag)); |
| 429 | __ j(not_zero, call_runtime); |
| 430 | // Check encoding. |
| 431 | STATIC_ASSERT(kTwoByteStringTag == 0); |
| 432 | __ testb(result, Immediate(kStringEncodingMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 433 | __ movp(result, FieldOperand(string, ExternalString::kResourceDataOffset)); |
| 434 | __ j(not_equal, &one_byte_external, Label::kNear); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 435 | // Two-byte string. |
| 436 | __ movzxwl(result, Operand(result, index, times_2, 0)); |
| 437 | __ jmp(&done, Label::kNear); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 438 | __ bind(&one_byte_external); |
| 439 | // One-byte string. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 440 | __ movzxbl(result, Operand(result, index, times_1, 0)); |
| 441 | __ jmp(&done, Label::kNear); |
| 442 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 443 | // Dispatch on the encoding: one-byte or two-byte. |
| 444 | Label one_byte; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 445 | __ bind(&seq_string); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 446 | STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 447 | STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0); |
| 448 | __ testb(result, Immediate(kStringEncodingMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 449 | __ j(not_zero, &one_byte, Label::kNear); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 450 | |
| 451 | // Two-byte string. |
| 452 | // Load the two-byte character code into the result register. |
| 453 | STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| 454 | __ movzxwl(result, FieldOperand(string, |
| 455 | index, |
| 456 | times_2, |
| 457 | SeqTwoByteString::kHeaderSize)); |
| 458 | __ jmp(&done, Label::kNear); |
| 459 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 460 | // One-byte string. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 461 | // Load the byte into the result register. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 462 | __ bind(&one_byte); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 463 | __ movzxbl(result, FieldOperand(string, |
| 464 | index, |
| 465 | times_1, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 466 | SeqOneByteString::kHeaderSize)); |
| 467 | __ bind(&done); |
| 468 | } |
| 469 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 470 | #undef __ |
| 471 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 472 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 473 | CodeAgingHelper::CodeAgingHelper(Isolate* isolate) { |
| 474 | USE(isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 475 | DCHECK(young_sequence_.length() == kNoCodeAgeSequenceLength); |
| 476 | // The sequence of instructions that is patched out for aging code is the |
| 477 | // following boilerplate stack-building prologue that is found both in |
| 478 | // FUNCTION and OPTIMIZED_FUNCTION code: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 479 | CodePatcher patcher(isolate, young_sequence_.start(), |
| 480 | young_sequence_.length()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 481 | patcher.masm()->pushq(rbp); |
| 482 | patcher.masm()->movp(rbp, rsp); |
| 483 | patcher.masm()->Push(rsi); |
| 484 | patcher.masm()->Push(rdi); |
| 485 | } |
| 486 | |
| 487 | |
| 488 | #ifdef DEBUG |
| 489 | bool CodeAgingHelper::IsOld(byte* candidate) const { |
| 490 | return *candidate == kCallOpcode; |
| 491 | } |
| 492 | #endif |
| 493 | |
| 494 | |
| 495 | bool Code::IsYoungSequence(Isolate* isolate, byte* sequence) { |
| 496 | bool result = isolate->code_aging_helper()->IsYoung(sequence); |
| 497 | DCHECK(result || isolate->code_aging_helper()->IsOld(sequence)); |
| 498 | return result; |
| 499 | } |
| 500 | |
| 501 | |
| 502 | void Code::GetCodeAgeAndParity(Isolate* isolate, byte* sequence, Age* age, |
| 503 | MarkingParity* parity) { |
| 504 | if (IsYoungSequence(isolate, sequence)) { |
| 505 | *age = kNoAgeCodeAge; |
| 506 | *parity = NO_MARKING_PARITY; |
| 507 | } else { |
| 508 | sequence++; // Skip the kCallOpcode byte |
| 509 | Address target_address = sequence + *reinterpret_cast<int*>(sequence) + |
| 510 | Assembler::kCallTargetAddressOffset; |
| 511 | Code* stub = GetCodeFromTargetAddress(target_address); |
| 512 | GetCodeAgeAndParity(stub, age, parity); |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | |
| 517 | void Code::PatchPlatformCodeAge(Isolate* isolate, |
| 518 | byte* sequence, |
| 519 | Code::Age age, |
| 520 | MarkingParity parity) { |
| 521 | uint32_t young_length = isolate->code_aging_helper()->young_sequence_length(); |
| 522 | if (age == kNoAgeCodeAge) { |
| 523 | isolate->code_aging_helper()->CopyYoungSequenceTo(sequence); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 524 | Assembler::FlushICache(isolate, sequence, young_length); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 525 | } else { |
| 526 | Code* stub = GetCodeAgeStub(isolate, age, parity); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 527 | CodePatcher patcher(isolate, sequence, young_length); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 528 | patcher.masm()->call(stub->instruction_start()); |
| 529 | patcher.masm()->Nop( |
| 530 | kNoCodeAgeSequenceLength - Assembler::kShortCallInstructionLength); |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | |
| 535 | Operand StackArgumentsAccessor::GetArgumentOperand(int index) { |
| 536 | DCHECK(index >= 0); |
| 537 | int receiver = (receiver_mode_ == ARGUMENTS_CONTAIN_RECEIVER) ? 1 : 0; |
| 538 | int displacement_to_last_argument = base_reg_.is(rsp) ? |
| 539 | kPCOnStackSize : kFPOnStackSize + kPCOnStackSize; |
| 540 | displacement_to_last_argument += extra_displacement_to_last_argument_; |
| 541 | if (argument_count_reg_.is(no_reg)) { |
| 542 | // argument[0] is at base_reg_ + displacement_to_last_argument + |
| 543 | // (argument_count_immediate_ + receiver - 1) * kPointerSize. |
| 544 | DCHECK(argument_count_immediate_ + receiver > 0); |
| 545 | return Operand(base_reg_, displacement_to_last_argument + |
| 546 | (argument_count_immediate_ + receiver - 1 - index) * kPointerSize); |
| 547 | } else { |
| 548 | // argument[0] is at base_reg_ + displacement_to_last_argument + |
| 549 | // argument_count_reg_ * times_pointer_size + (receiver - 1) * kPointerSize. |
| 550 | return Operand(base_reg_, argument_count_reg_, times_pointer_size, |
| 551 | displacement_to_last_argument + (receiver - 1 - index) * kPointerSize); |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 556 | } // namespace internal |
| 557 | } // namespace v8 |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 558 | |
| 559 | #endif // V8_TARGET_ARCH_X64 |