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 | |
| 5 | #ifndef V8_X64_MACRO_ASSEMBLER_X64_H_ |
| 6 | #define V8_X64_MACRO_ASSEMBLER_X64_H_ |
| 7 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 8 | #include "src/assembler.h" |
| 9 | #include "src/bailout-reason.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 10 | #include "src/base/flags.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 11 | #include "src/frames.h" |
| 12 | #include "src/globals.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 13 | #include "src/x64/frames-x64.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 14 | |
| 15 | namespace v8 { |
| 16 | namespace internal { |
| 17 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 18 | // Give alias names to registers for calling conventions. |
| 19 | const Register kReturnRegister0 = {Register::kCode_rax}; |
| 20 | const Register kReturnRegister1 = {Register::kCode_rdx}; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 21 | const Register kReturnRegister2 = {Register::kCode_r8}; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 22 | const Register kJSFunctionRegister = {Register::kCode_rdi}; |
| 23 | const Register kContextRegister = {Register::kCode_rsi}; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 24 | const Register kAllocateSizeRegister = {Register::kCode_rdx}; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 25 | const Register kInterpreterAccumulatorRegister = {Register::kCode_rax}; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 26 | const Register kInterpreterBytecodeOffsetRegister = {Register::kCode_r12}; |
| 27 | const Register kInterpreterBytecodeArrayRegister = {Register::kCode_r14}; |
| 28 | const Register kInterpreterDispatchTableRegister = {Register::kCode_r15}; |
| 29 | const Register kJavaScriptCallArgCountRegister = {Register::kCode_rax}; |
| 30 | const Register kJavaScriptCallNewTargetRegister = {Register::kCode_rdx}; |
| 31 | const Register kRuntimeCallFunctionRegister = {Register::kCode_rbx}; |
| 32 | const Register kRuntimeCallArgCountRegister = {Register::kCode_rax}; |
| 33 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 34 | // Default scratch register used by MacroAssembler (and other code that needs |
| 35 | // a spare register). The register isn't callee save, and not used by the |
| 36 | // function calling convention. |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame^] | 37 | const Register kScratchRegister = {10}; // r10. |
| 38 | const XMMRegister kScratchDoubleReg = {15}; // xmm15. |
| 39 | const Register kRootRegister = {13}; // r13 (callee save). |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 40 | // Actual value of root register is offset from the root array's start |
| 41 | // to take advantage of negitive 8-bit displacement values. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 42 | const int kRootRegisterBias = 128; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 43 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 44 | // Convenience for platform-independent signatures. |
| 45 | typedef Operand MemOperand; |
| 46 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 47 | enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET }; |
| 48 | enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK }; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 49 | enum PointersToHereCheck { |
| 50 | kPointersToHereMaybeInteresting, |
| 51 | kPointersToHereAreAlwaysInteresting |
| 52 | }; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 53 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 54 | enum class SmiOperationConstraint { |
| 55 | kPreserveSourceRegister = 1 << 0, |
| 56 | kBailoutOnNoOverflow = 1 << 1, |
| 57 | kBailoutOnOverflow = 1 << 2 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 58 | }; |
| 59 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 60 | enum class ReturnAddressState { kOnStack, kNotOnStack }; |
| 61 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 62 | typedef base::Flags<SmiOperationConstraint> SmiOperationConstraints; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 63 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 64 | DEFINE_OPERATORS_FOR_FLAGS(SmiOperationConstraints) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 65 | |
| 66 | #ifdef DEBUG |
| 67 | bool AreAliased(Register reg1, |
| 68 | Register reg2, |
| 69 | Register reg3 = no_reg, |
| 70 | Register reg4 = no_reg, |
| 71 | Register reg5 = no_reg, |
| 72 | Register reg6 = no_reg, |
| 73 | Register reg7 = no_reg, |
| 74 | Register reg8 = no_reg); |
| 75 | #endif |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 76 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 77 | // Forward declaration. |
| 78 | class JumpTarget; |
| 79 | |
| 80 | struct SmiIndex { |
| 81 | SmiIndex(Register index_register, ScaleFactor scale) |
| 82 | : reg(index_register), |
| 83 | scale(scale) {} |
| 84 | Register reg; |
| 85 | ScaleFactor scale; |
| 86 | }; |
| 87 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 88 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 89 | // MacroAssembler implements a collection of frequently used macros. |
| 90 | class MacroAssembler: public Assembler { |
| 91 | public: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 92 | MacroAssembler(Isolate* isolate, void* buffer, int size, |
| 93 | CodeObjectRequired create_code_object); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 94 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 95 | // Prevent the use of the RootArray during the lifetime of this |
| 96 | // scope object. |
| 97 | class NoRootArrayScope BASE_EMBEDDED { |
| 98 | public: |
| 99 | explicit NoRootArrayScope(MacroAssembler* assembler) |
| 100 | : variable_(&assembler->root_array_available_), |
| 101 | old_value_(assembler->root_array_available_) { |
| 102 | assembler->root_array_available_ = false; |
| 103 | } |
| 104 | ~NoRootArrayScope() { |
| 105 | *variable_ = old_value_; |
| 106 | } |
| 107 | private: |
| 108 | bool* variable_; |
| 109 | bool old_value_; |
| 110 | }; |
| 111 | |
| 112 | // Operand pointing to an external reference. |
| 113 | // May emit code to set up the scratch register. The operand is |
| 114 | // only guaranteed to be correct as long as the scratch register |
| 115 | // isn't changed. |
| 116 | // If the operand is used more than once, use a scratch register |
| 117 | // that is guaranteed not to be clobbered. |
| 118 | Operand ExternalOperand(ExternalReference reference, |
| 119 | Register scratch = kScratchRegister); |
| 120 | // Loads and stores the value of an external reference. |
| 121 | // Special case code for load and store to take advantage of |
| 122 | // load_rax/store_rax if possible/necessary. |
| 123 | // For other operations, just use: |
| 124 | // Operand operand = ExternalOperand(extref); |
| 125 | // operation(operand, ..); |
| 126 | void Load(Register destination, ExternalReference source); |
| 127 | void Store(ExternalReference destination, Register source); |
| 128 | // Loads the address of the external reference into the destination |
| 129 | // register. |
| 130 | void LoadAddress(Register destination, ExternalReference source); |
| 131 | // Returns the size of the code generated by LoadAddress. |
| 132 | // Used by CallSize(ExternalReference) to find the size of a call. |
| 133 | int LoadAddressSize(ExternalReference source); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 134 | // Pushes the address of the external reference onto the stack. |
| 135 | void PushAddress(ExternalReference source); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 136 | |
| 137 | // Operations on roots in the root-array. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 138 | void LoadRoot(Register destination, Heap::RootListIndex index); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 139 | void LoadRoot(const Operand& destination, Heap::RootListIndex index) { |
| 140 | LoadRoot(kScratchRegister, index); |
| 141 | movp(destination, kScratchRegister); |
| 142 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 143 | void StoreRoot(Register source, Heap::RootListIndex index); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 144 | // Load a root value where the index (or part of it) is variable. |
| 145 | // The variable_offset register is added to the fixed_offset value |
| 146 | // to get the index into the root-array. |
| 147 | void LoadRootIndexed(Register destination, |
| 148 | Register variable_offset, |
| 149 | int fixed_offset); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 150 | void CompareRoot(Register with, Heap::RootListIndex index); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 151 | void CompareRoot(const Operand& with, Heap::RootListIndex index); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 152 | void PushRoot(Heap::RootListIndex index); |
| 153 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 154 | // Compare the object in a register to a value and jump if they are equal. |
| 155 | void JumpIfRoot(Register with, Heap::RootListIndex index, Label* if_equal, |
| 156 | Label::Distance if_equal_distance = Label::kFar) { |
| 157 | CompareRoot(with, index); |
| 158 | j(equal, if_equal, if_equal_distance); |
| 159 | } |
| 160 | void JumpIfRoot(const Operand& with, Heap::RootListIndex index, |
| 161 | Label* if_equal, |
| 162 | Label::Distance if_equal_distance = Label::kFar) { |
| 163 | CompareRoot(with, index); |
| 164 | j(equal, if_equal, if_equal_distance); |
| 165 | } |
| 166 | |
| 167 | // Compare the object in a register to a value and jump if they are not equal. |
| 168 | void JumpIfNotRoot(Register with, Heap::RootListIndex index, |
| 169 | Label* if_not_equal, |
| 170 | Label::Distance if_not_equal_distance = Label::kFar) { |
| 171 | CompareRoot(with, index); |
| 172 | j(not_equal, if_not_equal, if_not_equal_distance); |
| 173 | } |
| 174 | void JumpIfNotRoot(const Operand& with, Heap::RootListIndex index, |
| 175 | Label* if_not_equal, |
| 176 | Label::Distance if_not_equal_distance = Label::kFar) { |
| 177 | CompareRoot(with, index); |
| 178 | j(not_equal, if_not_equal, if_not_equal_distance); |
| 179 | } |
| 180 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 181 | // These functions do not arrange the registers in any particular order so |
| 182 | // they are not useful for calls that can cause a GC. The caller can |
| 183 | // exclude up to 3 registers that do not need to be saved and restored. |
| 184 | void PushCallerSaved(SaveFPRegsMode fp_mode, |
| 185 | Register exclusion1 = no_reg, |
| 186 | Register exclusion2 = no_reg, |
| 187 | Register exclusion3 = no_reg); |
| 188 | void PopCallerSaved(SaveFPRegsMode fp_mode, |
| 189 | Register exclusion1 = no_reg, |
| 190 | Register exclusion2 = no_reg, |
| 191 | Register exclusion3 = no_reg); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 192 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 193 | // --------------------------------------------------------------------------- |
| 194 | // GC Support |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 195 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 196 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 197 | enum RememberedSetFinalAction { |
| 198 | kReturnAtEnd, |
| 199 | kFallThroughAtEnd |
| 200 | }; |
| 201 | |
| 202 | // Record in the remembered set the fact that we have a pointer to new space |
| 203 | // at the address pointed to by the addr register. Only works if addr is not |
| 204 | // in new space. |
| 205 | void RememberedSetHelper(Register object, // Used for debug code. |
| 206 | Register addr, |
| 207 | Register scratch, |
| 208 | SaveFPRegsMode save_fp, |
| 209 | RememberedSetFinalAction and_then); |
| 210 | |
| 211 | void CheckPageFlag(Register object, |
| 212 | Register scratch, |
| 213 | int mask, |
| 214 | Condition cc, |
| 215 | Label* condition_met, |
| 216 | Label::Distance condition_met_distance = Label::kFar); |
| 217 | |
| 218 | // Check if object is in new space. Jumps if the object is not in new space. |
| 219 | // The register scratch can be object itself, but scratch will be clobbered. |
| 220 | void JumpIfNotInNewSpace(Register object, |
| 221 | Register scratch, |
| 222 | Label* branch, |
| 223 | Label::Distance distance = Label::kFar) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 224 | InNewSpace(object, scratch, zero, branch, distance); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | // Check if object is in new space. Jumps if the object is in new space. |
| 228 | // The register scratch can be object itself, but it will be clobbered. |
| 229 | void JumpIfInNewSpace(Register object, |
| 230 | Register scratch, |
| 231 | Label* branch, |
| 232 | Label::Distance distance = Label::kFar) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 233 | InNewSpace(object, scratch, not_zero, branch, distance); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | // Check if an object has the black incremental marking color. Also uses rcx! |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 237 | void JumpIfBlack(Register object, Register bitmap_scratch, |
| 238 | Register mask_scratch, Label* on_black, |
| 239 | Label::Distance on_black_distance); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 240 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 241 | // Checks the color of an object. If the object is white we jump to the |
| 242 | // incremental marker. |
| 243 | void JumpIfWhite(Register value, Register scratch1, Register scratch2, |
| 244 | Label* value_is_white, Label::Distance distance); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 245 | |
| 246 | // Notify the garbage collector that we wrote a pointer into an object. |
| 247 | // |object| is the object being stored into, |value| is the object being |
| 248 | // stored. value and scratch registers are clobbered by the operation. |
| 249 | // The offset is the offset from the start of the object, not the offset from |
| 250 | // the tagged HeapObject pointer. For use with FieldOperand(reg, off). |
| 251 | void RecordWriteField( |
| 252 | Register object, |
| 253 | int offset, |
| 254 | Register value, |
| 255 | Register scratch, |
| 256 | SaveFPRegsMode save_fp, |
| 257 | RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 258 | SmiCheck smi_check = INLINE_SMI_CHECK, |
| 259 | PointersToHereCheck pointers_to_here_check_for_value = |
| 260 | kPointersToHereMaybeInteresting); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 261 | |
| 262 | // As above, but the offset has the tag presubtracted. For use with |
| 263 | // Operand(reg, off). |
| 264 | void RecordWriteContextSlot( |
| 265 | Register context, |
| 266 | int offset, |
| 267 | Register value, |
| 268 | Register scratch, |
| 269 | SaveFPRegsMode save_fp, |
| 270 | RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 271 | SmiCheck smi_check = INLINE_SMI_CHECK, |
| 272 | PointersToHereCheck pointers_to_here_check_for_value = |
| 273 | kPointersToHereMaybeInteresting) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 274 | RecordWriteField(context, |
| 275 | offset + kHeapObjectTag, |
| 276 | value, |
| 277 | scratch, |
| 278 | save_fp, |
| 279 | remembered_set_action, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 280 | smi_check, |
| 281 | pointers_to_here_check_for_value); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | // Notify the garbage collector that we wrote a pointer into a fixed array. |
| 285 | // |array| is the array being stored into, |value| is the |
| 286 | // object being stored. |index| is the array index represented as a non-smi. |
| 287 | // All registers are clobbered by the operation RecordWriteArray |
| 288 | // filters out smis so it does not update the write barrier if the |
| 289 | // value is a smi. |
| 290 | void RecordWriteArray( |
| 291 | Register array, |
| 292 | Register value, |
| 293 | Register index, |
| 294 | SaveFPRegsMode save_fp, |
| 295 | RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 296 | SmiCheck smi_check = INLINE_SMI_CHECK, |
| 297 | PointersToHereCheck pointers_to_here_check_for_value = |
| 298 | kPointersToHereMaybeInteresting); |
| 299 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 300 | // Notify the garbage collector that we wrote a code entry into a |
| 301 | // JSFunction. Only scratch is clobbered by the operation. |
| 302 | void RecordWriteCodeEntryField(Register js_function, Register code_entry, |
| 303 | Register scratch); |
| 304 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 305 | void RecordWriteForMap( |
| 306 | Register object, |
| 307 | Register map, |
| 308 | Register dst, |
| 309 | SaveFPRegsMode save_fp); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 310 | |
| 311 | // For page containing |object| mark region covering |address| |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 312 | // dirty. |object| is the object being stored into, |value| is the |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 313 | // object being stored. The address and value registers are clobbered by the |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 314 | // operation. RecordWrite filters out smis so it does not update |
| 315 | // the write barrier if the value is a smi. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 316 | void RecordWrite( |
| 317 | Register object, |
| 318 | Register address, |
| 319 | Register value, |
| 320 | SaveFPRegsMode save_fp, |
| 321 | RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 322 | SmiCheck smi_check = INLINE_SMI_CHECK, |
| 323 | PointersToHereCheck pointers_to_here_check_for_value = |
| 324 | kPointersToHereMaybeInteresting); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 325 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 326 | // --------------------------------------------------------------------------- |
| 327 | // Debugger Support |
| 328 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 329 | void DebugBreak(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 330 | |
| 331 | // Generates function and stub prologue code. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 332 | void StubPrologue(StackFrame::Type type); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 333 | void Prologue(bool code_pre_aging); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 334 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 335 | // Enter specific kind of exit frame; either in normal or |
| 336 | // debug mode. Expects the number of arguments in register rax and |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 337 | // sets up the number of arguments in register rdi and the pointer |
| 338 | // to the first argument in register rsi. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 339 | // |
| 340 | // Allocates arg_stack_space * kPointerSize memory (not GCed) on the stack |
| 341 | // accessible via StackSpaceOperand. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 342 | void EnterExitFrame(int arg_stack_space = 0, bool save_doubles = false); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 343 | |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 344 | // Enter specific kind of exit frame. Allocates arg_stack_space * kPointerSize |
| 345 | // memory (not GCed) on the stack accessible via StackSpaceOperand. |
| 346 | void EnterApiExitFrame(int arg_stack_space); |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 347 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 348 | // Leave the current exit frame. Expects/provides the return value in |
| 349 | // register rax:rdx (untouched) and the pointer to the first |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 350 | // argument in register rsi (if pop_arguments == true). |
| 351 | void LeaveExitFrame(bool save_doubles = false, bool pop_arguments = true); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 352 | |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 353 | // Leave the current exit frame. Expects/provides the return value in |
| 354 | // register rax (untouched). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 355 | void LeaveApiExitFrame(bool restore_context); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 356 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 357 | // Push and pop the registers that can hold pointers. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 358 | void PushSafepointRegisters() { Pushad(); } |
| 359 | void PopSafepointRegisters() { Popad(); } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 360 | // Store the value in register src in the safepoint register stack |
| 361 | // slot for register dst. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 362 | void StoreToSafepointRegisterSlot(Register dst, const Immediate& imm); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 363 | void StoreToSafepointRegisterSlot(Register dst, Register src); |
| 364 | void LoadFromSafepointRegisterSlot(Register dst, Register src); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 365 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 366 | void InitializeRootRegister() { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 367 | ExternalReference roots_array_start = |
| 368 | ExternalReference::roots_array_start(isolate()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 369 | Move(kRootRegister, roots_array_start); |
| 370 | addp(kRootRegister, Immediate(kRootRegisterBias)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 371 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 372 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 373 | // --------------------------------------------------------------------------- |
| 374 | // JavaScript invokes |
| 375 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 376 | // Removes current frame and its arguments from the stack preserving |
| 377 | // the arguments and a return address pushed to the stack for the next call. |
| 378 | // |ra_state| defines whether return address is already pushed to stack or |
| 379 | // not. Both |callee_args_count| and |caller_args_count_reg| do not include |
| 380 | // receiver. |callee_args_count| is not modified, |caller_args_count_reg| |
| 381 | // is trashed. |
| 382 | void PrepareForTailCall(const ParameterCount& callee_args_count, |
| 383 | Register caller_args_count_reg, Register scratch0, |
| 384 | Register scratch1, ReturnAddressState ra_state); |
| 385 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 386 | // Invoke the JavaScript function code by either calling or jumping. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 387 | void InvokeFunctionCode(Register function, Register new_target, |
| 388 | const ParameterCount& expected, |
| 389 | const ParameterCount& actual, InvokeFlag flag, |
| 390 | const CallWrapper& call_wrapper); |
| 391 | |
| 392 | void FloodFunctionIfStepping(Register fun, Register new_target, |
| 393 | const ParameterCount& expected, |
| 394 | const ParameterCount& actual); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 395 | |
| 396 | // Invoke the JavaScript function in the given register. Changes the |
| 397 | // current context to the context in the function before invoking. |
| 398 | void InvokeFunction(Register function, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 399 | Register new_target, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 400 | const ParameterCount& actual, |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 401 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 402 | const CallWrapper& call_wrapper); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 403 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 404 | void InvokeFunction(Register function, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 405 | Register new_target, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 406 | const ParameterCount& expected, |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 407 | const ParameterCount& actual, |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 408 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 409 | const CallWrapper& call_wrapper); |
| 410 | |
| 411 | void InvokeFunction(Handle<JSFunction> function, |
| 412 | const ParameterCount& expected, |
| 413 | const ParameterCount& actual, |
| 414 | InvokeFlag flag, |
| 415 | const CallWrapper& call_wrapper); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 416 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 417 | // --------------------------------------------------------------------------- |
| 418 | // Smi tagging, untagging and operations on tagged smis. |
| 419 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 420 | // Support for constant splitting. |
| 421 | bool IsUnsafeInt(const int32_t x); |
| 422 | void SafeMove(Register dst, Smi* src); |
| 423 | void SafePush(Smi* src); |
| 424 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 425 | // Conversions between tagged smi values and non-tagged integer values. |
| 426 | |
| 427 | // Tag an integer value. The result must be known to be a valid smi value. |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 428 | // Only uses the low 32 bits of the src register. Sets the N and Z flags |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 429 | // based on the value of the resulting smi. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 430 | void Integer32ToSmi(Register dst, Register src); |
| 431 | |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 432 | // Stores an integer32 value into a memory field that already holds a smi. |
| 433 | void Integer32ToSmiField(const Operand& dst, Register src); |
| 434 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 435 | // Adds constant to src and tags the result as a smi. |
| 436 | // Result must be a valid smi. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 437 | void Integer64PlusConstantToSmi(Register dst, Register src, int constant); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 438 | |
| 439 | // Convert smi to 32-bit integer. I.e., not sign extended into |
| 440 | // high 32 bits of destination. |
| 441 | void SmiToInteger32(Register dst, Register src); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 442 | void SmiToInteger32(Register dst, const Operand& src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 443 | |
| 444 | // Convert smi to 64-bit integer (sign extended if necessary). |
| 445 | void SmiToInteger64(Register dst, Register src); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 446 | void SmiToInteger64(Register dst, const Operand& src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 447 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 448 | // Convert smi to double. |
| 449 | void SmiToDouble(XMMRegister dst, Register src) { |
| 450 | SmiToInteger32(kScratchRegister, src); |
| 451 | Cvtlsi2sd(dst, kScratchRegister); |
| 452 | } |
| 453 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 454 | // Multiply a positive smi's integer value by a power of two. |
| 455 | // Provides result as 64-bit integer value. |
| 456 | void PositiveSmiTimesPowerOfTwoToInteger64(Register dst, |
| 457 | Register src, |
| 458 | int power); |
| 459 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 460 | // Divide a positive smi's integer value by a power of two. |
| 461 | // Provides result as 32-bit integer value. |
| 462 | void PositiveSmiDivPowerOfTwoToInteger32(Register dst, |
| 463 | Register src, |
| 464 | int power); |
| 465 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 466 | // Perform the logical or of two smi values and return a smi value. |
| 467 | // If either argument is not a smi, jump to on_not_smis and retain |
| 468 | // the original values of source registers. The destination register |
| 469 | // may be changed if it's not one of the source registers. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 470 | void SmiOrIfSmis(Register dst, |
| 471 | Register src1, |
| 472 | Register src2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 473 | Label* on_not_smis, |
| 474 | Label::Distance near_jump = Label::kFar); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 475 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 476 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 477 | // Simple comparison of smis. Both sides must be known smis to use these, |
| 478 | // otherwise use Cmp. |
| 479 | void SmiCompare(Register smi1, Register smi2); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 480 | void SmiCompare(Register dst, Smi* src); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 481 | void SmiCompare(Register dst, const Operand& src); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 482 | void SmiCompare(const Operand& dst, Register src); |
| 483 | void SmiCompare(const Operand& dst, Smi* src); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 484 | // Compare the int32 in src register to the value of the smi stored at dst. |
| 485 | void SmiCompareInteger32(const Operand& dst, Register src); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 486 | // Sets sign and zero flags depending on value of smi in register. |
| 487 | void SmiTest(Register src); |
| 488 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 489 | // Functions performing a check on a known or potential smi. Returns |
| 490 | // a condition that is satisfied if the check is successful. |
| 491 | |
| 492 | // Is the value a tagged smi. |
| 493 | Condition CheckSmi(Register src); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 494 | Condition CheckSmi(const Operand& src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 495 | |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 496 | // Is the value a non-negative tagged smi. |
| 497 | Condition CheckNonNegativeSmi(Register src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 498 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 499 | // Are both values tagged smis. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 500 | Condition CheckBothSmi(Register first, Register second); |
| 501 | |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 502 | // Are both values non-negative tagged smis. |
| 503 | Condition CheckBothNonNegativeSmi(Register first, Register second); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 504 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 505 | // Are either value a tagged smi. |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 506 | Condition CheckEitherSmi(Register first, |
| 507 | Register second, |
| 508 | Register scratch = kScratchRegister); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 509 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 510 | // Checks whether an 32-bit integer value is a valid for conversion |
| 511 | // to a smi. |
| 512 | Condition CheckInteger32ValidSmiValue(Register src); |
| 513 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 514 | // Checks whether an 32-bit unsigned integer value is a valid for |
| 515 | // conversion to a smi. |
| 516 | Condition CheckUInteger32ValidSmiValue(Register src); |
| 517 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 518 | // Check whether src is a Smi, and set dst to zero if it is a smi, |
| 519 | // and to one if it isn't. |
| 520 | void CheckSmiToIndicator(Register dst, Register src); |
| 521 | void CheckSmiToIndicator(Register dst, const Operand& src); |
| 522 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 523 | // Test-and-jump functions. Typically combines a check function |
| 524 | // above with a conditional jump. |
| 525 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 526 | // Jump if the value can be represented by a smi. |
| 527 | void JumpIfValidSmiValue(Register src, Label* on_valid, |
| 528 | Label::Distance near_jump = Label::kFar); |
| 529 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 530 | // Jump if the value cannot be represented by a smi. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 531 | void JumpIfNotValidSmiValue(Register src, Label* on_invalid, |
| 532 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 533 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 534 | // Jump if the unsigned integer value can be represented by a smi. |
| 535 | void JumpIfUIntValidSmiValue(Register src, Label* on_valid, |
| 536 | Label::Distance near_jump = Label::kFar); |
| 537 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 538 | // Jump if the unsigned integer value cannot be represented by a smi. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 539 | void JumpIfUIntNotValidSmiValue(Register src, Label* on_invalid, |
| 540 | Label::Distance near_jump = Label::kFar); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 541 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 542 | // Jump to label if the value is a tagged smi. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 543 | void JumpIfSmi(Register src, |
| 544 | Label* on_smi, |
| 545 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 546 | |
| 547 | // Jump to label if the value is not a tagged smi. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 548 | void JumpIfNotSmi(Register src, |
| 549 | Label* on_not_smi, |
| 550 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 551 | |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 552 | // Jump to label if the value is not a non-negative tagged smi. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 553 | void JumpUnlessNonNegativeSmi(Register src, |
| 554 | Label* on_not_smi, |
| 555 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 556 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 557 | // Jump to label if the value, which must be a tagged smi, has value equal |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 558 | // to the constant. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 559 | void JumpIfSmiEqualsConstant(Register src, |
| 560 | Smi* constant, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 561 | Label* on_equals, |
| 562 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 563 | |
| 564 | // Jump if either or both register are not smi values. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 565 | void JumpIfNotBothSmi(Register src1, |
| 566 | Register src2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 567 | Label* on_not_both_smi, |
| 568 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 569 | |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 570 | // Jump if either or both register are not non-negative smi values. |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 571 | void JumpUnlessBothNonNegativeSmi(Register src1, Register src2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 572 | Label* on_not_both_smi, |
| 573 | Label::Distance near_jump = Label::kFar); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 574 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 575 | // Operations on tagged smi values. |
| 576 | |
| 577 | // Smis represent a subset of integers. The subset is always equivalent to |
| 578 | // a two's complement interpretation of a fixed number of bits. |
| 579 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 580 | // Add an integer constant to a tagged smi, giving a tagged smi as result. |
| 581 | // No overflow testing on the result is done. |
| 582 | void SmiAddConstant(Register dst, Register src, Smi* constant); |
| 583 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 584 | // Add an integer constant to a tagged smi, giving a tagged smi as result. |
| 585 | // No overflow testing on the result is done. |
| 586 | void SmiAddConstant(const Operand& dst, Smi* constant); |
| 587 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 588 | // Add an integer constant to a tagged smi, giving a tagged smi as result, |
| 589 | // or jumping to a label if the result cannot be represented by a smi. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 590 | void SmiAddConstant(Register dst, Register src, Smi* constant, |
| 591 | SmiOperationConstraints constraints, Label* bailout_label, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 592 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 593 | |
| 594 | // Subtract an integer constant from a tagged smi, giving a tagged smi as |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 595 | // result. No testing on the result is done. Sets the N and Z flags |
| 596 | // based on the value of the resulting integer. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 597 | void SmiSubConstant(Register dst, Register src, Smi* constant); |
| 598 | |
| 599 | // Subtract an integer constant from a tagged smi, giving a tagged smi as |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 600 | // result, or jumping to a label if the result cannot be represented by a smi. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 601 | void SmiSubConstant(Register dst, Register src, Smi* constant, |
| 602 | SmiOperationConstraints constraints, Label* bailout_label, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 603 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 604 | |
| 605 | // Negating a smi can give a negative zero or too large positive value. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 606 | // NOTICE: This operation jumps on success, not failure! |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 607 | void SmiNeg(Register dst, |
| 608 | Register src, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 609 | Label* on_smi_result, |
| 610 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 611 | |
| 612 | // Adds smi values and return the result as a smi. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 613 | // If dst is src1, then src1 will be destroyed if the operation is |
| 614 | // successful, otherwise kept intact. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 615 | void SmiAdd(Register dst, |
| 616 | Register src1, |
| 617 | Register src2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 618 | Label* on_not_smi_result, |
| 619 | Label::Distance near_jump = Label::kFar); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 620 | void SmiAdd(Register dst, |
| 621 | Register src1, |
| 622 | const Operand& src2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 623 | Label* on_not_smi_result, |
| 624 | Label::Distance near_jump = Label::kFar); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 625 | |
| 626 | void SmiAdd(Register dst, |
| 627 | Register src1, |
| 628 | Register src2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 629 | |
| 630 | // Subtracts smi values and return the result as a smi. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 631 | // If dst is src1, then src1 will be destroyed if the operation is |
| 632 | // successful, otherwise kept intact. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 633 | void SmiSub(Register dst, |
| 634 | Register src1, |
| 635 | Register src2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 636 | Label* on_not_smi_result, |
| 637 | Label::Distance near_jump = Label::kFar); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 638 | void SmiSub(Register dst, |
| 639 | Register src1, |
| 640 | const Operand& src2, |
| 641 | Label* on_not_smi_result, |
| 642 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 643 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 644 | void SmiSub(Register dst, |
| 645 | Register src1, |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 646 | Register src2); |
| 647 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 648 | void SmiSub(Register dst, |
| 649 | Register src1, |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 650 | const Operand& src2); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 651 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 652 | // Multiplies smi values and return the result as a smi, |
| 653 | // if possible. |
| 654 | // If dst is src1, then src1 will be destroyed, even if |
| 655 | // the operation is unsuccessful. |
| 656 | void SmiMul(Register dst, |
| 657 | Register src1, |
| 658 | Register src2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 659 | Label* on_not_smi_result, |
| 660 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 661 | |
| 662 | // Divides one smi by another and returns the quotient. |
| 663 | // Clobbers rax and rdx registers. |
| 664 | void SmiDiv(Register dst, |
| 665 | Register src1, |
| 666 | Register src2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 667 | Label* on_not_smi_result, |
| 668 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 669 | |
| 670 | // Divides one smi by another and returns the remainder. |
| 671 | // Clobbers rax and rdx registers. |
| 672 | void SmiMod(Register dst, |
| 673 | Register src1, |
| 674 | Register src2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 675 | Label* on_not_smi_result, |
| 676 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 677 | |
| 678 | // Bitwise operations. |
| 679 | void SmiNot(Register dst, Register src); |
| 680 | void SmiAnd(Register dst, Register src1, Register src2); |
| 681 | void SmiOr(Register dst, Register src1, Register src2); |
| 682 | void SmiXor(Register dst, Register src1, Register src2); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 683 | void SmiAndConstant(Register dst, Register src1, Smi* constant); |
| 684 | void SmiOrConstant(Register dst, Register src1, Smi* constant); |
| 685 | void SmiXorConstant(Register dst, Register src1, Smi* constant); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 686 | |
| 687 | void SmiShiftLeftConstant(Register dst, |
| 688 | Register src, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 689 | int shift_value, |
| 690 | Label* on_not_smi_result = NULL, |
| 691 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 692 | void SmiShiftLogicalRightConstant(Register dst, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 693 | Register src, |
| 694 | int shift_value, |
| 695 | Label* on_not_smi_result, |
| 696 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 697 | void SmiShiftArithmeticRightConstant(Register dst, |
| 698 | Register src, |
| 699 | int shift_value); |
| 700 | |
| 701 | // Shifts a smi value to the left, and returns the result if that is a smi. |
| 702 | // Uses and clobbers rcx, so dst may not be rcx. |
| 703 | void SmiShiftLeft(Register dst, |
| 704 | Register src1, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 705 | Register src2, |
| 706 | Label* on_not_smi_result = NULL, |
| 707 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 708 | // Shifts a smi value to the right, shifting in zero bits at the top, and |
| 709 | // returns the unsigned intepretation of the result if that is a smi. |
| 710 | // Uses and clobbers rcx, so dst may not be rcx. |
| 711 | void SmiShiftLogicalRight(Register dst, |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 712 | Register src1, |
| 713 | Register src2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 714 | Label* on_not_smi_result, |
| 715 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 716 | // Shifts a smi value to the right, sign extending the top, and |
| 717 | // returns the signed intepretation of the result. That will always |
| 718 | // be a valid smi value, since it's numerically smaller than the |
| 719 | // original. |
| 720 | // Uses and clobbers rcx, so dst may not be rcx. |
| 721 | void SmiShiftArithmeticRight(Register dst, |
| 722 | Register src1, |
| 723 | Register src2); |
| 724 | |
| 725 | // Specialized operations |
| 726 | |
| 727 | // Select the non-smi register of two registers where exactly one is a |
| 728 | // smi. If neither are smis, jump to the failure label. |
| 729 | void SelectNonSmi(Register dst, |
| 730 | Register src1, |
| 731 | Register src2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 732 | Label* on_not_smis, |
| 733 | Label::Distance near_jump = Label::kFar); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 734 | |
| 735 | // Converts, if necessary, a smi to a combination of number and |
| 736 | // multiplier to be used as a scaled index. |
| 737 | // The src register contains a *positive* smi value. The shift is the |
| 738 | // power of two to multiply the index value by (e.g. |
| 739 | // to index by smi-value * kPointerSize, pass the smi and kPointerSizeLog2). |
| 740 | // The returned index register may be either src or dst, depending |
| 741 | // on what is most efficient. If src and dst are different registers, |
| 742 | // src is always unchanged. |
| 743 | SmiIndex SmiToIndex(Register dst, Register src, int shift); |
| 744 | |
| 745 | // Converts a positive smi to a negative index. |
| 746 | SmiIndex SmiToNegativeIndex(Register dst, Register src, int shift); |
| 747 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 748 | // Add the value of a smi in memory to an int32 register. |
| 749 | // Sets flags as a normal add. |
| 750 | void AddSmiField(Register dst, const Operand& src); |
| 751 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 752 | // Basic Smi operations. |
| 753 | void Move(Register dst, Smi* source) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 754 | LoadSmiConstant(dst, source); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 755 | } |
| 756 | |
| 757 | void Move(const Operand& dst, Smi* source) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 758 | Register constant = GetSmiConstant(source); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 759 | movp(dst, constant); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 760 | } |
| 761 | |
| 762 | void Push(Smi* smi); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 763 | |
| 764 | // Save away a raw integer with pointer size on the stack as two integers |
| 765 | // masquerading as smis so that the garbage collector skips visiting them. |
| 766 | void PushRegisterAsTwoSmis(Register src, Register scratch = kScratchRegister); |
| 767 | // Reconstruct a raw integer with pointer size from two integers masquerading |
| 768 | // as smis on the top of stack. |
| 769 | void PopRegisterAsTwoSmis(Register dst, Register scratch = kScratchRegister); |
| 770 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 771 | void Test(const Operand& dst, Smi* source); |
| 772 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 773 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 774 | // --------------------------------------------------------------------------- |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 775 | // String macros. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 776 | |
| 777 | // If object is a string, its map is loaded into object_map. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 778 | void JumpIfNotString(Register object, |
| 779 | Register object_map, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 780 | Label* not_string, |
| 781 | Label::Distance near_jump = Label::kFar); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 782 | |
| 783 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 784 | void JumpIfNotBothSequentialOneByteStrings( |
| 785 | Register first_object, Register second_object, Register scratch1, |
| 786 | Register scratch2, Label* on_not_both_flat_one_byte, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 787 | Label::Distance near_jump = Label::kFar); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 788 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 789 | // Check whether the instance type represents a flat one-byte string. Jump |
| 790 | // to the label if not. If the instance type can be scratched specify same |
| 791 | // register for both instance type and scratch. |
| 792 | void JumpIfInstanceTypeIsNotSequentialOneByte( |
| 793 | Register instance_type, Register scratch, |
| 794 | Label* on_not_flat_one_byte_string, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 795 | Label::Distance near_jump = Label::kFar); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 796 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 797 | void JumpIfBothInstanceTypesAreNotSequentialOneByte( |
| 798 | Register first_object_instance_type, Register second_object_instance_type, |
| 799 | Register scratch1, Register scratch2, Label* on_fail, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 800 | Label::Distance near_jump = Label::kFar); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 801 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 802 | void EmitSeqStringSetCharCheck(Register string, |
| 803 | Register index, |
| 804 | Register value, |
| 805 | uint32_t encoding_mask); |
| 806 | |
| 807 | // Checks if the given register or operand is a unique name |
| 808 | void JumpIfNotUniqueNameInstanceType(Register reg, Label* not_unique_name, |
| 809 | Label::Distance distance = Label::kFar); |
| 810 | void JumpIfNotUniqueNameInstanceType(Operand operand, Label* not_unique_name, |
| 811 | Label::Distance distance = Label::kFar); |
| 812 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 813 | // --------------------------------------------------------------------------- |
| 814 | // Macro instructions. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 815 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 816 | // Load/store with specific representation. |
| 817 | void Load(Register dst, const Operand& src, Representation r); |
| 818 | void Store(const Operand& dst, Register src, Representation r); |
| 819 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 820 | // Load a register with a long value as efficiently as possible. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 821 | void Set(Register dst, int64_t x); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 822 | void Set(const Operand& dst, intptr_t x); |
| 823 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 824 | void Cvtss2sd(XMMRegister dst, XMMRegister src); |
| 825 | void Cvtss2sd(XMMRegister dst, const Operand& src); |
| 826 | void Cvtsd2ss(XMMRegister dst, XMMRegister src); |
| 827 | void Cvtsd2ss(XMMRegister dst, const Operand& src); |
| 828 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 829 | // cvtsi2sd instruction only writes to the low 64-bit of dst register, which |
| 830 | // hinders register renaming and makes dependence chains longer. So we use |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 831 | // xorpd to clear the dst register before cvtsi2sd to solve this issue. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 832 | void Cvtlsi2sd(XMMRegister dst, Register src); |
| 833 | void Cvtlsi2sd(XMMRegister dst, const Operand& src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 834 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 835 | void Cvtlsi2ss(XMMRegister dst, Register src); |
| 836 | void Cvtlsi2ss(XMMRegister dst, const Operand& src); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 837 | void Cvtqsi2ss(XMMRegister dst, Register src); |
| 838 | void Cvtqsi2ss(XMMRegister dst, const Operand& src); |
| 839 | |
| 840 | void Cvtqsi2sd(XMMRegister dst, Register src); |
| 841 | void Cvtqsi2sd(XMMRegister dst, const Operand& src); |
| 842 | |
| 843 | void Cvtqui2ss(XMMRegister dst, Register src, Register tmp); |
| 844 | void Cvtqui2sd(XMMRegister dst, Register src, Register tmp); |
| 845 | |
| 846 | void Cvtsd2si(Register dst, XMMRegister src); |
| 847 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 848 | void Cvttss2si(Register dst, XMMRegister src); |
| 849 | void Cvttss2si(Register dst, const Operand& src); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 850 | void Cvttsd2si(Register dst, XMMRegister src); |
| 851 | void Cvttsd2si(Register dst, const Operand& src); |
| 852 | void Cvttss2siq(Register dst, XMMRegister src); |
| 853 | void Cvttss2siq(Register dst, const Operand& src); |
| 854 | void Cvttsd2siq(Register dst, XMMRegister src); |
| 855 | void Cvttsd2siq(Register dst, const Operand& src); |
| 856 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 857 | // Move if the registers are not identical. |
| 858 | void Move(Register target, Register source); |
| 859 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 860 | // TestBit and Load SharedFunctionInfo special field. |
| 861 | void TestBitSharedFunctionInfoSpecialField(Register base, |
| 862 | int offset, |
| 863 | int bit_index); |
| 864 | void LoadSharedFunctionInfoSpecialField(Register dst, |
| 865 | Register base, |
| 866 | int offset); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 867 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 868 | // Handle support |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 869 | void Move(Register dst, Handle<Object> source); |
| 870 | void Move(const Operand& dst, Handle<Object> source); |
| 871 | void Cmp(Register dst, Handle<Object> source); |
| 872 | void Cmp(const Operand& dst, Handle<Object> source); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 873 | void Cmp(Register dst, Smi* src); |
| 874 | void Cmp(const Operand& dst, Smi* src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 875 | void Push(Handle<Object> source); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 876 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 877 | // Load a heap object and handle the case of new-space objects by |
| 878 | // indirecting via a global cell. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 879 | void MoveHeapObject(Register result, Handle<Object> object); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 880 | |
| 881 | // Load a global cell into a register. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 882 | void LoadGlobalCell(Register dst, Handle<Cell> cell); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 883 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 884 | // Compare the given value and the value of weak cell. |
| 885 | void CmpWeakValue(Register value, Handle<WeakCell> cell, Register scratch); |
| 886 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 887 | void GetWeakValue(Register value, Handle<WeakCell> cell); |
| 888 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 889 | // Load the value of the weak cell in the value register. Branch to the given |
| 890 | // miss label if the weak cell was cleared. |
| 891 | void LoadWeakValue(Register value, Handle<WeakCell> cell, Label* miss); |
| 892 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 893 | // Emit code to discard a non-negative number of pointer-sized elements |
| 894 | // from the stack, clobbering only the rsp register. |
| 895 | void Drop(int stack_elements); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 896 | // Emit code to discard a positive number of pointer-sized elements |
| 897 | // from the stack under the return address which remains on the top, |
| 898 | // clobbering the rsp register. |
| 899 | void DropUnderReturnAddress(int stack_elements, |
| 900 | Register scratch = kScratchRegister); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 901 | |
| 902 | void Call(Label* target) { call(target); } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 903 | void Push(Register src); |
| 904 | void Push(const Operand& src); |
| 905 | void PushQuad(const Operand& src); |
| 906 | void Push(Immediate value); |
| 907 | void PushImm32(int32_t imm32); |
| 908 | void Pop(Register dst); |
| 909 | void Pop(const Operand& dst); |
| 910 | void PopQuad(const Operand& dst); |
| 911 | void PushReturnAddressFrom(Register src) { pushq(src); } |
| 912 | void PopReturnAddressTo(Register dst) { popq(dst); } |
| 913 | void Move(Register dst, ExternalReference ext) { |
| 914 | movp(dst, reinterpret_cast<void*>(ext.address()), |
| 915 | RelocInfo::EXTERNAL_REFERENCE); |
| 916 | } |
| 917 | |
| 918 | // Loads a pointer into a register with a relocation mode. |
| 919 | void Move(Register dst, void* ptr, RelocInfo::Mode rmode) { |
| 920 | // This method must not be used with heap object references. The stored |
| 921 | // address is not GC safe. Use the handle version instead. |
| 922 | DCHECK(rmode > RelocInfo::LAST_GCED_ENUM); |
| 923 | movp(dst, ptr, rmode); |
| 924 | } |
| 925 | |
| 926 | void Move(Register dst, Handle<Object> value, RelocInfo::Mode rmode) { |
| 927 | AllowDeferredHandleDereference using_raw_address; |
| 928 | DCHECK(!RelocInfo::IsNone(rmode)); |
| 929 | DCHECK(value->IsHeapObject()); |
| 930 | DCHECK(!isolate()->heap()->InNewSpace(*value)); |
| 931 | movp(dst, reinterpret_cast<void*>(value.location()), rmode); |
| 932 | } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 933 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 934 | void Move(XMMRegister dst, uint32_t src); |
| 935 | void Move(XMMRegister dst, uint64_t src); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 936 | void Move(XMMRegister dst, float src) { Move(dst, bit_cast<uint32_t>(src)); } |
| 937 | void Move(XMMRegister dst, double src) { Move(dst, bit_cast<uint64_t>(src)); } |
| 938 | |
| 939 | #define AVX_OP2_WITH_TYPE(macro_name, name, src_type) \ |
| 940 | void macro_name(XMMRegister dst, src_type src) { \ |
| 941 | if (CpuFeatures::IsSupported(AVX)) { \ |
| 942 | CpuFeatureScope scope(this, AVX); \ |
| 943 | v##name(dst, dst, src); \ |
| 944 | } else { \ |
| 945 | name(dst, src); \ |
| 946 | } \ |
| 947 | } |
| 948 | #define AVX_OP2_X(macro_name, name) \ |
| 949 | AVX_OP2_WITH_TYPE(macro_name, name, XMMRegister) |
| 950 | #define AVX_OP2_O(macro_name, name) \ |
| 951 | AVX_OP2_WITH_TYPE(macro_name, name, const Operand&) |
| 952 | #define AVX_OP2_XO(macro_name, name) \ |
| 953 | AVX_OP2_X(macro_name, name) \ |
| 954 | AVX_OP2_O(macro_name, name) |
| 955 | |
| 956 | AVX_OP2_XO(Addsd, addsd) |
| 957 | AVX_OP2_XO(Subsd, subsd) |
| 958 | AVX_OP2_XO(Mulsd, mulsd) |
| 959 | AVX_OP2_XO(Divsd, divsd) |
| 960 | AVX_OP2_X(Andpd, andpd) |
| 961 | AVX_OP2_X(Orpd, orpd) |
| 962 | AVX_OP2_X(Xorpd, xorpd) |
| 963 | AVX_OP2_X(Pcmpeqd, pcmpeqd) |
| 964 | AVX_OP2_WITH_TYPE(Psllq, psllq, byte) |
| 965 | AVX_OP2_WITH_TYPE(Psrlq, psrlq, byte) |
| 966 | |
| 967 | #undef AVX_OP2_O |
| 968 | #undef AVX_OP2_X |
| 969 | #undef AVX_OP2_XO |
| 970 | #undef AVX_OP2_WITH_TYPE |
| 971 | |
| 972 | void Movsd(XMMRegister dst, XMMRegister src); |
| 973 | void Movsd(XMMRegister dst, const Operand& src); |
| 974 | void Movsd(const Operand& dst, XMMRegister src); |
| 975 | void Movss(XMMRegister dst, XMMRegister src); |
| 976 | void Movss(XMMRegister dst, const Operand& src); |
| 977 | void Movss(const Operand& dst, XMMRegister src); |
| 978 | |
| 979 | void Movd(XMMRegister dst, Register src); |
| 980 | void Movd(XMMRegister dst, const Operand& src); |
| 981 | void Movd(Register dst, XMMRegister src); |
| 982 | void Movq(XMMRegister dst, Register src); |
| 983 | void Movq(Register dst, XMMRegister src); |
| 984 | |
| 985 | void Movaps(XMMRegister dst, XMMRegister src); |
| 986 | void Movapd(XMMRegister dst, XMMRegister src); |
| 987 | void Movmskpd(Register dst, XMMRegister src); |
| 988 | |
| 989 | void Roundss(XMMRegister dst, XMMRegister src, RoundingMode mode); |
| 990 | void Roundsd(XMMRegister dst, XMMRegister src, RoundingMode mode); |
| 991 | void Sqrtsd(XMMRegister dst, XMMRegister src); |
| 992 | void Sqrtsd(XMMRegister dst, const Operand& src); |
| 993 | |
| 994 | void Ucomiss(XMMRegister src1, XMMRegister src2); |
| 995 | void Ucomiss(XMMRegister src1, const Operand& src2); |
| 996 | void Ucomisd(XMMRegister src1, XMMRegister src2); |
| 997 | void Ucomisd(XMMRegister src1, const Operand& src2); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 998 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 999 | // Control Flow |
| 1000 | void Jump(Address destination, RelocInfo::Mode rmode); |
| 1001 | void Jump(ExternalReference ext); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1002 | void Jump(const Operand& op); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1003 | void Jump(Handle<Code> code_object, RelocInfo::Mode rmode); |
| 1004 | |
| 1005 | void Call(Address destination, RelocInfo::Mode rmode); |
| 1006 | void Call(ExternalReference ext); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1007 | void Call(const Operand& op); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1008 | void Call(Handle<Code> code_object, |
| 1009 | RelocInfo::Mode rmode, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1010 | TypeFeedbackId ast_id = TypeFeedbackId::None()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1011 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1012 | // The size of the code generated for different call instructions. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1013 | int CallSize(Address destination) { |
| 1014 | return kCallSequenceLength; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1015 | } |
| 1016 | int CallSize(ExternalReference ext); |
| 1017 | int CallSize(Handle<Code> code_object) { |
| 1018 | // Code calls use 32-bit relative addressing. |
| 1019 | return kShortCallInstructionLength; |
| 1020 | } |
| 1021 | int CallSize(Register target) { |
| 1022 | // Opcode: REX_opt FF /2 m64 |
| 1023 | return (target.high_bit() != 0) ? 3 : 2; |
| 1024 | } |
| 1025 | int CallSize(const Operand& target) { |
| 1026 | // Opcode: REX_opt FF /2 m64 |
| 1027 | return (target.requires_rex() ? 2 : 1) + target.operand_size(); |
| 1028 | } |
| 1029 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1030 | // Non-SSE2 instructions. |
| 1031 | void Pextrd(Register dst, XMMRegister src, int8_t imm8); |
| 1032 | void Pinsrd(XMMRegister dst, Register src, int8_t imm8); |
| 1033 | void Pinsrd(XMMRegister dst, const Operand& src, int8_t imm8); |
| 1034 | |
| 1035 | void Lzcntq(Register dst, Register src); |
| 1036 | void Lzcntq(Register dst, const Operand& src); |
| 1037 | |
| 1038 | void Lzcntl(Register dst, Register src); |
| 1039 | void Lzcntl(Register dst, const Operand& src); |
| 1040 | |
| 1041 | void Tzcntq(Register dst, Register src); |
| 1042 | void Tzcntq(Register dst, const Operand& src); |
| 1043 | |
| 1044 | void Tzcntl(Register dst, Register src); |
| 1045 | void Tzcntl(Register dst, const Operand& src); |
| 1046 | |
| 1047 | void Popcntl(Register dst, Register src); |
| 1048 | void Popcntl(Register dst, const Operand& src); |
| 1049 | |
| 1050 | void Popcntq(Register dst, Register src); |
| 1051 | void Popcntq(Register dst, const Operand& src); |
| 1052 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1053 | // Non-x64 instructions. |
| 1054 | // Push/pop all general purpose registers. |
| 1055 | // Does not push rsp/rbp nor any of the assembler's special purpose registers |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1056 | // (kScratchRegister, kRootRegister). |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1057 | void Pushad(); |
| 1058 | void Popad(); |
| 1059 | // Sets the stack as after performing Popad, without actually loading the |
| 1060 | // registers. |
| 1061 | void Dropad(); |
| 1062 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1063 | // Compare object type for heap object. |
| 1064 | // Always use unsigned comparisons: above and below, not less and greater. |
| 1065 | // Incoming register is heap_object and outgoing register is map. |
| 1066 | // They may be the same register, and may be kScratchRegister. |
| 1067 | void CmpObjectType(Register heap_object, InstanceType type, Register map); |
| 1068 | |
| 1069 | // Compare instance type for map. |
| 1070 | // Always use unsigned comparisons: above and below, not less and greater. |
| 1071 | void CmpInstanceType(Register map, InstanceType type); |
| 1072 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1073 | // Check if a map for a JSObject indicates that the object has fast elements. |
| 1074 | // Jump to the specified label if it does not. |
| 1075 | void CheckFastElements(Register map, |
| 1076 | Label* fail, |
| 1077 | Label::Distance distance = Label::kFar); |
| 1078 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1079 | // Check if a map for a JSObject indicates that the object can have both smi |
| 1080 | // and HeapObject elements. Jump to the specified label if it does not. |
| 1081 | void CheckFastObjectElements(Register map, |
| 1082 | Label* fail, |
| 1083 | Label::Distance distance = Label::kFar); |
| 1084 | |
| 1085 | // Check if a map for a JSObject indicates that the object has fast smi only |
| 1086 | // elements. Jump to the specified label if it does not. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1087 | void CheckFastSmiElements(Register map, |
| 1088 | Label* fail, |
| 1089 | Label::Distance distance = Label::kFar); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1090 | |
| 1091 | // Check to see if maybe_number can be stored as a double in |
| 1092 | // FastDoubleElements. If it can, store it at the index specified by index in |
| 1093 | // the FastDoubleElements array elements, otherwise jump to fail. Note that |
| 1094 | // index must not be smi-tagged. |
| 1095 | void StoreNumberToDoubleElements(Register maybe_number, |
| 1096 | Register elements, |
| 1097 | Register index, |
| 1098 | XMMRegister xmm_scratch, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1099 | Label* fail, |
| 1100 | int elements_offset = 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1101 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1102 | // Compare an object's map with the specified map. |
| 1103 | void CompareMap(Register obj, Handle<Map> map); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1104 | |
| 1105 | // Check if the map of an object is equal to a specified map and branch to |
| 1106 | // label if not. Skip the smi check if not required (object is known to be a |
| 1107 | // heap object). If mode is ALLOW_ELEMENT_TRANSITION_MAPS, then also match |
| 1108 | // against maps that are ElementsKind transition maps of the specified map. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1109 | void CheckMap(Register obj, |
| 1110 | Handle<Map> map, |
| 1111 | Label* fail, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1112 | SmiCheckType smi_check_type); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1113 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1114 | // Check if the map of an object is equal to a specified weak map and branch |
| 1115 | // to a specified target if equal. Skip the smi check if not required |
| 1116 | // (object is known to be a heap object) |
| 1117 | void DispatchWeakMap(Register obj, Register scratch1, Register scratch2, |
| 1118 | Handle<WeakCell> cell, Handle<Code> success, |
| 1119 | SmiCheckType smi_check_type); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1120 | |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 1121 | // Check if the object in register heap_object is a string. Afterwards the |
| 1122 | // register map contains the object map and the register instance_type |
| 1123 | // contains the instance_type. The registers map and instance_type can be the |
| 1124 | // same in which case it contains the instance type afterwards. Either of the |
| 1125 | // registers map and instance_type can be the same as heap_object. |
| 1126 | Condition IsObjectStringType(Register heap_object, |
| 1127 | Register map, |
| 1128 | Register instance_type); |
| 1129 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1130 | // Check if the object in register heap_object is a name. Afterwards the |
| 1131 | // register map contains the object map and the register instance_type |
| 1132 | // contains the instance_type. The registers map and instance_type can be the |
| 1133 | // same in which case it contains the instance type afterwards. Either of the |
| 1134 | // registers map and instance_type can be the same as heap_object. |
| 1135 | Condition IsObjectNameType(Register heap_object, |
| 1136 | Register map, |
| 1137 | Register instance_type); |
| 1138 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1139 | // FCmp compares and pops the two values on top of the FPU stack. |
| 1140 | // The flag results are similar to integer cmp, but requires unsigned |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1141 | // jcc instructions (je, ja, jae, jb, jbe, je, and jz). |
| 1142 | void FCmp(); |
| 1143 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1144 | void ClampUint8(Register reg); |
| 1145 | |
| 1146 | void ClampDoubleToUint8(XMMRegister input_reg, |
| 1147 | XMMRegister temp_xmm_reg, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1148 | Register result_reg); |
| 1149 | |
| 1150 | void SlowTruncateToI(Register result_reg, Register input_reg, |
| 1151 | int offset = HeapNumber::kValueOffset - kHeapObjectTag); |
| 1152 | |
| 1153 | void TruncateHeapNumberToI(Register result_reg, Register input_reg); |
| 1154 | void TruncateDoubleToI(Register result_reg, XMMRegister input_reg); |
| 1155 | |
| 1156 | void DoubleToI(Register result_reg, XMMRegister input_reg, |
| 1157 | XMMRegister scratch, MinusZeroMode minus_zero_mode, |
| 1158 | Label* lost_precision, Label* is_nan, Label* minus_zero, |
| 1159 | Label::Distance dst = Label::kFar); |
| 1160 | |
| 1161 | void LoadUint32(XMMRegister dst, Register src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1162 | |
| 1163 | void LoadInstanceDescriptors(Register map, Register descriptors); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1164 | void EnumLength(Register dst, Register map); |
| 1165 | void NumberOfOwnDescriptors(Register dst, Register map); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1166 | void LoadAccessor(Register dst, Register holder, int accessor_index, |
| 1167 | AccessorComponent accessor); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1168 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1169 | template<typename Field> |
| 1170 | void DecodeField(Register reg) { |
| 1171 | static const int shift = Field::kShift; |
| 1172 | static const int mask = Field::kMask >> Field::kShift; |
| 1173 | if (shift != 0) { |
| 1174 | shrp(reg, Immediate(shift)); |
| 1175 | } |
| 1176 | andp(reg, Immediate(mask)); |
| 1177 | } |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1178 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1179 | template<typename Field> |
| 1180 | void DecodeFieldToSmi(Register reg) { |
| 1181 | if (SmiValuesAre32Bits()) { |
| 1182 | andp(reg, Immediate(Field::kMask)); |
| 1183 | shlp(reg, Immediate(kSmiShift - Field::kShift)); |
| 1184 | } else { |
| 1185 | static const int shift = Field::kShift; |
| 1186 | static const int mask = (Field::kMask >> Field::kShift) << kSmiTagSize; |
| 1187 | DCHECK(SmiValuesAre31Bits()); |
| 1188 | DCHECK(kSmiShift == kSmiTagSize); |
| 1189 | DCHECK((mask & 0x80000000u) == 0); |
| 1190 | if (shift < kSmiShift) { |
| 1191 | shlp(reg, Immediate(kSmiShift - shift)); |
| 1192 | } else if (shift > kSmiShift) { |
| 1193 | sarp(reg, Immediate(shift - kSmiShift)); |
| 1194 | } |
| 1195 | andp(reg, Immediate(mask)); |
| 1196 | } |
| 1197 | } |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1198 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1199 | // Abort execution if argument is not a number, enabled via --debug-code. |
| 1200 | void AssertNumber(Register object); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1201 | void AssertNotNumber(Register object); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1202 | |
| 1203 | // Abort execution if argument is a smi, enabled via --debug-code. |
| 1204 | void AssertNotSmi(Register object); |
| 1205 | |
| 1206 | // Abort execution if argument is not a smi, enabled via --debug-code. |
| 1207 | void AssertSmi(Register object); |
| 1208 | void AssertSmi(const Operand& object); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1209 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1210 | // Abort execution if a 64 bit register containing a 32 bit payload does not |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1211 | // have zeros in the top 32 bits, enabled via --debug-code. |
| 1212 | void AssertZeroExtended(Register reg); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1213 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1214 | // Abort execution if argument is not a string, enabled via --debug-code. |
| 1215 | void AssertString(Register object); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1216 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1217 | // Abort execution if argument is not a name, enabled via --debug-code. |
| 1218 | void AssertName(Register object); |
| 1219 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1220 | // Abort execution if argument is not a JSFunction, enabled via --debug-code. |
| 1221 | void AssertFunction(Register object); |
| 1222 | |
| 1223 | // Abort execution if argument is not a JSBoundFunction, |
| 1224 | // enabled via --debug-code. |
| 1225 | void AssertBoundFunction(Register object); |
| 1226 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1227 | // Abort execution if argument is not a JSGeneratorObject, |
| 1228 | // enabled via --debug-code. |
| 1229 | void AssertGeneratorObject(Register object); |
| 1230 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1231 | // Abort execution if argument is not a JSReceiver, enabled via --debug-code. |
| 1232 | void AssertReceiver(Register object); |
| 1233 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1234 | // Abort execution if argument is not undefined or an AllocationSite, enabled |
| 1235 | // via --debug-code. |
| 1236 | void AssertUndefinedOrAllocationSite(Register object); |
| 1237 | |
| 1238 | // Abort execution if argument is not the root value with the given index, |
| 1239 | // enabled via --debug-code. |
| 1240 | void AssertRootValue(Register src, |
| 1241 | Heap::RootListIndex root_value_index, |
| 1242 | BailoutReason reason); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 1243 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1244 | // --------------------------------------------------------------------------- |
| 1245 | // Exception handling |
| 1246 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1247 | // Push a new stack handler and link it into stack handler chain. |
| 1248 | void PushStackHandler(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1249 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1250 | // Unlink the stack handler on top of the stack from the stack handler chain. |
| 1251 | void PopStackHandler(); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1252 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1253 | // --------------------------------------------------------------------------- |
| 1254 | // Inline caching support |
| 1255 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1256 | // Generate code for checking access rights - used for security checks |
| 1257 | // on access to global objects across environments. The holder register |
| 1258 | // is left untouched, but the scratch register and kScratchRegister, |
| 1259 | // which must be different, are clobbered. |
| 1260 | void CheckAccessGlobalProxy(Register holder_reg, |
| 1261 | Register scratch, |
| 1262 | Label* miss); |
| 1263 | |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 1264 | void GetNumberHash(Register r0, Register scratch); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1265 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1266 | void LoadFromNumberDictionary(Label* miss, |
| 1267 | Register elements, |
| 1268 | Register key, |
| 1269 | Register r0, |
| 1270 | Register r1, |
| 1271 | Register r2, |
| 1272 | Register result); |
| 1273 | |
| 1274 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1275 | // --------------------------------------------------------------------------- |
| 1276 | // Allocation support |
| 1277 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1278 | // Allocate an object in new space or old space. If the given space |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1279 | // is exhausted control continues at the gc_required label. The allocated |
| 1280 | // object is returned in result and end of the new object is returned in |
| 1281 | // result_end. The register scratch can be passed as no_reg in which case |
| 1282 | // an additional object reference will be added to the reloc info. The |
| 1283 | // returned pointers in result and result_end have not yet been tagged as |
| 1284 | // heap objects. If result_contains_top_on_entry is true the content of |
| 1285 | // result is known to be the allocation top on entry (could be result_end |
| 1286 | // from a previous call). If result_contains_top_on_entry is true scratch |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1287 | // should be no_reg as it is never used. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1288 | void Allocate(int object_size, |
| 1289 | Register result, |
| 1290 | Register result_end, |
| 1291 | Register scratch, |
| 1292 | Label* gc_required, |
| 1293 | AllocationFlags flags); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1294 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1295 | void Allocate(int header_size, |
| 1296 | ScaleFactor element_size, |
| 1297 | Register element_count, |
| 1298 | Register result, |
| 1299 | Register result_end, |
| 1300 | Register scratch, |
| 1301 | Label* gc_required, |
| 1302 | AllocationFlags flags); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1303 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1304 | void Allocate(Register object_size, |
| 1305 | Register result, |
| 1306 | Register result_end, |
| 1307 | Register scratch, |
| 1308 | Label* gc_required, |
| 1309 | AllocationFlags flags); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1310 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1311 | // FastAllocate is right now only used for folded allocations. It just |
| 1312 | // increments the top pointer without checking against limit. This can only |
| 1313 | // be done if it was proved earlier that the allocation will succeed. |
| 1314 | void FastAllocate(int object_size, Register result, Register result_end, |
| 1315 | AllocationFlags flags); |
| 1316 | |
| 1317 | void FastAllocate(Register object_size, Register result, Register result_end, |
| 1318 | AllocationFlags flags); |
| 1319 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1320 | // Allocate a heap number in new space with undefined value. Returns |
| 1321 | // tagged pointer in result register, or jumps to gc_required if new |
| 1322 | // space is full. |
| 1323 | void AllocateHeapNumber(Register result, |
| 1324 | Register scratch, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1325 | Label* gc_required, |
| 1326 | MutableMode mode = IMMUTABLE); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1327 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1328 | // Allocate a sequential string. All the header fields of the string object |
| 1329 | // are initialized. |
| 1330 | void AllocateTwoByteString(Register result, |
| 1331 | Register length, |
| 1332 | Register scratch1, |
| 1333 | Register scratch2, |
| 1334 | Register scratch3, |
| 1335 | Label* gc_required); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1336 | void AllocateOneByteString(Register result, Register length, |
| 1337 | Register scratch1, Register scratch2, |
| 1338 | Register scratch3, Label* gc_required); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1339 | |
| 1340 | // Allocate a raw cons string object. Only the map field of the result is |
| 1341 | // initialized. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1342 | void AllocateTwoByteConsString(Register result, |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1343 | Register scratch1, |
| 1344 | Register scratch2, |
| 1345 | Label* gc_required); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1346 | void AllocateOneByteConsString(Register result, Register scratch1, |
| 1347 | Register scratch2, Label* gc_required); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1348 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1349 | // Allocate a raw sliced string object. Only the map field of the result is |
| 1350 | // initialized. |
| 1351 | void AllocateTwoByteSlicedString(Register result, |
| 1352 | Register scratch1, |
| 1353 | Register scratch2, |
| 1354 | Label* gc_required); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1355 | void AllocateOneByteSlicedString(Register result, Register scratch1, |
| 1356 | Register scratch2, Label* gc_required); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1357 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1358 | // Allocate and initialize a JSValue wrapper with the specified {constructor} |
| 1359 | // and {value}. |
| 1360 | void AllocateJSValue(Register result, Register constructor, Register value, |
| 1361 | Register scratch, Label* gc_required); |
| 1362 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1363 | // --------------------------------------------------------------------------- |
| 1364 | // Support functions. |
| 1365 | |
| 1366 | // Check if result is zero and op is negative. |
| 1367 | void NegativeZeroTest(Register result, Register op, Label* then_label); |
| 1368 | |
| 1369 | // Check if result is zero and op is negative in code using jump targets. |
| 1370 | void NegativeZeroTest(CodeGenerator* cgen, |
| 1371 | Register result, |
| 1372 | Register op, |
| 1373 | JumpTarget* then_target); |
| 1374 | |
| 1375 | // Check if result is zero and any of op1 and op2 are negative. |
| 1376 | // Register scratch is destroyed, and it must be different from op2. |
| 1377 | void NegativeZeroTest(Register result, Register op1, Register op2, |
| 1378 | Register scratch, Label* then_label); |
| 1379 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1380 | // Machine code version of Map::GetConstructor(). |
| 1381 | // |temp| holds |result|'s map when done. |
| 1382 | void GetMapConstructor(Register result, Register map, Register temp); |
| 1383 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1384 | // Try to get function prototype of a function and puts the value in |
| 1385 | // the result register. Checks that the function really is a |
| 1386 | // function and jumps to the miss label if the fast checks fail. The |
| 1387 | // function register will be untouched; the other register may be |
| 1388 | // clobbered. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1389 | void TryGetFunctionPrototype(Register function, Register result, Label* miss); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1390 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1391 | // Picks out an array index from the hash field. |
| 1392 | // Register use: |
| 1393 | // hash - holds the index's hash. Clobbered. |
| 1394 | // index - holds the overwritten index on exit. |
| 1395 | void IndexFromHash(Register hash, Register index); |
| 1396 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1397 | // Find the function context up the context chain. |
| 1398 | void LoadContext(Register dst, int context_chain_length); |
| 1399 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1400 | // Load the global object from the current context. |
| 1401 | void LoadGlobalObject(Register dst) { |
| 1402 | LoadNativeContextSlot(Context::EXTENSION_INDEX, dst); |
| 1403 | } |
| 1404 | |
| 1405 | // Load the global proxy from the current context. |
| 1406 | void LoadGlobalProxy(Register dst) { |
| 1407 | LoadNativeContextSlot(Context::GLOBAL_PROXY_INDEX, dst); |
| 1408 | } |
| 1409 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1410 | // Conditionally load the cached Array transitioned map of type |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1411 | // transitioned_kind from the native context if the map in register |
| 1412 | // map_in_out is the cached Array map in the native context of |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1413 | // expected_kind. |
| 1414 | void LoadTransitionedArrayMapConditional( |
| 1415 | ElementsKind expected_kind, |
| 1416 | ElementsKind transitioned_kind, |
| 1417 | Register map_in_out, |
| 1418 | Register scratch, |
| 1419 | Label* no_map_match); |
| 1420 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1421 | // Load the native context slot with the current index. |
| 1422 | void LoadNativeContextSlot(int index, Register dst); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1423 | |
| 1424 | // Load the initial map from the global function. The registers |
| 1425 | // function and map can be the same. |
| 1426 | void LoadGlobalFunctionInitialMap(Register function, Register map); |
| 1427 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1428 | // --------------------------------------------------------------------------- |
| 1429 | // Runtime calls |
| 1430 | |
| 1431 | // Call a code stub. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1432 | void CallStub(CodeStub* stub, TypeFeedbackId ast_id = TypeFeedbackId::None()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1433 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1434 | // Tail call a code stub (jump). |
| 1435 | void TailCallStub(CodeStub* stub); |
| 1436 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1437 | // Return from a code stub after popping its arguments. |
| 1438 | void StubReturn(int argc); |
| 1439 | |
| 1440 | // Call a runtime routine. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1441 | void CallRuntime(const Runtime::Function* f, |
| 1442 | int num_arguments, |
| 1443 | SaveFPRegsMode save_doubles = kDontSaveFPRegs); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1444 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1445 | // Call a runtime function and save the value of XMM registers. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1446 | void CallRuntimeSaveDoubles(Runtime::FunctionId fid) { |
| 1447 | const Runtime::Function* function = Runtime::FunctionForId(fid); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1448 | CallRuntime(function, function->nargs, kSaveFPRegs); |
| 1449 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1450 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1451 | // Convenience function: Same as above, but takes the fid instead. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1452 | void CallRuntime(Runtime::FunctionId fid, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1453 | SaveFPRegsMode save_doubles = kDontSaveFPRegs) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1454 | const Runtime::Function* function = Runtime::FunctionForId(fid); |
| 1455 | CallRuntime(function, function->nargs, save_doubles); |
| 1456 | } |
| 1457 | |
| 1458 | // Convenience function: Same as above, but takes the fid instead. |
| 1459 | void CallRuntime(Runtime::FunctionId fid, int num_arguments, |
| 1460 | SaveFPRegsMode save_doubles = kDontSaveFPRegs) { |
| 1461 | CallRuntime(Runtime::FunctionForId(fid), num_arguments, save_doubles); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1462 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1463 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1464 | // Convenience function: call an external reference. |
| 1465 | void CallExternalReference(const ExternalReference& ext, |
| 1466 | int num_arguments); |
| 1467 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1468 | // Convenience function: tail call a runtime routine (jump) |
| 1469 | void TailCallRuntime(Runtime::FunctionId fid); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1470 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1471 | // Jump to a runtime routines |
| 1472 | void JumpToExternalReference(const ExternalReference& ext); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1473 | |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 1474 | // Before calling a C-function from generated code, align arguments on stack. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1475 | // After aligning the frame, arguments must be stored in rsp[0], rsp[8], |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 1476 | // etc., not pushed. The argument count assumes all arguments are word sized. |
| 1477 | // The number of slots reserved for arguments depends on platform. On Windows |
| 1478 | // stack slots are reserved for the arguments passed in registers. On other |
| 1479 | // platforms stack slots are only reserved for the arguments actually passed |
| 1480 | // on the stack. |
| 1481 | void PrepareCallCFunction(int num_arguments); |
| 1482 | |
| 1483 | // Calls a C function and cleans up the space for arguments allocated |
| 1484 | // by PrepareCallCFunction. The called function is not allowed to trigger a |
| 1485 | // garbage collection, since that might move the code and invalidate the |
| 1486 | // return address (unless this is somehow accounted for by the called |
| 1487 | // function). |
| 1488 | void CallCFunction(ExternalReference function, int num_arguments); |
| 1489 | void CallCFunction(Register function, int num_arguments); |
| 1490 | |
| 1491 | // Calculate the number of stack slots to reserve for arguments when calling a |
| 1492 | // C function. |
| 1493 | int ArgumentStackSlotsForCFunctionCall(int num_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1494 | |
| 1495 | // --------------------------------------------------------------------------- |
| 1496 | // Utilities |
| 1497 | |
| 1498 | void Ret(); |
| 1499 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1500 | // Return and drop arguments from stack, where the number of arguments |
| 1501 | // may be bigger than 2^16 - 1. Requires a scratch register. |
| 1502 | void Ret(int bytes_dropped, Register scratch); |
| 1503 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1504 | Handle<Object> CodeObject() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1505 | DCHECK(!code_object_.is_null()); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1506 | return code_object_; |
| 1507 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1508 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1509 | // Copy length bytes from source to destination. |
| 1510 | // Uses scratch register internally (if you have a low-eight register |
| 1511 | // free, do use it, otherwise kScratchRegister will be used). |
| 1512 | // The min_length is a minimum limit on the value that length will have. |
| 1513 | // The algorithm has some special cases that might be omitted if the string |
| 1514 | // is known to always be long. |
| 1515 | void CopyBytes(Register destination, |
| 1516 | Register source, |
| 1517 | Register length, |
| 1518 | int min_length = 0, |
| 1519 | Register scratch = kScratchRegister); |
| 1520 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1521 | // Initialize fields with filler values. Fields starting at |current_address| |
| 1522 | // not including |end_address| are overwritten with the value in |filler|. At |
| 1523 | // the end the loop, |current_address| takes the value of |end_address|. |
| 1524 | void InitializeFieldsWithFiller(Register current_address, |
| 1525 | Register end_address, Register filler); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1526 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1527 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1528 | // Emit code for a truncating division by a constant. The dividend register is |
| 1529 | // unchanged, the result is in rdx, and rax gets clobbered. |
| 1530 | void TruncatingDiv(Register dividend, int32_t divisor); |
| 1531 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1532 | // --------------------------------------------------------------------------- |
| 1533 | // StatsCounter support |
| 1534 | |
| 1535 | void SetCounter(StatsCounter* counter, int value); |
| 1536 | void IncrementCounter(StatsCounter* counter, int value); |
| 1537 | void DecrementCounter(StatsCounter* counter, int value); |
| 1538 | |
| 1539 | |
| 1540 | // --------------------------------------------------------------------------- |
| 1541 | // Debugging |
| 1542 | |
| 1543 | // Calls Abort(msg) if the condition cc is not satisfied. |
| 1544 | // Use --debug_code to enable. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1545 | void Assert(Condition cc, BailoutReason reason); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1546 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1547 | void AssertFastElements(Register elements); |
| 1548 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1549 | // Like Assert(), but always enabled. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1550 | void Check(Condition cc, BailoutReason reason); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1551 | |
| 1552 | // Print a message to stdout and abort execution. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1553 | void Abort(BailoutReason msg); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1554 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1555 | // Check that the stack is aligned. |
| 1556 | void CheckStackAlignment(); |
| 1557 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1558 | // Verify restrictions about code generated in stubs. |
| 1559 | void set_generating_stub(bool value) { generating_stub_ = value; } |
| 1560 | bool generating_stub() { return generating_stub_; } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1561 | void set_has_frame(bool value) { has_frame_ = value; } |
| 1562 | bool has_frame() { return has_frame_; } |
| 1563 | inline bool AllowThisStubCall(CodeStub* stub); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1564 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1565 | static int SafepointRegisterStackIndex(Register reg) { |
| 1566 | return SafepointRegisterStackIndex(reg.code()); |
| 1567 | } |
| 1568 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1569 | // Load the type feedback vector from a JavaScript frame. |
| 1570 | void EmitLoadTypeFeedbackVector(Register vector); |
| 1571 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1572 | // Activation support. |
| 1573 | void EnterFrame(StackFrame::Type type); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1574 | void EnterFrame(StackFrame::Type type, bool load_constant_pool_pointer_reg); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1575 | void LeaveFrame(StackFrame::Type type); |
| 1576 | |
| 1577 | // Expects object in rax and returns map with validated enum cache |
| 1578 | // in rax. Assumes that any other register can be used as a scratch. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1579 | void CheckEnumCache(Label* call_runtime); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1580 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1581 | // AllocationMemento support. Arrays may have an associated |
| 1582 | // AllocationMemento object that can be checked for in order to pretransition |
| 1583 | // to another type. |
| 1584 | // On entry, receiver_reg should point to the array object. |
| 1585 | // scratch_reg gets clobbered. |
| 1586 | // If allocation info is present, condition flags are set to equal. |
| 1587 | void TestJSArrayForAllocationMemento(Register receiver_reg, |
| 1588 | Register scratch_reg, |
| 1589 | Label* no_memento_found); |
| 1590 | |
| 1591 | void JumpIfJSArrayHasAllocationMemento(Register receiver_reg, |
| 1592 | Register scratch_reg, |
| 1593 | Label* memento_found) { |
| 1594 | Label no_memento_found; |
| 1595 | TestJSArrayForAllocationMemento(receiver_reg, scratch_reg, |
| 1596 | &no_memento_found); |
| 1597 | j(equal, memento_found); |
| 1598 | bind(&no_memento_found); |
| 1599 | } |
| 1600 | |
| 1601 | // Jumps to found label if a prototype map has dictionary elements. |
| 1602 | void JumpIfDictionaryInPrototypeChain(Register object, Register scratch0, |
| 1603 | Register scratch1, Label* found); |
| 1604 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1605 | private: |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1606 | // Order general registers are pushed by Pushad. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1607 | // rax, rcx, rdx, rbx, rsi, rdi, r8, r9, r11, r12, r14, r15. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1608 | static const int kSafepointPushRegisterIndices[Register::kNumRegisters]; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1609 | static const int kNumSafepointSavedRegisters = 12; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1610 | static const int kSmiShift = kSmiTagSize + kSmiShiftSize; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1611 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1612 | bool generating_stub_; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1613 | bool has_frame_; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1614 | bool root_array_available_; |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1615 | |
| 1616 | // Returns a register holding the smi value. The register MUST NOT be |
| 1617 | // modified. It may be the "smi 1 constant" register. |
| 1618 | Register GetSmiConstant(Smi* value); |
| 1619 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1620 | int64_t RootRegisterDelta(ExternalReference other); |
| 1621 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1622 | // Moves the smi value to the destination register. |
| 1623 | void LoadSmiConstant(Register dst, Smi* value); |
| 1624 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1625 | // This handle will be patched with the code object on installation. |
| 1626 | Handle<Object> code_object_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1627 | |
| 1628 | // Helper functions for generating invokes. |
| 1629 | void InvokePrologue(const ParameterCount& expected, |
| 1630 | const ParameterCount& actual, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1631 | Label* done, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1632 | bool* definitely_mismatches, |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1633 | InvokeFlag flag, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1634 | Label::Distance near_jump, |
| 1635 | const CallWrapper& call_wrapper); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1636 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1637 | void EnterExitFramePrologue(bool save_rax); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1638 | |
| 1639 | // Allocates arg_stack_space * kPointerSize memory (not GCed) on the stack |
| 1640 | // accessible via StackSpaceOperand. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1641 | void EnterExitFrameEpilogue(int arg_stack_space, bool save_doubles); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1642 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1643 | void LeaveExitFrameEpilogue(bool restore_context); |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 1644 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1645 | // Allocation support helpers. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1646 | // Loads the top of new-space into the result register. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1647 | // Otherwise the address of the new-space top is loaded into scratch (if |
| 1648 | // scratch is valid), and the new-space top is loaded into result. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1649 | void LoadAllocationTopHelper(Register result, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1650 | Register scratch, |
| 1651 | AllocationFlags flags); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1652 | |
| 1653 | void MakeSureDoubleAlignedHelper(Register result, |
| 1654 | Register scratch, |
| 1655 | Label* gc_required, |
| 1656 | AllocationFlags flags); |
| 1657 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1658 | // Update allocation top with value in result_end register. |
| 1659 | // If scratch is valid, it contains the address of the allocation top. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1660 | void UpdateAllocationTopHelper(Register result_end, |
| 1661 | Register scratch, |
| 1662 | AllocationFlags flags); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1663 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1664 | // Helper for implementing JumpIfNotInNewSpace and JumpIfInNewSpace. |
| 1665 | void InNewSpace(Register object, |
| 1666 | Register scratch, |
| 1667 | Condition cc, |
| 1668 | Label* branch, |
| 1669 | Label::Distance distance = Label::kFar); |
| 1670 | |
| 1671 | // Helper for finding the mark bits for an address. Afterwards, the |
| 1672 | // bitmap register points at the word with the mark bits and the mask |
| 1673 | // the position of the first bit. Uses rcx as scratch and leaves addr_reg |
| 1674 | // unchanged. |
| 1675 | inline void GetMarkBits(Register addr_reg, |
| 1676 | Register bitmap_reg, |
| 1677 | Register mask_reg); |
| 1678 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1679 | // Compute memory operands for safepoint stack slots. |
| 1680 | Operand SafepointRegisterSlot(Register reg); |
| 1681 | static int SafepointRegisterStackIndex(int reg_code) { |
| 1682 | return kNumSafepointRegisters - kSafepointPushRegisterIndices[reg_code] - 1; |
| 1683 | } |
| 1684 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1685 | // Needs access to SafepointRegisterStackIndex for compiled frame |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1686 | // traversal. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1687 | friend class StandardFrame; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1688 | }; |
| 1689 | |
| 1690 | |
| 1691 | // The code patcher is used to patch (typically) small parts of code e.g. for |
| 1692 | // debugging and other types of instrumentation. When using the code patcher |
| 1693 | // the exact number of bytes specified must be emitted. Is not legal to emit |
| 1694 | // relocation information. If any of these constraints are violated it causes |
| 1695 | // an assertion. |
| 1696 | class CodePatcher { |
| 1697 | public: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1698 | CodePatcher(Isolate* isolate, byte* address, int size); |
| 1699 | ~CodePatcher(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1700 | |
| 1701 | // Macro assembler to emit code. |
| 1702 | MacroAssembler* masm() { return &masm_; } |
| 1703 | |
| 1704 | private: |
| 1705 | byte* address_; // The address of the code being patched. |
| 1706 | int size_; // Number of bytes of the expected patch size. |
| 1707 | MacroAssembler masm_; // Macro assembler used to generate the code. |
| 1708 | }; |
| 1709 | |
| 1710 | |
| 1711 | // ----------------------------------------------------------------------------- |
| 1712 | // Static helper functions. |
| 1713 | |
| 1714 | // Generate an Operand for loading a field from an object. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1715 | inline Operand FieldOperand(Register object, int offset) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1716 | return Operand(object, offset - kHeapObjectTag); |
| 1717 | } |
| 1718 | |
| 1719 | |
| 1720 | // Generate an Operand for loading an indexed field from an object. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1721 | inline Operand FieldOperand(Register object, |
| 1722 | Register index, |
| 1723 | ScaleFactor scale, |
| 1724 | int offset) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1725 | return Operand(object, index, scale, offset - kHeapObjectTag); |
| 1726 | } |
| 1727 | |
| 1728 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1729 | inline Operand ContextOperand(Register context, int index) { |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1730 | return Operand(context, Context::SlotOffset(index)); |
| 1731 | } |
| 1732 | |
| 1733 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1734 | inline Operand ContextOperand(Register context, Register index) { |
| 1735 | return Operand(context, index, times_pointer_size, Context::SlotOffset(0)); |
| 1736 | } |
| 1737 | |
| 1738 | |
| 1739 | inline Operand NativeContextOperand() { |
| 1740 | return ContextOperand(rsi, Context::NATIVE_CONTEXT_INDEX); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1741 | } |
| 1742 | |
| 1743 | |
| 1744 | // Provides access to exit frame stack space (not GCed). |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1745 | inline Operand StackSpaceOperand(int index) { |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1746 | #ifdef _WIN64 |
| 1747 | const int kShaddowSpace = 4; |
| 1748 | return Operand(rsp, (index + kShaddowSpace) * kPointerSize); |
| 1749 | #else |
| 1750 | return Operand(rsp, index * kPointerSize); |
| 1751 | #endif |
| 1752 | } |
| 1753 | |
| 1754 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1755 | inline Operand StackOperandForReturnAddress(int32_t disp) { |
| 1756 | return Operand(rsp, disp); |
| 1757 | } |
| 1758 | |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1759 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1760 | #ifdef GENERATED_CODE_COVERAGE |
| 1761 | extern void LogGeneratedCodeCoverage(const char* file_line); |
| 1762 | #define CODE_COVERAGE_STRINGIFY(x) #x |
| 1763 | #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x) |
| 1764 | #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1765 | #define ACCESS_MASM(masm) { \ |
| 1766 | Address x64_coverage_function = FUNCTION_ADDR(LogGeneratedCodeCoverage); \ |
| 1767 | masm->pushfq(); \ |
| 1768 | masm->Pushad(); \ |
| 1769 | masm->Push(Immediate(reinterpret_cast<int>(&__FILE_LINE__))); \ |
| 1770 | masm->Call(x64_coverage_function, RelocInfo::EXTERNAL_REFERENCE); \ |
| 1771 | masm->Pop(rax); \ |
| 1772 | masm->Popad(); \ |
| 1773 | masm->popfq(); \ |
| 1774 | } \ |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1775 | masm-> |
| 1776 | #else |
| 1777 | #define ACCESS_MASM(masm) masm-> |
| 1778 | #endif |
| 1779 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1780 | } // namespace internal |
| 1781 | } // namespace v8 |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1782 | |
| 1783 | #endif // V8_X64_MACRO_ASSEMBLER_X64_H_ |