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. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 4 | |
| 5 | #ifndef V8_MIPS_MACRO_ASSEMBLER_MIPS_H_ |
| 6 | #define V8_MIPS_MACRO_ASSEMBLER_MIPS_H_ |
| 7 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 8 | #include "src/assembler.h" |
| 9 | #include "src/globals.h" |
| 10 | #include "src/mips/assembler-mips.h" |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 11 | |
| 12 | namespace v8 { |
| 13 | namespace internal { |
| 14 | |
| 15 | // Forward declaration. |
| 16 | class JumpTarget; |
| 17 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 18 | // Reserved Register Usage Summary. |
| 19 | // |
| 20 | // Registers t8, t9, and at are reserved for use by the MacroAssembler. |
| 21 | // |
| 22 | // The programmer should know that the MacroAssembler may clobber these three, |
| 23 | // but won't touch other registers except in special cases. |
| 24 | // |
| 25 | // Per the MIPS ABI, register t9 must be used for indirect function call |
| 26 | // via 'jalr t9' or 'jr t9' instructions. This is relied upon by gcc when |
| 27 | // trying to update gp register for position-independent-code. Whenever |
| 28 | // MIPS generated code calls C code, it must be via t9 register. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 29 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 30 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 31 | // Flags used for LeaveExitFrame function. |
| 32 | enum LeaveExitFrameMode { |
| 33 | EMIT_RETURN = true, |
| 34 | NO_EMIT_RETURN = false |
| 35 | }; |
| 36 | |
| 37 | // Flags used for AllocateHeapNumber |
| 38 | enum TaggingMode { |
| 39 | // Tag the result. |
| 40 | TAG_RESULT, |
| 41 | // Don't tag |
| 42 | DONT_TAG_RESULT |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 43 | }; |
| 44 | |
| 45 | // Flags used for the ObjectToDoubleFPURegister function. |
| 46 | enum ObjectToDoubleFlags { |
| 47 | // No special flags. |
| 48 | NO_OBJECT_TO_DOUBLE_FLAGS = 0, |
| 49 | // Object is known to be a non smi. |
| 50 | OBJECT_NOT_SMI = 1 << 0, |
| 51 | // Don't load NaNs or infinities, branch to the non number case instead. |
| 52 | AVOID_NANS_AND_INFINITIES = 1 << 1 |
| 53 | }; |
| 54 | |
| 55 | // Allow programmer to use Branch Delay Slot of Branches, Jumps, Calls. |
| 56 | enum BranchDelaySlot { |
| 57 | USE_DELAY_SLOT, |
| 58 | PROTECT |
| 59 | }; |
| 60 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 61 | // Flags used for the li macro-assembler function. |
| 62 | enum LiFlags { |
| 63 | // If the constant value can be represented in just 16 bits, then |
| 64 | // optimize the li to use a single instruction, rather than lui/ori pair. |
| 65 | OPTIMIZE_SIZE = 0, |
| 66 | // Always use 2 instructions (lui/ori pair), even if the constant could |
| 67 | // be loaded with just one, so that this value is patchable later. |
| 68 | CONSTANT_SIZE = 1 |
| 69 | }; |
| 70 | |
| 71 | |
| 72 | enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET }; |
| 73 | enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK }; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 74 | enum PointersToHereCheck { |
| 75 | kPointersToHereMaybeInteresting, |
| 76 | kPointersToHereAreAlwaysInteresting |
| 77 | }; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 78 | enum RAStatus { kRAHasNotBeenSaved, kRAHasBeenSaved }; |
| 79 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 80 | Register GetRegisterThatIsNotOneOf(Register reg1, |
| 81 | Register reg2 = no_reg, |
| 82 | Register reg3 = no_reg, |
| 83 | Register reg4 = no_reg, |
| 84 | Register reg5 = no_reg, |
| 85 | Register reg6 = no_reg); |
| 86 | |
| 87 | bool AreAliased(Register reg1, |
| 88 | Register reg2, |
| 89 | Register reg3 = no_reg, |
| 90 | Register reg4 = no_reg, |
| 91 | Register reg5 = no_reg, |
| 92 | Register reg6 = no_reg, |
| 93 | Register reg7 = no_reg, |
| 94 | Register reg8 = no_reg); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 95 | |
| 96 | |
| 97 | // ----------------------------------------------------------------------------- |
| 98 | // Static helper functions. |
| 99 | |
| 100 | inline MemOperand ContextOperand(Register context, int index) { |
| 101 | return MemOperand(context, Context::SlotOffset(index)); |
| 102 | } |
| 103 | |
| 104 | |
| 105 | inline MemOperand GlobalObjectOperand() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 106 | return ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | |
| 110 | // Generate a MemOperand for loading a field from an object. |
| 111 | inline MemOperand FieldMemOperand(Register object, int offset) { |
| 112 | return MemOperand(object, offset - kHeapObjectTag); |
| 113 | } |
| 114 | |
| 115 | |
| 116 | // Generate a MemOperand for storing arguments 5..N on the stack |
| 117 | // when calling CallCFunction(). |
| 118 | inline MemOperand CFunctionArgumentOperand(int index) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 119 | DCHECK(index > kCArgSlotCount); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 120 | // Argument 5 takes the slot just past the four Arg-slots. |
| 121 | int offset = (index - 5) * kPointerSize + kCArgsSlotsSize; |
| 122 | return MemOperand(sp, offset); |
| 123 | } |
| 124 | |
| 125 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 126 | // MacroAssembler implements a collection of frequently used macros. |
| 127 | class MacroAssembler: public Assembler { |
| 128 | public: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 129 | // The isolate parameter can be NULL if the macro assembler should |
| 130 | // not use isolate-dependent functionality. In this case, it's the |
| 131 | // responsibility of the caller to never invoke such function on the |
| 132 | // macro assembler. |
| 133 | MacroAssembler(Isolate* isolate, void* buffer, int size); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 134 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 135 | // Arguments macros. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 136 | #define COND_TYPED_ARGS Condition cond, Register r1, const Operand& r2 |
| 137 | #define COND_ARGS cond, r1, r2 |
| 138 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 139 | // Cases when relocation is not needed. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 140 | #define DECLARE_NORELOC_PROTOTYPE(Name, target_type) \ |
| 141 | void Name(target_type target, BranchDelaySlot bd = PROTECT); \ |
| 142 | inline void Name(BranchDelaySlot bd, target_type target) { \ |
| 143 | Name(target, bd); \ |
| 144 | } \ |
| 145 | void Name(target_type target, \ |
| 146 | COND_TYPED_ARGS, \ |
| 147 | BranchDelaySlot bd = PROTECT); \ |
| 148 | inline void Name(BranchDelaySlot bd, \ |
| 149 | target_type target, \ |
| 150 | COND_TYPED_ARGS) { \ |
| 151 | Name(target, COND_ARGS, bd); \ |
| 152 | } |
| 153 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 154 | #define DECLARE_BRANCH_PROTOTYPES(Name) \ |
| 155 | DECLARE_NORELOC_PROTOTYPE(Name, Label*) \ |
| 156 | DECLARE_NORELOC_PROTOTYPE(Name, int16_t) |
| 157 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 158 | DECLARE_BRANCH_PROTOTYPES(Branch) |
| 159 | DECLARE_BRANCH_PROTOTYPES(BranchAndLink) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 160 | DECLARE_BRANCH_PROTOTYPES(BranchShort) |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 161 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 162 | #undef DECLARE_BRANCH_PROTOTYPES |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 163 | #undef COND_TYPED_ARGS |
| 164 | #undef COND_ARGS |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 165 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 166 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 167 | // Jump, Call, and Ret pseudo instructions implementing inter-working. |
| 168 | #define COND_ARGS Condition cond = al, Register rs = zero_reg, \ |
| 169 | const Operand& rt = Operand(zero_reg), BranchDelaySlot bd = PROTECT |
| 170 | |
| 171 | void Jump(Register target, COND_ARGS); |
| 172 | void Jump(intptr_t target, RelocInfo::Mode rmode, COND_ARGS); |
| 173 | void Jump(Address target, RelocInfo::Mode rmode, COND_ARGS); |
| 174 | void Jump(Handle<Code> code, RelocInfo::Mode rmode, COND_ARGS); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 175 | static int CallSize(Register target, COND_ARGS); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 176 | void Call(Register target, COND_ARGS); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 177 | static int CallSize(Address target, RelocInfo::Mode rmode, COND_ARGS); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 178 | void Call(Address target, RelocInfo::Mode rmode, COND_ARGS); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 179 | int CallSize(Handle<Code> code, |
| 180 | RelocInfo::Mode rmode = RelocInfo::CODE_TARGET, |
| 181 | TypeFeedbackId ast_id = TypeFeedbackId::None(), |
| 182 | COND_ARGS); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 183 | void Call(Handle<Code> code, |
| 184 | RelocInfo::Mode rmode = RelocInfo::CODE_TARGET, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 185 | TypeFeedbackId ast_id = TypeFeedbackId::None(), |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 186 | COND_ARGS); |
| 187 | void Ret(COND_ARGS); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 188 | inline void Ret(BranchDelaySlot bd, Condition cond = al, |
| 189 | Register rs = zero_reg, const Operand& rt = Operand(zero_reg)) { |
| 190 | Ret(cond, rs, rt, bd); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 191 | } |
| 192 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 193 | void Branch(Label* L, |
| 194 | Condition cond, |
| 195 | Register rs, |
| 196 | Heap::RootListIndex index, |
| 197 | BranchDelaySlot bdslot = PROTECT); |
| 198 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 199 | #undef COND_ARGS |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 200 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 201 | // Emit code to discard a non-negative number of pointer-sized elements |
| 202 | // from the stack, clobbering only the sp register. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 203 | void Drop(int count, |
| 204 | Condition cond = cc_always, |
| 205 | Register reg = no_reg, |
| 206 | const Operand& op = Operand(no_reg)); |
| 207 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 208 | // Trivial case of DropAndRet that utilizes the delay slot and only emits |
| 209 | // 2 instructions. |
| 210 | void DropAndRet(int drop); |
| 211 | |
| 212 | void DropAndRet(int drop, |
| 213 | Condition cond, |
| 214 | Register reg, |
| 215 | const Operand& op); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 216 | |
| 217 | // Swap two registers. If the scratch register is omitted then a slightly |
| 218 | // less efficient form using xor instead of mov is emitted. |
| 219 | void Swap(Register reg1, Register reg2, Register scratch = no_reg); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 220 | |
| 221 | void Call(Label* target); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 222 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 223 | inline void Move(Register dst, Register src) { |
| 224 | if (!dst.is(src)) { |
| 225 | mov(dst, src); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | inline void Move(FPURegister dst, FPURegister src) { |
| 230 | if (!dst.is(src)) { |
| 231 | mov_d(dst, src); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | inline void Move(Register dst_low, Register dst_high, FPURegister src) { |
| 236 | mfc1(dst_low, src); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 237 | Mfhc1(dst_high, src); |
| 238 | } |
| 239 | |
| 240 | inline void FmoveHigh(Register dst_high, FPURegister src) { |
| 241 | Mfhc1(dst_high, src); |
| 242 | } |
| 243 | |
| 244 | inline void FmoveLow(Register dst_low, FPURegister src) { |
| 245 | mfc1(dst_low, src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | inline void Move(FPURegister dst, Register src_low, Register src_high) { |
| 249 | mtc1(src_low, dst); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 250 | Mthc1(src_high, dst); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 251 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 252 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 253 | // Conditional move. |
| 254 | void Move(FPURegister dst, double imm); |
| 255 | void Movz(Register rd, Register rs, Register rt); |
| 256 | void Movn(Register rd, Register rs, Register rt); |
| 257 | void Movt(Register rd, Register rs, uint16_t cc = 0); |
| 258 | void Movf(Register rd, Register rs, uint16_t cc = 0); |
| 259 | |
| 260 | void Clz(Register rd, Register rs); |
| 261 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 262 | // Jump unconditionally to given label. |
| 263 | // We NEED a nop in the branch delay slot, as it used by v8, for example in |
| 264 | // CodeGenerator::ProcessDeferred(). |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 265 | // Currently the branch delay slot is filled by the MacroAssembler. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 266 | // Use rather b(Label) for code generation. |
| 267 | void jmp(Label* L) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 268 | Branch(L); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 269 | } |
| 270 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 271 | void Load(Register dst, const MemOperand& src, Representation r); |
| 272 | void Store(Register src, const MemOperand& dst, Representation r); |
| 273 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 274 | // Load an object from the root table. |
| 275 | void LoadRoot(Register destination, |
| 276 | Heap::RootListIndex index); |
| 277 | void LoadRoot(Register destination, |
| 278 | Heap::RootListIndex index, |
| 279 | Condition cond, Register src1, const Operand& src2); |
| 280 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 281 | // Store an object to the root table. |
| 282 | void StoreRoot(Register source, |
| 283 | Heap::RootListIndex index); |
| 284 | void StoreRoot(Register source, |
| 285 | Heap::RootListIndex index, |
| 286 | Condition cond, Register src1, const Operand& src2); |
| 287 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 288 | // --------------------------------------------------------------------------- |
| 289 | // GC Support |
| 290 | |
| 291 | void IncrementalMarkingRecordWriteHelper(Register object, |
| 292 | Register value, |
| 293 | Register address); |
| 294 | |
| 295 | enum RememberedSetFinalAction { |
| 296 | kReturnAtEnd, |
| 297 | kFallThroughAtEnd |
| 298 | }; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 299 | |
| 300 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 301 | // Record in the remembered set the fact that we have a pointer to new space |
| 302 | // at the address pointed to by the addr register. Only works if addr is not |
| 303 | // in new space. |
| 304 | void RememberedSetHelper(Register object, // Used for debug code. |
| 305 | Register addr, |
| 306 | Register scratch, |
| 307 | SaveFPRegsMode save_fp, |
| 308 | RememberedSetFinalAction and_then); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 309 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 310 | void CheckPageFlag(Register object, |
| 311 | Register scratch, |
| 312 | int mask, |
| 313 | Condition cc, |
| 314 | Label* condition_met); |
| 315 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 316 | void CheckMapDeprecated(Handle<Map> map, |
| 317 | Register scratch, |
| 318 | Label* if_deprecated); |
| 319 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 320 | // Check if object is in new space. Jumps if the object is not in new space. |
| 321 | // The register scratch can be object itself, but it will be clobbered. |
| 322 | void JumpIfNotInNewSpace(Register object, |
| 323 | Register scratch, |
| 324 | Label* branch) { |
| 325 | InNewSpace(object, scratch, ne, branch); |
| 326 | } |
| 327 | |
| 328 | // Check if object is in new space. Jumps if the object is in new space. |
| 329 | // The register scratch can be object itself, but scratch will be clobbered. |
| 330 | void JumpIfInNewSpace(Register object, |
| 331 | Register scratch, |
| 332 | Label* branch) { |
| 333 | InNewSpace(object, scratch, eq, branch); |
| 334 | } |
| 335 | |
| 336 | // Check if an object has a given incremental marking color. |
| 337 | void HasColor(Register object, |
| 338 | Register scratch0, |
| 339 | Register scratch1, |
| 340 | Label* has_color, |
| 341 | int first_bit, |
| 342 | int second_bit); |
| 343 | |
| 344 | void JumpIfBlack(Register object, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 345 | Register scratch0, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 346 | Register scratch1, |
| 347 | Label* on_black); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 348 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 349 | // Checks the color of an object. If the object is already grey or black |
| 350 | // then we just fall through, since it is already live. If it is white and |
| 351 | // we can determine that it doesn't need to be scanned, then we just mark it |
| 352 | // black and fall through. For the rest we jump to the label so the |
| 353 | // incremental marker can fix its assumptions. |
| 354 | void EnsureNotWhite(Register object, |
| 355 | Register scratch1, |
| 356 | Register scratch2, |
| 357 | Register scratch3, |
| 358 | Label* object_is_white_and_not_data); |
| 359 | |
| 360 | // Detects conservatively whether an object is data-only, i.e. it does need to |
| 361 | // be scanned by the garbage collector. |
| 362 | void JumpIfDataObject(Register value, |
| 363 | Register scratch, |
| 364 | Label* not_data_object); |
| 365 | |
| 366 | // Notify the garbage collector that we wrote a pointer into an object. |
| 367 | // |object| is the object being stored into, |value| is the object being |
| 368 | // stored. value and scratch registers are clobbered by the operation. |
| 369 | // The offset is the offset from the start of the object, not the offset from |
| 370 | // the tagged HeapObject pointer. For use with FieldOperand(reg, off). |
| 371 | void RecordWriteField( |
| 372 | Register object, |
| 373 | int offset, |
| 374 | Register value, |
| 375 | Register scratch, |
| 376 | RAStatus ra_status, |
| 377 | SaveFPRegsMode save_fp, |
| 378 | RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 379 | SmiCheck smi_check = INLINE_SMI_CHECK, |
| 380 | PointersToHereCheck pointers_to_here_check_for_value = |
| 381 | kPointersToHereMaybeInteresting); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 382 | |
| 383 | // As above, but the offset has the tag presubtracted. For use with |
| 384 | // MemOperand(reg, off). |
| 385 | inline void RecordWriteContextSlot( |
| 386 | Register context, |
| 387 | int offset, |
| 388 | Register value, |
| 389 | Register scratch, |
| 390 | RAStatus ra_status, |
| 391 | SaveFPRegsMode save_fp, |
| 392 | RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 393 | SmiCheck smi_check = INLINE_SMI_CHECK, |
| 394 | PointersToHereCheck pointers_to_here_check_for_value = |
| 395 | kPointersToHereMaybeInteresting) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 396 | RecordWriteField(context, |
| 397 | offset + kHeapObjectTag, |
| 398 | value, |
| 399 | scratch, |
| 400 | ra_status, |
| 401 | save_fp, |
| 402 | remembered_set_action, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 403 | smi_check, |
| 404 | pointers_to_here_check_for_value); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 405 | } |
| 406 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 407 | void RecordWriteForMap( |
| 408 | Register object, |
| 409 | Register map, |
| 410 | Register dst, |
| 411 | RAStatus ra_status, |
| 412 | SaveFPRegsMode save_fp); |
| 413 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 414 | // For a given |object| notify the garbage collector that the slot |address| |
| 415 | // has been written. |value| is the object being stored. The value and |
| 416 | // address registers are clobbered by the operation. |
| 417 | void RecordWrite( |
| 418 | Register object, |
| 419 | Register address, |
| 420 | Register value, |
| 421 | RAStatus ra_status, |
| 422 | SaveFPRegsMode save_fp, |
| 423 | RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 424 | SmiCheck smi_check = INLINE_SMI_CHECK, |
| 425 | PointersToHereCheck pointers_to_here_check_for_value = |
| 426 | kPointersToHereMaybeInteresting); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 427 | |
| 428 | |
| 429 | // --------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 430 | // Inline caching support. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 431 | |
| 432 | // Generate code for checking access rights - used for security checks |
| 433 | // on access to global objects across environments. The holder register |
| 434 | // is left untouched, whereas both scratch registers are clobbered. |
| 435 | void CheckAccessGlobalProxy(Register holder_reg, |
| 436 | Register scratch, |
| 437 | Label* miss); |
| 438 | |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 439 | void GetNumberHash(Register reg0, Register scratch); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 440 | |
| 441 | void LoadFromNumberDictionary(Label* miss, |
| 442 | Register elements, |
| 443 | Register key, |
| 444 | Register result, |
| 445 | Register reg0, |
| 446 | Register reg1, |
| 447 | Register reg2); |
| 448 | |
| 449 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 450 | inline void MarkCode(NopMarkerTypes type) { |
| 451 | nop(type); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 452 | } |
| 453 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 454 | // Check if the given instruction is a 'type' marker. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 455 | // i.e. check if it is a sll zero_reg, zero_reg, <type> (referenced as |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 456 | // nop(type)). These instructions are generated to mark special location in |
| 457 | // the code, like some special IC code. |
| 458 | static inline bool IsMarkedCode(Instr instr, int type) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 459 | DCHECK((FIRST_IC_MARKER <= type) && (type < LAST_CODE_MARKER)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 460 | return IsNop(instr, type); |
| 461 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 462 | |
| 463 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 464 | static inline int GetCodeMarker(Instr instr) { |
| 465 | uint32_t opcode = ((instr & kOpcodeMask)); |
| 466 | uint32_t rt = ((instr & kRtFieldMask) >> kRtShift); |
| 467 | uint32_t rs = ((instr & kRsFieldMask) >> kRsShift); |
| 468 | uint32_t sa = ((instr & kSaFieldMask) >> kSaShift); |
| 469 | |
| 470 | // Return <n> if we have a sll zero_reg, zero_reg, n |
| 471 | // else return -1. |
| 472 | bool sllzz = (opcode == SLL && |
| 473 | rt == static_cast<uint32_t>(ToNumber(zero_reg)) && |
| 474 | rs == static_cast<uint32_t>(ToNumber(zero_reg))); |
| 475 | int type = |
| 476 | (sllzz && FIRST_IC_MARKER <= sa && sa < LAST_CODE_MARKER) ? sa : -1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 477 | DCHECK((type == -1) || |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 478 | ((FIRST_IC_MARKER <= type) && (type < LAST_CODE_MARKER))); |
| 479 | return type; |
| 480 | } |
| 481 | |
| 482 | |
| 483 | |
| 484 | // --------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 485 | // Allocation support. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 486 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 487 | // Allocate an object in new space or old pointer space. The object_size is |
| 488 | // specified either in bytes or in words if the allocation flag SIZE_IN_WORDS |
| 489 | // is passed. If the space is exhausted control continues at the gc_required |
| 490 | // label. The allocated object is returned in result. If the flag |
| 491 | // tag_allocated_object is true the result is tagged as as a heap object. |
| 492 | // All registers are clobbered also when control continues at the gc_required |
| 493 | // label. |
| 494 | void Allocate(int object_size, |
| 495 | Register result, |
| 496 | Register scratch1, |
| 497 | Register scratch2, |
| 498 | Label* gc_required, |
| 499 | AllocationFlags flags); |
| 500 | |
| 501 | void Allocate(Register object_size, |
| 502 | Register result, |
| 503 | Register scratch1, |
| 504 | Register scratch2, |
| 505 | Label* gc_required, |
| 506 | AllocationFlags flags); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 507 | |
| 508 | // Undo allocation in new space. The object passed and objects allocated after |
| 509 | // it will no longer be allocated. The caller must make sure that no pointers |
| 510 | // are left to the object(s) no longer allocated as they would be invalid when |
| 511 | // allocation is undone. |
| 512 | void UndoAllocationInNewSpace(Register object, Register scratch); |
| 513 | |
| 514 | |
| 515 | void AllocateTwoByteString(Register result, |
| 516 | Register length, |
| 517 | Register scratch1, |
| 518 | Register scratch2, |
| 519 | Register scratch3, |
| 520 | Label* gc_required); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 521 | void AllocateOneByteString(Register result, Register length, |
| 522 | Register scratch1, Register scratch2, |
| 523 | Register scratch3, Label* gc_required); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 524 | void AllocateTwoByteConsString(Register result, |
| 525 | Register length, |
| 526 | Register scratch1, |
| 527 | Register scratch2, |
| 528 | Label* gc_required); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 529 | void AllocateOneByteConsString(Register result, Register length, |
| 530 | Register scratch1, Register scratch2, |
| 531 | Label* gc_required); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 532 | void AllocateTwoByteSlicedString(Register result, |
| 533 | Register length, |
| 534 | Register scratch1, |
| 535 | Register scratch2, |
| 536 | Label* gc_required); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 537 | void AllocateOneByteSlicedString(Register result, Register length, |
| 538 | Register scratch1, Register scratch2, |
| 539 | Label* gc_required); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 540 | |
| 541 | // Allocates a heap number or jumps to the gc_required label if the young |
| 542 | // space is full and a scavenge is needed. All registers are clobbered also |
| 543 | // when control continues at the gc_required label. |
| 544 | void AllocateHeapNumber(Register result, |
| 545 | Register scratch1, |
| 546 | Register scratch2, |
| 547 | Register heap_number_map, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 548 | Label* gc_required, |
| 549 | TaggingMode tagging_mode = TAG_RESULT, |
| 550 | MutableMode mode = IMMUTABLE); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 551 | void AllocateHeapNumberWithValue(Register result, |
| 552 | FPURegister value, |
| 553 | Register scratch1, |
| 554 | Register scratch2, |
| 555 | Label* gc_required); |
| 556 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 557 | // --------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 558 | // Instruction macros. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 559 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 560 | #define DEFINE_INSTRUCTION(instr) \ |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 561 | void instr(Register rd, Register rs, const Operand& rt); \ |
| 562 | void instr(Register rd, Register rs, Register rt) { \ |
| 563 | instr(rd, rs, Operand(rt)); \ |
| 564 | } \ |
| 565 | void instr(Register rs, Register rt, int32_t j) { \ |
| 566 | instr(rs, rt, Operand(j)); \ |
| 567 | } |
| 568 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 569 | #define DEFINE_INSTRUCTION2(instr) \ |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 570 | void instr(Register rs, const Operand& rt); \ |
| 571 | void instr(Register rs, Register rt) { \ |
| 572 | instr(rs, Operand(rt)); \ |
| 573 | } \ |
| 574 | void instr(Register rs, int32_t j) { \ |
| 575 | instr(rs, Operand(j)); \ |
| 576 | } |
| 577 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 578 | #define DEFINE_INSTRUCTION3(instr) \ |
| 579 | void instr(Register rd_hi, Register rd_lo, Register rs, const Operand& rt); \ |
| 580 | void instr(Register rd_hi, Register rd_lo, Register rs, Register rt) { \ |
| 581 | instr(rd_hi, rd_lo, rs, Operand(rt)); \ |
| 582 | } \ |
| 583 | void instr(Register rd_hi, Register rd_lo, Register rs, int32_t j) { \ |
| 584 | instr(rd_hi, rd_lo, rs, Operand(j)); \ |
| 585 | } |
| 586 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 587 | DEFINE_INSTRUCTION(Addu); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 588 | DEFINE_INSTRUCTION(Subu); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 589 | DEFINE_INSTRUCTION(Mul); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 590 | DEFINE_INSTRUCTION(Mod); |
| 591 | DEFINE_INSTRUCTION(Mulh); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 592 | DEFINE_INSTRUCTION2(Mult); |
| 593 | DEFINE_INSTRUCTION2(Multu); |
| 594 | DEFINE_INSTRUCTION2(Div); |
| 595 | DEFINE_INSTRUCTION2(Divu); |
| 596 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 597 | DEFINE_INSTRUCTION3(Div); |
| 598 | DEFINE_INSTRUCTION3(Mul); |
| 599 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 600 | DEFINE_INSTRUCTION(And); |
| 601 | DEFINE_INSTRUCTION(Or); |
| 602 | DEFINE_INSTRUCTION(Xor); |
| 603 | DEFINE_INSTRUCTION(Nor); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 604 | DEFINE_INSTRUCTION2(Neg); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 605 | |
| 606 | DEFINE_INSTRUCTION(Slt); |
| 607 | DEFINE_INSTRUCTION(Sltu); |
| 608 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 609 | // MIPS32 R2 instruction macro. |
| 610 | DEFINE_INSTRUCTION(Ror); |
| 611 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 612 | #undef DEFINE_INSTRUCTION |
| 613 | #undef DEFINE_INSTRUCTION2 |
| 614 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 615 | void Pref(int32_t hint, const MemOperand& rs); |
| 616 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 617 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 618 | // --------------------------------------------------------------------------- |
| 619 | // Pseudo-instructions. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 620 | |
| 621 | void mov(Register rd, Register rt) { or_(rd, rt, zero_reg); } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 622 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 623 | void Ulw(Register rd, const MemOperand& rs); |
| 624 | void Usw(Register rd, const MemOperand& rs); |
| 625 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 626 | // Load int32 in the rd register. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 627 | void li(Register rd, Operand j, LiFlags mode = OPTIMIZE_SIZE); |
| 628 | inline void li(Register rd, int32_t j, LiFlags mode = OPTIMIZE_SIZE) { |
| 629 | li(rd, Operand(j), mode); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 630 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 631 | void li(Register dst, Handle<Object> value, LiFlags mode = OPTIMIZE_SIZE); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 632 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 633 | // Push multiple registers on the stack. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 634 | // Registers are saved in numerical order, with higher numbered registers |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 635 | // saved in higher memory addresses. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 636 | void MultiPush(RegList regs); |
| 637 | void MultiPushReversed(RegList regs); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 638 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 639 | void MultiPushFPU(RegList regs); |
| 640 | void MultiPushReversedFPU(RegList regs); |
| 641 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 642 | void push(Register src) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 643 | Addu(sp, sp, Operand(-kPointerSize)); |
| 644 | sw(src, MemOperand(sp, 0)); |
| 645 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 646 | void Push(Register src) { push(src); } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 647 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 648 | // Push a handle. |
| 649 | void Push(Handle<Object> handle); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 650 | void Push(Smi* smi) { Push(Handle<Smi>(smi, isolate())); } |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 651 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 652 | // Push two registers. Pushes leftmost register first (to highest address). |
| 653 | void Push(Register src1, Register src2) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 654 | Subu(sp, sp, Operand(2 * kPointerSize)); |
| 655 | sw(src1, MemOperand(sp, 1 * kPointerSize)); |
| 656 | sw(src2, MemOperand(sp, 0 * kPointerSize)); |
| 657 | } |
| 658 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 659 | // Push three registers. Pushes leftmost register first (to highest address). |
| 660 | void Push(Register src1, Register src2, Register src3) { |
| 661 | Subu(sp, sp, Operand(3 * kPointerSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 662 | sw(src1, MemOperand(sp, 2 * kPointerSize)); |
| 663 | sw(src2, MemOperand(sp, 1 * kPointerSize)); |
| 664 | sw(src3, MemOperand(sp, 0 * kPointerSize)); |
| 665 | } |
| 666 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 667 | // Push four registers. Pushes leftmost register first (to highest address). |
| 668 | void Push(Register src1, Register src2, Register src3, Register src4) { |
| 669 | Subu(sp, sp, Operand(4 * kPointerSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 670 | sw(src1, MemOperand(sp, 3 * kPointerSize)); |
| 671 | sw(src2, MemOperand(sp, 2 * kPointerSize)); |
| 672 | sw(src3, MemOperand(sp, 1 * kPointerSize)); |
| 673 | sw(src4, MemOperand(sp, 0 * kPointerSize)); |
| 674 | } |
| 675 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 676 | void Push(Register src, Condition cond, Register tst1, Register tst2) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 677 | // Since we don't have conditional execution we use a Branch. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 678 | Branch(3, cond, tst1, Operand(tst2)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 679 | Subu(sp, sp, Operand(kPointerSize)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 680 | sw(src, MemOperand(sp, 0)); |
| 681 | } |
| 682 | |
| 683 | // Pops multiple values from the stack and load them in the |
| 684 | // registers specified in regs. Pop order is the opposite as in MultiPush. |
| 685 | void MultiPop(RegList regs); |
| 686 | void MultiPopReversed(RegList regs); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 687 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 688 | void MultiPopFPU(RegList regs); |
| 689 | void MultiPopReversedFPU(RegList regs); |
| 690 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 691 | void pop(Register dst) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 692 | lw(dst, MemOperand(sp, 0)); |
| 693 | Addu(sp, sp, Operand(kPointerSize)); |
| 694 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 695 | void Pop(Register dst) { pop(dst); } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 696 | |
| 697 | // Pop two registers. Pops rightmost register first (from lower address). |
| 698 | void Pop(Register src1, Register src2) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 699 | DCHECK(!src1.is(src2)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 700 | lw(src2, MemOperand(sp, 0 * kPointerSize)); |
| 701 | lw(src1, MemOperand(sp, 1 * kPointerSize)); |
| 702 | Addu(sp, sp, 2 * kPointerSize); |
| 703 | } |
| 704 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 705 | // Pop three registers. Pops rightmost register first (from lower address). |
| 706 | void Pop(Register src1, Register src2, Register src3) { |
| 707 | lw(src3, MemOperand(sp, 0 * kPointerSize)); |
| 708 | lw(src2, MemOperand(sp, 1 * kPointerSize)); |
| 709 | lw(src1, MemOperand(sp, 2 * kPointerSize)); |
| 710 | Addu(sp, sp, 3 * kPointerSize); |
| 711 | } |
| 712 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 713 | void Pop(uint32_t count = 1) { |
| 714 | Addu(sp, sp, Operand(count * kPointerSize)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 715 | } |
| 716 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 717 | // Push and pop the registers that can hold pointers, as defined by the |
| 718 | // RegList constant kSafepointSavedRegisters. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 719 | void PushSafepointRegisters(); |
| 720 | void PopSafepointRegisters(); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 721 | // Store value in register src in the safepoint stack slot for |
| 722 | // register dst. |
| 723 | void StoreToSafepointRegisterSlot(Register src, Register dst); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 724 | // Load the value of the src register from its safepoint stack slot |
| 725 | // into register dst. |
| 726 | void LoadFromSafepointRegisterSlot(Register dst, Register src); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 727 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 728 | // Flush the I-cache from asm code. You should use CpuFeatures::FlushICache |
| 729 | // from C. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 730 | // Does not handle errors. |
| 731 | void FlushICache(Register address, unsigned instructions); |
| 732 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 733 | // MIPS32 R2 instruction macro. |
| 734 | void Ins(Register rt, Register rs, uint16_t pos, uint16_t size); |
| 735 | void Ext(Register rt, Register rs, uint16_t pos, uint16_t size); |
| 736 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 737 | // --------------------------------------------------------------------------- |
| 738 | // FPU macros. These do not handle special cases like NaN or +- inf. |
| 739 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 740 | // Convert unsigned word to double. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 741 | void Cvt_d_uw(FPURegister fd, FPURegister fs, FPURegister scratch); |
| 742 | void Cvt_d_uw(FPURegister fd, Register rs, FPURegister scratch); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 743 | |
| 744 | // Convert double to unsigned word. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 745 | void Trunc_uw_d(FPURegister fd, FPURegister fs, FPURegister scratch); |
| 746 | void Trunc_uw_d(FPURegister fd, Register rs, FPURegister scratch); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 747 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 748 | void Trunc_w_d(FPURegister fd, FPURegister fs); |
| 749 | void Round_w_d(FPURegister fd, FPURegister fs); |
| 750 | void Floor_w_d(FPURegister fd, FPURegister fs); |
| 751 | void Ceil_w_d(FPURegister fd, FPURegister fs); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 752 | |
| 753 | // FP32 mode: Move the general purpose register into |
| 754 | // the high part of the double-register pair. |
| 755 | // FP64 mode: Move the general-purpose register into |
| 756 | // the higher 32 bits of the 64-bit coprocessor register, |
| 757 | // while leaving the low bits unchanged. |
| 758 | void Mthc1(Register rt, FPURegister fs); |
| 759 | |
| 760 | // FP32 mode: move the high part of the double-register pair into |
| 761 | // general purpose register. |
| 762 | // FP64 mode: Move the higher 32 bits of the 64-bit coprocessor register into |
| 763 | // general-purpose register. |
| 764 | void Mfhc1(Register rt, FPURegister fs); |
| 765 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 766 | // Wrapper function for the different cmp/branch types. |
| 767 | void BranchF(Label* target, |
| 768 | Label* nan, |
| 769 | Condition cc, |
| 770 | FPURegister cmp1, |
| 771 | FPURegister cmp2, |
| 772 | BranchDelaySlot bd = PROTECT); |
| 773 | |
| 774 | // Alternate (inline) version for better readability with USE_DELAY_SLOT. |
| 775 | inline void BranchF(BranchDelaySlot bd, |
| 776 | Label* target, |
| 777 | Label* nan, |
| 778 | Condition cc, |
| 779 | FPURegister cmp1, |
| 780 | FPURegister cmp2) { |
| 781 | BranchF(target, nan, cc, cmp1, cmp2, bd); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 782 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 783 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 784 | // Truncates a double using a specific rounding mode, and writes the value |
| 785 | // to the result register. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 786 | // The except_flag will contain any exceptions caused by the instruction. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 787 | // If check_inexact is kDontCheckForInexactConversion, then the inexact |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 788 | // exception is masked. |
| 789 | void EmitFPUTruncate(FPURoundingMode rounding_mode, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 790 | Register result, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 791 | DoubleRegister double_input, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 792 | Register scratch, |
| 793 | DoubleRegister double_scratch, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 794 | Register except_flag, |
| 795 | CheckForInexactConversion check_inexact |
| 796 | = kDontCheckForInexactConversion); |
| 797 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 798 | // Performs a truncating conversion of a floating point number as used by |
| 799 | // the JS bitwise operations. See ECMA-262 9.5: ToInt32. Goes to 'done' if it |
| 800 | // succeeds, otherwise falls through if result is saturated. On return |
| 801 | // 'result' either holds answer, or is clobbered on fall through. |
| 802 | // |
| 803 | // Only public for the test code in test-code-stubs-arm.cc. |
| 804 | void TryInlineTruncateDoubleToI(Register result, |
| 805 | DoubleRegister input, |
| 806 | Label* done); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 807 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 808 | // Performs a truncating conversion of a floating point number as used by |
| 809 | // the JS bitwise operations. See ECMA-262 9.5: ToInt32. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 810 | // Exits with 'result' holding the answer. |
| 811 | void TruncateDoubleToI(Register result, DoubleRegister double_input); |
| 812 | |
| 813 | // Performs a truncating conversion of a heap number as used by |
| 814 | // the JS bitwise operations. See ECMA-262 9.5: ToInt32. 'result' and 'input' |
| 815 | // must be different registers. Exits with 'result' holding the answer. |
| 816 | void TruncateHeapNumberToI(Register result, Register object); |
| 817 | |
| 818 | // Converts the smi or heap number in object to an int32 using the rules |
| 819 | // for ToInt32 as described in ECMAScript 9.5.: the value is truncated |
| 820 | // and brought into the range -2^31 .. +2^31 - 1. 'result' and 'input' must be |
| 821 | // different registers. |
| 822 | void TruncateNumberToI(Register object, |
| 823 | Register result, |
| 824 | Register heap_number_map, |
| 825 | Register scratch, |
| 826 | Label* not_int32); |
| 827 | |
| 828 | // Loads the number from object into dst register. |
| 829 | // If |object| is neither smi nor heap number, |not_number| is jumped to |
| 830 | // with |object| still intact. |
| 831 | void LoadNumber(Register object, |
| 832 | FPURegister dst, |
| 833 | Register heap_number_map, |
| 834 | Register scratch, |
| 835 | Label* not_number); |
| 836 | |
| 837 | // Loads the number from object into double_dst in the double format. |
| 838 | // Control will jump to not_int32 if the value cannot be exactly represented |
| 839 | // by a 32-bit integer. |
| 840 | // Floating point value in the 32-bit integer range that are not exact integer |
| 841 | // won't be loaded. |
| 842 | void LoadNumberAsInt32Double(Register object, |
| 843 | DoubleRegister double_dst, |
| 844 | Register heap_number_map, |
| 845 | Register scratch1, |
| 846 | Register scratch2, |
| 847 | FPURegister double_scratch, |
| 848 | Label* not_int32); |
| 849 | |
| 850 | // Loads the number from object into dst as a 32-bit integer. |
| 851 | // Control will jump to not_int32 if the object cannot be exactly represented |
| 852 | // by a 32-bit integer. |
| 853 | // Floating point value in the 32-bit integer range that are not exact integer |
| 854 | // won't be converted. |
| 855 | void LoadNumberAsInt32(Register object, |
| 856 | Register dst, |
| 857 | Register heap_number_map, |
| 858 | Register scratch1, |
| 859 | Register scratch2, |
| 860 | FPURegister double_scratch0, |
| 861 | FPURegister double_scratch1, |
| 862 | Label* not_int32); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 863 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 864 | // Enter exit frame. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 865 | // argc - argument count to be dropped by LeaveExitFrame. |
| 866 | // save_doubles - saves FPU registers on stack, currently disabled. |
| 867 | // stack_space - extra stack space. |
| 868 | void EnterExitFrame(bool save_doubles, |
| 869 | int stack_space = 0); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 870 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 871 | // Leave the current exit frame. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 872 | void LeaveExitFrame(bool save_doubles, |
| 873 | Register arg_count, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 874 | bool restore_context, |
| 875 | bool do_return = NO_EMIT_RETURN); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 876 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 877 | // Get the actual activation frame alignment for target environment. |
| 878 | static int ActivationFrameAlignment(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 879 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 880 | // Make sure the stack is aligned. Only emits code in debug mode. |
| 881 | void AssertStackIsAligned(); |
| 882 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 883 | void LoadContext(Register dst, int context_chain_length); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 884 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 885 | // Conditionally load the cached Array transitioned map of type |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 886 | // transitioned_kind from the native context if the map in register |
| 887 | // 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] | 888 | // expected_kind. |
| 889 | void LoadTransitionedArrayMapConditional( |
| 890 | ElementsKind expected_kind, |
| 891 | ElementsKind transitioned_kind, |
| 892 | Register map_in_out, |
| 893 | Register scratch, |
| 894 | Label* no_map_match); |
| 895 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 896 | void LoadGlobalFunction(int index, Register function); |
| 897 | |
| 898 | // Load the initial map from the global function. The registers |
| 899 | // function and map can be the same, function is then overwritten. |
| 900 | void LoadGlobalFunctionInitialMap(Register function, |
| 901 | Register map, |
| 902 | Register scratch); |
| 903 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 904 | void InitializeRootRegister() { |
| 905 | ExternalReference roots_array_start = |
| 906 | ExternalReference::roots_array_start(isolate()); |
| 907 | li(kRootRegister, Operand(roots_array_start)); |
| 908 | } |
| 909 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 910 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 911 | // JavaScript invokes. |
| 912 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 913 | // Invoke the JavaScript function code by either calling or jumping. |
| 914 | void InvokeCode(Register code, |
| 915 | const ParameterCount& expected, |
| 916 | const ParameterCount& actual, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 917 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 918 | const CallWrapper& call_wrapper); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 919 | |
| 920 | // Invoke the JavaScript function in the given register. Changes the |
| 921 | // current context to the context in the function before invoking. |
| 922 | void InvokeFunction(Register function, |
| 923 | const ParameterCount& actual, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 924 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 925 | const CallWrapper& call_wrapper); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 926 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 927 | void InvokeFunction(Register function, |
| 928 | const ParameterCount& expected, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 929 | const ParameterCount& actual, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 930 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 931 | const CallWrapper& call_wrapper); |
| 932 | |
| 933 | void InvokeFunction(Handle<JSFunction> function, |
| 934 | const ParameterCount& expected, |
| 935 | const ParameterCount& actual, |
| 936 | InvokeFlag flag, |
| 937 | const CallWrapper& call_wrapper); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 938 | |
| 939 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 940 | void IsObjectJSObjectType(Register heap_object, |
| 941 | Register map, |
| 942 | Register scratch, |
| 943 | Label* fail); |
| 944 | |
| 945 | void IsInstanceJSObjectType(Register map, |
| 946 | Register scratch, |
| 947 | Label* fail); |
| 948 | |
| 949 | void IsObjectJSStringType(Register object, |
| 950 | Register scratch, |
| 951 | Label* fail); |
| 952 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 953 | void IsObjectNameType(Register object, |
| 954 | Register scratch, |
| 955 | Label* fail); |
| 956 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 957 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 958 | // Debugger Support. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 959 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 960 | void DebugBreak(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 961 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 962 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 963 | // Exception handling. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 964 | |
| 965 | // Push a new try handler and link into try handler chain. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 966 | void PushTryHandler(StackHandler::Kind kind, int handler_index); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 967 | |
| 968 | // Unlink the stack handler on top of the stack from the try handler chain. |
| 969 | // Must preserve the result register. |
| 970 | void PopTryHandler(); |
| 971 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 972 | // Passes thrown value to the handler of top of the try handler chain. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 973 | void Throw(Register value); |
| 974 | |
| 975 | // Propagates an uncatchable exception to the top of the current JS stack's |
| 976 | // handler chain. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 977 | void ThrowUncatchable(Register value); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 978 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 979 | // Copies a fixed number of fields of heap objects from src to dst. |
| 980 | void CopyFields(Register dst, Register src, RegList temps, int field_count); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 981 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 982 | // Copies a number of bytes from src to dst. All registers are clobbered. On |
| 983 | // exit src and dst will point to the place just after where the last byte was |
| 984 | // read or written and length will be zero. |
| 985 | void CopyBytes(Register src, |
| 986 | Register dst, |
| 987 | Register length, |
| 988 | Register scratch); |
| 989 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 990 | // Initialize fields with filler values. Fields starting at |start_offset| |
| 991 | // not including end_offset are overwritten with the value in |filler|. At |
| 992 | // the end the loop, |start_offset| takes the value of |end_offset|. |
| 993 | void InitializeFieldsWithFiller(Register start_offset, |
| 994 | Register end_offset, |
| 995 | Register filler); |
| 996 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 997 | // ------------------------------------------------------------------------- |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 998 | // Support functions. |
| 999 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1000 | // Try to get function prototype of a function and puts the value in |
| 1001 | // the result register. Checks that the function really is a |
| 1002 | // function and jumps to the miss label if the fast checks fail. The |
| 1003 | // function register will be untouched; the other registers may be |
| 1004 | // clobbered. |
| 1005 | void TryGetFunctionPrototype(Register function, |
| 1006 | Register result, |
| 1007 | Register scratch, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1008 | Label* miss, |
| 1009 | bool miss_on_bound_function = false); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1010 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1011 | void GetObjectType(Register function, |
| 1012 | Register map, |
| 1013 | Register type_reg); |
| 1014 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1015 | // Check if a map for a JSObject indicates that the object has fast elements. |
| 1016 | // Jump to the specified label if it does not. |
| 1017 | void CheckFastElements(Register map, |
| 1018 | Register scratch, |
| 1019 | Label* fail); |
| 1020 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1021 | // Check if a map for a JSObject indicates that the object can have both smi |
| 1022 | // and HeapObject elements. Jump to the specified label if it does not. |
| 1023 | void CheckFastObjectElements(Register map, |
| 1024 | Register scratch, |
| 1025 | Label* fail); |
| 1026 | |
| 1027 | // Check if a map for a JSObject indicates that the object has fast smi only |
| 1028 | // elements. Jump to the specified label if it does not. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1029 | void CheckFastSmiElements(Register map, |
| 1030 | Register scratch, |
| 1031 | Label* fail); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1032 | |
| 1033 | // Check to see if maybe_number can be stored as a double in |
| 1034 | // FastDoubleElements. If it can, store it at the index specified by key in |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1035 | // the FastDoubleElements array elements. Otherwise jump to fail. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1036 | void StoreNumberToDoubleElements(Register value_reg, |
| 1037 | Register key_reg, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1038 | Register elements_reg, |
| 1039 | Register scratch1, |
| 1040 | Register scratch2, |
| 1041 | Register scratch3, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1042 | Label* fail, |
| 1043 | int elements_offset = 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1044 | |
| 1045 | // Compare an object's map with the specified map and its transitioned |
| 1046 | // elements maps if mode is ALLOW_ELEMENT_TRANSITION_MAPS. Jumps to |
| 1047 | // "branch_to" if the result of the comparison is "cond". If multiple map |
| 1048 | // compares are required, the compare sequences branches to early_success. |
| 1049 | void CompareMapAndBranch(Register obj, |
| 1050 | Register scratch, |
| 1051 | Handle<Map> map, |
| 1052 | Label* early_success, |
| 1053 | Condition cond, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1054 | Label* branch_to); |
| 1055 | |
| 1056 | // As above, but the map of the object is already loaded into the register |
| 1057 | // which is preserved by the code generated. |
| 1058 | void CompareMapAndBranch(Register obj_map, |
| 1059 | Handle<Map> map, |
| 1060 | Label* early_success, |
| 1061 | Condition cond, |
| 1062 | Label* branch_to); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1063 | |
| 1064 | // Check if the map of an object is equal to a specified map and branch to |
| 1065 | // label if not. Skip the smi check if not required (object is known to be a |
| 1066 | // heap object). If mode is ALLOW_ELEMENT_TRANSITION_MAPS, then also match |
| 1067 | // against maps that are ElementsKind transition maps of the specificed map. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1068 | void CheckMap(Register obj, |
| 1069 | Register scratch, |
| 1070 | Handle<Map> map, |
| 1071 | Label* fail, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1072 | SmiCheckType smi_check_type); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1073 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1074 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1075 | void CheckMap(Register obj, |
| 1076 | Register scratch, |
| 1077 | Heap::RootListIndex index, |
| 1078 | Label* fail, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1079 | SmiCheckType smi_check_type); |
| 1080 | |
| 1081 | // Check if the map of an object is equal to a specified map and branch to a |
| 1082 | // specified target if equal. Skip the smi check if not required (object is |
| 1083 | // known to be a heap object) |
| 1084 | void DispatchMap(Register obj, |
| 1085 | Register scratch, |
| 1086 | Handle<Map> map, |
| 1087 | Handle<Code> success, |
| 1088 | SmiCheckType smi_check_type); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1089 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1090 | |
| 1091 | // Load and check the instance type of an object for being a string. |
| 1092 | // Loads the type into the second argument register. |
| 1093 | // Returns a condition that will be enabled if the object was a string. |
| 1094 | Condition IsObjectStringType(Register obj, |
| 1095 | Register type, |
| 1096 | Register result) { |
| 1097 | lw(type, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| 1098 | lbu(type, FieldMemOperand(type, Map::kInstanceTypeOffset)); |
| 1099 | And(type, type, Operand(kIsNotStringMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1100 | DCHECK_EQ(0, kStringTag); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1101 | return eq; |
| 1102 | } |
| 1103 | |
| 1104 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1105 | // Picks out an array index from the hash field. |
| 1106 | // Register use: |
| 1107 | // hash - holds the index's hash. Clobbered. |
| 1108 | // index - holds the overwritten index on exit. |
| 1109 | void IndexFromHash(Register hash, Register index); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1110 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1111 | // Get the number of least significant bits from a register. |
| 1112 | void GetLeastBitsFromSmi(Register dst, Register src, int num_least_bits); |
| 1113 | void GetLeastBitsFromInt32(Register dst, Register src, int mun_least_bits); |
| 1114 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1115 | // Load the value of a number object into a FPU double register. If the |
| 1116 | // object is not a number a jump to the label not_number is performed |
| 1117 | // and the FPU double register is unchanged. |
| 1118 | void ObjectToDoubleFPURegister( |
| 1119 | Register object, |
| 1120 | FPURegister value, |
| 1121 | Register scratch1, |
| 1122 | Register scratch2, |
| 1123 | Register heap_number_map, |
| 1124 | Label* not_number, |
| 1125 | ObjectToDoubleFlags flags = NO_OBJECT_TO_DOUBLE_FLAGS); |
| 1126 | |
| 1127 | // Load the value of a smi object into a FPU double register. The register |
| 1128 | // scratch1 can be the same register as smi in which case smi will hold the |
| 1129 | // untagged value afterwards. |
| 1130 | void SmiToDoubleFPURegister(Register smi, |
| 1131 | FPURegister value, |
| 1132 | Register scratch1); |
| 1133 | |
| 1134 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1135 | // Overflow handling functions. |
| 1136 | // Usage: first call the appropriate arithmetic function, then call one of the |
| 1137 | // jump functions with the overflow_dst register as the second parameter. |
| 1138 | |
| 1139 | void AdduAndCheckForOverflow(Register dst, |
| 1140 | Register left, |
| 1141 | Register right, |
| 1142 | Register overflow_dst, |
| 1143 | Register scratch = at); |
| 1144 | |
| 1145 | void SubuAndCheckForOverflow(Register dst, |
| 1146 | Register left, |
| 1147 | Register right, |
| 1148 | Register overflow_dst, |
| 1149 | Register scratch = at); |
| 1150 | |
| 1151 | void BranchOnOverflow(Label* label, |
| 1152 | Register overflow_check, |
| 1153 | BranchDelaySlot bd = PROTECT) { |
| 1154 | Branch(label, lt, overflow_check, Operand(zero_reg), bd); |
| 1155 | } |
| 1156 | |
| 1157 | void BranchOnNoOverflow(Label* label, |
| 1158 | Register overflow_check, |
| 1159 | BranchDelaySlot bd = PROTECT) { |
| 1160 | Branch(label, ge, overflow_check, Operand(zero_reg), bd); |
| 1161 | } |
| 1162 | |
| 1163 | void RetOnOverflow(Register overflow_check, BranchDelaySlot bd = PROTECT) { |
| 1164 | Ret(lt, overflow_check, Operand(zero_reg), bd); |
| 1165 | } |
| 1166 | |
| 1167 | void RetOnNoOverflow(Register overflow_check, BranchDelaySlot bd = PROTECT) { |
| 1168 | Ret(ge, overflow_check, Operand(zero_reg), bd); |
| 1169 | } |
| 1170 | |
| 1171 | // ------------------------------------------------------------------------- |
| 1172 | // Runtime calls. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1173 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1174 | // See comments at the beginning of CEntryStub::Generate. |
| 1175 | inline void PrepareCEntryArgs(int num_args) { |
| 1176 | li(s0, num_args); |
| 1177 | li(s1, (num_args - 1) * kPointerSize); |
| 1178 | } |
Ben Murdoch | 85b7179 | 2012-04-11 18:30:58 +0100 | [diff] [blame] | 1179 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1180 | inline void PrepareCEntryFunction(const ExternalReference& ref) { |
| 1181 | li(s2, Operand(ref)); |
| 1182 | } |
| 1183 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1184 | #define COND_ARGS Condition cond = al, Register rs = zero_reg, \ |
| 1185 | const Operand& rt = Operand(zero_reg), BranchDelaySlot bd = PROTECT |
| 1186 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1187 | // Call a code stub. |
| 1188 | void CallStub(CodeStub* stub, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1189 | TypeFeedbackId ast_id = TypeFeedbackId::None(), |
| 1190 | COND_ARGS); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1191 | |
| 1192 | // Tail call a code stub (jump). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1193 | void TailCallStub(CodeStub* stub, COND_ARGS); |
| 1194 | |
| 1195 | #undef COND_ARGS |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1196 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1197 | void CallJSExitStub(CodeStub* stub); |
| 1198 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1199 | // Call a runtime routine. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1200 | void CallRuntime(const Runtime::Function* f, |
| 1201 | int num_arguments, |
| 1202 | SaveFPRegsMode save_doubles = kDontSaveFPRegs); |
| 1203 | void CallRuntimeSaveDoubles(Runtime::FunctionId id) { |
| 1204 | const Runtime::Function* function = Runtime::FunctionForId(id); |
| 1205 | CallRuntime(function, function->nargs, kSaveFPRegs); |
| 1206 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1207 | |
| 1208 | // Convenience function: Same as above, but takes the fid instead. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1209 | void CallRuntime(Runtime::FunctionId id, |
| 1210 | int num_arguments, |
| 1211 | SaveFPRegsMode save_doubles = kDontSaveFPRegs) { |
| 1212 | CallRuntime(Runtime::FunctionForId(id), num_arguments, save_doubles); |
| 1213 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1214 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1215 | // Convenience function: call an external reference. |
| 1216 | void CallExternalReference(const ExternalReference& ext, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1217 | int num_arguments, |
| 1218 | BranchDelaySlot bd = PROTECT); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1219 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1220 | // Tail call of a runtime routine (jump). |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1221 | // Like JumpToExternalReference, but also takes care of passing the number |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1222 | // of parameters. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1223 | void TailCallExternalReference(const ExternalReference& ext, |
| 1224 | int num_arguments, |
| 1225 | int result_size); |
| 1226 | |
| 1227 | // Convenience function: tail call a runtime routine (jump). |
| 1228 | void TailCallRuntime(Runtime::FunctionId fid, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1229 | int num_arguments, |
| 1230 | int result_size); |
| 1231 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1232 | int CalculateStackPassedWords(int num_reg_arguments, |
| 1233 | int num_double_arguments); |
| 1234 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1235 | // Before calling a C-function from generated code, align arguments on stack |
| 1236 | // and add space for the four mips argument slots. |
| 1237 | // After aligning the frame, non-register arguments must be stored on the |
| 1238 | // stack, after the argument-slots using helper: CFunctionArgumentOperand(). |
| 1239 | // The argument count assumes all arguments are word sized. |
| 1240 | // Some compilers/platforms require the stack to be aligned when calling |
| 1241 | // C++ code. |
| 1242 | // Needs a scratch register to do some arithmetic. This register will be |
| 1243 | // trashed. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1244 | void PrepareCallCFunction(int num_reg_arguments, |
| 1245 | int num_double_registers, |
| 1246 | Register scratch); |
| 1247 | void PrepareCallCFunction(int num_reg_arguments, |
| 1248 | Register scratch); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1249 | |
| 1250 | // Arguments 1-4 are placed in registers a0 thru a3 respectively. |
| 1251 | // Arguments 5..n are stored to stack using following: |
| 1252 | // sw(t0, CFunctionArgumentOperand(5)); |
| 1253 | |
| 1254 | // Calls a C function and cleans up the space for arguments allocated |
| 1255 | // by PrepareCallCFunction. The called function is not allowed to trigger a |
| 1256 | // garbage collection, since that might move the code and invalidate the |
| 1257 | // return address (unless this is somehow accounted for by the called |
| 1258 | // function). |
| 1259 | void CallCFunction(ExternalReference function, int num_arguments); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1260 | void CallCFunction(Register function, int num_arguments); |
| 1261 | void CallCFunction(ExternalReference function, |
| 1262 | int num_reg_arguments, |
| 1263 | int num_double_arguments); |
| 1264 | void CallCFunction(Register function, |
| 1265 | int num_reg_arguments, |
| 1266 | int num_double_arguments); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1267 | void MovFromFloatResult(DoubleRegister dst); |
| 1268 | void MovFromFloatParameter(DoubleRegister dst); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1269 | |
| 1270 | // There are two ways of passing double arguments on MIPS, depending on |
| 1271 | // whether soft or hard floating point ABI is used. These functions |
| 1272 | // abstract parameter passing for the three different ways we call |
| 1273 | // C functions from generated code. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1274 | void MovToFloatParameter(DoubleRegister src); |
| 1275 | void MovToFloatParameters(DoubleRegister src1, DoubleRegister src2); |
| 1276 | void MovToFloatResult(DoubleRegister src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1277 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1278 | // Calls an API function. Allocates HandleScope, extracts returned value |
| 1279 | // from handle and propagates exceptions. Restores context. stack_space |
| 1280 | // - space to be unwound on exit (includes the call JS arguments space and |
| 1281 | // the additional space allocated for the fast call). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1282 | void CallApiFunctionAndReturn(Register function_address, |
| 1283 | ExternalReference thunk_ref, |
| 1284 | int stack_space, |
| 1285 | MemOperand return_value_operand, |
| 1286 | MemOperand* context_restore_operand); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1287 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1288 | // Jump to the builtin routine. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1289 | void JumpToExternalReference(const ExternalReference& builtin, |
| 1290 | BranchDelaySlot bd = PROTECT); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1291 | |
| 1292 | // Invoke specified builtin JavaScript function. Adds an entry to |
| 1293 | // the unresolved list if the name does not resolve. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1294 | void InvokeBuiltin(Builtins::JavaScript id, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1295 | InvokeFlag flag, |
| 1296 | const CallWrapper& call_wrapper = NullCallWrapper()); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1297 | |
| 1298 | // Store the code object for the given builtin in the target register and |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1299 | // setup the function in a1. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1300 | void GetBuiltinEntry(Register target, Builtins::JavaScript id); |
| 1301 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1302 | // Store the function for the given builtin in the target register. |
| 1303 | void GetBuiltinFunction(Register target, Builtins::JavaScript id); |
| 1304 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1305 | struct Unresolved { |
| 1306 | int pc; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1307 | uint32_t flags; // See Bootstrapper::FixupFlags decoders/encoders. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1308 | const char* name; |
| 1309 | }; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1310 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1311 | Handle<Object> CodeObject() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1312 | DCHECK(!code_object_.is_null()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1313 | return code_object_; |
| 1314 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1315 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1316 | // Emit code for a truncating division by a constant. The dividend register is |
| 1317 | // unchanged and at gets clobbered. Dividend and result must be different. |
| 1318 | void TruncatingDiv(Register result, Register dividend, int32_t divisor); |
| 1319 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1320 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1321 | // StatsCounter support. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1322 | |
| 1323 | void SetCounter(StatsCounter* counter, int value, |
| 1324 | Register scratch1, Register scratch2); |
| 1325 | void IncrementCounter(StatsCounter* counter, int value, |
| 1326 | Register scratch1, Register scratch2); |
| 1327 | void DecrementCounter(StatsCounter* counter, int value, |
| 1328 | Register scratch1, Register scratch2); |
| 1329 | |
| 1330 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1331 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1332 | // Debugging. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1333 | |
| 1334 | // Calls Abort(msg) if the condition cc is not satisfied. |
| 1335 | // Use --debug_code to enable. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1336 | void Assert(Condition cc, BailoutReason reason, Register rs, Operand rt); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1337 | void AssertFastElements(Register elements); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1338 | |
| 1339 | // Like Assert(), but always enabled. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1340 | void Check(Condition cc, BailoutReason reason, Register rs, Operand rt); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1341 | |
| 1342 | // Print a message to stdout and abort execution. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1343 | void Abort(BailoutReason msg); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1344 | |
| 1345 | // Verify restrictions about code generated in stubs. |
| 1346 | void set_generating_stub(bool value) { generating_stub_ = value; } |
| 1347 | bool generating_stub() { return generating_stub_; } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1348 | void set_has_frame(bool value) { has_frame_ = value; } |
| 1349 | bool has_frame() { return has_frame_; } |
| 1350 | inline bool AllowThisStubCall(CodeStub* stub); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1351 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1352 | // --------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1353 | // Number utilities. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1354 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1355 | // Check whether the value of reg is a power of two and not zero. If not |
| 1356 | // control continues at the label not_power_of_two. If reg is a power of two |
| 1357 | // the register scratch contains the value of (reg - 1) when control falls |
| 1358 | // through. |
| 1359 | void JumpIfNotPowerOfTwoOrZero(Register reg, |
| 1360 | Register scratch, |
| 1361 | Label* not_power_of_two_or_zero); |
| 1362 | |
| 1363 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1364 | // Smi utilities. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1365 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1366 | void SmiTag(Register reg) { |
| 1367 | Addu(reg, reg, reg); |
| 1368 | } |
| 1369 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1370 | // Test for overflow < 0: use BranchOnOverflow() or BranchOnNoOverflow(). |
| 1371 | void SmiTagCheckOverflow(Register reg, Register overflow); |
| 1372 | void SmiTagCheckOverflow(Register dst, Register src, Register overflow); |
| 1373 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1374 | void SmiTag(Register dst, Register src) { |
| 1375 | Addu(dst, src, src); |
| 1376 | } |
| 1377 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1378 | // Try to convert int32 to smi. If the value is to large, preserve |
| 1379 | // the original value and jump to not_a_smi. Destroys scratch and |
| 1380 | // sets flags. |
| 1381 | void TrySmiTag(Register reg, Register scratch, Label* not_a_smi) { |
| 1382 | TrySmiTag(reg, reg, scratch, not_a_smi); |
| 1383 | } |
| 1384 | void TrySmiTag(Register dst, |
| 1385 | Register src, |
| 1386 | Register scratch, |
| 1387 | Label* not_a_smi) { |
| 1388 | SmiTagCheckOverflow(at, src, scratch); |
| 1389 | BranchOnOverflow(not_a_smi, scratch); |
| 1390 | mov(dst, at); |
| 1391 | } |
| 1392 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1393 | void SmiUntag(Register reg) { |
| 1394 | sra(reg, reg, kSmiTagSize); |
| 1395 | } |
| 1396 | |
| 1397 | void SmiUntag(Register dst, Register src) { |
| 1398 | sra(dst, src, kSmiTagSize); |
| 1399 | } |
| 1400 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1401 | // Test if the register contains a smi. |
| 1402 | inline void SmiTst(Register value, Register scratch) { |
| 1403 | And(scratch, value, Operand(kSmiTagMask)); |
| 1404 | } |
| 1405 | inline void NonNegativeSmiTst(Register value, Register scratch) { |
| 1406 | And(scratch, value, Operand(kSmiTagMask | kSmiSignMask)); |
| 1407 | } |
| 1408 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1409 | // Untag the source value into destination and jump if source is a smi. |
| 1410 | // Souce and destination can be the same register. |
| 1411 | void UntagAndJumpIfSmi(Register dst, Register src, Label* smi_case); |
| 1412 | |
| 1413 | // Untag the source value into destination and jump if source is not a smi. |
| 1414 | // Souce and destination can be the same register. |
| 1415 | void UntagAndJumpIfNotSmi(Register dst, Register src, Label* non_smi_case); |
| 1416 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1417 | // Jump the register contains a smi. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1418 | void JumpIfSmi(Register value, |
| 1419 | Label* smi_label, |
| 1420 | Register scratch = at, |
| 1421 | BranchDelaySlot bd = PROTECT); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1422 | |
| 1423 | // Jump if the register contains a non-smi. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1424 | void JumpIfNotSmi(Register value, |
| 1425 | Label* not_smi_label, |
| 1426 | Register scratch = at, |
| 1427 | BranchDelaySlot bd = PROTECT); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1428 | |
| 1429 | // Jump if either of the registers contain a non-smi. |
| 1430 | void JumpIfNotBothSmi(Register reg1, Register reg2, Label* on_not_both_smi); |
| 1431 | // Jump if either of the registers contain a smi. |
| 1432 | void JumpIfEitherSmi(Register reg1, Register reg2, Label* on_either_smi); |
| 1433 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1434 | // Abort execution if argument is a smi, enabled via --debug-code. |
| 1435 | void AssertNotSmi(Register object); |
| 1436 | void AssertSmi(Register object); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1437 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1438 | // Abort execution if argument is not a string, enabled via --debug-code. |
| 1439 | void AssertString(Register object); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1440 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1441 | // Abort execution if argument is not a name, enabled via --debug-code. |
| 1442 | void AssertName(Register object); |
| 1443 | |
| 1444 | // Abort execution if argument is not undefined or an AllocationSite, enabled |
| 1445 | // via --debug-code. |
| 1446 | void AssertUndefinedOrAllocationSite(Register object, Register scratch); |
| 1447 | |
| 1448 | // Abort execution if reg is not the root value with the given index, |
| 1449 | // enabled via --debug-code. |
| 1450 | void AssertIsRoot(Register reg, Heap::RootListIndex index); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1451 | |
| 1452 | // --------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1453 | // HeapNumber utilities. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1454 | |
| 1455 | void JumpIfNotHeapNumber(Register object, |
| 1456 | Register heap_number_map, |
| 1457 | Register scratch, |
| 1458 | Label* on_not_heap_number); |
| 1459 | |
| 1460 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1461 | // String utilities. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1462 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1463 | // Generate code to do a lookup in the number string cache. If the number in |
| 1464 | // the register object is found in the cache the generated code falls through |
| 1465 | // with the result in the result register. The object and the result register |
| 1466 | // can be the same. If the number is not found in the cache the code jumps to |
| 1467 | // the label not_found with only the content of register object unchanged. |
| 1468 | void LookupNumberStringCache(Register object, |
| 1469 | Register result, |
| 1470 | Register scratch1, |
| 1471 | Register scratch2, |
| 1472 | Register scratch3, |
| 1473 | Label* not_found); |
| 1474 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1475 | // Checks if both instance types are sequential ASCII strings and jumps to |
| 1476 | // label if either is not. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1477 | void JumpIfBothInstanceTypesAreNotSequentialOneByte( |
| 1478 | Register first_object_instance_type, Register second_object_instance_type, |
| 1479 | Register scratch1, Register scratch2, Label* failure); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1480 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1481 | // Check if instance type is sequential one-byte string and jump to label if |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1482 | // it is not. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1483 | void JumpIfInstanceTypeIsNotSequentialOneByte(Register type, Register scratch, |
| 1484 | Label* failure); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1485 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1486 | void JumpIfNotUniqueNameInstanceType(Register reg, Label* not_unique_name); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1487 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1488 | void EmitSeqStringSetCharCheck(Register string, |
| 1489 | Register index, |
| 1490 | Register value, |
| 1491 | Register scratch, |
| 1492 | uint32_t encoding_mask); |
| 1493 | |
| 1494 | // Checks if both objects are sequential one-byte strings and jumps to label |
| 1495 | // if either is not. Assumes that neither object is a smi. |
| 1496 | void JumpIfNonSmisNotBothSequentialOneByteStrings(Register first, |
| 1497 | Register second, |
| 1498 | Register scratch1, |
| 1499 | Register scratch2, |
| 1500 | Label* failure); |
| 1501 | |
| 1502 | // Checks if both objects are sequential one-byte strings and jumps to label |
| 1503 | // if either is not. |
| 1504 | void JumpIfNotBothSequentialOneByteStrings(Register first, Register second, |
| 1505 | Register scratch1, |
| 1506 | Register scratch2, |
| 1507 | Label* not_flat_one_byte_strings); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1508 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1509 | void ClampUint8(Register output_reg, Register input_reg); |
| 1510 | |
| 1511 | void ClampDoubleToUint8(Register result_reg, |
| 1512 | DoubleRegister input_reg, |
| 1513 | DoubleRegister temp_double_reg); |
| 1514 | |
| 1515 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1516 | void LoadInstanceDescriptors(Register map, Register descriptors); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1517 | void EnumLength(Register dst, Register map); |
| 1518 | void NumberOfOwnDescriptors(Register dst, Register map); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1519 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1520 | template<typename Field> |
| 1521 | void DecodeField(Register dst, Register src) { |
| 1522 | Ext(dst, src, Field::kShift, Field::kSize); |
| 1523 | } |
| 1524 | |
| 1525 | template<typename Field> |
| 1526 | void DecodeField(Register reg) { |
| 1527 | DecodeField<Field>(reg, reg); |
| 1528 | } |
| 1529 | |
| 1530 | template<typename Field> |
| 1531 | void DecodeFieldToSmi(Register dst, Register src) { |
| 1532 | static const int shift = Field::kShift; |
| 1533 | static const int mask = Field::kMask >> shift << kSmiTagSize; |
| 1534 | STATIC_ASSERT((mask & (0x80000000u >> (kSmiTagSize - 1))) == 0); |
| 1535 | STATIC_ASSERT(kSmiTag == 0); |
| 1536 | if (shift < kSmiTagSize) { |
| 1537 | sll(dst, src, kSmiTagSize - shift); |
| 1538 | And(dst, dst, Operand(mask)); |
| 1539 | } else if (shift > kSmiTagSize) { |
| 1540 | srl(dst, src, shift - kSmiTagSize); |
| 1541 | And(dst, dst, Operand(mask)); |
| 1542 | } else { |
| 1543 | And(dst, src, Operand(mask)); |
| 1544 | } |
| 1545 | } |
| 1546 | |
| 1547 | template<typename Field> |
| 1548 | void DecodeFieldToSmi(Register reg) { |
| 1549 | DecodeField<Field>(reg, reg); |
| 1550 | } |
| 1551 | |
| 1552 | // Generates function and stub prologue code. |
| 1553 | void StubPrologue(); |
| 1554 | void Prologue(bool code_pre_aging); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1555 | |
| 1556 | // Activation support. |
| 1557 | void EnterFrame(StackFrame::Type type); |
| 1558 | void LeaveFrame(StackFrame::Type type); |
| 1559 | |
| 1560 | // Patch the relocated value (lui/ori pair). |
| 1561 | void PatchRelocatedValue(Register li_location, |
| 1562 | Register scratch, |
| 1563 | Register new_value); |
| 1564 | // Get the relocatad value (loaded data) from the lui/ori pair. |
| 1565 | void GetRelocatedValue(Register li_location, |
| 1566 | Register value, |
| 1567 | Register scratch); |
| 1568 | |
| 1569 | // Expects object in a0 and returns map with validated enum cache |
| 1570 | // in a0. Assumes that any other register can be used as a scratch. |
| 1571 | void CheckEnumCache(Register null_value, Label* call_runtime); |
| 1572 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1573 | // AllocationMemento support. Arrays may have an associated |
| 1574 | // AllocationMemento object that can be checked for in order to pretransition |
| 1575 | // to another type. |
| 1576 | // On entry, receiver_reg should point to the array object. |
| 1577 | // scratch_reg gets clobbered. |
| 1578 | // If allocation info is present, jump to allocation_memento_present. |
| 1579 | void TestJSArrayForAllocationMemento( |
| 1580 | Register receiver_reg, |
| 1581 | Register scratch_reg, |
| 1582 | Label* no_memento_found, |
| 1583 | Condition cond = al, |
| 1584 | Label* allocation_memento_present = NULL); |
| 1585 | |
| 1586 | void JumpIfJSArrayHasAllocationMemento(Register receiver_reg, |
| 1587 | Register scratch_reg, |
| 1588 | Label* memento_found) { |
| 1589 | Label no_memento_found; |
| 1590 | TestJSArrayForAllocationMemento(receiver_reg, scratch_reg, |
| 1591 | &no_memento_found, eq, memento_found); |
| 1592 | bind(&no_memento_found); |
| 1593 | } |
| 1594 | |
| 1595 | // Jumps to found label if a prototype map has dictionary elements. |
| 1596 | void JumpIfDictionaryInPrototypeChain(Register object, Register scratch0, |
| 1597 | Register scratch1, Label* found); |
| 1598 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1599 | private: |
| 1600 | void CallCFunctionHelper(Register function, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1601 | int num_reg_arguments, |
| 1602 | int num_double_arguments); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1603 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1604 | void BranchAndLinkShort(int16_t offset, BranchDelaySlot bdslot = PROTECT); |
| 1605 | void BranchAndLinkShort(int16_t offset, Condition cond, Register rs, |
| 1606 | const Operand& rt, |
| 1607 | BranchDelaySlot bdslot = PROTECT); |
| 1608 | void BranchAndLinkShort(Label* L, BranchDelaySlot bdslot = PROTECT); |
| 1609 | void BranchAndLinkShort(Label* L, Condition cond, Register rs, |
| 1610 | const Operand& rt, |
| 1611 | BranchDelaySlot bdslot = PROTECT); |
| 1612 | void J(Label* L, BranchDelaySlot bdslot); |
| 1613 | void Jr(Label* L, BranchDelaySlot bdslot); |
| 1614 | void Jalr(Label* L, BranchDelaySlot bdslot); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1615 | |
| 1616 | // Helper functions for generating invokes. |
| 1617 | void InvokePrologue(const ParameterCount& expected, |
| 1618 | const ParameterCount& actual, |
| 1619 | Handle<Code> code_constant, |
| 1620 | Register code_reg, |
| 1621 | Label* done, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1622 | bool* definitely_mismatches, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1623 | InvokeFlag flag, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1624 | const CallWrapper& call_wrapper); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1625 | |
| 1626 | // Get the code for the given builtin. Returns if able to resolve |
| 1627 | // the function in the 'resolved' flag. |
| 1628 | Handle<Code> ResolveBuiltin(Builtins::JavaScript id, bool* resolved); |
| 1629 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1630 | void InitializeNewString(Register string, |
| 1631 | Register length, |
| 1632 | Heap::RootListIndex map_index, |
| 1633 | Register scratch1, |
| 1634 | Register scratch2); |
| 1635 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1636 | // Helper for implementing JumpIfNotInNewSpace and JumpIfInNewSpace. |
| 1637 | void InNewSpace(Register object, |
| 1638 | Register scratch, |
| 1639 | Condition cond, // eq for new space, ne otherwise. |
| 1640 | Label* branch); |
| 1641 | |
| 1642 | // Helper for finding the mark bits for an address. Afterwards, the |
| 1643 | // bitmap register points at the word with the mark bits and the mask |
| 1644 | // the position of the first bit. Leaves addr_reg unchanged. |
| 1645 | inline void GetMarkBits(Register addr_reg, |
| 1646 | Register bitmap_reg, |
| 1647 | Register mask_reg); |
| 1648 | |
| 1649 | // Helper for throwing exceptions. Compute a handler address and jump to |
| 1650 | // it. See the implementation for register usage. |
| 1651 | void JumpToHandlerEntry(); |
| 1652 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1653 | // Compute memory operands for safepoint stack slots. |
| 1654 | static int SafepointRegisterStackIndex(int reg_code); |
| 1655 | MemOperand SafepointRegisterSlot(Register reg); |
| 1656 | MemOperand SafepointRegistersAndDoublesSlot(Register reg); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1657 | |
| 1658 | bool generating_stub_; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1659 | bool has_frame_; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1660 | // This handle will be patched with the code object on installation. |
| 1661 | Handle<Object> code_object_; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1662 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1663 | // Needs access to SafepointRegisterStackIndex for compiled frame |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1664 | // traversal. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1665 | friend class StandardFrame; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1666 | }; |
| 1667 | |
| 1668 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1669 | // The code patcher is used to patch (typically) small parts of code e.g. for |
| 1670 | // debugging and other types of instrumentation. When using the code patcher |
| 1671 | // the exact number of bytes specified must be emitted. It is not legal to emit |
| 1672 | // relocation information. If any of these constraints are violated it causes |
| 1673 | // an assertion to fail. |
| 1674 | class CodePatcher { |
| 1675 | public: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1676 | enum FlushICache { |
| 1677 | FLUSH, |
| 1678 | DONT_FLUSH |
| 1679 | }; |
| 1680 | |
| 1681 | CodePatcher(byte* address, |
| 1682 | int instructions, |
| 1683 | FlushICache flush_cache = FLUSH); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1684 | virtual ~CodePatcher(); |
| 1685 | |
| 1686 | // Macro assembler to emit code. |
| 1687 | MacroAssembler* masm() { return &masm_; } |
| 1688 | |
| 1689 | // Emit an instruction directly. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1690 | void Emit(Instr instr); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1691 | |
| 1692 | // Emit an address directly. |
| 1693 | void Emit(Address addr); |
| 1694 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1695 | // Change the condition part of an instruction leaving the rest of the current |
| 1696 | // instruction unchanged. |
| 1697 | void ChangeBranchCondition(Condition cond); |
| 1698 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1699 | private: |
| 1700 | byte* address_; // The address of the code being patched. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1701 | int size_; // Number of bytes of the expected patch size. |
| 1702 | MacroAssembler masm_; // Macro assembler used to generate the code. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1703 | FlushICache flush_cache_; // Whether to flush the I cache after patching. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1704 | }; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1705 | |
| 1706 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1707 | |
| 1708 | #ifdef GENERATED_CODE_COVERAGE |
| 1709 | #define CODE_COVERAGE_STRINGIFY(x) #x |
| 1710 | #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x) |
| 1711 | #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__) |
| 1712 | #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm-> |
| 1713 | #else |
| 1714 | #define ACCESS_MASM(masm) masm-> |
| 1715 | #endif |
| 1716 | |
| 1717 | } } // namespace v8::internal |
| 1718 | |
| 1719 | #endif // V8_MIPS_MACRO_ASSEMBLER_MIPS_H_ |