Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_MIPS_MACRO_ASSEMBLER_MIPS_H_ |
| 29 | #define V8_MIPS_MACRO_ASSEMBLER_MIPS_H_ |
| 30 | |
| 31 | #include "assembler.h" |
| 32 | #include "mips/assembler-mips.h" |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 33 | #include "v8globals.h" |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 34 | |
| 35 | namespace v8 { |
| 36 | namespace internal { |
| 37 | |
| 38 | // Forward declaration. |
| 39 | class JumpTarget; |
| 40 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 41 | // Reserved Register Usage Summary. |
| 42 | // |
| 43 | // Registers t8, t9, and at are reserved for use by the MacroAssembler. |
| 44 | // |
| 45 | // The programmer should know that the MacroAssembler may clobber these three, |
| 46 | // but won't touch other registers except in special cases. |
| 47 | // |
| 48 | // Per the MIPS ABI, register t9 must be used for indirect function call |
| 49 | // via 'jalr t9' or 'jr t9' instructions. This is relied upon by gcc when |
| 50 | // trying to update gp register for position-independent-code. Whenever |
| 51 | // MIPS generated code calls C code, it must be via t9 register. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 52 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 53 | |
| 54 | // Register aliases. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 55 | // cp is assumed to be a callee saved register. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 56 | const Register lithiumScratchReg = s3; // Scratch register. |
| 57 | const Register lithiumScratchReg2 = s4; // Scratch register. |
| 58 | const Register condReg = s5; // Simulated (partial) condition code for mips. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 59 | const Register roots = s6; // Roots array pointer. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 60 | const Register cp = s7; // JavaScript context pointer. |
| 61 | const Register fp = s8_fp; // Alias for fp. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 62 | const DoubleRegister lithiumScratchDouble = f30; // Double scratch register. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 63 | |
| 64 | // Flags used for the AllocateInNewSpace functions. |
| 65 | enum AllocationFlags { |
| 66 | // No special flags. |
| 67 | NO_ALLOCATION_FLAGS = 0, |
| 68 | // Return the pointer to the allocated already tagged as a heap object. |
| 69 | TAG_OBJECT = 1 << 0, |
| 70 | // The content of the result register already contains the allocation top in |
| 71 | // new space. |
| 72 | RESULT_CONTAINS_TOP = 1 << 1, |
| 73 | // Specify that the requested size of the space to allocate is specified in |
| 74 | // words instead of bytes. |
| 75 | SIZE_IN_WORDS = 1 << 2 |
| 76 | }; |
| 77 | |
| 78 | // Flags used for the ObjectToDoubleFPURegister function. |
| 79 | enum ObjectToDoubleFlags { |
| 80 | // No special flags. |
| 81 | NO_OBJECT_TO_DOUBLE_FLAGS = 0, |
| 82 | // Object is known to be a non smi. |
| 83 | OBJECT_NOT_SMI = 1 << 0, |
| 84 | // Don't load NaNs or infinities, branch to the non number case instead. |
| 85 | AVOID_NANS_AND_INFINITIES = 1 << 1 |
| 86 | }; |
| 87 | |
| 88 | // Allow programmer to use Branch Delay Slot of Branches, Jumps, Calls. |
| 89 | enum BranchDelaySlot { |
| 90 | USE_DELAY_SLOT, |
| 91 | PROTECT |
| 92 | }; |
| 93 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 94 | |
| 95 | enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET }; |
| 96 | enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK }; |
| 97 | enum RAStatus { kRAHasNotBeenSaved, kRAHasBeenSaved }; |
| 98 | |
| 99 | bool AreAliased(Register r1, Register r2, Register r3, Register r4); |
| 100 | |
| 101 | |
| 102 | // ----------------------------------------------------------------------------- |
| 103 | // Static helper functions. |
| 104 | |
| 105 | inline MemOperand ContextOperand(Register context, int index) { |
| 106 | return MemOperand(context, Context::SlotOffset(index)); |
| 107 | } |
| 108 | |
| 109 | |
| 110 | inline MemOperand GlobalObjectOperand() { |
| 111 | return ContextOperand(cp, Context::GLOBAL_INDEX); |
| 112 | } |
| 113 | |
| 114 | |
| 115 | // Generate a MemOperand for loading a field from an object. |
| 116 | inline MemOperand FieldMemOperand(Register object, int offset) { |
| 117 | return MemOperand(object, offset - kHeapObjectTag); |
| 118 | } |
| 119 | |
| 120 | |
| 121 | // Generate a MemOperand for storing arguments 5..N on the stack |
| 122 | // when calling CallCFunction(). |
| 123 | inline MemOperand CFunctionArgumentOperand(int index) { |
| 124 | ASSERT(index > kCArgSlotCount); |
| 125 | // Argument 5 takes the slot just past the four Arg-slots. |
| 126 | int offset = (index - 5) * kPointerSize + kCArgsSlotsSize; |
| 127 | return MemOperand(sp, offset); |
| 128 | } |
| 129 | |
| 130 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 131 | // MacroAssembler implements a collection of frequently used macros. |
| 132 | class MacroAssembler: public Assembler { |
| 133 | public: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 134 | // The isolate parameter can be NULL if the macro assembler should |
| 135 | // not use isolate-dependent functionality. In this case, it's the |
| 136 | // responsibility of the caller to never invoke such function on the |
| 137 | // macro assembler. |
| 138 | MacroAssembler(Isolate* isolate, void* buffer, int size); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 139 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 140 | // Arguments macros. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 141 | #define COND_TYPED_ARGS Condition cond, Register r1, const Operand& r2 |
| 142 | #define COND_ARGS cond, r1, r2 |
| 143 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 144 | // Cases when relocation is not needed. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 145 | #define DECLARE_NORELOC_PROTOTYPE(Name, target_type) \ |
| 146 | void Name(target_type target, BranchDelaySlot bd = PROTECT); \ |
| 147 | inline void Name(BranchDelaySlot bd, target_type target) { \ |
| 148 | Name(target, bd); \ |
| 149 | } \ |
| 150 | void Name(target_type target, \ |
| 151 | COND_TYPED_ARGS, \ |
| 152 | BranchDelaySlot bd = PROTECT); \ |
| 153 | inline void Name(BranchDelaySlot bd, \ |
| 154 | target_type target, \ |
| 155 | COND_TYPED_ARGS) { \ |
| 156 | Name(target, COND_ARGS, bd); \ |
| 157 | } |
| 158 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 159 | #define DECLARE_BRANCH_PROTOTYPES(Name) \ |
| 160 | DECLARE_NORELOC_PROTOTYPE(Name, Label*) \ |
| 161 | DECLARE_NORELOC_PROTOTYPE(Name, int16_t) |
| 162 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 163 | DECLARE_BRANCH_PROTOTYPES(Branch) |
| 164 | DECLARE_BRANCH_PROTOTYPES(BranchAndLink) |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 165 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 166 | #undef DECLARE_BRANCH_PROTOTYPES |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 167 | #undef COND_TYPED_ARGS |
| 168 | #undef COND_ARGS |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 169 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 170 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 171 | // Jump, Call, and Ret pseudo instructions implementing inter-working. |
| 172 | #define COND_ARGS Condition cond = al, Register rs = zero_reg, \ |
| 173 | const Operand& rt = Operand(zero_reg), BranchDelaySlot bd = PROTECT |
| 174 | |
| 175 | void Jump(Register target, COND_ARGS); |
| 176 | void Jump(intptr_t target, RelocInfo::Mode rmode, COND_ARGS); |
| 177 | void Jump(Address target, RelocInfo::Mode rmode, COND_ARGS); |
| 178 | void Jump(Handle<Code> code, RelocInfo::Mode rmode, COND_ARGS); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 179 | static int CallSize(Register target, COND_ARGS); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 180 | void Call(Register target, COND_ARGS); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 181 | static int CallSize(Address target, RelocInfo::Mode rmode, COND_ARGS); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 182 | void Call(Address target, RelocInfo::Mode rmode, COND_ARGS); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 183 | static int CallSize(Handle<Code> code, |
| 184 | RelocInfo::Mode rmode = RelocInfo::CODE_TARGET, |
| 185 | unsigned ast_id = kNoASTId, |
| 186 | COND_ARGS); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 187 | void Call(Handle<Code> code, |
| 188 | RelocInfo::Mode rmode = RelocInfo::CODE_TARGET, |
| 189 | unsigned ast_id = kNoASTId, |
| 190 | COND_ARGS); |
| 191 | void Ret(COND_ARGS); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 192 | inline void Ret(BranchDelaySlot bd, Condition cond = al, |
| 193 | Register rs = zero_reg, const Operand& rt = Operand(zero_reg)) { |
| 194 | Ret(cond, rs, rt, bd); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | #undef COND_ARGS |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 198 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 199 | // Emit code to discard a non-negative number of pointer-sized elements |
| 200 | // from the stack, clobbering only the sp register. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 201 | void Drop(int count, |
| 202 | Condition cond = cc_always, |
| 203 | Register reg = no_reg, |
| 204 | const Operand& op = Operand(no_reg)); |
| 205 | |
| 206 | void DropAndRet(int drop = 0, |
| 207 | Condition cond = cc_always, |
| 208 | Register reg = no_reg, |
| 209 | const Operand& op = Operand(no_reg)); |
| 210 | |
| 211 | // Swap two registers. If the scratch register is omitted then a slightly |
| 212 | // less efficient form using xor instead of mov is emitted. |
| 213 | void Swap(Register reg1, Register reg2, Register scratch = no_reg); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 214 | |
| 215 | void Call(Label* target); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 216 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 217 | inline void Move(Register dst, Register src) { |
| 218 | if (!dst.is(src)) { |
| 219 | mov(dst, src); |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | inline void Move(FPURegister dst, FPURegister src) { |
| 224 | if (!dst.is(src)) { |
| 225 | mov_d(dst, src); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | inline void Move(Register dst_low, Register dst_high, FPURegister src) { |
| 230 | mfc1(dst_low, src); |
| 231 | mfc1(dst_high, FPURegister::from_code(src.code() + 1)); |
| 232 | } |
| 233 | |
| 234 | inline void Move(FPURegister dst, Register src_low, Register src_high) { |
| 235 | mtc1(src_low, dst); |
| 236 | mtc1(src_high, FPURegister::from_code(dst.code() + 1)); |
| 237 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 238 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 239 | void Move(FPURegister dst, double imm); |
| 240 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 241 | // Jump unconditionally to given label. |
| 242 | // We NEED a nop in the branch delay slot, as it used by v8, for example in |
| 243 | // CodeGenerator::ProcessDeferred(). |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 244 | // Currently the branch delay slot is filled by the MacroAssembler. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 245 | // Use rather b(Label) for code generation. |
| 246 | void jmp(Label* L) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 247 | Branch(L); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 248 | } |
| 249 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 250 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 251 | // Load an object from the root table. |
| 252 | void LoadRoot(Register destination, |
| 253 | Heap::RootListIndex index); |
| 254 | void LoadRoot(Register destination, |
| 255 | Heap::RootListIndex index, |
| 256 | Condition cond, Register src1, const Operand& src2); |
| 257 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 258 | // Store an object to the root table. |
| 259 | void StoreRoot(Register source, |
| 260 | Heap::RootListIndex index); |
| 261 | void StoreRoot(Register source, |
| 262 | Heap::RootListIndex index, |
| 263 | Condition cond, Register src1, const Operand& src2); |
| 264 | |
| 265 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 266 | // --------------------------------------------------------------------------- |
| 267 | // GC Support |
| 268 | |
| 269 | void IncrementalMarkingRecordWriteHelper(Register object, |
| 270 | Register value, |
| 271 | Register address); |
| 272 | |
| 273 | enum RememberedSetFinalAction { |
| 274 | kReturnAtEnd, |
| 275 | kFallThroughAtEnd |
| 276 | }; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 277 | |
| 278 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 279 | // Record in the remembered set the fact that we have a pointer to new space |
| 280 | // at the address pointed to by the addr register. Only works if addr is not |
| 281 | // in new space. |
| 282 | void RememberedSetHelper(Register object, // Used for debug code. |
| 283 | Register addr, |
| 284 | Register scratch, |
| 285 | SaveFPRegsMode save_fp, |
| 286 | RememberedSetFinalAction and_then); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 287 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 288 | void CheckPageFlag(Register object, |
| 289 | Register scratch, |
| 290 | int mask, |
| 291 | Condition cc, |
| 292 | Label* condition_met); |
| 293 | |
| 294 | // Check if object is in new space. Jumps if the object is not in new space. |
| 295 | // The register scratch can be object itself, but it will be clobbered. |
| 296 | void JumpIfNotInNewSpace(Register object, |
| 297 | Register scratch, |
| 298 | Label* branch) { |
| 299 | InNewSpace(object, scratch, ne, branch); |
| 300 | } |
| 301 | |
| 302 | // Check if object is in new space. Jumps if the object is in new space. |
| 303 | // The register scratch can be object itself, but scratch will be clobbered. |
| 304 | void JumpIfInNewSpace(Register object, |
| 305 | Register scratch, |
| 306 | Label* branch) { |
| 307 | InNewSpace(object, scratch, eq, branch); |
| 308 | } |
| 309 | |
| 310 | // Check if an object has a given incremental marking color. |
| 311 | void HasColor(Register object, |
| 312 | Register scratch0, |
| 313 | Register scratch1, |
| 314 | Label* has_color, |
| 315 | int first_bit, |
| 316 | int second_bit); |
| 317 | |
| 318 | void JumpIfBlack(Register object, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 319 | Register scratch0, |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 320 | Register scratch1, |
| 321 | Label* on_black); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 322 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 323 | // Checks the color of an object. If the object is already grey or black |
| 324 | // then we just fall through, since it is already live. If it is white and |
| 325 | // we can determine that it doesn't need to be scanned, then we just mark it |
| 326 | // black and fall through. For the rest we jump to the label so the |
| 327 | // incremental marker can fix its assumptions. |
| 328 | void EnsureNotWhite(Register object, |
| 329 | Register scratch1, |
| 330 | Register scratch2, |
| 331 | Register scratch3, |
| 332 | Label* object_is_white_and_not_data); |
| 333 | |
| 334 | // Detects conservatively whether an object is data-only, ie it does need to |
| 335 | // be scanned by the garbage collector. |
| 336 | void JumpIfDataObject(Register value, |
| 337 | Register scratch, |
| 338 | Label* not_data_object); |
| 339 | |
| 340 | // Notify the garbage collector that we wrote a pointer into an object. |
| 341 | // |object| is the object being stored into, |value| is the object being |
| 342 | // stored. value and scratch registers are clobbered by the operation. |
| 343 | // The offset is the offset from the start of the object, not the offset from |
| 344 | // the tagged HeapObject pointer. For use with FieldOperand(reg, off). |
| 345 | void RecordWriteField( |
| 346 | Register object, |
| 347 | int offset, |
| 348 | Register value, |
| 349 | Register scratch, |
| 350 | RAStatus ra_status, |
| 351 | SaveFPRegsMode save_fp, |
| 352 | RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
| 353 | SmiCheck smi_check = INLINE_SMI_CHECK); |
| 354 | |
| 355 | // As above, but the offset has the tag presubtracted. For use with |
| 356 | // MemOperand(reg, off). |
| 357 | inline void RecordWriteContextSlot( |
| 358 | Register context, |
| 359 | int offset, |
| 360 | Register value, |
| 361 | Register scratch, |
| 362 | RAStatus ra_status, |
| 363 | SaveFPRegsMode save_fp, |
| 364 | RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
| 365 | SmiCheck smi_check = INLINE_SMI_CHECK) { |
| 366 | RecordWriteField(context, |
| 367 | offset + kHeapObjectTag, |
| 368 | value, |
| 369 | scratch, |
| 370 | ra_status, |
| 371 | save_fp, |
| 372 | remembered_set_action, |
| 373 | smi_check); |
| 374 | } |
| 375 | |
| 376 | // For a given |object| notify the garbage collector that the slot |address| |
| 377 | // has been written. |value| is the object being stored. The value and |
| 378 | // address registers are clobbered by the operation. |
| 379 | void RecordWrite( |
| 380 | Register object, |
| 381 | Register address, |
| 382 | Register value, |
| 383 | RAStatus ra_status, |
| 384 | SaveFPRegsMode save_fp, |
| 385 | RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
| 386 | SmiCheck smi_check = INLINE_SMI_CHECK); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 387 | |
| 388 | |
| 389 | // --------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 390 | // Inline caching support. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 391 | |
| 392 | // Generate code for checking access rights - used for security checks |
| 393 | // on access to global objects across environments. The holder register |
| 394 | // is left untouched, whereas both scratch registers are clobbered. |
| 395 | void CheckAccessGlobalProxy(Register holder_reg, |
| 396 | Register scratch, |
| 397 | Label* miss); |
| 398 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 399 | |
| 400 | void LoadFromNumberDictionary(Label* miss, |
| 401 | Register elements, |
| 402 | Register key, |
| 403 | Register result, |
| 404 | Register reg0, |
| 405 | Register reg1, |
| 406 | Register reg2); |
| 407 | |
| 408 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 409 | inline void MarkCode(NopMarkerTypes type) { |
| 410 | nop(type); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 411 | } |
| 412 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 413 | // Check if the given instruction is a 'type' marker. |
| 414 | // ie. check if it is a sll zero_reg, zero_reg, <type> (referenced as |
| 415 | // nop(type)). These instructions are generated to mark special location in |
| 416 | // the code, like some special IC code. |
| 417 | static inline bool IsMarkedCode(Instr instr, int type) { |
| 418 | ASSERT((FIRST_IC_MARKER <= type) && (type < LAST_CODE_MARKER)); |
| 419 | return IsNop(instr, type); |
| 420 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 421 | |
| 422 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 423 | static inline int GetCodeMarker(Instr instr) { |
| 424 | uint32_t opcode = ((instr & kOpcodeMask)); |
| 425 | uint32_t rt = ((instr & kRtFieldMask) >> kRtShift); |
| 426 | uint32_t rs = ((instr & kRsFieldMask) >> kRsShift); |
| 427 | uint32_t sa = ((instr & kSaFieldMask) >> kSaShift); |
| 428 | |
| 429 | // Return <n> if we have a sll zero_reg, zero_reg, n |
| 430 | // else return -1. |
| 431 | bool sllzz = (opcode == SLL && |
| 432 | rt == static_cast<uint32_t>(ToNumber(zero_reg)) && |
| 433 | rs == static_cast<uint32_t>(ToNumber(zero_reg))); |
| 434 | int type = |
| 435 | (sllzz && FIRST_IC_MARKER <= sa && sa < LAST_CODE_MARKER) ? sa : -1; |
| 436 | ASSERT((type == -1) || |
| 437 | ((FIRST_IC_MARKER <= type) && (type < LAST_CODE_MARKER))); |
| 438 | return type; |
| 439 | } |
| 440 | |
| 441 | |
| 442 | |
| 443 | // --------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 444 | // Allocation support. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 445 | |
| 446 | // Allocate an object in new space. The object_size is specified |
| 447 | // either in bytes or in words if the allocation flag SIZE_IN_WORDS |
| 448 | // is passed. If the new space is exhausted control continues at the |
| 449 | // gc_required label. The allocated object is returned in result. If |
| 450 | // the flag tag_allocated_object is true the result is tagged as as |
| 451 | // a heap object. All registers are clobbered also when control |
| 452 | // continues at the gc_required label. |
| 453 | void AllocateInNewSpace(int object_size, |
| 454 | Register result, |
| 455 | Register scratch1, |
| 456 | Register scratch2, |
| 457 | Label* gc_required, |
| 458 | AllocationFlags flags); |
| 459 | void AllocateInNewSpace(Register object_size, |
| 460 | Register result, |
| 461 | Register scratch1, |
| 462 | Register scratch2, |
| 463 | Label* gc_required, |
| 464 | AllocationFlags flags); |
| 465 | |
| 466 | // Undo allocation in new space. The object passed and objects allocated after |
| 467 | // it will no longer be allocated. The caller must make sure that no pointers |
| 468 | // are left to the object(s) no longer allocated as they would be invalid when |
| 469 | // allocation is undone. |
| 470 | void UndoAllocationInNewSpace(Register object, Register scratch); |
| 471 | |
| 472 | |
| 473 | void AllocateTwoByteString(Register result, |
| 474 | Register length, |
| 475 | Register scratch1, |
| 476 | Register scratch2, |
| 477 | Register scratch3, |
| 478 | Label* gc_required); |
| 479 | void AllocateAsciiString(Register result, |
| 480 | Register length, |
| 481 | Register scratch1, |
| 482 | Register scratch2, |
| 483 | Register scratch3, |
| 484 | Label* gc_required); |
| 485 | void AllocateTwoByteConsString(Register result, |
| 486 | Register length, |
| 487 | Register scratch1, |
| 488 | Register scratch2, |
| 489 | Label* gc_required); |
| 490 | void AllocateAsciiConsString(Register result, |
| 491 | Register length, |
| 492 | Register scratch1, |
| 493 | Register scratch2, |
| 494 | Label* gc_required); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 495 | void AllocateTwoByteSlicedString(Register result, |
| 496 | Register length, |
| 497 | Register scratch1, |
| 498 | Register scratch2, |
| 499 | Label* gc_required); |
| 500 | void AllocateAsciiSlicedString(Register result, |
| 501 | Register length, |
| 502 | Register scratch1, |
| 503 | Register scratch2, |
| 504 | Label* gc_required); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 505 | |
| 506 | // Allocates a heap number or jumps to the gc_required label if the young |
| 507 | // space is full and a scavenge is needed. All registers are clobbered also |
| 508 | // when control continues at the gc_required label. |
| 509 | void AllocateHeapNumber(Register result, |
| 510 | Register scratch1, |
| 511 | Register scratch2, |
| 512 | Register heap_number_map, |
| 513 | Label* gc_required); |
| 514 | void AllocateHeapNumberWithValue(Register result, |
| 515 | FPURegister value, |
| 516 | Register scratch1, |
| 517 | Register scratch2, |
| 518 | Label* gc_required); |
| 519 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 520 | // --------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 521 | // Instruction macros. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 522 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 523 | #define DEFINE_INSTRUCTION(instr) \ |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 524 | void instr(Register rd, Register rs, const Operand& rt); \ |
| 525 | void instr(Register rd, Register rs, Register rt) { \ |
| 526 | instr(rd, rs, Operand(rt)); \ |
| 527 | } \ |
| 528 | void instr(Register rs, Register rt, int32_t j) { \ |
| 529 | instr(rs, rt, Operand(j)); \ |
| 530 | } |
| 531 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 532 | #define DEFINE_INSTRUCTION2(instr) \ |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 533 | void instr(Register rs, const Operand& rt); \ |
| 534 | void instr(Register rs, Register rt) { \ |
| 535 | instr(rs, Operand(rt)); \ |
| 536 | } \ |
| 537 | void instr(Register rs, int32_t j) { \ |
| 538 | instr(rs, Operand(j)); \ |
| 539 | } |
| 540 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 541 | DEFINE_INSTRUCTION(Addu); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 542 | DEFINE_INSTRUCTION(Subu); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 543 | DEFINE_INSTRUCTION(Mul); |
| 544 | DEFINE_INSTRUCTION2(Mult); |
| 545 | DEFINE_INSTRUCTION2(Multu); |
| 546 | DEFINE_INSTRUCTION2(Div); |
| 547 | DEFINE_INSTRUCTION2(Divu); |
| 548 | |
| 549 | DEFINE_INSTRUCTION(And); |
| 550 | DEFINE_INSTRUCTION(Or); |
| 551 | DEFINE_INSTRUCTION(Xor); |
| 552 | DEFINE_INSTRUCTION(Nor); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 553 | DEFINE_INSTRUCTION2(Neg); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 554 | |
| 555 | DEFINE_INSTRUCTION(Slt); |
| 556 | DEFINE_INSTRUCTION(Sltu); |
| 557 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 558 | // MIPS32 R2 instruction macro. |
| 559 | DEFINE_INSTRUCTION(Ror); |
| 560 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 561 | #undef DEFINE_INSTRUCTION |
| 562 | #undef DEFINE_INSTRUCTION2 |
| 563 | |
| 564 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 565 | // --------------------------------------------------------------------------- |
| 566 | // Pseudo-instructions. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 567 | |
| 568 | void mov(Register rd, Register rt) { or_(rd, rt, zero_reg); } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 569 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 570 | // Load int32 in the rd register. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 571 | void li(Register rd, Operand j, bool gen2instr = false); |
| 572 | inline void li(Register rd, int32_t j, bool gen2instr = false) { |
| 573 | li(rd, Operand(j), gen2instr); |
| 574 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 575 | inline void li(Register dst, Handle<Object> value, bool gen2instr = false) { |
| 576 | li(dst, Operand(value), gen2instr); |
| 577 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 578 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 579 | // Push multiple registers on the stack. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 580 | // Registers are saved in numerical order, with higher numbered registers |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 581 | // saved in higher memory addresses. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 582 | void MultiPush(RegList regs); |
| 583 | void MultiPushReversed(RegList regs); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 584 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 585 | void MultiPushFPU(RegList regs); |
| 586 | void MultiPushReversedFPU(RegList regs); |
| 587 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 588 | // Lower case push() for compatibility with arch-independent code. |
| 589 | void push(Register src) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 590 | Addu(sp, sp, Operand(-kPointerSize)); |
| 591 | sw(src, MemOperand(sp, 0)); |
| 592 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 593 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 594 | // Push a handle. |
| 595 | void Push(Handle<Object> handle); |
| 596 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 597 | // Push two registers. Pushes leftmost register first (to highest address). |
| 598 | void Push(Register src1, Register src2) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 599 | Subu(sp, sp, Operand(2 * kPointerSize)); |
| 600 | sw(src1, MemOperand(sp, 1 * kPointerSize)); |
| 601 | sw(src2, MemOperand(sp, 0 * kPointerSize)); |
| 602 | } |
| 603 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 604 | // Push three registers. Pushes leftmost register first (to highest address). |
| 605 | void Push(Register src1, Register src2, Register src3) { |
| 606 | Subu(sp, sp, Operand(3 * kPointerSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 607 | sw(src1, MemOperand(sp, 2 * kPointerSize)); |
| 608 | sw(src2, MemOperand(sp, 1 * kPointerSize)); |
| 609 | sw(src3, MemOperand(sp, 0 * kPointerSize)); |
| 610 | } |
| 611 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 612 | // Push four registers. Pushes leftmost register first (to highest address). |
| 613 | void Push(Register src1, Register src2, Register src3, Register src4) { |
| 614 | Subu(sp, sp, Operand(4 * kPointerSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 615 | sw(src1, MemOperand(sp, 3 * kPointerSize)); |
| 616 | sw(src2, MemOperand(sp, 2 * kPointerSize)); |
| 617 | sw(src3, MemOperand(sp, 1 * kPointerSize)); |
| 618 | sw(src4, MemOperand(sp, 0 * kPointerSize)); |
| 619 | } |
| 620 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 621 | void Push(Register src, Condition cond, Register tst1, Register tst2) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 622 | // Since we don't have conditional execution we use a Branch. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 623 | Branch(3, cond, tst1, Operand(tst2)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 624 | Subu(sp, sp, Operand(kPointerSize)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 625 | sw(src, MemOperand(sp, 0)); |
| 626 | } |
| 627 | |
| 628 | // Pops multiple values from the stack and load them in the |
| 629 | // registers specified in regs. Pop order is the opposite as in MultiPush. |
| 630 | void MultiPop(RegList regs); |
| 631 | void MultiPopReversed(RegList regs); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 632 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 633 | void MultiPopFPU(RegList regs); |
| 634 | void MultiPopReversedFPU(RegList regs); |
| 635 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 636 | // Lower case pop() for compatibility with arch-independent code. |
| 637 | void pop(Register dst) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 638 | lw(dst, MemOperand(sp, 0)); |
| 639 | Addu(sp, sp, Operand(kPointerSize)); |
| 640 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 641 | |
| 642 | // Pop two registers. Pops rightmost register first (from lower address). |
| 643 | void Pop(Register src1, Register src2) { |
| 644 | ASSERT(!src1.is(src2)); |
| 645 | lw(src2, MemOperand(sp, 0 * kPointerSize)); |
| 646 | lw(src1, MemOperand(sp, 1 * kPointerSize)); |
| 647 | Addu(sp, sp, 2 * kPointerSize); |
| 648 | } |
| 649 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 650 | // Pop three registers. Pops rightmost register first (from lower address). |
| 651 | void Pop(Register src1, Register src2, Register src3) { |
| 652 | lw(src3, MemOperand(sp, 0 * kPointerSize)); |
| 653 | lw(src2, MemOperand(sp, 1 * kPointerSize)); |
| 654 | lw(src1, MemOperand(sp, 2 * kPointerSize)); |
| 655 | Addu(sp, sp, 3 * kPointerSize); |
| 656 | } |
| 657 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 658 | void Pop(uint32_t count = 1) { |
| 659 | Addu(sp, sp, Operand(count * kPointerSize)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 660 | } |
| 661 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 662 | // Push and pop the registers that can hold pointers, as defined by the |
| 663 | // RegList constant kSafepointSavedRegisters. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 664 | void PushSafepointRegisters(); |
| 665 | void PopSafepointRegisters(); |
| 666 | void PushSafepointRegistersAndDoubles(); |
| 667 | void PopSafepointRegistersAndDoubles(); |
| 668 | // Store value in register src in the safepoint stack slot for |
| 669 | // register dst. |
| 670 | void StoreToSafepointRegisterSlot(Register src, Register dst); |
| 671 | void StoreToSafepointRegistersAndDoublesSlot(Register src, Register dst); |
| 672 | // Load the value of the src register from its safepoint stack slot |
| 673 | // into register dst. |
| 674 | void LoadFromSafepointRegisterSlot(Register dst, Register src); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 675 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 676 | // Flush the I-cache from asm code. You should use CPU::FlushICache from C. |
| 677 | // Does not handle errors. |
| 678 | void FlushICache(Register address, unsigned instructions); |
| 679 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 680 | // MIPS32 R2 instruction macro. |
| 681 | void Ins(Register rt, Register rs, uint16_t pos, uint16_t size); |
| 682 | void Ext(Register rt, Register rs, uint16_t pos, uint16_t size); |
| 683 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 684 | // --------------------------------------------------------------------------- |
| 685 | // FPU macros. These do not handle special cases like NaN or +- inf. |
| 686 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 687 | // Convert unsigned word to double. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 688 | void Cvt_d_uw(FPURegister fd, FPURegister fs, FPURegister scratch); |
| 689 | void Cvt_d_uw(FPURegister fd, Register rs, FPURegister scratch); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 690 | |
| 691 | // Convert double to unsigned word. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 692 | void Trunc_uw_d(FPURegister fd, FPURegister fs, FPURegister scratch); |
| 693 | void Trunc_uw_d(FPURegister fd, Register rs, FPURegister scratch); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 694 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 695 | // Wrapper function for the different cmp/branch types. |
| 696 | void BranchF(Label* target, |
| 697 | Label* nan, |
| 698 | Condition cc, |
| 699 | FPURegister cmp1, |
| 700 | FPURegister cmp2, |
| 701 | BranchDelaySlot bd = PROTECT); |
| 702 | |
| 703 | // Alternate (inline) version for better readability with USE_DELAY_SLOT. |
| 704 | inline void BranchF(BranchDelaySlot bd, |
| 705 | Label* target, |
| 706 | Label* nan, |
| 707 | Condition cc, |
| 708 | FPURegister cmp1, |
| 709 | FPURegister cmp2) { |
| 710 | BranchF(target, nan, cc, cmp1, cmp2, bd); |
| 711 | }; |
| 712 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 713 | // Convert the HeapNumber pointed to by source to a 32bits signed integer |
| 714 | // dest. If the HeapNumber does not fit into a 32bits signed integer branch |
| 715 | // to not_int32 label. If FPU is available double_scratch is used but not |
| 716 | // scratch2. |
| 717 | void ConvertToInt32(Register source, |
| 718 | Register dest, |
| 719 | Register scratch, |
| 720 | Register scratch2, |
| 721 | FPURegister double_scratch, |
| 722 | Label *not_int32); |
| 723 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 724 | // Truncates a double using a specific rounding mode. |
| 725 | // The except_flag will contain any exceptions caused by the instruction. |
| 726 | // If check_inexact is kDontCheckForInexactConversion, then the inexacat |
| 727 | // exception is masked. |
| 728 | void EmitFPUTruncate(FPURoundingMode rounding_mode, |
| 729 | FPURegister result, |
| 730 | DoubleRegister double_input, |
| 731 | Register scratch1, |
| 732 | Register except_flag, |
| 733 | CheckForInexactConversion check_inexact |
| 734 | = kDontCheckForInexactConversion); |
| 735 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 736 | // Helper for EmitECMATruncate. |
| 737 | // This will truncate a floating-point value outside of the singed 32bit |
| 738 | // integer range to a 32bit signed integer. |
| 739 | // Expects the double value loaded in input_high and input_low. |
| 740 | // Exits with the answer in 'result'. |
| 741 | // Note that this code does not work for values in the 32bit range! |
| 742 | void EmitOutOfInt32RangeTruncate(Register result, |
| 743 | Register input_high, |
| 744 | Register input_low, |
| 745 | Register scratch); |
| 746 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 747 | // Performs a truncating conversion of a floating point number as used by |
| 748 | // the JS bitwise operations. See ECMA-262 9.5: ToInt32. |
| 749 | // Exits with 'result' holding the answer and all other registers clobbered. |
| 750 | void EmitECMATruncate(Register result, |
| 751 | FPURegister double_input, |
| 752 | FPURegister single_scratch, |
| 753 | Register scratch, |
| 754 | Register scratch2, |
| 755 | Register scratch3); |
| 756 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 757 | // Enter exit frame. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 758 | // argc - argument count to be dropped by LeaveExitFrame. |
| 759 | // save_doubles - saves FPU registers on stack, currently disabled. |
| 760 | // stack_space - extra stack space. |
| 761 | void EnterExitFrame(bool save_doubles, |
| 762 | int stack_space = 0); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 763 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 764 | // Leave the current exit frame. |
| 765 | void LeaveExitFrame(bool save_doubles, Register arg_count); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 766 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 767 | // Get the actual activation frame alignment for target environment. |
| 768 | static int ActivationFrameAlignment(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 769 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 770 | // Make sure the stack is aligned. Only emits code in debug mode. |
| 771 | void AssertStackIsAligned(); |
| 772 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 773 | void LoadContext(Register dst, int context_chain_length); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 774 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 775 | void LoadGlobalFunction(int index, Register function); |
| 776 | |
| 777 | // Load the initial map from the global function. The registers |
| 778 | // function and map can be the same, function is then overwritten. |
| 779 | void LoadGlobalFunctionInitialMap(Register function, |
| 780 | Register map, |
| 781 | Register scratch); |
| 782 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 783 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 784 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 785 | // JavaScript invokes. |
| 786 | |
| 787 | // Setup call kind marking in t1. The method takes t1 as an |
| 788 | // explicit first parameter to make the code more readable at the |
| 789 | // call sites. |
| 790 | void SetCallKind(Register dst, CallKind kind); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 791 | |
| 792 | // Invoke the JavaScript function code by either calling or jumping. |
| 793 | void InvokeCode(Register code, |
| 794 | const ParameterCount& expected, |
| 795 | const ParameterCount& actual, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 796 | InvokeFlag flag, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 797 | const CallWrapper& call_wrapper, |
| 798 | CallKind call_kind); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 799 | |
| 800 | void InvokeCode(Handle<Code> code, |
| 801 | const ParameterCount& expected, |
| 802 | const ParameterCount& actual, |
| 803 | RelocInfo::Mode rmode, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 804 | InvokeFlag flag, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 805 | CallKind call_kind); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 806 | |
| 807 | // Invoke the JavaScript function in the given register. Changes the |
| 808 | // current context to the context in the function before invoking. |
| 809 | void InvokeFunction(Register function, |
| 810 | const ParameterCount& actual, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 811 | InvokeFlag flag, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 812 | const CallWrapper& call_wrapper, |
| 813 | CallKind call_kind); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 814 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 815 | void InvokeFunction(Handle<JSFunction> function, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 816 | const ParameterCount& actual, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 817 | InvokeFlag flag, |
| 818 | CallKind call_kind); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 819 | |
| 820 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 821 | void IsObjectJSObjectType(Register heap_object, |
| 822 | Register map, |
| 823 | Register scratch, |
| 824 | Label* fail); |
| 825 | |
| 826 | void IsInstanceJSObjectType(Register map, |
| 827 | Register scratch, |
| 828 | Label* fail); |
| 829 | |
| 830 | void IsObjectJSStringType(Register object, |
| 831 | Register scratch, |
| 832 | Label* fail); |
| 833 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 834 | #ifdef ENABLE_DEBUGGER_SUPPORT |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 835 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 836 | // Debugger Support. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 837 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 838 | void DebugBreak(); |
| 839 | #endif |
| 840 | |
| 841 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 842 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 843 | // Exception handling. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 844 | |
| 845 | // Push a new try handler and link into try handler chain. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 846 | void PushTryHandler(CodeLocation try_location, |
| 847 | HandlerType type, |
| 848 | int handler_index); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 849 | |
| 850 | // Unlink the stack handler on top of the stack from the try handler chain. |
| 851 | // Must preserve the result register. |
| 852 | void PopTryHandler(); |
| 853 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 854 | // Passes thrown value (in v0) to the handler of top of the try handler chain. |
| 855 | void Throw(Register value); |
| 856 | |
| 857 | // Propagates an uncatchable exception to the top of the current JS stack's |
| 858 | // handler chain. |
| 859 | void ThrowUncatchable(UncatchableExceptionType type, Register value); |
| 860 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 861 | // Copies a fixed number of fields of heap objects from src to dst. |
| 862 | void CopyFields(Register dst, Register src, RegList temps, int field_count); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 863 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 864 | // Copies a number of bytes from src to dst. All registers are clobbered. On |
| 865 | // exit src and dst will point to the place just after where the last byte was |
| 866 | // read or written and length will be zero. |
| 867 | void CopyBytes(Register src, |
| 868 | Register dst, |
| 869 | Register length, |
| 870 | Register scratch); |
| 871 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 872 | // Initialize fields with filler values. Fields starting at |start_offset| |
| 873 | // not including end_offset are overwritten with the value in |filler|. At |
| 874 | // the end the loop, |start_offset| takes the value of |end_offset|. |
| 875 | void InitializeFieldsWithFiller(Register start_offset, |
| 876 | Register end_offset, |
| 877 | Register filler); |
| 878 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 879 | // ------------------------------------------------------------------------- |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 880 | // Support functions. |
| 881 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 882 | // Try to get function prototype of a function and puts the value in |
| 883 | // the result register. Checks that the function really is a |
| 884 | // function and jumps to the miss label if the fast checks fail. The |
| 885 | // function register will be untouched; the other registers may be |
| 886 | // clobbered. |
| 887 | void TryGetFunctionPrototype(Register function, |
| 888 | Register result, |
| 889 | Register scratch, |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 890 | Label* miss, |
| 891 | bool miss_on_bound_function = false); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 892 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 893 | void GetObjectType(Register function, |
| 894 | Register map, |
| 895 | Register type_reg); |
| 896 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 897 | // Check if a map for a JSObject indicates that the object has fast elements. |
| 898 | // Jump to the specified label if it does not. |
| 899 | void CheckFastElements(Register map, |
| 900 | Register scratch, |
| 901 | Label* fail); |
| 902 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 903 | // Check if a map for a JSObject indicates that the object can have both smi |
| 904 | // and HeapObject elements. Jump to the specified label if it does not. |
| 905 | void CheckFastObjectElements(Register map, |
| 906 | Register scratch, |
| 907 | Label* fail); |
| 908 | |
| 909 | // Check if a map for a JSObject indicates that the object has fast smi only |
| 910 | // elements. Jump to the specified label if it does not. |
| 911 | void CheckFastSmiOnlyElements(Register map, |
| 912 | Register scratch, |
| 913 | Label* fail); |
| 914 | |
| 915 | // Check to see if maybe_number can be stored as a double in |
| 916 | // FastDoubleElements. If it can, store it at the index specified by key in |
| 917 | // the FastDoubleElements array elements, otherwise jump to fail. |
| 918 | void StoreNumberToDoubleElements(Register value_reg, |
| 919 | Register key_reg, |
| 920 | Register receiver_reg, |
| 921 | Register elements_reg, |
| 922 | Register scratch1, |
| 923 | Register scratch2, |
| 924 | Register scratch3, |
| 925 | Register scratch4, |
| 926 | Label* fail); |
| 927 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 928 | // Check if the map of an object is equal to a specified map (either |
| 929 | // given directly or as an index into the root list) and branch to |
| 930 | // label if not. Skip the smi check if not required (object is known |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 931 | // to be a heap object). |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 932 | void CheckMap(Register obj, |
| 933 | Register scratch, |
| 934 | Handle<Map> map, |
| 935 | Label* fail, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 936 | SmiCheckType smi_check_type); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 937 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 938 | void CheckMap(Register obj, |
| 939 | Register scratch, |
| 940 | Heap::RootListIndex index, |
| 941 | Label* fail, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 942 | SmiCheckType smi_check_type); |
| 943 | |
| 944 | // Check if the map of an object is equal to a specified map and branch to a |
| 945 | // specified target if equal. Skip the smi check if not required (object is |
| 946 | // known to be a heap object) |
| 947 | void DispatchMap(Register obj, |
| 948 | Register scratch, |
| 949 | Handle<Map> map, |
| 950 | Handle<Code> success, |
| 951 | SmiCheckType smi_check_type); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 952 | |
| 953 | // Generates code for reporting that an illegal operation has |
| 954 | // occurred. |
| 955 | void IllegalOperation(int num_arguments); |
| 956 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 957 | |
| 958 | // Load and check the instance type of an object for being a string. |
| 959 | // Loads the type into the second argument register. |
| 960 | // Returns a condition that will be enabled if the object was a string. |
| 961 | Condition IsObjectStringType(Register obj, |
| 962 | Register type, |
| 963 | Register result) { |
| 964 | lw(type, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| 965 | lbu(type, FieldMemOperand(type, Map::kInstanceTypeOffset)); |
| 966 | And(type, type, Operand(kIsNotStringMask)); |
| 967 | ASSERT_EQ(0, kStringTag); |
| 968 | return eq; |
| 969 | } |
| 970 | |
| 971 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 972 | // Picks out an array index from the hash field. |
| 973 | // Register use: |
| 974 | // hash - holds the index's hash. Clobbered. |
| 975 | // index - holds the overwritten index on exit. |
| 976 | void IndexFromHash(Register hash, Register index); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 977 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 978 | // Get the number of least significant bits from a register. |
| 979 | void GetLeastBitsFromSmi(Register dst, Register src, int num_least_bits); |
| 980 | void GetLeastBitsFromInt32(Register dst, Register src, int mun_least_bits); |
| 981 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 982 | // Load the value of a number object into a FPU double register. If the |
| 983 | // object is not a number a jump to the label not_number is performed |
| 984 | // and the FPU double register is unchanged. |
| 985 | void ObjectToDoubleFPURegister( |
| 986 | Register object, |
| 987 | FPURegister value, |
| 988 | Register scratch1, |
| 989 | Register scratch2, |
| 990 | Register heap_number_map, |
| 991 | Label* not_number, |
| 992 | ObjectToDoubleFlags flags = NO_OBJECT_TO_DOUBLE_FLAGS); |
| 993 | |
| 994 | // Load the value of a smi object into a FPU double register. The register |
| 995 | // scratch1 can be the same register as smi in which case smi will hold the |
| 996 | // untagged value afterwards. |
| 997 | void SmiToDoubleFPURegister(Register smi, |
| 998 | FPURegister value, |
| 999 | Register scratch1); |
| 1000 | |
| 1001 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1002 | // Overflow handling functions. |
| 1003 | // Usage: first call the appropriate arithmetic function, then call one of the |
| 1004 | // jump functions with the overflow_dst register as the second parameter. |
| 1005 | |
| 1006 | void AdduAndCheckForOverflow(Register dst, |
| 1007 | Register left, |
| 1008 | Register right, |
| 1009 | Register overflow_dst, |
| 1010 | Register scratch = at); |
| 1011 | |
| 1012 | void SubuAndCheckForOverflow(Register dst, |
| 1013 | Register left, |
| 1014 | Register right, |
| 1015 | Register overflow_dst, |
| 1016 | Register scratch = at); |
| 1017 | |
| 1018 | void BranchOnOverflow(Label* label, |
| 1019 | Register overflow_check, |
| 1020 | BranchDelaySlot bd = PROTECT) { |
| 1021 | Branch(label, lt, overflow_check, Operand(zero_reg), bd); |
| 1022 | } |
| 1023 | |
| 1024 | void BranchOnNoOverflow(Label* label, |
| 1025 | Register overflow_check, |
| 1026 | BranchDelaySlot bd = PROTECT) { |
| 1027 | Branch(label, ge, overflow_check, Operand(zero_reg), bd); |
| 1028 | } |
| 1029 | |
| 1030 | void RetOnOverflow(Register overflow_check, BranchDelaySlot bd = PROTECT) { |
| 1031 | Ret(lt, overflow_check, Operand(zero_reg), bd); |
| 1032 | } |
| 1033 | |
| 1034 | void RetOnNoOverflow(Register overflow_check, BranchDelaySlot bd = PROTECT) { |
| 1035 | Ret(ge, overflow_check, Operand(zero_reg), bd); |
| 1036 | } |
| 1037 | |
| 1038 | // ------------------------------------------------------------------------- |
| 1039 | // Runtime calls. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1040 | |
| 1041 | // Call a code stub. |
| 1042 | void CallStub(CodeStub* stub, Condition cond = cc_always, |
| 1043 | Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1044 | |
| 1045 | // Tail call a code stub (jump). |
| 1046 | void TailCallStub(CodeStub* stub); |
| 1047 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1048 | void CallJSExitStub(CodeStub* stub); |
| 1049 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1050 | // Call a runtime routine. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1051 | void CallRuntime(const Runtime::Function* f, int num_arguments); |
| 1052 | void CallRuntimeSaveDoubles(Runtime::FunctionId id); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1053 | |
| 1054 | // Convenience function: Same as above, but takes the fid instead. |
| 1055 | void CallRuntime(Runtime::FunctionId fid, int num_arguments); |
| 1056 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1057 | // Convenience function: call an external reference. |
| 1058 | void CallExternalReference(const ExternalReference& ext, |
| 1059 | int num_arguments); |
| 1060 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1061 | // Tail call of a runtime routine (jump). |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1062 | // Like JumpToExternalReference, but also takes care of passing the number |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1063 | // of parameters. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1064 | void TailCallExternalReference(const ExternalReference& ext, |
| 1065 | int num_arguments, |
| 1066 | int result_size); |
| 1067 | |
| 1068 | // Convenience function: tail call a runtime routine (jump). |
| 1069 | void TailCallRuntime(Runtime::FunctionId fid, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1070 | int num_arguments, |
| 1071 | int result_size); |
| 1072 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1073 | int CalculateStackPassedWords(int num_reg_arguments, |
| 1074 | int num_double_arguments); |
| 1075 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1076 | // Before calling a C-function from generated code, align arguments on stack |
| 1077 | // and add space for the four mips argument slots. |
| 1078 | // After aligning the frame, non-register arguments must be stored on the |
| 1079 | // stack, after the argument-slots using helper: CFunctionArgumentOperand(). |
| 1080 | // The argument count assumes all arguments are word sized. |
| 1081 | // Some compilers/platforms require the stack to be aligned when calling |
| 1082 | // C++ code. |
| 1083 | // Needs a scratch register to do some arithmetic. This register will be |
| 1084 | // trashed. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1085 | void PrepareCallCFunction(int num_reg_arguments, |
| 1086 | int num_double_registers, |
| 1087 | Register scratch); |
| 1088 | void PrepareCallCFunction(int num_reg_arguments, |
| 1089 | Register scratch); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1090 | |
| 1091 | // Arguments 1-4 are placed in registers a0 thru a3 respectively. |
| 1092 | // Arguments 5..n are stored to stack using following: |
| 1093 | // sw(t0, CFunctionArgumentOperand(5)); |
| 1094 | |
| 1095 | // Calls a C function and cleans up the space for arguments allocated |
| 1096 | // by PrepareCallCFunction. The called function is not allowed to trigger a |
| 1097 | // garbage collection, since that might move the code and invalidate the |
| 1098 | // return address (unless this is somehow accounted for by the called |
| 1099 | // function). |
| 1100 | void CallCFunction(ExternalReference function, int num_arguments); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1101 | void CallCFunction(Register function, int num_arguments); |
| 1102 | void CallCFunction(ExternalReference function, |
| 1103 | int num_reg_arguments, |
| 1104 | int num_double_arguments); |
| 1105 | void CallCFunction(Register function, |
| 1106 | int num_reg_arguments, |
| 1107 | int num_double_arguments); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1108 | void GetCFunctionDoubleResult(const DoubleRegister dst); |
| 1109 | |
| 1110 | // There are two ways of passing double arguments on MIPS, depending on |
| 1111 | // whether soft or hard floating point ABI is used. These functions |
| 1112 | // abstract parameter passing for the three different ways we call |
| 1113 | // C functions from generated code. |
| 1114 | void SetCallCDoubleArguments(DoubleRegister dreg); |
| 1115 | void SetCallCDoubleArguments(DoubleRegister dreg1, DoubleRegister dreg2); |
| 1116 | void SetCallCDoubleArguments(DoubleRegister dreg, Register reg); |
| 1117 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1118 | // Calls an API function. Allocates HandleScope, extracts returned value |
| 1119 | // from handle and propagates exceptions. Restores context. stack_space |
| 1120 | // - space to be unwound on exit (includes the call js arguments space and |
| 1121 | // the additional space allocated for the fast call). |
| 1122 | void CallApiFunctionAndReturn(ExternalReference function, int stack_space); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1123 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1124 | // Jump to the builtin routine. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1125 | void JumpToExternalReference(const ExternalReference& builtin); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1126 | |
| 1127 | // Invoke specified builtin JavaScript function. Adds an entry to |
| 1128 | // the unresolved list if the name does not resolve. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1129 | void InvokeBuiltin(Builtins::JavaScript id, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1130 | InvokeFlag flag, |
| 1131 | const CallWrapper& call_wrapper = NullCallWrapper()); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1132 | |
| 1133 | // 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] | 1134 | // setup the function in a1. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1135 | void GetBuiltinEntry(Register target, Builtins::JavaScript id); |
| 1136 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1137 | // Store the function for the given builtin in the target register. |
| 1138 | void GetBuiltinFunction(Register target, Builtins::JavaScript id); |
| 1139 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1140 | struct Unresolved { |
| 1141 | int pc; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1142 | uint32_t flags; // See Bootstrapper::FixupFlags decoders/encoders. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1143 | const char* name; |
| 1144 | }; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1145 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1146 | Handle<Object> CodeObject() { |
| 1147 | ASSERT(!code_object_.is_null()); |
| 1148 | return code_object_; |
| 1149 | } |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1150 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1151 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1152 | // StatsCounter support. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1153 | |
| 1154 | void SetCounter(StatsCounter* counter, int value, |
| 1155 | Register scratch1, Register scratch2); |
| 1156 | void IncrementCounter(StatsCounter* counter, int value, |
| 1157 | Register scratch1, Register scratch2); |
| 1158 | void DecrementCounter(StatsCounter* counter, int value, |
| 1159 | Register scratch1, Register scratch2); |
| 1160 | |
| 1161 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1162 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1163 | // Debugging. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1164 | |
| 1165 | // Calls Abort(msg) if the condition cc is not satisfied. |
| 1166 | // Use --debug_code to enable. |
| 1167 | void Assert(Condition cc, const char* msg, Register rs, Operand rt); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1168 | void AssertRegisterIsRoot(Register reg, Heap::RootListIndex index); |
| 1169 | void AssertFastElements(Register elements); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1170 | |
| 1171 | // Like Assert(), but always enabled. |
| 1172 | void Check(Condition cc, const char* msg, Register rs, Operand rt); |
| 1173 | |
| 1174 | // Print a message to stdout and abort execution. |
| 1175 | void Abort(const char* msg); |
| 1176 | |
| 1177 | // Verify restrictions about code generated in stubs. |
| 1178 | void set_generating_stub(bool value) { generating_stub_ = value; } |
| 1179 | bool generating_stub() { return generating_stub_; } |
| 1180 | void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; } |
| 1181 | bool allow_stub_calls() { return allow_stub_calls_; } |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1182 | void set_has_frame(bool value) { has_frame_ = value; } |
| 1183 | bool has_frame() { return has_frame_; } |
| 1184 | inline bool AllowThisStubCall(CodeStub* stub); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1185 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1186 | // --------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1187 | // Number utilities. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1188 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1189 | // Check whether the value of reg is a power of two and not zero. If not |
| 1190 | // control continues at the label not_power_of_two. If reg is a power of two |
| 1191 | // the register scratch contains the value of (reg - 1) when control falls |
| 1192 | // through. |
| 1193 | void JumpIfNotPowerOfTwoOrZero(Register reg, |
| 1194 | Register scratch, |
| 1195 | Label* not_power_of_two_or_zero); |
| 1196 | |
| 1197 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1198 | // Smi utilities. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1199 | |
| 1200 | // Try to convert int32 to smi. If the value is to large, preserve |
| 1201 | // the original value and jump to not_a_smi. Destroys scratch and |
| 1202 | // sets flags. |
| 1203 | // This is only used by crankshaft atm so it is unimplemented on MIPS. |
| 1204 | void TrySmiTag(Register reg, Label* not_a_smi, Register scratch) { |
| 1205 | UNIMPLEMENTED_MIPS(); |
| 1206 | } |
| 1207 | |
| 1208 | void SmiTag(Register reg) { |
| 1209 | Addu(reg, reg, reg); |
| 1210 | } |
| 1211 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1212 | // Test for overflow < 0: use BranchOnOverflow() or BranchOnNoOverflow(). |
| 1213 | void SmiTagCheckOverflow(Register reg, Register overflow) { |
| 1214 | mov(overflow, reg); // Save original value. |
| 1215 | addu(reg, reg, reg); |
| 1216 | xor_(overflow, overflow, reg); // Overflow if (value ^ 2 * value) < 0. |
| 1217 | } |
| 1218 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1219 | void SmiTag(Register dst, Register src) { |
| 1220 | Addu(dst, src, src); |
| 1221 | } |
| 1222 | |
| 1223 | void SmiUntag(Register reg) { |
| 1224 | sra(reg, reg, kSmiTagSize); |
| 1225 | } |
| 1226 | |
| 1227 | void SmiUntag(Register dst, Register src) { |
| 1228 | sra(dst, src, kSmiTagSize); |
| 1229 | } |
| 1230 | |
| 1231 | // Jump the register contains a smi. |
| 1232 | inline void JumpIfSmi(Register value, Label* smi_label, |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1233 | Register scratch = at, |
| 1234 | BranchDelaySlot bd = PROTECT) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1235 | ASSERT_EQ(0, kSmiTag); |
| 1236 | andi(scratch, value, kSmiTagMask); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1237 | Branch(bd, smi_label, eq, scratch, Operand(zero_reg)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1238 | } |
| 1239 | |
| 1240 | // Jump if the register contains a non-smi. |
| 1241 | inline void JumpIfNotSmi(Register value, Label* not_smi_label, |
| 1242 | Register scratch = at) { |
| 1243 | ASSERT_EQ(0, kSmiTag); |
| 1244 | andi(scratch, value, kSmiTagMask); |
| 1245 | Branch(not_smi_label, ne, scratch, Operand(zero_reg)); |
| 1246 | } |
| 1247 | |
| 1248 | // Jump if either of the registers contain a non-smi. |
| 1249 | void JumpIfNotBothSmi(Register reg1, Register reg2, Label* on_not_both_smi); |
| 1250 | // Jump if either of the registers contain a smi. |
| 1251 | void JumpIfEitherSmi(Register reg1, Register reg2, Label* on_either_smi); |
| 1252 | |
| 1253 | // Abort execution if argument is a smi. Used in debug code. |
| 1254 | void AbortIfSmi(Register object); |
| 1255 | void AbortIfNotSmi(Register object); |
| 1256 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1257 | // Abort execution if argument is a string. Used in debug code. |
| 1258 | void AbortIfNotString(Register object); |
| 1259 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1260 | // Abort execution if argument is not the root value with the given index. |
| 1261 | void AbortIfNotRootValue(Register src, |
| 1262 | Heap::RootListIndex root_value_index, |
| 1263 | const char* message); |
| 1264 | |
| 1265 | // --------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1266 | // HeapNumber utilities. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1267 | |
| 1268 | void JumpIfNotHeapNumber(Register object, |
| 1269 | Register heap_number_map, |
| 1270 | Register scratch, |
| 1271 | Label* on_not_heap_number); |
| 1272 | |
| 1273 | // ------------------------------------------------------------------------- |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1274 | // String utilities. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1275 | |
| 1276 | // Checks if both instance types are sequential ASCII strings and jumps to |
| 1277 | // label if either is not. |
| 1278 | void JumpIfBothInstanceTypesAreNotSequentialAscii( |
| 1279 | Register first_object_instance_type, |
| 1280 | Register second_object_instance_type, |
| 1281 | Register scratch1, |
| 1282 | Register scratch2, |
| 1283 | Label* failure); |
| 1284 | |
| 1285 | // Check if instance type is sequential ASCII string and jump to label if |
| 1286 | // it is not. |
| 1287 | void JumpIfInstanceTypeIsNotSequentialAscii(Register type, |
| 1288 | Register scratch, |
| 1289 | Label* failure); |
| 1290 | |
| 1291 | // Test that both first and second are sequential ASCII strings. |
| 1292 | // Assume that they are non-smis. |
| 1293 | void JumpIfNonSmisNotBothSequentialAsciiStrings(Register first, |
| 1294 | Register second, |
| 1295 | Register scratch1, |
| 1296 | Register scratch2, |
| 1297 | Label* failure); |
| 1298 | |
| 1299 | // Test that both first and second are sequential ASCII strings. |
| 1300 | // Check that they are non-smis. |
| 1301 | void JumpIfNotBothSequentialAsciiStrings(Register first, |
| 1302 | Register second, |
| 1303 | Register scratch1, |
| 1304 | Register scratch2, |
| 1305 | Label* failure); |
| 1306 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1307 | void ClampUint8(Register output_reg, Register input_reg); |
| 1308 | |
| 1309 | void ClampDoubleToUint8(Register result_reg, |
| 1310 | DoubleRegister input_reg, |
| 1311 | DoubleRegister temp_double_reg); |
| 1312 | |
| 1313 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1314 | void LoadInstanceDescriptors(Register map, Register descriptors); |
| 1315 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1316 | |
| 1317 | // Activation support. |
| 1318 | void EnterFrame(StackFrame::Type type); |
| 1319 | void LeaveFrame(StackFrame::Type type); |
| 1320 | |
| 1321 | // Patch the relocated value (lui/ori pair). |
| 1322 | void PatchRelocatedValue(Register li_location, |
| 1323 | Register scratch, |
| 1324 | Register new_value); |
| 1325 | // Get the relocatad value (loaded data) from the lui/ori pair. |
| 1326 | void GetRelocatedValue(Register li_location, |
| 1327 | Register value, |
| 1328 | Register scratch); |
| 1329 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1330 | private: |
| 1331 | void CallCFunctionHelper(Register function, |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1332 | int num_reg_arguments, |
| 1333 | int num_double_arguments); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1334 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1335 | void BranchShort(int16_t offset, BranchDelaySlot bdslot = PROTECT); |
| 1336 | void BranchShort(int16_t offset, Condition cond, Register rs, |
| 1337 | const Operand& rt, |
| 1338 | BranchDelaySlot bdslot = PROTECT); |
| 1339 | void BranchShort(Label* L, BranchDelaySlot bdslot = PROTECT); |
| 1340 | void BranchShort(Label* L, Condition cond, Register rs, |
| 1341 | const Operand& rt, |
| 1342 | BranchDelaySlot bdslot = PROTECT); |
| 1343 | void BranchAndLinkShort(int16_t offset, BranchDelaySlot bdslot = PROTECT); |
| 1344 | void BranchAndLinkShort(int16_t offset, Condition cond, Register rs, |
| 1345 | const Operand& rt, |
| 1346 | BranchDelaySlot bdslot = PROTECT); |
| 1347 | void BranchAndLinkShort(Label* L, BranchDelaySlot bdslot = PROTECT); |
| 1348 | void BranchAndLinkShort(Label* L, Condition cond, Register rs, |
| 1349 | const Operand& rt, |
| 1350 | BranchDelaySlot bdslot = PROTECT); |
| 1351 | void J(Label* L, BranchDelaySlot bdslot); |
| 1352 | void Jr(Label* L, BranchDelaySlot bdslot); |
| 1353 | void Jalr(Label* L, BranchDelaySlot bdslot); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1354 | |
| 1355 | // Helper functions for generating invokes. |
| 1356 | void InvokePrologue(const ParameterCount& expected, |
| 1357 | const ParameterCount& actual, |
| 1358 | Handle<Code> code_constant, |
| 1359 | Register code_reg, |
| 1360 | Label* done, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1361 | InvokeFlag flag, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1362 | const CallWrapper& call_wrapper, |
| 1363 | CallKind call_kind); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1364 | |
| 1365 | // Get the code for the given builtin. Returns if able to resolve |
| 1366 | // the function in the 'resolved' flag. |
| 1367 | Handle<Code> ResolveBuiltin(Builtins::JavaScript id, bool* resolved); |
| 1368 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1369 | void InitializeNewString(Register string, |
| 1370 | Register length, |
| 1371 | Heap::RootListIndex map_index, |
| 1372 | Register scratch1, |
| 1373 | Register scratch2); |
| 1374 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1375 | // Helper for implementing JumpIfNotInNewSpace and JumpIfInNewSpace. |
| 1376 | void InNewSpace(Register object, |
| 1377 | Register scratch, |
| 1378 | Condition cond, // eq for new space, ne otherwise. |
| 1379 | Label* branch); |
| 1380 | |
| 1381 | // Helper for finding the mark bits for an address. Afterwards, the |
| 1382 | // bitmap register points at the word with the mark bits and the mask |
| 1383 | // the position of the first bit. Leaves addr_reg unchanged. |
| 1384 | inline void GetMarkBits(Register addr_reg, |
| 1385 | Register bitmap_reg, |
| 1386 | Register mask_reg); |
| 1387 | |
| 1388 | // Helper for throwing exceptions. Compute a handler address and jump to |
| 1389 | // it. See the implementation for register usage. |
| 1390 | void JumpToHandlerEntry(); |
| 1391 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1392 | // Compute memory operands for safepoint stack slots. |
| 1393 | static int SafepointRegisterStackIndex(int reg_code); |
| 1394 | MemOperand SafepointRegisterSlot(Register reg); |
| 1395 | MemOperand SafepointRegistersAndDoublesSlot(Register reg); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1396 | |
| 1397 | bool generating_stub_; |
| 1398 | bool allow_stub_calls_; |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1399 | bool has_frame_; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1400 | // This handle will be patched with the code object on installation. |
| 1401 | Handle<Object> code_object_; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1402 | |
| 1403 | // Needs access to SafepointRegisterStackIndex for optimized frame |
| 1404 | // traversal. |
| 1405 | friend class OptimizedFrame; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1406 | }; |
| 1407 | |
| 1408 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1409 | // The code patcher is used to patch (typically) small parts of code e.g. for |
| 1410 | // debugging and other types of instrumentation. When using the code patcher |
| 1411 | // the exact number of bytes specified must be emitted. It is not legal to emit |
| 1412 | // relocation information. If any of these constraints are violated it causes |
| 1413 | // an assertion to fail. |
| 1414 | class CodePatcher { |
| 1415 | public: |
| 1416 | CodePatcher(byte* address, int instructions); |
| 1417 | virtual ~CodePatcher(); |
| 1418 | |
| 1419 | // Macro assembler to emit code. |
| 1420 | MacroAssembler* masm() { return &masm_; } |
| 1421 | |
| 1422 | // Emit an instruction directly. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1423 | void Emit(Instr instr); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1424 | |
| 1425 | // Emit an address directly. |
| 1426 | void Emit(Address addr); |
| 1427 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1428 | // Change the condition part of an instruction leaving the rest of the current |
| 1429 | // instruction unchanged. |
| 1430 | void ChangeBranchCondition(Condition cond); |
| 1431 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1432 | private: |
| 1433 | byte* address_; // The address of the code being patched. |
| 1434 | int instructions_; // Number of instructions of the expected patch size. |
| 1435 | int size_; // Number of bytes of the expected patch size. |
| 1436 | MacroAssembler masm_; // Macro assembler used to generate the code. |
| 1437 | }; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1438 | |
| 1439 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1440 | |
| 1441 | #ifdef GENERATED_CODE_COVERAGE |
| 1442 | #define CODE_COVERAGE_STRINGIFY(x) #x |
| 1443 | #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x) |
| 1444 | #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__) |
| 1445 | #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm-> |
| 1446 | #else |
| 1447 | #define ACCESS_MASM(masm) masm-> |
| 1448 | #endif |
| 1449 | |
| 1450 | } } // namespace v8::internal |
| 1451 | |
| 1452 | #endif // V8_MIPS_MACRO_ASSEMBLER_MIPS_H_ |