vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +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 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 28 | #ifndef V8_X64_MACRO_ASSEMBLER_X64_H_ |
| 29 | #define V8_X64_MACRO_ASSEMBLER_X64_H_ |
| 30 | |
| 31 | #include "assembler.h" |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 32 | #include "v8globals.h" |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 33 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 34 | namespace v8 { |
| 35 | namespace internal { |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 36 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 37 | // Flags used for the AllocateInNewSpace functions. |
| 38 | enum AllocationFlags { |
| 39 | // No special flags. |
| 40 | NO_ALLOCATION_FLAGS = 0, |
| 41 | // Return the pointer to the allocated already tagged as a heap object. |
| 42 | TAG_OBJECT = 1 << 0, |
| 43 | // The content of the result register already contains the allocation top in |
| 44 | // new space. |
| 45 | RESULT_CONTAINS_TOP = 1 << 1 |
| 46 | }; |
| 47 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 48 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 49 | // Default scratch register used by MacroAssembler (and other code that needs |
| 50 | // a spare register). The register isn't callee save, and not used by the |
| 51 | // function calling convention. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 52 | static const Register kScratchRegister = { 10 }; // r10. |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 53 | static const Register kSmiConstantRegister = { 12 }; // r12 (callee save). |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 54 | static const Register kRootRegister = { 13 }; // r13 (callee save). |
| 55 | // Value of smi in kSmiConstantRegister. |
| 56 | static const int kSmiConstantRegisterValue = 1; |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 57 | // Actual value of root register is offset from the root array's start |
| 58 | // to take advantage of negitive 8-bit displacement values. |
| 59 | static const int kRootRegisterBias = 128; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 60 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 61 | // Convenience for platform-independent signatures. |
| 62 | typedef Operand MemOperand; |
| 63 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 64 | // Forward declaration. |
| 65 | class JumpTarget; |
| 66 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 67 | struct SmiIndex { |
| 68 | SmiIndex(Register index_register, ScaleFactor scale) |
| 69 | : reg(index_register), |
| 70 | scale(scale) {} |
| 71 | Register reg; |
| 72 | ScaleFactor scale; |
| 73 | }; |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 74 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 75 | // MacroAssembler implements a collection of frequently used macros. |
| 76 | class MacroAssembler: public Assembler { |
| 77 | public: |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 78 | // The isolate parameter can be NULL if the macro assembler should |
| 79 | // not use isolate-dependent functionality. In this case, it's the |
| 80 | // responsibility of the caller to never invoke such function on the |
| 81 | // macro assembler. |
| 82 | MacroAssembler(Isolate* isolate, void* buffer, int size); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 83 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 84 | // Prevent the use of the RootArray during the lifetime of this |
| 85 | // scope object. |
| 86 | class NoRootArrayScope BASE_EMBEDDED { |
| 87 | public: |
| 88 | explicit NoRootArrayScope(MacroAssembler* assembler) |
| 89 | : variable_(&assembler->root_array_available_), |
| 90 | old_value_(assembler->root_array_available_) { |
| 91 | assembler->root_array_available_ = false; |
| 92 | } |
| 93 | ~NoRootArrayScope() { |
| 94 | *variable_ = old_value_; |
| 95 | } |
| 96 | private: |
| 97 | bool* variable_; |
| 98 | bool old_value_; |
| 99 | }; |
| 100 | |
| 101 | // Operand pointing to an external reference. |
| 102 | // May emit code to set up the scratch register. The operand is |
| 103 | // only guaranteed to be correct as long as the scratch register |
| 104 | // isn't changed. |
| 105 | // If the operand is used more than once, use a scratch register |
| 106 | // that is guaranteed not to be clobbered. |
| 107 | Operand ExternalOperand(ExternalReference reference, |
| 108 | Register scratch = kScratchRegister); |
| 109 | // Loads and stores the value of an external reference. |
| 110 | // Special case code for load and store to take advantage of |
| 111 | // load_rax/store_rax if possible/necessary. |
| 112 | // For other operations, just use: |
| 113 | // Operand operand = ExternalOperand(extref); |
| 114 | // operation(operand, ..); |
| 115 | void Load(Register destination, ExternalReference source); |
| 116 | void Store(ExternalReference destination, Register source); |
| 117 | // Loads the address of the external reference into the destination |
| 118 | // register. |
| 119 | void LoadAddress(Register destination, ExternalReference source); |
| 120 | // Returns the size of the code generated by LoadAddress. |
| 121 | // Used by CallSize(ExternalReference) to find the size of a call. |
| 122 | int LoadAddressSize(ExternalReference source); |
| 123 | |
| 124 | // Operations on roots in the root-array. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 125 | void LoadRoot(Register destination, Heap::RootListIndex index); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 126 | void StoreRoot(Register source, Heap::RootListIndex index); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 127 | // Load a root value where the index (or part of it) is variable. |
| 128 | // The variable_offset register is added to the fixed_offset value |
| 129 | // to get the index into the root-array. |
| 130 | void LoadRootIndexed(Register destination, |
| 131 | Register variable_offset, |
| 132 | int fixed_offset); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 133 | void CompareRoot(Register with, Heap::RootListIndex index); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 134 | void CompareRoot(const Operand& with, Heap::RootListIndex index); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 135 | void PushRoot(Heap::RootListIndex index); |
| 136 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 137 | // --------------------------------------------------------------------------- |
| 138 | // GC Support |
| 139 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 140 | // For page containing |object| mark region covering |addr| dirty. |
| 141 | // RecordWriteHelper only works if the object is not in new |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 142 | // space. |
| 143 | void RecordWriteHelper(Register object, |
| 144 | Register addr, |
| 145 | Register scratch); |
| 146 | |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 147 | // Check if object is in new space. The condition cc can be equal or |
| 148 | // not_equal. If it is equal a jump will be done if the object is on new |
| 149 | // space. The register scratch can be object itself, but it will be clobbered. |
| 150 | void InNewSpace(Register object, |
| 151 | Register scratch, |
| 152 | Condition cc, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 153 | Label* branch, |
| 154 | Label::Distance near_jump = Label::kFar); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 155 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 156 | // For page containing |object| mark region covering [object+offset] |
| 157 | // dirty. |object| is the object being stored into, |value| is the |
| 158 | // object being stored. If |offset| is zero, then the |scratch| |
| 159 | // register contains the array index into the elements array |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 160 | // represented as an untagged 32-bit integer. All registers are |
| 161 | // clobbered by the operation. RecordWrite filters out smis so it |
| 162 | // does not update the write barrier if the value is a smi. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 163 | void RecordWrite(Register object, |
| 164 | int offset, |
| 165 | Register value, |
| 166 | Register scratch); |
| 167 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 168 | // For page containing |object| mark region covering [address] |
| 169 | // dirty. |object| is the object being stored into, |value| is the |
| 170 | // object being stored. All registers are clobbered by the |
| 171 | // operation. RecordWrite filters out smis so it does not update |
| 172 | // the write barrier if the value is a smi. |
| 173 | void RecordWrite(Register object, |
| 174 | Register address, |
| 175 | Register value); |
| 176 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 177 | // For page containing |object| mark region covering [object+offset] dirty. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 178 | // The value is known to not be a smi. |
| 179 | // object is the object being stored into, value is the object being stored. |
| 180 | // If offset is zero, then the scratch register contains the array index into |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 181 | // the elements array represented as an untagged 32-bit integer. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 182 | // All registers are clobbered by the operation. |
| 183 | void RecordWriteNonSmi(Register object, |
| 184 | int offset, |
| 185 | Register value, |
| 186 | Register scratch); |
| 187 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 188 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 189 | // --------------------------------------------------------------------------- |
| 190 | // Debugger Support |
| 191 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 192 | void DebugBreak(); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 193 | #endif |
| 194 | |
| 195 | // --------------------------------------------------------------------------- |
| 196 | // Activation frames |
| 197 | |
| 198 | void EnterInternalFrame() { EnterFrame(StackFrame::INTERNAL); } |
| 199 | void LeaveInternalFrame() { LeaveFrame(StackFrame::INTERNAL); } |
| 200 | |
| 201 | void EnterConstructFrame() { EnterFrame(StackFrame::CONSTRUCT); } |
| 202 | void LeaveConstructFrame() { LeaveFrame(StackFrame::CONSTRUCT); } |
| 203 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 204 | // Enter specific kind of exit frame; either in normal or |
| 205 | // debug mode. Expects the number of arguments in register rax and |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 206 | // sets up the number of arguments in register rdi and the pointer |
| 207 | // to the first argument in register rsi. |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 208 | // |
| 209 | // Allocates arg_stack_space * kPointerSize memory (not GCed) on the stack |
| 210 | // accessible via StackSpaceOperand. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 211 | void EnterExitFrame(int arg_stack_space = 0, bool save_doubles = false); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 212 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 213 | // Enter specific kind of exit frame. Allocates arg_stack_space * kPointerSize |
| 214 | // memory (not GCed) on the stack accessible via StackSpaceOperand. |
| 215 | void EnterApiExitFrame(int arg_stack_space); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 216 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 217 | // Leave the current exit frame. Expects/provides the return value in |
| 218 | // register rax:rdx (untouched) and the pointer to the first |
| 219 | // argument in register rsi. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 220 | void LeaveExitFrame(bool save_doubles = false); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 221 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 222 | // Leave the current exit frame. Expects/provides the return value in |
| 223 | // register rax (untouched). |
| 224 | void LeaveApiExitFrame(); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 225 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 226 | // Push and pop the registers that can hold pointers. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 227 | void PushSafepointRegisters() { Pushad(); } |
| 228 | void PopSafepointRegisters() { Popad(); } |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 229 | // Store the value in register src in the safepoint register stack |
| 230 | // slot for register dst. |
| 231 | void StoreToSafepointRegisterSlot(Register dst, Register src); |
vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 232 | void LoadFromSafepointRegisterSlot(Register dst, Register src); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 233 | |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 234 | void InitializeRootRegister() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 235 | ExternalReference roots_address = |
| 236 | ExternalReference::roots_address(isolate()); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 237 | movq(kRootRegister, roots_address); |
| 238 | addq(kRootRegister, Immediate(kRootRegisterBias)); |
| 239 | } |
| 240 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 241 | // --------------------------------------------------------------------------- |
| 242 | // JavaScript invokes |
| 243 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame^] | 244 | // Setup call kind marking in rcx. The method takes rcx as an |
| 245 | // explicit first parameter to make the code more readable at the |
| 246 | // call sites. |
| 247 | void SetCallKind(Register dst, CallKind kind); |
| 248 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 249 | // Invoke the JavaScript function code by either calling or jumping. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 250 | void InvokeCode(Register code, |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 251 | const ParameterCount& expected, |
| 252 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 253 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame^] | 254 | const CallWrapper& call_wrapper = NullCallWrapper(), |
| 255 | CallKind call_kind = CALL_AS_METHOD); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 256 | |
| 257 | void InvokeCode(Handle<Code> code, |
| 258 | const ParameterCount& expected, |
| 259 | const ParameterCount& actual, |
| 260 | RelocInfo::Mode rmode, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 261 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame^] | 262 | const CallWrapper& call_wrapper = NullCallWrapper(), |
| 263 | CallKind call_kind = CALL_AS_METHOD); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 264 | |
| 265 | // Invoke the JavaScript function in the given register. Changes the |
| 266 | // current context to the context in the function before invoking. |
| 267 | void InvokeFunction(Register function, |
| 268 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 269 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame^] | 270 | const CallWrapper& call_wrapper = NullCallWrapper(), |
| 271 | CallKind call_kind = CALL_AS_METHOD); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 272 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 273 | void InvokeFunction(JSFunction* function, |
| 274 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 275 | InvokeFlag flag, |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 276 | const CallWrapper& call_wrapper = NullCallWrapper()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 277 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 278 | // Invoke specified builtin JavaScript function. Adds an entry to |
| 279 | // the unresolved list if the name does not resolve. |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 280 | void InvokeBuiltin(Builtins::JavaScript id, |
| 281 | InvokeFlag flag, |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 282 | const CallWrapper& call_wrapper = NullCallWrapper()); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 283 | |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 284 | // Store the function for the given builtin in the target register. |
| 285 | void GetBuiltinFunction(Register target, Builtins::JavaScript id); |
| 286 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 287 | // Store the code object for the given builtin in the target register. |
| 288 | void GetBuiltinEntry(Register target, Builtins::JavaScript id); |
| 289 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 290 | |
| 291 | // --------------------------------------------------------------------------- |
| 292 | // Smi tagging, untagging and operations on tagged smis. |
| 293 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 294 | void InitializeSmiConstantRegister() { |
| 295 | movq(kSmiConstantRegister, |
| 296 | reinterpret_cast<uint64_t>(Smi::FromInt(kSmiConstantRegisterValue)), |
| 297 | RelocInfo::NONE); |
| 298 | } |
| 299 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 300 | // Conversions between tagged smi values and non-tagged integer values. |
| 301 | |
| 302 | // Tag an integer value. The result must be known to be a valid smi value. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 303 | // Only uses the low 32 bits of the src register. Sets the N and Z flags |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 304 | // based on the value of the resulting smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 305 | void Integer32ToSmi(Register dst, Register src); |
| 306 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 307 | // Stores an integer32 value into a memory field that already holds a smi. |
| 308 | void Integer32ToSmiField(const Operand& dst, Register src); |
| 309 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 310 | // Adds constant to src and tags the result as a smi. |
| 311 | // Result must be a valid smi. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 312 | void Integer64PlusConstantToSmi(Register dst, Register src, int constant); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 313 | |
| 314 | // Convert smi to 32-bit integer. I.e., not sign extended into |
| 315 | // high 32 bits of destination. |
| 316 | void SmiToInteger32(Register dst, Register src); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 317 | void SmiToInteger32(Register dst, const Operand& src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 318 | |
| 319 | // Convert smi to 64-bit integer (sign extended if necessary). |
| 320 | void SmiToInteger64(Register dst, Register src); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 321 | void SmiToInteger64(Register dst, const Operand& src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 322 | |
| 323 | // Multiply a positive smi's integer value by a power of two. |
| 324 | // Provides result as 64-bit integer value. |
| 325 | void PositiveSmiTimesPowerOfTwoToInteger64(Register dst, |
| 326 | Register src, |
| 327 | int power); |
| 328 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 329 | // Divide a positive smi's integer value by a power of two. |
| 330 | // Provides result as 32-bit integer value. |
| 331 | void PositiveSmiDivPowerOfTwoToInteger32(Register dst, |
| 332 | Register src, |
| 333 | int power); |
| 334 | |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 335 | // Perform the logical or of two smi values and return a smi value. |
| 336 | // If either argument is not a smi, jump to on_not_smis and retain |
| 337 | // the original values of source registers. The destination register |
| 338 | // may be changed if it's not one of the source registers. |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 339 | void SmiOrIfSmis(Register dst, |
| 340 | Register src1, |
| 341 | Register src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 342 | Label* on_not_smis, |
| 343 | Label::Distance near_jump = Label::kFar); |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 344 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 345 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 346 | // Simple comparison of smis. Both sides must be known smis to use these, |
| 347 | // otherwise use Cmp. |
| 348 | void SmiCompare(Register smi1, Register smi2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 349 | void SmiCompare(Register dst, Smi* src); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 350 | void SmiCompare(Register dst, const Operand& src); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 351 | void SmiCompare(const Operand& dst, Register src); |
| 352 | void SmiCompare(const Operand& dst, Smi* src); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 353 | // Compare the int32 in src register to the value of the smi stored at dst. |
| 354 | void SmiCompareInteger32(const Operand& dst, Register src); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 355 | // Sets sign and zero flags depending on value of smi in register. |
| 356 | void SmiTest(Register src); |
| 357 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 358 | // Functions performing a check on a known or potential smi. Returns |
| 359 | // a condition that is satisfied if the check is successful. |
| 360 | |
| 361 | // Is the value a tagged smi. |
| 362 | Condition CheckSmi(Register src); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 363 | Condition CheckSmi(const Operand& src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 364 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 365 | // Is the value a non-negative tagged smi. |
| 366 | Condition CheckNonNegativeSmi(Register src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 367 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 368 | // Are both values tagged smis. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 369 | Condition CheckBothSmi(Register first, Register second); |
| 370 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 371 | // Are both values non-negative tagged smis. |
| 372 | Condition CheckBothNonNegativeSmi(Register first, Register second); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 373 | |
| 374 | // Are either value a tagged smi. |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 375 | Condition CheckEitherSmi(Register first, |
| 376 | Register second, |
| 377 | Register scratch = kScratchRegister); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 378 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 379 | // Is the value the minimum smi value (since we are using |
| 380 | // two's complement numbers, negating the value is known to yield |
| 381 | // a non-smi value). |
| 382 | Condition CheckIsMinSmi(Register src); |
| 383 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 384 | // Checks whether an 32-bit integer value is a valid for conversion |
| 385 | // to a smi. |
| 386 | Condition CheckInteger32ValidSmiValue(Register src); |
| 387 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 388 | // Checks whether an 32-bit unsigned integer value is a valid for |
| 389 | // conversion to a smi. |
| 390 | Condition CheckUInteger32ValidSmiValue(Register src); |
| 391 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 392 | // Check whether src is a Smi, and set dst to zero if it is a smi, |
| 393 | // and to one if it isn't. |
| 394 | void CheckSmiToIndicator(Register dst, Register src); |
| 395 | void CheckSmiToIndicator(Register dst, const Operand& src); |
| 396 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 397 | // Test-and-jump functions. Typically combines a check function |
| 398 | // above with a conditional jump. |
| 399 | |
| 400 | // Jump if the value cannot be represented by a smi. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 401 | void JumpIfNotValidSmiValue(Register src, Label* on_invalid, |
| 402 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 403 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 404 | // Jump if the unsigned integer value cannot be represented by a smi. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 405 | void JumpIfUIntNotValidSmiValue(Register src, Label* on_invalid, |
| 406 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 407 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 408 | // Jump to label if the value is a tagged smi. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 409 | void JumpIfSmi(Register src, |
| 410 | Label* on_smi, |
| 411 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 412 | |
| 413 | // Jump to label if the value is not a tagged smi. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 414 | void JumpIfNotSmi(Register src, |
| 415 | Label* on_not_smi, |
| 416 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 417 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 418 | // Jump to label if the value is not a non-negative tagged smi. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 419 | void JumpUnlessNonNegativeSmi(Register src, |
| 420 | Label* on_not_smi, |
| 421 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 422 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 423 | // Jump to label if the value, which must be a tagged smi, has value equal |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 424 | // to the constant. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 425 | void JumpIfSmiEqualsConstant(Register src, |
| 426 | Smi* constant, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 427 | Label* on_equals, |
| 428 | Label::Distance near_jump = Label::kFar); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 429 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 430 | // Jump if either or both register are not smi values. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 431 | void JumpIfNotBothSmi(Register src1, |
| 432 | Register src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 433 | Label* on_not_both_smi, |
| 434 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 435 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 436 | // Jump if either or both register are not non-negative smi values. |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 437 | void JumpUnlessBothNonNegativeSmi(Register src1, Register src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 438 | Label* on_not_both_smi, |
| 439 | Label::Distance near_jump = Label::kFar); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 440 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 441 | // Operations on tagged smi values. |
| 442 | |
| 443 | // Smis represent a subset of integers. The subset is always equivalent to |
| 444 | // a two's complement interpretation of a fixed number of bits. |
| 445 | |
| 446 | // Optimistically adds an integer constant to a supposed smi. |
| 447 | // If the src is not a smi, or the result is not a smi, jump to |
| 448 | // the label. |
| 449 | void SmiTryAddConstant(Register dst, |
| 450 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 451 | Smi* constant, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 452 | Label* on_not_smi_result, |
| 453 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 454 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 455 | // Add an integer constant to a tagged smi, giving a tagged smi as result. |
| 456 | // No overflow testing on the result is done. |
| 457 | void SmiAddConstant(Register dst, Register src, Smi* constant); |
| 458 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 459 | // Add an integer constant to a tagged smi, giving a tagged smi as result. |
| 460 | // No overflow testing on the result is done. |
| 461 | void SmiAddConstant(const Operand& dst, Smi* constant); |
| 462 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 463 | // Add an integer constant to a tagged smi, giving a tagged smi as result, |
| 464 | // or jumping to a label if the result cannot be represented by a smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 465 | void SmiAddConstant(Register dst, |
| 466 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 467 | Smi* constant, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 468 | Label* on_not_smi_result, |
| 469 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 470 | |
| 471 | // Subtract an integer constant from a tagged smi, giving a tagged smi as |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 472 | // result. No testing on the result is done. Sets the N and Z flags |
| 473 | // based on the value of the resulting integer. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 474 | void SmiSubConstant(Register dst, Register src, Smi* constant); |
| 475 | |
| 476 | // Subtract an integer constant from a tagged smi, giving a tagged smi as |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 477 | // result, or jumping to a label if the result cannot be represented by a smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 478 | void SmiSubConstant(Register dst, |
| 479 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 480 | Smi* constant, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 481 | Label* on_not_smi_result, |
| 482 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 483 | |
| 484 | // Negating a smi can give a negative zero or too large positive value. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 485 | // NOTICE: This operation jumps on success, not failure! |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 486 | void SmiNeg(Register dst, |
| 487 | Register src, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 488 | Label* on_smi_result, |
| 489 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 490 | |
| 491 | // Adds smi values and return the result as a smi. |
| 492 | // If dst is src1, then src1 will be destroyed, even if |
| 493 | // the operation is unsuccessful. |
| 494 | void SmiAdd(Register dst, |
| 495 | Register src1, |
| 496 | Register src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 497 | Label* on_not_smi_result, |
| 498 | Label::Distance near_jump = Label::kFar); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 499 | void SmiAdd(Register dst, |
| 500 | Register src1, |
| 501 | const Operand& src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 502 | Label* on_not_smi_result, |
| 503 | Label::Distance near_jump = Label::kFar); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 504 | |
| 505 | void SmiAdd(Register dst, |
| 506 | Register src1, |
| 507 | Register src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 508 | |
| 509 | // Subtracts smi values and return the result as a smi. |
| 510 | // If dst is src1, then src1 will be destroyed, even if |
| 511 | // the operation is unsuccessful. |
| 512 | void SmiSub(Register dst, |
| 513 | Register src1, |
| 514 | Register src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 515 | Label* on_not_smi_result, |
| 516 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 517 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 518 | void SmiSub(Register dst, |
| 519 | Register src1, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 520 | Register src2); |
| 521 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 522 | void SmiSub(Register dst, |
| 523 | Register src1, |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 524 | const Operand& src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 525 | Label* on_not_smi_result, |
| 526 | Label::Distance near_jump = Label::kFar); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 527 | |
| 528 | void SmiSub(Register dst, |
| 529 | Register src1, |
| 530 | const Operand& src2); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 531 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 532 | // Multiplies smi values and return the result as a smi, |
| 533 | // if possible. |
| 534 | // If dst is src1, then src1 will be destroyed, even if |
| 535 | // the operation is unsuccessful. |
| 536 | void SmiMul(Register dst, |
| 537 | Register src1, |
| 538 | Register src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 539 | Label* on_not_smi_result, |
| 540 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 541 | |
| 542 | // Divides one smi by another and returns the quotient. |
| 543 | // Clobbers rax and rdx registers. |
| 544 | void SmiDiv(Register dst, |
| 545 | Register src1, |
| 546 | Register src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 547 | Label* on_not_smi_result, |
| 548 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 549 | |
| 550 | // Divides one smi by another and returns the remainder. |
| 551 | // Clobbers rax and rdx registers. |
| 552 | void SmiMod(Register dst, |
| 553 | Register src1, |
| 554 | Register src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 555 | Label* on_not_smi_result, |
| 556 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 557 | |
| 558 | // Bitwise operations. |
| 559 | void SmiNot(Register dst, Register src); |
| 560 | void SmiAnd(Register dst, Register src1, Register src2); |
| 561 | void SmiOr(Register dst, Register src1, Register src2); |
| 562 | void SmiXor(Register dst, Register src1, Register src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 563 | void SmiAndConstant(Register dst, Register src1, Smi* constant); |
| 564 | void SmiOrConstant(Register dst, Register src1, Smi* constant); |
| 565 | void SmiXorConstant(Register dst, Register src1, Smi* constant); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 566 | |
| 567 | void SmiShiftLeftConstant(Register dst, |
| 568 | Register src, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 569 | int shift_value); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 570 | void SmiShiftLogicalRightConstant(Register dst, |
| 571 | Register src, |
| 572 | int shift_value, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 573 | Label* on_not_smi_result, |
| 574 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 575 | void SmiShiftArithmeticRightConstant(Register dst, |
| 576 | Register src, |
| 577 | int shift_value); |
| 578 | |
| 579 | // Shifts a smi value to the left, and returns the result if that is a smi. |
| 580 | // Uses and clobbers rcx, so dst may not be rcx. |
| 581 | void SmiShiftLeft(Register dst, |
| 582 | Register src1, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 583 | Register src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 584 | // Shifts a smi value to the right, shifting in zero bits at the top, and |
| 585 | // returns the unsigned intepretation of the result if that is a smi. |
| 586 | // Uses and clobbers rcx, so dst may not be rcx. |
| 587 | void SmiShiftLogicalRight(Register dst, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 588 | Register src1, |
| 589 | Register src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 590 | Label* on_not_smi_result, |
| 591 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 592 | // Shifts a smi value to the right, sign extending the top, and |
| 593 | // returns the signed intepretation of the result. That will always |
| 594 | // be a valid smi value, since it's numerically smaller than the |
| 595 | // original. |
| 596 | // Uses and clobbers rcx, so dst may not be rcx. |
| 597 | void SmiShiftArithmeticRight(Register dst, |
| 598 | Register src1, |
| 599 | Register src2); |
| 600 | |
| 601 | // Specialized operations |
| 602 | |
| 603 | // Select the non-smi register of two registers where exactly one is a |
| 604 | // smi. If neither are smis, jump to the failure label. |
| 605 | void SelectNonSmi(Register dst, |
| 606 | Register src1, |
| 607 | Register src2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 608 | Label* on_not_smis, |
| 609 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 610 | |
| 611 | // Converts, if necessary, a smi to a combination of number and |
| 612 | // multiplier to be used as a scaled index. |
| 613 | // The src register contains a *positive* smi value. The shift is the |
| 614 | // power of two to multiply the index value by (e.g. |
| 615 | // to index by smi-value * kPointerSize, pass the smi and kPointerSizeLog2). |
| 616 | // The returned index register may be either src or dst, depending |
| 617 | // on what is most efficient. If src and dst are different registers, |
| 618 | // src is always unchanged. |
| 619 | SmiIndex SmiToIndex(Register dst, Register src, int shift); |
| 620 | |
| 621 | // Converts a positive smi to a negative index. |
| 622 | SmiIndex SmiToNegativeIndex(Register dst, Register src, int shift); |
| 623 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 624 | // Add the value of a smi in memory to an int32 register. |
| 625 | // Sets flags as a normal add. |
| 626 | void AddSmiField(Register dst, const Operand& src); |
| 627 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 628 | // Basic Smi operations. |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 629 | void Move(Register dst, Smi* source) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 630 | LoadSmiConstant(dst, source); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 631 | } |
| 632 | |
| 633 | void Move(const Operand& dst, Smi* source) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 634 | Register constant = GetSmiConstant(source); |
| 635 | movq(dst, constant); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 636 | } |
| 637 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 638 | void Push(Smi* smi); |
| 639 | void Test(const Operand& dst, Smi* source); |
| 640 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 641 | // --------------------------------------------------------------------------- |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 642 | // String macros. |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 643 | |
| 644 | // If object is a string, its map is loaded into object_map. |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 645 | void JumpIfNotString(Register object, |
| 646 | Register object_map, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 647 | Label* not_string, |
| 648 | Label::Distance near_jump = Label::kFar); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 649 | |
| 650 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 651 | void JumpIfNotBothSequentialAsciiStrings( |
| 652 | Register first_object, |
| 653 | Register second_object, |
| 654 | Register scratch1, |
| 655 | Register scratch2, |
| 656 | Label* on_not_both_flat_ascii, |
| 657 | Label::Distance near_jump = Label::kFar); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 658 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 659 | // Check whether the instance type represents a flat ascii string. Jump to the |
| 660 | // label if not. If the instance type can be scratched specify same register |
| 661 | // for both instance type and scratch. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 662 | void JumpIfInstanceTypeIsNotSequentialAscii( |
| 663 | Register instance_type, |
| 664 | Register scratch, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 665 | Label*on_not_flat_ascii_string, |
| 666 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 667 | |
| 668 | void JumpIfBothInstanceTypesAreNotSequentialAscii( |
| 669 | Register first_object_instance_type, |
| 670 | Register second_object_instance_type, |
| 671 | Register scratch1, |
| 672 | Register scratch2, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 673 | Label* on_fail, |
| 674 | Label::Distance near_jump = Label::kFar); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 675 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 676 | // --------------------------------------------------------------------------- |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 677 | // Macro instructions. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 678 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 679 | // Load a register with a long value as efficiently as possible. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 680 | void Set(Register dst, int64_t x); |
| 681 | void Set(const Operand& dst, int64_t x); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 682 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 683 | // Move if the registers are not identical. |
| 684 | void Move(Register target, Register source); |
| 685 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 686 | // Handle support |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 687 | void Move(Register dst, Handle<Object> source); |
| 688 | void Move(const Operand& dst, Handle<Object> source); |
| 689 | void Cmp(Register dst, Handle<Object> source); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 690 | void Cmp(const Operand& dst, Handle<Object> source); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 691 | void Cmp(Register dst, Smi* src); |
| 692 | void Cmp(const Operand& dst, Smi* src); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 693 | void Push(Handle<Object> source); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 694 | |
| 695 | // Emit code to discard a non-negative number of pointer-sized elements |
| 696 | // from the stack, clobbering only the rsp register. |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 697 | void Drop(int stack_elements); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 698 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 699 | void Call(Label* target) { call(target); } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 700 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 701 | // Control Flow |
| 702 | void Jump(Address destination, RelocInfo::Mode rmode); |
| 703 | void Jump(ExternalReference ext); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 704 | void Jump(Handle<Code> code_object, RelocInfo::Mode rmode); |
| 705 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 706 | void Call(Address destination, RelocInfo::Mode rmode); |
| 707 | void Call(ExternalReference ext); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 708 | void Call(Handle<Code> code_object, |
| 709 | RelocInfo::Mode rmode, |
| 710 | unsigned ast_id = kNoASTId); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 711 | |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 712 | // The size of the code generated for different call instructions. |
| 713 | int CallSize(Address destination, RelocInfo::Mode rmode) { |
| 714 | return kCallInstructionLength; |
| 715 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 716 | int CallSize(ExternalReference ext); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 717 | int CallSize(Handle<Code> code_object) { |
| 718 | // Code calls use 32-bit relative addressing. |
| 719 | return kShortCallInstructionLength; |
| 720 | } |
| 721 | int CallSize(Register target) { |
| 722 | // Opcode: REX_opt FF /2 m64 |
| 723 | return (target.high_bit() != 0) ? 3 : 2; |
| 724 | } |
| 725 | int CallSize(const Operand& target) { |
| 726 | // Opcode: REX_opt FF /2 m64 |
| 727 | return (target.requires_rex() ? 2 : 1) + target.operand_size(); |
| 728 | } |
| 729 | |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 730 | // Emit call to the code we are currently generating. |
| 731 | void CallSelf() { |
| 732 | Handle<Code> self(reinterpret_cast<Code**>(CodeObject().location())); |
| 733 | Call(self, RelocInfo::CODE_TARGET); |
| 734 | } |
| 735 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 736 | // Non-x64 instructions. |
| 737 | // Push/pop all general purpose registers. |
| 738 | // Does not push rsp/rbp nor any of the assembler's special purpose registers |
| 739 | // (kScratchRegister, kSmiConstantRegister, kRootRegister). |
| 740 | void Pushad(); |
| 741 | void Popad(); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 742 | // Sets the stack as after performing Popad, without actually loading the |
| 743 | // registers. |
| 744 | void Dropad(); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 745 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 746 | // Compare object type for heap object. |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 747 | // Always use unsigned comparisons: above and below, not less and greater. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 748 | // Incoming register is heap_object and outgoing register is map. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 749 | // They may be the same register, and may be kScratchRegister. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 750 | void CmpObjectType(Register heap_object, InstanceType type, Register map); |
| 751 | |
| 752 | // Compare instance type for map. |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 753 | // Always use unsigned comparisons: above and below, not less and greater. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 754 | void CmpInstanceType(Register map, InstanceType type); |
| 755 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 756 | // Check if the map of an object is equal to a specified map and |
| 757 | // branch to label if not. Skip the smi check if not required |
| 758 | // (object is known to be a heap object) |
| 759 | void CheckMap(Register obj, |
| 760 | Handle<Map> map, |
| 761 | Label* fail, |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 762 | SmiCheckType smi_check_type); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 763 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 764 | // Check if the map of an object is equal to a specified map and branch to a |
| 765 | // specified target if equal. Skip the smi check if not required (object is |
| 766 | // known to be a heap object) |
| 767 | void DispatchMap(Register obj, |
| 768 | Handle<Map> map, |
| 769 | Handle<Code> success, |
| 770 | SmiCheckType smi_check_type); |
| 771 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 772 | // Check if the object in register heap_object is a string. Afterwards the |
| 773 | // register map contains the object map and the register instance_type |
| 774 | // contains the instance_type. The registers map and instance_type can be the |
| 775 | // same in which case it contains the instance type afterwards. Either of the |
| 776 | // registers map and instance_type can be the same as heap_object. |
| 777 | Condition IsObjectStringType(Register heap_object, |
| 778 | Register map, |
| 779 | Register instance_type); |
| 780 | |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 781 | // FCmp compares and pops the two values on top of the FPU stack. |
| 782 | // The flag results are similar to integer cmp, but requires unsigned |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 783 | // jcc instructions (je, ja, jae, jb, jbe, je, and jz). |
| 784 | void FCmp(); |
| 785 | |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 786 | void ClampUint8(Register reg); |
| 787 | |
| 788 | void ClampDoubleToUint8(XMMRegister input_reg, |
| 789 | XMMRegister temp_xmm_reg, |
| 790 | Register result_reg, |
| 791 | Register temp_reg); |
| 792 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame^] | 793 | void LoadInstanceDescriptors(Register map, Register descriptors); |
| 794 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 795 | // Abort execution if argument is not a number. Used in debug code. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 796 | void AbortIfNotNumber(Register object); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 797 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 798 | // Abort execution if argument is a smi. Used in debug code. |
| 799 | void AbortIfSmi(Register object); |
| 800 | |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 801 | // Abort execution if argument is not a smi. Used in debug code. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 802 | void AbortIfNotSmi(Register object); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 803 | void AbortIfNotSmi(const Operand& object); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 804 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 805 | // Abort execution if argument is a string. Used in debug code. |
| 806 | void AbortIfNotString(Register object); |
| 807 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 808 | // Abort execution if argument is not the root value with the given index. |
| 809 | void AbortIfNotRootValue(Register src, |
| 810 | Heap::RootListIndex root_value_index, |
| 811 | const char* message); |
| 812 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 813 | // --------------------------------------------------------------------------- |
| 814 | // Exception handling |
| 815 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 816 | // Push a new try handler and link into try handler chain. The return |
| 817 | // address must be pushed before calling this helper. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 818 | void PushTryHandler(CodeLocation try_location, HandlerType type); |
| 819 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 820 | // Unlink the stack handler on top of the stack from the try handler chain. |
| 821 | void PopTryHandler(); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 822 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 823 | // Activate the top handler in the try hander chain and pass the |
| 824 | // thrown value. |
| 825 | void Throw(Register value); |
| 826 | |
| 827 | // Propagate an uncatchable exception out of the current JS stack. |
| 828 | void ThrowUncatchable(UncatchableExceptionType type, Register value); |
| 829 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 830 | // --------------------------------------------------------------------------- |
| 831 | // Inline caching support |
| 832 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 833 | // Generate code for checking access rights - used for security checks |
| 834 | // on access to global objects across environments. The holder register |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 835 | // is left untouched, but the scratch register and kScratchRegister, |
| 836 | // which must be different, are clobbered. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 837 | void CheckAccessGlobalProxy(Register holder_reg, |
| 838 | Register scratch, |
| 839 | Label* miss); |
| 840 | |
| 841 | |
| 842 | // --------------------------------------------------------------------------- |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 843 | // Allocation support |
| 844 | |
| 845 | // Allocate an object in new space. If the new space is exhausted control |
| 846 | // continues at the gc_required label. The allocated object is returned in |
| 847 | // result and end of the new object is returned in result_end. The register |
| 848 | // scratch can be passed as no_reg in which case an additional object |
| 849 | // reference will be added to the reloc info. The returned pointers in result |
| 850 | // and result_end have not yet been tagged as heap objects. If |
| 851 | // result_contains_top_on_entry is true the content of result is known to be |
| 852 | // the allocation top on entry (could be result_end from a previous call to |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 853 | // AllocateInNewSpace). If result_contains_top_on_entry is true scratch |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 854 | // should be no_reg as it is never used. |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 855 | void AllocateInNewSpace(int object_size, |
| 856 | Register result, |
| 857 | Register result_end, |
| 858 | Register scratch, |
| 859 | Label* gc_required, |
| 860 | AllocationFlags flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 861 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 862 | void AllocateInNewSpace(int header_size, |
| 863 | ScaleFactor element_size, |
| 864 | Register element_count, |
| 865 | Register result, |
| 866 | Register result_end, |
| 867 | Register scratch, |
| 868 | Label* gc_required, |
| 869 | AllocationFlags flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 870 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 871 | void AllocateInNewSpace(Register object_size, |
| 872 | Register result, |
| 873 | Register result_end, |
| 874 | Register scratch, |
| 875 | Label* gc_required, |
| 876 | AllocationFlags flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 877 | |
| 878 | // Undo allocation in new space. The object passed and objects allocated after |
| 879 | // it will no longer be allocated. Make sure that no pointers are left to the |
| 880 | // object(s) no longer allocated as they would be invalid when allocation is |
| 881 | // un-done. |
| 882 | void UndoAllocationInNewSpace(Register object); |
| 883 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 884 | // Allocate a heap number in new space with undefined value. Returns |
| 885 | // tagged pointer in result register, or jumps to gc_required if new |
| 886 | // space is full. |
| 887 | void AllocateHeapNumber(Register result, |
| 888 | Register scratch, |
| 889 | Label* gc_required); |
| 890 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 891 | // Allocate a sequential string. All the header fields of the string object |
| 892 | // are initialized. |
| 893 | void AllocateTwoByteString(Register result, |
| 894 | Register length, |
| 895 | Register scratch1, |
| 896 | Register scratch2, |
| 897 | Register scratch3, |
| 898 | Label* gc_required); |
| 899 | void AllocateAsciiString(Register result, |
| 900 | Register length, |
| 901 | Register scratch1, |
| 902 | Register scratch2, |
| 903 | Register scratch3, |
| 904 | Label* gc_required); |
| 905 | |
| 906 | // Allocate a raw cons string object. Only the map field of the result is |
| 907 | // initialized. |
| 908 | void AllocateConsString(Register result, |
| 909 | Register scratch1, |
| 910 | Register scratch2, |
| 911 | Label* gc_required); |
| 912 | void AllocateAsciiConsString(Register result, |
| 913 | Register scratch1, |
| 914 | Register scratch2, |
| 915 | Label* gc_required); |
| 916 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 917 | // --------------------------------------------------------------------------- |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 918 | // Support functions. |
| 919 | |
| 920 | // Check if result is zero and op is negative. |
| 921 | void NegativeZeroTest(Register result, Register op, Label* then_label); |
| 922 | |
| 923 | // Check if result is zero and op is negative in code using jump targets. |
| 924 | void NegativeZeroTest(CodeGenerator* cgen, |
| 925 | Register result, |
| 926 | Register op, |
| 927 | JumpTarget* then_target); |
| 928 | |
| 929 | // Check if result is zero and any of op1 and op2 are negative. |
| 930 | // Register scratch is destroyed, and it must be different from op2. |
| 931 | void NegativeZeroTest(Register result, Register op1, Register op2, |
| 932 | Register scratch, Label* then_label); |
| 933 | |
| 934 | // Try to get function prototype of a function and puts the value in |
| 935 | // the result register. Checks that the function really is a |
| 936 | // function and jumps to the miss label if the fast checks fail. The |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 937 | // function register will be untouched; the other register may be |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 938 | // clobbered. |
| 939 | void TryGetFunctionPrototype(Register function, |
| 940 | Register result, |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 941 | Label* miss); |
| 942 | |
| 943 | // Generates code for reporting that an illegal operation has |
| 944 | // occurred. |
| 945 | void IllegalOperation(int num_arguments); |
| 946 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 947 | // Picks out an array index from the hash field. |
| 948 | // Register use: |
| 949 | // hash - holds the index's hash. Clobbered. |
| 950 | // index - holds the overwritten index on exit. |
| 951 | void IndexFromHash(Register hash, Register index); |
| 952 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 953 | // Find the function context up the context chain. |
| 954 | void LoadContext(Register dst, int context_chain_length); |
| 955 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 956 | // Load the global function with the given index. |
| 957 | void LoadGlobalFunction(int index, Register function); |
| 958 | |
| 959 | // Load the initial map from the global function. The registers |
| 960 | // function and map can be the same. |
| 961 | void LoadGlobalFunctionInitialMap(Register function, Register map); |
| 962 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 963 | // --------------------------------------------------------------------------- |
| 964 | // Runtime calls |
| 965 | |
| 966 | // Call a code stub. |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 967 | void CallStub(CodeStub* stub, unsigned ast_id = kNoASTId); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 968 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 969 | // Call a code stub and return the code object called. Try to generate |
| 970 | // the code if necessary. Do not perform a GC but instead return a retry |
| 971 | // after GC failure. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 972 | MUST_USE_RESULT MaybeObject* TryCallStub(CodeStub* stub); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 973 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 974 | // Tail call a code stub (jump). |
| 975 | void TailCallStub(CodeStub* stub); |
| 976 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 977 | // Tail call a code stub (jump) and return the code object called. Try to |
| 978 | // generate the code if necessary. Do not perform a GC but instead return |
| 979 | // a retry after GC failure. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 980 | MUST_USE_RESULT MaybeObject* TryTailCallStub(CodeStub* stub); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 981 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 982 | // Return from a code stub after popping its arguments. |
| 983 | void StubReturn(int argc); |
| 984 | |
| 985 | // Call a runtime routine. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 986 | void CallRuntime(const Runtime::Function* f, int num_arguments); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 987 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 988 | // Call a runtime function and save the value of XMM registers. |
| 989 | void CallRuntimeSaveDoubles(Runtime::FunctionId id); |
| 990 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 991 | // Call a runtime function, returning the CodeStub object called. |
| 992 | // Try to generate the stub code if necessary. Do not perform a GC |
| 993 | // but instead return a retry after GC failure. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 994 | MUST_USE_RESULT MaybeObject* TryCallRuntime(const Runtime::Function* f, |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 995 | int num_arguments); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 996 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 997 | // Convenience function: Same as above, but takes the fid instead. |
| 998 | void CallRuntime(Runtime::FunctionId id, int num_arguments); |
| 999 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 1000 | // Convenience function: Same as above, but takes the fid instead. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1001 | MUST_USE_RESULT MaybeObject* TryCallRuntime(Runtime::FunctionId id, |
| 1002 | int num_arguments); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 1003 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1004 | // Convenience function: call an external reference. |
| 1005 | void CallExternalReference(const ExternalReference& ext, |
| 1006 | int num_arguments); |
| 1007 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1008 | // Tail call of a runtime routine (jump). |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1009 | // Like JumpToExternalReference, but also takes care of passing the number |
| 1010 | // of parameters. |
| 1011 | void TailCallExternalReference(const ExternalReference& ext, |
| 1012 | int num_arguments, |
| 1013 | int result_size); |
| 1014 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1015 | MUST_USE_RESULT MaybeObject* TryTailCallExternalReference( |
| 1016 | const ExternalReference& ext, int num_arguments, int result_size); |
| 1017 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1018 | // Convenience function: tail call a runtime routine (jump). |
| 1019 | void TailCallRuntime(Runtime::FunctionId fid, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1020 | int num_arguments, |
| 1021 | int result_size); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1022 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1023 | MUST_USE_RESULT MaybeObject* TryTailCallRuntime(Runtime::FunctionId fid, |
| 1024 | int num_arguments, |
| 1025 | int result_size); |
| 1026 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1027 | // Jump to a runtime routine. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1028 | void JumpToExternalReference(const ExternalReference& ext, int result_size); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1029 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1030 | // Jump to a runtime routine. |
| 1031 | MaybeObject* TryJumpToExternalReference(const ExternalReference& ext, |
| 1032 | int result_size); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1033 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1034 | // Prepares stack to put arguments (aligns and so on). |
| 1035 | // WIN64 calling convention requires to put the pointer to the return value |
| 1036 | // slot into rcx (rcx must be preserverd until TryCallApiFunctionAndReturn). |
| 1037 | // Saves context (rsi). Clobbers rax. Allocates arg_stack_space * kPointerSize |
| 1038 | // inside the exit frame (not GCed) accessible via StackSpaceOperand. |
| 1039 | void PrepareCallApiFunction(int arg_stack_space); |
| 1040 | |
| 1041 | // Calls an API function. Allocates HandleScope, extracts |
| 1042 | // returned value from handle and propagates exceptions. |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 1043 | // Clobbers r14, r15, rbx and caller-save registers. Restores context. |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1044 | // On return removes stack_space * kPointerSize (GCed). |
| 1045 | MUST_USE_RESULT MaybeObject* TryCallApiFunctionAndReturn( |
| 1046 | ApiFunction* function, int stack_space); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1047 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1048 | // Before calling a C-function from generated code, align arguments on stack. |
| 1049 | // After aligning the frame, arguments must be stored in esp[0], esp[4], |
| 1050 | // etc., not pushed. The argument count assumes all arguments are word sized. |
| 1051 | // The number of slots reserved for arguments depends on platform. On Windows |
| 1052 | // stack slots are reserved for the arguments passed in registers. On other |
| 1053 | // platforms stack slots are only reserved for the arguments actually passed |
| 1054 | // on the stack. |
| 1055 | void PrepareCallCFunction(int num_arguments); |
| 1056 | |
| 1057 | // Calls a C function and cleans up the space for arguments allocated |
| 1058 | // by PrepareCallCFunction. The called function is not allowed to trigger a |
| 1059 | // garbage collection, since that might move the code and invalidate the |
| 1060 | // return address (unless this is somehow accounted for by the called |
| 1061 | // function). |
| 1062 | void CallCFunction(ExternalReference function, int num_arguments); |
| 1063 | void CallCFunction(Register function, int num_arguments); |
| 1064 | |
| 1065 | // Calculate the number of stack slots to reserve for arguments when calling a |
| 1066 | // C function. |
| 1067 | int ArgumentStackSlotsForCFunctionCall(int num_arguments); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1068 | |
| 1069 | // --------------------------------------------------------------------------- |
| 1070 | // Utilities |
| 1071 | |
| 1072 | void Ret(); |
| 1073 | |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 1074 | // Return and drop arguments from stack, where the number of arguments |
| 1075 | // may be bigger than 2^16 - 1. Requires a scratch register. |
| 1076 | void Ret(int bytes_dropped, Register scratch); |
| 1077 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 1078 | Handle<Object> CodeObject() { |
| 1079 | ASSERT(!code_object_.is_null()); |
| 1080 | return code_object_; |
| 1081 | } |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1082 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1083 | // Copy length bytes from source to destination. |
| 1084 | // Uses scratch register internally (if you have a low-eight register |
| 1085 | // free, do use it, otherwise kScratchRegister will be used). |
| 1086 | // The min_length is a minimum limit on the value that length will have. |
| 1087 | // The algorithm has some special cases that might be omitted if the string |
| 1088 | // is known to always be long. |
| 1089 | void CopyBytes(Register destination, |
| 1090 | Register source, |
| 1091 | Register length, |
| 1092 | int min_length = 0, |
| 1093 | Register scratch = kScratchRegister); |
| 1094 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1095 | |
| 1096 | // --------------------------------------------------------------------------- |
| 1097 | // StatsCounter support |
| 1098 | |
| 1099 | void SetCounter(StatsCounter* counter, int value); |
| 1100 | void IncrementCounter(StatsCounter* counter, int value); |
| 1101 | void DecrementCounter(StatsCounter* counter, int value); |
| 1102 | |
| 1103 | |
| 1104 | // --------------------------------------------------------------------------- |
| 1105 | // Debugging |
| 1106 | |
| 1107 | // Calls Abort(msg) if the condition cc is not satisfied. |
| 1108 | // Use --debug_code to enable. |
| 1109 | void Assert(Condition cc, const char* msg); |
| 1110 | |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 1111 | void AssertFastElements(Register elements); |
| 1112 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1113 | // Like Assert(), but always enabled. |
| 1114 | void Check(Condition cc, const char* msg); |
| 1115 | |
| 1116 | // Print a message to stdout and abort execution. |
| 1117 | void Abort(const char* msg); |
| 1118 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 1119 | // Check that the stack is aligned. |
| 1120 | void CheckStackAlignment(); |
| 1121 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1122 | // Verify restrictions about code generated in stubs. |
| 1123 | void set_generating_stub(bool value) { generating_stub_ = value; } |
| 1124 | bool generating_stub() { return generating_stub_; } |
| 1125 | void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; } |
| 1126 | bool allow_stub_calls() { return allow_stub_calls_; } |
| 1127 | |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 1128 | static int SafepointRegisterStackIndex(Register reg) { |
| 1129 | return SafepointRegisterStackIndex(reg.code()); |
| 1130 | } |
| 1131 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1132 | private: |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1133 | // Order general registers are pushed by Pushad. |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 1134 | // rax, rcx, rdx, rbx, rsi, rdi, r8, r9, r11, r14, r15. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1135 | static int kSafepointPushRegisterIndices[Register::kNumRegisters]; |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 1136 | static const int kNumSafepointSavedRegisters = 11; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1137 | static const int kSmiShift = kSmiTagSize + kSmiShiftSize; |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 1138 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1139 | bool generating_stub_; |
| 1140 | bool allow_stub_calls_; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1141 | bool root_array_available_; |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1142 | |
| 1143 | // Returns a register holding the smi value. The register MUST NOT be |
| 1144 | // modified. It may be the "smi 1 constant" register. |
| 1145 | Register GetSmiConstant(Smi* value); |
| 1146 | |
| 1147 | // Moves the smi value to the destination register. |
| 1148 | void LoadSmiConstant(Register dst, Smi* value); |
| 1149 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1150 | // This handle will be patched with the code object on installation. |
| 1151 | Handle<Object> code_object_; |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1152 | |
| 1153 | // Helper functions for generating invokes. |
| 1154 | void InvokePrologue(const ParameterCount& expected, |
| 1155 | const ParameterCount& actual, |
| 1156 | Handle<Code> code_constant, |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1157 | Register code_register, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1158 | Label* done, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 1159 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame^] | 1160 | Label::Distance near_jump = Label::kFar, |
| 1161 | const CallWrapper& call_wrapper = NullCallWrapper(), |
| 1162 | CallKind call_kind = CALL_AS_METHOD); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1163 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1164 | // Activation support. |
| 1165 | void EnterFrame(StackFrame::Type type); |
| 1166 | void LeaveFrame(StackFrame::Type type); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1167 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 1168 | void EnterExitFramePrologue(bool save_rax); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1169 | |
| 1170 | // Allocates arg_stack_space * kPointerSize memory (not GCed) on the stack |
| 1171 | // accessible via StackSpaceOperand. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1172 | void EnterExitFrameEpilogue(int arg_stack_space, bool save_doubles); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1173 | |
| 1174 | void LeaveExitFrameEpilogue(); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 1175 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1176 | // Allocation support helpers. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1177 | // Loads the top of new-space into the result register. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1178 | // Otherwise the address of the new-space top is loaded into scratch (if |
| 1179 | // scratch is valid), and the new-space top is loaded into result. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1180 | void LoadAllocationTopHelper(Register result, |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1181 | Register scratch, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1182 | AllocationFlags flags); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1183 | // Update allocation top with value in result_end register. |
| 1184 | // If scratch is valid, it contains the address of the allocation top. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1185 | void UpdateAllocationTopHelper(Register result_end, Register scratch); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 1186 | |
| 1187 | // Helper for PopHandleScope. Allowed to perform a GC and returns |
| 1188 | // NULL if gc_allowed. Does not perform a GC if !gc_allowed, and |
| 1189 | // possibly returns a failure object indicating an allocation failure. |
| 1190 | Object* PopHandleScopeHelper(Register saved, |
| 1191 | Register scratch, |
| 1192 | bool gc_allowed); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 1193 | |
| 1194 | |
| 1195 | // Compute memory operands for safepoint stack slots. |
| 1196 | Operand SafepointRegisterSlot(Register reg); |
| 1197 | static int SafepointRegisterStackIndex(int reg_code) { |
| 1198 | return kNumSafepointRegisters - kSafepointPushRegisterIndices[reg_code] - 1; |
| 1199 | } |
| 1200 | |
| 1201 | // Needs access to SafepointRegisterStackIndex for optimized frame |
| 1202 | // traversal. |
| 1203 | friend class OptimizedFrame; |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1204 | }; |
| 1205 | |
| 1206 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1207 | // The code patcher is used to patch (typically) small parts of code e.g. for |
| 1208 | // debugging and other types of instrumentation. When using the code patcher |
| 1209 | // the exact number of bytes specified must be emitted. Is not legal to emit |
| 1210 | // relocation information. If any of these constraints are violated it causes |
| 1211 | // an assertion. |
| 1212 | class CodePatcher { |
| 1213 | public: |
| 1214 | CodePatcher(byte* address, int size); |
| 1215 | virtual ~CodePatcher(); |
| 1216 | |
| 1217 | // Macro assembler to emit code. |
| 1218 | MacroAssembler* masm() { return &masm_; } |
| 1219 | |
| 1220 | private: |
| 1221 | byte* address_; // The address of the code being patched. |
| 1222 | int size_; // Number of bytes of the expected patch size. |
| 1223 | MacroAssembler masm_; // Macro assembler used to generate the code. |
| 1224 | }; |
| 1225 | |
| 1226 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1227 | // ----------------------------------------------------------------------------- |
| 1228 | // Static helper functions. |
| 1229 | |
| 1230 | // Generate an Operand for loading a field from an object. |
| 1231 | static inline Operand FieldOperand(Register object, int offset) { |
| 1232 | return Operand(object, offset - kHeapObjectTag); |
| 1233 | } |
| 1234 | |
| 1235 | |
| 1236 | // Generate an Operand for loading an indexed field from an object. |
| 1237 | static inline Operand FieldOperand(Register object, |
| 1238 | Register index, |
| 1239 | ScaleFactor scale, |
| 1240 | int offset) { |
| 1241 | return Operand(object, index, scale, offset - kHeapObjectTag); |
| 1242 | } |
| 1243 | |
| 1244 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1245 | static inline Operand ContextOperand(Register context, int index) { |
| 1246 | return Operand(context, Context::SlotOffset(index)); |
| 1247 | } |
| 1248 | |
| 1249 | |
| 1250 | static inline Operand GlobalObjectOperand() { |
| 1251 | return ContextOperand(rsi, Context::GLOBAL_INDEX); |
| 1252 | } |
| 1253 | |
| 1254 | |
| 1255 | // Provides access to exit frame stack space (not GCed). |
| 1256 | static inline Operand StackSpaceOperand(int index) { |
| 1257 | #ifdef _WIN64 |
| 1258 | const int kShaddowSpace = 4; |
| 1259 | return Operand(rsp, (index + kShaddowSpace) * kPointerSize); |
| 1260 | #else |
| 1261 | return Operand(rsp, index * kPointerSize); |
| 1262 | #endif |
| 1263 | } |
| 1264 | |
| 1265 | |
| 1266 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1267 | #ifdef GENERATED_CODE_COVERAGE |
| 1268 | extern void LogGeneratedCodeCoverage(const char* file_line); |
| 1269 | #define CODE_COVERAGE_STRINGIFY(x) #x |
| 1270 | #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x) |
| 1271 | #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__) |
| 1272 | #define ACCESS_MASM(masm) { \ |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1273 | byte* x64_coverage_function = \ |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1274 | reinterpret_cast<byte*>(FUNCTION_ADDR(LogGeneratedCodeCoverage)); \ |
| 1275 | masm->pushfd(); \ |
| 1276 | masm->pushad(); \ |
| 1277 | masm->push(Immediate(reinterpret_cast<int>(&__FILE_LINE__))); \ |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1278 | masm->call(x64_coverage_function, RelocInfo::RUNTIME_ENTRY); \ |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1279 | masm->pop(rax); \ |
| 1280 | masm->popad(); \ |
| 1281 | masm->popfd(); \ |
| 1282 | } \ |
| 1283 | masm-> |
| 1284 | #else |
| 1285 | #define ACCESS_MASM(masm) masm-> |
| 1286 | #endif |
| 1287 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1288 | } } // namespace v8::internal |
| 1289 | |
| 1290 | #endif // V8_X64_MACRO_ASSEMBLER_X64_H_ |