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" |
| 32 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 33 | namespace v8 { |
| 34 | namespace internal { |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 35 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 36 | // Flags used for the AllocateInNewSpace functions. |
| 37 | enum AllocationFlags { |
| 38 | // No special flags. |
| 39 | NO_ALLOCATION_FLAGS = 0, |
| 40 | // Return the pointer to the allocated already tagged as a heap object. |
| 41 | TAG_OBJECT = 1 << 0, |
| 42 | // The content of the result register already contains the allocation top in |
| 43 | // new space. |
| 44 | RESULT_CONTAINS_TOP = 1 << 1 |
| 45 | }; |
| 46 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 47 | // Default scratch register used by MacroAssembler (and other code that needs |
| 48 | // a spare register). The register isn't callee save, and not used by the |
| 49 | // function calling convention. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 50 | static const Register kScratchRegister = { 10 }; // r10. |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 51 | static const Register kSmiConstantRegister = { 12 }; // r12 (callee save). |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 52 | static const Register kRootRegister = { 13 }; // r13 (callee save). |
| 53 | // Value of smi in kSmiConstantRegister. |
| 54 | static const int kSmiConstantRegisterValue = 1; |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 55 | // Actual value of root register is offset from the root array's start |
| 56 | // to take advantage of negitive 8-bit displacement values. |
| 57 | static const int kRootRegisterBias = 128; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 58 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 59 | // Convenience for platform-independent signatures. |
| 60 | typedef Operand MemOperand; |
| 61 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 62 | // Forward declaration. |
| 63 | class JumpTarget; |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 64 | class CallWrapper; |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 65 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 66 | struct SmiIndex { |
| 67 | SmiIndex(Register index_register, ScaleFactor scale) |
| 68 | : reg(index_register), |
| 69 | scale(scale) {} |
| 70 | Register reg; |
| 71 | ScaleFactor scale; |
| 72 | }; |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 73 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 74 | // MacroAssembler implements a collection of frequently used macros. |
| 75 | class MacroAssembler: public Assembler { |
| 76 | public: |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 77 | // The isolate parameter can be NULL if the macro assembler should |
| 78 | // not use isolate-dependent functionality. In this case, it's the |
| 79 | // responsibility of the caller to never invoke such function on the |
| 80 | // macro assembler. |
| 81 | MacroAssembler(Isolate* isolate, void* buffer, int size); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 82 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 83 | // Prevent the use of the RootArray during the lifetime of this |
| 84 | // scope object. |
| 85 | class NoRootArrayScope BASE_EMBEDDED { |
| 86 | public: |
| 87 | explicit NoRootArrayScope(MacroAssembler* assembler) |
| 88 | : variable_(&assembler->root_array_available_), |
| 89 | old_value_(assembler->root_array_available_) { |
| 90 | assembler->root_array_available_ = false; |
| 91 | } |
| 92 | ~NoRootArrayScope() { |
| 93 | *variable_ = old_value_; |
| 94 | } |
| 95 | private: |
| 96 | bool* variable_; |
| 97 | bool old_value_; |
| 98 | }; |
| 99 | |
| 100 | // Operand pointing to an external reference. |
| 101 | // May emit code to set up the scratch register. The operand is |
| 102 | // only guaranteed to be correct as long as the scratch register |
| 103 | // isn't changed. |
| 104 | // If the operand is used more than once, use a scratch register |
| 105 | // that is guaranteed not to be clobbered. |
| 106 | Operand ExternalOperand(ExternalReference reference, |
| 107 | Register scratch = kScratchRegister); |
| 108 | // Loads and stores the value of an external reference. |
| 109 | // Special case code for load and store to take advantage of |
| 110 | // load_rax/store_rax if possible/necessary. |
| 111 | // For other operations, just use: |
| 112 | // Operand operand = ExternalOperand(extref); |
| 113 | // operation(operand, ..); |
| 114 | void Load(Register destination, ExternalReference source); |
| 115 | void Store(ExternalReference destination, Register source); |
| 116 | // Loads the address of the external reference into the destination |
| 117 | // register. |
| 118 | void LoadAddress(Register destination, ExternalReference source); |
| 119 | // Returns the size of the code generated by LoadAddress. |
| 120 | // Used by CallSize(ExternalReference) to find the size of a call. |
| 121 | int LoadAddressSize(ExternalReference source); |
| 122 | |
| 123 | // Operations on roots in the root-array. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 124 | void LoadRoot(Register destination, Heap::RootListIndex index); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 125 | void StoreRoot(Register source, Heap::RootListIndex index); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 126 | // Load a root value where the index (or part of it) is variable. |
| 127 | // The variable_offset register is added to the fixed_offset value |
| 128 | // to get the index into the root-array. |
| 129 | void LoadRootIndexed(Register destination, |
| 130 | Register variable_offset, |
| 131 | int fixed_offset); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 132 | void CompareRoot(Register with, Heap::RootListIndex index); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 133 | void CompareRoot(const Operand& with, Heap::RootListIndex index); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 134 | void PushRoot(Heap::RootListIndex index); |
| 135 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 136 | // --------------------------------------------------------------------------- |
| 137 | // GC Support |
| 138 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 139 | // For page containing |object| mark region covering |addr| dirty. |
| 140 | // RecordWriteHelper only works if the object is not in new |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 141 | // space. |
| 142 | void RecordWriteHelper(Register object, |
| 143 | Register addr, |
| 144 | Register scratch); |
| 145 | |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 146 | // Check if object is in new space. The condition cc can be equal or |
| 147 | // not_equal. If it is equal a jump will be done if the object is on new |
| 148 | // space. The register scratch can be object itself, but it will be clobbered. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 149 | template <typename LabelType> |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 150 | void InNewSpace(Register object, |
| 151 | Register scratch, |
| 152 | Condition cc, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 153 | LabelType* branch); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 154 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 155 | // For page containing |object| mark region covering [object+offset] |
| 156 | // dirty. |object| is the object being stored into, |value| is the |
| 157 | // object being stored. If |offset| is zero, then the |scratch| |
| 158 | // register contains the array index into the elements array |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 159 | // represented as an untagged 32-bit integer. All registers are |
| 160 | // clobbered by the operation. RecordWrite filters out smis so it |
| 161 | // 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] | 162 | void RecordWrite(Register object, |
| 163 | int offset, |
| 164 | Register value, |
| 165 | Register scratch); |
| 166 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 167 | // For page containing |object| mark region covering [address] |
| 168 | // dirty. |object| is the object being stored into, |value| is the |
| 169 | // object being stored. All registers are clobbered by the |
| 170 | // operation. RecordWrite filters out smis so it does not update |
| 171 | // the write barrier if the value is a smi. |
| 172 | void RecordWrite(Register object, |
| 173 | Register address, |
| 174 | Register value); |
| 175 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 176 | // 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] | 177 | // The value is known to not be a smi. |
| 178 | // object is the object being stored into, value is the object being stored. |
| 179 | // 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] | 180 | // 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] | 181 | // All registers are clobbered by the operation. |
| 182 | void RecordWriteNonSmi(Register object, |
| 183 | int offset, |
| 184 | Register value, |
| 185 | Register scratch); |
| 186 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 187 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 188 | // --------------------------------------------------------------------------- |
| 189 | // Debugger Support |
| 190 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 191 | void DebugBreak(); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 192 | #endif |
| 193 | |
| 194 | // --------------------------------------------------------------------------- |
| 195 | // Activation frames |
| 196 | |
| 197 | void EnterInternalFrame() { EnterFrame(StackFrame::INTERNAL); } |
| 198 | void LeaveInternalFrame() { LeaveFrame(StackFrame::INTERNAL); } |
| 199 | |
| 200 | void EnterConstructFrame() { EnterFrame(StackFrame::CONSTRUCT); } |
| 201 | void LeaveConstructFrame() { LeaveFrame(StackFrame::CONSTRUCT); } |
| 202 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 203 | // Enter specific kind of exit frame; either in normal or |
| 204 | // debug mode. Expects the number of arguments in register rax and |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 205 | // sets up the number of arguments in register rdi and the pointer |
| 206 | // to the first argument in register rsi. |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 207 | // |
| 208 | // Allocates arg_stack_space * kPointerSize memory (not GCed) on the stack |
| 209 | // accessible via StackSpaceOperand. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 210 | void EnterExitFrame(int arg_stack_space = 0, bool save_doubles = false); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 211 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 212 | // Enter specific kind of exit frame. Allocates arg_stack_space * kPointerSize |
| 213 | // memory (not GCed) on the stack accessible via StackSpaceOperand. |
| 214 | void EnterApiExitFrame(int arg_stack_space); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 215 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 216 | // Leave the current exit frame. Expects/provides the return value in |
| 217 | // register rax:rdx (untouched) and the pointer to the first |
| 218 | // argument in register rsi. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 219 | void LeaveExitFrame(bool save_doubles = false); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 220 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 221 | // Leave the current exit frame. Expects/provides the return value in |
| 222 | // register rax (untouched). |
| 223 | void LeaveApiExitFrame(); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 224 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 225 | // Push and pop the registers that can hold pointers. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 226 | void PushSafepointRegisters() { Pushad(); } |
| 227 | void PopSafepointRegisters() { Popad(); } |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 228 | // Store the value in register src in the safepoint register stack |
| 229 | // slot for register dst. |
| 230 | void StoreToSafepointRegisterSlot(Register dst, Register src); |
vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 231 | void LoadFromSafepointRegisterSlot(Register dst, Register src); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 232 | |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 233 | void InitializeRootRegister() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 234 | ExternalReference roots_address = |
| 235 | ExternalReference::roots_address(isolate()); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 236 | movq(kRootRegister, roots_address); |
| 237 | addq(kRootRegister, Immediate(kRootRegisterBias)); |
| 238 | } |
| 239 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 240 | // --------------------------------------------------------------------------- |
| 241 | // JavaScript invokes |
| 242 | |
| 243 | // Invoke the JavaScript function code by either calling or jumping. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 244 | void InvokeCode(Register code, |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 245 | const ParameterCount& expected, |
| 246 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 247 | InvokeFlag flag, |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 248 | CallWrapper* call_wrapper = NULL); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 249 | |
| 250 | void InvokeCode(Handle<Code> code, |
| 251 | const ParameterCount& expected, |
| 252 | const ParameterCount& actual, |
| 253 | RelocInfo::Mode rmode, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 254 | InvokeFlag flag, |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 255 | CallWrapper* call_wrapper = NULL); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 256 | |
| 257 | // Invoke the JavaScript function in the given register. Changes the |
| 258 | // current context to the context in the function before invoking. |
| 259 | void InvokeFunction(Register function, |
| 260 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 261 | InvokeFlag flag, |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 262 | CallWrapper* call_wrapper = NULL); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 263 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 264 | void InvokeFunction(JSFunction* function, |
| 265 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 266 | InvokeFlag flag, |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 267 | CallWrapper* call_wrapper = NULL); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 268 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 269 | // Invoke specified builtin JavaScript function. Adds an entry to |
| 270 | // the unresolved list if the name does not resolve. |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 271 | void InvokeBuiltin(Builtins::JavaScript id, |
| 272 | InvokeFlag flag, |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 273 | CallWrapper* call_wrapper = NULL); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 274 | |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 275 | // Store the function for the given builtin in the target register. |
| 276 | void GetBuiltinFunction(Register target, Builtins::JavaScript id); |
| 277 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 278 | // Store the code object for the given builtin in the target register. |
| 279 | void GetBuiltinEntry(Register target, Builtins::JavaScript id); |
| 280 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 281 | |
| 282 | // --------------------------------------------------------------------------- |
| 283 | // Smi tagging, untagging and operations on tagged smis. |
| 284 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 285 | void InitializeSmiConstantRegister() { |
| 286 | movq(kSmiConstantRegister, |
| 287 | reinterpret_cast<uint64_t>(Smi::FromInt(kSmiConstantRegisterValue)), |
| 288 | RelocInfo::NONE); |
| 289 | } |
| 290 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 291 | // Conversions between tagged smi values and non-tagged integer values. |
| 292 | |
| 293 | // 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] | 294 | // 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] | 295 | // based on the value of the resulting smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 296 | void Integer32ToSmi(Register dst, Register src); |
| 297 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 298 | // Stores an integer32 value into a memory field that already holds a smi. |
| 299 | void Integer32ToSmiField(const Operand& dst, Register src); |
| 300 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 301 | // Adds constant to src and tags the result as a smi. |
| 302 | // Result must be a valid smi. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 303 | void Integer64PlusConstantToSmi(Register dst, Register src, int constant); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 304 | |
| 305 | // Convert smi to 32-bit integer. I.e., not sign extended into |
| 306 | // high 32 bits of destination. |
| 307 | void SmiToInteger32(Register dst, Register src); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 308 | void SmiToInteger32(Register dst, const Operand& src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 309 | |
| 310 | // Convert smi to 64-bit integer (sign extended if necessary). |
| 311 | void SmiToInteger64(Register dst, Register src); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 312 | void SmiToInteger64(Register dst, const Operand& src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 313 | |
| 314 | // Multiply a positive smi's integer value by a power of two. |
| 315 | // Provides result as 64-bit integer value. |
| 316 | void PositiveSmiTimesPowerOfTwoToInteger64(Register dst, |
| 317 | Register src, |
| 318 | int power); |
| 319 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 320 | // Divide a positive smi's integer value by a power of two. |
| 321 | // Provides result as 32-bit integer value. |
| 322 | void PositiveSmiDivPowerOfTwoToInteger32(Register dst, |
| 323 | Register src, |
| 324 | int power); |
| 325 | |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 326 | // Perform the logical or of two smi values and return a smi value. |
| 327 | // If either argument is not a smi, jump to on_not_smis and retain |
| 328 | // the original values of source registers. The destination register |
| 329 | // may be changed if it's not one of the source registers. |
| 330 | template <typename LabelType> |
| 331 | void SmiOrIfSmis(Register dst, |
| 332 | Register src1, |
| 333 | Register src2, |
| 334 | LabelType* on_not_smis); |
| 335 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 336 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 337 | // Simple comparison of smis. Both sides must be known smis to use these, |
| 338 | // otherwise use Cmp. |
| 339 | void SmiCompare(Register smi1, Register smi2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 340 | void SmiCompare(Register dst, Smi* src); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 341 | void SmiCompare(Register dst, const Operand& src); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 342 | void SmiCompare(const Operand& dst, Register src); |
| 343 | void SmiCompare(const Operand& dst, Smi* src); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 344 | // Compare the int32 in src register to the value of the smi stored at dst. |
| 345 | void SmiCompareInteger32(const Operand& dst, Register src); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 346 | // Sets sign and zero flags depending on value of smi in register. |
| 347 | void SmiTest(Register src); |
| 348 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 349 | // Functions performing a check on a known or potential smi. Returns |
| 350 | // a condition that is satisfied if the check is successful. |
| 351 | |
| 352 | // Is the value a tagged smi. |
| 353 | Condition CheckSmi(Register src); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 354 | Condition CheckSmi(const Operand& src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 355 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 356 | // Is the value a non-negative tagged smi. |
| 357 | Condition CheckNonNegativeSmi(Register src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 358 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 359 | // Are both values tagged smis. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 360 | Condition CheckBothSmi(Register first, Register second); |
| 361 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 362 | // Are both values non-negative tagged smis. |
| 363 | Condition CheckBothNonNegativeSmi(Register first, Register second); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 364 | |
| 365 | // Are either value a tagged smi. |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 366 | Condition CheckEitherSmi(Register first, |
| 367 | Register second, |
| 368 | Register scratch = kScratchRegister); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 369 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 370 | // Is the value the minimum smi value (since we are using |
| 371 | // two's complement numbers, negating the value is known to yield |
| 372 | // a non-smi value). |
| 373 | Condition CheckIsMinSmi(Register src); |
| 374 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 375 | // Checks whether an 32-bit integer value is a valid for conversion |
| 376 | // to a smi. |
| 377 | Condition CheckInteger32ValidSmiValue(Register src); |
| 378 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 379 | // Checks whether an 32-bit unsigned integer value is a valid for |
| 380 | // conversion to a smi. |
| 381 | Condition CheckUInteger32ValidSmiValue(Register src); |
| 382 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 383 | // Check whether src is a Smi, and set dst to zero if it is a smi, |
| 384 | // and to one if it isn't. |
| 385 | void CheckSmiToIndicator(Register dst, Register src); |
| 386 | void CheckSmiToIndicator(Register dst, const Operand& src); |
| 387 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 388 | // Test-and-jump functions. Typically combines a check function |
| 389 | // above with a conditional jump. |
| 390 | |
| 391 | // Jump if the value cannot be represented by a smi. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 392 | template <typename LabelType> |
| 393 | void JumpIfNotValidSmiValue(Register src, LabelType* on_invalid); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 394 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 395 | // Jump if the unsigned integer value cannot be represented by a smi. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 396 | template <typename LabelType> |
| 397 | void JumpIfUIntNotValidSmiValue(Register src, LabelType* on_invalid); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 398 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 399 | // Jump to label if the value is a tagged smi. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 400 | template <typename LabelType> |
| 401 | void JumpIfSmi(Register src, LabelType* on_smi); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 402 | |
| 403 | // Jump to label if the value is not a tagged smi. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 404 | template <typename LabelType> |
| 405 | void JumpIfNotSmi(Register src, LabelType* on_not_smi); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 406 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 407 | // Jump to label if the value is not a non-negative tagged smi. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 408 | template <typename LabelType> |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 409 | void JumpUnlessNonNegativeSmi(Register src, LabelType* on_not_smi); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 410 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 411 | // 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] | 412 | // to the constant. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 413 | template <typename LabelType> |
| 414 | void JumpIfSmiEqualsConstant(Register src, |
| 415 | Smi* constant, |
| 416 | LabelType* on_equals); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 417 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 418 | // Jump if either or both register are not smi values. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 419 | template <typename LabelType> |
| 420 | void JumpIfNotBothSmi(Register src1, |
| 421 | Register src2, |
| 422 | LabelType* on_not_both_smi); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 423 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 424 | // Jump if either or both register are not non-negative smi values. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 425 | template <typename LabelType> |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 426 | void JumpUnlessBothNonNegativeSmi(Register src1, Register src2, |
| 427 | LabelType* on_not_both_smi); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 428 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 429 | // Operations on tagged smi values. |
| 430 | |
| 431 | // Smis represent a subset of integers. The subset is always equivalent to |
| 432 | // a two's complement interpretation of a fixed number of bits. |
| 433 | |
| 434 | // Optimistically adds an integer constant to a supposed smi. |
| 435 | // If the src is not a smi, or the result is not a smi, jump to |
| 436 | // the label. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 437 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 438 | void SmiTryAddConstant(Register dst, |
| 439 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 440 | Smi* constant, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 441 | LabelType* on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 442 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 443 | // Add an integer constant to a tagged smi, giving a tagged smi as result. |
| 444 | // No overflow testing on the result is done. |
| 445 | void SmiAddConstant(Register dst, Register src, Smi* constant); |
| 446 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 447 | // Add an integer constant to a tagged smi, giving a tagged smi as result. |
| 448 | // No overflow testing on the result is done. |
| 449 | void SmiAddConstant(const Operand& dst, Smi* constant); |
| 450 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 451 | // Add an integer constant to a tagged smi, giving a tagged smi as result, |
| 452 | // or jumping to a label if the result cannot be represented by a smi. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 453 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 454 | void SmiAddConstant(Register dst, |
| 455 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 456 | Smi* constant, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 457 | LabelType* on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 458 | |
| 459 | // 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] | 460 | // result. No testing on the result is done. Sets the N and Z flags |
| 461 | // based on the value of the resulting integer. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 462 | void SmiSubConstant(Register dst, Register src, Smi* constant); |
| 463 | |
| 464 | // 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] | 465 | // result, or jumping to a label if the result cannot be represented by a smi. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 466 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 467 | void SmiSubConstant(Register dst, |
| 468 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 469 | Smi* constant, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 470 | LabelType* on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 471 | |
| 472 | // 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] | 473 | // NOTICE: This operation jumps on success, not failure! |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 474 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 475 | void SmiNeg(Register dst, |
| 476 | Register src, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 477 | LabelType* on_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 478 | |
| 479 | // Adds smi values and return the result as a smi. |
| 480 | // If dst is src1, then src1 will be destroyed, even if |
| 481 | // the operation is unsuccessful. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 482 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 483 | void SmiAdd(Register dst, |
| 484 | Register src1, |
| 485 | Register src2, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 486 | LabelType* on_not_smi_result); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 487 | template <typename LabelType> |
| 488 | void SmiAdd(Register dst, |
| 489 | Register src1, |
| 490 | const Operand& src2, |
| 491 | LabelType* on_not_smi_result); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 492 | |
| 493 | void SmiAdd(Register dst, |
| 494 | Register src1, |
| 495 | Register src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 496 | |
| 497 | // Subtracts smi values and return the result as a smi. |
| 498 | // If dst is src1, then src1 will be destroyed, even if |
| 499 | // the operation is unsuccessful. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 500 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 501 | void SmiSub(Register dst, |
| 502 | Register src1, |
| 503 | Register src2, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 504 | LabelType* on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 505 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 506 | void SmiSub(Register dst, |
| 507 | Register src1, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 508 | Register src2); |
| 509 | |
| 510 | template <typename LabelType> |
| 511 | void SmiSub(Register dst, |
| 512 | Register src1, |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 513 | const Operand& src2, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 514 | LabelType* on_not_smi_result); |
| 515 | |
| 516 | void SmiSub(Register dst, |
| 517 | Register src1, |
| 518 | const Operand& src2); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 519 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 520 | // Multiplies smi values and return the result as a smi, |
| 521 | // if possible. |
| 522 | // If dst is src1, then src1 will be destroyed, even if |
| 523 | // the operation is unsuccessful. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 524 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 525 | void SmiMul(Register dst, |
| 526 | Register src1, |
| 527 | Register src2, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 528 | LabelType* on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 529 | |
| 530 | // Divides one smi by another and returns the quotient. |
| 531 | // Clobbers rax and rdx registers. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 532 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 533 | void SmiDiv(Register dst, |
| 534 | Register src1, |
| 535 | Register src2, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 536 | LabelType* on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 537 | |
| 538 | // Divides one smi by another and returns the remainder. |
| 539 | // Clobbers rax and rdx registers. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 540 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 541 | void SmiMod(Register dst, |
| 542 | Register src1, |
| 543 | Register src2, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 544 | LabelType* on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 545 | |
| 546 | // Bitwise operations. |
| 547 | void SmiNot(Register dst, Register src); |
| 548 | void SmiAnd(Register dst, Register src1, Register src2); |
| 549 | void SmiOr(Register dst, Register src1, Register src2); |
| 550 | void SmiXor(Register dst, Register src1, Register src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 551 | void SmiAndConstant(Register dst, Register src1, Smi* constant); |
| 552 | void SmiOrConstant(Register dst, Register src1, Smi* constant); |
| 553 | void SmiXorConstant(Register dst, Register src1, Smi* constant); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 554 | |
| 555 | void SmiShiftLeftConstant(Register dst, |
| 556 | Register src, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 557 | int shift_value); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 558 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 559 | void SmiShiftLogicalRightConstant(Register dst, |
| 560 | Register src, |
| 561 | int shift_value, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 562 | LabelType* on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 563 | void SmiShiftArithmeticRightConstant(Register dst, |
| 564 | Register src, |
| 565 | int shift_value); |
| 566 | |
| 567 | // Shifts a smi value to the left, and returns the result if that is a smi. |
| 568 | // Uses and clobbers rcx, so dst may not be rcx. |
| 569 | void SmiShiftLeft(Register dst, |
| 570 | Register src1, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 571 | Register src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 572 | // Shifts a smi value to the right, shifting in zero bits at the top, and |
| 573 | // returns the unsigned intepretation of the result if that is a smi. |
| 574 | // Uses and clobbers rcx, so dst may not be rcx. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 575 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 576 | void SmiShiftLogicalRight(Register dst, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 577 | Register src1, |
| 578 | Register src2, |
| 579 | LabelType* on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 580 | // Shifts a smi value to the right, sign extending the top, and |
| 581 | // returns the signed intepretation of the result. That will always |
| 582 | // be a valid smi value, since it's numerically smaller than the |
| 583 | // original. |
| 584 | // Uses and clobbers rcx, so dst may not be rcx. |
| 585 | void SmiShiftArithmeticRight(Register dst, |
| 586 | Register src1, |
| 587 | Register src2); |
| 588 | |
| 589 | // Specialized operations |
| 590 | |
| 591 | // Select the non-smi register of two registers where exactly one is a |
| 592 | // smi. If neither are smis, jump to the failure label. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 593 | template <typename LabelType> |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 594 | void SelectNonSmi(Register dst, |
| 595 | Register src1, |
| 596 | Register src2, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 597 | LabelType* on_not_smis); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 598 | |
| 599 | // Converts, if necessary, a smi to a combination of number and |
| 600 | // multiplier to be used as a scaled index. |
| 601 | // The src register contains a *positive* smi value. The shift is the |
| 602 | // power of two to multiply the index value by (e.g. |
| 603 | // to index by smi-value * kPointerSize, pass the smi and kPointerSizeLog2). |
| 604 | // The returned index register may be either src or dst, depending |
| 605 | // on what is most efficient. If src and dst are different registers, |
| 606 | // src is always unchanged. |
| 607 | SmiIndex SmiToIndex(Register dst, Register src, int shift); |
| 608 | |
| 609 | // Converts a positive smi to a negative index. |
| 610 | SmiIndex SmiToNegativeIndex(Register dst, Register src, int shift); |
| 611 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 612 | // Add the value of a smi in memory to an int32 register. |
| 613 | // Sets flags as a normal add. |
| 614 | void AddSmiField(Register dst, const Operand& src); |
| 615 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 616 | // Basic Smi operations. |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 617 | void Move(Register dst, Smi* source) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 618 | LoadSmiConstant(dst, source); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 619 | } |
| 620 | |
| 621 | void Move(const Operand& dst, Smi* source) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 622 | Register constant = GetSmiConstant(source); |
| 623 | movq(dst, constant); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 624 | } |
| 625 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 626 | void Push(Smi* smi); |
| 627 | void Test(const Operand& dst, Smi* source); |
| 628 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 629 | // --------------------------------------------------------------------------- |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 630 | // String macros. |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 631 | |
| 632 | // If object is a string, its map is loaded into object_map. |
| 633 | template <typename LabelType> |
| 634 | void JumpIfNotString(Register object, |
| 635 | Register object_map, |
| 636 | LabelType* not_string); |
| 637 | |
| 638 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 639 | template <typename LabelType> |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 640 | void JumpIfNotBothSequentialAsciiStrings(Register first_object, |
| 641 | Register second_object, |
| 642 | Register scratch1, |
| 643 | Register scratch2, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 644 | LabelType* on_not_both_flat_ascii); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 645 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 646 | // Check whether the instance type represents a flat ascii string. Jump to the |
| 647 | // label if not. If the instance type can be scratched specify same register |
| 648 | // for both instance type and scratch. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 649 | template <typename LabelType> |
| 650 | void JumpIfInstanceTypeIsNotSequentialAscii( |
| 651 | Register instance_type, |
| 652 | Register scratch, |
| 653 | LabelType *on_not_flat_ascii_string); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 654 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 655 | template <typename LabelType> |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 656 | void JumpIfBothInstanceTypesAreNotSequentialAscii( |
| 657 | Register first_object_instance_type, |
| 658 | Register second_object_instance_type, |
| 659 | Register scratch1, |
| 660 | Register scratch2, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 661 | LabelType* on_fail); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 662 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 663 | // --------------------------------------------------------------------------- |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 664 | // Macro instructions. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 665 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 666 | // Load a register with a long value as efficiently as possible. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 667 | void Set(Register dst, int64_t x); |
| 668 | void Set(const Operand& dst, int64_t x); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 669 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 670 | // Move if the registers are not identical. |
| 671 | void Move(Register target, Register source); |
| 672 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 673 | // Handle support |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 674 | void Move(Register dst, Handle<Object> source); |
| 675 | void Move(const Operand& dst, Handle<Object> source); |
| 676 | void Cmp(Register dst, Handle<Object> source); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 677 | void Cmp(const Operand& dst, Handle<Object> source); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 678 | void Cmp(Register dst, Smi* src); |
| 679 | void Cmp(const Operand& dst, Smi* src); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 680 | void Push(Handle<Object> source); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 681 | |
| 682 | // Emit code to discard a non-negative number of pointer-sized elements |
| 683 | // from the stack, clobbering only the rsp register. |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 684 | void Drop(int stack_elements); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 685 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 686 | void Call(Label* target) { call(target); } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 687 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 688 | // Control Flow |
| 689 | void Jump(Address destination, RelocInfo::Mode rmode); |
| 690 | void Jump(ExternalReference ext); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 691 | void Jump(Handle<Code> code_object, RelocInfo::Mode rmode); |
| 692 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 693 | void Call(Address destination, RelocInfo::Mode rmode); |
| 694 | void Call(ExternalReference ext); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame^] | 695 | void Call(Handle<Code> code_object, |
| 696 | RelocInfo::Mode rmode, |
| 697 | unsigned ast_id = kNoASTId); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 698 | |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 699 | // The size of the code generated for different call instructions. |
| 700 | int CallSize(Address destination, RelocInfo::Mode rmode) { |
| 701 | return kCallInstructionLength; |
| 702 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 703 | int CallSize(ExternalReference ext); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 704 | int CallSize(Handle<Code> code_object) { |
| 705 | // Code calls use 32-bit relative addressing. |
| 706 | return kShortCallInstructionLength; |
| 707 | } |
| 708 | int CallSize(Register target) { |
| 709 | // Opcode: REX_opt FF /2 m64 |
| 710 | return (target.high_bit() != 0) ? 3 : 2; |
| 711 | } |
| 712 | int CallSize(const Operand& target) { |
| 713 | // Opcode: REX_opt FF /2 m64 |
| 714 | return (target.requires_rex() ? 2 : 1) + target.operand_size(); |
| 715 | } |
| 716 | |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 717 | // Emit call to the code we are currently generating. |
| 718 | void CallSelf() { |
| 719 | Handle<Code> self(reinterpret_cast<Code**>(CodeObject().location())); |
| 720 | Call(self, RelocInfo::CODE_TARGET); |
| 721 | } |
| 722 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 723 | // Non-x64 instructions. |
| 724 | // Push/pop all general purpose registers. |
| 725 | // Does not push rsp/rbp nor any of the assembler's special purpose registers |
| 726 | // (kScratchRegister, kSmiConstantRegister, kRootRegister). |
| 727 | void Pushad(); |
| 728 | void Popad(); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 729 | // Sets the stack as after performing Popad, without actually loading the |
| 730 | // registers. |
| 731 | void Dropad(); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 732 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 733 | // Compare object type for heap object. |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 734 | // Always use unsigned comparisons: above and below, not less and greater. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 735 | // Incoming register is heap_object and outgoing register is map. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 736 | // They may be the same register, and may be kScratchRegister. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 737 | void CmpObjectType(Register heap_object, InstanceType type, Register map); |
| 738 | |
| 739 | // Compare instance type for map. |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 740 | // Always use unsigned comparisons: above and below, not less and greater. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 741 | void CmpInstanceType(Register map, InstanceType type); |
| 742 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 743 | // Check if the map of an object is equal to a specified map and |
| 744 | // branch to label if not. Skip the smi check if not required |
| 745 | // (object is known to be a heap object) |
| 746 | void CheckMap(Register obj, |
| 747 | Handle<Map> map, |
| 748 | Label* fail, |
| 749 | bool is_heap_object); |
| 750 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 751 | // Check if the object in register heap_object is a string. Afterwards the |
| 752 | // register map contains the object map and the register instance_type |
| 753 | // contains the instance_type. The registers map and instance_type can be the |
| 754 | // same in which case it contains the instance type afterwards. Either of the |
| 755 | // registers map and instance_type can be the same as heap_object. |
| 756 | Condition IsObjectStringType(Register heap_object, |
| 757 | Register map, |
| 758 | Register instance_type); |
| 759 | |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 760 | // FCmp compares and pops the two values on top of the FPU stack. |
| 761 | // The flag results are similar to integer cmp, but requires unsigned |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 762 | // jcc instructions (je, ja, jae, jb, jbe, je, and jz). |
| 763 | void FCmp(); |
| 764 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 765 | // 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] | 766 | void AbortIfNotNumber(Register object); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 767 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 768 | // Abort execution if argument is a smi. Used in debug code. |
| 769 | void AbortIfSmi(Register object); |
| 770 | |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 771 | // 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] | 772 | void AbortIfNotSmi(Register object); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 773 | void AbortIfNotSmi(const Operand& object); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 774 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 775 | // Abort execution if argument is a string. Used in debug code. |
| 776 | void AbortIfNotString(Register object); |
| 777 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 778 | // Abort execution if argument is not the root value with the given index. |
| 779 | void AbortIfNotRootValue(Register src, |
| 780 | Heap::RootListIndex root_value_index, |
| 781 | const char* message); |
| 782 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 783 | // --------------------------------------------------------------------------- |
| 784 | // Exception handling |
| 785 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 786 | // Push a new try handler and link into try handler chain. The return |
| 787 | // address must be pushed before calling this helper. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 788 | void PushTryHandler(CodeLocation try_location, HandlerType type); |
| 789 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 790 | // Unlink the stack handler on top of the stack from the try handler chain. |
| 791 | void PopTryHandler(); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 792 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 793 | // Activate the top handler in the try hander chain and pass the |
| 794 | // thrown value. |
| 795 | void Throw(Register value); |
| 796 | |
| 797 | // Propagate an uncatchable exception out of the current JS stack. |
| 798 | void ThrowUncatchable(UncatchableExceptionType type, Register value); |
| 799 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 800 | // --------------------------------------------------------------------------- |
| 801 | // Inline caching support |
| 802 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 803 | // Generate code for checking access rights - used for security checks |
| 804 | // on access to global objects across environments. The holder register |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 805 | // is left untouched, but the scratch register and kScratchRegister, |
| 806 | // which must be different, are clobbered. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 807 | void CheckAccessGlobalProxy(Register holder_reg, |
| 808 | Register scratch, |
| 809 | Label* miss); |
| 810 | |
| 811 | |
| 812 | // --------------------------------------------------------------------------- |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 813 | // Allocation support |
| 814 | |
| 815 | // Allocate an object in new space. If the new space is exhausted control |
| 816 | // continues at the gc_required label. The allocated object is returned in |
| 817 | // result and end of the new object is returned in result_end. The register |
| 818 | // scratch can be passed as no_reg in which case an additional object |
| 819 | // reference will be added to the reloc info. The returned pointers in result |
| 820 | // and result_end have not yet been tagged as heap objects. If |
| 821 | // result_contains_top_on_entry is true the content of result is known to be |
| 822 | // 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] | 823 | // AllocateInNewSpace). If result_contains_top_on_entry is true scratch |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 824 | // should be no_reg as it is never used. |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 825 | void AllocateInNewSpace(int object_size, |
| 826 | Register result, |
| 827 | Register result_end, |
| 828 | Register scratch, |
| 829 | Label* gc_required, |
| 830 | AllocationFlags flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 831 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 832 | void AllocateInNewSpace(int header_size, |
| 833 | ScaleFactor element_size, |
| 834 | Register element_count, |
| 835 | Register result, |
| 836 | Register result_end, |
| 837 | Register scratch, |
| 838 | Label* gc_required, |
| 839 | AllocationFlags flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 840 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 841 | void AllocateInNewSpace(Register object_size, |
| 842 | Register result, |
| 843 | Register result_end, |
| 844 | Register scratch, |
| 845 | Label* gc_required, |
| 846 | AllocationFlags flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 847 | |
| 848 | // Undo allocation in new space. The object passed and objects allocated after |
| 849 | // it will no longer be allocated. Make sure that no pointers are left to the |
| 850 | // object(s) no longer allocated as they would be invalid when allocation is |
| 851 | // un-done. |
| 852 | void UndoAllocationInNewSpace(Register object); |
| 853 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 854 | // Allocate a heap number in new space with undefined value. Returns |
| 855 | // tagged pointer in result register, or jumps to gc_required if new |
| 856 | // space is full. |
| 857 | void AllocateHeapNumber(Register result, |
| 858 | Register scratch, |
| 859 | Label* gc_required); |
| 860 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 861 | // Allocate a sequential string. All the header fields of the string object |
| 862 | // are initialized. |
| 863 | void AllocateTwoByteString(Register result, |
| 864 | Register length, |
| 865 | Register scratch1, |
| 866 | Register scratch2, |
| 867 | Register scratch3, |
| 868 | Label* gc_required); |
| 869 | void AllocateAsciiString(Register result, |
| 870 | Register length, |
| 871 | Register scratch1, |
| 872 | Register scratch2, |
| 873 | Register scratch3, |
| 874 | Label* gc_required); |
| 875 | |
| 876 | // Allocate a raw cons string object. Only the map field of the result is |
| 877 | // initialized. |
| 878 | void AllocateConsString(Register result, |
| 879 | Register scratch1, |
| 880 | Register scratch2, |
| 881 | Label* gc_required); |
| 882 | void AllocateAsciiConsString(Register result, |
| 883 | Register scratch1, |
| 884 | Register scratch2, |
| 885 | Label* gc_required); |
| 886 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 887 | // --------------------------------------------------------------------------- |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 888 | // Support functions. |
| 889 | |
| 890 | // Check if result is zero and op is negative. |
| 891 | void NegativeZeroTest(Register result, Register op, Label* then_label); |
| 892 | |
| 893 | // Check if result is zero and op is negative in code using jump targets. |
| 894 | void NegativeZeroTest(CodeGenerator* cgen, |
| 895 | Register result, |
| 896 | Register op, |
| 897 | JumpTarget* then_target); |
| 898 | |
| 899 | // Check if result is zero and any of op1 and op2 are negative. |
| 900 | // Register scratch is destroyed, and it must be different from op2. |
| 901 | void NegativeZeroTest(Register result, Register op1, Register op2, |
| 902 | Register scratch, Label* then_label); |
| 903 | |
| 904 | // Try to get function prototype of a function and puts the value in |
| 905 | // the result register. Checks that the function really is a |
| 906 | // 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] | 907 | // function register will be untouched; the other register may be |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 908 | // clobbered. |
| 909 | void TryGetFunctionPrototype(Register function, |
| 910 | Register result, |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 911 | Label* miss); |
| 912 | |
| 913 | // Generates code for reporting that an illegal operation has |
| 914 | // occurred. |
| 915 | void IllegalOperation(int num_arguments); |
| 916 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 917 | // Picks out an array index from the hash field. |
| 918 | // Register use: |
| 919 | // hash - holds the index's hash. Clobbered. |
| 920 | // index - holds the overwritten index on exit. |
| 921 | void IndexFromHash(Register hash, Register index); |
| 922 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 923 | // Find the function context up the context chain. |
| 924 | void LoadContext(Register dst, int context_chain_length); |
| 925 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 926 | // Load the global function with the given index. |
| 927 | void LoadGlobalFunction(int index, Register function); |
| 928 | |
| 929 | // Load the initial map from the global function. The registers |
| 930 | // function and map can be the same. |
| 931 | void LoadGlobalFunctionInitialMap(Register function, Register map); |
| 932 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 933 | // --------------------------------------------------------------------------- |
| 934 | // Runtime calls |
| 935 | |
| 936 | // Call a code stub. |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame^] | 937 | void CallStub(CodeStub* stub, unsigned ast_id = kNoASTId); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 938 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 939 | // Call a code stub and return the code object called. Try to generate |
| 940 | // the code if necessary. Do not perform a GC but instead return a retry |
| 941 | // after GC failure. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 942 | MUST_USE_RESULT MaybeObject* TryCallStub(CodeStub* stub); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 943 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 944 | // Tail call a code stub (jump). |
| 945 | void TailCallStub(CodeStub* stub); |
| 946 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 947 | // Tail call a code stub (jump) and return the code object called. Try to |
| 948 | // generate the code if necessary. Do not perform a GC but instead return |
| 949 | // a retry after GC failure. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 950 | MUST_USE_RESULT MaybeObject* TryTailCallStub(CodeStub* stub); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 951 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 952 | // Return from a code stub after popping its arguments. |
| 953 | void StubReturn(int argc); |
| 954 | |
| 955 | // Call a runtime routine. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 956 | void CallRuntime(const Runtime::Function* f, int num_arguments); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 957 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 958 | // Call a runtime function and save the value of XMM registers. |
| 959 | void CallRuntimeSaveDoubles(Runtime::FunctionId id); |
| 960 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 961 | // Call a runtime function, returning the CodeStub object called. |
| 962 | // Try to generate the stub code if necessary. Do not perform a GC |
| 963 | // but instead return a retry after GC failure. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 964 | MUST_USE_RESULT MaybeObject* TryCallRuntime(const Runtime::Function* f, |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 965 | int num_arguments); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 966 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 967 | // Convenience function: Same as above, but takes the fid instead. |
| 968 | void CallRuntime(Runtime::FunctionId id, int num_arguments); |
| 969 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 970 | // Convenience function: Same as above, but takes the fid instead. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 971 | MUST_USE_RESULT MaybeObject* TryCallRuntime(Runtime::FunctionId id, |
| 972 | int num_arguments); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 973 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 974 | // Convenience function: call an external reference. |
| 975 | void CallExternalReference(const ExternalReference& ext, |
| 976 | int num_arguments); |
| 977 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 978 | // Tail call of a runtime routine (jump). |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 979 | // Like JumpToExternalReference, but also takes care of passing the number |
| 980 | // of parameters. |
| 981 | void TailCallExternalReference(const ExternalReference& ext, |
| 982 | int num_arguments, |
| 983 | int result_size); |
| 984 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 985 | MUST_USE_RESULT MaybeObject* TryTailCallExternalReference( |
| 986 | const ExternalReference& ext, int num_arguments, int result_size); |
| 987 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 988 | // Convenience function: tail call a runtime routine (jump). |
| 989 | void TailCallRuntime(Runtime::FunctionId fid, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 990 | int num_arguments, |
| 991 | int result_size); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 992 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 993 | MUST_USE_RESULT MaybeObject* TryTailCallRuntime(Runtime::FunctionId fid, |
| 994 | int num_arguments, |
| 995 | int result_size); |
| 996 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 997 | // Jump to a runtime routine. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 998 | void JumpToExternalReference(const ExternalReference& ext, int result_size); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 999 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1000 | // Jump to a runtime routine. |
| 1001 | MaybeObject* TryJumpToExternalReference(const ExternalReference& ext, |
| 1002 | int result_size); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1003 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1004 | // Prepares stack to put arguments (aligns and so on). |
| 1005 | // WIN64 calling convention requires to put the pointer to the return value |
| 1006 | // slot into rcx (rcx must be preserverd until TryCallApiFunctionAndReturn). |
| 1007 | // Saves context (rsi). Clobbers rax. Allocates arg_stack_space * kPointerSize |
| 1008 | // inside the exit frame (not GCed) accessible via StackSpaceOperand. |
| 1009 | void PrepareCallApiFunction(int arg_stack_space); |
| 1010 | |
| 1011 | // Calls an API function. Allocates HandleScope, extracts |
| 1012 | // returned value from handle and propagates exceptions. |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 1013 | // Clobbers r14, r15, rbx and caller-save registers. Restores context. |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1014 | // On return removes stack_space * kPointerSize (GCed). |
| 1015 | MUST_USE_RESULT MaybeObject* TryCallApiFunctionAndReturn( |
| 1016 | ApiFunction* function, int stack_space); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1017 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1018 | // Before calling a C-function from generated code, align arguments on stack. |
| 1019 | // After aligning the frame, arguments must be stored in esp[0], esp[4], |
| 1020 | // etc., not pushed. The argument count assumes all arguments are word sized. |
| 1021 | // The number of slots reserved for arguments depends on platform. On Windows |
| 1022 | // stack slots are reserved for the arguments passed in registers. On other |
| 1023 | // platforms stack slots are only reserved for the arguments actually passed |
| 1024 | // on the stack. |
| 1025 | void PrepareCallCFunction(int num_arguments); |
| 1026 | |
| 1027 | // Calls a C function and cleans up the space for arguments allocated |
| 1028 | // by PrepareCallCFunction. The called function is not allowed to trigger a |
| 1029 | // garbage collection, since that might move the code and invalidate the |
| 1030 | // return address (unless this is somehow accounted for by the called |
| 1031 | // function). |
| 1032 | void CallCFunction(ExternalReference function, int num_arguments); |
| 1033 | void CallCFunction(Register function, int num_arguments); |
| 1034 | |
| 1035 | // Calculate the number of stack slots to reserve for arguments when calling a |
| 1036 | // C function. |
| 1037 | int ArgumentStackSlotsForCFunctionCall(int num_arguments); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1038 | |
| 1039 | // --------------------------------------------------------------------------- |
| 1040 | // Utilities |
| 1041 | |
| 1042 | void Ret(); |
| 1043 | |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 1044 | // Return and drop arguments from stack, where the number of arguments |
| 1045 | // may be bigger than 2^16 - 1. Requires a scratch register. |
| 1046 | void Ret(int bytes_dropped, Register scratch); |
| 1047 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 1048 | Handle<Object> CodeObject() { |
| 1049 | ASSERT(!code_object_.is_null()); |
| 1050 | return code_object_; |
| 1051 | } |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1052 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1053 | // Copy length bytes from source to destination. |
| 1054 | // Uses scratch register internally (if you have a low-eight register |
| 1055 | // free, do use it, otherwise kScratchRegister will be used). |
| 1056 | // The min_length is a minimum limit on the value that length will have. |
| 1057 | // The algorithm has some special cases that might be omitted if the string |
| 1058 | // is known to always be long. |
| 1059 | void CopyBytes(Register destination, |
| 1060 | Register source, |
| 1061 | Register length, |
| 1062 | int min_length = 0, |
| 1063 | Register scratch = kScratchRegister); |
| 1064 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1065 | |
| 1066 | // --------------------------------------------------------------------------- |
| 1067 | // StatsCounter support |
| 1068 | |
| 1069 | void SetCounter(StatsCounter* counter, int value); |
| 1070 | void IncrementCounter(StatsCounter* counter, int value); |
| 1071 | void DecrementCounter(StatsCounter* counter, int value); |
| 1072 | |
| 1073 | |
| 1074 | // --------------------------------------------------------------------------- |
| 1075 | // Debugging |
| 1076 | |
| 1077 | // Calls Abort(msg) if the condition cc is not satisfied. |
| 1078 | // Use --debug_code to enable. |
| 1079 | void Assert(Condition cc, const char* msg); |
| 1080 | |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 1081 | void AssertFastElements(Register elements); |
| 1082 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1083 | // Like Assert(), but always enabled. |
| 1084 | void Check(Condition cc, const char* msg); |
| 1085 | |
| 1086 | // Print a message to stdout and abort execution. |
| 1087 | void Abort(const char* msg); |
| 1088 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 1089 | // Check that the stack is aligned. |
| 1090 | void CheckStackAlignment(); |
| 1091 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1092 | // Verify restrictions about code generated in stubs. |
| 1093 | void set_generating_stub(bool value) { generating_stub_ = value; } |
| 1094 | bool generating_stub() { return generating_stub_; } |
| 1095 | void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; } |
| 1096 | bool allow_stub_calls() { return allow_stub_calls_; } |
| 1097 | |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 1098 | static int SafepointRegisterStackIndex(Register reg) { |
| 1099 | return SafepointRegisterStackIndex(reg.code()); |
| 1100 | } |
| 1101 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1102 | private: |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1103 | // Order general registers are pushed by Pushad. |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 1104 | // rax, rcx, rdx, rbx, rsi, rdi, r8, r9, r11, r14, r15. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1105 | static int kSafepointPushRegisterIndices[Register::kNumRegisters]; |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 1106 | static const int kNumSafepointSavedRegisters = 11; |
| 1107 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1108 | bool generating_stub_; |
| 1109 | bool allow_stub_calls_; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1110 | bool root_array_available_; |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1111 | |
| 1112 | // Returns a register holding the smi value. The register MUST NOT be |
| 1113 | // modified. It may be the "smi 1 constant" register. |
| 1114 | Register GetSmiConstant(Smi* value); |
| 1115 | |
| 1116 | // Moves the smi value to the destination register. |
| 1117 | void LoadSmiConstant(Register dst, Smi* value); |
| 1118 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1119 | // This handle will be patched with the code object on installation. |
| 1120 | Handle<Object> code_object_; |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1121 | |
| 1122 | // Helper functions for generating invokes. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1123 | template <typename LabelType> |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1124 | void InvokePrologue(const ParameterCount& expected, |
| 1125 | const ParameterCount& actual, |
| 1126 | Handle<Code> code_constant, |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1127 | Register code_register, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1128 | LabelType* done, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 1129 | InvokeFlag flag, |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 1130 | CallWrapper* call_wrapper); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1131 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1132 | // Activation support. |
| 1133 | void EnterFrame(StackFrame::Type type); |
| 1134 | void LeaveFrame(StackFrame::Type type); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1135 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 1136 | void EnterExitFramePrologue(bool save_rax); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1137 | |
| 1138 | // Allocates arg_stack_space * kPointerSize memory (not GCed) on the stack |
| 1139 | // accessible via StackSpaceOperand. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1140 | void EnterExitFrameEpilogue(int arg_stack_space, bool save_doubles); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1141 | |
| 1142 | void LeaveExitFrameEpilogue(); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 1143 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1144 | // Allocation support helpers. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1145 | // Loads the top of new-space into the result register. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1146 | // Otherwise the address of the new-space top is loaded into scratch (if |
| 1147 | // 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] | 1148 | void LoadAllocationTopHelper(Register result, |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1149 | Register scratch, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1150 | AllocationFlags flags); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1151 | // Update allocation top with value in result_end register. |
| 1152 | // 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] | 1153 | void UpdateAllocationTopHelper(Register result_end, Register scratch); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 1154 | |
| 1155 | // Helper for PopHandleScope. Allowed to perform a GC and returns |
| 1156 | // NULL if gc_allowed. Does not perform a GC if !gc_allowed, and |
| 1157 | // possibly returns a failure object indicating an allocation failure. |
| 1158 | Object* PopHandleScopeHelper(Register saved, |
| 1159 | Register scratch, |
| 1160 | bool gc_allowed); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 1161 | |
| 1162 | |
| 1163 | // Compute memory operands for safepoint stack slots. |
| 1164 | Operand SafepointRegisterSlot(Register reg); |
| 1165 | static int SafepointRegisterStackIndex(int reg_code) { |
| 1166 | return kNumSafepointRegisters - kSafepointPushRegisterIndices[reg_code] - 1; |
| 1167 | } |
| 1168 | |
| 1169 | // Needs access to SafepointRegisterStackIndex for optimized frame |
| 1170 | // traversal. |
| 1171 | friend class OptimizedFrame; |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1172 | }; |
| 1173 | |
| 1174 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1175 | // The code patcher is used to patch (typically) small parts of code e.g. for |
| 1176 | // debugging and other types of instrumentation. When using the code patcher |
| 1177 | // the exact number of bytes specified must be emitted. Is not legal to emit |
| 1178 | // relocation information. If any of these constraints are violated it causes |
| 1179 | // an assertion. |
| 1180 | class CodePatcher { |
| 1181 | public: |
| 1182 | CodePatcher(byte* address, int size); |
| 1183 | virtual ~CodePatcher(); |
| 1184 | |
| 1185 | // Macro assembler to emit code. |
| 1186 | MacroAssembler* masm() { return &masm_; } |
| 1187 | |
| 1188 | private: |
| 1189 | byte* address_; // The address of the code being patched. |
| 1190 | int size_; // Number of bytes of the expected patch size. |
| 1191 | MacroAssembler masm_; // Macro assembler used to generate the code. |
| 1192 | }; |
| 1193 | |
| 1194 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 1195 | // Helper class for generating code or data associated with the code |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 1196 | // right before or after a call instruction. As an example this can be used to |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 1197 | // generate safepoint data after calls for crankshaft. |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 1198 | class CallWrapper { |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 1199 | public: |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 1200 | CallWrapper() { } |
| 1201 | virtual ~CallWrapper() { } |
| 1202 | // Called just before emitting a call. Argument is the size of the generated |
| 1203 | // call code. |
| 1204 | virtual void BeforeCall(int call_size) = 0; |
| 1205 | // Called just after emitting a call, i.e., at the return site for the call. |
| 1206 | virtual void AfterCall() = 0; |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 1207 | }; |
| 1208 | |
| 1209 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1210 | // ----------------------------------------------------------------------------- |
| 1211 | // Static helper functions. |
| 1212 | |
| 1213 | // Generate an Operand for loading a field from an object. |
| 1214 | static inline Operand FieldOperand(Register object, int offset) { |
| 1215 | return Operand(object, offset - kHeapObjectTag); |
| 1216 | } |
| 1217 | |
| 1218 | |
| 1219 | // Generate an Operand for loading an indexed field from an object. |
| 1220 | static inline Operand FieldOperand(Register object, |
| 1221 | Register index, |
| 1222 | ScaleFactor scale, |
| 1223 | int offset) { |
| 1224 | return Operand(object, index, scale, offset - kHeapObjectTag); |
| 1225 | } |
| 1226 | |
| 1227 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1228 | static inline Operand ContextOperand(Register context, int index) { |
| 1229 | return Operand(context, Context::SlotOffset(index)); |
| 1230 | } |
| 1231 | |
| 1232 | |
| 1233 | static inline Operand GlobalObjectOperand() { |
| 1234 | return ContextOperand(rsi, Context::GLOBAL_INDEX); |
| 1235 | } |
| 1236 | |
| 1237 | |
| 1238 | // Provides access to exit frame stack space (not GCed). |
| 1239 | static inline Operand StackSpaceOperand(int index) { |
| 1240 | #ifdef _WIN64 |
| 1241 | const int kShaddowSpace = 4; |
| 1242 | return Operand(rsp, (index + kShaddowSpace) * kPointerSize); |
| 1243 | #else |
| 1244 | return Operand(rsp, index * kPointerSize); |
| 1245 | #endif |
| 1246 | } |
| 1247 | |
| 1248 | |
| 1249 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1250 | #ifdef GENERATED_CODE_COVERAGE |
| 1251 | extern void LogGeneratedCodeCoverage(const char* file_line); |
| 1252 | #define CODE_COVERAGE_STRINGIFY(x) #x |
| 1253 | #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x) |
| 1254 | #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__) |
| 1255 | #define ACCESS_MASM(masm) { \ |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1256 | byte* x64_coverage_function = \ |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1257 | reinterpret_cast<byte*>(FUNCTION_ADDR(LogGeneratedCodeCoverage)); \ |
| 1258 | masm->pushfd(); \ |
| 1259 | masm->pushad(); \ |
| 1260 | masm->push(Immediate(reinterpret_cast<int>(&__FILE_LINE__))); \ |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1261 | masm->call(x64_coverage_function, RelocInfo::RUNTIME_ENTRY); \ |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1262 | masm->pop(rax); \ |
| 1263 | masm->popad(); \ |
| 1264 | masm->popfd(); \ |
| 1265 | } \ |
| 1266 | masm-> |
| 1267 | #else |
| 1268 | #define ACCESS_MASM(masm) masm-> |
| 1269 | #endif |
| 1270 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1271 | // ----------------------------------------------------------------------------- |
| 1272 | // Template implementations. |
| 1273 | |
| 1274 | static int kSmiShift = kSmiTagSize + kSmiShiftSize; |
| 1275 | |
| 1276 | |
| 1277 | template <typename LabelType> |
| 1278 | void MacroAssembler::SmiNeg(Register dst, |
| 1279 | Register src, |
| 1280 | LabelType* on_smi_result) { |
| 1281 | if (dst.is(src)) { |
| 1282 | ASSERT(!dst.is(kScratchRegister)); |
| 1283 | movq(kScratchRegister, src); |
| 1284 | neg(dst); // Low 32 bits are retained as zero by negation. |
| 1285 | // Test if result is zero or Smi::kMinValue. |
| 1286 | cmpq(dst, kScratchRegister); |
| 1287 | j(not_equal, on_smi_result); |
| 1288 | movq(src, kScratchRegister); |
| 1289 | } else { |
| 1290 | movq(dst, src); |
| 1291 | neg(dst); |
| 1292 | cmpq(dst, src); |
| 1293 | // If the result is zero or Smi::kMinValue, negation failed to create a smi. |
| 1294 | j(not_equal, on_smi_result); |
| 1295 | } |
| 1296 | } |
| 1297 | |
| 1298 | |
| 1299 | template <typename LabelType> |
| 1300 | void MacroAssembler::SmiAdd(Register dst, |
| 1301 | Register src1, |
| 1302 | Register src2, |
| 1303 | LabelType* on_not_smi_result) { |
| 1304 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1305 | ASSERT(!dst.is(src2)); |
| 1306 | if (dst.is(src1)) { |
| 1307 | movq(kScratchRegister, src1); |
| 1308 | addq(kScratchRegister, src2); |
| 1309 | j(overflow, on_not_smi_result); |
| 1310 | movq(dst, kScratchRegister); |
| 1311 | } else { |
| 1312 | movq(dst, src1); |
| 1313 | addq(dst, src2); |
| 1314 | j(overflow, on_not_smi_result); |
| 1315 | } |
| 1316 | } |
| 1317 | |
| 1318 | |
| 1319 | template <typename LabelType> |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1320 | void MacroAssembler::SmiAdd(Register dst, |
| 1321 | Register src1, |
| 1322 | const Operand& src2, |
| 1323 | LabelType* on_not_smi_result) { |
| 1324 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1325 | if (dst.is(src1)) { |
| 1326 | movq(kScratchRegister, src1); |
| 1327 | addq(kScratchRegister, src2); |
| 1328 | j(overflow, on_not_smi_result); |
| 1329 | movq(dst, kScratchRegister); |
| 1330 | } else { |
| 1331 | ASSERT(!src2.AddressUsesRegister(dst)); |
| 1332 | movq(dst, src1); |
| 1333 | addq(dst, src2); |
| 1334 | j(overflow, on_not_smi_result); |
| 1335 | } |
| 1336 | } |
| 1337 | |
| 1338 | |
| 1339 | template <typename LabelType> |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1340 | void MacroAssembler::SmiSub(Register dst, |
| 1341 | Register src1, |
| 1342 | Register src2, |
| 1343 | LabelType* on_not_smi_result) { |
| 1344 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1345 | ASSERT(!dst.is(src2)); |
| 1346 | if (dst.is(src1)) { |
| 1347 | cmpq(dst, src2); |
| 1348 | j(overflow, on_not_smi_result); |
| 1349 | subq(dst, src2); |
| 1350 | } else { |
| 1351 | movq(dst, src1); |
| 1352 | subq(dst, src2); |
| 1353 | j(overflow, on_not_smi_result); |
| 1354 | } |
| 1355 | } |
| 1356 | |
| 1357 | |
| 1358 | template <typename LabelType> |
| 1359 | void MacroAssembler::SmiSub(Register dst, |
| 1360 | Register src1, |
| 1361 | const Operand& src2, |
| 1362 | LabelType* on_not_smi_result) { |
| 1363 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1364 | if (dst.is(src1)) { |
| 1365 | movq(kScratchRegister, src2); |
| 1366 | cmpq(src1, kScratchRegister); |
| 1367 | j(overflow, on_not_smi_result); |
| 1368 | subq(src1, kScratchRegister); |
| 1369 | } else { |
| 1370 | movq(dst, src1); |
| 1371 | subq(dst, src2); |
| 1372 | j(overflow, on_not_smi_result); |
| 1373 | } |
| 1374 | } |
| 1375 | |
| 1376 | |
| 1377 | template <typename LabelType> |
| 1378 | void MacroAssembler::SmiMul(Register dst, |
| 1379 | Register src1, |
| 1380 | Register src2, |
| 1381 | LabelType* on_not_smi_result) { |
| 1382 | ASSERT(!dst.is(src2)); |
| 1383 | ASSERT(!dst.is(kScratchRegister)); |
| 1384 | ASSERT(!src1.is(kScratchRegister)); |
| 1385 | ASSERT(!src2.is(kScratchRegister)); |
| 1386 | |
| 1387 | if (dst.is(src1)) { |
| 1388 | NearLabel failure, zero_correct_result; |
| 1389 | movq(kScratchRegister, src1); // Create backup for later testing. |
| 1390 | SmiToInteger64(dst, src1); |
| 1391 | imul(dst, src2); |
| 1392 | j(overflow, &failure); |
| 1393 | |
| 1394 | // Check for negative zero result. If product is zero, and one |
| 1395 | // argument is negative, go to slow case. |
| 1396 | NearLabel correct_result; |
| 1397 | testq(dst, dst); |
| 1398 | j(not_zero, &correct_result); |
| 1399 | |
| 1400 | movq(dst, kScratchRegister); |
| 1401 | xor_(dst, src2); |
| 1402 | j(positive, &zero_correct_result); // Result was positive zero. |
| 1403 | |
| 1404 | bind(&failure); // Reused failure exit, restores src1. |
| 1405 | movq(src1, kScratchRegister); |
| 1406 | jmp(on_not_smi_result); |
| 1407 | |
| 1408 | bind(&zero_correct_result); |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1409 | Set(dst, 0); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1410 | |
| 1411 | bind(&correct_result); |
| 1412 | } else { |
| 1413 | SmiToInteger64(dst, src1); |
| 1414 | imul(dst, src2); |
| 1415 | j(overflow, on_not_smi_result); |
| 1416 | // Check for negative zero result. If product is zero, and one |
| 1417 | // argument is negative, go to slow case. |
| 1418 | NearLabel correct_result; |
| 1419 | testq(dst, dst); |
| 1420 | j(not_zero, &correct_result); |
| 1421 | // One of src1 and src2 is zero, the check whether the other is |
| 1422 | // negative. |
| 1423 | movq(kScratchRegister, src1); |
| 1424 | xor_(kScratchRegister, src2); |
| 1425 | j(negative, on_not_smi_result); |
| 1426 | bind(&correct_result); |
| 1427 | } |
| 1428 | } |
| 1429 | |
| 1430 | |
| 1431 | template <typename LabelType> |
| 1432 | void MacroAssembler::SmiTryAddConstant(Register dst, |
| 1433 | Register src, |
| 1434 | Smi* constant, |
| 1435 | LabelType* on_not_smi_result) { |
| 1436 | // Does not assume that src is a smi. |
| 1437 | ASSERT_EQ(static_cast<int>(1), static_cast<int>(kSmiTagMask)); |
| 1438 | ASSERT_EQ(0, kSmiTag); |
| 1439 | ASSERT(!dst.is(kScratchRegister)); |
| 1440 | ASSERT(!src.is(kScratchRegister)); |
| 1441 | |
| 1442 | JumpIfNotSmi(src, on_not_smi_result); |
| 1443 | Register tmp = (dst.is(src) ? kScratchRegister : dst); |
| 1444 | LoadSmiConstant(tmp, constant); |
| 1445 | addq(tmp, src); |
| 1446 | j(overflow, on_not_smi_result); |
| 1447 | if (dst.is(src)) { |
| 1448 | movq(dst, tmp); |
| 1449 | } |
| 1450 | } |
| 1451 | |
| 1452 | |
| 1453 | template <typename LabelType> |
| 1454 | void MacroAssembler::SmiAddConstant(Register dst, |
| 1455 | Register src, |
| 1456 | Smi* constant, |
| 1457 | LabelType* on_not_smi_result) { |
| 1458 | if (constant->value() == 0) { |
| 1459 | if (!dst.is(src)) { |
| 1460 | movq(dst, src); |
| 1461 | } |
| 1462 | } else if (dst.is(src)) { |
| 1463 | ASSERT(!dst.is(kScratchRegister)); |
| 1464 | |
| 1465 | LoadSmiConstant(kScratchRegister, constant); |
| 1466 | addq(kScratchRegister, src); |
| 1467 | j(overflow, on_not_smi_result); |
| 1468 | movq(dst, kScratchRegister); |
| 1469 | } else { |
| 1470 | LoadSmiConstant(dst, constant); |
| 1471 | addq(dst, src); |
| 1472 | j(overflow, on_not_smi_result); |
| 1473 | } |
| 1474 | } |
| 1475 | |
| 1476 | |
| 1477 | template <typename LabelType> |
| 1478 | void MacroAssembler::SmiSubConstant(Register dst, |
| 1479 | Register src, |
| 1480 | Smi* constant, |
| 1481 | LabelType* on_not_smi_result) { |
| 1482 | if (constant->value() == 0) { |
| 1483 | if (!dst.is(src)) { |
| 1484 | movq(dst, src); |
| 1485 | } |
| 1486 | } else if (dst.is(src)) { |
| 1487 | ASSERT(!dst.is(kScratchRegister)); |
| 1488 | if (constant->value() == Smi::kMinValue) { |
| 1489 | // Subtracting min-value from any non-negative value will overflow. |
| 1490 | // We test the non-negativeness before doing the subtraction. |
| 1491 | testq(src, src); |
| 1492 | j(not_sign, on_not_smi_result); |
| 1493 | LoadSmiConstant(kScratchRegister, constant); |
| 1494 | subq(dst, kScratchRegister); |
| 1495 | } else { |
| 1496 | // Subtract by adding the negation. |
| 1497 | LoadSmiConstant(kScratchRegister, Smi::FromInt(-constant->value())); |
| 1498 | addq(kScratchRegister, dst); |
| 1499 | j(overflow, on_not_smi_result); |
| 1500 | movq(dst, kScratchRegister); |
| 1501 | } |
| 1502 | } else { |
| 1503 | if (constant->value() == Smi::kMinValue) { |
| 1504 | // Subtracting min-value from any non-negative value will overflow. |
| 1505 | // We test the non-negativeness before doing the subtraction. |
| 1506 | testq(src, src); |
| 1507 | j(not_sign, on_not_smi_result); |
| 1508 | LoadSmiConstant(dst, constant); |
| 1509 | // Adding and subtracting the min-value gives the same result, it only |
| 1510 | // differs on the overflow bit, which we don't check here. |
| 1511 | addq(dst, src); |
| 1512 | } else { |
| 1513 | // Subtract by adding the negation. |
| 1514 | LoadSmiConstant(dst, Smi::FromInt(-(constant->value()))); |
| 1515 | addq(dst, src); |
| 1516 | j(overflow, on_not_smi_result); |
| 1517 | } |
| 1518 | } |
| 1519 | } |
| 1520 | |
| 1521 | |
| 1522 | template <typename LabelType> |
| 1523 | void MacroAssembler::SmiDiv(Register dst, |
| 1524 | Register src1, |
| 1525 | Register src2, |
| 1526 | LabelType* on_not_smi_result) { |
| 1527 | ASSERT(!src1.is(kScratchRegister)); |
| 1528 | ASSERT(!src2.is(kScratchRegister)); |
| 1529 | ASSERT(!dst.is(kScratchRegister)); |
| 1530 | ASSERT(!src2.is(rax)); |
| 1531 | ASSERT(!src2.is(rdx)); |
| 1532 | ASSERT(!src1.is(rdx)); |
| 1533 | |
| 1534 | // Check for 0 divisor (result is +/-Infinity). |
| 1535 | NearLabel positive_divisor; |
| 1536 | testq(src2, src2); |
| 1537 | j(zero, on_not_smi_result); |
| 1538 | |
| 1539 | if (src1.is(rax)) { |
| 1540 | movq(kScratchRegister, src1); |
| 1541 | } |
| 1542 | SmiToInteger32(rax, src1); |
| 1543 | // We need to rule out dividing Smi::kMinValue by -1, since that would |
| 1544 | // overflow in idiv and raise an exception. |
| 1545 | // We combine this with negative zero test (negative zero only happens |
| 1546 | // when dividing zero by a negative number). |
| 1547 | |
| 1548 | // We overshoot a little and go to slow case if we divide min-value |
| 1549 | // by any negative value, not just -1. |
| 1550 | NearLabel safe_div; |
| 1551 | testl(rax, Immediate(0x7fffffff)); |
| 1552 | j(not_zero, &safe_div); |
| 1553 | testq(src2, src2); |
| 1554 | if (src1.is(rax)) { |
| 1555 | j(positive, &safe_div); |
| 1556 | movq(src1, kScratchRegister); |
| 1557 | jmp(on_not_smi_result); |
| 1558 | } else { |
| 1559 | j(negative, on_not_smi_result); |
| 1560 | } |
| 1561 | bind(&safe_div); |
| 1562 | |
| 1563 | SmiToInteger32(src2, src2); |
| 1564 | // Sign extend src1 into edx:eax. |
| 1565 | cdq(); |
| 1566 | idivl(src2); |
| 1567 | Integer32ToSmi(src2, src2); |
| 1568 | // Check that the remainder is zero. |
| 1569 | testl(rdx, rdx); |
| 1570 | if (src1.is(rax)) { |
| 1571 | NearLabel smi_result; |
| 1572 | j(zero, &smi_result); |
| 1573 | movq(src1, kScratchRegister); |
| 1574 | jmp(on_not_smi_result); |
| 1575 | bind(&smi_result); |
| 1576 | } else { |
| 1577 | j(not_zero, on_not_smi_result); |
| 1578 | } |
| 1579 | if (!dst.is(src1) && src1.is(rax)) { |
| 1580 | movq(src1, kScratchRegister); |
| 1581 | } |
| 1582 | Integer32ToSmi(dst, rax); |
| 1583 | } |
| 1584 | |
| 1585 | |
| 1586 | template <typename LabelType> |
| 1587 | void MacroAssembler::SmiMod(Register dst, |
| 1588 | Register src1, |
| 1589 | Register src2, |
| 1590 | LabelType* on_not_smi_result) { |
| 1591 | ASSERT(!dst.is(kScratchRegister)); |
| 1592 | ASSERT(!src1.is(kScratchRegister)); |
| 1593 | ASSERT(!src2.is(kScratchRegister)); |
| 1594 | ASSERT(!src2.is(rax)); |
| 1595 | ASSERT(!src2.is(rdx)); |
| 1596 | ASSERT(!src1.is(rdx)); |
| 1597 | ASSERT(!src1.is(src2)); |
| 1598 | |
| 1599 | testq(src2, src2); |
| 1600 | j(zero, on_not_smi_result); |
| 1601 | |
| 1602 | if (src1.is(rax)) { |
| 1603 | movq(kScratchRegister, src1); |
| 1604 | } |
| 1605 | SmiToInteger32(rax, src1); |
| 1606 | SmiToInteger32(src2, src2); |
| 1607 | |
| 1608 | // Test for the edge case of dividing Smi::kMinValue by -1 (will overflow). |
| 1609 | NearLabel safe_div; |
| 1610 | cmpl(rax, Immediate(Smi::kMinValue)); |
| 1611 | j(not_equal, &safe_div); |
| 1612 | cmpl(src2, Immediate(-1)); |
| 1613 | j(not_equal, &safe_div); |
| 1614 | // Retag inputs and go slow case. |
| 1615 | Integer32ToSmi(src2, src2); |
| 1616 | if (src1.is(rax)) { |
| 1617 | movq(src1, kScratchRegister); |
| 1618 | } |
| 1619 | jmp(on_not_smi_result); |
| 1620 | bind(&safe_div); |
| 1621 | |
| 1622 | // Sign extend eax into edx:eax. |
| 1623 | cdq(); |
| 1624 | idivl(src2); |
| 1625 | // Restore smi tags on inputs. |
| 1626 | Integer32ToSmi(src2, src2); |
| 1627 | if (src1.is(rax)) { |
| 1628 | movq(src1, kScratchRegister); |
| 1629 | } |
| 1630 | // Check for a negative zero result. If the result is zero, and the |
| 1631 | // dividend is negative, go slow to return a floating point negative zero. |
| 1632 | NearLabel smi_result; |
| 1633 | testl(rdx, rdx); |
| 1634 | j(not_zero, &smi_result); |
| 1635 | testq(src1, src1); |
| 1636 | j(negative, on_not_smi_result); |
| 1637 | bind(&smi_result); |
| 1638 | Integer32ToSmi(dst, rdx); |
| 1639 | } |
| 1640 | |
| 1641 | |
| 1642 | template <typename LabelType> |
| 1643 | void MacroAssembler::SmiShiftLogicalRightConstant( |
| 1644 | Register dst, Register src, int shift_value, LabelType* on_not_smi_result) { |
| 1645 | // Logic right shift interprets its result as an *unsigned* number. |
| 1646 | if (dst.is(src)) { |
| 1647 | UNIMPLEMENTED(); // Not used. |
| 1648 | } else { |
| 1649 | movq(dst, src); |
| 1650 | if (shift_value == 0) { |
| 1651 | testq(dst, dst); |
| 1652 | j(negative, on_not_smi_result); |
| 1653 | } |
| 1654 | shr(dst, Immediate(shift_value + kSmiShift)); |
| 1655 | shl(dst, Immediate(kSmiShift)); |
| 1656 | } |
| 1657 | } |
| 1658 | |
| 1659 | |
| 1660 | template <typename LabelType> |
| 1661 | void MacroAssembler::SmiShiftLogicalRight(Register dst, |
| 1662 | Register src1, |
| 1663 | Register src2, |
| 1664 | LabelType* on_not_smi_result) { |
| 1665 | ASSERT(!dst.is(kScratchRegister)); |
| 1666 | ASSERT(!src1.is(kScratchRegister)); |
| 1667 | ASSERT(!src2.is(kScratchRegister)); |
| 1668 | ASSERT(!dst.is(rcx)); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1669 | // dst and src1 can be the same, because the one case that bails out |
| 1670 | // is a shift by 0, which leaves dst, and therefore src1, unchanged. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1671 | NearLabel result_ok; |
| 1672 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1673 | movq(kScratchRegister, rcx); |
| 1674 | } |
| 1675 | if (!dst.is(src1)) { |
| 1676 | movq(dst, src1); |
| 1677 | } |
| 1678 | SmiToInteger32(rcx, src2); |
| 1679 | orl(rcx, Immediate(kSmiShift)); |
| 1680 | shr_cl(dst); // Shift is rcx modulo 0x1f + 32. |
| 1681 | shl(dst, Immediate(kSmiShift)); |
| 1682 | testq(dst, dst); |
| 1683 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1684 | NearLabel positive_result; |
| 1685 | j(positive, &positive_result); |
| 1686 | if (src1.is(rcx)) { |
| 1687 | movq(src1, kScratchRegister); |
| 1688 | } else { |
| 1689 | movq(src2, kScratchRegister); |
| 1690 | } |
| 1691 | jmp(on_not_smi_result); |
| 1692 | bind(&positive_result); |
| 1693 | } else { |
| 1694 | j(negative, on_not_smi_result); // src2 was zero and src1 negative. |
| 1695 | } |
| 1696 | } |
| 1697 | |
| 1698 | |
| 1699 | template <typename LabelType> |
| 1700 | void MacroAssembler::SelectNonSmi(Register dst, |
| 1701 | Register src1, |
| 1702 | Register src2, |
| 1703 | LabelType* on_not_smis) { |
| 1704 | ASSERT(!dst.is(kScratchRegister)); |
| 1705 | ASSERT(!src1.is(kScratchRegister)); |
| 1706 | ASSERT(!src2.is(kScratchRegister)); |
| 1707 | ASSERT(!dst.is(src1)); |
| 1708 | ASSERT(!dst.is(src2)); |
| 1709 | // Both operands must not be smis. |
| 1710 | #ifdef DEBUG |
| 1711 | if (allow_stub_calls()) { // Check contains a stub call. |
| 1712 | Condition not_both_smis = NegateCondition(CheckBothSmi(src1, src2)); |
| 1713 | Check(not_both_smis, "Both registers were smis in SelectNonSmi."); |
| 1714 | } |
| 1715 | #endif |
| 1716 | ASSERT_EQ(0, kSmiTag); |
| 1717 | ASSERT_EQ(0, Smi::FromInt(0)); |
| 1718 | movl(kScratchRegister, Immediate(kSmiTagMask)); |
| 1719 | and_(kScratchRegister, src1); |
| 1720 | testl(kScratchRegister, src2); |
| 1721 | // If non-zero then both are smis. |
| 1722 | j(not_zero, on_not_smis); |
| 1723 | |
| 1724 | // Exactly one operand is a smi. |
| 1725 | ASSERT_EQ(1, static_cast<int>(kSmiTagMask)); |
| 1726 | // kScratchRegister still holds src1 & kSmiTag, which is either zero or one. |
| 1727 | subq(kScratchRegister, Immediate(1)); |
| 1728 | // If src1 is a smi, then scratch register all 1s, else it is all 0s. |
| 1729 | movq(dst, src1); |
| 1730 | xor_(dst, src2); |
| 1731 | and_(dst, kScratchRegister); |
| 1732 | // If src1 is a smi, dst holds src1 ^ src2, else it is zero. |
| 1733 | xor_(dst, src1); |
| 1734 | // If src1 is a smi, dst is src2, else it is src1, i.e., the non-smi. |
| 1735 | } |
| 1736 | |
| 1737 | |
| 1738 | template <typename LabelType> |
| 1739 | void MacroAssembler::JumpIfSmi(Register src, LabelType* on_smi) { |
| 1740 | ASSERT_EQ(0, kSmiTag); |
| 1741 | Condition smi = CheckSmi(src); |
| 1742 | j(smi, on_smi); |
| 1743 | } |
| 1744 | |
| 1745 | |
| 1746 | template <typename LabelType> |
| 1747 | void MacroAssembler::JumpIfNotSmi(Register src, LabelType* on_not_smi) { |
| 1748 | Condition smi = CheckSmi(src); |
| 1749 | j(NegateCondition(smi), on_not_smi); |
| 1750 | } |
| 1751 | |
| 1752 | |
| 1753 | template <typename LabelType> |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1754 | void MacroAssembler::JumpUnlessNonNegativeSmi( |
| 1755 | Register src, LabelType* on_not_smi_or_negative) { |
| 1756 | Condition non_negative_smi = CheckNonNegativeSmi(src); |
| 1757 | j(NegateCondition(non_negative_smi), on_not_smi_or_negative); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1758 | } |
| 1759 | |
| 1760 | |
| 1761 | template <typename LabelType> |
| 1762 | void MacroAssembler::JumpIfSmiEqualsConstant(Register src, |
| 1763 | Smi* constant, |
| 1764 | LabelType* on_equals) { |
| 1765 | SmiCompare(src, constant); |
| 1766 | j(equal, on_equals); |
| 1767 | } |
| 1768 | |
| 1769 | |
| 1770 | template <typename LabelType> |
| 1771 | void MacroAssembler::JumpIfNotValidSmiValue(Register src, |
| 1772 | LabelType* on_invalid) { |
| 1773 | Condition is_valid = CheckInteger32ValidSmiValue(src); |
| 1774 | j(NegateCondition(is_valid), on_invalid); |
| 1775 | } |
| 1776 | |
| 1777 | |
| 1778 | template <typename LabelType> |
| 1779 | void MacroAssembler::JumpIfUIntNotValidSmiValue(Register src, |
| 1780 | LabelType* on_invalid) { |
| 1781 | Condition is_valid = CheckUInteger32ValidSmiValue(src); |
| 1782 | j(NegateCondition(is_valid), on_invalid); |
| 1783 | } |
| 1784 | |
| 1785 | |
| 1786 | template <typename LabelType> |
| 1787 | void MacroAssembler::JumpIfNotBothSmi(Register src1, |
| 1788 | Register src2, |
| 1789 | LabelType* on_not_both_smi) { |
| 1790 | Condition both_smi = CheckBothSmi(src1, src2); |
| 1791 | j(NegateCondition(both_smi), on_not_both_smi); |
| 1792 | } |
| 1793 | |
| 1794 | |
| 1795 | template <typename LabelType> |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1796 | void MacroAssembler::JumpUnlessBothNonNegativeSmi(Register src1, |
| 1797 | Register src2, |
| 1798 | LabelType* on_not_both_smi) { |
| 1799 | Condition both_smi = CheckBothNonNegativeSmi(src1, src2); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1800 | j(NegateCondition(both_smi), on_not_both_smi); |
| 1801 | } |
| 1802 | |
| 1803 | |
| 1804 | template <typename LabelType> |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 1805 | void MacroAssembler::SmiOrIfSmis(Register dst, Register src1, Register src2, |
| 1806 | LabelType* on_not_smis) { |
| 1807 | if (dst.is(src1) || dst.is(src2)) { |
| 1808 | ASSERT(!src1.is(kScratchRegister)); |
| 1809 | ASSERT(!src2.is(kScratchRegister)); |
| 1810 | movq(kScratchRegister, src1); |
| 1811 | or_(kScratchRegister, src2); |
| 1812 | JumpIfNotSmi(kScratchRegister, on_not_smis); |
| 1813 | movq(dst, kScratchRegister); |
| 1814 | } else { |
| 1815 | movq(dst, src1); |
| 1816 | or_(dst, src2); |
| 1817 | JumpIfNotSmi(dst, on_not_smis); |
| 1818 | } |
| 1819 | } |
| 1820 | |
| 1821 | |
| 1822 | template <typename LabelType> |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1823 | void MacroAssembler::JumpIfNotString(Register object, |
| 1824 | Register object_map, |
| 1825 | LabelType* not_string) { |
| 1826 | Condition is_smi = CheckSmi(object); |
| 1827 | j(is_smi, not_string); |
| 1828 | CmpObjectType(object, FIRST_NONSTRING_TYPE, object_map); |
| 1829 | j(above_equal, not_string); |
| 1830 | } |
| 1831 | |
| 1832 | |
| 1833 | template <typename LabelType> |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1834 | void MacroAssembler::JumpIfNotBothSequentialAsciiStrings(Register first_object, |
| 1835 | Register second_object, |
| 1836 | Register scratch1, |
| 1837 | Register scratch2, |
| 1838 | LabelType* on_fail) { |
| 1839 | // Check that both objects are not smis. |
| 1840 | Condition either_smi = CheckEitherSmi(first_object, second_object); |
| 1841 | j(either_smi, on_fail); |
| 1842 | |
| 1843 | // Load instance type for both strings. |
| 1844 | movq(scratch1, FieldOperand(first_object, HeapObject::kMapOffset)); |
| 1845 | movq(scratch2, FieldOperand(second_object, HeapObject::kMapOffset)); |
| 1846 | movzxbl(scratch1, FieldOperand(scratch1, Map::kInstanceTypeOffset)); |
| 1847 | movzxbl(scratch2, FieldOperand(scratch2, Map::kInstanceTypeOffset)); |
| 1848 | |
| 1849 | // Check that both are flat ascii strings. |
| 1850 | ASSERT(kNotStringTag != 0); |
| 1851 | const int kFlatAsciiStringMask = |
| 1852 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 1853 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 1854 | |
| 1855 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 1856 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 1857 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 1858 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 1859 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 1860 | cmpl(scratch1, |
| 1861 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 1862 | j(not_equal, on_fail); |
| 1863 | } |
| 1864 | |
| 1865 | |
| 1866 | template <typename LabelType> |
| 1867 | void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii( |
| 1868 | Register instance_type, |
| 1869 | Register scratch, |
| 1870 | LabelType *failure) { |
| 1871 | if (!scratch.is(instance_type)) { |
| 1872 | movl(scratch, instance_type); |
| 1873 | } |
| 1874 | |
| 1875 | const int kFlatAsciiStringMask = |
| 1876 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 1877 | |
| 1878 | andl(scratch, Immediate(kFlatAsciiStringMask)); |
| 1879 | cmpl(scratch, Immediate(kStringTag | kSeqStringTag | kAsciiStringTag)); |
| 1880 | j(not_equal, failure); |
| 1881 | } |
| 1882 | |
| 1883 | |
| 1884 | template <typename LabelType> |
| 1885 | void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii( |
| 1886 | Register first_object_instance_type, |
| 1887 | Register second_object_instance_type, |
| 1888 | Register scratch1, |
| 1889 | Register scratch2, |
| 1890 | LabelType* on_fail) { |
| 1891 | // Load instance type for both strings. |
| 1892 | movq(scratch1, first_object_instance_type); |
| 1893 | movq(scratch2, second_object_instance_type); |
| 1894 | |
| 1895 | // Check that both are flat ascii strings. |
| 1896 | ASSERT(kNotStringTag != 0); |
| 1897 | const int kFlatAsciiStringMask = |
| 1898 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 1899 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 1900 | |
| 1901 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 1902 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 1903 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 1904 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 1905 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 1906 | cmpl(scratch1, |
| 1907 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 1908 | j(not_equal, on_fail); |
| 1909 | } |
| 1910 | |
| 1911 | |
| 1912 | template <typename LabelType> |
| 1913 | void MacroAssembler::InNewSpace(Register object, |
| 1914 | Register scratch, |
| 1915 | Condition cc, |
| 1916 | LabelType* branch) { |
| 1917 | if (Serializer::enabled()) { |
| 1918 | // Can't do arithmetic on external references if it might get serialized. |
| 1919 | // The mask isn't really an address. We load it as an external reference in |
| 1920 | // case the size of the new space is different between the snapshot maker |
| 1921 | // and the running system. |
| 1922 | if (scratch.is(object)) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1923 | movq(kScratchRegister, ExternalReference::new_space_mask(isolate())); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1924 | and_(scratch, kScratchRegister); |
| 1925 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1926 | movq(scratch, ExternalReference::new_space_mask(isolate())); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1927 | and_(scratch, object); |
| 1928 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1929 | movq(kScratchRegister, ExternalReference::new_space_start(isolate())); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1930 | cmpq(scratch, kScratchRegister); |
| 1931 | j(cc, branch); |
| 1932 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1933 | ASSERT(is_int32(static_cast<int64_t>(HEAP->NewSpaceMask()))); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1934 | intptr_t new_space_start = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1935 | reinterpret_cast<intptr_t>(HEAP->NewSpaceStart()); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1936 | movq(kScratchRegister, -new_space_start, RelocInfo::NONE); |
| 1937 | if (scratch.is(object)) { |
| 1938 | addq(scratch, kScratchRegister); |
| 1939 | } else { |
| 1940 | lea(scratch, Operand(object, kScratchRegister, times_1, 0)); |
| 1941 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1942 | and_(scratch, Immediate(static_cast<int32_t>(HEAP->NewSpaceMask()))); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1943 | j(cc, branch); |
| 1944 | } |
| 1945 | } |
| 1946 | |
| 1947 | |
| 1948 | template <typename LabelType> |
| 1949 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 1950 | const ParameterCount& actual, |
| 1951 | Handle<Code> code_constant, |
| 1952 | Register code_register, |
| 1953 | LabelType* done, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 1954 | InvokeFlag flag, |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 1955 | CallWrapper* call_wrapper) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1956 | bool definitely_matches = false; |
| 1957 | NearLabel invoke; |
| 1958 | if (expected.is_immediate()) { |
| 1959 | ASSERT(actual.is_immediate()); |
| 1960 | if (expected.immediate() == actual.immediate()) { |
| 1961 | definitely_matches = true; |
| 1962 | } else { |
| 1963 | Set(rax, actual.immediate()); |
| 1964 | if (expected.immediate() == |
| 1965 | SharedFunctionInfo::kDontAdaptArgumentsSentinel) { |
| 1966 | // Don't worry about adapting arguments for built-ins that |
| 1967 | // don't want that done. Skip adaption code by making it look |
| 1968 | // like we have a match between expected and actual number of |
| 1969 | // arguments. |
| 1970 | definitely_matches = true; |
| 1971 | } else { |
| 1972 | Set(rbx, expected.immediate()); |
| 1973 | } |
| 1974 | } |
| 1975 | } else { |
| 1976 | if (actual.is_immediate()) { |
| 1977 | // Expected is in register, actual is immediate. This is the |
| 1978 | // case when we invoke function values without going through the |
| 1979 | // IC mechanism. |
| 1980 | cmpq(expected.reg(), Immediate(actual.immediate())); |
| 1981 | j(equal, &invoke); |
| 1982 | ASSERT(expected.reg().is(rbx)); |
| 1983 | Set(rax, actual.immediate()); |
| 1984 | } else if (!expected.reg().is(actual.reg())) { |
| 1985 | // Both expected and actual are in (different) registers. This |
| 1986 | // is the case when we invoke functions using call and apply. |
| 1987 | cmpq(expected.reg(), actual.reg()); |
| 1988 | j(equal, &invoke); |
| 1989 | ASSERT(actual.reg().is(rax)); |
| 1990 | ASSERT(expected.reg().is(rbx)); |
| 1991 | } |
| 1992 | } |
| 1993 | |
| 1994 | if (!definitely_matches) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1995 | Handle<Code> adaptor = isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1996 | if (!code_constant.is_null()) { |
| 1997 | movq(rdx, code_constant, RelocInfo::EMBEDDED_OBJECT); |
| 1998 | addq(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 1999 | } else if (!code_register.is(rdx)) { |
| 2000 | movq(rdx, code_register); |
| 2001 | } |
| 2002 | |
| 2003 | if (flag == CALL_FUNCTION) { |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2004 | if (call_wrapper != NULL) call_wrapper->BeforeCall(CallSize(adaptor)); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 2005 | Call(adaptor, RelocInfo::CODE_TARGET); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2006 | if (call_wrapper != NULL) call_wrapper->AfterCall(); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 2007 | jmp(done); |
| 2008 | } else { |
| 2009 | Jump(adaptor, RelocInfo::CODE_TARGET); |
| 2010 | } |
| 2011 | bind(&invoke); |
| 2012 | } |
| 2013 | } |
| 2014 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 2015 | |
| 2016 | } } // namespace v8::internal |
| 2017 | |
| 2018 | #endif // V8_X64_MACRO_ASSEMBLER_X64_H_ |