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