Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2009 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 29 | |
| 30 | #if defined(V8_TARGET_ARCH_X64) |
| 31 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 32 | #include "codegen-inl.h" |
| 33 | #include "macro-assembler.h" |
| 34 | |
| 35 | namespace v8 { |
| 36 | namespace internal { |
| 37 | |
| 38 | #define __ ACCESS_MASM(masm) |
| 39 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 40 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 41 | void Builtins::Generate_Adaptor(MacroAssembler* masm, |
| 42 | CFunctionId id, |
| 43 | BuiltinExtraArguments extra_args) { |
| 44 | // ----------- S t a t e ------------- |
| 45 | // -- rax : number of arguments excluding receiver |
| 46 | // -- rdi : called function (only guaranteed when |
| 47 | // extra_args requires it) |
| 48 | // -- rsi : context |
| 49 | // -- rsp[0] : return address |
| 50 | // -- rsp[8] : last argument |
| 51 | // -- ... |
| 52 | // -- rsp[8 * argc] : first argument (argc == rax) |
| 53 | // -- rsp[8 * (argc +1)] : receiver |
| 54 | // ----------------------------------- |
| 55 | |
| 56 | // Insert extra arguments. |
| 57 | int num_extra_args = 0; |
| 58 | if (extra_args == NEEDS_CALLED_FUNCTION) { |
| 59 | num_extra_args = 1; |
| 60 | __ pop(kScratchRegister); // Save return address. |
| 61 | __ push(rdi); |
| 62 | __ push(kScratchRegister); // Restore return address. |
| 63 | } else { |
| 64 | ASSERT(extra_args == NO_EXTRA_ARGUMENTS); |
| 65 | } |
| 66 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 67 | // JumpToExternalReference expects rax to contain the number of arguments |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 68 | // including the receiver and the extra arguments. |
| 69 | __ addq(rax, Immediate(num_extra_args + 1)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 70 | __ JumpToExternalReference(ExternalReference(id), 1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | |
| 74 | static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { |
| 75 | __ push(rbp); |
| 76 | __ movq(rbp, rsp); |
| 77 | |
| 78 | // Store the arguments adaptor context sentinel. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 79 | __ Push(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 80 | |
| 81 | // Push the function on the stack. |
| 82 | __ push(rdi); |
| 83 | |
| 84 | // Preserve the number of arguments on the stack. Must preserve both |
| 85 | // rax and rbx because these registers are used when copying the |
| 86 | // arguments and the receiver. |
| 87 | __ Integer32ToSmi(rcx, rax); |
| 88 | __ push(rcx); |
| 89 | } |
| 90 | |
| 91 | |
| 92 | static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { |
| 93 | // Retrieve the number of arguments from the stack. Number is a Smi. |
| 94 | __ movq(rbx, Operand(rbp, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 95 | |
| 96 | // Leave the frame. |
| 97 | __ movq(rsp, rbp); |
| 98 | __ pop(rbp); |
| 99 | |
| 100 | // Remove caller arguments from the stack. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 101 | __ pop(rcx); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 102 | SmiIndex index = masm->SmiToIndex(rbx, rbx, kPointerSizeLog2); |
| 103 | __ lea(rsp, Operand(rsp, index.reg, index.scale, 1 * kPointerSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 104 | __ push(rcx); |
| 105 | } |
| 106 | |
| 107 | |
| 108 | void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { |
| 109 | // ----------- S t a t e ------------- |
| 110 | // -- rax : actual number of arguments |
| 111 | // -- rbx : expected number of arguments |
| 112 | // -- rdx : code entry to call |
| 113 | // ----------------------------------- |
| 114 | |
| 115 | Label invoke, dont_adapt_arguments; |
| 116 | __ IncrementCounter(&Counters::arguments_adaptors, 1); |
| 117 | |
| 118 | Label enough, too_few; |
| 119 | __ cmpq(rax, rbx); |
| 120 | __ j(less, &too_few); |
| 121 | __ cmpq(rbx, Immediate(SharedFunctionInfo::kDontAdaptArgumentsSentinel)); |
| 122 | __ j(equal, &dont_adapt_arguments); |
| 123 | |
| 124 | { // Enough parameters: Actual >= expected. |
| 125 | __ bind(&enough); |
| 126 | EnterArgumentsAdaptorFrame(masm); |
| 127 | |
| 128 | // Copy receiver and all expected arguments. |
| 129 | const int offset = StandardFrameConstants::kCallerSPOffset; |
| 130 | __ lea(rax, Operand(rbp, rax, times_pointer_size, offset)); |
| 131 | __ movq(rcx, Immediate(-1)); // account for receiver |
| 132 | |
| 133 | Label copy; |
| 134 | __ bind(©); |
| 135 | __ incq(rcx); |
| 136 | __ push(Operand(rax, 0)); |
| 137 | __ subq(rax, Immediate(kPointerSize)); |
| 138 | __ cmpq(rcx, rbx); |
| 139 | __ j(less, ©); |
| 140 | __ jmp(&invoke); |
| 141 | } |
| 142 | |
| 143 | { // Too few parameters: Actual < expected. |
| 144 | __ bind(&too_few); |
| 145 | EnterArgumentsAdaptorFrame(masm); |
| 146 | |
| 147 | // Copy receiver and all actual arguments. |
| 148 | const int offset = StandardFrameConstants::kCallerSPOffset; |
| 149 | __ lea(rdi, Operand(rbp, rax, times_pointer_size, offset)); |
| 150 | __ movq(rcx, Immediate(-1)); // account for receiver |
| 151 | |
| 152 | Label copy; |
| 153 | __ bind(©); |
| 154 | __ incq(rcx); |
| 155 | __ push(Operand(rdi, 0)); |
| 156 | __ subq(rdi, Immediate(kPointerSize)); |
| 157 | __ cmpq(rcx, rax); |
| 158 | __ j(less, ©); |
| 159 | |
| 160 | // Fill remaining expected arguments with undefined values. |
| 161 | Label fill; |
| 162 | __ LoadRoot(kScratchRegister, Heap::kUndefinedValueRootIndex); |
| 163 | __ bind(&fill); |
| 164 | __ incq(rcx); |
| 165 | __ push(kScratchRegister); |
| 166 | __ cmpq(rcx, rbx); |
| 167 | __ j(less, &fill); |
| 168 | |
| 169 | // Restore function pointer. |
| 170 | __ movq(rdi, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); |
| 171 | } |
| 172 | |
| 173 | // Call the entry point. |
| 174 | __ bind(&invoke); |
| 175 | __ call(rdx); |
| 176 | |
| 177 | // Leave frame and return. |
| 178 | LeaveArgumentsAdaptorFrame(masm); |
| 179 | __ ret(0); |
| 180 | |
| 181 | // ------------------------------------------- |
| 182 | // Dont adapt arguments. |
| 183 | // ------------------------------------------- |
| 184 | __ bind(&dont_adapt_arguments); |
| 185 | __ jmp(rdx); |
| 186 | } |
| 187 | |
| 188 | |
| 189 | void Builtins::Generate_FunctionCall(MacroAssembler* masm) { |
| 190 | // Stack Layout: |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 191 | // rsp[0]: Return address |
| 192 | // rsp[1]: Argument n |
| 193 | // rsp[2]: Argument n-1 |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 194 | // ... |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 195 | // rsp[n]: Argument 1 |
| 196 | // rsp[n+1]: Receiver (function to call) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 197 | // |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 198 | // rax contains the number of arguments, n, not counting the receiver. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 199 | // |
| 200 | // 1. Make sure we have at least one argument. |
| 201 | { Label done; |
| 202 | __ testq(rax, rax); |
| 203 | __ j(not_zero, &done); |
| 204 | __ pop(rbx); |
| 205 | __ Push(Factory::undefined_value()); |
| 206 | __ push(rbx); |
| 207 | __ incq(rax); |
| 208 | __ bind(&done); |
| 209 | } |
| 210 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 211 | // 2. Get the function to call (passed as receiver) from the stack, check |
| 212 | // if it is a function. |
| 213 | Label non_function; |
| 214 | // The function to call is at position n+1 on the stack. |
| 215 | __ movq(rdi, Operand(rsp, rax, times_pointer_size, 1 * kPointerSize)); |
| 216 | __ JumpIfSmi(rdi, &non_function); |
| 217 | __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx); |
| 218 | __ j(not_equal, &non_function); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 219 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 220 | // 3a. Patch the first argument if necessary when calling a function. |
| 221 | Label shift_arguments; |
| 222 | { Label convert_to_object, use_global_receiver, patch_receiver; |
| 223 | // Change context eagerly in case we need the global receiver. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 224 | __ movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| 225 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 226 | __ movq(rbx, Operand(rsp, rax, times_pointer_size, 0)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 227 | __ JumpIfSmi(rbx, &convert_to_object); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 228 | |
| 229 | __ CompareRoot(rbx, Heap::kNullValueRootIndex); |
| 230 | __ j(equal, &use_global_receiver); |
| 231 | __ CompareRoot(rbx, Heap::kUndefinedValueRootIndex); |
| 232 | __ j(equal, &use_global_receiver); |
| 233 | |
| 234 | __ CmpObjectType(rbx, FIRST_JS_OBJECT_TYPE, rcx); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 235 | __ j(below, &convert_to_object); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 236 | __ CmpInstanceType(rcx, LAST_JS_OBJECT_TYPE); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 237 | __ j(below_equal, &shift_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 238 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 239 | __ bind(&convert_to_object); |
| 240 | __ EnterInternalFrame(); // In order to preserve argument count. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 241 | __ Integer32ToSmi(rax, rax); |
| 242 | __ push(rax); |
| 243 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 244 | __ push(rbx); |
| 245 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 246 | __ movq(rbx, rax); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 247 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 248 | __ pop(rax); |
| 249 | __ SmiToInteger32(rax, rax); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 250 | __ LeaveInternalFrame(); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 251 | // Restore the function to rdi. |
| 252 | __ movq(rdi, Operand(rsp, rax, times_pointer_size, 1 * kPointerSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 253 | __ jmp(&patch_receiver); |
| 254 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 255 | // Use the global receiver object from the called function as the |
| 256 | // receiver. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 257 | __ bind(&use_global_receiver); |
| 258 | const int kGlobalIndex = |
| 259 | Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 260 | __ movq(rbx, FieldOperand(rsi, kGlobalIndex)); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 261 | __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalContextOffset)); |
| 262 | __ movq(rbx, FieldOperand(rbx, kGlobalIndex)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 263 | __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset)); |
| 264 | |
| 265 | __ bind(&patch_receiver); |
| 266 | __ movq(Operand(rsp, rax, times_pointer_size, 0), rbx); |
| 267 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 268 | __ jmp(&shift_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 269 | } |
| 270 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 271 | |
| 272 | // 3b. Patch the first argument when calling a non-function. The |
| 273 | // CALL_NON_FUNCTION builtin expects the non-function callee as |
| 274 | // receiver, so overwrite the first argument which will ultimately |
| 275 | // become the receiver. |
| 276 | __ bind(&non_function); |
| 277 | __ movq(Operand(rsp, rax, times_pointer_size, 0), rdi); |
| 278 | __ xor_(rdi, rdi); |
| 279 | |
| 280 | // 4. Shift arguments and return address one slot down on the stack |
| 281 | // (overwriting the original receiver). Adjust argument count to make |
| 282 | // the original first argument the new receiver. |
| 283 | __ bind(&shift_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 284 | { Label loop; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 285 | __ movq(rcx, rax); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 286 | __ bind(&loop); |
| 287 | __ movq(rbx, Operand(rsp, rcx, times_pointer_size, 0)); |
| 288 | __ movq(Operand(rsp, rcx, times_pointer_size, 1 * kPointerSize), rbx); |
| 289 | __ decq(rcx); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 290 | __ j(not_sign, &loop); // While non-negative (to copy return address). |
| 291 | __ pop(rbx); // Discard copy of return address. |
| 292 | __ decq(rax); // One fewer argument (first argument is new receiver). |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 293 | } |
| 294 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 295 | // 5a. Call non-function via tail call to CALL_NON_FUNCTION builtin. |
| 296 | { Label function; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 297 | __ testq(rdi, rdi); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 298 | __ j(not_zero, &function); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 299 | __ xor_(rbx, rbx); |
| 300 | __ GetBuiltinEntry(rdx, Builtins::CALL_NON_FUNCTION); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 301 | __ Jump(Handle<Code>(builtin(ArgumentsAdaptorTrampoline)), |
| 302 | RelocInfo::CODE_TARGET); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 303 | __ bind(&function); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 304 | } |
| 305 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 306 | // 5b. Get the code to call from the function and check that the number of |
| 307 | // expected arguments matches what we're providing. If so, jump |
| 308 | // (tail-call) to the code in register edx without checking arguments. |
| 309 | __ movq(rdx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset)); |
| 310 | __ movsxlq(rbx, |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 311 | FieldOperand(rdx, |
| 312 | SharedFunctionInfo::kFormalParameterCountOffset)); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame^] | 313 | __ movq(rdx, FieldOperand(rdi, JSFunction::kCodeOffset)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 314 | __ lea(rdx, FieldOperand(rdx, Code::kHeaderSize)); |
| 315 | __ cmpq(rax, rbx); |
| 316 | __ j(not_equal, |
| 317 | Handle<Code>(builtin(ArgumentsAdaptorTrampoline)), |
| 318 | RelocInfo::CODE_TARGET); |
| 319 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 320 | ParameterCount expected(0); |
| 321 | __ InvokeCode(rdx, expected, expected, JUMP_FUNCTION); |
| 322 | } |
| 323 | |
| 324 | |
| 325 | void Builtins::Generate_FunctionApply(MacroAssembler* masm) { |
| 326 | // Stack at entry: |
| 327 | // rsp: return address |
| 328 | // rsp+8: arguments |
| 329 | // rsp+16: receiver ("this") |
| 330 | // rsp+24: function |
| 331 | __ EnterInternalFrame(); |
| 332 | // Stack frame: |
| 333 | // rbp: Old base pointer |
| 334 | // rbp[1]: return address |
| 335 | // rbp[2]: function arguments |
| 336 | // rbp[3]: receiver |
| 337 | // rbp[4]: function |
| 338 | static const int kArgumentsOffset = 2 * kPointerSize; |
| 339 | static const int kReceiverOffset = 3 * kPointerSize; |
| 340 | static const int kFunctionOffset = 4 * kPointerSize; |
| 341 | __ push(Operand(rbp, kFunctionOffset)); |
| 342 | __ push(Operand(rbp, kArgumentsOffset)); |
| 343 | __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION); |
| 344 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 345 | // Check the stack for overflow. We are not trying need to catch |
| 346 | // interruptions (e.g. debug break and preemption) here, so the "real stack |
| 347 | // limit" is checked. |
| 348 | Label okay; |
| 349 | __ LoadRoot(kScratchRegister, Heap::kRealStackLimitRootIndex); |
| 350 | __ movq(rcx, rsp); |
| 351 | // Make rcx the space we have left. The stack might already be overflowed |
| 352 | // here which will cause rcx to become negative. |
| 353 | __ subq(rcx, kScratchRegister); |
| 354 | // Make rdx the space we need for the array when it is unrolled onto the |
| 355 | // stack. |
| 356 | __ PositiveSmiTimesPowerOfTwoToInteger64(rdx, rax, kPointerSizeLog2); |
| 357 | // Check if the arguments will overflow the stack. |
| 358 | __ cmpq(rcx, rdx); |
| 359 | __ j(greater, &okay); // Signed comparison. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 360 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 361 | // Out of stack space. |
| 362 | __ push(Operand(rbp, kFunctionOffset)); |
| 363 | __ push(rax); |
| 364 | __ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_FUNCTION); |
| 365 | __ bind(&okay); |
| 366 | // End of stack check. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 367 | |
| 368 | // Push current index and limit. |
| 369 | const int kLimitOffset = |
| 370 | StandardFrameConstants::kExpressionsOffset - 1 * kPointerSize; |
| 371 | const int kIndexOffset = kLimitOffset - 1 * kPointerSize; |
| 372 | __ push(rax); // limit |
| 373 | __ push(Immediate(0)); // index |
| 374 | |
| 375 | // Change context eagerly to get the right global object if |
| 376 | // necessary. |
| 377 | __ movq(rdi, Operand(rbp, kFunctionOffset)); |
| 378 | __ movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| 379 | |
| 380 | // Compute the receiver. |
| 381 | Label call_to_object, use_global_receiver, push_receiver; |
| 382 | __ movq(rbx, Operand(rbp, kReceiverOffset)); |
| 383 | __ JumpIfSmi(rbx, &call_to_object); |
| 384 | __ CompareRoot(rbx, Heap::kNullValueRootIndex); |
| 385 | __ j(equal, &use_global_receiver); |
| 386 | __ CompareRoot(rbx, Heap::kUndefinedValueRootIndex); |
| 387 | __ j(equal, &use_global_receiver); |
| 388 | |
| 389 | // If given receiver is already a JavaScript object then there's no |
| 390 | // reason for converting it. |
| 391 | __ CmpObjectType(rbx, FIRST_JS_OBJECT_TYPE, rcx); |
| 392 | __ j(below, &call_to_object); |
| 393 | __ CmpInstanceType(rcx, LAST_JS_OBJECT_TYPE); |
| 394 | __ j(below_equal, &push_receiver); |
| 395 | |
| 396 | // Convert the receiver to an object. |
| 397 | __ bind(&call_to_object); |
| 398 | __ push(rbx); |
| 399 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 400 | __ movq(rbx, rax); |
| 401 | __ jmp(&push_receiver); |
| 402 | |
| 403 | // Use the current global receiver object as the receiver. |
| 404 | __ bind(&use_global_receiver); |
| 405 | const int kGlobalOffset = |
| 406 | Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 407 | __ movq(rbx, FieldOperand(rsi, kGlobalOffset)); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 408 | __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalContextOffset)); |
| 409 | __ movq(rbx, FieldOperand(rbx, kGlobalOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 410 | __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset)); |
| 411 | |
| 412 | // Push the receiver. |
| 413 | __ bind(&push_receiver); |
| 414 | __ push(rbx); |
| 415 | |
| 416 | // Copy all arguments from the array to the stack. |
| 417 | Label entry, loop; |
| 418 | __ movq(rax, Operand(rbp, kIndexOffset)); |
| 419 | __ jmp(&entry); |
| 420 | __ bind(&loop); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 421 | __ movq(rdx, Operand(rbp, kArgumentsOffset)); // load arguments |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 422 | |
| 423 | // Use inline caching to speed up access to arguments. |
| 424 | Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| 425 | __ Call(ic, RelocInfo::CODE_TARGET); |
| 426 | // It is important that we do not have a test instruction after the |
| 427 | // call. A test instruction after the call is used to indicate that |
| 428 | // we have generated an inline version of the keyed load. In this |
| 429 | // case, we know that we are not generating a test instruction next. |
| 430 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 431 | // Push the nth argument. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 432 | __ push(rax); |
| 433 | |
| 434 | // Update the index on the stack and in register rax. |
| 435 | __ movq(rax, Operand(rbp, kIndexOffset)); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 436 | __ SmiAddConstant(rax, rax, Smi::FromInt(1)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 437 | __ movq(Operand(rbp, kIndexOffset), rax); |
| 438 | |
| 439 | __ bind(&entry); |
| 440 | __ cmpq(rax, Operand(rbp, kLimitOffset)); |
| 441 | __ j(not_equal, &loop); |
| 442 | |
| 443 | // Invoke the function. |
| 444 | ParameterCount actual(rax); |
| 445 | __ SmiToInteger32(rax, rax); |
| 446 | __ movq(rdi, Operand(rbp, kFunctionOffset)); |
| 447 | __ InvokeFunction(rdi, actual, CALL_FUNCTION); |
| 448 | |
| 449 | __ LeaveInternalFrame(); |
| 450 | __ ret(3 * kPointerSize); // remove function, receiver, and arguments |
| 451 | } |
| 452 | |
| 453 | |
| 454 | // Load the built-in Array function from the current context. |
| 455 | static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) { |
| 456 | // Load the global context. |
| 457 | __ movq(result, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 458 | __ movq(result, FieldOperand(result, GlobalObject::kGlobalContextOffset)); |
| 459 | // Load the Array function from the global context. |
| 460 | __ movq(result, |
| 461 | Operand(result, Context::SlotOffset(Context::ARRAY_FUNCTION_INDEX))); |
| 462 | } |
| 463 | |
| 464 | |
| 465 | // Number of empty elements to allocate for an empty array. |
| 466 | static const int kPreallocatedArrayElements = 4; |
| 467 | |
| 468 | |
| 469 | // Allocate an empty JSArray. The allocated array is put into the result |
| 470 | // register. If the parameter initial_capacity is larger than zero an elements |
| 471 | // backing store is allocated with this size and filled with the hole values. |
| 472 | // Otherwise the elements backing store is set to the empty FixedArray. |
| 473 | static void AllocateEmptyJSArray(MacroAssembler* masm, |
| 474 | Register array_function, |
| 475 | Register result, |
| 476 | Register scratch1, |
| 477 | Register scratch2, |
| 478 | Register scratch3, |
| 479 | int initial_capacity, |
| 480 | Label* gc_required) { |
| 481 | ASSERT(initial_capacity >= 0); |
| 482 | |
| 483 | // Load the initial map from the array function. |
| 484 | __ movq(scratch1, FieldOperand(array_function, |
| 485 | JSFunction::kPrototypeOrInitialMapOffset)); |
| 486 | |
| 487 | // Allocate the JSArray object together with space for a fixed array with the |
| 488 | // requested elements. |
| 489 | int size = JSArray::kSize; |
| 490 | if (initial_capacity > 0) { |
| 491 | size += FixedArray::SizeFor(initial_capacity); |
| 492 | } |
| 493 | __ AllocateInNewSpace(size, |
| 494 | result, |
| 495 | scratch2, |
| 496 | scratch3, |
| 497 | gc_required, |
| 498 | TAG_OBJECT); |
| 499 | |
| 500 | // Allocated the JSArray. Now initialize the fields except for the elements |
| 501 | // array. |
| 502 | // result: JSObject |
| 503 | // scratch1: initial map |
| 504 | // scratch2: start of next object |
| 505 | __ movq(FieldOperand(result, JSObject::kMapOffset), scratch1); |
| 506 | __ Move(FieldOperand(result, JSArray::kPropertiesOffset), |
| 507 | Factory::empty_fixed_array()); |
| 508 | // Field JSArray::kElementsOffset is initialized later. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 509 | __ Move(FieldOperand(result, JSArray::kLengthOffset), Smi::FromInt(0)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 510 | |
| 511 | // If no storage is requested for the elements array just set the empty |
| 512 | // fixed array. |
| 513 | if (initial_capacity == 0) { |
| 514 | __ Move(FieldOperand(result, JSArray::kElementsOffset), |
| 515 | Factory::empty_fixed_array()); |
| 516 | return; |
| 517 | } |
| 518 | |
| 519 | // Calculate the location of the elements array and set elements array member |
| 520 | // of the JSArray. |
| 521 | // result: JSObject |
| 522 | // scratch2: start of next object |
| 523 | __ lea(scratch1, Operand(result, JSArray::kSize)); |
| 524 | __ movq(FieldOperand(result, JSArray::kElementsOffset), scratch1); |
| 525 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 526 | // Initialize the FixedArray and fill it with holes. FixedArray length is |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 527 | // stored as a smi. |
| 528 | // result: JSObject |
| 529 | // scratch1: elements array |
| 530 | // scratch2: start of next object |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 531 | __ Move(FieldOperand(scratch1, HeapObject::kMapOffset), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 532 | Factory::fixed_array_map()); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 533 | __ Move(FieldOperand(scratch1, FixedArray::kLengthOffset), |
| 534 | Smi::FromInt(initial_capacity)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 535 | |
| 536 | // Fill the FixedArray with the hole value. Inline the code if short. |
| 537 | // Reconsider loop unfolding if kPreallocatedArrayElements gets changed. |
| 538 | static const int kLoopUnfoldLimit = 4; |
| 539 | ASSERT(kPreallocatedArrayElements <= kLoopUnfoldLimit); |
| 540 | __ Move(scratch3, Factory::the_hole_value()); |
| 541 | if (initial_capacity <= kLoopUnfoldLimit) { |
| 542 | // Use a scratch register here to have only one reloc info when unfolding |
| 543 | // the loop. |
| 544 | for (int i = 0; i < initial_capacity; i++) { |
| 545 | __ movq(FieldOperand(scratch1, |
| 546 | FixedArray::kHeaderSize + i * kPointerSize), |
| 547 | scratch3); |
| 548 | } |
| 549 | } else { |
| 550 | Label loop, entry; |
| 551 | __ jmp(&entry); |
| 552 | __ bind(&loop); |
| 553 | __ movq(Operand(scratch1, 0), scratch3); |
| 554 | __ addq(scratch1, Immediate(kPointerSize)); |
| 555 | __ bind(&entry); |
| 556 | __ cmpq(scratch1, scratch2); |
| 557 | __ j(below, &loop); |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | |
| 562 | // Allocate a JSArray with the number of elements stored in a register. The |
| 563 | // register array_function holds the built-in Array function and the register |
| 564 | // array_size holds the size of the array as a smi. The allocated array is put |
| 565 | // into the result register and beginning and end of the FixedArray elements |
| 566 | // storage is put into registers elements_array and elements_array_end (see |
| 567 | // below for when that is not the case). If the parameter fill_with_holes is |
| 568 | // true the allocated elements backing store is filled with the hole values |
| 569 | // otherwise it is left uninitialized. When the backing store is filled the |
| 570 | // register elements_array is scratched. |
| 571 | static void AllocateJSArray(MacroAssembler* masm, |
| 572 | Register array_function, // Array function. |
| 573 | Register array_size, // As a smi. |
| 574 | Register result, |
| 575 | Register elements_array, |
| 576 | Register elements_array_end, |
| 577 | Register scratch, |
| 578 | bool fill_with_hole, |
| 579 | Label* gc_required) { |
| 580 | Label not_empty, allocated; |
| 581 | |
| 582 | // Load the initial map from the array function. |
| 583 | __ movq(elements_array, |
| 584 | FieldOperand(array_function, |
| 585 | JSFunction::kPrototypeOrInitialMapOffset)); |
| 586 | |
| 587 | // Check whether an empty sized array is requested. |
| 588 | __ testq(array_size, array_size); |
| 589 | __ j(not_zero, ¬_empty); |
| 590 | |
| 591 | // If an empty array is requested allocate a small elements array anyway. This |
| 592 | // keeps the code below free of special casing for the empty array. |
| 593 | int size = JSArray::kSize + FixedArray::SizeFor(kPreallocatedArrayElements); |
| 594 | __ AllocateInNewSpace(size, |
| 595 | result, |
| 596 | elements_array_end, |
| 597 | scratch, |
| 598 | gc_required, |
| 599 | TAG_OBJECT); |
| 600 | __ jmp(&allocated); |
| 601 | |
| 602 | // Allocate the JSArray object together with space for a FixedArray with the |
| 603 | // requested elements. |
| 604 | __ bind(¬_empty); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 605 | SmiIndex index = |
| 606 | masm->SmiToIndex(kScratchRegister, array_size, kPointerSizeLog2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 607 | __ AllocateInNewSpace(JSArray::kSize + FixedArray::kHeaderSize, |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 608 | index.scale, |
| 609 | index.reg, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 610 | result, |
| 611 | elements_array_end, |
| 612 | scratch, |
| 613 | gc_required, |
| 614 | TAG_OBJECT); |
| 615 | |
| 616 | // Allocated the JSArray. Now initialize the fields except for the elements |
| 617 | // array. |
| 618 | // result: JSObject |
| 619 | // elements_array: initial map |
| 620 | // elements_array_end: start of next object |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 621 | // array_size: size of array (smi) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 622 | __ bind(&allocated); |
| 623 | __ movq(FieldOperand(result, JSObject::kMapOffset), elements_array); |
| 624 | __ Move(elements_array, Factory::empty_fixed_array()); |
| 625 | __ movq(FieldOperand(result, JSArray::kPropertiesOffset), elements_array); |
| 626 | // Field JSArray::kElementsOffset is initialized later. |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 627 | __ movq(FieldOperand(result, JSArray::kLengthOffset), array_size); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 628 | |
| 629 | // Calculate the location of the elements array and set elements array member |
| 630 | // of the JSArray. |
| 631 | // result: JSObject |
| 632 | // elements_array_end: start of next object |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 633 | // array_size: size of array (smi) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 634 | __ lea(elements_array, Operand(result, JSArray::kSize)); |
| 635 | __ movq(FieldOperand(result, JSArray::kElementsOffset), elements_array); |
| 636 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 637 | // Initialize the fixed array. FixedArray length is stored as a smi. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 638 | // result: JSObject |
| 639 | // elements_array: elements array |
| 640 | // elements_array_end: start of next object |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 641 | // array_size: size of array (smi) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 642 | __ Move(FieldOperand(elements_array, JSObject::kMapOffset), |
| 643 | Factory::fixed_array_map()); |
| 644 | Label not_empty_2, fill_array; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 645 | __ SmiTest(array_size); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 646 | __ j(not_zero, ¬_empty_2); |
| 647 | // Length of the FixedArray is the number of pre-allocated elements even |
| 648 | // though the actual JSArray has length 0. |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 649 | __ Move(FieldOperand(elements_array, FixedArray::kLengthOffset), |
| 650 | Smi::FromInt(kPreallocatedArrayElements)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 651 | __ jmp(&fill_array); |
| 652 | __ bind(¬_empty_2); |
| 653 | // For non-empty JSArrays the length of the FixedArray and the JSArray is the |
| 654 | // same. |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 655 | __ movq(FieldOperand(elements_array, FixedArray::kLengthOffset), array_size); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 656 | |
| 657 | // Fill the allocated FixedArray with the hole value if requested. |
| 658 | // result: JSObject |
| 659 | // elements_array: elements array |
| 660 | // elements_array_end: start of next object |
| 661 | __ bind(&fill_array); |
| 662 | if (fill_with_hole) { |
| 663 | Label loop, entry; |
| 664 | __ Move(scratch, Factory::the_hole_value()); |
| 665 | __ lea(elements_array, Operand(elements_array, |
| 666 | FixedArray::kHeaderSize - kHeapObjectTag)); |
| 667 | __ jmp(&entry); |
| 668 | __ bind(&loop); |
| 669 | __ movq(Operand(elements_array, 0), scratch); |
| 670 | __ addq(elements_array, Immediate(kPointerSize)); |
| 671 | __ bind(&entry); |
| 672 | __ cmpq(elements_array, elements_array_end); |
| 673 | __ j(below, &loop); |
| 674 | } |
| 675 | } |
| 676 | |
| 677 | |
| 678 | // Create a new array for the built-in Array function. This function allocates |
| 679 | // the JSArray object and the FixedArray elements array and initializes these. |
| 680 | // If the Array cannot be constructed in native code the runtime is called. This |
| 681 | // function assumes the following state: |
| 682 | // rdi: constructor (built-in Array function) |
| 683 | // rax: argc |
| 684 | // rsp[0]: return address |
| 685 | // rsp[8]: last argument |
| 686 | // This function is used for both construct and normal calls of Array. The only |
| 687 | // difference between handling a construct call and a normal call is that for a |
| 688 | // construct call the constructor function in rdi needs to be preserved for |
| 689 | // entering the generic code. In both cases argc in rax needs to be preserved. |
| 690 | // Both registers are preserved by this code so no need to differentiate between |
| 691 | // a construct call and a normal call. |
| 692 | static void ArrayNativeCode(MacroAssembler* masm, |
| 693 | Label *call_generic_code) { |
| 694 | Label argc_one_or_more, argc_two_or_more; |
| 695 | |
| 696 | // Check for array construction with zero arguments. |
| 697 | __ testq(rax, rax); |
| 698 | __ j(not_zero, &argc_one_or_more); |
| 699 | |
| 700 | // Handle construction of an empty array. |
| 701 | AllocateEmptyJSArray(masm, |
| 702 | rdi, |
| 703 | rbx, |
| 704 | rcx, |
| 705 | rdx, |
| 706 | r8, |
| 707 | kPreallocatedArrayElements, |
| 708 | call_generic_code); |
| 709 | __ IncrementCounter(&Counters::array_function_native, 1); |
| 710 | __ movq(rax, rbx); |
| 711 | __ ret(kPointerSize); |
| 712 | |
| 713 | // Check for one argument. Bail out if argument is not smi or if it is |
| 714 | // negative. |
| 715 | __ bind(&argc_one_or_more); |
| 716 | __ cmpq(rax, Immediate(1)); |
| 717 | __ j(not_equal, &argc_two_or_more); |
| 718 | __ movq(rdx, Operand(rsp, kPointerSize)); // Get the argument from the stack. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 719 | __ JumpIfNotPositiveSmi(rdx, call_generic_code); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 720 | |
| 721 | // Handle construction of an empty array of a certain size. Bail out if size |
| 722 | // is to large to actually allocate an elements array. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 723 | __ SmiCompare(rdx, Smi::FromInt(JSObject::kInitialMaxFastElementArray)); |
| 724 | __ j(greater_equal, call_generic_code); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 725 | |
| 726 | // rax: argc |
| 727 | // rdx: array_size (smi) |
| 728 | // rdi: constructor |
| 729 | // esp[0]: return address |
| 730 | // esp[8]: argument |
| 731 | AllocateJSArray(masm, |
| 732 | rdi, |
| 733 | rdx, |
| 734 | rbx, |
| 735 | rcx, |
| 736 | r8, |
| 737 | r9, |
| 738 | true, |
| 739 | call_generic_code); |
| 740 | __ IncrementCounter(&Counters::array_function_native, 1); |
| 741 | __ movq(rax, rbx); |
| 742 | __ ret(2 * kPointerSize); |
| 743 | |
| 744 | // Handle construction of an array from a list of arguments. |
| 745 | __ bind(&argc_two_or_more); |
| 746 | __ movq(rdx, rax); |
| 747 | __ Integer32ToSmi(rdx, rdx); // Convet argc to a smi. |
| 748 | // rax: argc |
| 749 | // rdx: array_size (smi) |
| 750 | // rdi: constructor |
| 751 | // esp[0] : return address |
| 752 | // esp[8] : last argument |
| 753 | AllocateJSArray(masm, |
| 754 | rdi, |
| 755 | rdx, |
| 756 | rbx, |
| 757 | rcx, |
| 758 | r8, |
| 759 | r9, |
| 760 | false, |
| 761 | call_generic_code); |
| 762 | __ IncrementCounter(&Counters::array_function_native, 1); |
| 763 | |
| 764 | // rax: argc |
| 765 | // rbx: JSArray |
| 766 | // rcx: elements_array |
| 767 | // r8: elements_array_end (untagged) |
| 768 | // esp[0]: return address |
| 769 | // esp[8]: last argument |
| 770 | |
| 771 | // Location of the last argument |
| 772 | __ lea(r9, Operand(rsp, kPointerSize)); |
| 773 | |
| 774 | // Location of the first array element (Parameter fill_with_holes to |
| 775 | // AllocateJSArrayis false, so the FixedArray is returned in rcx). |
| 776 | __ lea(rdx, Operand(rcx, FixedArray::kHeaderSize - kHeapObjectTag)); |
| 777 | |
| 778 | // rax: argc |
| 779 | // rbx: JSArray |
| 780 | // rdx: location of the first array element |
| 781 | // r9: location of the last argument |
| 782 | // esp[0]: return address |
| 783 | // esp[8]: last argument |
| 784 | Label loop, entry; |
| 785 | __ movq(rcx, rax); |
| 786 | __ jmp(&entry); |
| 787 | __ bind(&loop); |
| 788 | __ movq(kScratchRegister, Operand(r9, rcx, times_pointer_size, 0)); |
| 789 | __ movq(Operand(rdx, 0), kScratchRegister); |
| 790 | __ addq(rdx, Immediate(kPointerSize)); |
| 791 | __ bind(&entry); |
| 792 | __ decq(rcx); |
| 793 | __ j(greater_equal, &loop); |
| 794 | |
| 795 | // Remove caller arguments from the stack and return. |
| 796 | // rax: argc |
| 797 | // rbx: JSArray |
| 798 | // esp[0]: return address |
| 799 | // esp[8]: last argument |
| 800 | __ pop(rcx); |
| 801 | __ lea(rsp, Operand(rsp, rax, times_pointer_size, 1 * kPointerSize)); |
| 802 | __ push(rcx); |
| 803 | __ movq(rax, rbx); |
| 804 | __ ret(0); |
| 805 | } |
| 806 | |
| 807 | |
| 808 | void Builtins::Generate_ArrayCode(MacroAssembler* masm) { |
| 809 | // ----------- S t a t e ------------- |
| 810 | // -- rax : argc |
| 811 | // -- rsp[0] : return address |
| 812 | // -- rsp[8] : last argument |
| 813 | // ----------------------------------- |
| 814 | Label generic_array_code; |
| 815 | |
| 816 | // Get the Array function. |
| 817 | GenerateLoadArrayFunction(masm, rdi); |
| 818 | |
| 819 | if (FLAG_debug_code) { |
| 820 | // Initial map for the builtin Array function shoud be a map. |
| 821 | __ movq(rbx, FieldOperand(rdi, JSFunction::kPrototypeOrInitialMapOffset)); |
| 822 | // Will both indicate a NULL and a Smi. |
| 823 | ASSERT(kSmiTag == 0); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 824 | Condition not_smi = NegateCondition(masm->CheckSmi(rbx)); |
| 825 | __ Check(not_smi, "Unexpected initial map for Array function"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 826 | __ CmpObjectType(rbx, MAP_TYPE, rcx); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 827 | __ Check(equal, "Unexpected initial map for Array function"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 828 | } |
| 829 | |
| 830 | // Run the native code for the Array function called as a normal function. |
| 831 | ArrayNativeCode(masm, &generic_array_code); |
| 832 | |
| 833 | // Jump to the generic array code in case the specialized code cannot handle |
| 834 | // the construction. |
| 835 | __ bind(&generic_array_code); |
| 836 | Code* code = Builtins::builtin(Builtins::ArrayCodeGeneric); |
| 837 | Handle<Code> array_code(code); |
| 838 | __ Jump(array_code, RelocInfo::CODE_TARGET); |
| 839 | } |
| 840 | |
| 841 | |
| 842 | void Builtins::Generate_ArrayConstructCode(MacroAssembler* masm) { |
| 843 | // ----------- S t a t e ------------- |
| 844 | // -- rax : argc |
| 845 | // -- rdi : constructor |
| 846 | // -- rsp[0] : return address |
| 847 | // -- rsp[8] : last argument |
| 848 | // ----------------------------------- |
| 849 | Label generic_constructor; |
| 850 | |
| 851 | if (FLAG_debug_code) { |
| 852 | // The array construct code is only set for the builtin Array function which |
| 853 | // does always have a map. |
| 854 | GenerateLoadArrayFunction(masm, rbx); |
| 855 | __ cmpq(rdi, rbx); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 856 | __ Check(equal, "Unexpected Array function"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 857 | // Initial map for the builtin Array function should be a map. |
| 858 | __ movq(rbx, FieldOperand(rdi, JSFunction::kPrototypeOrInitialMapOffset)); |
| 859 | // Will both indicate a NULL and a Smi. |
| 860 | ASSERT(kSmiTag == 0); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 861 | Condition not_smi = NegateCondition(masm->CheckSmi(rbx)); |
| 862 | __ Check(not_smi, "Unexpected initial map for Array function"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 863 | __ CmpObjectType(rbx, MAP_TYPE, rcx); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 864 | __ Check(equal, "Unexpected initial map for Array function"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 865 | } |
| 866 | |
| 867 | // Run the native code for the Array function called as constructor. |
| 868 | ArrayNativeCode(masm, &generic_constructor); |
| 869 | |
| 870 | // Jump to the generic construct code in case the specialized code cannot |
| 871 | // handle the construction. |
| 872 | __ bind(&generic_constructor); |
| 873 | Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric); |
| 874 | Handle<Code> generic_construct_stub(code); |
| 875 | __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET); |
| 876 | } |
| 877 | |
| 878 | |
| 879 | void Builtins::Generate_JSConstructCall(MacroAssembler* masm) { |
| 880 | // ----------- S t a t e ------------- |
| 881 | // -- rax: number of arguments |
| 882 | // -- rdi: constructor function |
| 883 | // ----------------------------------- |
| 884 | |
| 885 | Label non_function_call; |
| 886 | // Check that function is not a smi. |
| 887 | __ JumpIfSmi(rdi, &non_function_call); |
| 888 | // Check that function is a JSFunction. |
| 889 | __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx); |
| 890 | __ j(not_equal, &non_function_call); |
| 891 | |
| 892 | // Jump to the function-specific construct stub. |
| 893 | __ movq(rbx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset)); |
| 894 | __ movq(rbx, FieldOperand(rbx, SharedFunctionInfo::kConstructStubOffset)); |
| 895 | __ lea(rbx, FieldOperand(rbx, Code::kHeaderSize)); |
| 896 | __ jmp(rbx); |
| 897 | |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 898 | // rdi: called object |
| 899 | // rax: number of arguments |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 900 | __ bind(&non_function_call); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 901 | // CALL_NON_FUNCTION expects the non-function constructor as receiver |
| 902 | // (instead of the original receiver from the call site). The receiver is |
| 903 | // stack element argc+1. |
| 904 | __ movq(Operand(rsp, rax, times_pointer_size, kPointerSize), rdi); |
| 905 | // Set expected number of arguments to zero (not changing rax). |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 906 | __ movq(rbx, Immediate(0)); |
| 907 | __ GetBuiltinEntry(rdx, Builtins::CALL_NON_FUNCTION_AS_CONSTRUCTOR); |
| 908 | __ Jump(Handle<Code>(builtin(ArgumentsAdaptorTrampoline)), |
| 909 | RelocInfo::CODE_TARGET); |
| 910 | } |
| 911 | |
| 912 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 913 | static void Generate_JSConstructStubHelper(MacroAssembler* masm, |
| 914 | bool is_api_function) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 915 | // Enter a construct frame. |
| 916 | __ EnterConstructFrame(); |
| 917 | |
| 918 | // Store a smi-tagged arguments count on the stack. |
| 919 | __ Integer32ToSmi(rax, rax); |
| 920 | __ push(rax); |
| 921 | |
| 922 | // Push the function to invoke on the stack. |
| 923 | __ push(rdi); |
| 924 | |
| 925 | // Try to allocate the object without transitioning into C code. If any of the |
| 926 | // preconditions is not met, the code bails out to the runtime call. |
| 927 | Label rt_call, allocated; |
| 928 | if (FLAG_inline_new) { |
| 929 | Label undo_allocation; |
| 930 | |
| 931 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 932 | ExternalReference debug_step_in_fp = |
| 933 | ExternalReference::debug_step_in_fp_address(); |
| 934 | __ movq(kScratchRegister, debug_step_in_fp); |
| 935 | __ cmpq(Operand(kScratchRegister, 0), Immediate(0)); |
| 936 | __ j(not_equal, &rt_call); |
| 937 | #endif |
| 938 | |
| 939 | // Verified that the constructor is a JSFunction. |
| 940 | // Load the initial map and verify that it is in fact a map. |
| 941 | // rdi: constructor |
| 942 | __ movq(rax, FieldOperand(rdi, JSFunction::kPrototypeOrInitialMapOffset)); |
| 943 | // Will both indicate a NULL and a Smi |
| 944 | ASSERT(kSmiTag == 0); |
| 945 | __ JumpIfSmi(rax, &rt_call); |
| 946 | // rdi: constructor |
| 947 | // rax: initial map (if proven valid below) |
| 948 | __ CmpObjectType(rax, MAP_TYPE, rbx); |
| 949 | __ j(not_equal, &rt_call); |
| 950 | |
| 951 | // Check that the constructor is not constructing a JSFunction (see comments |
| 952 | // in Runtime_NewObject in runtime.cc). In which case the initial map's |
| 953 | // instance type would be JS_FUNCTION_TYPE. |
| 954 | // rdi: constructor |
| 955 | // rax: initial map |
| 956 | __ CmpInstanceType(rax, JS_FUNCTION_TYPE); |
| 957 | __ j(equal, &rt_call); |
| 958 | |
| 959 | // Now allocate the JSObject on the heap. |
| 960 | __ movzxbq(rdi, FieldOperand(rax, Map::kInstanceSizeOffset)); |
| 961 | __ shl(rdi, Immediate(kPointerSizeLog2)); |
| 962 | // rdi: size of new object |
| 963 | __ AllocateInNewSpace(rdi, |
| 964 | rbx, |
| 965 | rdi, |
| 966 | no_reg, |
| 967 | &rt_call, |
| 968 | NO_ALLOCATION_FLAGS); |
| 969 | // Allocated the JSObject, now initialize the fields. |
| 970 | // rax: initial map |
| 971 | // rbx: JSObject (not HeapObject tagged - the actual address). |
| 972 | // rdi: start of next object |
| 973 | __ movq(Operand(rbx, JSObject::kMapOffset), rax); |
| 974 | __ LoadRoot(rcx, Heap::kEmptyFixedArrayRootIndex); |
| 975 | __ movq(Operand(rbx, JSObject::kPropertiesOffset), rcx); |
| 976 | __ movq(Operand(rbx, JSObject::kElementsOffset), rcx); |
| 977 | // Set extra fields in the newly allocated object. |
| 978 | // rax: initial map |
| 979 | // rbx: JSObject |
| 980 | // rdi: start of next object |
| 981 | { Label loop, entry; |
| 982 | __ LoadRoot(rdx, Heap::kUndefinedValueRootIndex); |
| 983 | __ lea(rcx, Operand(rbx, JSObject::kHeaderSize)); |
| 984 | __ jmp(&entry); |
| 985 | __ bind(&loop); |
| 986 | __ movq(Operand(rcx, 0), rdx); |
| 987 | __ addq(rcx, Immediate(kPointerSize)); |
| 988 | __ bind(&entry); |
| 989 | __ cmpq(rcx, rdi); |
| 990 | __ j(less, &loop); |
| 991 | } |
| 992 | |
| 993 | // Add the object tag to make the JSObject real, so that we can continue and |
| 994 | // jump into the continuation code at any time from now on. Any failures |
| 995 | // need to undo the allocation, so that the heap is in a consistent state |
| 996 | // and verifiable. |
| 997 | // rax: initial map |
| 998 | // rbx: JSObject |
| 999 | // rdi: start of next object |
| 1000 | __ or_(rbx, Immediate(kHeapObjectTag)); |
| 1001 | |
| 1002 | // Check if a non-empty properties array is needed. |
| 1003 | // Allocate and initialize a FixedArray if it is. |
| 1004 | // rax: initial map |
| 1005 | // rbx: JSObject |
| 1006 | // rdi: start of next object |
| 1007 | // Calculate total properties described map. |
| 1008 | __ movzxbq(rdx, FieldOperand(rax, Map::kUnusedPropertyFieldsOffset)); |
| 1009 | __ movzxbq(rcx, FieldOperand(rax, Map::kPreAllocatedPropertyFieldsOffset)); |
| 1010 | __ addq(rdx, rcx); |
| 1011 | // Calculate unused properties past the end of the in-object properties. |
| 1012 | __ movzxbq(rcx, FieldOperand(rax, Map::kInObjectPropertiesOffset)); |
| 1013 | __ subq(rdx, rcx); |
| 1014 | // Done if no extra properties are to be allocated. |
| 1015 | __ j(zero, &allocated); |
| 1016 | __ Assert(positive, "Property allocation count failed."); |
| 1017 | |
| 1018 | // Scale the number of elements by pointer size and add the header for |
| 1019 | // FixedArrays to the start of the next object calculation from above. |
| 1020 | // rbx: JSObject |
| 1021 | // rdi: start of next object (will be start of FixedArray) |
| 1022 | // rdx: number of elements in properties array |
| 1023 | __ AllocateInNewSpace(FixedArray::kHeaderSize, |
| 1024 | times_pointer_size, |
| 1025 | rdx, |
| 1026 | rdi, |
| 1027 | rax, |
| 1028 | no_reg, |
| 1029 | &undo_allocation, |
| 1030 | RESULT_CONTAINS_TOP); |
| 1031 | |
| 1032 | // Initialize the FixedArray. |
| 1033 | // rbx: JSObject |
| 1034 | // rdi: FixedArray |
| 1035 | // rdx: number of elements |
| 1036 | // rax: start of next object |
| 1037 | __ LoadRoot(rcx, Heap::kFixedArrayMapRootIndex); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1038 | __ movq(Operand(rdi, HeapObject::kMapOffset), rcx); // setup the map |
| 1039 | __ Integer32ToSmi(rdx, rdx); |
| 1040 | __ movq(Operand(rdi, FixedArray::kLengthOffset), rdx); // and length |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1041 | |
| 1042 | // Initialize the fields to undefined. |
| 1043 | // rbx: JSObject |
| 1044 | // rdi: FixedArray |
| 1045 | // rax: start of next object |
| 1046 | // rdx: number of elements |
| 1047 | { Label loop, entry; |
| 1048 | __ LoadRoot(rdx, Heap::kUndefinedValueRootIndex); |
| 1049 | __ lea(rcx, Operand(rdi, FixedArray::kHeaderSize)); |
| 1050 | __ jmp(&entry); |
| 1051 | __ bind(&loop); |
| 1052 | __ movq(Operand(rcx, 0), rdx); |
| 1053 | __ addq(rcx, Immediate(kPointerSize)); |
| 1054 | __ bind(&entry); |
| 1055 | __ cmpq(rcx, rax); |
| 1056 | __ j(below, &loop); |
| 1057 | } |
| 1058 | |
| 1059 | // Store the initialized FixedArray into the properties field of |
| 1060 | // the JSObject |
| 1061 | // rbx: JSObject |
| 1062 | // rdi: FixedArray |
| 1063 | __ or_(rdi, Immediate(kHeapObjectTag)); // add the heap tag |
| 1064 | __ movq(FieldOperand(rbx, JSObject::kPropertiesOffset), rdi); |
| 1065 | |
| 1066 | |
| 1067 | // Continue with JSObject being successfully allocated |
| 1068 | // rbx: JSObject |
| 1069 | __ jmp(&allocated); |
| 1070 | |
| 1071 | // Undo the setting of the new top so that the heap is verifiable. For |
| 1072 | // example, the map's unused properties potentially do not match the |
| 1073 | // allocated objects unused properties. |
| 1074 | // rbx: JSObject (previous new top) |
| 1075 | __ bind(&undo_allocation); |
| 1076 | __ UndoAllocationInNewSpace(rbx); |
| 1077 | } |
| 1078 | |
| 1079 | // Allocate the new receiver object using the runtime call. |
| 1080 | // rdi: function (constructor) |
| 1081 | __ bind(&rt_call); |
| 1082 | // Must restore rdi (constructor) before calling runtime. |
| 1083 | __ movq(rdi, Operand(rsp, 0)); |
| 1084 | __ push(rdi); |
| 1085 | __ CallRuntime(Runtime::kNewObject, 1); |
| 1086 | __ movq(rbx, rax); // store result in rbx |
| 1087 | |
| 1088 | // New object allocated. |
| 1089 | // rbx: newly allocated object |
| 1090 | __ bind(&allocated); |
| 1091 | // Retrieve the function from the stack. |
| 1092 | __ pop(rdi); |
| 1093 | |
| 1094 | // Retrieve smi-tagged arguments count from the stack. |
| 1095 | __ movq(rax, Operand(rsp, 0)); |
| 1096 | __ SmiToInteger32(rax, rax); |
| 1097 | |
| 1098 | // Push the allocated receiver to the stack. We need two copies |
| 1099 | // because we may have to return the original one and the calling |
| 1100 | // conventions dictate that the called function pops the receiver. |
| 1101 | __ push(rbx); |
| 1102 | __ push(rbx); |
| 1103 | |
| 1104 | // Setup pointer to last argument. |
| 1105 | __ lea(rbx, Operand(rbp, StandardFrameConstants::kCallerSPOffset)); |
| 1106 | |
| 1107 | // Copy arguments and receiver to the expression stack. |
| 1108 | Label loop, entry; |
| 1109 | __ movq(rcx, rax); |
| 1110 | __ jmp(&entry); |
| 1111 | __ bind(&loop); |
| 1112 | __ push(Operand(rbx, rcx, times_pointer_size, 0)); |
| 1113 | __ bind(&entry); |
| 1114 | __ decq(rcx); |
| 1115 | __ j(greater_equal, &loop); |
| 1116 | |
| 1117 | // Call the function. |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1118 | if (is_api_function) { |
| 1119 | __ movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| 1120 | Handle<Code> code = Handle<Code>( |
| 1121 | Builtins::builtin(Builtins::HandleApiCallConstruct)); |
| 1122 | ParameterCount expected(0); |
| 1123 | __ InvokeCode(code, expected, expected, |
| 1124 | RelocInfo::CODE_TARGET, CALL_FUNCTION); |
| 1125 | } else { |
| 1126 | ParameterCount actual(rax); |
| 1127 | __ InvokeFunction(rdi, actual, CALL_FUNCTION); |
| 1128 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1129 | |
| 1130 | // Restore context from the frame. |
| 1131 | __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| 1132 | |
| 1133 | // If the result is an object (in the ECMA sense), we should get rid |
| 1134 | // of the receiver and use the result; see ECMA-262 section 13.2.2-7 |
| 1135 | // on page 74. |
| 1136 | Label use_receiver, exit; |
| 1137 | // If the result is a smi, it is *not* an object in the ECMA sense. |
| 1138 | __ JumpIfSmi(rax, &use_receiver); |
| 1139 | |
| 1140 | // If the type of the result (stored in its map) is less than |
| 1141 | // FIRST_JS_OBJECT_TYPE, it is not an object in the ECMA sense. |
| 1142 | __ CmpObjectType(rax, FIRST_JS_OBJECT_TYPE, rcx); |
| 1143 | __ j(above_equal, &exit); |
| 1144 | |
| 1145 | // Throw away the result of the constructor invocation and use the |
| 1146 | // on-stack receiver as the result. |
| 1147 | __ bind(&use_receiver); |
| 1148 | __ movq(rax, Operand(rsp, 0)); |
| 1149 | |
| 1150 | // Restore the arguments count and leave the construct frame. |
| 1151 | __ bind(&exit); |
| 1152 | __ movq(rbx, Operand(rsp, kPointerSize)); // get arguments count |
| 1153 | __ LeaveConstructFrame(); |
| 1154 | |
| 1155 | // Remove caller arguments from the stack and return. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1156 | __ pop(rcx); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1157 | SmiIndex index = masm->SmiToIndex(rbx, rbx, kPointerSizeLog2); |
| 1158 | __ lea(rsp, Operand(rsp, index.reg, index.scale, 1 * kPointerSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1159 | __ push(rcx); |
| 1160 | __ IncrementCounter(&Counters::constructed_objects, 1); |
| 1161 | __ ret(0); |
| 1162 | } |
| 1163 | |
| 1164 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1165 | void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { |
| 1166 | Generate_JSConstructStubHelper(masm, false); |
| 1167 | } |
| 1168 | |
| 1169 | |
| 1170 | void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { |
| 1171 | Generate_JSConstructStubHelper(masm, true); |
| 1172 | } |
| 1173 | |
| 1174 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1175 | static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
| 1176 | bool is_construct) { |
| 1177 | // Expects five C++ function parameters. |
| 1178 | // - Address entry (ignored) |
| 1179 | // - JSFunction* function ( |
| 1180 | // - Object* receiver |
| 1181 | // - int argc |
| 1182 | // - Object*** argv |
| 1183 | // (see Handle::Invoke in execution.cc). |
| 1184 | |
| 1185 | // Platform specific argument handling. After this, the stack contains |
| 1186 | // an internal frame and the pushed function and receiver, and |
| 1187 | // register rax and rbx holds the argument count and argument array, |
| 1188 | // while rdi holds the function pointer and rsi the context. |
| 1189 | #ifdef _WIN64 |
| 1190 | // MSVC parameters in: |
| 1191 | // rcx : entry (ignored) |
| 1192 | // rdx : function |
| 1193 | // r8 : receiver |
| 1194 | // r9 : argc |
| 1195 | // [rsp+0x20] : argv |
| 1196 | |
| 1197 | // Clear the context before we push it when entering the JS frame. |
| 1198 | __ xor_(rsi, rsi); |
| 1199 | __ EnterInternalFrame(); |
| 1200 | |
| 1201 | // Load the function context into rsi. |
| 1202 | __ movq(rsi, FieldOperand(rdx, JSFunction::kContextOffset)); |
| 1203 | |
| 1204 | // Push the function and the receiver onto the stack. |
| 1205 | __ push(rdx); |
| 1206 | __ push(r8); |
| 1207 | |
| 1208 | // Load the number of arguments and setup pointer to the arguments. |
| 1209 | __ movq(rax, r9); |
| 1210 | // Load the previous frame pointer to access C argument on stack |
| 1211 | __ movq(kScratchRegister, Operand(rbp, 0)); |
| 1212 | __ movq(rbx, Operand(kScratchRegister, EntryFrameConstants::kArgvOffset)); |
| 1213 | // Load the function pointer into rdi. |
| 1214 | __ movq(rdi, rdx); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1215 | #else // _WIN64 |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1216 | // GCC parameters in: |
| 1217 | // rdi : entry (ignored) |
| 1218 | // rsi : function |
| 1219 | // rdx : receiver |
| 1220 | // rcx : argc |
| 1221 | // r8 : argv |
| 1222 | |
| 1223 | __ movq(rdi, rsi); |
| 1224 | // rdi : function |
| 1225 | |
| 1226 | // Clear the context before we push it when entering the JS frame. |
| 1227 | __ xor_(rsi, rsi); |
| 1228 | // Enter an internal frame. |
| 1229 | __ EnterInternalFrame(); |
| 1230 | |
| 1231 | // Push the function and receiver and setup the context. |
| 1232 | __ push(rdi); |
| 1233 | __ push(rdx); |
| 1234 | __ movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| 1235 | |
| 1236 | // Load the number of arguments and setup pointer to the arguments. |
| 1237 | __ movq(rax, rcx); |
| 1238 | __ movq(rbx, r8); |
| 1239 | #endif // _WIN64 |
| 1240 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1241 | // Current stack contents: |
| 1242 | // [rsp + 2 * kPointerSize ... ]: Internal frame |
| 1243 | // [rsp + kPointerSize] : function |
| 1244 | // [rsp] : receiver |
| 1245 | // Current register contents: |
| 1246 | // rax : argc |
| 1247 | // rbx : argv |
| 1248 | // rsi : context |
| 1249 | // rdi : function |
| 1250 | |
| 1251 | // Copy arguments to the stack in a loop. |
| 1252 | // Register rbx points to array of pointers to handle locations. |
| 1253 | // Push the values of these handles. |
| 1254 | Label loop, entry; |
| 1255 | __ xor_(rcx, rcx); // Set loop variable to 0. |
| 1256 | __ jmp(&entry); |
| 1257 | __ bind(&loop); |
| 1258 | __ movq(kScratchRegister, Operand(rbx, rcx, times_pointer_size, 0)); |
| 1259 | __ push(Operand(kScratchRegister, 0)); // dereference handle |
| 1260 | __ addq(rcx, Immediate(1)); |
| 1261 | __ bind(&entry); |
| 1262 | __ cmpq(rcx, rax); |
| 1263 | __ j(not_equal, &loop); |
| 1264 | |
| 1265 | // Invoke the code. |
| 1266 | if (is_construct) { |
| 1267 | // Expects rdi to hold function pointer. |
| 1268 | __ Call(Handle<Code>(Builtins::builtin(Builtins::JSConstructCall)), |
| 1269 | RelocInfo::CODE_TARGET); |
| 1270 | } else { |
| 1271 | ParameterCount actual(rax); |
| 1272 | // Function must be in rdi. |
| 1273 | __ InvokeFunction(rdi, actual, CALL_FUNCTION); |
| 1274 | } |
| 1275 | |
| 1276 | // Exit the JS frame. Notice that this also removes the empty |
| 1277 | // context and the function left on the stack by the code |
| 1278 | // invocation. |
| 1279 | __ LeaveInternalFrame(); |
| 1280 | // TODO(X64): Is argument correct? Is there a receiver to remove? |
| 1281 | __ ret(1 * kPointerSize); // remove receiver |
| 1282 | } |
| 1283 | |
| 1284 | |
| 1285 | void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| 1286 | Generate_JSEntryTrampolineHelper(masm, false); |
| 1287 | } |
| 1288 | |
| 1289 | |
| 1290 | void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| 1291 | Generate_JSEntryTrampolineHelper(masm, true); |
| 1292 | } |
| 1293 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame^] | 1294 | |
| 1295 | void Builtins::Generate_LazyCompile(MacroAssembler* masm) { |
| 1296 | // Enter an internal frame. |
| 1297 | __ EnterInternalFrame(); |
| 1298 | |
| 1299 | // Push a copy of the function onto the stack. |
| 1300 | __ push(rdi); |
| 1301 | |
| 1302 | __ push(rdi); // Function is also the parameter to the runtime call. |
| 1303 | __ CallRuntime(Runtime::kLazyCompile, 1); |
| 1304 | __ pop(rdi); |
| 1305 | |
| 1306 | // Tear down temporary frame. |
| 1307 | __ LeaveInternalFrame(); |
| 1308 | |
| 1309 | // Do a tail-call of the compiled function. |
| 1310 | __ lea(rcx, FieldOperand(rax, Code::kHeaderSize)); |
| 1311 | __ jmp(rcx); |
| 1312 | } |
| 1313 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1314 | } } // namespace v8::internal |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 1315 | |
| 1316 | #endif // V8_TARGET_ARCH_X64 |