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Issue 2827243005: Revert of [regexp] Remove remainder of native RegExpExecStub (Closed)
Patch Set: Created 3 years, 8 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #if V8_TARGET_ARCH_MIPS64 5 #if V8_TARGET_ARCH_MIPS64
6 6
7 #include "src/code-stubs.h" 7 #include "src/code-stubs.h"
8 #include "src/api-arguments.h" 8 #include "src/api-arguments.h"
9 #include "src/bootstrapper.h" 9 #include "src/bootstrapper.h"
10 #include "src/codegen.h" 10 #include "src/codegen.h"
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1259 1259
1260 // Restore callee-saved fpu registers. 1260 // Restore callee-saved fpu registers.
1261 __ MultiPopFPU(kCalleeSavedFPU); 1261 __ MultiPopFPU(kCalleeSavedFPU);
1262 1262
1263 // Restore callee saved registers from the stack. 1263 // Restore callee saved registers from the stack.
1264 __ MultiPop(kCalleeSaved | ra.bit()); 1264 __ MultiPop(kCalleeSaved | ra.bit());
1265 // Return. 1265 // Return.
1266 __ Jump(ra); 1266 __ Jump(ra);
1267 } 1267 }
1268 1268
1269 void RegExpExecStub::Generate(MacroAssembler* masm) {
1270 #ifdef V8_INTERPRETED_REGEXP
1271 // This case is handled prior to the RegExpExecStub call.
1272 __ Abort(kUnexpectedRegExpExecCall);
1273 #else // V8_INTERPRETED_REGEXP
1274 // Isolates: note we add an additional parameter here (isolate pointer).
1275 const int kRegExpExecuteArguments = 9;
1276 const int kParameterRegisters = 8;
1277 __ EnterExitFrame(false, kRegExpExecuteArguments - kParameterRegisters);
1278
1279 // Stack pointer now points to cell where return address is to be written.
1280 // Arguments are before that on the stack or in registers, meaning we
1281 // treat the return address as argument 5. Thus every argument after that
1282 // needs to be shifted back by 1. Since DirectCEntryStub will handle
1283 // allocating space for the c argument slots, we don't need to calculate
1284 // that into the argument positions on the stack. This is how the stack will
1285 // look (sp meaning the value of sp at this moment):
1286 // Abi n64:
1287 // [sp + 1] - Argument 9
1288 // [sp + 0] - saved ra
1289 // Abi O32:
1290 // [sp + 5] - Argument 9
1291 // [sp + 4] - Argument 8
1292 // [sp + 3] - Argument 7
1293 // [sp + 2] - Argument 6
1294 // [sp + 1] - Argument 5
1295 // [sp + 0] - saved ra
1296
1297 // Argument 9: Pass current isolate address.
1298 __ li(t1, Operand(ExternalReference::isolate_address(isolate())));
1299 __ Sd(t1, MemOperand(sp, 1 * kPointerSize));
1300
1301 // Argument 8: Indicate that this is a direct call from JavaScript.
1302 __ li(a7, Operand(1));
1303
1304 // Argument 7: Start (high end) of backtracking stack memory area.
1305 ExternalReference address_of_regexp_stack_memory_address =
1306 ExternalReference::address_of_regexp_stack_memory_address(isolate());
1307 ExternalReference address_of_regexp_stack_memory_size =
1308 ExternalReference::address_of_regexp_stack_memory_size(isolate());
1309 __ li(t1, Operand(address_of_regexp_stack_memory_address));
1310 __ Ld(t1, MemOperand(t1, 0));
1311 __ li(t2, Operand(address_of_regexp_stack_memory_size));
1312 __ Ld(t2, MemOperand(t2, 0));
1313 __ daddu(a6, t1, t2);
1314
1315 // Argument 6: Set the number of capture registers to zero to force global
1316 // regexps to behave as non-global. This does not affect non-global regexps.
1317 __ mov(a5, zero_reg);
1318
1319 // Argument 5: static offsets vector buffer.
1320 __ li(
1321 a4,
1322 Operand(ExternalReference::address_of_static_offsets_vector(isolate())));
1323
1324 // Argument 4, a3: End of string data
1325 // Argument 3, a2: Start of string data
1326 CHECK(a3.is(RegExpExecDescriptor::StringEndRegister()));
1327 CHECK(a2.is(RegExpExecDescriptor::StringStartRegister()));
1328
1329 // Argument 2 (a1): Previous index.
1330 CHECK(a1.is(RegExpExecDescriptor::LastIndexRegister()));
1331
1332 // Argument 1 (a0): Subject string.
1333 CHECK(a0.is(RegExpExecDescriptor::StringRegister()));
1334
1335 // Locate the code entry and call it.
1336 Register code_reg = RegExpExecDescriptor::CodeRegister();
1337 __ Daddu(code_reg, code_reg, Operand(Code::kHeaderSize - kHeapObjectTag));
1338 DirectCEntryStub stub(isolate());
1339 stub.GenerateCall(masm, code_reg);
1340
1341 __ LeaveExitFrame(false, no_reg, true);
1342
1343 // Return the smi-tagged result.
1344 __ SmiTag(v0);
1345 __ Ret();
1346 #endif // V8_INTERPRETED_REGEXP
1347 }
1348
1269 1349
1270 static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub) { 1350 static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub) {
1271 // a0 : number of arguments to the construct function 1351 // a0 : number of arguments to the construct function
1272 // a2 : feedback vector 1352 // a2 : feedback vector
1273 // a3 : slot in feedback vector (Smi) 1353 // a3 : slot in feedback vector (Smi)
1274 // a1 : the function to call 1354 // a1 : the function to call
1275 FrameScope scope(masm, StackFrame::INTERNAL); 1355 FrameScope scope(masm, StackFrame::INTERNAL);
1276 const RegList kSavedRegs = 1 << 4 | // a0 1356 const RegList kSavedRegs = 1 << 4 | // a0
1277 1 << 5 | // a1 1357 1 << 5 | // a1
1278 1 << 6 | // a2 1358 1 << 6 | // a2
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3107 kStackUnwindSpace, kInvalidStackOffset, 3187 kStackUnwindSpace, kInvalidStackOffset,
3108 return_value_operand, NULL); 3188 return_value_operand, NULL);
3109 } 3189 }
3110 3190
3111 #undef __ 3191 #undef __
3112 3192
3113 } // namespace internal 3193 } // namespace internal
3114 } // namespace v8 3194 } // namespace v8
3115 3195
3116 #endif // V8_TARGET_ARCH_MIPS64 3196 #endif // V8_TARGET_ARCH_MIPS64
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