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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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_ARM64 | 5 #if V8_TARGET_ARCH_ARM64 |
6 | 6 |
7 #include "src/api-arguments.h" | 7 #include "src/api-arguments.h" |
8 #include "src/arm64/assembler-arm64-inl.h" | 8 #include "src/arm64/assembler-arm64-inl.h" |
9 #include "src/arm64/frames-arm64.h" | 9 #include "src/arm64/frames-arm64.h" |
10 #include "src/arm64/macro-assembler-arm64-inl.h" | 10 #include "src/arm64/macro-assembler-arm64-inl.h" |
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1260 // Restore the callee-saved registers and return. | 1260 // Restore the callee-saved registers and return. |
1261 DCHECK(jssp.Is(__ StackPointer())); | 1261 DCHECK(jssp.Is(__ StackPointer())); |
1262 __ Mov(csp, jssp); | 1262 __ Mov(csp, jssp); |
1263 __ SetStackPointer(csp); | 1263 __ SetStackPointer(csp); |
1264 __ PopCalleeSavedRegisters(); | 1264 __ PopCalleeSavedRegisters(); |
1265 // After this point, we must not modify jssp because it is a callee-saved | 1265 // After this point, we must not modify jssp because it is a callee-saved |
1266 // register which we have just restored. | 1266 // register which we have just restored. |
1267 __ Ret(); | 1267 __ Ret(); |
1268 } | 1268 } |
1269 | 1269 |
1270 void RegExpExecStub::Generate(MacroAssembler* masm) { | |
1271 #ifdef V8_INTERPRETED_REGEXP | |
1272 // This case is handled prior to the RegExpExecStub call. | |
1273 __ Abort(kUnexpectedRegExpExecCall); | |
1274 #else // V8_INTERPRETED_REGEXP | |
1275 // Isolates: note we add an additional parameter here (isolate pointer). | |
1276 __ EnterExitFrame(false, x10, 1); | |
1277 DCHECK(csp.Is(__ StackPointer())); | |
1278 | |
1279 // We have 9 arguments to pass to the regexp code, therefore we have to pass | |
1280 // one on the stack and the rest as registers. | |
1281 | |
1282 // Note that the placement of the argument on the stack isn't standard | |
1283 // AAPCS64: | |
1284 // csp[0]: Space for the return address placed by DirectCEntryStub. | |
1285 // csp[8]: Argument 9, the current isolate address. | |
1286 | |
1287 __ Mov(x10, ExternalReference::isolate_address(isolate())); | |
1288 __ Poke(x10, kPointerSize); | |
1289 | |
1290 // Argument 1 (x0): Subject string. | |
1291 CHECK(x0.is(RegExpExecDescriptor::StringRegister())); | |
1292 | |
1293 // Argument 2 (x1): Previous index, already there. | |
1294 CHECK(x1.is(RegExpExecDescriptor::LastIndexRegister())); | |
1295 | |
1296 // Argument 3 (x2): Input start. | |
1297 // Argument 4 (x3): Input end. | |
1298 CHECK(x2.is(RegExpExecDescriptor::StringStartRegister())); | |
1299 CHECK(x3.is(RegExpExecDescriptor::StringEndRegister())); | |
1300 | |
1301 // Argument 5 (x4): static offsets vector buffer. | |
1302 __ Mov(x4, ExternalReference::address_of_static_offsets_vector(isolate())); | |
1303 | |
1304 // Argument 6 (x5): Set the number of capture registers to zero to force | |
1305 // global regexps to behave as non-global. This stub is not used for global | |
1306 // regexps. | |
1307 __ Mov(x5, 0); | |
1308 | |
1309 // Argument 7 (x6): Start (high end) of backtracking stack memory area. | |
1310 ExternalReference address_of_regexp_stack_memory_address = | |
1311 ExternalReference::address_of_regexp_stack_memory_address(isolate()); | |
1312 ExternalReference address_of_regexp_stack_memory_size = | |
1313 ExternalReference::address_of_regexp_stack_memory_size(isolate()); | |
1314 __ Mov(x10, address_of_regexp_stack_memory_address); | |
1315 __ Ldr(x10, MemOperand(x10)); | |
1316 __ Mov(x11, address_of_regexp_stack_memory_size); | |
1317 __ Ldr(x11, MemOperand(x11)); | |
1318 __ Add(x6, x10, x11); | |
1319 | |
1320 // Argument 8 (x7): Indicate that this is a direct call from JavaScript. | |
1321 __ Mov(x7, 1); | |
1322 | |
1323 // Locate the code entry and call it. | |
1324 Register code_object = RegExpExecDescriptor::CodeRegister(); | |
1325 __ Add(code_object, code_object, Code::kHeaderSize - kHeapObjectTag); | |
1326 DirectCEntryStub stub(isolate()); | |
1327 stub.GenerateCall(masm, code_object); | |
1328 | |
1329 __ LeaveExitFrame(false, x10, true); | |
1330 | |
1331 // Return the smi-tagged result. | |
1332 __ SmiTag(x0); | |
1333 __ Ret(); | |
1334 #endif | |
1335 } | |
1336 | |
1337 | 1270 |
1338 static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub, | 1271 static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub, |
1339 Register argc, Register function, | 1272 Register argc, Register function, |
1340 Register feedback_vector, Register index, | 1273 Register feedback_vector, Register index, |
1341 Register new_target) { | 1274 Register new_target) { |
1342 FrameScope scope(masm, StackFrame::INTERNAL); | 1275 FrameScope scope(masm, StackFrame::INTERNAL); |
1343 | 1276 |
1344 // Number-of-arguments register must be smi-tagged to call out. | 1277 // Number-of-arguments register must be smi-tagged to call out. |
1345 __ SmiTag(argc); | 1278 __ SmiTag(argc); |
1346 __ Push(argc, function, feedback_vector, index); | 1279 __ Push(argc, function, feedback_vector, index); |
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3230 kStackUnwindSpace, NULL, spill_offset, | 3163 kStackUnwindSpace, NULL, spill_offset, |
3231 return_value_operand, NULL); | 3164 return_value_operand, NULL); |
3232 } | 3165 } |
3233 | 3166 |
3234 #undef __ | 3167 #undef __ |
3235 | 3168 |
3236 } // namespace internal | 3169 } // namespace internal |
3237 } // namespace v8 | 3170 } // namespace v8 |
3238 | 3171 |
3239 #endif // V8_TARGET_ARCH_ARM64 | 3172 #endif // V8_TARGET_ARCH_ARM64 |
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