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Unified Diff: src/arm/code-stubs-arm.cc

Issue 2827243005: Revert of [regexp] Remove remainder of native RegExpExecStub (Closed)
Patch Set: Created 3 years, 8 months ago
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Index: src/arm/code-stubs-arm.cc
diff --git a/src/arm/code-stubs-arm.cc b/src/arm/code-stubs-arm.cc
index 2459f987672488293393aa825d6ab719af4bf23a..9bdc4851a1e9b7fe9a0601a8b42f80780c1f0ae8 100644
--- a/src/arm/code-stubs-arm.cc
+++ b/src/arm/code-stubs-arm.cc
@@ -1145,6 +1145,75 @@
__ ldm(ia_w, sp, kCalleeSaved | pc.bit());
}
+void RegExpExecStub::Generate(MacroAssembler* masm) {
+#ifdef V8_INTERPRETED_REGEXP
+ // This case is handled prior to the RegExpExecStub call.
+ __ Abort(kUnexpectedRegExpExecCall);
+#else // V8_INTERPRETED_REGEXP
+ // Isolates: note we add an additional parameter here (isolate pointer).
+ const int kRegExpExecuteArguments = 9;
+ const int kParameterRegisters = 4;
+ __ EnterExitFrame(false, kRegExpExecuteArguments - kParameterRegisters);
+
+ // Stack pointer now points to cell where return address is to be written.
+ // Arguments are before that on the stack or in registers.
+
+ // Argument 9 (sp[20]): Pass current isolate address.
+ __ mov(r5, Operand(ExternalReference::isolate_address(isolate())));
+ __ str(r5, MemOperand(sp, 5 * kPointerSize));
+
+ // Argument 8 (sp[16]): Indicate that this is a direct call from JavaScript.
+ __ mov(r5, Operand(1));
+ __ str(r5, MemOperand(sp, 4 * kPointerSize));
+
+ // Argument 7 (sp[12]): Start (high end) of backtracking stack memory area.
+ ExternalReference address_of_regexp_stack_memory_address =
+ ExternalReference::address_of_regexp_stack_memory_address(isolate());
+ ExternalReference address_of_regexp_stack_memory_size =
+ ExternalReference::address_of_regexp_stack_memory_size(isolate());
+ __ mov(r5, Operand(address_of_regexp_stack_memory_address));
+ __ ldr(r5, MemOperand(r5, 0));
+ __ mov(r6, Operand(address_of_regexp_stack_memory_size));
+ __ ldr(r6, MemOperand(r6, 0));
+ __ add(r5, r5, Operand(r6));
+ __ str(r5, MemOperand(sp, 3 * kPointerSize));
+
+ // Argument 6: Set the number of capture registers to zero to force global
+ // regexps to behave as non-global. This does not affect non-global regexps.
+ __ mov(r5, Operand::Zero());
+ __ str(r5, MemOperand(sp, 2 * kPointerSize));
+
+ // Argument 5 (sp[4]): static offsets vector buffer.
+ __ mov(
+ r5,
+ Operand(ExternalReference::address_of_static_offsets_vector(isolate())));
+ __ str(r5, MemOperand(sp, 1 * kPointerSize));
+
+ // Argument 4: End of string data
+ // Argument 3: Start of string data
+ CHECK(r3.is(RegExpExecDescriptor::StringEndRegister()));
+ CHECK(r2.is(RegExpExecDescriptor::StringStartRegister()));
+
+ // Argument 2 (r1): Previous index.
+ CHECK(r1.is(RegExpExecDescriptor::LastIndexRegister()));
+
+ // Argument 1 (r0): Subject string.
+ CHECK(r0.is(RegExpExecDescriptor::StringRegister()));
+
+ // Locate the code entry and call it.
+ Register code_reg = RegExpExecDescriptor::CodeRegister();
+ __ add(code_reg, code_reg, Operand(Code::kHeaderSize - kHeapObjectTag));
+
+ DirectCEntryStub stub(isolate());
+ stub.GenerateCall(masm, code_reg);
+
+ __ LeaveExitFrame(false, no_reg, true);
+
+ __ SmiTag(r0);
+ __ Ret();
+#endif // V8_INTERPRETED_REGEXP
+}
+
static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub) {
// r0 : number of arguments to the construct function
// r1 : the function to call
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