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Unified Diff: src/x87/code-stubs-x87.cc

Issue 929763002: X87: Implement ES6 rest parameters. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 10 months ago
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Index: src/x87/code-stubs-x87.cc
diff --git a/src/x87/code-stubs-x87.cc b/src/x87/code-stubs-x87.cc
index 7cb35af1fc35075dd5d514a3cb458ac17dee5cfe..5e69b809b05cbd9abcd70b33ea481acacf5cdb76 100644
--- a/src/x87/code-stubs-x87.cc
+++ b/src/x87/code-stubs-x87.cc
@@ -840,6 +840,31 @@ void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) {
}
+void RestParamAccessStub::GenerateNew(MacroAssembler* masm) {
+ // esp[0] : return address
+ // esp[4] : index of rest parameter
+ // esp[8] : number of parameters
+ // esp[12] : receiver displacement
+
+ // Check if the calling frame is an arguments adaptor frame.
+ Label runtime;
+ __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
+ __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset));
+ __ cmp(ecx, Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
+ __ j(not_equal, &runtime);
+
+ // Patch the arguments.length and the parameters pointer.
+ __ mov(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset));
+ __ mov(Operand(esp, 2 * kPointerSize), ecx);
+ __ lea(edx, Operand(edx, ecx, times_2,
+ StandardFrameConstants::kCallerSPOffset));
+ __ mov(Operand(esp, 3 * kPointerSize), edx);
+
+ __ bind(&runtime);
+ __ TailCallRuntime(Runtime::kNewRestParam, 3, 1);
+}
+
+
void RegExpExecStub::Generate(MacroAssembler* masm) {
// Just jump directly to runtime if native RegExp is not selected at compile
// time or if regexp entry in generated code is turned off runtime switch or
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