From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- js/src/jit/x64/SharedICHelpers-x64.h | 70 ++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 js/src/jit/x64/SharedICHelpers-x64.h (limited to 'js/src/jit/x64/SharedICHelpers-x64.h') diff --git a/js/src/jit/x64/SharedICHelpers-x64.h b/js/src/jit/x64/SharedICHelpers-x64.h new file mode 100644 index 0000000000..8233db5735 --- /dev/null +++ b/js/src/jit/x64/SharedICHelpers-x64.h @@ -0,0 +1,70 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_x64_SharedICHelpers_x64_h +#define jit_x64_SharedICHelpers_x64_h + +#include "jit/BaselineIC.h" +#include "jit/JitFrames.h" +#include "jit/MacroAssembler.h" +#include "jit/SharedICRegisters.h" + +namespace js { +namespace jit { + +// Distance from Stack top to the top Value inside an IC stub (this is the +// return address). +static const size_t ICStackValueOffset = sizeof(void*); + +inline void EmitRestoreTailCallReg(MacroAssembler& masm) { + masm.Pop(ICTailCallReg); +} + +inline void EmitRepushTailCallReg(MacroAssembler& masm) { + masm.Push(ICTailCallReg); +} + +inline void EmitCallIC(MacroAssembler& masm, CodeOffset* callOffset) { + // The stub pointer must already be in ICStubReg. + // Call the stubcode. + masm.call(Address(ICStubReg, ICStub::offsetOfStubCode())); + *callOffset = CodeOffset(masm.currentOffset()); +} + +inline void EmitReturnFromIC(MacroAssembler& masm) { masm.ret(); } + +inline void EmitBaselineLeaveStubFrame(MacroAssembler& masm) { + Address stubAddr(FramePointer, BaselineStubFrameLayout::ICStubOffsetFromFP); + masm.loadPtr(stubAddr, ICStubReg); + + masm.mov(FramePointer, StackPointer); + masm.Pop(FramePointer); + + // The return address is on top of the stack, followed by the frame + // descriptor. Use a pop instruction to overwrite the frame descriptor + // with the return address. Note that pop increments the stack pointer + // before computing the address. + masm.Pop(Operand(StackPointer, 0)); +} + +template +inline void EmitPreBarrier(MacroAssembler& masm, const AddrType& addr, + MIRType type) { + masm.guardedCallPreBarrier(addr, type); +} + +inline void EmitStubGuardFailure(MacroAssembler& masm) { + // Load next stub into ICStubReg + masm.loadPtr(Address(ICStubReg, ICCacheIRStub::offsetOfNext()), ICStubReg); + + // Return address is already loaded, just jump to the next stubcode. + masm.jmp(Operand(ICStubReg, ICStub::offsetOfStubCode())); +} + +} // namespace jit +} // namespace js + +#endif /* jit_x64_SharedICHelpers_x64_h */ -- cgit v1.2.3