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/* -*- 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_inl_h
#define jit_x64_SharedICHelpers_x64_inl_h
#include "jit/BaselineFrame.h"
#include "jit/SharedICHelpers.h"
#include "jit/MacroAssembler-inl.h"
namespace js {
namespace jit {
inline void EmitBaselineTailCallVM(TrampolinePtr target, MacroAssembler& masm,
uint32_t argSize) {
#ifdef DEBUG
ScratchRegisterScope scratch(masm);
// We can assume during this that R0 and R1 have been pushed.
// Store frame size without VMFunction arguments for debug assertions.
masm.movq(FramePointer, scratch);
masm.subq(StackPointer, scratch);
masm.subq(Imm32(argSize), scratch);
Address frameSizeAddr(FramePointer,
BaselineFrame::reverseOffsetOfDebugFrameSize());
masm.store32(scratch, frameSizeAddr);
#endif
// Push frame descriptor and perform the tail call.
masm.pushFrameDescriptor(FrameType::BaselineJS);
masm.push(ICTailCallReg);
masm.jump(target);
}
inline void EmitBaselineCallVM(TrampolinePtr target, MacroAssembler& masm) {
masm.pushFrameDescriptor(FrameType::BaselineStub);
masm.call(target);
}
inline void EmitBaselineEnterStubFrame(MacroAssembler& masm, Register) {
#ifdef DEBUG
// Compute frame size. Because the return address is still on the stack,
// this is:
//
// FramePointer
// - StackPointer
// - sizeof(return address)
ScratchRegisterScope scratch(masm);
masm.movq(FramePointer, scratch);
masm.subq(StackPointer, scratch);
masm.subq(Imm32(sizeof(void*)), scratch); // Return address.
Address frameSizeAddr(FramePointer,
BaselineFrame::reverseOffsetOfDebugFrameSize());
masm.store32(scratch, frameSizeAddr);
#endif
// Push the return address that's currently on top of the stack.
masm.Push(Operand(StackPointer, 0));
// Replace the original return address with the frame descriptor.
masm.storePtr(ImmWord(MakeFrameDescriptor(FrameType::BaselineJS)),
Address(StackPointer, sizeof(uintptr_t)));
// Save old frame pointer, stack pointer and stub reg.
masm.Push(FramePointer);
masm.mov(StackPointer, FramePointer);
masm.Push(ICStubReg);
}
} // namespace jit
} // namespace js
#endif /* jit_x64_SharedICHelpers_x64_inl_h */
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