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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_arm_SharedICHelpers_arm_inl_h
#define jit_arm_SharedICHelpers_arm_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
// We assume during this that R0 and R1 have been pushed, and that R2 is
// unused.
static_assert(R2 == ValueOperand(r1, r0));
// Store frame size without VMFunction arguments for debug assertions.
masm.movePtr(FramePointer, r0);
masm.ma_sub(StackPointer, r0);
masm.sub32(Imm32(argSize), r0);
Address frameSizeAddr(FramePointer,
BaselineFrame::reverseOffsetOfDebugFrameSize());
masm.store32(r0, frameSizeAddr);
#endif
// Push frame descriptor and perform the tail call.
masm.pushFrameDescriptor(FrameType::BaselineJS);
static_assert(ICTailCallReg == lr);
// The return address will be pushed by the VM wrapper, for compatibility
// with direct calls. Refer to the top of generateVMWrapper().
// ICTailCallReg (lr) already contains the return address (as we keep
// it there through the stub calls).
masm.jump(target);
}
inline void EmitBaselineCallVM(TrampolinePtr target, MacroAssembler& masm) {
masm.pushFrameDescriptor(FrameType::BaselineStub);
masm.call(target);
}
inline void EmitBaselineEnterStubFrame(MacroAssembler& masm, Register scratch) {
MOZ_ASSERT(scratch != ICTailCallReg);
#ifdef DEBUG
// Compute frame size.
masm.mov(FramePointer, scratch);
masm.ma_sub(StackPointer, scratch);
Address frameSizeAddr(FramePointer,
BaselineFrame::reverseOffsetOfDebugFrameSize());
masm.store32(scratch, frameSizeAddr);
#endif
// Push frame descriptor and return address.
masm.PushFrameDescriptor(FrameType::BaselineJS);
masm.Push(ICTailCallReg);
// Save old frame pointer, stack pointer and stub reg.
masm.Push(FramePointer);
masm.mov(StackPointer, FramePointer);
masm.Push(ICStubReg);
// We pushed 4 words, so the stack is still aligned to 8 bytes.
masm.checkStackAlignment();
}
} // namespace jit
} // namespace js
#endif /* jit_arm_SharedICHelpers_arm_inl_h */
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