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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_riscv64_SharedICHelpers_riscv64_inl_h
#define jit_riscv64_SharedICHelpers_riscv64_inl_h
#include "jit/SharedICHelpers.h"
namespace js {
namespace jit {
inline void EmitBaselineTailCallVM(TrampolinePtr target, MacroAssembler& masm,
uint32_t argSize) {
#ifdef DEBUG
Register scratch = R2.scratchReg();
// Compute frame size.
masm.movePtr(FramePointer, scratch);
masm.subPtr(StackPointer, scratch);
// Store frame size without VMFunction arguments for debug assertions.
masm.subPtr(Imm32(argSize), scratch);
Address frameSizeAddr(FramePointer,
BaselineFrame::reverseOffsetOfDebugFrameSize());
masm.store32(scratch, frameSizeAddr);
masm.addPtr(Imm32(argSize), scratch);
#endif
// Push frame descriptor and perform the tail call.
masm.pushFrameDescriptor(FrameType::BaselineJS);
MOZ_ASSERT(ICTailCallReg == ra);
// The return address will be pushed by the VM wrapper, for compatibility
// with direct calls. Refer to the top of generateVMWrapper().
// ICTailCallReg (ra) 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.movePtr(FramePointer, scratch);
masm.subPtr(StackPointer, scratch);
Address frameSizeAddr(FramePointer,
BaselineFrame::reverseOffsetOfDebugFrameSize());
masm.store32(scratch, frameSizeAddr);
#endif
// Note: when making changes here, don't forget to update
// BaselineStubFrame if needed.
// 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.movePtr(StackPointer, FramePointer);
masm.Push(ICStubReg);
// Stack should remain aligned.
masm.assertStackAlignment(sizeof(Value), 0);
}
} // namespace jit
} // namespace js
#endif /* jit_riscv64_SharedICHelpers_riscv64_inl_h */
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