/* -*- 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. // ICTailCallReg (lr) already contains the return address (as we keep // it there through the stub calls), but the VMWrapper code being called // expects the return address to also be pushed on the stack. static_assert(ICTailCallReg == lr); masm.pushFrameDescriptor(FrameType::BaselineJS); masm.push(lr); 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 */