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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/jit/x64/SharedICHelpers-x64-inl.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/jit/x64/SharedICHelpers-x64-inl.h')
-rw-r--r-- | js/src/jit/x64/SharedICHelpers-x64-inl.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/js/src/jit/x64/SharedICHelpers-x64-inl.h b/js/src/jit/x64/SharedICHelpers-x64-inl.h new file mode 100644 index 0000000000..c40eb45c74 --- /dev/null +++ b/js/src/jit/x64/SharedICHelpers-x64-inl.h @@ -0,0 +1,80 @@ +/* -*- 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 */ |