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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /js/src/jit/arm/SharedICHelpers-arm-inl.h | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | js/src/jit/arm/SharedICHelpers-arm-inl.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/js/src/jit/arm/SharedICHelpers-arm-inl.h b/js/src/jit/arm/SharedICHelpers-arm-inl.h new file mode 100644 index 0000000000..2943bafbd8 --- /dev/null +++ b/js/src/jit/arm/SharedICHelpers-arm-inl.h @@ -0,0 +1,79 @@ +/* -*- 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 */ |