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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /js/src/jit/riscv64/SharedICHelpers-riscv64.h | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/jit/riscv64/SharedICHelpers-riscv64.h')
-rw-r--r-- | js/src/jit/riscv64/SharedICHelpers-riscv64.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/js/src/jit/riscv64/SharedICHelpers-riscv64.h b/js/src/jit/riscv64/SharedICHelpers-riscv64.h new file mode 100644 index 0000000000..3411c6727e --- /dev/null +++ b/js/src/jit/riscv64/SharedICHelpers-riscv64.h @@ -0,0 +1,77 @@ +/* -*- 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_h +#define jit_riscv64_SharedICHelpers_riscv64_h +#include "jit/BaselineIC.h" +#include "jit/JitFrames.h" +#include "jit/MacroAssembler.h" +#include "jit/SharedICRegisters.h" +namespace js { +namespace jit { + +static const size_t ICStackValueOffset = 0; + +inline void EmitRestoreTailCallReg(MacroAssembler& masm) { + // No-op on RISC-V because ra register is always holding the return address. +} + +inline void EmitRepushTailCallReg(MacroAssembler& masm) { + // No-op on RISC-V because ra register is always holding the return address. +} +inline void EmitCallIC(MacroAssembler& masm, CodeOffset* callOffset) { + // The stub pointer must already be in ICStubReg. + // Load stubcode pointer from the ICStub. + // R2 won't be active when we call ICs, so we can use it as scratch. + masm.loadPtr(Address(ICStubReg, ICStub::offsetOfStubCode()), R2.scratchReg()); + + // Call the stubcode via a direct jump-and-link + masm.call(R2.scratchReg()); + *callOffset = CodeOffset(masm.currentOffset()); +} +inline void EmitReturnFromIC(MacroAssembler& masm) { masm.branch(ra); } +inline void EmitBaselineLeaveStubFrame(MacroAssembler& masm) { + masm.loadPtr( + Address(FramePointer, BaselineStubFrameLayout::ICStubOffsetFromFP), + ICStubReg); + + masm.movePtr(FramePointer, StackPointer); + masm.Pop(FramePointer); + + // Load the return address. + masm.Pop(ICTailCallReg); + + // Discard the frame descriptor. + { + UseScratchRegisterScope temps(&masm); + Register scratch2 = temps.Acquire(); + masm.Pop(scratch2); + } + + masm.checkStackAlignment(); +} + +inline void EmitStubGuardFailure(MacroAssembler& masm) { + // Load next stub into ICStubReg + masm.loadPtr(Address(ICStubReg, ICCacheIRStub::offsetOfNext()), ICStubReg); + + // Return address is already loaded, just jump to the next stubcode. + MOZ_ASSERT(ICTailCallReg == ra); + masm.jump(Address(ICStubReg, ICStub::offsetOfStubCode())); +} +template <typename AddrType> +inline void EmitPreBarrier(MacroAssembler& masm, const AddrType& addr, + MIRType type) { + // On RISC-V, $ra is clobbered by guardedCallPreBarrier. Save it first. + masm.push(ra); + masm.guardedCallPreBarrier(addr, type); + masm.pop(ra); +} + +} // namespace jit +} // namespace js + +#endif /* jit_riscv64_SharedICHelpers_riscv64_h */ |