[L] Change in dart/sdk[main]: [vm] Nicer disassembly for RISC-V hints.

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Ryan Macnak (Gerrit)

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Dec 9, 2025, 5:25:17 PM12/9/25
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Commit message:
[vm] Nicer disassembly for RISC-V hints.

Add missing byte and halfword compare-and-swap.
Add missing clear of reservation after SC.
Define XLEN aliases for the AMOs.
Add wait-on-reservation-set.
More systematically print state on fault.

TEST=ci
Change-Id: Ia07e638a6e08cd40eecc1f8f7d242fd94ef2f2d4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/467200
Commit-Queue: Ryan Macnak <rma...@google.com>
Reviewed-by: Alexander Aprelev <a...@google.com>
Files:
  • M runtime/vm/compiler/asm_intrinsifier_riscv.cc
  • M runtime/vm/compiler/assembler/assembler_riscv.cc
  • M runtime/vm/compiler/assembler/assembler_riscv.h
  • M runtime/vm/compiler/assembler/assembler_riscv_test.cc
  • M runtime/vm/compiler/assembler/disassembler_riscv.cc
  • M runtime/vm/compiler/stub_code_compiler_riscv.cc
  • M runtime/vm/constants_riscv.h
  • M runtime/vm/simulator_riscv.cc
  • M runtime/vm/simulator_riscv.h
Change size: L
Delta: 9 files changed, 345 insertions(+), 129 deletions(-)
Branch: refs/heads/main
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