[Qemu-devel] [Bug 1759333] Re: Illegal Instruction with HVF when encountering SSE instructions in the emulator

[Alex Bennée]

** Tags added: tcg x86

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https://bugs.launchpad.net/bugs/1759333

Title:
  Illegal Instruction with HVF when encountering SSE instructions in the
  emulator

Status in QEMU:
  New

Bug description:
  The latest version of QEMU doesn't seem to support emulated SSE instructions 
with HVF acceleration on macOS.
  The decoder will treat SSE instructions as invalid, get the instruction sizes 
wrong and quickly crash the guest OS because of illegal instructions.
  After having a quick look at target/i386/hvf/x86_decode.c, it seems that SSE 
instruction emulation isn't implemented in the current version of the x86 
emulator.

  A way to reproduce the issue is to run a macOS 10.13 guest with HVF
  acceleration enabled, this will crash in the guest once it's loading
  up the GUI (and also print a "Unimplemented handler" warning from
  target/i386/hvf/x86_emu.c).

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