[Bug 1851095] [NEW] [feature request] awareness of instructions that are well emulated

[Shawn Landden]

Public bug reported:

While qemu's scalar emulation tends to be excellent, qemu's SIMD
emulation tends to be incorrect (except for arm64 from x86_64)--i have
found this both for mipsel and arm32. Until these code paths are
audited, which is probably a large job, it would be nice if qemu knew
its emulation of this class of instructions was not very good, and thus
it would give up on finding these instructions if a "careful" operation
is passed.

** Affects: qemu
     Importance: Undecided
         Status: New

** Description changed:

  While qemu's scalar emulation tends to be excellent, qemu's SIMD
- emulation tends to be incorrect (except for arm64 from x86_64). Until
- these code paths are audited, which is probably a large job, it would be
- nice if qemu knew its emulation of this class of instructions was not
- very good, and thus it would give up on finding these instructions if a
- "careful" operation is passed.
+ emulation tends to be incorrect (except for arm64 from x86_64)--i have
+ found this both for mipsel and arm32. Until these code paths are
+ audited, which is probably a large job, it would be nice if qemu knew
+ its emulation of this class of instructions was not very good, and thus
+ it would give up on finding these instructions if a "careful" operation
+ is passed.

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https://bugs.launchpad.net/bugs/1851095

Title:
  [feature request] awareness of instructions that are well emulated

Status in QEMU:
  New

Bug description:
  While qemu's scalar emulation tends to be excellent, qemu's SIMD
  emulation tends to be incorrect (except for arm64 from x86_64)--i have
  found this both for mipsel and arm32. Until these code paths are
  audited, which is probably a large job, it would be nice if qemu knew
  its emulation of this class of instructions was not very good, and
  thus it would give up on finding these instructions if a "careful"
  operation is passed.

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