[Qemu-devel] [Bug 1590336] [NEW] qemu-arm does not reject vrintz on non-v8 cpu

[Christophe Lyon]

Public bug reported:

Hello,

It seems that qemu-arm does not reject some v8-only instructions as it
should, but executes them "correctly".

For instance, while compiling/running some of the GCC ARM instrinsics tests, we 
noticed that
vrintz should be rejected on cortex-a9 for instance, while it is executed as if 
the instruction was supported.

objdump says:
   1074c:       f3fa05a0        vrintz.f32      d16, d16
and qemu -d in_asm says:
0x0001074c:  f3fa05a0      vabal.u<illegal width 64>    q8, d26, d16

The problem is still present in qemu-2.6.0

** Affects: qemu
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1590336

Title:
  qemu-arm does not reject vrintz on non-v8 cpu

Status in QEMU:
  New

Bug description:
  Hello,

  It seems that qemu-arm does not reject some v8-only instructions as it
  should, but executes them "correctly".

  For instance, while compiling/running some of the GCC ARM instrinsics tests, 
we noticed that
  vrintz should be rejected on cortex-a9 for instance, while it is executed as 
if the instruction was supported.

  objdump says:
     1074c:       f3fa05a0        vrintz.f32      d16, d16
  and qemu -d in_asm says:
  0x0001074c:  f3fa05a0      vabal.u<illegal width 64>    q8, d26, d16

  The problem is still present in qemu-2.6.0

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1590336/+subscriptions