[Qemu-devel] [Bug 1308381] Re: illegal instructions for AArch64 ARMv8

[Alex Bennée]

I've sent this patch to the mailing list but it fixes the attached test
case and has been tested with risu patterns.

** Patch added: "fix"
   
https://bugs.launchpad.net/qemu/+bug/1308381/+attachment/4085353/+files/0001-target-arm-A64-fix-unallocated-test-of-scalar-SQXTUN.patch

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https://bugs.launchpad.net/bugs/1308381

Title:
  illegal instructions for AArch64 ARMv8

Status in QEMU:
  New

Bug description:
  The test case is in the attachment. To reproduce as following (I tried both 
GCC and Clang):
  $aarch64-linux-gnu-gcc qemu.c -o test
  $./test
  qemu: uncaught target signal 4 (Illegal instruction) - core dumped
  Illegal instruction (core dumped)

  In the test case, 3 intrinsics are tested: vqmovunh_s16,  vqmovuns_s32, 
vqmovund_s64. They will be compiled into instructions:
  SQXTUN Bd, Hn
  SQXTUN Hd, Sn
  SQXTUN Sd, Dn.

  QEMU is get from trunk git://git.qemu.org/qemu.git. Other instructions
  work well. It seems that these instructions are not supported in QEMU.
  Is this a bug?

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