libcrypto: Illegal instruction ``pshufb'' on non-sse3 CPU

[Timo Buhrmester <fstd.lkml%gmail.com@localhost>]

As of late, when building (and installing) -head I end up with a libcrypto causing SIGILL, apparently due to using the ``pshufb'' instruction (which I believe is part of the SSE3 extension).

My CPU is, according to /proc/cpuinfo:
> processor	: 0
> vendor_id	: AuthenticAMD
> cpu family	: 15
> model		: 6
> model name	: AMD Athlon(tm) II X2 265 Processor
> stepping	: 3
> cpu MHz		: 3311.46
> fdiv_bug	: no
> fpu		: yes
> fpu_exception	: yes
> cpuid level	: 5
> wp		: yes
> flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht 
> 
> processor	: 1
> [another core]

(No sse3)


As far as gdb is concerned, in libcrypto.so.8.4, this is the point where it blows up:
   [...]
  >0x7f7ff6f3ba87  pshufb %xmm6,%xmm0   ;bang
   0x7f7ff6f3ba8c  add    $0x40,%r9     ;for context
   0x7f7ff6f3ba90  pshufb %xmm6,%xmm1
   0x7f7ff6f3ba95  pshufb %xmm6,%xmm2
   0x7f7ff6f3ba9a  pshufb %xmm6,%xmm3
   0x7f7ff6f3ba9f  paddd  %xmm9,%xmm0

(Core dump available on request)

The assembly code originates from crypto/external/bsd/openssl/dist/crypto/sha/asm/sha1-x86_64.pl (around line 346), but seems to have been untouched for too long to be the culprit (a -head build in March didn't provoke the problem yet).

Any ideas?