master branch: SIGILL, Illegal instruction.

[NIIBE Yutaka]

Hello,

It seems that vmovdqa instruction is not supported by all processors.

On my machine (Acer Chromebook C720) with:
==========================  One of processors:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 69
model name	: Intel(R) Celeron(R) 2955U @ 1.40GHz
stepping	: 1
microcode	: 0x25
cpu MHz		: 920.937
cache size	: 2048 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 2
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer xsave rdrand lahf_lm abm cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust erms invpcid xsaveopt dtherm arat pln pts md_clear flush_l1d
bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds
bogomips	: 2793.74
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:
==========================

Starting program: /home/gniibe/work/build-libgcrypt/tests/t-mpi-bit 

Program received signal SIGILL, Illegal instruction.
_gcry_sha1_transform_amd64_ssse3 () at ../../libgcrypt/cipher/sha1-ssse3-amd64.S:404
404	  vmovdqa Wtmp0, (3*16)(%rsp);
--