On a Woodcrest-based Dell Precision Workstation 490 running snv_58:
helmwige% psrinfo -vp
The physical processor has 2 virtual processors (0 2)
x86 (GenuineIntel family 6 model 15 step 6 clock 2992 MHz)
Intel(r) Xeon(r) CPU 5160 @ 3.00GHz
The physical processor has 2 virtual processors (1 3)
x86 (GenuineIntel family 6 model 15 step 6 clock 2992 MHz)
Intel(r) Xeon(r) CPU 5160 @ 3.00GHz
helmwige% uname -a
SunOS helmwige 5.11 snv_58 i86pc i386 i86pc
The SSSE3 (Supplemental SSE3) capability isn't advertised by the kernel:
helmwige% isainfo -x
amd64: cx16 mon sse3 sse2 sse fxsr mmx cmov amd_sysc cx8 tsc fpu
i386: ahf cx16 mon sse3 sse2 sse fxsr mmx cmov sep cx8 tsc fpu
The September 2006 edition of the "Intel Processor Identification
and the CPUID Instruction Application Note 485", a.k.a.
http://download.intel.com/design/Xeon/applnots/24161831.pdf
Table 3-5 lists bit 9 of the feature flag values reported in ecx
as indicating SSSE3 support:
helmwige% prtpicl -v -c cpu | grep cpuid-features-ecx | head -1
:cpuid-features-ecx 0x4e3bd
The kernel needs to advertise this new hwcap bit ASAP.