inaccurate report of (S)SSE3 support

[Hirato]

Steam's report

Processor Information:
    Vendor:  AuthenticAMD
    Speed: 3200 Mhz
    6 logical processors
    6 physical processors
    HyperThreading:  Unsupported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Supported
    SSE41:  Unsupported
    SSE42:  Unsupported

truncated version of cat /proc/cpuinfo

flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt cpb hw_pstate npt lbrv svm_lock nrip_save pausefilter

Filtered for anything containing SSE

flags           :   sse sse2 sse4a misalignsse

In short, my CPU supports neither SSE3 or SSSE3, steam's system information feature claims otherwise.

[Tele42]

The cpuinfo flag for SSE3 is "pni"

[gdrewb-valve]

Looks like this should be closed?

[Tele42]

not yet, SSSE3 is unaccounted for.

[gdrewb-valve]

The detection code looks correct; what is your exact CPU model?

[Hirato]

AMD Phenom(tm) II X6 1090T Processor

[Tele42]

So http://www.cpu-world.com/CPUs/K10/AMD-Phenom%20II%20X6%201090T%20Black%20Edition%20-%20HDT90ZFBK6DGR%20%28HDT90ZFBGRBOX%29.html and the general consensus around the web says that this processor does not have ssse3.

[johndrinkwater]

Same inaccuracy with SSSE3 and AMD Phenom(tm) II X4 840 Processor

flags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save

[V10lator]

Same here (steam says my CPU has SSSE3 support while it hasn't) on AMD Athlon(tm) II X3 455 Processor

[gdrewb-valve]

I found the problem, this is a bug in Steam that we'll fix in an upcoming client.

[gdrewb-valve]

I think yesterday's beta client has the fix for this. Do you still see it after updating?

[Hirato]

SSSE3: Supported
Yes.

[gdrewb-valve]

Sorry, looks like the fix didn't make this cycle, it should be in the next beta.

[Hirato]

Got a new build today, It now reports unsupported, which is the correct answer for SSSE3.

I guess I'll close it.
Cheers!