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Why don't we have SSSE3 and sse4 instructions?

post #1 of 11
Thread Starter 
I was using pcsx2 emulator today and saw it was only using sse2 instructions. In cpuz i saw that i dont have ssse3 or sse4 instructions. Is my cpu really that old or did amd leave these out for a reason? By the way i dont know exactly what this means i just have a general idea any detail appreciated.
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post #2 of 11
Most likely they didn't need the new instructions in the program they wrote. Also, leaving some instruction sets out increases compatibility with older processors which don't have SSE3 and 4.
post #3 of 11
Thread Starter 
No im saying pcsx2 has ssse3 and sse4 and my phenom 2 does not.
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post #4 of 11
Quote:
Originally Posted by sunwolf View Post

No im saying pcsx2 has ssse3 and sse4 and my phenom 2 does not.

Ohhhh. SEE3 and 4 came out pretty recently. Chances are that SSE3 was introduced when AMD was almost done with the Phenom II architecture and and they didn't have time to redo some parts of the processor. SSE4 was introduced after the Phenom II's where already out.
post #5 of 11
The Phenoms II does have SSE 3 and SSE 4a.
375

SSE 3 was introduced in AMD CPUs when Intel started making 64 bit CPUs as AMD traded the x86-64 instruction set for SSE 3 IIRC, SSE 4a was introduced with the Phenom II.
post #6 of 11
Quote:
Originally Posted by Bitemarks and bloodstains View Post

The Phenoms II does have SSE 3 and SSE 4a.
375
SSE 3 was introduced when Intel started making 64 bit CPUs as AMD traded the x86-64 instruction set for SEE 3 IIRC, SEE 4a was introduced with the Phenom II.

Well, I guess I stand corrected. I was just taking a guess though smile.gif

I wonder why he said his phenom II doesn't support them.
post #7 of 11
Quote:
Originally Posted by Bitemarks and bloodstains View Post

The Phenoms II does have SSE 3 and SSE 4a.
375
SSE 3 was introduced in AMD CPUs when Intel started making 64 bit CPUs as AMD traded the x86-64 instruction set for SSE 3 IIRC, SSE 4a was introduced with the Phenom II.
Quote:
Originally Posted by Alfaa View Post

Well, I guess I stand corrected. I was just taking a guess though smile.gif
I wonder why he said his phenom II doesn't support them.

i exactly know what you are talking about
yes amd has sse3 and sse4a
but pcsx2 uses "ssse3" and "sse4.1" to be exact which the amd processors of the phenom era lack smile.gif

sse3 not equal to ssse3
sse4a not equal to sse4.1 or 4.2
Edited by ghost_z - 3/1/12 at 5:44am
post #8 of 11
4.1 obviously isn't supported. But ssse3 (3 s'es) isn't either, I guess.

Haha, I thought ssse3 was a typeo:

ssse3: Supplemental Streaming SIMD Extensions 3
sse3: Streaming SIMD Extensions 3
post #9 of 11
^^ yes ssse3 or sse(3s)(both are same) is not supported.
post #10 of 11
Quote:
Originally Posted by Alfaa View Post

Well, I guess I stand corrected. I was just taking a guess though smile.gif
I wonder why he said his phenom II doesn't support them.

So, I guess this means that I redact my "correctedness." thumb.gif
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