This from the AMD site:
SSE Support in AMD Processors
SSE (Streaming SIMD Extensions) support is included in AMD's 3Dnow!™ Professional technology, which is supported in all Model 8 and Model 6 AMD Athlon™ processors (AMD Athlon XP, AMD Athlon MP, mobile AMD Athlon 4) and Model 7 AMD Duron™ processors.
The original Model 1 and Model 2 AMD Athlon processors and Model 3 AMD Duron processors do not support SSE as a whole, but do support certain SSE instructions, including software prefetch instructions and streaming store instructions (MOVNTQ). These instructions are included in Enhanced 3DNow! technology, which is supported by these processors.
To determine whether an installed processor supports SSE, use a utility such as AMD CPUID, which can be downloaded from the AMD Processor Utilities and Updates page. CPUID feature flags should be used to determine instruction set support, rather than deriving the processor's capabilities from vendor specifiers combined with CPUID model numbers. Further qualification of SSE should be done by checking for OS support. Even if SSE support is present in the processor, it may not be usable if the OS lacks support for the additional architected registers.
For additional information, refer to the technical document titled, "AMD Processor Recognition Application Note", which can be downloaded from the AMD Athlon™ XP Processor Tech Docs page. In particular, note:
Table 4 - "Summary of Standard and Extended Feature Bits"
Tables 6-11 - "Standard Feature Flag Descriptions"
Subsection titled, "Determining Instruction Set Support", under the chapter, "Identifying Supported Features".
Didn't look at the tables, etc. mentioned. Gotta shower and off to work.
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