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To: fyodor_ who wrote (19082)11/14/2000 5:51:32 PM
From: Charles RRead Replies (2) | Respond to of 275872
 
fyo,

<SSE2 has instructions for double precision FP, as well as some integer SIMD. It does NOT include single precision FP instructions.>

I am not familiar with either the composition of SpecFP code or the software architecture for games but I gather there is significant advantage to packing twice as many vector operations in SSE2 as you can in SSE.

Chuck



To: fyodor_ who wrote (19082)11/14/2000 7:57:10 PM
From: PetzRead Replies (3) | Respond to of 275872
 
fyo, P4's SSE2 could speed up SPECfp by 30% and I am sure that the unavailable Intel compiler that will be used for the SPECfp benchmark uses SSE2.

Programming double precision SPECfp stuff using SSE2's many new registers is a lot more efficient than messing around with the x86 stack.

Petz


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