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Technology Stocks : Advanced Micro Devices - Moderated (AMD)
AMD 215.65+0.3%3:59 PM EST

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To: brushwud who wrote (87488)8/22/2002 11:05:49 PM
From: combjellyRead Replies (1) of 275872
 
"I wouldn't think SPECint would have ANY 64-bit literal constants"

I haven't looked at the SPECint code, but it likely has 32 bit constants which get padded out to 64 bits, hence the extra space...

"The average instruction length should be greater due to the extra bits to address the extra registers, but the elimination of the "spill/fill memory references" he mentions should mean fewer instructions."

More than that. There are a fair number of bytes added to express the extended x86 instructions and such. The big downside of x86-64 is the average instruction size goes up.
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