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Technology Stocks : Intel Corporation (INTC)
INTC 48.26-0.7%Feb 5 3:59 PM EST

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To: Mark Brophy who wrote (4457)10/21/1996 7:20:00 PM
From: Paul Engel   of 186894
 
Mark - Re:"That first time it translates the
code to the Alpha instruction set and you run at full Alpha speed on
subsequent runs...

If a simple piece of code, with NO BRANCHES or JUMPS, was translated this scenario might hold.

However, as most code contains many conditional branches and jumps, the first pass through a translator may not even ENCOUNTER many of the target branches or jump sequences that will be executed on subsequent passes through conditional loops.

In this manner, the "once-translated" code may not even work the second time time it is executed if the "untranslated" branches are selected differently from the "first pass" through the conditional loops.

The Intel 8080/8085 to 8086 translator worked on object code, not binary code, as I recall. This object code, containing the full listing (target branch addresses, etc.), could be translated in its entirety without loss of code.

Paul
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