Formerly About Advanced Micro Devices Message Board

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Politics : Formerly About Advanced Micro Devices

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To: Elmer who wrote (30978)	4/6/1998 7:00:00 PM
From: Petz	of 1581246

Elmer, re:<FPU bugs> The AMD bugs are much less serious than Intel "FDIV" With "FDIV" thousands of divisors map to the bad lookup table entry, and EVERY numerator will cause an error with that denominator. With the AMD FMUL bugs 1. It only happens in extended precision mode, which only a handful of applications use 2. There are only 8 64 bit multipliers for which the error can occur (compared to THOUSANDS of FDIV divisors) 3. For each one of these, there are only a few multiplicands which can cause the error; compare this with EVERY numerator for the Intel bug 4. NO COMMERCIAL APPLICATION HAS EVER BEEN DEMONSTRATED TO REPRODUCE THE BUG whereas the Intel bug could be demonstrated easily using any spreadsheet program ever invented. The only reason Elmer brought this up again is because 1)there's no good news from Intel and b)he knows that the search capability of Silicon Investor doesn't reach as far back as the last discussion. Petz

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