User:Bjacob/ArithmeticTimingDifferences: Difference between revisions

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74 bytes added , 20 June 2013

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 Conventional "wisdom" is that DAZ is available nearly everywhere SSE2 is.
-This turns out not to be the case even for Intel CPUs: the [http://people.mozilla.org/~bjacob/ta/results/intel-pentium-m-1.4GHz-family-6-model-9-stepping-5-toshiba-tecra/ Pentium M] supports SSE2 but evidently [http://people.mozilla.org/~bjacob/ta/results/intel-pentium-m-1.4GHz-family-6-model-9-stepping-5-toshiba-tecra/time-math-x86-32-sse2-DAZ-FTZ.txt doesn't support DAZ].
+This turns out not to be the case even for Intel CPUs: this [http://people.mozilla.org/~bjacob/ta/results/intel-pentium-m-1.4GHz-family-6-model-9-stepping-5-toshiba-tecra/ Pentium M] supports SSE2 but evidently [http://people.mozilla.org/~bjacob/ta/results/intel-pentium-m-1.4GHz-family-6-model-9-stepping-5-toshiba-tecra/time-math-x86-32-sse2-DAZ-FTZ.txt doesn't support DAZ].
-It is also reported that some early Pentium 4 CPUs are in the same case.
+It is also reported that some early Pentium 4 CPUs were in the same case. Conversely, not ''all'' Pentium M's are affected (here is an [http://people.mozilla.org/~bjacob/ta/results/intel-pentium-m-1.6GHz-family-6-model-13-stepping-6-dell-inspiron600m-gavin/ unaffected one]).
-TODO: investigate more CPUs from the early 2000's, in particular some AMD CPUs like the Sempron, Athlon XP and Athlon 64 series.