On Wed, Jan 07, 2009 at 10:21:28AM -0500, Wirawan Purwanto wrote: > Hi Michael, > > Thanks for the answer. I would like to know if someone has investigated > this issue for some benchmark or real-world cases. Is there any > write-up/report/paper on this thing? You might want to look at milepost GCC: http://www.fursin.net/research_iter.html http://www.fursin.net/papers/fmtp2008.pdf http://cccpf.sourceforge.net/ I suspect many people have done tests, but often times not published the results. For example, when I worked for AMD, I sometimes did SPEC runs with -mtune=generic, -mtune=athlon, -mtune=barcelona, or -mtune=core2 to see how the tunings affected the real hardware. I recall that there were a few benchmarks which saw noticible differences (how integer to fp conversions was one that I looked at for a bit). -- Michael Meissner, IBM 4 Technology Place Drive, MS 2203A, Westford, MA, 01886, USA meissner@xxxxxxxxxxxxxxxxxx
