------- Comment #5 from andrew dot stubbs at st dot com 2007-09-17 10:30 ------- Subject: Re: New: [SH4] performance regression between 3.4.6 and 4.x
nbkolchin at gmail dot com wrote: > Our target hardware has SH7750 processor running in little endian mode under > RTEMS. Unfortunetaly there is no way to boot linux there. > > After lurking inside backend sources, I found that m4 has several variants in > GCC 4.x: m4-100, m4-200, etc. I've tried to compile this tests with m4-200 > switch, but it looks like m4-200 enforces big-endian. The 7750 has direct mapped caches and so is not the best platform for benchmarking. A slight code perturbation can give a large change in performance. :( The m4-200 option is NOT suitable for that target. The 7750 is a 100 series core (not that that was a nomenclature that existed when it came out). As far as I know, anybody that has a 200 series or above has an official ST toolset to go with it (GCC of course). Andrew -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33431
